Battery and electric device with same

Abstract

The application discloses a battery and an electric device with the same. The battery comprises a battery assembly, the battery assembly comprises a battery unit, the battery unit comprises a plurality of battery monomers arranged in a stacking manner along a first direction; and a heat exchange member arranged on one side of the battery assembly in a second direction, the first direction and the second direction intersect, the heat exchange member comprises a heat exchange pipe, the heat exchange pipe has a heat exchange flow channel, the heat exchange flow channel is bent and extended on the side surface of the battery assembly in the second direction, wherein, in the battery unit adhered to the heat exchange pipe, the wall surface of the battery monomer matched with the corresponding heat exchange pipe is a projection surface, and the area of the orthographic projection of the heat exchange pipe on the corresponding wall surface is greater than or equal to 15% of the area of the wall surface. According to the battery, the heat exchange rate between the heat exchange pipe and the battery monomer can be improved, the battery monomer can stably obtain good cooling and heat dissipation effects or heating and temperature rising effects, the temperature distribution in the battery assembly is more uniform, the operation of the battery is more stable and reliable, and the battery can maintain good battery performance.

Description

Batteries and electrical devices containing them

[0001] This case is a divisional application of Chinese Patent Application No. 202410172611.8, filed on February 6, 2024, entitled "Battery and Electrical Device Having the Same". Technical Field

[0002] This application relates to the field of battery technology, and in particular to a battery and an electrical device having the same. Background Technology

[0003] A good operating environment is one of the necessary conditions for the long-term, stable and efficient operation of many parts, electronic devices, components, devices and equipment. Maintaining a good operating environment plays a very important role in the proper operation of parts, electronic devices, components, devices and equipment.

[0004] Currently, batteries typically incorporate heat dissipation structures to cool or warm them, enabling them to operate at suitable temperatures in hot or cold weather. However, in related technologies, the number of individual battery cells within the battery pack is relatively large, and the rate of temperature rise and temperature uniformity of each cell under the heat exchange effect of the heat exchange components need further improvement.

[0005] Application content

[0006] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a battery that can effectively improve the heat exchange rate, resulting in better heat exchange performance of the battery cells, thereby enabling the battery to operate stably and maintain good battery performance.

[0007] In a first aspect, embodiments of this application provide a battery, comprising: a battery assembly, the battery assembly including battery cells, the battery cells including a plurality of battery cells stacked along a first direction; a heat exchanger disposed on one side of the battery assembly in a second direction, the first direction and the second direction intersecting, the heat exchanger including a heat exchange tube, the heat exchange tube having a heat exchange channel, the heat exchange channel extending and bending along one side surface of the battery assembly in the second direction, the wall surface of the battery cell cooperating with the corresponding heat exchange tube being a projection surface, and the area of ​​the orthographic projection of the heat exchange tube on the corresponding wall surface being greater than or equal to 15% of the area of ​​the wall surface.

[0008] In the above embodiments, by setting the heat exchange area between the heat exchange tube and the battery cell to be greater than or equal to 15% of the wall area of ​​the battery cell, the heat exchange rate between the heat exchange tube and the battery cell can be increased, so that the battery cell can stably obtain a good cooling and heat dissipation effect or a heating and temperature rise effect, thereby making the temperature distribution inside the battery module more uniform, making the battery operation more stable and reliable, and enabling the battery to maintain good battery performance.

[0009] In some embodiments of this application, the thickness of the battery cell in the first direction is greater than or equal to 40 mm, and the area of ​​the heat exchange tube projected onto the wall is greater than or equal to 30% of the wall area.

[0010] In the above embodiments, by setting the ratio of the heat exchange area of ​​the battery cell to the wall area to be greater than or equal to 30% when the thickness of the battery cell is greater than or equal to 40mm, the heat exchange contact area between the heat exchange tube and the battery cell can be better matched with the heat exchange requirements of the battery cell after the thickness is increased. This allows the battery assembly to be better maintained in a suitable temperature range, thereby improving the temperature uniformity of the battery assembly and making the battery operation more stable.

[0011] In some embodiments of this application, the thickness of the battery cell in the first direction is greater than or equal to 30 mm and less than 40 mm, and the area of ​​the heat exchange tube projected onto the wall is greater than or equal to 15% of the wall area and less than 30% of the wall area.

[0012] In the above embodiments, when the thickness of the battery cell is greater than or equal to 30 mm and less than 40 mm, the ratio of the heat exchange area of ​​the battery cell to the wall area is set to greater than or equal to 15% and less than 30%. This allows the heat exchange contact area between the heat exchange tube and the battery cell to be well matched with the heat exchange requirements of the battery cell after the thickness is increased. This enables the battery assembly to be well maintained within a suitable temperature range, thereby making the temperature distribution within the battery assembly more uniform and the battery operation more stable.

[0013] In some embodiments of this application, the thickness of the battery cell in the first direction is greater than or equal to 50 mm, and the area of ​​the heat exchange tube projected onto the wall is greater than or equal to 45% of the wall area.

[0014] In the above embodiments, by setting the ratio of the heat exchange area of ​​the battery cell to the wall area to be greater than or equal to 45% when the thickness of the battery cell is greater than or equal to 50 mm, the heat exchange contact area between the heat exchange tube and the battery cell can be better matched with the heat exchange requirements of the battery cell after the thickness is increased. This allows the battery assembly to be better maintained in a suitable temperature range, thereby improving the temperature uniformity of the battery assembly and making the battery operation more stable.

[0015] In some embodiments of this application, the thickness of the battery cell in the first direction is greater than or equal to 40 mm and less than 50 mm, and the area of ​​the heat exchange tube projected onto the wall is greater than or equal to 30% of the wall area and less than 45% of the wall area.

[0016] In the above embodiments, when the thickness of the battery cell is greater than or equal to 40 mm and less than 50 mm, the ratio of the heat exchange area of ​​the battery cell to the wall area is set to greater than or equal to 30% and less than 45%. This allows the heat exchange contact area between the heat exchange tube and the battery cell to be well matched with the heat exchange requirements of the battery cell after the thickness is increased. This enables the battery assembly to be well maintained within a suitable temperature range, thereby making the temperature distribution within the battery assembly more uniform and the battery operation more stable.

[0017] In some embodiments of this application, the thickness of the battery cell in the first direction is greater than or equal to 60 mm, and the area of ​​the heat exchange tube projected onto the wall is greater than or equal to 65% of the wall area.

[0018] In the above embodiments, by setting the ratio of the heat exchange area of ​​the battery cell to the wall area to be greater than or equal to 65% when the thickness of the battery cell is greater than or equal to 60mm, the heat exchange contact area between the heat exchange tube and the battery cell can be better matched with the heat exchange requirements of the battery cell after the thickness is increased. This allows the battery assembly to be better maintained in a suitable temperature range, thereby improving the temperature uniformity of the battery assembly and making the battery operation more stable.

[0019] In some embodiments of this application, the thickness of the battery cell in the first direction is greater than or equal to 50 mm and less than 60 mm, and the area of ​​the heat exchange tube projected onto the wall is greater than or equal to 45% of the wall area and less than 65% of the wall area.

[0020] In the above embodiments, when the thickness of the battery cell is greater than or equal to 50 mm and less than 60 mm, the ratio of the heat exchange area of ​​the battery cell to the wall area is set to greater than or equal to 45% and less than 65%. This allows the heat exchange contact area between the heat exchange tube and the battery cell to be well matched with the heat exchange requirements of the battery cell after the thickness is increased. This enables the battery assembly to be well maintained within a suitable temperature range, resulting in a more uniform temperature distribution within the battery assembly and more stable battery operation.

[0021] In some embodiments of this application, the thickness of the battery cell in the first direction is greater than or equal to 80 mm, and the area of ​​the heat exchange tube projected onto the wall is greater than or equal to 75% of the wall area.

[0022] In the above embodiments, by setting the ratio of the heat exchange area of ​​the battery cell to the wall area to be greater than or equal to 75% when the thickness of the battery cell is greater than or equal to 80 mm, the heat exchange contact area between the heat exchange tube and the battery cell can be better matched with the heat exchange requirements of the battery cell after the thickness is increased. This allows the battery assembly to be better maintained in a suitable temperature range, thereby improving the temperature uniformity of the battery assembly and making the battery operation more stable.

[0023] In some embodiments of this application, the thickness of the battery cell in the first direction is greater than or equal to 60 mm and less than 80 mm, and the area of ​​the heat exchange tube projected onto the wall is greater than or equal to 65% of the wall area and less than 75% of the wall area.

[0024] In the above embodiments, when the thickness of the battery cell is greater than or equal to 60 mm and less than 80 mm, the ratio of the heat exchange area of ​​the battery cell to the wall area is set to greater than or equal to 65% and less than 75%. This allows the heat exchange contact area between the heat exchange tube and the battery cell to be well matched with the heat exchange requirements of the battery cell after the thickness is increased. This enables the battery assembly to be well maintained within a suitable temperature range, resulting in a more uniform temperature distribution within the battery assembly and more stable battery operation.

[0025] In some embodiments of this application, the thickness of the battery cell in the first direction is greater than 100 mm, and the area of ​​the heat exchange tube projected onto the wall is greater than or equal to 90% of the wall area.

[0026] In the above embodiments, by setting the ratio of the heat exchange area of ​​the battery cell to the wall area to be greater than or equal to 90% when the thickness of the battery cell is greater than 100mm, the heat exchange contact area between the heat exchange tube and the battery cell can be better matched with the heat exchange requirements of the battery cell after the thickness is increased. This allows the battery assembly to be better maintained in a suitable temperature range, thereby improving the temperature uniformity of the battery assembly and making the battery operation more stable.

[0027] In some embodiments of this application, the thickness of the battery cell in the first direction is greater than or equal to 80 mm and less than or equal to 100 mm, and the area of ​​the heat exchange tube projected onto the wall is greater than or equal to 75% of the wall area and less than 90% of the wall area.

[0028] In the above embodiments, when the thickness of the battery cell is greater than or equal to 80 mm and less than or equal to 100 mm, the ratio of the heat exchange area of ​​the battery cell to the wall area is set to greater than or equal to 75% and less than 90%. This allows the heat exchange contact area between the heat exchange tube and the battery cell to be well matched with the heat exchange requirements of the battery cell after the thickness is increased. This enables the battery assembly to be well maintained within a suitable temperature range, resulting in a more uniform temperature distribution within the battery assembly and more stable battery operation.

[0029] In some embodiments of this application, the heat exchange channel includes a first heat exchange channel, which includes a first heat exchange section and a second heat exchange section; the second heat exchange section is bent to form a U-shaped region, the first heat exchange section is bent and disposed within the U-shaped region, and is bent and connected to the second heat exchange section, the battery cells located at the outermost periphery of the battery assembly constitute the outer battery cells, and at least a portion of the second heat exchange section is in contact with the outer battery cells.

[0030] In the above embodiment, by setting a first heat exchange channel in the heat exchange component, the second heat exchange section of the first heat exchange channel is connected to the first heat exchange section, the second heat exchange section is bent to form a U-shaped area and at least part of it is in contact with the outer battery cell, and the first heat exchange section is located in the U-shaped area, so that the heat exchange component has a better heat dissipation and cooling effect and a heating effect when performing heat exchange operation on the battery assembly, so that the temperature distribution inside the battery is more uniform, thereby making the battery operation more stable and maintaining good battery performance.

[0031] In one embodiment of this application, the peripheral battery cell includes a first group of battery cells, a second group of battery cells, and a third group of battery cells arranged adjacent to each other. The first group of battery cells includes multiple battery cells stacked along a first direction, the second group of battery cells includes multiple battery cells stacked along a third direction, and the third group of battery cells includes multiple battery cells stacked along a third direction. The first direction, the second direction, and the third direction are arranged at angles to each other. The second heat exchange section includes a second heat exchange part, a third heat exchange part, and a fourth heat exchange part connected together. The second heat exchange part extends and adheres to the first group of battery cells to enable heat exchange, and / or the third heat exchange part extends and adheres to the second group of battery cells to enable heat exchange, and / or the fourth heat exchange part extends and adheres to the third group of battery cells to enable heat exchange.

[0032] In the above embodiments, by setting a second heat exchange section, a third heat exchange section and a fourth heat exchange section in the second heat exchange section to be in contact with the first group of battery cells and / or the second group of battery cells and / or the third group of battery cells in the outer battery cells for heat exchange, the heat exchange component can stably and reliably cool or heat the outer battery cells, so that the battery assembly can have a good heat exchange effect, thereby making the battery operation more stable, and when the heat exchange component performs heat exchange operation on the battery assembly, the temperature distribution inside the battery is more uniform.

[0033] In some examples of this application, the peripheral battery cell also includes a fourth group of battery cells, the fourth group of battery cells including a plurality of battery cells arranged along a first direction, and the second heat exchange section also includes a fifth heat exchange section, the fifth heat exchange section closing at least a portion of the opening of the U-shaped region formed by the second heat exchange section, the third heat exchange section and the fourth heat exchange section, the fifth heat exchange section extending and adhering to the fourth group of battery cells to enable heat exchange.

[0034] In the above embodiment, by setting a fifth heat exchange section in the second heat exchange section and attaching it to the fourth group of battery cells, the second heat exchange section can exchange heat on the four sides of the battery module. In this way, the heat exchange section of the second heat exchange section with a first heat exchange flow channel can exchange heat on the four sides of the battery module, thereby improving the heat exchange effect on the four sides of the battery module and improving the temperature uniformity of the battery module.

[0035] In some examples of this application, the first heat exchange section includes a plurality of first heat exchange parts, which are arranged at intervals and sequentially bent and connected. At least one battery cell at each end in the third direction is a first group of battery cells. The second heat exchange part and at least one first heat exchange part of the first heat exchange section are in contact with the first group of battery cells to perform heat exchange.

[0036] In the above embodiment, by setting multiple first heat exchange sections in the first heat exchange section, with the multiple first heat exchange sections arranged at intervals and connected sequentially, the structure is simple and the arrangement is convenient, allowing the heat exchange component to exchange heat effectively with the battery assembly. By setting at least one first heat exchange section to cooperate with a second heat exchange section to adhere to the first group of battery cells, the heat exchange component can have sufficient heat exchange area with each battery cell in the first group of battery cells for heat exchange, thereby achieving a good heat exchange effect.

[0037] In one example of this application, a plurality of first heat exchange portions of the first heat exchange section extend along a third direction and are sequentially connected in a first direction; or, a plurality of first heat exchange portions of the first heat exchange section extend along a first direction and are sequentially connected in a third direction.

[0038] In the above embodiments, by setting the multiple first heat exchange parts of the first heat exchange section to extend along a third direction and be sequentially connected in the first direction, a single first heat exchange part and a single battery cell can have a large heat exchange area. This makes it easier and more reliable to meet the heat exchange area requirements of the battery cell when the heat exchange components are arranged on the battery assembly, and to a certain extent, it can reduce the difficulty of arranging the first heat exchange section. Setting the multiple first heat exchange parts to extend along the first direction and be sequentially connected in the third direction allows multiple first heat exchange parts to cooperate in heat exchange on a single battery cell to meet the required heat exchange area. This also allows the first heat exchange section to have fewer bends when it is arranged in a bent manner, resulting in less flow resistance in the first heat exchange section, smoother flow of heat exchange fluid and reduced pressure drop in the first heat exchange section, and thus the heat exchange components can better perform heat exchange operations on the battery cell.

[0039] In one example of this application, a plurality of first heat exchange sections of the first heat exchange section extend along a first direction and are sequentially connected in a third direction. The first end of the third heat exchange section is connected at an angle to the second heat exchange section. The second end of the third heat exchange section is connected to the one of the plurality of first heat exchange sections that is furthest from the second heat exchange section along a third direction. The second end of the third heat exchange section is connected at an angle to the first heat exchange section.

[0040] In the above embodiments, by connecting the third heat exchange section and the second heat exchange section at an angle and connecting the third heat exchange section and the first heat exchange section at an angle, it is more convenient to arrange the second heat exchange section and the first heat exchange section in the battery assembly, which can meet the arrangement requirements of heat exchange components and battery assembly. The structure is simple and easy to use.

[0041] In some specific embodiments of this application, the first heat exchange channel further includes: a third heat exchange section, which is connected to the end of the first heat exchange section away from the second heat exchange section and is connected at an angle to the first heat exchange section. The third heat exchange section is arranged on the side of the first heat exchange section away from the third heat exchange section and is connected to the one of the plurality of first heat exchange sections that is closest to the second heat exchange section along a third direction. The battery assembly also has a fifth group of battery cells, in which a plurality of battery cells of the fifth group of battery cells are stacked along a third direction and the fifth group of battery cells are arranged adjacent to the third group of battery cells. The third heat exchange section and the fourth heat exchange section are both in contact with the third group of battery cells to enable heat exchange; or, the third heat exchange section is in contact with the fifth group of battery cells to enable heat exchange, and the fourth heat exchange section is in contact with the third group of battery cells to enable heat exchange; or, the third heat exchange section is in contact with the third group of battery cells to enable heat exchange, and the fourth heat exchange section is arranged on the outer side of the battery assembly in the first direction.

[0042] In the above embodiment, by setting the third heat exchange section to be connected to the first heat exchange section and in contact with the second group of battery cells, when the heat exchanger performs heat exchange operations on the battery assembly, the flow direction of the heat exchange fluid in the second heat exchange section can be opposite to the flow direction of the heat exchange fluid near the second heat exchange section, the flow direction of the heat exchange fluid in the third heat exchange section can be opposite to the flow direction of the heat exchange fluid in the first heat exchange section, and the flow direction of the heat exchange fluid in the third heat exchange section can be opposite to the flow direction of the heat exchange fluid in the first heat exchange section. This allows the second, first, and third heat exchange sections to work together better for heat exchange operations, enabling the heat exchanger to perform heat exchange operations on battery cells at different locations in the battery more evenly and effectively. This results in a more uniform temperature distribution in the battery after heat exchange operations, and ultimately, more stable and reliable battery operation and good battery performance.

[0043] In the above embodiments, by cooperating the third heat exchange section and the fourth heat exchange part to be attached to the third group of battery cells, the heat exchange component and each battery cell in the third group of battery cells can have a good heat exchange area for heat exchange, so that the third group of battery cells can have a good heat exchange effect; the fourth heat exchange part is attached to the third group of battery cells and the third heat exchange section is attached to the fifth group of battery cells, which makes it more convenient to arrange the fourth heat exchange part and the third heat exchange section of the heat exchange component; the fourth heat exchange part is arranged on the outside of the battery assembly in the first direction, which can facilitate the injection and outflow of heat exchange fluid in the heat exchange component.

[0044] In one specific embodiment of this application, the first heat exchange channel further includes: a first inlet / outlet section, one end of which is connected at an angle to the third heat exchange section, and the other end of which forms a first inlet / outlet of the first heat exchange channel; and a second inlet / outlet section, one end of which is connected at an angle to the fourth heat exchange section, and the other end of which forms a second inlet / outlet of the first heat exchange channel, wherein one of the first inlet / outlet and the second inlet / outlet is the inlet of the first heat exchange channel and the other is the outlet.

[0045] In the above embodiments, by setting the first inlet and outlet section and the second inlet and outlet section, it is convenient for the external liquid injection device to introduce the heat exchange fluid for heat exchange into the first heat exchange channel, and it is convenient for the heat exchange component to adjust the flow direction of the heat exchange fluid in the first heat exchange channel as needed. The first inlet and outlet section and the second inlet and outlet section have simple structures and are easy to use.

[0046] In some examples of this application, the first heat exchange section includes a plurality of first heat exchange parts, which are spaced apart and sequentially bent and connected. The plurality of first heat exchange parts and the second heat exchange parts both extend along a first direction and are spaced apart in a third direction. A battery cell is attached to a second heat exchange part and at least one first heat exchange part to enable heat exchange; or, a battery cell is attached to at least two first heat exchange parts to enable heat exchange.

[0047] In the above embodiments, by setting one battery cell to be attached to one second heat exchange section and at least one first heat exchange section, or one battery cell to be attached to at least two first heat exchange sections, the heat exchange component can more conveniently meet the heat exchange area requirements of each battery cell in the battery cell. The first heat exchange section and the second heat exchange section both extend along the first direction and are arranged at intervals in the third direction, which makes it more convenient to arrange the heat exchange component in the battery, and makes the overall structure of the first heat exchange section and the second heat exchange section in the first heat exchange channel more compact.

[0048] In one example of this application, there are two first heat exchange channels, each including: five first heat exchange sections, one second heat exchange section, one third heat exchange section, one fourth heat exchange section, and one third heat exchange segment. There are four battery cells. The battery cell located at the end in the third direction is attached to two first heat exchange sections and one second heat exchange section for heat exchange. Any remaining battery cell is attached to three first heat exchange sections for heat exchange. The battery assembly also has a fifth group of battery cells. Multiple battery cells in the fifth group are stacked along the third direction, and the fifth group of battery cells is arranged adjacent to the third group of battery cells. The third heat exchange section connects the second heat exchange section and the first heat exchange section farthest from the second heat exchange section, and is attached to the second group of battery cells for heat exchange. The third heat exchange segment connects the first heat exchange section closest to the second heat exchange section and is attached to the fifth group of battery cells for heat exchange. The fourth heat exchange section is attached to the third group of battery cells for heat exchange.

[0049] In the above embodiment, by setting two first heat exchange channels for heat exchange with the battery assembly, the structure is simple and easy to arrange, which can improve the heat exchange efficiency of the heat exchange components to a certain extent, allowing the heat exchange components to better perform heat exchange operations on the battery assembly. The first heat exchange channel is provided with five first heat exchange sections, one second heat exchange section, one third heat exchange section, one fourth heat exchange section, and one third heat exchange segment. This ensures that the first heat exchange channel, when combined with the two battery cells, has sufficient heat exchange area to meet heat exchange requirements and improve the heat exchange rate.

[0050] The arrangement of the first, second, and third heat exchange sections in the first heat exchange channel allows the heat exchange components to work well with the heat exchange conditions of different locations within the battery cells during heat exchange operations. This ensures that the battery cells in different locations of the battery assembly achieve a more uniform heat exchange effect, resulting in a more even temperature distribution within the battery during heat exchange operations, leading to more stable battery operation and maintaining good battery performance.

[0051] In one example of this application, there are two first heat exchange channels, each including: five first heat exchange sections, one second heat exchange section, one third heat exchange section, one fourth heat exchange section, and one third heat exchange segment. There are six battery cells. The battery cell located at the end in the third direction is attached to one first heat exchange section and one second heat exchange section to exchange heat. Any remaining battery cell is attached to two first heat exchange sections to exchange heat. The battery assembly also has a fifth group of battery cells. Multiple battery cells in the fifth group are stacked along the third direction, and the fifth group of battery cells is arranged adjacent to the third group of battery cells. The third heat exchange section connects the second heat exchange section and the first heat exchange section farthest from the second heat exchange section, and is attached to the second group of battery cells to exchange heat. The third heat exchange segment connects the first heat exchange section closest to the second heat exchange section and is attached to the fifth group of battery cells to exchange heat. The fourth heat exchange section is attached to the third group of battery cells to exchange heat.

[0052] In the above embodiment, by setting two first heat exchange channels for heat exchange with the battery assembly, the structure is simple and easy to arrange, which can improve the heat exchange efficiency of the heat exchange components to a certain extent, allowing the heat exchange components to better perform heat exchange operations on the battery assembly. The first heat exchange channel is provided with five first heat exchange sections, one second heat exchange section, one third heat exchange section, one fourth heat exchange section, and one third heat exchange segment. This ensures that the first heat exchange channel, when combined with the two battery cells, has sufficient heat exchange area to meet heat exchange requirements and improve the heat exchange rate.

[0053] The arrangement of the first, second, and third heat exchange sections in the first heat exchange channel allows the heat exchange components to work well with the heat exchange conditions of different locations within the battery cells during heat exchange operations. This ensures that the battery cells in different locations of the battery assembly achieve a more uniform heat exchange effect, resulting in a more even temperature distribution within the battery during heat exchange operations, leading to more stable battery operation and maintaining good battery performance.

[0054] In one example of this application, there are two first heat exchange channels, each including: three first heat exchange sections, one second heat exchange section, one third heat exchange section, one fourth heat exchange section, and one third heat exchange segment. There are four battery cells. The battery cell located at the end in the third direction is attached to one first heat exchange section and one second heat exchange section to exchange heat. Any other battery cell is attached to two first heat exchange sections to exchange heat. The battery assembly also has a fifth group of battery cells. Multiple battery cells in the fifth group are stacked along the third direction, and the fifth group of battery cells is arranged adjacent to the third group of battery cells. The third heat exchange section connects the second heat exchange section and the first heat exchange section farthest from the second heat exchange section, and is attached to the second group of battery cells to exchange heat. The third heat exchange segment connects the first heat exchange section closest to the second heat exchange section, and is attached to the fifth group of battery cells to exchange heat. The fourth heat exchange section is attached to the third group of battery cells to exchange heat.

[0055] In the above embodiment, by setting two first heat exchange channels for heat exchange with the battery assembly, the structure is simple and easy to arrange, which can improve the heat exchange efficiency of the heat exchange components to a certain extent, allowing the heat exchange components to better perform heat exchange operations on the battery assembly. By setting three first heat exchange sections, one second heat exchange section, one third heat exchange section, one fourth heat exchange section, and one third heat exchange segment in the first heat exchange channel, the first heat exchange channel, when combined with the two battery cells, can have sufficient heat exchange area to meet heat exchange requirements and improve the heat exchange rate.

[0056] The arrangement of the first, second, and third heat exchange sections in the first heat exchange channel allows the heat exchange components to work well with the heat exchange conditions of different locations within the battery cells during heat exchange operations. This ensures that the battery cells in different locations of the battery assembly achieve a more uniform heat exchange effect, resulting in a more even temperature distribution within the battery during heat exchange operations, leading to more stable battery operation and maintaining good battery performance.

[0057] In one example of this application, the number of individual battery cells in each battery cell is 30.

[0058] In the above embodiment, each battery cell is provided with 30 individual battery cells, which can better meet the battery usage needs.

[0059] In some examples of this application, the first heat exchange section is connected downstream of the second heat exchange section along the fluid flow direction; or, the heat exchange tube is configured such that: when heating the battery assembly of the battery, the first heat exchange section is connected downstream of the second heat exchange section along the fluid flow direction; and when cooling the battery assembly of the battery, the first heat exchange section is connected upstream of the second heat exchange section along the fluid flow direction.

[0060] In the above embodiments, by determining the upstream and downstream relationship between the first heat exchange section and the second heat exchange section in the fluid flow direction according to the heat exchange condition of the heat exchanger, the heat exchanger can adjust the fluid flow direction accordingly based on the heating or cooling needs of the battery assembly. This allows the heat exchanger to better heat or cool the battery assembly, and to better coordinate with the heat dissipation and heat exchange needs at different locations within the battery assembly. This results in better heat dissipation and heating effects for the battery assembly, and a more uniform temperature distribution within the battery after heat exchange, leading to more stable battery operation and better battery performance.

[0061] In some examples of this application, the number of heat exchange tubes is one or more, and the inner side of each heat exchange tube defines a heat exchange flow channel. When the number of heat exchange tubes is multiple, the multiple heat exchange tubes are arranged at intervals along a third direction or arranged around each other, and the heat exchange flow channel of at least one heat exchange tube is formed as a first heat exchange flow channel.

[0062] In the above embodiments, by setting one or more heat exchange tubes, the heat exchange tubes can be reasonably set according to the heat exchange needs of the battery, thereby better meeting the heat exchange requirements of different batteries; the multiple first heat exchange channels are arranged at intervals along the first direction, and the overall structure of the first heat exchange channels can be arranged more compactly, thus making the design and arrangement of the heat exchange component more convenient; setting the multiple first heat exchange channels to be arranged around each other can make the overall integrity of the multiple first heat exchange channels in the heat exchange component better, and the overall structure of the heat exchange component can be arranged more flexibly and compactly, so that the heat exchange component can better meet the heat exchange area requirements of battery cells at different locations in the battery assembly.

[0063] In one example of this application, there are multiple heat exchange tubes, and the heat exchange channel of at least one heat exchange tube is formed as a second heat exchange channel. The structure of any second heat exchange channel may be the same as or different from the structure of the first heat exchange channel.

[0064] In the above embodiments, by providing at least one second heat exchange channel, the diversity of heat exchange channel arrangement can be increased, enabling the heat exchange component to better exchange heat with the battery assembly and improving the heat exchange effect of the heat exchange component.

[0065] In one example of this application, there are multiple heat exchange tubes, one of which defines a first heat exchange channel, and at least one heat exchange tube forms a third heat exchange channel. The third heat exchange channel is bent within the U-shaped region of the first heat exchange channel, and the first and third heat exchange channels are bent in the same plane. The bending structures of the first and third heat exchange channels may be the same or different.

[0066] In the above embodiments, by setting multiple heat exchange channels, the diversity of heat exchange channels can be increased, and the arrangement of heat exchange channels can be designed according to the cooling requirements of the battery, thereby further increasing the heat exchange effect of the heat exchange components and improving the temperature uniformity of the battery.

[0067] In some specific embodiments of this application, the third heat exchange channel includes a U-shaped region with the same structure as the first heat exchange channel, and at least a portion of the first heat exchange section of the first heat exchange channel is located within the U-shaped region of the third heat exchange channel.

[0068] In the above embodiments, by setting a third heat exchange channel including a U-shaped region with the same structure as the first heat exchange channel, and at least a portion of the first heat exchange section of the first heat exchange channel being located within the U-shaped region of the third heat exchange channel, the first heat exchange channel and at least a portion of the third heat exchange channel can be arranged around each other. In this way, the arrangement of the heat exchange channels can be arranged according to the heat exchange requirements of each part of the battery assembly, further increasing the heat exchange effect of the heat exchange components and improving the temperature uniformity of the battery.

[0069] In some embodiments of this application, the heat exchange tube is formed by bending a single tube; optionally, the heat exchange tube is bent in an arc at the bending position.

[0070] In the above embodiments, by setting the heat exchange tube to be formed by bending a single tube, the number of weld points in the heat exchange component can be reduced, thereby reducing the risk of leakage and improving the reliability of the heat exchange component. At the same time, the single-tube bending process is simpler to operate and uses less material compared to the manufacturing process of plate structures, significantly reducing the cost of the heat exchange component. By setting the heat exchange tube to bend in an arc shape at the bending point, the flow resistance of the fluid can be reduced, the pressure drop can be reduced, and the flow rate of the heat exchange fluid in the heat exchange channel can be increased, thereby increasing the heat exchange efficiency of the heat exchange component.

[0071] In some embodiments of this application, the heat exchange tube is an aluminum tube.

[0072] In the above embodiments, by using aluminum tubes as heat exchange tubes, aluminum tubes are lightweight, inexpensive, have good structural strength, and excellent thermal conductivity. This reduces the manufacturing cost of the heat exchange components and better meets the requirements for lightweight batteries. It also ensures good heat exchange efficiency when the heat exchange tubes exchange heat with the battery cells, thereby improving the heat exchange effect of the battery cells.

[0073] In some embodiments of this application, the wall thickness of the heat exchange tube is 0.2mm-3mm; optionally, the wall thickness of the heat exchange tube is 0.5mm-1.2mm.

[0074] In the above embodiments, by setting the wall thickness of the heat exchange tube to 0.2mm-3mm, the heat exchange tube has a suitable wall thickness, ensuring that the wall thickness is not too small, thereby guaranteeing the strength of the heat exchange tube and effectively reducing the risk of damage. It also ensures that the wall thickness is not too large, which helps to reduce the overall weight of the heat exchange tube, and thus the overall weight of the battery, achieving battery lightweighting. By setting the wall thickness of the heat exchange tube to 0.5mm-1.2mm, the strength of the heat exchange tube can be guaranteed while reducing its overall weight, achieving battery lightweighting.

[0075] In some embodiments of this application, the width of the heat exchange channel is 3mm-200mm; optionally, the width of the heat exchange channel is 5mm-80mm; further optionally, the height of the heat exchange channel in the second direction is 1mm-20mm; even more optionally, the height of the heat exchange channel in the second direction is 4mm-6mm.

[0076] In the above embodiments, by setting the width of the heat exchange channel to 3mm-200mm, the width of the heat exchange channel is not too large, which is beneficial to the layout of the heat exchange channel and can meet the heat exchange effect required by the heat exchange component. It also prevents the width of the heat exchange channel from being too small, thus reducing the number of first heat exchange sections and consequently reducing the overall cost of the heat exchange component. Further limiting the width of the heat exchange channel to between 5mm and 80mm allows the width to better meet the arrangement requirements of the heat exchange channel in the battery and the required heat exchange effect of the heat exchange component. Setting the height of the heat exchange channel in the second direction to 1mm-20mm ensures that the height of the heat exchange component is not too small, thereby guaranteeing the flow rate of the heat exchange fluid within the heat exchange component and ensuring the heat exchange effect. Setting the height of the heat exchange channel in the second direction to 4mm-6mm further guarantees the heat exchange effect, reduces the space occupied by the heat exchange component, and achieves battery miniaturization.

[0077] In some embodiments of this application, the heat exchange fluid in the heat exchange channel is a mixture of water and ethylene glycol; further optionally, the heat exchange fluid is a mixture of 50% water and 50% ethylene glycol; and / or, the thermal conductivity of the heat exchange fluid in the heat exchange channel is greater than or equal to 0.3 W / (m·K); further optionally, the thermal conductivity of the heat exchange fluid in the heat exchange channel is 0.328 W / (m·K)-0.417 W / (m·K).

[0078] In the above embodiment, the heat exchange fluid in the heat exchange channel is a mixture of water and ethylene glycol. Ethylene glycol aqueous solution has good stability and excellent heat transfer properties, allowing for effective heat exchange. Setting the thermal conductivity to be greater than or equal to 0.3 W / (m·K) ensures the heat exchange fluid has good heat exchange efficiency and effect, thus enabling the battery to achieve good heat exchange. Further limiting the thermal conductivity to between 0.328 W / (m·K) and 0.417 W / (m·K) further enhances the heat exchange fluid's efficiency and effect, resulting in even better heat exchange for the battery.

[0079] In some embodiments of this application, the casing of the battery cell is an aluminum casing.

[0080] In the above embodiments, the casing of the battery cell is made of aluminum, which is lightweight and can improve the energy density of the battery cell to a certain extent. The aluminum casing is easy to process and form, which makes the battery cell manufacturing efficiency higher. The aluminum casing has good thermal conductivity, which can make the heat exchange efficiency of the battery cell higher during heat exchange, thereby making the heat exchange effect of the battery cell better.

[0081] In some embodiments of this application, the casing of the battery cell is made of ternary aluminum alloy or pentylene aluminum alloy.

[0082] In the above embodiments, setting the casing of the battery cell as a three-series aluminum alloy or a five-series aluminum alloy can give the casing excellent processing and forming performance, corrosion resistance, thermal conductivity and good structural strength, and can transfer heat well, so that the battery cell has high heat exchange efficiency during heat exchange, thereby well meeting the use and protection needs of the battery cell.

[0083] In some embodiments of this application, the length of the battery cell is 154mm-234mm; and / or, the width of the battery cell is 63mm-103mm; and / or, the wall thickness of the battery cell casing is 0.4mm-1mm.

[0084] In the above embodiments, the length of the battery cell is set between 154mm and 234mm, and the width of the battery cell is set between 63mm and 103mm. This allows the battery cell to be configured with appropriate width dimensions according to different usage needs to meet the battery's usage requirements. The wall thickness of the battery cell casing is set between 0.4mm and 1mm, which ensures that the casing has sufficient strength to effectively protect the battery cell, enabling the battery cell to operate stably and reliably. Furthermore, the smaller wall thickness of the casing facilitates heat transfer between the inside and outside of the battery cell, allowing the battery cell to achieve better heat exchange performance.

[0085] In some embodiments of this application, the battery further includes a housing, which includes a housing body. The housing body is an integrally stamped part and includes a bottom wall and a surrounding wall. The battery assembly is disposed inside the housing body.

[0086] In the above embodiments, by setting the box body as an integral stamped part, the process steps of the box body can be reduced, the production cost of the box body can be reduced, and the overall weight of the box body can be reduced while ensuring the rigidity of the box body, thereby reducing the overall weight of the battery and reducing the load on the vehicle.

[0087] In one embodiment of this application, the thermal management system of the battery includes a temperature regulating element, which includes at least one of a first temperature regulating element and a second temperature regulating element. The first temperature regulating element is disposed outside the casing body and is attached to the outer wall of the casing body. The second temperature regulating element is disposed inside the casing body and is located between either side of the outer peripheral surface of the battery cell and the casing body. At least one of the first temperature regulating element and the second temperature regulating element forms a heat exchange element.

[0088] In the above embodiments, by placing the first temperature regulating element on the outside of the box body, the space occupied by the first temperature regulating element in the box body can be reduced, making it more convenient to arrange the battery pack in the box body. This can reduce the adverse effects of the first temperature regulating element on the operating environment of the battery pack in the box body, making the battery pack operate more stably and reliably, thereby enabling the battery to operate more stably and reliably to a certain extent.

[0089] By placing the second temperature regulating element between the housing and the battery pack, the heat transfer during heat exchange between the second temperature regulating element and the battery pack becomes more direct and efficient. This allows the second temperature regulating element to exchange heat with the battery pack more effectively, thus enabling it to perform temperature regulation better and allowing the battery to operate more stably.

[0090] By forming at least one of the first and second temperature regulating elements as a heat exchanger, the battery's thermal management system can better manage the battery's thermal performance, allowing the battery assembly to operate in a favorable temperature environment during battery operation, thereby making the battery operation more stable and the battery performance better.

[0091] In some examples of this application, the thermal management system of the battery also includes a third temperature regulating element, which is disposed in the housing and located between two adjacent battery cells. The structure of the third temperature regulating element may be the same as or different from that of the heat exchange element.

[0092] In the above embodiments, by setting a third temperature regulating element between adjacent battery cells, the battery cells in the battery assembly can obtain better heat exchange effect, thereby enabling the battery thermal management system to better regulate the temperature inside the battery and make the battery operation more stable.

[0093] Secondly, embodiments of this application provide an electrical device. By setting the battery described in the first aspect, the heat exchange area between the heat exchange tube and the battery cell is set to be greater than or equal to 15% of the wall area of ​​the battery cell. This can improve the heat exchange rate between the heat exchange tube and the battery cell, enabling the battery cell to stably obtain good cooling and heat dissipation effects or heating and temperature rise effects. This results in a more uniform temperature distribution within the battery assembly, more stable and reliable battery operation, and the battery maintaining good battery performance.

[0094] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0095] Figure 1 is a schematic diagram of a vehicle according to an embodiment of this application;

[0096] Figure 2 is an exploded view of a battery according to an embodiment of this application;

[0097] Figure 3 is an exploded view of a battery according to another embodiment of this application;

[0098] Figure 4 is a schematic diagram of the battery assembly and heat exchanger according to the first embodiment of this application;

[0099] Figure 5 is a schematic diagram of the battery assembly and heat exchanger according to the second embodiment of this application;

[0100] Figure 6 is a schematic diagram of the temperature distribution obtained by heat exchange simulation of the battery assembly according to an embodiment of this application with a heat exchange area of ​​15%;

[0101] Figure 7 is a schematic diagram of the temperature distribution obtained by heat exchange simulation of the battery assembly according to an embodiment of this application with a heat exchange area of ​​30%;

[0102] Figure 8 is a schematic diagram of the battery assembly and heat exchanger according to the third embodiment of this application;

[0103] Figure 9 is a schematic diagram of the battery assembly and heat exchanger according to the fourth embodiment of this application;

[0104] Figure 10 is a schematic diagram of the battery assembly and heat exchanger according to the fifth embodiment of this application;

[0105] Figure 11 is a schematic diagram of the battery assembly and heat exchanger according to the sixth embodiment of this application;

[0106] Figure 12 is a schematic diagram of the heat exchanger and battery housing according to some embodiments of this application;

[0107] Figure 13 is a schematic diagram of the heat exchanger and housing according to some other embodiments of this application;

[0108] Figure 14 is a schematic diagram of a heat exchanger from one angle according to an embodiment of this application;

[0109] Figure 15 is a cross-sectional view of a battery cell according to an embodiment of this application;

[0110] Figure 16 is a schematic diagram of a current collector according to an embodiment of this application;

[0111] Figure 17 is a schematic diagram of the current collector from another angle according to an embodiment of this application;

[0112] Figure 18 is a schematic diagram of a heat exchanger according to another embodiment of this application;

[0113] Figure 19 is an enlarged view of point A circled in Figure 18;

[0114] Figure 20 is a schematic diagram of the heat exchanger shown in Figure 18 from another angle;

[0115] Figure 21 is an enlarged view of point B circled in Figure 20;

[0116] Figure 22 is a schematic diagram of the battery assembly and heat exchanger according to the seventh embodiment of this application;

[0117] Figure 23 is a schematic diagram of the battery assembly and heat exchanger according to the eighth embodiment of this application;

[0118] Figure 24 is a schematic diagram of the battery assembly and heat exchanger according to the ninth embodiment of this application;

[0119] Figure 25 is a schematic diagram of the battery assembly and heat exchanger according to the tenth embodiment of this application;

[0120] Figure 26 is a schematic diagram of the battery assembly and heat exchanger according to the eleventh embodiment of this application;

[0121] Figure 27 is an exploded view of a battery according to another embodiment of this application;

[0122] Figure 28 is a partial schematic diagram of a battery according to another embodiment of this application;

[0123] Figure 29 is a partial cross-sectional view of a battery according to another embodiment of this application;

[0124] Figure 30 is a partial schematic diagram of the battery shown in Figure 27;

[0125] Figure 31 is an enlarged view of point C circled in Figure 30.

[0126] Figure label:

[0127] 1. Vehicles;

[0128] 1000, battery;

[0129] 100. Heat exchanger components;

[0130] 10. First heat exchange channel; 11. First heat exchange section; 111. First heat exchange part; 112. First bend; 12. Second heat exchange section; 120. U-shaped area; 121. Second heat exchange part; 122. Third heat exchange part; 123. Second bend; 124. Third bend; 125. Fourth heat exchange part; 126. Sixth bend; 127. Fifth heat exchange part; 13. Third heat exchange section; 14. Fourth bend; 15. First inlet / outlet section; 16. Fifth bend; 17. Second inlet / outlet section; 18. Seventh bend; 19. Mounting component;

[0131] 20. Current collector; 21. Pipe body; 211. First space; 212. Second space; 22. First flow channel interface; 23. Second flow channel interface; 24. Separation structure; 241. First partition plate; 242. Second partition plate;

[0132] 30. Second heat exchange channel; 31. Fourth heat exchange section; 40. Third heat exchange channel;

[0133] 200. Battery assembly; 201. Battery cell; 2011. Battery cell; 202. First group of battery cells; 203. Second group of battery cells; 204. Third group of battery cells; 205. Fourth group of battery cells; 206. Fifth group of battery cells;

[0134] 300. Box body; 301. Box main body; 302. Bottom guard plate; 303. Cover plate;

[0135] 400. Foam parts; 401. Body; 402. Convex ribs;

[0136] 500. Temperature regulating component; 501. First temperature regulating component; 502. Second temperature regulating component; 503. Third temperature regulating component;

[0137] 2000, controller; 3000, motor. Detailed Implementation

[0138] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0139] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0140] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0141] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0142] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0143] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two).

[0144] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0145] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0146] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing. Among the power batteries currently in use, lithium-ion batteries account for an increasingly larger proportion.

[0147] It is understandable that the temperature environment inside a battery is affected by the external environment. The individual battery cells need to operate within a certain temperature range. When the internal temperature exceeds or falls below this range, the battery's stability and performance will be significantly affected. For example, in hot weather, the battery needs to cool down the individual cells to maintain the required internal temperature; in cold weather, the battery needs to heat up the individual cells to keep the internal temperature within the necessary range.

[0148] In related technologies, batteries typically incorporate cold pipe structures to dissipate heat and cool down individual cells, as well as to heat them. However, this approach suffers from inadequate heat exchange rates. Specifically, the cooling rate is slow when the cold pipe structure is used to dissipate heat from the individual cells, and the heating rate is also slow when it is used to heat them. This results in insufficient heat dissipation or heating efficiency for the individual cells, leading to battery instability and performance degradation. Here, battery performance refers to parameters such as capacity, charge / discharge rate, and voltage.

[0149] When the cold pipe structure cools the battery cells, it cannot dissipate heat from the battery cells in time, resulting in the battery cells' temperature not being effectively and timely reduced. When the cold pipe structure heats the battery cells, the battery cells' temperature does not easily rise to the normal operating temperature range. Therefore, the heating effect of the cold pipe structure on the battery cells needs to be further improved.

[0150] Based on the above considerations, in order to improve the heating or cooling rate of the battery cells when the cold pipe structure heats or cools them, so that the battery has a good heating or cooling effect, and thus makes the battery operation more stable and maintains good performance, this application proposes a battery in which a heat exchange component is provided. The heat exchange component has a heat exchange tube, which contacts one side surface of the battery cell for heat exchange. The heat exchange contact area between the heat exchange tube and the battery cell is limited so that the heat exchange tube and the battery cell have a sufficient heat exchange area. This allows the heat exchange component to have a good heating or cooling rate when exchanging heat with the battery cell, so that the battery cell can maintain a good heating or cooling effect, thereby making the battery operation more stable and maintaining good battery performance.

[0151] The battery disclosed in this application can be used in electrical devices that use batteries as a power source, or in various energy storage systems that use batteries as energy storage elements. The electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0152] In this embodiment, the battery cell can be a rechargeable battery, which refers to a battery cell that can be recharged after discharge to activate the active materials and continue to be used. The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, nano-metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc.

[0153] Referring to Figure 1, which is a schematic diagram of a vehicle 1 provided in some embodiments of this application, vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery 1000 is installed inside vehicle 1, and the battery 1000 can be located at the bottom, front, or rear of vehicle 1. The battery 1000 can be used to power vehicle 1; for example, the battery 1000 can serve as the operating power source for vehicle 1. Vehicle 1 may also include a controller 2000 and a motor 3000. The controller 2000 is used to control the battery 1000 to supply power to the motor 3000, for example, to meet the power needs of vehicle 1 during starting, navigation, and driving.

[0154] In some embodiments of this application, the battery 1000 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0155] Referring to Figures 2 and 3, Figure 2 is an exploded view of a battery 1000 according to an embodiment of the present application, and Figure 3 is an exploded view of a battery 1000 according to another embodiment of the present application. The battery 1000 includes a housing 300, a battery cell 2011, and a heat exchanger 100. The housing has a receiving cavity, and the battery cell 2011 is received in the receiving cavity of the housing 300. The heat exchanger 100 can be disposed between the battery cell 2011 and the housing 300, or between adjacent battery cells 2011.

[0156] The housing 300 provides a space for housing the battery cell 2011 and can adopt various structures. In some embodiments, the housing 300 may include a first part (e.g., housing body 301 hereinafter) and a second part (e.g., cover plate 303 hereinafter), which overlap each other and together define a space for housing the battery cell 2011. The second part may be a hollow structure with one open end, and the first part may be a plate-like structure, with the first part covering the open side of the second part so that the first and second parts together define the space; alternatively, both the first and second parts may be hollow structures with one open side, with the open side of the first part covering the open side of the second part. Of course, the housing formed by the first and second parts can be of various shapes, such as a cylinder, a cuboid, etc. Optionally, in some embodiments, the housing 300 further includes a bottom protective plate 302, which is disposed on the underside of the bottom plate of the housing 300 to further enhance the load-bearing strength and impact resistance of the bottom of the housing 300. The base plate can be made of various materials, including but not limited to: copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0157] In battery 1000, there can be multiple battery cells 2011. These multiple battery cells 2011 can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 2011 are connected in both series and parallel. Multiple battery cells 2011 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of the multiple battery cells 2011 is housed within the casing 300. Alternatively, battery 1000 can also be composed of multiple battery cells 2011 first connected in series, parallel, or in a mixed manner to form battery 1000 modules, and then these modules are connected in series, parallel, or in a mixed manner to form a whole, which is also housed within the casing 300. Battery 1000 may also include other structures; for example, it may include a busbar component for electrical connection between multiple battery cells 2011.

[0158] Each battery cell 2011 can be a secondary battery 1000 or a primary battery 1000; it can also be a lithium-sulfur battery 1000, a sodium-ion battery 1000, or a magnesium-ion battery 1000, but is not limited to these. The battery cell 2011 can be cylindrical, flat, cuboid, or other shapes.

[0159] In the battery 1000, the heat exchanger 100 can be disposed between the multiple battery cells 2011 and the top wall of the housing 300, or between the multiple battery cells 2011 and the bottom wall of the housing 300, or between the bottom wall of the housing 300 and the bottom protective plate 302, or between two adjacent battery cells 2011, to provide heat exchange for the multiple battery cells 2011. In some embodiments, the heat exchanger 100 may include a heat exchange tube and a current collector 20, wherein the heat exchange tube is connected to the current collector 20, and the heat exchange tube may be a flat tube, a round tube, a harmonica tube, or other shaped tube, and the current collector 20 may be a rectangular tube or a round tube, etc.

[0160] The battery 1000 according to a first aspect embodiment of the present application is described below with reference to Figures 4-15. Figure 4 is a schematic diagram of the battery assembly 200 and heat exchanger 100 according to a first embodiment of the present application; Figure 5 is a schematic diagram of the battery assembly 200 and heat exchanger 100 according to a second embodiment of the present application; Figure 6 is a schematic diagram of the temperature distribution obtained by heat exchange simulation of the battery assembly 200 with a heat exchange area of ​​15% according to an embodiment of the present application; Figure 7 is a schematic diagram of the temperature distribution obtained by heat exchange simulation of the battery assembly 200 with a heat exchange area of ​​30% according to an embodiment of the present application; Figure 8 is a schematic diagram of the battery assembly 200 and heat exchanger 100 according to a third embodiment of the present application; Figure 9 is a schematic diagram of the battery pack according to a fourth embodiment of the present application. Figure 10 is a schematic diagram of the battery assembly 200 and heat exchanger 100 according to a fifth embodiment of the present application; Figure 11 is a schematic diagram of the battery assembly 200 and heat exchanger 100 according to a sixth embodiment of the present application; Figure 12 is a schematic diagram of the heat exchanger 100 and the housing 300 of the battery 1000 according to some embodiments of the present application; Figure 13 is a schematic diagram of the heat exchanger 100 and the housing 300 according to other embodiments of the present application; Figure 14 is a schematic diagram of the heat exchanger 100 from one angle according to an embodiment of the present application; Figure 15 is a cross-sectional view of the battery cell 2011 according to an embodiment of the present application.

[0161] According to a first aspect embodiment of this application, a battery 1000 includes a battery assembly 200 and a heat exchanger 100. The battery assembly 200 includes battery cells 201, each battery cell 201 comprising a plurality of battery cells 2011 stacked along a first direction (X direction as shown in FIG. 4). The heat exchanger 100 is disposed on one side of the battery assembly 200 in a second direction (Z direction as shown in FIG. 3), the first direction and the second direction intersecting. The heat exchanger 100 includes a heat exchange tube having a heat exchange channel, the heat exchange channel extending and bending along one side surface of the battery assembly 200 in the second direction. The wall surface of the battery cell 2011 that mates with the corresponding heat exchange tube is a projection surface, and the area of ​​the orthographic projection of the heat exchange tube onto the corresponding wall surface is greater than or equal to 15% of the area of ​​the wall surface.

[0162] The battery assembly 200 includes a battery unit 201. There may be one or more battery units 201. When there are multiple battery units 201, the number of battery units 201 may be two, three, four, five, etc. Each battery unit 201 includes multiple battery cells 2011 stacked along a first direction. Each battery cell 2011 may be a cylindrical battery 1000, a square battery 1000, or a pouch battery 1000, etc. There may be two, three, four, five, six, etc. The number of battery cells 2011 in each battery unit 201 may be the same or different. The number of battery cells 2011 in each battery unit 201 can be set according to the design requirements of the battery 1000.

[0163] The phrase "the first direction intersects with the second direction" is intended to indicate that the first and second directions can be arranged perpendicularly or they can be arranged to intersect but not perpendicularly, that is, they can be arranged to intersect at an acute or obtuse angle. For example, the first and second directions can be arranged at an angle of 30°, 60°, 80°, 120°, 150° or 170°.

[0164] The heat exchanger 100 includes a heat exchange tube with a heat exchange channel. The heat exchange tube defines the heat exchange channel. The heat exchange fluid in the heat exchange channel exchanges heat with the battery assembly 200 through the heat exchange tube. The cross-section of the heat exchange tube can be circular, elliptical, square, rectangular, etc. The cross-sectional shape of the heat exchange tube can be reasonably set according to needs.

[0165] The heat exchange channels extend on one side surface of the battery module 200 in the second direction. That is, the heat exchange channels extend on one side surface of multiple battery cells 2011 in the second direction, and the heat exchanger 100 can cooperate with the one side surface of the battery cells 2011 in the second direction for heat exchange. The heat exchange channels bend and extend on one side surface of the battery module 200 in the second direction, and the heat exchange channels can be bent to change the direction of extension.

[0166] For example, when the heat exchange channel extends along the first direction, it can be bent to change the direction of extension to extend in a direction perpendicular to the first direction. The heat exchange channel can also be bent multiple times to form multiple channel segments that extend the same distance in the first direction. The multiple channel segments are arranged at intervals in the direction perpendicular to the first direction. The specific bending form of the heat exchange channel can be reasonably arranged according to the heat exchange requirements.

[0167] When the heat exchanger 100 cools or heats the multiple battery cells 2011 of the battery assembly 200, the heat exchange fluid used for cooling or heating can flow along the heat exchange channel. The heat exchange fluid cools or heats the battery cell 2011 from the side surface of the battery cell 2011 that abuts against the heat exchange tube. Specifically, when the heat exchanger 100 cools the battery cell 2011, the heat in the battery cell 2011 can be transferred to the casing of the battery cell 2011. The heat is transferred along the casing to the side surface of the battery cell 2011 that cooperates with the heat exchange tube. The heat is then transferred through the heat exchange tube to the heat exchange fluid in the heat exchange channel. The heat exchange fluid flows to carry away and dissipate the heat. Thus, the heat exchange fluid continuously carries away the heat along the heat exchange channel to cool and dissipate heat from the battery cell 2011.

[0168] When the heat exchanger 100 heats the battery cell 2011, the heat exchange fluid carrying heat flows along the heat exchange channel. The heat in the heat exchange fluid is transferred to the side surface of the battery cell 2011 that cooperates with the heat exchange tube through the heat exchange tube. The heat is transferred along the shell of the battery cell 2011 to the battery cell 2011 to heat the battery cell 2011. Thus, the heat exchange fluid flows along the heat exchange channel and continuously transfers heat to the battery cell 2011 to heat the battery cell 2011.

[0169] The wall surface where the battery cell 2011 mates with the heat exchange tube is set as a projection surface. Here, the wall surface where the battery cell 2011 mates with the heat exchange tube refers to the surface of the battery cell 2011 in the battery assembly 200 on one side in the second direction. Specifically, the wall surface is the outer surface of the housing of the battery cell 2011 on one side in the second direction. When the heat exchanger 100 heats or cools the battery cell 2011, heat is transferred from the battery cell 2011 to the heat exchange fluid in the heat exchange tube through the wall surface, or heat is transferred from the heat exchange fluid in the heat exchange tube to the battery cell 2011.

[0170] The area of ​​the heat exchange tube's orthographic projection on the wall surface refers to the projection of the heat exchange tube onto the projection surface along a direction parallel to the second direction. In other words, it refers to the area of ​​the heat exchange surface in the heat exchange tube used for heat exchange with a single battery cell 2011. In other words, it can refer to the heat exchange area between the battery cell 2011 and the heat exchange tube. The area of ​​the heat exchange tube's orthographic projection on the wall surface is set to be greater than 15% of the wall surface area. That is to say, the heat exchange area between the battery cell 2011 and the heat exchange tube (hereinafter referred to as the heat exchange area of ​​the battery cell 2011) is greater than 15% of the wall surface area of ​​the battery cell 2011. For example, the heat exchange area of ​​the battery cell 2011 can be 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, etc. of the wall surface area of ​​the battery cell 2011.

[0171] It is understandable that when the battery cell 2011 is cooling down or heating up, if the temperature of the heat exchange fluid remains constant, the larger the heat exchange area between the battery cell 2011 and the heat exchange tube, the faster the cooling or heating rate of the battery cell 2011 will be.

[0172] In the above embodiment, the heat exchange area of ​​the battery cell 2011 is limited to 15% or more of the wall area of ​​the battery cell 2011. When the heat exchanger 100 cools or heats the battery cell 2011, the heat exchange contact area between the heat exchange tube and each battery cell 2011 can be increased, thereby improving the heat exchange rate of the battery cell 2011, that is, improving the cooling rate and heating rate of the battery cell 2011. In this way, not only can the battery cell 2011 quickly reach the preset temperature range when the battery assembly 200 starts to work, but also the battery assembly 200 can be kept within a suitable temperature range during normal operation, reducing the temperature fluctuation of the battery cell 2011 during operation, thereby making the operation of the battery cell 2011 more stable, and thus making the operation of the battery 1000 stable, and the battery 1000 can maintain good battery 1000 performance.

[0173] In addition, by setting the heat exchange area of ​​the battery cell 2011 to be greater than or equal to 15% of the wall area of ​​the battery cell 2011, the contact area between the battery cell 2011 and the heat exchange tube can be increased. This increases the arrangement density of the heat exchange tube on the surface of the battery assembly 200. The increased arrangement density of the heat exchange tube improves the uniformity of heat transfer between the heat exchanger 100 and the battery assembly 200 at various locations, thereby improving the temperature uniformity of the battery assembly 200 and enhancing the temperature uniformity of the battery 1000.

[0174] The following is a simulation experiment analysis of two specific examples of the battery 1000 in this application, using FloEFD simulation software.

[0175] In the simulation analysis, the battery assembly 200 of battery 1000 is set to include four battery units 201. Each battery unit 201 includes 30 battery cells 2011 stacked along the thickness direction. The four battery units 201 are stacked along the length direction of the battery cells 2011. Each battery cell 2011 has a length of 194 mm, a width of 83 mm, and a thickness of 30 mm. The wall thickness of the casing of the battery cell 2011 is 0.55 mm. The battery cell 2011 can be either a lithium iron phosphate battery 1000 or a ternary lithium battery 1000. The casing of the battery cell 2011 is set to be ternary aluminum, which includes the following components by mass percentage: aluminum ≥ 99.6%, copper ≤ 0.05%, iron ≤ 0.35%, magnesium ≤ 0.03%, manganese ≤ 0.03%, silicon ≤ 0.25%, titanium ≤ 0.03%, vanadium ≤ 0.05%, zinc ≤ 0.05%, and other individual elements ≤ 0.03%.

[0176] The ambient temperature of the simulation experiment was set to -20℃, the initial temperature of the battery cell 2011 was -20℃, and the target temperature of the battery cell 2011 was 0℃.

[0177] A heat exchanger 100 is positioned at the bottom of the battery assembly 200. The heat exchanger 100 includes two symmetrically arranged heat exchange tubes, each comprising a first heat exchange section 11 and a second heat exchange section 12 connected sequentially. The second heat exchange section 12 bends around the periphery of the battery assembly 200, forming a U-shaped region 120. The first heat exchange section 11 extends meanderingly along the thickness direction of the battery cell 2011 within the U-shaped region 120. The openings of the U-shaped regions of the two heat exchange tubes are arranged facing each other along the length of the battery cell 2011. The inlets and outlets of the two heat exchange tubes are arranged side-by-side in the middle region of one side of the battery assembly 200 along the thickness direction of the battery cell 2011.

[0178] The heat exchange tube is set to be an aluminum tube, and the contact between the heat exchange tube and the battery module 200, as well as the contact between adjacent battery cells 2011, are all ideal contacts.

[0179] The heat exchange fluid inside the heat exchange tube is set to be a mixture of 50% water and 50% ethylene glycol, with a density between approximately 1.11 g / cm³ and 1.13 g / cm³, a specific heat capacity of approximately 4.18 J / (g·℃), a thermal conductivity of approximately 0.229 W / (m·K), and a viscosity of approximately 0.00014 Pa·s.

[0180] During the simulation, the heat exchanger 100 is used to heat the battery assembly 200. The inlet temperature of the heat exchange fluid in the heat exchange tube is set to 40°C, the flow rate of the heat exchange fluid is 8L / min, and the heat exchange fluid enters from the second heat exchange section 12 and then flows out from the first heat exchange section 11.

[0181] In Example ①, the heat exchange area between the battery cell 2011 and the heat exchange tube is set to 15% of the wall area of ​​the battery cell 2011. Simulation analysis of Example ① shows that heating of the heat exchanger 100 stops once the battery module 200 reaches the target temperature. At this point, the temperature rise rate of the battery module 200 is 0.5℃ / min. Simultaneously, a temperature distribution cloud map of the battery module 200 can be obtained, as shown in Figure 6.

[0182] As can be seen from Figure 6, when the ratio of the heat exchange area of ​​battery cell 2011 to the area of ​​the wall of battery cell 2011 is 15%, in the overall temperature distribution cloud map, the lowest temperature inside battery 1000 is 0.02℃, the highest temperature inside battery 1000 is 5.63℃, and the maximum temperature difference inside battery 1000 is 5.61℃.

[0183] In Example ②, the heat exchange area between the battery cell 2011 and the heat exchange tube is set to 30% of the wall area of ​​the battery cell 2011. Simulation analysis of Example ② shows that heating of the heat exchanger 100 is stopped once the battery module 200 reaches the target temperature. At this point, the temperature rise rate of the battery module 200 is 0.914℃ / min. Simultaneously, a temperature distribution cloud map of the battery module 200 can be obtained, as shown in Figure 7, which is a temperature distribution map obtained from the simulation experiment of the battery 1000 in this embodiment.

[0184] As can be seen from Figure 7, when the ratio of the heat exchange area of ​​battery cell 2011 to the area of ​​the wall of battery cell 2011 is 30%, in the overall temperature distribution cloud map, the lowest temperature inside battery 1000 is 0.01℃, the highest temperature inside battery 1000 is 4.10℃, and the maximum temperature difference inside battery 1000 is 4.09℃.

[0185] As can be seen from the above, when the ratio of the heat exchange area of ​​the battery cell 2011 to the area of ​​the battery cell 2011 wall increases from 15% to 30%, the temperature rise rate of the battery module 200 increases from 0.5℃ / min to 0.914℃ / min, and the maximum temperature difference inside the battery module 200 decreases from 5.61℃ to 4.09℃.

[0186] From the above, it can be concluded that when the ratio of the heat exchange area of ​​the battery cell 2011 to the area of ​​the battery cell 2011 wall is greater than or equal to 15%, the temperature rise rate of the battery module 200 is greater than or equal to 0.5℃ / min, and the maximum temperature difference within the battery module 200 is less than or equal to 8℃. Furthermore, the maximum temperature difference within the battery module 200 is less than or equal to 6℃. As the heat exchange area of ​​the battery cell 2011 increases, the temperature rise rate of the battery 1000 increases, and the maximum temperature difference within the battery module 200 decreases.

[0187] The following section divides the multiple battery cells 2011 of the battery module 200 into regions and provides a more detailed analysis of the temperature distribution cloud map of each region.

[0188] It should be noted that, for ease of connection of the current collector, the inlets and outlets of the two heat exchange tubes are arranged side by side. Due to the influence of the inlet water temperature, the temperature of the battery cells 2011 adjacent to the inlets and outlets of the heat exchange tubes in the battery module 200 is usually significantly higher than the temperature of the other battery cells 2011. Therefore, the area where the three rows of battery cells 2011 adjacent to the inlets of the heat exchange tubes in the battery module 200 are located is designated as the first region s1. Meanwhile, as shown in Figure 6, the battery cells 2011 located on the other side of the battery module 200 opposite to the first region s1 also exhibit localized temperature increases. The area where the three rows of battery cells 2011 along the other edge of the battery module 200 are located is designated as the second region s2. The remaining areas of the battery module 200, excluding the first region s1 and the second region s2, are designated as the third region s3.

[0189] For the third region s3, as shown in Figure 6, the lowest temperature in region s3 of Example ① is 0.76℃, the highest temperature is 1.35℃, and the maximum temperature difference is 0.59℃. As shown in Figure 7, the lowest temperature in region s3 of Example ② is 0.46℃, the highest temperature is 1.01℃, and the maximum temperature difference is 0.55℃.

[0190] As can be seen from the above, in the third region s3 of Examples ① and ②, the maximum temperature difference of the battery module 200 is less than 1℃. Therefore, it can be concluded that when the heat exchange area of ​​the battery cell 2011 is greater than or equal to 15% of the area of ​​the battery cell 2011 wall, the temperature difference within the battery module 200 in the third region s3 can be less than or equal to 2℃, and further, less than or equal to 1℃, thus resulting in a very uniform temperature distribution.

[0191] Meanwhile, in the third region s3 of Example ①, the maximum difference from the target temperature of 0℃ is 1.35℃, and in the third region s3 of Example ②, the maximum difference from the target temperature of 0℃ is 1.01℃. That is, when the ratio of the heat exchange area of ​​the battery cell 2011 to the area of ​​the battery cell 2011 wall increases from 15% to 30%, the maximum difference from the target temperature in the third region s3 decreases from 1.35℃ to 1.01℃. Therefore, it can be concluded that as the heat exchange area increases, the difference between the battery cell 2011 and the target temperature in the third region s3 becomes smaller, resulting in a more uniform temperature distribution in the battery module 200.

[0192] As can be seen from Figure 6, the highest temperature of 5.63℃ in Example ① occurs in the second region s2. In Figure 7, the two temperature measurement points in the second region s2 of Example ② are 0.28℃ and 0.01℃, respectively, which are very close to the target temperature value. That is, in Example ②, the temperature of battery cell 2011 in the second region s2 and the temperature of battery cell 2011 in the third region s3 are basically in the range of 0℃-1℃.

[0193] It should be noted that in Example ①, the ratio of the heat exchange area to the wall area of ​​the battery cell 2011 is 15%, that is, the ratio of 15% between the heat exchange area and the wall area of ​​the battery cell 2011 in Example ① is the lower limit value of the ratio of the heat exchange area to the wall area of ​​the battery cell 2011 in this application being greater than or equal to 15%. In Example ②, the ratio of the heat exchange area to the wall area of ​​the battery cell 2011 is 30%.

[0194] Since both Examples ① and ② include two heat exchange tubes, the length of the heat exchange tube in Example ① is shorter than that in Example ②. This results in a lower flow resistance in Example ① compared to Example ②. Furthermore, when the heat exchange fluid moves from the third region s3 to the second region s2, the heat exchange channel of the heat exchange tube bends, causing the heat exchange fluid to accumulate at the second region s2. Therefore, compared to the second region s2 in Example ②, the second region s2 in Example ① has a higher fluid velocity per unit time, a greater total heat exchange, a higher and faster local temperature rise, and a larger temperature difference between it and the battery cell 2011 in the third region s3.

[0195] As the above analysis shows, when the ratio of the heat exchange area to the wall area of ​​the battery cell 2011 in Example ① is 15% of the lower limit value, the temperature difference between the third region s3 and the target temperature can be less than 2℃, and the overall temperature difference of the battery module 200 can be maintained at less than 6℃. However, due to the lower limit value of the heat exchange tube arrangement density and the bends in the heat exchange channel, in addition to the first region s1 adjacent to the heat exchange tube inlet having a higher temperature point, there is also a large temperature difference between the second region s2 and the target temperature, and the temperature uniformity needs to be further improved. This also indirectly proves that when the ratio of the heat exchange area to the wall area of ​​the battery cell 2011 is less than 15%, the uniformity of the temperature distribution of the battery module 200 needs to be improved.

[0196] In Example ②, when the ratio between the heat exchange area of ​​the battery cell 2011 and the area of ​​the battery cell 2011 wall is 30%, the temperature difference between the second region s2 and the third region s3 and the target temperature is basically within 1℃. Only the temperature of the first region s1, which is arranged adjacent to the water inlet, is slightly higher, but the overall temperature difference of the battery module 200 can also be less than 5℃.

[0197] From the above, it can be concluded that when the ratio of the heat exchange area of ​​the battery cell 2011 to the area of ​​the battery cell 2011 wall increases from 15% to 30%, the temperature difference between the second region s2 and the target temperature can be reduced from 5.63℃ to 0.01℃. That is, as the heat exchange area of ​​the battery cell 2011 increases, the temperature uniformity between the second region s2 and the third region s3 of the battery module 200 is significantly improved.

[0198] As can be seen from the above simulation analysis, the battery 1000 in this embodiment of the application, by limiting the heat exchange area of ​​the battery cell 2011 to more than or equal to 15% of the wall area of ​​the battery cell 2011, can not only improve the temperature rise rate of the battery module 200 and enable the battery 1000 to quickly reach the preset temperature, but also, under the condition that other conditions remain unchanged, the temperature rise rate increases with the increase of the heat exchange area.

[0199] Meanwhile, the battery 1000 in this embodiment can make the difference between the highest and lowest temperatures of the battery module 200 in the third region s3 less than 2°C. Furthermore, it can make the difference between the highest and lowest temperatures of the third region s3 and the second region s2 less than 1°C. That is, the internal temperature difference of the battery module 200 can be controlled within a small range, thereby improving the temperature uniformity within the battery module 200. And under the condition that other conditions remain unchanged, the temperature uniformity of the battery module 200 is better as the heat exchange area increases.

[0200] In the above embodiments, the heat exchange contact area between the heat exchange tube and each battery cell 2011 can be increased to improve the heat exchange rate of the battery cell 2011. This not only allows the battery cell 2011 to quickly reach the preset temperature range when the battery assembly 200 starts working, but also keeps the battery assembly 200 within a suitable temperature range during normal operation, reducing temperature fluctuations of the battery cell 2011 during operation, thereby making the operation of the battery cell 2011 more stable, and thus making the operation of the battery 1000 more stable.

[0201] In some embodiments of this application, the thickness of the battery cell 2011 in the first direction is greater than or equal to 40 mm, and the area of ​​the heat exchange tube projected onto the wall surface can be greater than or equal to 30% of the wall surface area.

[0202] The thickness of the battery cell 2011 in the first direction is set to be greater than or equal to 40mm. Specifically, the battery cell 2011 can be a square battery 1000. The thickness direction of the battery cell 2011 is parallel to the first direction. The casing of the battery cell 2011 has large surfaces on both sides in the first direction. The thickness of the battery cell 2011 can be 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, etc. The area of ​​the heat exchange tube projected onto the wall is set to be greater than or equal to 30% of the wall area. For example, the heat exchange area of ​​the battery cell 2011 can be 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, etc. of the wall area. The ratio of the heat exchange area of ​​the battery cell 2011 to the wall area can be set according to the thickness of the battery cell 2011.

[0203] It is understandable that when the thickness of the battery cell 2011 increases, the overall volume of the battery cell 2011 increases, and the amount of heat exchange required for the battery cell 2011 to achieve the same heating and cooling rates increases.

[0204] Although the wall area of ​​the battery cell 2011 that mates with the heat exchange tube increases with the increase in thickness of the battery cell 2011 while the heat exchange tube structure remains unchanged, the increased heat exchange contact area cannot meet the heat exchange requirements after the battery cell 2011 increases in volume.

[0205] Therefore, to meet the heat exchange requirements of the battery cell 2011 after its thickness increases to 40mm or more, this embodiment sets the area of ​​the heat exchange tube's orthogonal projection on the wall surface to be greater than or equal to 30% of the wall surface area. This increases the heat exchange area between the battery cell 2011 and the heat exchange tube, making the heat exchange contact area between the battery cell 2011 and the heat exchange tube match the heat exchange requirements of the battery cell 2011 after its thickness is increased. This improves the heat exchange speed of the heat exchange tube on the battery cell 2011 and enhances the heat exchange effect of the heat exchange tube on the battery cell 2011, thereby achieving rapid heating and rapid cooling of the battery cell 2011. This allows the battery cell 2011 to quickly enter and maintain a suitable temperature range, making the operation of the battery module 200 more stable.

[0206] In the above embodiments, when the thickness of the battery cell 2011 is greater than or equal to 40 mm, the ratio of the heat exchange area of ​​the battery cell 2011 to the wall area is set to greater than or equal to 30%. This allows the heat exchange contact area between the heat exchange tube and the battery cell 2011 to better match the heat exchange requirements of the battery cell 2011 after the thickness is increased. This allows the battery assembly 200 to be better maintained within a suitable temperature range, thereby improving the temperature uniformity of the battery assembly 200 and making the battery 1000 operate more stably.

[0207] In some embodiments of this application, the thickness of the battery cell 2011 in the first direction is greater than or equal to 30 mm and less than 40 mm, and the area of ​​the heat exchange tube projected onto the wall surface can be greater than or equal to 15% of the wall surface area and less than 30% of the wall surface area.

[0208] The thickness of the battery cell 2011 in the first direction is greater than or equal to 30 mm and less than 40 mm. For example, the thickness of the battery cell 2011 can be 30 mm, 31 mm, 32 mm, 33 mm, 34 mm, 35 mm, 36 mm, 37 mm, 38 mm, etc. The ratio of the area of ​​the heat exchange channel projected onto the wall surface to the wall surface area is limited to greater than or equal to 15% and less than 30%. For example, the ratio of the area of ​​the heat exchange tube projected onto the wall surface to the wall surface area can be 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, etc. The ratio of the area of ​​the heat exchange tube projected onto the wall surface to the wall surface area can be arranged accordingly based on the thickness of the battery cell 2011.

[0209] In the above embodiments, when the thickness of the battery cell 2011 is greater than or equal to 30 mm and less than 40 mm, the ratio of the heat exchange area of ​​the battery cell 2011 to the wall area is set to be greater than or equal to 15% and less than 30%. This allows the heat exchange contact area between the heat exchange tube and the battery cell 2011 to be well matched with the heat exchange requirements of the battery cell 2011 after the thickness is increased. This allows the battery assembly 200 to be well maintained within a suitable temperature range, resulting in a more uniform temperature distribution within the battery assembly 200 and more stable operation of the battery 1000.

[0210] In some embodiments of this application, the thickness of the battery cell 2011 in the first direction is greater than or equal to 50 mm, and the area of ​​the heat exchange tube projected onto the wall surface can be greater than or equal to 45% of the wall surface area.

[0211] The thickness of the battery cell 2011 in the first direction is greater than or equal to 50 mm. For example, the thickness of the battery cell 2011 can be 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, 75 mm, 80 mm, 85 mm, 90 mm, 95 mm, 100 mm, 105 mm, etc. The ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area is limited to greater than or equal to 45%. For example, the ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area can be 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, etc. The ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area can be arranged accordingly based on the thickness of the battery cell 2011.

[0212] In the above embodiments, when the thickness of the battery cell 2011 is greater than or equal to 50 mm, the ratio of the heat exchange area of ​​the battery cell 2011 to the wall area is set to greater than or equal to 45%. This allows the heat exchange contact area between the heat exchange tube and the battery cell 2011 to better match the heat exchange requirements of the battery cell 2011 after the thickness is increased. This allows the battery assembly 200 to be better maintained within a suitable temperature range, thereby improving the temperature uniformity of the battery assembly 200 and making the battery 1000 operate more stably.

[0213] In some embodiments of this application, the thickness of the battery cell 2011 in the first direction is greater than or equal to 40 mm and less than 50 mm, and the area of ​​the heat exchange tube projected onto the wall surface can be greater than or equal to 30% of the wall surface area and less than 45% of the wall surface area.

[0214] The thickness of the battery cell 2011 in the first direction is greater than or equal to 40 mm and less than 50 mm. For example, the thickness of the battery cell 2011 can be 40 mm, 41 mm, 42 mm, 43 mm, 44 mm, 45 mm, 46 mm, 47 mm, 48 mm, 49 mm, etc. The ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area is limited to greater than or equal to 30% and less than 45%. For example, the ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area can be 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, etc. The ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area can be arranged accordingly based on the thickness of the battery cell 2011.

[0215] In the above embodiments, when the thickness of the battery cell 2011 is greater than or equal to 40 mm and less than 50 mm, the ratio of the heat exchange area of ​​the battery cell 2011 to the wall area is set to be greater than or equal to 30% and less than 45%. This allows the heat exchange contact area between the heat exchange tube and the battery cell 2011 to be well matched with the heat exchange requirements of the battery cell 2011 after the thickness is increased. This allows the battery assembly 200 to be well maintained within a suitable temperature range, resulting in a more uniform temperature distribution within the battery assembly 200 and more stable operation of the battery 1000.

[0216] In some embodiments of this application, the thickness of the battery cell 2011 in the first direction is greater than or equal to 60 mm, and the area of ​​the heat exchange tube projected onto the wall surface can be greater than or equal to 65% of the wall surface area.

[0217] The thickness of the battery cell 2011 in the first direction is greater than or equal to 60mm. For example, the thickness of the battery cell 2011 can be 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, etc. The ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area is limited to greater than or equal to 65%. For example, the ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area can be 65%, 70%, 75%, 80%, 85%, 90%, 95%, etc. The ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area can be arranged accordingly based on the thickness of the battery cell 2011.

[0218] In the above embodiments, when the thickness of the battery cell 2011 is greater than or equal to 60 mm, the ratio of the heat exchange area of ​​the battery cell 2011 to the wall area is set to greater than or equal to 65%. This allows the heat exchange contact area between the heat exchange tube and the battery cell 2011 to better match the heat exchange requirements of the battery cell 2011 after the thickness is increased. This allows the battery assembly 200 to be better maintained within a suitable temperature range, thereby improving the temperature uniformity of the battery assembly 200 and making the battery 1000 operate more stably.

[0219] In some embodiments of this application, the thickness of the battery cell 2011 in the first direction is greater than or equal to 50 mm and less than 60 mm, and the area of ​​the heat exchange tube projected onto the wall surface can be greater than or equal to 45% of the wall surface area and less than 65% of the wall surface area.

[0220] The thickness of the battery cell 2011 in the first direction is greater than or equal to 50 mm and less than 60 mm. For example, the thickness of the battery cell 2011 can be 50 mm, 51 mm, 52 mm, 53 mm, 54 mm, 55 mm, 56 mm, 57 mm, 58 mm, etc. The ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area is limited to greater than or equal to 45% and less than 65%. For example, the ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area can be 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, etc. The ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area can be arranged accordingly based on the thickness of the battery cell 2011.

[0221] In the above embodiments, when the thickness of the battery cell 2011 is greater than or equal to 50 mm and less than 60 mm, the ratio of the heat exchange area of ​​the battery cell 2011 to the wall area is set to be greater than or equal to 45% and less than 65%. This allows the heat exchange contact area between the heat exchange tube and the battery cell 2011 to be well matched with the heat exchange requirements of the battery cell 2011 after the thickness is increased. This allows the battery assembly 200 to be well maintained within a suitable temperature range, resulting in a more uniform temperature distribution within the battery assembly 200 and more stable operation of the battery 1000.

[0222] In some embodiments of this application, the thickness of the battery cell 2011 in the first direction is greater than or equal to 80 mm, and the area of ​​the heat exchange tube projected onto the wall surface can be greater than or equal to 75% of the wall surface area.

[0223] The thickness of the battery cell 2011 in the first direction is greater than or equal to 80 mm. For example, the thickness of the battery cell 2011 can be 80 mm, 85 mm, 90 mm, 95 mm, 100 mm, 105 mm, etc. The ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area is limited to greater than or equal to 75%. For example, the ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area can be 75%, 80%, 85%, 90%, 95%, etc. The ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area can be arranged accordingly based on the thickness of the battery cell 2011.

[0224] In the above embodiments, when the thickness of the battery cell 2011 is greater than or equal to 80 mm, the ratio of the heat exchange area of ​​the battery cell 2011 to the wall area is set to greater than or equal to 75%. This allows the heat exchange contact area between the heat exchange tube and the battery cell 2011 to better match the heat exchange requirements of the battery cell 2011 after the increase in thickness. This enables the battery assembly 200 to be better maintained within a suitable temperature range, thereby improving the temperature uniformity of the battery assembly 200 and making the battery 1000 operate more stably.

[0225] In some embodiments of this application, the thickness of the battery cell 2011 in the first direction is greater than or equal to 60 mm and less than 80 mm, and the area of ​​the heat exchange tube projected onto the wall surface can be greater than or equal to 65% of the wall surface area and less than 75% of the wall surface area.

[0226] The thickness of the battery cell 2011 in the first direction is greater than or equal to 60 mm and less than 80 mm. For example, the thickness of the battery cell 2011 can be 60 mm, 61 mm, 62 mm, 63 mm, 64 mm, 65 mm, 66 mm, 67 mm, 68 mm, 69 mm, 70 mm, 71 mm, 72 mm, 73 mm, 74 mm, 75 mm, etc. The ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area is limited to greater than or equal to 65% and less than 75%. For example, the ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area can be 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, etc. The ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area can be arranged accordingly based on the thickness of the battery cell 2011.

[0227] In the above embodiments, when the thickness of the battery cell 2011 is greater than or equal to 60 mm and less than 80 mm, the ratio of the heat exchange area of ​​the battery cell 2011 to the wall area is set to greater than or equal to 65% and less than 75%. This allows the heat exchange contact area between the heat exchange tube and the battery cell 2011 to be well matched with the heat exchange requirements of the battery cell 2011 after the thickness is increased. This allows the battery assembly 200 to be well maintained within a suitable temperature range, resulting in a more uniform temperature distribution within the battery assembly 200 and more stable operation of the battery 1000.

[0228] In some embodiments of this application, the thickness of the battery cell 2011 in the first direction is greater than 100 mm, and the area of ​​the heat exchange tube projected onto the wall surface can be greater than or equal to 90% of the wall surface area.

[0229] The thickness of the battery cell 2011 in the first direction is greater than 100mm, for example, the thickness of the battery cell 2011 can be 105mm, 110mm, 115mm, 120mm, 125mm, 130mm, etc. The ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area is limited to greater than or equal to 90%, for example, the ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area can be 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, etc. The ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area can be arranged accordingly based on the thickness of the battery cell 2011.

[0230] In the above embodiments, when the thickness of the battery cell 2011 is greater than 100mm, the ratio of the heat exchange area of ​​the battery cell 2011 to the wall area is set to be greater than or equal to 90%. This allows the heat exchange contact area between the heat exchange tube and the battery cell 2011 to better match the heat exchange requirements of the battery cell 2011 after the thickness is increased. This allows the battery assembly 200 to be better maintained within a suitable temperature range, thereby improving the temperature uniformity of the battery assembly 200 and making the battery 1000 operate more stably.

[0231] In some embodiments of this application, the thickness of the battery cell 2011 in the first direction is greater than or equal to 80 mm and less than or equal to 100 mm, and the area of ​​the heat exchange tube projected onto the wall surface can be greater than or equal to 75% of the wall surface area and less than 90% of the wall surface area.

[0232] The thickness of the battery cell 2011 in the first direction is greater than or equal to 80 mm and less than or equal to 100 mm. For example, the thickness of the battery cell 2011 can be 80 mm, 81 mm, 82 mm, 83 mm, 84 mm, 85 mm, 86 mm, 87 mm, 88 mm, 89 mm, 90 mm, 91 mm, 92 mm, 93 mm, 94 mm, 95 mm, 96 mm, 97 mm, 98 mm, 99 mm, 100 mm, etc. The ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area is limited to greater than or equal to 75% and less than 90%. For example, the ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area can be 75%, 79%, 83%, 87%, etc. The ratio of the area of ​​the heat exchange tube's projected area on the wall to the wall area can be arranged accordingly based on the thickness of the battery cell 2011.

[0233] In the above embodiments, when the thickness of the battery cell 2011 is greater than or equal to 80 mm and less than or equal to 100 mm, setting the ratio of the heat exchange area of ​​the battery cell 2011 to the wall area to be greater than or equal to 75% and less than 90% can make the heat exchange contact area between the heat exchange tube and the battery cell 2011 well matched with the heat exchange requirements of the battery cell 2011 after the increase in thickness, so that the battery assembly 200 can be well maintained in a suitable temperature range, thereby making the temperature distribution in the battery assembly 200 more uniform and the battery 1000 more stable in operation.

[0234] It should be noted that in the above embodiments, the heat exchange contact area between the heat exchange tube and a single battery cell 2011 is designed and determined based on the thickness of the battery cell 2011. In the specific design process, the heating power required for a unit length of battery cell 2011 can be preset first, and the number of battery cells 2011 can be derived based on the heating power, thereby deriving the thickness of the battery cell 2011.

[0235] For example, the required heating power of all battery cells 2011 covered by the heat exchange channel within a unit length (e.g., 1m) is set. Assuming that the side plate on the side where the large surface of the battery cell 2011 shell is located is a fin, the heating power required by the battery cell 2011 within a unit length is approximately the heating power of the fins on the battery cell 2011 within a unit length. Therefore, the required number of fins can be calculated based on the heating power required by the battery cell 2011 within a unit length. Since each battery cell 2011 is equivalent to having exactly two fins, the number of battery cells 2011 within a unit length can be obtained, and thus the thickness of the battery cell 2011 can be obtained.

[0236] In some embodiments of this application, as shown in Figures 4 and 5, the heat exchange channel may include a first heat exchange channel 10, which includes a first heat exchange section 11 and a second heat exchange section 12. The second heat exchange section 12 is bent to form a U-shaped region 120. The first heat exchange section 11 is bent and disposed within the U-shaped region 120 and is bent and connected to the second heat exchange section 12. The battery cells 2011 located at the outermost periphery of the battery assembly 200 form the outer battery cells. At least a portion of the second heat exchange section 12 is attached to the outer battery cells.

[0237] The heat exchange channel includes a first heat exchange channel 10. There may be one or more first heat exchange channels 10. When there are multiple first heat exchange channels 10, the multiple first heat exchange channels 10 can be arranged sequentially along a first direction. The multiple first heat exchange channels 10 can also be arranged sequentially along a third direction (Y direction as shown in Figure 4). Here, the third direction can intersect with the first direction and the second direction. For example, the third direction can intersect the first direction and the second direction perpendicularly or at an acute angle or an obtuse angle. For example, the first direction and the second direction can be arranged at an angle of 30°, 60°, 80°, 120°, 150° or 170°.

[0238] The statement that "the second heat exchange section 12 is bent to form a U-shaped region 120, and the first heat exchange section 11 is bent and disposed within the U-shaped region 120" is intended to illustrate that the second heat exchange section 12 is disposed on the circumferential periphery of the first heat exchange section 11, and can be arranged on the three circumferential sides of the first heat exchange section 11. The second heat exchange section 12 can be arranged closer to the periphery of the battery 1000 relative to the first heat exchange section 11.

[0239] The second heat exchange section 12 is bent to form a U-shaped region 120, that is, in the direction from one end of the second heat exchange section 12 to the other end, the second heat exchange section 12 extends along the lines of the U-shape to form a U-shaped region 120.

[0240] The first heat exchange section 11 is bent within the U-shaped area 120, that is, the first heat exchange section 11 is arranged within the space enclosed by the second heat exchange section 12, and the first heat exchange section 11 extends non-linearly on the inner side of the second heat exchange section 12, having at least one bent position.

[0241] It should be noted that in the above embodiments, only the bending of the first heat exchange section 11 is limited to being located within the U-shaped region 120; the bending form of the first heat exchange section 11 is not limited. That is, the first heat exchange section 11 can be designed according to the heat exchange requirements of the battery 1000. For example, the first heat exchange section 11 can extend along the length direction of the battery cell 2011 (the Y direction as shown in Figure 4), and after extending to a certain length, bend towards the width direction of the battery cell 2011 (the X direction as shown in Figure 4), and then continue to extend along the length direction of the battery cell 2011 and bend along the width direction. Alternatively, the first heat exchange section 11 can extend along the width direction of the battery cell 2011, and after extending to a certain length, bend towards the length direction of the battery cell 2011, and then continue to extend along the width direction of the battery cell 2011 and bend along the length direction.

[0242] The first heat exchange section 11 and the second heat exchange section 12 are connected by bending. That is, one end of the first heat exchange section 11 and one end of the second heat exchange section 12 are connected, and the connection position between the first heat exchange section 11 and the second heat exchange section 12 is a non-linear structure with bending. For example, the connection position between the first heat exchange section 11 and the second heat exchange section 12 can be bent into an arc.

[0243] The first heat exchange section 11 and the second heat exchange section 12 are connected. Thus, one of the ends of the first heat exchange section 11 away from the second heat exchange section 12 and the other end of the second heat exchange section 12 away from the first heat exchange section 11 can be used as the liquid inlet and the other can be used as the liquid outlet. Therefore, when the first heat exchange channel 10 is performing heat exchange, the heat exchange medium can flow from the first heat exchange section 11 to the second heat exchange section 12, or from the second heat exchange section 12 to the first heat exchange section 11.

[0244] The second heat exchange section 12 is bent and connected to the first heat exchange section 11. Since the second heat exchange section 12 is located in the circumference of the first heat exchange section 11, the end of the connection between the first heat exchange section 11 and the second heat exchange section 12 can be located on one side of the first heat exchange section 11 in the first direction or on one side of the third direction. When the heat exchanger 100 is performing heat exchange operation, the heat exchange fluid in the first heat exchange channel 10 can flow from the first heat exchange section 11 of the first heat exchange channel 10 to the second heat exchange section 12, and the heat exchange fluid can also flow from the second heat exchange section 12 to the first heat exchange section 11.

[0245] The outermost battery cell 2011 of the battery module 200 can refer to the battery cell 2011 adjacent to the side wall of the battery 1000, and the battery cell 2011 adjacent to the end plate and other structures in the battery 1000. The outermost battery cell 2011 constitutes the outer battery cell. At least part of the second heat exchange section 12 is in contact with the outer battery cell. The second heat exchange section 12 can be partially in contact with the outer battery cell or in contact with a portion of the outer battery cell. The second heat exchange section 12 can also be completely in contact with the outer battery cell or in contact with a portion of the outer battery cell.

[0246] The first heat exchange section 11 is located within the U-shaped region 120 of the second heat exchange section 12. The second heat exchange section 12 can be located at the outermost circumferential direction of the first heat exchange channel 10. The first heat exchange section 11 can be in contact with the battery cell 2011 located inside the outer battery cell. When the heat exchange component 100 exchanges heat with the battery assembly 200, for example when the battery assembly 200 needs to be cooled, the heat exchange fluid in the first heat exchange channel 10 can flow from the first heat exchange section 11 to the second heat exchange section 12, so that the heat exchange fluid can first cool the battery cell 2011 located inside the outer battery cell in the battery assembly 200, and then the heat exchange fluid flows to the second heat exchange section 12 to cool the battery cell 2011 in the outer battery cell of the battery assembly 200.

[0247] At least a portion of the second heat exchange section 12 is bonded to the outer battery cell. This bonding can mean that the heat exchange tube forming the second heat exchange section 12 is directly bonded to the outer battery cell, or it can mean that the heat exchange tube forming the second heat exchange section 12 is bonded to the outer battery cell indirectly. Similarly, the first heat exchange section 11 can also be directly bonded to or indirectly bonded to the battery cell 2011 in the middle of the battery module 200.

[0248] When the battery assembly 200 needs to be heated, the heat exchange fluid can flow from the second heat exchange section 12 to the first heat exchange section 11, so that the heat exchange fluid can first heat the battery cell 2011 in the outer battery cell of the battery assembly 200, and then the heat exchange fluid flows to the first heat exchange section 11 to heat the battery cell 2011 in the middle of the battery assembly 200.

[0249] Understandably, during operation, the individual battery cells 2011 within the battery 1000 generate heat. The outer battery cells and those in the middle of the battery assembly 200 have different heat dissipation environments. Specifically, the outer battery cells 2011 can dissipate heat relatively easily through the side walls or end plates of the battery 1000, and are less affected by the heat dissipation of adjacent battery cells 2011. However, the battery cells 2011 in the middle of the battery assembly 200 have more difficulty dissipating heat and are more affected by the heat dissipation of adjacent battery cells 2011. This results in different heat dissipation conditions for the battery cells 2011 in different locations within the battery assembly 200, leading to an uneven temperature distribution within the battery 1000 after operation. This makes the battery 1000 less stable during operation and prone to performance degradation.

[0250] For example, uneven temperature distribution within the battery 1000 greatly increases the risk of capacity decay and thermal runaway in one or more battery cells 2011 within the battery module 200 due to excessively high temperatures. Furthermore, adjacent battery cells 2011 may also experience temperature increases and capacity decay due to changes in their heat. This reduces the overall operational stability of the battery 1000 and lowers battery performance, where battery performance refers to performance indicators such as capacity, charge / discharge rate, and voltage of the battery 1000.

[0251] Understandably, as the heat exchange fluid flows through the first heat exchange channel 10, its heat exchange effect gradually decreases. For example, when the heat exchanger 100 cools the battery assembly 200, the heat from the battery cell 2011 is gradually transferred to the heat exchange fluid, causing the temperature of the heat exchange fluid to gradually increase as it flows along the first heat exchange channel 10. The cooling effect of the higher-temperature heat exchange fluid on the battery cell 2011 is poor. Conversely, when the heat exchanger 100 heats the battery assembly 200, the heat in the heat exchange fluid is gradually transferred to the battery cell 2011, causing the temperature of the heat exchange fluid to gradually decrease as it flows along the first heat exchange channel 10. The heating effect of the lower-temperature heat exchange fluid on the battery cell 2011 is poor.

[0252] When the heat exchanger 100 dissipates heat and cools the battery assembly 200, the heat exchange fluid can flow from the first heat exchange section 11 to the second heat exchange section 12 along the first heat exchange channel 10. This allows the battery cells 2011 in the middle of the battery assembly 200 to be cooled first, and then the heat exchange fluid can cool the battery cells 2011 in the outer battery cells. Since the battery cells 2011 in the outer battery cells have better heat dissipation, the higher temperature heat exchange fluid flowing to the second heat exchange section 12 can still meet the heat dissipation needs of the battery cells 2011 in the outer battery cells. This allows both the outer battery cells and the battery cells 2011 in the middle of the battery assembly 200 to obtain a good cooling effect. As a result, the temperatures of the outer battery cells and the battery cells 2011 in the middle of the battery assembly 200 are more consistent after cooling and heat dissipation, making the temperature distribution inside the battery 1000 more uniform.

[0253] When the heat exchanger 100 heats the battery assembly 200, the heat exchange fluid can flow from the second heat exchange section 12 to the first heat exchange section 11 along the first heat exchange channel 10. This allows the battery cells 2011 in the outer battery cells to be heated first, and then the heat exchange fluid can cool the battery cells 2011 in the middle of the battery assembly 200. Since the heat dissipation of the battery cells 2011 in the outer battery cells is better, the temperature of the battery cells 2011 in the outer battery cells is easier to drop. The heat exchange fluid first heats the battery cells 2011 in the outer battery cells, and the higher temperature of the heat exchange fluid can well meet their heating needs.

[0254] Because the heat dissipation of the battery cell 2011 in the middle of the battery module 200 is poor, the lower temperature heat exchange fluid flowing in the first heat exchange section 11 can work well with the heat generated by the battery cell 2011 to meet its heating needs. This allows both the outer battery cells and the battery cell 2011 in the middle of the battery module 200 to obtain a good heating effect. Consequently, the temperature of the outer battery cells and the battery cell 2011 in the middle of the battery module 200 is more consistent after heating, making the temperature distribution within the battery 1000 more uniform.

[0255] In the above embodiment, by providing a first heat exchange channel 10 in the heat exchanger 100, the second heat exchange section 12 of the first heat exchange channel 10 is connected to the first heat exchange section 11, the second heat exchange section 12 is bent to form a U-shaped region 120 and is at least partially attached to the outer battery cell, and the first heat exchange section 11 is located in the U-shaped region, the heat exchanger 100 has a better heat dissipation and cooling effect and a heating effect when performing heat exchange operations on the battery assembly 200, making the temperature distribution inside the battery 1000 more uniform, thereby making the battery 1000 operate more stably and maintain good battery performance.

[0256] In one embodiment of this application, referring to FIG4, the first heat exchange section 11 and the second heat exchange section 12 can be bent in the same plane.

[0257] The first heat exchange section 11 and the second heat exchange section 12 are bent in the same plane. Specifically, the first heat exchange section 11 and the second heat exchange section 12 can be bent in a plane perpendicular to the second direction, and the plane can be parallel to one side surface of the battery assembly 200 in the second direction.

[0258] In the above embodiments, by setting the first heat exchange section 11 and the second heat exchange section 12 to be bent in the same plane, the first heat exchange channel 10 can exchange heat with the battery 1000 in the same plane. This simplifies the structure of the first heat exchange channel 10, reduces the production difficulty of the first heat exchange channel 10, and also reduces the space occupied by the first heat exchange channel 10.

[0259] In one embodiment of this application, as shown in FIG4, the peripheral battery cells may include a first group of battery cells 202, a second group of battery cells 203, and a third group of battery cells 204 arranged adjacent to each other. The first group of battery cells 202 includes a plurality of battery cells 2011 stacked along a first direction, the second group of battery cells 203 includes a plurality of battery cells 2011 stacked along a third direction, and the third group of battery cells 204 includes a plurality of battery cells 2011 stacked along a third direction. The first direction, the second direction, and the third direction are arranged at angles to each other. The second heat exchange section 12 includes a second heat exchange part 121, a third heat exchange part 122, and a fourth heat exchange part 125 connected together. The second heat exchange part 121 extends and adheres to the first group of battery cells 202 to perform heat exchange, and / or the third heat exchange part 122 extends and adheres to the second group of battery cells 203 to perform heat exchange, and / or the fourth heat exchange part 125 extends and adheres to the third group of battery cells 204 to perform heat exchange.

[0260] In this arrangement, multiple battery cells 2011 in the first group of battery cells 202 are stacked along a first direction, that is, the first group of battery cells 202 extends along the first direction. Multiple battery cells 2011 in the second group of battery cells 203 are stacked along a third direction, that is, the second group of battery cells 203 extends along a third direction. The stacking arrangement here can refer to the multiple battery cells 2011 being stacked along the thickness direction of the battery cell 2011, or it can refer to the multiple battery cells 2011 being stacked along the length direction of the battery cell 2011.

[0261] The first group of battery cells 202 is arranged adjacent to the second group of battery cells 203 and the third group of battery cells 204. This can mean that the battery cell 2011 at one end of the first group of battery cells 202 in the first direction can be adjacent to the battery cell 2011 in the second group of battery cells 203 or the third group of battery cells 204, or the battery cell 2011 at one end of the second group of battery cells 203 in the third direction can be adjacent to the battery cell 2011 in the first group of battery cells 202, and the battery cell 1000 at one end of the third group of battery cells 204 in the third direction can be adjacent to the battery cell 2011 in the first group of battery cells 202. The first group of battery cells 202, the second group of battery cells 203 and the third group of battery cells 204 can all be arranged adjacent to the side wall of the battery 1000.

[0262] Specifically, the second heat exchange section 12 is configured to include a second heat exchange part 121, a third heat exchange part 122, and a fourth heat exchange part 125. The second heat exchange part 121 can be attached to the first group of battery cells 202, or the third heat exchange part 122 can be attached to the second group of battery cells 203, or the fourth heat exchange part 125 can be attached to the third group of battery cells 204; or, the second heat exchange part 121 is attached to the first group of battery cells 202 and the third heat exchange part 122 is attached to the second group of battery cells 203, and the fourth heat exchange part 125 is not attached to the third group of battery cells 204.

[0263] Alternatively, the second heat exchange section 121 may be bonded to the first group of battery cells 202 and the fourth heat exchange section 125 may be bonded to the second group of battery cells 203, while the third heat exchange section 122 may not be bonded to the second group of battery cells 203; or the second heat exchange section 121 may be bonded to the first group of battery cells 202 and the third heat exchange section 122 may be bonded to the second group of battery cells 203, while the fourth heat exchange section 125 may be bonded to the third group of battery cells 204.

[0264] The second heat exchange section 121, the third heat exchange section 122, and the fourth heat exchange section 125 in the second heat exchange section 12 can cooperate to form a U-shaped region 120. Specifically, the third heat exchange section 122 and the fourth heat exchange section 125 can be connected to both ends of the second heat exchange section 121 respectively. When the heat exchange fluid flows in the second heat exchange section 12, it can flow along the third heat exchange section 122, the second heat exchange section 121, and the fourth heat exchange section 125. The heat exchange fluid can also flow along the fourth heat exchange section 125, the second heat exchange section 121, and the third heat exchange section 122.

[0265] For example, as shown in Figure 4, the first direction can be the thickness direction of the battery cell 2011, i.e., the X direction as shown in Figure 4, and the second direction can be the length direction of the battery cell 2011, i.e., the Y direction as shown in the figure. Therefore, the multiple battery cells 2011 included in the first group of battery cells 202 are stacked along the thickness direction of the battery cell 2011, the multiple battery cells 2011 included in the second group of battery cells 203 are stacked along the length direction of the battery cell 2011, and the multiple battery cells 2011 included in the third group of battery cells 204 are stacked along the length direction of the battery cell 2011. As shown in Figure 4, the first group of battery cells 202 is arranged at one end of the battery assembly 200 in the Y direction; the second group of battery cells 203 and the third group of battery cells 204 are respectively arranged at both ends of the battery assembly 200 in the X direction.

[0266] When the heat exchanger 100 exchanges heat with the battery assembly 200, for example, when the heat exchanger 100 heats the battery assembly 200, the heat exchange fluid can flow into the second heat exchange section 12 via the fourth heat exchange section 125 and then heat the first group of battery cells 202 and the second group of battery cells 203 in the outer battery cells along the second heat exchange section 121 and the third heat exchange section 122, or the heat exchange fluid can flow into the second heat exchange section 12 via the third heat exchange section 122 and then heat the first group of battery cells 202 and the second group of battery cells 203 in the outer battery cells along the second heat exchange section 121 and the fourth heat exchange section 125. One group of battery cells 202 and the third group of battery cells 204 are heated, or the heat exchange fluid can heat the third group of battery cells 204, the second group of battery cells 203 and the first group of battery cells 202 along the fourth heat exchange section 125, the second heat exchange section 121 and the third heat exchange section 122, or the heat exchange fluid can heat the second group of battery cells 203, the first group of battery cells 202 and the third group of battery cells 204 along the third heat exchange section 122, the second heat exchange section 121 and the fourth heat exchange section 125.

[0267] The heat exchange fluid with a slightly lower temperature flows out to the first heat exchange section 11 to heat the battery cell 2011 located in the middle of the battery assembly 200; when the heat exchange element 100 cools the battery assembly 200, the heat exchange fluid can first flow into the first heat exchange section 11 to cool the battery cell 2011 located in the middle of the battery assembly 200, and the heat exchange fluid with a slightly higher temperature flows into the second heat exchange section 12 to cool the outer battery cells.

[0268] In the above embodiment, by providing a second heat exchange section 121, a third heat exchange section 122, and a fourth heat exchange section 125 in the second heat exchange section 12 to be in contact with the first group of battery cells 202, and / or the second group of battery cells 203, and / or the third group of battery cells 204 in the peripheral battery cells for heat exchange, the heat exchange component 100 can stably and reliably cool or heat the peripheral battery cells, so that the battery assembly 200 can have a good heat exchange effect, thereby making the battery 1000 operate more stably, and when the heat exchange component 100 performs heat exchange operations on the battery assembly 200, the temperature distribution inside the battery 1000 is more uniform.

[0269] In one example of this application, as shown in FIG4, a plurality of first heat exchange sections 111 can be arranged at intervals along a third direction, each of the first heat exchange sections 111 extending in a straight line along a first direction, and the third direction being set at an angle to the first direction.

[0270] The phrase "the third direction and the first direction are arranged at an angle" is intended to illustrate that the third direction and the first direction can be arranged perpendicularly or only intersecting and not perpendicularly. For example, the third direction and the first direction can be arranged at an angle of 30°, 60°, 80°, 120°, 150° or 170°. For example, as shown in Figure 1, the third direction can be the length direction of the battery cell 2011, and the first direction can be the thickness direction of the battery cell 2011. The first heat exchange section 111 extends along the length direction of the battery cell 2011 and is arranged at intervals along the thickness direction of the battery cell 2011. In this way, multiple first heat exchange sections 111 can be bent and connected to form an S-shaped heat exchange channel, which can achieve heat exchange for multiple battery cells 2011.

[0271] In the above embodiment, by setting the first heat exchange section 111 to extend in a straight line along the first direction, the production difficulty of the first heat exchange section 111 can be reduced, thereby reducing the production complexity of the first heat exchange channel 10. At the same time, the straight pipe can also increase the flow velocity of the heat exchange fluid, thereby improving the heat exchange effect of the first heat exchange channel 10.

[0272] In one example of this application, as shown in FIG4, the third heat exchange section 122 and the fourth heat exchange section 125 may be extended along a third direction, and the first heat exchange section 111 and the second heat exchange section 121 may both be extended along a first direction.

[0273] Furthermore, the third heat exchange section 122 and the fourth heat exchange section 125 can both extend in a straight line along the third direction, and the first heat exchange section 111 and the second heat exchange section 121 can both extend in a straight line along the first direction. Among these, the straight-line structure is simple, convenient to manufacture, and easy to arrange, thereby further reducing the manufacturing complexity and cost of the first heat exchange channel 10.

[0274] In the above embodiments, by setting the third heat exchange section 122 and the fourth heat exchange section 125 to extend along the third direction, and the first heat exchange section 111 and the second heat exchange section 121 to extend along the first direction, it is beneficial to arrange the first heat exchange channel 10 in a roundabout way, thereby reducing the production difficulty of the first heat exchange channel 10 and reducing the production cost of the heat exchange component 100; at the same time, this arrangement also makes the structure of the first heat exchange channel more compact and reliable.

[0275] In one example of this application, referring to FIG9, the first heat exchange section 111, the third heat exchange section 122 and the fourth heat exchange section 125 may all extend along the first direction, and the second heat exchange section 121 may extend along the third direction.

[0276] For example, as shown in Figure 9, the third direction is the length direction of the battery cell 2011, i.e., the Y direction shown in the figure, and the first direction is the thickness direction of the battery cell 2011, i.e., the X direction shown in the figure. Thus, the first heat exchange section 111, the third heat exchange section 122, and the fourth heat exchange section 125 extend along the thickness direction of the battery cell 2011. The third heat exchange section 122 and the fourth heat exchange section 125 are respectively arranged on both sides of the battery 1000 in the Y direction for heat exchange with the battery assembly 200 near the side of the battery 1000. The second heat exchange section 121 extends along the length direction of the battery cell 2011 and is arranged at one end of the battery 1000 in the X direction for heat exchange with the battery cell 2011 at one end of the battery 1000 in the X direction.

[0277] Furthermore, the first heat exchange section 111, the third heat exchange section 122, and the fourth heat exchange section 125 extend in a straight line along the first direction, and the second heat exchange section 121 extends in a straight line along the third direction. The straight-line structure is simple, convenient to manufacture, and easy to arrange, thereby further reducing the manufacturing complexity and cost of the first heat exchange channel 10.

[0278] In the above embodiments, by setting the first heat exchange section 111, the third heat exchange section 122 and the fourth heat exchange section 125 to extend along the first direction, and the second heat exchange section 121 to extend along the third direction, it is beneficial to arrange the first heat exchange channel 10 in a roundabout way, thereby reducing the production difficulty of the first heat exchange channel 10 and reducing the production cost of the heat exchange component 100.

[0279] In one example of this application, referring to FIG4, the third heat exchange section 122 and the fourth heat exchange section 125 may both extend along the third direction. In the third direction, the length of the fourth heat exchange section 125 may be less than or equal to the length of the third heat exchange section 122.

[0280] When the length of the fourth heat exchange section 125 is equal to the length of the third heat exchange section 122, the fourth heat exchange section 125, the second heat exchange section 121, and the third heat exchange section 122 are connected in sequence to form a standard U-shaped flow channel. When the length of the fourth heat exchange section 125 is less than the length of the third heat exchange section 122, it is beneficial to avoid other flow channel sections (such as avoiding the first inlet / outlet section 15 shown in Figure 4), other heat exchange channels, or other components, thereby facilitating the layout of the first heat exchange channel 10. For example, as shown in Figure 4, where the length of the fourth heat exchange section 125 is denoted as b1 and the length of the third heat exchange section 122 is denoted as a1, b1 can be less than or equal to a1.

[0281] In the above embodiments, by setting the length of the fourth heat exchange section 125 to be less than or equal to the length of the third heat exchange section 122, the dimensions of the two ends of the U-shaped region 120 can be made close, which is beneficial to controlling the temperature difference of the battery cells 2011 at both ends of the battery assembly 200 in the second direction and improving the temperature uniformity of the battery assembly 200. By setting the length of the fourth heat exchange section 125 to be less than the length of the third heat exchange section 122 in the first direction, it is convenient for the fourth heat exchange section 125 to be connected to the current collector 20, and the fourth heat exchange section 125 can also avoid other flow channel sections, other flow channel structures or other components of the first heat exchange flow channel 10.

[0282] In one example of this application, referring to Figures 4 and 9, the first heat exchange section 111 and the third heat exchange section 122 can extend along a first direction, and the second heat exchange section 121 extends along a third direction. In the first direction, the length of the third heat exchange section 122 is greater than the length of the first heat exchange section 111. For example, in Figure 9, the length of the first heat exchange section 111 is denoted as c1, and the length of the third heat exchange section 122 is denoted as a2, then a2 is greater than c1.

[0283] In the above embodiment, by setting the length of the third heat exchange section 122 to be greater than the length of the first heat exchange section 111 in the first direction, the first heat exchange section 11 can be enclosed within the U-shaped region 120 of the second heat exchange section 12, increasing the length of the third heat exchange section 122 and increasing the heat exchange area of ​​the third heat exchange section 122, so that the second heat exchange section 12 can enclose a larger U-shaped region 120, thereby improving the heat exchange effect of the heat exchange component 100. By setting the length a2 of the third heat exchange section 122 to be equal to the length c1 of the first heat exchange section 111, the length dimensions of the third heat exchange section 122 extending along the first direction of the first heat exchange channel 10 and the plurality of first heat exchange sections 111 are close, which is beneficial to controlling the temperature difference of the battery assembly 200 along the first direction and improving the temperature uniformity of the battery assembly 200.

[0284] In one example of this application, as shown in FIG4, the fourth heat exchange section 125 may extend along a third direction and extend to a position close to the one of the plurality of first heat exchange sections 111 that is furthest from the second heat exchange section 121.

[0285] Specifically, the fourth heat exchange section 125 extends in a third direction. One end of the fourth heat exchange section 125 is connected to the second heat exchange section 121, and the other end of the fourth heat exchange section 125 extends to a position close to the first heat exchange section 111 that is furthest from the second heat exchange section 121. That is, the other end of the fourth heat exchange section 125 extends to be flush with the first heat exchange section 111 that is furthest from the second heat exchange section 121, or the other end of the fourth heat exchange section 125 extends to be close to the first heat exchange section 111 that is furthest from the second heat exchange section 121, or the other end of the fourth heat exchange section 125 extends beyond the first heat exchange section 111 that is furthest from the second heat exchange section 121.

[0286] This increases the length of the fourth heat exchange section 125, increases the heat exchange area between the fourth heat exchange section 125 and the battery assembly 200, further improves the heat exchange effect of the heat exchange component 100, and also benefits the layout of the first heat exchange channel 10.

[0287] In the above embodiment, by providing a fourth heat exchange section 125 that extends along a third direction and extends to a position close to the one of the plurality of first heat exchange sections 111 that is furthest from the second heat exchange section 121, the heat exchange area of ​​the fourth heat exchange section 125 can be increased, so that the first heat exchange channel 10 can exchange heat with the plurality of battery cells 2011 arranged corresponding to the first heat exchange channel 10 as much as possible, thereby improving the heat exchange comprehensiveness of the first heat exchange channel 10 and thus improving the heat exchange effect of the battery 1000.

[0288] In some examples of this application, referring to FIG4, the second heat exchange section 12 may further include a second bend 123 and a third bend 124, both of which are arc-shaped. The second bend 123 is connected between the first end of the third heat exchange section 122 and the second heat exchange section 121, and the third bend 124 is connected between the second end of the third heat exchange section 122 and the first heat exchange section 111.

[0289] Specifically, the second bend 123 is used to connect the second heat exchange section 121 and the third heat exchange section 122, and the third bend 124 is used to connect the third heat exchange section 122 and the first heat exchange section 111. The second bend 123 is arc-shaped, that is, the second bend 123 extends along an arc, and the fluid flow directions at both ends of the second bend 123 have a certain angle. The third bend 124 is arc-shaped, that is, the third bend 124 extends along an arc, and the fluid flow directions at both ends of the third bend 124 have a certain angle.

[0290] Therefore, the second bend 123 and the third bend 124 can change the flow direction of the heat exchange fluid, allowing the second heat exchange section 12 to extend within a preset area and exchange heat with the battery assembly 200. Simultaneously, the arc-shaped second bend 123 and third bend 124 can reduce the flow resistance of the fluid and decrease the pressure drop, thereby increasing the flow rate of the heat exchange fluid and further increasing the heat exchange efficiency of the first heat exchange channel 10. Furthermore, by providing the second bend 123 and third bend 124, a circuitous arrangement of the first heat exchange channel 10 can be achieved, which increases the heat exchange area of ​​the first heat exchange channel 10 and makes its structure more compact, facilitating the miniaturization design of the battery and improving the volumetric energy density of the battery 1000.

[0291] In the above embodiment, by providing the second bend 123 and the third bend 124, the flow direction of the fluid in the first heat exchange channel 10 can be changed, achieving a smooth transition connection between the third heat exchange section 122 and the second heat exchange section 121, and a smooth transition connection between the third heat exchange section 122 and the first heat exchange section 111. As a result, the second bend 123 and the third bend 124 can reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the heat exchange fluid and further increasing the heat exchange efficiency of the first heat exchange channel 10.

[0292] In some specific embodiments of this application, referring to FIG4, the second bend 123 may be in the shape of a quarter circle.

[0293] In other words, the second bend 123 can extend along a semi-circular arc. Specifically, the second bend 123 can extend along a quarter-circular arc away from the protrusion of the first heat exchange section 11. The angle between the inlet and outlet of the second bend 123 can be 90°. The second bend 123 is similar to a 90° elbow in pipe material, which can change the flow direction, so that the flow direction of the heat exchange fluid changes by 90° after passing through the second bend 123. For example, the flow direction of the fluid can be changed from the X direction to the Y direction, or from the Y direction to the X direction. The second bend 123 connects the second heat exchange section 121 and the third heat exchange section 122. At this time, the second heat exchange section 121 and the third heat exchange section 122 are arranged perpendicularly to each other. This makes the layout of the second heat exchange section 12 more regular, and the flow channel of the second heat exchange section 12 can fit the layout of the battery assembly 200 more closely. Thus, the heat exchange effect of the second heat exchange section 12 on the battery assembly 200 can be increased.

[0294] In other embodiments, the bending degree of the second bending portion 123 can be adjusted as needed, for example, it can be 50°, 80°, 120°, 135°, 150°, etc., and the embodiments of this application are not limited thereto.

[0295] In the above embodiment, by setting the second bend 123 to be a quarter-circle arc, the flow direction of the fluid can be changed from the original flow direction to perpendicular to the original flow direction after passing through the second bend 123; at the same time, the arc shape can also reduce the resistance of fluid flow, allowing the fluid to flow smoothly in the second bend 123, effectively preventing the heat exchange efficiency from being reduced due to slow fluid flow.

[0296] In some specific embodiments of this application, referring to FIG4, the third bend 124 may be in the shape of a quarter circle.

[0297] In other words, the third bend 124 can extend along a semi-circular arc. Specifically, the third bend 124 can extend along a quarter-circular arc away from the protrusion of the first heat exchange section 11. It can be understood that the angle between the inlet and outlet of the third bend 124 is 90°. The third bend 124 is similar to a 90° elbow in pipe material, which can change the flow direction, causing the heat exchange fluid to change its flow direction by 90° after passing through the third bend 124. For example, the flow direction can be changed from the X direction to the Y direction, or vice versa. The third bend 124 connects the third heat exchange section 122 and the first heat exchange section 111. At this time, the third heat exchange section 122 and the first heat exchange section 111 are arranged perpendicular to each other. This makes the layout of the first heat exchange channel 10 more regular and allows it to better fit the layout of the battery assembly 200, thereby increasing the heat exchange effect of the first heat exchange channel on the battery assembly 200.

[0298] In other embodiments, the bending degree of the third bending portion 124 can be adjusted as needed, for example, it can be 50°, 80°, 120°, 135°, 150°, etc., and the embodiments of this application are not limited thereto.

[0299] In the above embodiment, by setting the third bend 124 to be a quarter-circle arc, the flow direction of the heat exchange fluid can be changed from the original flow direction to perpendicular to the original flow direction after passing through the third bend 124; at the same time, the arc-shaped third bend 124 can also reduce the resistance to fluid flow, allowing the heat exchange fluid to flow smoothly within the third bend 124, effectively preventing the heat exchange efficiency from being reduced due to the slow flow of the heat exchange fluid.

[0300] In some examples of this application, referring to Figures 10 and 24, the peripheral battery cell may further include a fourth group of battery cells 205. The fourth group of battery cells 205 includes a plurality of battery cells 2011 arranged along a first direction. The second heat exchange section 12 further includes a fifth heat exchange section 127. The fifth heat exchange section 127 closes at least a portion of the opening of the U-shaped region 120 formed by the second heat exchange section 121, the third heat exchange section 122 and the fourth heat exchange section 125. The fifth heat exchange section 127 extends and adheres to the fourth group of battery cells 205 to enable heat exchange.

[0301] The peripheral battery cell also includes a fourth group of battery cells 205. Specifically, the fourth group of battery cells 205 can be arranged at a distance from the first group of battery cells 202 in a third direction. The fourth group of battery cells 205 is located on the side of the battery assembly 200 near the side wall of the battery 1000. The fifth heat exchange section 127 of the second heat exchange section 12 is in contact with the fourth group of battery cells 205. When the heat exchange fluid flows along the second heat exchange section 12, the heat exchange fluid exchanges heat with the fourth group of battery cells 205 along the fifth heat exchange section 127.

[0302] When the heat exchanger 100 exchanges heat with the battery assembly 200, the heat exchange fluid can exchange heat with the battery cells 2011 arranged in the first direction near the side wall of the battery 1000 and the battery cells 2011 arranged in the third direction near the side wall of the battery 1000 along the second heat exchange section 12. The heat exchange fluid then flows into the first heat exchange section 11 to exchange heat with the battery cells 2011 located inside the outer battery cells in the battery assembly 200, or the heat exchange fluid flows in the opposite direction to exchange heat.

[0303] In the above embodiment, by providing a fifth heat exchange section 127 in the second heat exchange section 12 to be in contact with the fourth group of battery cells 205, the second heat exchange section 12 can exchange heat on the four sides of the battery assembly 200. In this way, the heat exchange section 12 of the first heat exchange channel 10 can be used to exchange heat on the four sides of the battery assembly 200, thereby improving the heat exchange effect on the four sides of the battery assembly 200 and improving the temperature uniformity of the battery assembly 200.

[0304] In one example of this application, referring to FIG10, the fifth heat exchange section 127 may be arranged opposite to the second heat exchange section 121. The fifth heat exchange section 127 is connected between the second end of the third heat exchange section 122 and the first heat exchange section 11, and is connected at an angle to the third heat exchange section 122 and at an angle to the first heat exchange section 11.

[0305] It should be noted that, in the above embodiments, the second heat exchange section 121 is arranged on the third direction side of the first heat exchange section 11 (for example, the side of the plurality of first heat exchange sections 111 in Figure 10 that is away from the origin along the Y direction), the fifth heat exchange section 127 is arranged opposite to the second heat exchange section 121, that is, the fifth heat exchange section 127 is arranged on the other side of the first heat exchange section 11 in the third direction (for example, the side of the plurality of first heat exchange sections 111 in Figure 10 that is close to the origin along the Y direction), the third heat exchange section 122 is arranged on the first direction side of the first heat exchange section 11 (for example, the side of the plurality of first heat exchange sections 111 in Figure 10 that is close to the origin along the X direction), and the two ends of the third heat exchange section 122 in the Y direction are respectively connected to the second heat exchange section 121 and the fifth heat exchange section 127.

[0306] The fifth heat exchange section 127 is connected to the third heat exchange section 122 at an angle. For example, the fifth heat exchange section 127 and the third heat exchange section 122 are connected at an angle greater than 0° and less than or equal to 180°. For example, the included angle between the fifth heat exchange section 127 and the third heat exchange section 122 is 30°, 45°, 60°, 90°, 120°, 135°, or 150°, etc. The fifth heat exchange section 127 is also connected to the first heat exchange section 11 at an angle. For example, the fifth heat exchange section 127 and the first heat exchange section 11 are connected at an angle greater than 0° and less than or equal to 180°. For example, the included angle between the fifth heat exchange section 127 and the third heat exchange section 122 is 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0307] Furthermore, the fifth heat exchange section 127 and the third heat exchange section 122 can be connected by an arc segment, for example, the fifth heat exchange section 127 and the third heat exchange section 122 can be connected by a quarter circle arc.

[0308] Furthermore, the fifth heat exchange section 127 and the first heat exchange section 11 can be connected by an arc segment, for example, the fifth heat exchange section 127 and the first heat exchange section 11 can be connected by a semi-circular arc.

[0309] In the above embodiment, by arranging the fifth heat exchange section 127 opposite to the second heat exchange section 121 and connecting the fifth heat exchange section 127 between the third heat exchange section 122 and the first heat exchange segment 11, the structure of the first heat exchange channel 10 can be further optimized according to the heat exchange requirements of the battery assembly 200.

[0310] In one example of this application, referring to FIG12, the fifth heat exchange section 127 and the second heat exchange section 121 can be arranged opposite to each other. One end of the fifth heat exchange section 127 is connected to the end of the fourth heat exchange section 125 away from the second heat exchange section 121, and the fifth heat exchange section 127 and the fourth heat exchange section 125 are connected at an angle.

[0311] The fifth heat exchange section 127 is connected to the fourth heat exchange section 125 at an angle. For example, the fifth heat exchange section 127 and the fourth heat exchange section 125 are connected and arranged at an angle greater than 0° and less than or equal to 180°. For example, the angle between the fifth heat exchange section 127 and the fourth heat exchange section 125 is 30°, 45°, 60°, 90°, 120°, 135° or 150°, etc.

[0312] For example, referring to FIG13, the second heat exchange section 121 and the fifth heat exchange section 127 are respectively arranged on both sides of the first heat exchange section 11 in the X direction, the third heat exchange section 122 and the fourth heat exchange section 125 are respectively arranged on both sides of the first heat exchange section 11 in the Y direction, the fifth heat exchange section 127 extends along the Y direction, the end of the fifth heat exchange section 127 near the origin of the coordinates in the Y direction is connected to the fourth heat exchange section 125, and the end of the fifth heat exchange section 127 away from the origin of the coordinates in the Y direction extends toward the third heat exchange section 13.

[0313] The fifth heat exchange section 127 and the fourth heat exchange section 125 can be connected by an arc, for example, the fifth heat exchange section 127 and the fourth heat exchange section 125 can be connected by a quarter arc.

[0314] In the above embodiment, by arranging the fifth heat exchange section 127 opposite to the second heat exchange section 121 and connecting the fifth heat exchange section 127 to the fourth heat exchange section 125, the structure of the first heat exchange channel 10 can be further optimized according to the heat exchange requirements of the battery assembly 200.

[0315] In the above embodiments, by setting the fifth heat exchange section 127 to be arranged opposite to the second heat exchange section 121, and the fifth heat exchange section 127 is connected between the second end of the third heat exchange section 122 and the first heat exchange section 11, or one end of the fifth heat exchange section 127 is connected to the end of the fourth heat exchange section 125 away from the second heat exchange section 121, so that multiple heat exchange channels can be arranged, thereby meeting the heat exchange requirements of multiple batteries 1000.

[0316] In some examples of this application, referring to FIG4, the first heat exchange section 11 may include a plurality of first heat exchange parts 111, which are arranged at intervals and sequentially bent and connected. At least one battery cell 201 located at both ends in the third direction is a first group of battery cells 202. The second heat exchange part 121 and at least one first heat exchange part 111 of the first heat exchange section 11 are together attached to the first group of battery cells 202 so as to perform heat exchange.

[0317] The first heat exchange section 11 includes multiple first heat exchange parts 111. For example, the first heat exchange section 11 may have two, three, four, five, six, etc. The multiple first heat exchange parts 111 are connected by bending in sequence. That is, the multiple first heat exchange parts 111 are connected in sequence, and the connection position of two connected first heat exchange parts 111 is bent. For example, two connected first heat exchange parts 111 can be bent along a zigzag line or along an arc.

[0318] It should be noted that the shape of the first heat exchange section 111 can be varied, for example, the first heat exchange section 111 can be straight or curved. The extension direction of the first heat exchange section 111 can also be varied, for example, it can extend along the length direction or the thickness direction of the battery cell 2011. In this way, multiple first heat exchange sections 111 are sequentially bent and connected, so that the first heat exchange section 11 can form heat exchange channels in the form of S-shape, Z-shape, V-shape, etc.

[0319] The first heat exchange section 111 can be arranged at intervals and sequentially bent and connected in a first direction. The first heat exchange section 111 can also be arranged at intervals and sequentially connected in a third direction. The first heat exchange section 111 can be in contact with multiple battery cells 201 arranged along the first direction in the battery assembly 200 for heat exchange. When the heat exchange tube exchanges heat with the battery assembly 200, the heat exchange fluid in the first heat exchange channel 10 can flow along multiple first heat exchange sections 111 in the first heat exchange section 11. The heat exchange fluid can be heated or cooled sequentially from the outermost battery cell 201 to the innermost battery cell 201 in the battery assembly 200 in a third direction. The heat exchange fluid can also be heated or cooled sequentially from the innermost battery cell 201 to the outermost battery cell 201 in the battery assembly 200 in the first direction.

[0320] The battery assembly 200 may have one or more battery cells 201 forming a first group of battery cells 202 at both ends in the third direction. The first heat exchange section 11 may have one or more first heat exchange parts 111 attached to the first group of battery cells 202. For example, one first heat exchange part 111 and a second heat exchange part 121 may be attached to the first group of battery cells 202 together, or two, three, four, etc., first heat exchange parts 111 and a second heat exchange part 121 may be attached to the first group together.

[0321] In the above embodiment, by providing multiple first heat exchange sections 111, the heat exchange area of ​​the first heat exchange section 11 can be increased, thereby increasing the heat exchange area of ​​the first heat exchange channel 10 and improving the heat exchange effect of the first heat exchange channel 10. On the other hand, since the internal battery cell 2011 is wrapped by the external battery cell 2011, the temperature difference between the internal battery cells 2011 is not large. Therefore, by providing multiple first heat exchange sections 111, the overall heat exchange effect can be guaranteed while ensuring that the temperature difference between the internal and external battery cells 2011 is small.

[0322] In some specific embodiments of this application, as shown in FIG4, the first heat exchange section 11 may further include: a first bending portion 112, the first bending portion 112 being arc-shaped and bent and connected between two adjacent first heat exchange sections 111.

[0323] The first bend 112 is arc-shaped, meaning it extends along an arc. The fluid flow directions at both ends of the first bend 112 form a certain angle. This allows the first bend 112 to change the fluid flow direction, enabling the two connected first heat exchange sections 111 to extend and arrange within a predetermined area. This increases the heat exchange area of ​​the first heat exchange section 11 and improves its heat exchange efficiency. Furthermore, the arc shape of the first bend 112 reduces fluid flow resistance and pressure drop, thereby increasing the fluid flow rate and further enhancing the heat exchange efficiency of the first heat exchange section 11.

[0324] Furthermore, the number of first bends 112 can be one, two, three, or more. The first bends 112 can allow the first heat exchange flow section to be arranged in a roundabout manner, thereby increasing the heat exchange area of ​​the first heat exchange flow channel 10 and improving the heat exchange efficiency of the first heat exchange flow channel 10.

[0325] In the above embodiment, by providing the first bending portion 112, the fluid flow direction inside the first heat exchange section 11 can be changed, achieving a smooth transition connection between the two first heat exchange sections 111 and realizing the tortuous arrangement of the first heat exchange channel 10. This increases the contact area between a single battery cell 2011 and the first heat exchange channel 10, thereby increasing the heat exchange area and improving the heat exchange efficiency of the first heat exchange channel 10. At the same time, the first bending portion 112 is arc-shaped, which can also reduce the fluid flow resistance and reduce the pressure drop, thereby increasing the fluid flow rate and further increasing the heat exchange efficiency of the first heat exchange section 11.

[0326] In some specific examples of this application, referring to Figure 4, the first bend 112 may be semi-circular.

[0327] In other words, the first bend 112 can extend along a semi-circular arc. Specifically, the first bend 112 can extend along a semi-circular arc protruding away from the direction of the two first heat exchange sections 111 connected by the first bend 112. Specifically, the angle between the inlet and outlet of the first bend 112 is 180°, and the flow directions at the outlet and inlet positions of the first bend 112 are opposite. This brings the two adjacent first heat exchange sections 111 closer together, making the structure of the entire first heat exchange section 11 more compact and reliable. The first bend 112 is used to connect two parallel and spaced-apart first heat exchange sections 111. In other embodiments, the bend angle of the first bend 112 can be adjusted according to requirements, for example, it can be 150°, 135°, etc., and the embodiments of this application do not limit this.

[0328] Two first heat exchange sections 111 are formed into a "U"-shaped heat exchange channel by a first bending section 112. The first heat exchange section 11 may contain one or more "U"-shaped heat exchange channels. Multiple "U"-shaped heat exchange channels are connected in sequence, and the connected "U"-shaped heat exchange channels are connected by the first bending section 112.

[0329] In the above embodiments, by setting the first bending portion 112 to be semi-circular arc, the design diversity of the heat exchange channel can be increased, thereby improving the adaptability of the heat exchange component 100; at the same time, the semi-circular arc structure is relatively simple, thereby reducing the production difficulty of the heat exchange component 100 and increasing the production speed of the heat exchange component 100.

[0330] In one example of this application, referring to FIG25, a plurality of first heat exchange sections 111 of the first heat exchange section 11 may extend along a third direction and be sequentially connected in a first direction.

[0331] The first heat exchange section 111 extends along a third direction. Specifically, multiple battery cells 2011 in the battery unit 201 can be stacked along a first direction. If the battery cells 2011 extend along a third direction, then the extension direction of the first heat exchange section 111 can be the same as the extension direction of the battery cells 2011. When the heat exchange tube exchanges heat with the battery cells 2011, the heat exchange fluid can cool the battery cells 2011 along the first heat exchange section 111 in its extension direction.

[0332] In the above embodiments, by setting the plurality of first heat exchange parts 111 of the first heat exchange section 11 to extend along a third direction and be sequentially connected in the first direction, a single first heat exchange part 111 and a single battery cell 2011 can have a large heat exchange area, so that the heat exchange component 100 can be arranged on the battery assembly 200 in a more convenient and reliable manner to meet the heat exchange area requirements of the battery assembly 200, and the arrangement difficulty of the first heat exchange section 11 can be reduced to a certain extent.

[0333] In one example of this application, as shown in FIG4, a plurality of first heat exchange sections 111 of the first heat exchange section 11 may extend along a first direction and be sequentially connected in a third direction.

[0334] The first heat exchange section 111 extends along a first direction. The first heat exchange section 111 can extend in a curved manner along the first direction, or it can extend in a straight manner along the first direction. As shown in Figure 4, multiple battery cells 2011 are stacked and arranged in the first direction. Since the battery cells 2011 extend along the first direction, one first heat exchange section 111 can span multiple battery cells 2011 in the first direction. The first heat exchange section 111 can exchange heat with multiple battery cells 2011. Multiple first heat exchange sections 111 can cooperate to meet the heat exchange area requirements of a single battery cell 2011.

[0335] In the above embodiments, by arranging multiple first heat exchange sections 111 to extend along a first direction and be sequentially connected in a third direction, the multiple first heat exchange sections 111 can cooperate to exchange heat with a single battery cell 2011 to meet the required heat exchange area. This allows the first heat exchange section 11 to have fewer bends when it is arranged in a bent manner, thereby reducing the flow resistance in the first heat exchange section 11, making the heat exchange fluid flow more smoothly and reducing the pressure drop in the first heat exchange section 11. This allows the heat exchange component 100 to better perform heat exchange operations on the battery assembly 200.

[0336] Referring to Figures 4 and 25, in Figure 4, the first heat exchange section 111 extends along a first direction, that is, the first heat exchange section extends along the thickness direction of the battery cell 2011, and in Figure 25, the first heat exchange section 111 extends along a third direction, that is, the first heat exchange section extends along the length direction of the battery cell 2011. When the length of the first heat exchange section 111 is constant, the first heat exchange section 111 extending along the first direction can exchange heat with more battery cells 2011 compared to the first heat exchange section 111 extending along the third direction. When the number of bends of the first heat exchange section 11 is constant, the distance between two adjacent first heat exchange sections 111 extending along the first direction will be closer than that of the first heat exchange section 111 extending along the third direction, thus the heat exchange effect will be better. When limiting one battery cell 2011 to exchange heat with two heat exchange sections, the number of first heat exchange sections 111 extending along the first direction and arranged along the third direction is lower than the number of first heat exchange sections 111 extending along the third direction and spaced apart along the first direction, that is, fewer bends are required, and thus the molding difficulty of the first heat exchange section 111 is lower and the processing is more convenient.

[0337] Therefore, the first heat exchange section 111 extends along the first direction, which can not only satisfy the heat exchange effect, but also reduce the number of the first heat exchange section 111, thereby reducing the number of bends in the first heat exchange channel 10, reducing the pressure drop of the heat exchange fluid in the first heat exchange channel 10, improving the heat exchange efficiency, and at the same time reducing the molding difficulty and manufacturing cost of the heat exchange component 100, and increasing the production rate of the heat exchange component 100.

[0338] In one example of this application, as shown in FIG4, a plurality of first heat exchange parts 111 of the first heat exchange section 11 can extend along a first direction and be sequentially connected in a third direction. The first end of the third heat exchange part 122 is connected at an angle to the second heat exchange part 121. The second end of the third heat exchange part 122 is connected to the one of the plurality of first heat exchange parts 111 that is farthest from the second heat exchange part 121 along a third direction. The second end of the third heat exchange part 122 is connected at an angle to the first heat exchange section 11.

[0339] The first end of the third heat exchange section 122 is connected to the second heat exchange section 121 at an angle. For example, the first end can be connected to the second heat exchange section 121 at an acute angle, an obtuse angle, or a right angle. The angle between the first end of the third heat exchange section 122 and the second heat exchange section 121 can be reasonably set according to the arrangement of the third heat exchange section 122 and the second heat exchange section 121 in the battery 1000. Similarly, the second end of the third heat exchange section 122 can also be connected to the first heat exchange section 11 at an acute angle, an obtuse angle, or a right angle. The angle between the second end of the third heat exchange section 122 and the first heat exchange section 11 can be reasonably set according to the arrangement of the third heat exchange section 122 and the first heat exchange section 11 in the battery 1000.

[0340] Since the second heat exchange section 121 is in contact with the first group of battery cells 202, the first heat exchange section 111 that is furthest from the second heat exchange section 121 is the first heat exchange section 111 that is furthest from the first group of battery cells 202. The first heat exchange section 111 that is furthest from the second heat exchange section 121 can be in contact with the innermost battery cell 201 in the third direction.

[0341] When the heat exchanger 100 performs heat exchange operations, for example, when the heat exchanger 100 heats the battery assembly 200, the heat exchange fluid can heat the first group of battery cells 202 along the second heat exchange section 121 of the second heat exchange section 12. The heat exchange fluid then flows to the third heat exchange section 122 to heat the second group of battery cells 203. The heat exchange fluid then flows to the first heat exchange section 111 to heat multiple battery cells 2011 in the inner battery cell 201. The heat exchange fluid continues to heat the battery cells 2011 from the inside out in a third direction along the multiple first heat exchange sections 111 in the first heat exchange section 11. When the heat exchanger 100 cools the battery assembly 200, the heat exchange fluid can flow in the opposite direction along the first heat exchange channel 10.

[0342] In the above embodiment, by connecting the third heat exchange section 122 and the second heat exchange section 121 at an angle and connecting the third heat exchange section 122 and the first heat exchange section 11 at an angle, it is more convenient to arrange the second heat exchange section 12 and the first heat exchange section 11 when assembling them in the battery 1000. This can meet the arrangement requirements of the heat exchange component 100 and the battery assembly 200, and the structure is simple and easy to use.

[0343] The first section of the third heat exchange section 122 is connected to the second heat exchange section 121, and the second end is connected to the first heat exchange section 111 that is furthest from the second heat exchange section 121 in a third direction. This allows the heat exchanger 100 to work well with the heat dissipation of the battery assembly 200 at different locations during heat exchange operations, thereby enabling the battery 1000 to achieve a good heat exchange effect.

[0344] It is understandable that when the heat exchange fluid heats the peripheral battery cells in the battery assembly 200, the peripheral battery cells dissipate heat quickly. When the heat exchange fluid flows from the second heat exchange section 121 to the third heat exchange section 122 for heating, the heat exchange fluid needs a higher temperature to meet the heating needs of the peripheral battery cells and the heating needs of other parts in the battery assembly 200. The temperature of the heat exchange fluid in the second heat exchange section 121 is higher. While it can meet the heating needs of the peripheral battery cells well, it is easy to cause overheating after cooperating with other heat exchange sections for heating, resulting in the temperature of the peripheral battery cells being too high, which in turn leads to uneven temperature distribution within the battery 1000.

[0345] In the above embodiment, by connecting the third heat exchange section 122 to the second heat exchange section 121 and the first heat exchange section 111 away from the second heat exchange section 121, the heat exchange fluid can effectively heat the first group of battery cells 202 and the second group of battery cells 203202 along the second heat exchange section 121 and the third heat exchange section 122, so that the peripheral battery cells can obtain a good heating effect. After the temperature drops, the heat exchange fluid flows from the first heat exchange section 111 away from the second heat exchange section 121 to the first heat exchange section 111 close to the second heat exchange section 121, so that the first heat exchange section 111 close to the second heat exchange section 121 can be the part with the lowest temperature of the heat exchange fluid. This can better cooperate with the second heat exchange section 121 for heating operations, reduce the possibility of overheating at the second heat exchange section 121 and causing the temperature to be too high, so that the heat exchanger 100 can better heat the battery 1000 and make the temperature distribution inside the battery 1000 more uniform. Similarly, when the heat exchanger 100 cools the battery assembly 200, the second heat exchanger 121 can also cooperate with the first heat exchanger 111 located near the second heat exchanger 121 to achieve a good cooling effect.

[0346] In the above embodiment, by connecting the third heat exchange section 122 to the second heat exchange section 121 and the first heat exchange section 111 away from the second heat exchange section 121, the heat exchange component 100 can better exchange heat with the battery assembly 200, making the temperature distribution inside the battery 1000 more uniform, thereby enabling the battery 1000 to operate stably and maintain good battery performance.

[0347] In some specific embodiments of this application, as shown in FIG4, the first heat exchange channel 10 may further include: a third heat exchange section 13, which is connected to the end of the first heat exchange section 11 away from the second heat exchange section 12 and is connected to the first heat exchange section 11 at an angle. The third heat exchange section 13 is arranged on the side of the first heat exchange section 11 away from the third heat exchange section 122 and is connected to the one of the plurality of first heat exchange sections 111 that is closest to the second heat exchange section 121 along a third direction.

[0348] The third heat exchange section 13 is connected to the first heat exchange section 11 at an angle, such as an acute angle, an obtuse angle, or a right angle. The third heat exchange section 13 is connected to the first heat exchange section 11 at an angle greater than 0° and less than or equal to 180°. For example, the angle between the third heat exchange section 13 and the first heat exchange section 11 can be 30°, 45°, 60°, 90°, 120°, 135°, or 150°, etc. The third heat exchange section 13 is connected to the end of the first heat exchange section 11 furthest from the second heat exchange section 12. Here, "farthest from" can mean furthest from the second heat exchange section 12 in the extension direction of the first heat exchange section 11. The second heat exchange section 12 is connected to one end of the first heat exchange section 11 through the third heat exchange section 122, and the third heat exchange section 13 is connected to the other end of the first heat exchange section 11.

[0349] When the heat exchanger 100 is heating, the heat exchange fluid can flow sequentially or in opposite directions along the second heat exchange section 12, the first heat exchange section 11, and the third heat exchange section 13 of the first heat exchange channel 10. Specifically, the heat exchange fluid flows in the second heat exchange section 121 of the second heat exchange section 121 towards the third heat exchange section 122 in the first direction. The heat exchange fluid then flows in the third heat exchange section 122 away from the second heat exchange section 121 towards the first heat exchange section 111 in the third direction. The heat exchange fluid then flows in the first heat exchange sections 111 towards the second heat exchange section 121 in the third direction. The heat exchange fluid then flows in the third heat exchange section 13 away from the second heat exchange section 121 in the third direction. Correspondingly, when the heat exchanger 100 is cooling, the heat exchange fluid can flow in the opposite direction.

[0350] Specifically, when the heat exchange fluid flows from the first heat exchange section 11 to the third heat exchange section 13, since the third heat exchange section 13 is connected to the first heat exchange section 111 near the second heat exchange section 121 and is arranged on the side of the first heat exchange section 11 away from the third heat exchange section 122, the heat exchange fluid can flow away from the third heat exchange section 122 in the first heat exchange section 111 near the second heat exchange section 121 in the first direction.

[0351] In the above embodiment, by setting the third heat exchange section 13 to be connected to the first heat exchange section 11 and to be in contact with the second group of battery cells 203, when the heat exchange component 100 exchanges heat with the battery assembly 200, the flow direction of the heat exchange fluid in the second heat exchange section 121 can be opposite to the flow direction of the heat exchange fluid near the second heat exchange section 121, the flow direction of the heat exchange fluid in the third heat exchange section 122 can be opposite to the flow direction of the heat exchange fluid in the first heat exchange section 11, and the flow direction of the heat exchange fluid in the third heat exchange section 13 can be opposite to the flow direction of the heat exchange fluid in the first heat exchange section 11. This allows the second heat exchange section 12, the first heat exchange section 11, and the third heat exchange section 13 to better cooperate in heat exchange operations.

[0352] In the above embodiment, by connecting the third heat exchange section 13 to the first heat exchange section 11 and attaching it to the second group of battery cells 203, the heat exchange component 100 can exchange heat more evenly and well with the battery cells 2011 at different positions in the battery 1000, so that the temperature distribution of the battery 1000 can be more uniform after the heat exchange operation, thereby enabling the battery 1000 to operate more stably and reliably and maintain good battery performance.

[0353] In some specific embodiments of this application, referring to Figures 4 and 22, the battery assembly 200 may further have a fifth group of battery cells 206. Multiple battery cells 2011 of the fifth group of battery cells 206 are stacked along a third direction, and the fifth group of battery cells 206 is arranged adjacent to the third group of battery cells 204. The third heat exchange section 13 and the fourth heat exchange part 125 are both attached to the third group of battery cells 204 to enable heat exchange; or, the third heat exchange section 13 is attached to the fifth group of battery cells 206 to enable heat exchange, and the fourth heat exchange part 125 is attached to the third group of battery cells 204 to enable heat exchange; or, the third heat exchange section 13 is attached to the third group of battery cells 204 to enable heat exchange, and the fourth heat exchange part 125 is arranged on the outer side of the battery assembly 200 in the first direction.

[0354] Among them, the fifth group of battery cells 206 is arranged adjacent to the third group of battery cells 204. Since the third group of battery cells 204 is the outer battery cell, the fifth group of battery cells 206 can be arranged in the first direction on the side of the third group of battery cells 204 that is away from the side wall of the battery 1000. When the heat exchanger 100 is arranged with the battery assembly 200, the fourth heat exchange section 125 can be arranged on the same side of the battery assembly 200 in the first direction as the third heat exchange section 13. Specifically, the fourth heat exchange section 125 can be arranged on the side of the third heat exchange section 13 away from the side wall of the battery 1000. The fourth heat exchange section 125 can cooperate with the third heat exchange section 13 to fit the third group of battery cells 204. The fourth heat exchange section 125 can also fit with the third group of battery cells 204 while the third heat exchange section 13 fits with the fifth group of battery cells 206. The fourth heat exchange section 125 can also be arranged between the side wall of the battery 1000 and the third group of battery cells 204, while the third heat exchange section 13 fits with the third group of battery cells 204.

[0355] In the above embodiment, by cooperating the third heat exchange section 13 and the fourth heat exchange part 125 to fit with the third group of battery cells 204, the heat exchange component 100 and each battery cell 2011 in the third group of battery cells 204 can have a good heat exchange area for heat exchange, so that the third group of battery cells 204 has a good heat exchange effect; the fourth heat exchange part 125 is fitted with the third group of battery cells 204 and the third heat exchange section 13 is fitted with the fifth group of battery cells 206, so that the fourth heat exchange part 125 and the third heat exchange section 13 of the heat exchange component 100 can be arranged more conveniently; the fourth heat exchange part 125 is arranged on the outside of the battery assembly 200 in the first direction, which can facilitate the injection and outflow of heat exchange fluid in the heat exchange component 100.

[0356] In some other embodiments, the third heat exchange section 13 may be attached to the fifth group of battery cells 206 to enable heat exchange, and the fourth heat exchange section 125 may be attached to the third group of battery cells 204 to enable heat exchange.

[0357] Specifically, the third heat exchange section 13 and the fourth heat exchange section 125 both extend along a third direction. When the third direction is the length direction of the battery cell 2011, the contact area between the third heat exchange section 13 and the fourth heat exchange section 31 and the battery cell 2011 can be increased, thereby increasing the heat exchange effect on the fifth group of battery cells 206 and the third group of battery cells 204. At the same time, since the fifth group of battery cells 206 and the third group of battery cells 204 are arranged adjacent to each other, the third heat exchange section 13 and the fifth group of battery cells 206 are in contact to exchange heat, and the fourth heat exchange section 125 and the third group of battery cells 204 are in contact to exchange heat. This also balances the temperature difference caused by the water temperature difference at the edge of the battery assembly 200.

[0358] In some other specific embodiments, the third heat exchange section 13 may be attached to the third group of battery cells 204 to enable heat exchange, and the fourth heat exchange section 125 is arranged on the outer side of the battery assembly 200 in the first direction.

[0359] In other words, the fourth heat exchange section 125 does not exchange heat with the battery assembly 200, and the third heat exchange section 122 extends in the third direction and is in contact with the third group of battery cells 204 for heat exchange. Therefore, when the third direction is the length direction of the battery cell 2011, the contact area between the third heat exchange section 13 and the third group of battery cells 204 can be increased, thereby improving the heat exchange effect of the heat exchange component 100.

[0360] In the above embodiments, by setting the third heat exchange section 13 and the fourth heat exchange section 125 to be in contact with the third group of battery cells 204 for heat exchange, the temperature difference of the third group of battery cells 204 can be balanced, and the temperature uniformity of the third group of battery cells 204 can be improved. By setting the third heat exchange section 13 to be in contact with the third group of battery cells 204 for heat exchange, and the fourth heat exchange section 125 to be arranged on the outer side of the battery assembly 200 in the first direction, the heat exchange process can be simplified and the production difficulty of the heat exchange component 100 can be reduced.

[0361] According to some embodiments of this application, as shown in FIG4, the third heat exchange section 13 extends along a third direction to a position close to the one of the plurality of first heat exchange sections 111 that is furthest from the second heat exchange section 121.

[0362] In the above embodiment, by setting the third heat exchange section 13 to extend along the third direction to a position close to the one of the plurality of first heat exchange sections 111 that is furthest from the second heat exchange section 121, the length of the third heat exchange section 122 can be increased, the heat exchange area of ​​the third heat exchange section 122 can be increased, and the heat exchange effect of the first heat exchange channel 10 can be improved.

[0363] In some specific embodiments of this application, as shown in FIG4, the first heat exchange channel 10 may further include: a fourth bend 14, the fourth bend 14 being arc-shaped and bent and connected between the third heat exchange section 13 and the first heat exchange section 111.

[0364] The fourth bend 14 is arc-shaped, meaning it extends along an arc, and the fluid flow directions at both ends of the fourth bend 14 have a certain angle. This allows the fourth bend 14 to change the fluid flow direction, thereby enabling the third heat exchange section 13 to extend along a predetermined direction. Simultaneously, the arc-shaped flow channel structure reduces fluid flow resistance and pressure drop, thereby increasing the fluid flow rate and further enhancing the heat exchange efficiency of the first heat exchange channel 10.

[0365] In addition, by setting the fourth bend 14, the first heat exchange channel 10 can be arranged in a roundabout manner. This makes the heat exchange area of ​​the first heat exchange channel 10 larger and the structure more compact, which is more conducive to the miniaturization design of the battery 1000 and improves the volumetric energy density of the battery 1000.

[0366] In the above embodiment, by providing the fourth bend 14, the flow direction of the fluid between the third heat exchange section 13 and the first heat exchange section 111 can be changed. At the same time, the arc-shaped fourth bend 14 can reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the fluid and further increasing the heat exchange efficiency of the first heat exchange channel 10.

[0367] In some specific examples of this application, referring to Figure 4, the fourth bend 14 may be in the shape of a quarter circle.

[0368] In other words, the fourth bend 14 can extend along a semi-circular arc. Specifically, the fourth bend 14 can extend along a quarter-circular arc that protrudes towards the connection position of the second heat exchanger 121 and the fourth heat exchanger 125. The angle between the inlet and outlet of the fourth bend 14 is 90°. The fourth bend 14 is similar to a 90° elbow in pipe material, which can change the flow direction, so that the fluid flow direction changes by 90° after passing through the fourth bend 14. For example, the fluid flow direction can be changed from the X direction to the Y direction, or from the Y direction to the X direction.

[0369] Furthermore, the fourth bend 14 connects the third heat exchange section 13 and the first heat exchange section 111, thereby allowing the third heat exchange section 13 and the first heat exchange section 111 to be arranged perpendicular to each other. The first heat exchange section 111 extends along a first direction, and the third heat exchange section 13 extends along a third direction, with the first direction perpendicular to the third direction. This allows for a more regular layout of the first heat exchange channel 10, enabling it to better conform to the layout of the battery module 200, thus increasing the heat exchange effect of the first heat exchange channel on the battery module 200.

[0370] In other embodiments, the bending degree of the fourth bending portion 14 can be adjusted as needed, for example, it can be 50°, 80°, 120°, 135°, 150°, etc., and the embodiments of this application are not limited thereto.

[0371] In the above embodiment, by setting the fourth bend 14 to be a quarter-circle arc, the flow direction of the fluid can be changed from the original flow direction to perpendicular to the original flow direction after passing through the fourth bend 14; at the same time, the arc shape can also reduce the resistance of fluid flow, allowing the fluid to flow smoothly in the fourth bend 14, effectively preventing the heat exchange efficiency from being reduced due to slow fluid flow.

[0372] In one specific embodiment of this application, referring to FIG4, the first heat exchange channel 10 may further include: a first inlet / outlet section 15 and a second inlet / outlet section 17. One end of the first inlet / outlet section 15 is connected at an angle to the third heat exchange section 13, and the other end of the first inlet / outlet section 15 forms the first inlet / outlet of the first heat exchange channel 10. One end of the second inlet / outlet section 17 is connected at an angle to the fourth heat exchange section 125, and the other end of the second inlet / outlet section 17 forms the second inlet / outlet of the first heat exchange channel 10. One of the first inlet / outlet and the second inlet / outlet is the inlet of the first heat exchange channel 10 and the other is the outlet.

[0373] One end of the first inlet / outlet section 15 is connected to the third heat exchange section 13 at an angle. For example, the first inlet / outlet section 15 can be connected to the third heat exchange section 13 at an acute angle, an obtuse angle, a right angle, or a straight angle. Specifically, the first inlet / outlet section 15 is connected to the third heat exchange section 13 and arranged at an angle greater than 0° and less than or equal to 180°. The angle between the first inlet / outlet section 15 and the third heat exchange section 13 is 30°, 45°, 60°, 90°, 120°, 135°, or 150°, etc. Similarly, the second inlet / outlet section 17 can be connected to the fourth heat exchange section 125 at an acute angle, an obtuse angle, a right angle, or a straight angle. Specifically, the first inlet / outlet section 15 is connected to the fourth heat exchange section 125 at an angle greater than 0° and less than or equal to 180°. The included angle between the first inlet / outlet section 15 and the fourth heat exchange section 125 is 30°, 45°, 60°, 90°, 120°, 135°, or 150°, etc. The included angle between the first inlet / outlet section 15 and the third heat exchange section 13, as well as the included angle between the second inlet / outlet section 17 and the fourth heat exchange section 125, can be set and adjusted according to the arrangement requirements.

[0374] When the heat exchange tube exchanges heat with the battery assembly 200, the heat exchange fluid can flow from the first inlet / outlet section 15 into the third heat exchange section 13 and then into the first heat exchange channel 10, or the heat exchange fluid can flow from the third heat exchange section 13 to the first inlet / outlet section 15 and then out of the first heat exchange channel 10 from the first inlet / outlet. The heat exchange fluid can also flow from the second inlet / outlet section 17 into the fourth heat exchange section 125 and then into the first heat exchange channel 10, or the heat exchange fluid can flow from the fourth heat exchange section 125 to the second inlet / outlet section 17 and then out of the second inlet / outlet. The inflow and outflow directions of the heat exchange fluid in the first heat exchange channel 10 can be adjusted or set according to the heat exchange requirements.

[0375] In the above embodiment, by setting the first inlet / outlet section 15 and the second inlet / outlet section 17, it is convenient to connect external pipelines so that the heat exchange fluid can enter or exit the first heat exchange channel 10 from the first inlet / outlet section 15 or the second inlet / outlet section 17. It is also convenient for the heat exchanger 100 to adjust the flow direction of the heat exchange fluid in the first heat exchange channel 10 as needed. The first inlet / outlet section 15 and the second inlet / outlet section 17 have simple structures and are easy to use.

[0376] In a specific example of this application, referring to FIG4, the first inlet / outlet section 15 may extend in a first direction away from the first heat exchange section 11, and the third heat exchange section 13 may extend in a third direction.

[0377] It is understandable that there is a certain angle between the first inlet / outlet section 15 and the third heat exchange section 13. As a result, there will be a certain space on the side of the third heat exchange section 13 facing the first inlet / outlet section 15, which can facilitate the layout of other components within the battery 1000.

[0378] In the above embodiment, by setting the first inlet / outlet section 15 to extend away from the first heat exchange section 11 along the first direction, the pipe layout of the first heat exchange channel 10 can be made more reasonable and it is easier to connect with external pipes; at the same time, the first inlet / outlet can be moved away from the battery assembly 200, which helps to reduce the occurrence of damage to the battery assembly 200 due to water leakage from the first inlet / outlet.

[0379] Furthermore, as shown in Figure 4, the first heat exchange channel 10 may also include a fifth bend 16, which is arc-shaped and bends between the third heat exchange section 13 and the first inlet / outlet section 15.

[0380] The fifth bend 16 is arc-shaped, meaning it extends along an arc and the fluid flow directions at both ends of the fifth bend 16 have a certain angle. This allows for the connection between the third heat exchange section 13 and the first inlet / outlet section 15, enabling the heat exchange fluid to flow smoothly from the third heat exchange section 13 to the first inlet / outlet section 15 or vice versa, thus facilitating liquid inlet or outlet at the first inlet / outlet section 15. Simultaneously, the arc shape reduces fluid flow resistance and pressure drop, thereby increasing the flow rate of the heat exchange fluid and further enhancing the heat exchange efficiency of the first heat exchange channel 10.

[0381] In the above embodiment, by providing the fifth bend 16, the heat exchange fluid can flow smoothly from the third heat exchange section 13 to the first inlet / outlet section 15 or from the first inlet / outlet section 15 to the third heat exchange section 13, realizing liquid inlet or outlet of the first inlet / outlet section 15; at the same time, the arc shape of the fifth bend 16 can also reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the heat exchange fluid and further increasing the heat exchange efficiency of the first heat exchange channel 10.

[0382] Furthermore, referring to Figure 4, the fifth bend 16 can be arc-shaped, and the central angle corresponding to the fifth bend 16 is greater than or equal to 90° and less than 180°.

[0383] For example, the central angle corresponding to the fifth bend 16 can be 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, etc.

[0384] As shown in Figure 4, the heat exchanger 100 includes two first heat exchange channels 10. The fifth bend 16 of the first heat exchange channel 10 located on the side of the battery assembly 200 facing the origin in the Y direction is in the shape of a quarter-circle arc. The third heat exchange section 13 is arranged perpendicularly to the first inlet / outlet section 15. Meanwhile, the first inlet / outlet section 15 of the lower first heat exchange channel 10 may include a first extension section and a second extension section. The first extension section connects the second extension section and the third heat exchange section 13. The first extension section extends along a straight line inclined relative to the first direction, and the second extension section extends along a straight line parallel to the first direction. The first extension section and the third heat exchange section 13 are connected by the fifth bend 16. The central angle corresponding to the arc of the fifth bend 16 is greater than 90° and less than 135°.

[0385] In the above embodiment, by setting the fifth bend 16 to be arc-shaped, the resistance to fluid flow can be further reduced, allowing the fluid to flow smoothly within the fifth bend 16, effectively preventing the heat exchange efficiency from decreasing due to slow fluid flow. At the same time, the central angle corresponding to the fifth bend 16 is greater than or equal to 90° and less than 180°, which can also form a certain space on the side of the third heat exchange section 13 facing the first inlet / outlet section 15, thereby facilitating the arrangement of other components within the battery 1000 and improving the layout rationality of the battery 1000.

[0386] Furthermore, as shown in Figure 4, the second heat exchange section 12 may also include a sixth bend 126, which may be arc-shaped and connected between the fourth heat exchange section 125 and the second heat exchange section 121.

[0387] The sixth bend 126 is arc-shaped, meaning it extends along an arc and the fluid flow directions at both ends of the sixth bend 126 form a certain angle. This allows the sixth bend 126 to change the flow direction of the heat exchange fluid, thereby enabling the second heat exchange section 121 and the fourth heat exchange section 125 to extend along a predetermined direction. Simultaneously, the arc-shaped sixth bend 126 reduces fluid flow resistance and pressure drop, thereby increasing the flow rate of the heat exchange fluid and further enhancing the heat exchange efficiency of the first heat exchange channel 10.

[0388] In the above embodiment, by providing the sixth bend 126, the flow direction of the fluid in the first heat exchange channel 10 can be changed, realizing the tortuous arrangement of the first heat exchange channel 10. This increases the heat exchange area of ​​the first heat exchange channel 10 and improves its heat exchange efficiency. At the same time, the sixth bend 126 is arc-shaped, which can reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the heat exchange fluid and further increasing the heat exchange efficiency of the first heat exchange channel 10.

[0389] In addition, by setting the sixth bend 126, the second heat exchange section 12 can form a U-shaped region 120, thereby enabling the second heat exchange section 12 to surround the first heat exchange section 11, which can increase the compactness of the arrangement of the first heat exchange channel 10, realize the miniaturization of the structure of the first heat exchange channel 10, and help improve the volumetric energy density of the battery.

[0390] Furthermore, referring to Figure 4, the sixth bend 126 can be in the shape of a quarter circle.

[0391] In other words, the sixth bend 126 can extend along a semi-circular arc, specifically, it can extend along a quarter-circular arc away from the protrusion of the first heat exchange section 11. The angle between the inlet and outlet of the sixth bend 126 is 90°. The sixth bend 126 is similar to a 90° elbow in pipe materials, which can change the flow direction, causing the fluid flow direction to change by 90° after passing through the sixth bend 126. For example, the flow direction can be changed from the X direction to the Y direction, or vice versa. The sixth bend 126 connects the second heat exchange section 121 and the fourth heat exchange section 125, which are arranged perpendicularly. This makes the layout of the second heat exchange section 12 more regular, allowing it to better fit the layout of the battery assembly 200, thereby increasing the heat exchange effect of the second heat exchange section 12 on the battery assembly 200.

[0392] In other embodiments, the bending degree of the sixth bend 126 can be adjusted as needed, for example, it can be 50°, 80°, 120°, 135°, 150°, etc., and the embodiments of this application are not limited thereto.

[0393] In the above embodiment, by setting the sixth bend 126 to be a quarter-circle arc, the flow direction of the fluid can be changed from the original flow direction to perpendicular to the original flow direction after passing through the sixth bend 126; at the same time, the arc shape can further reduce the resistance to fluid flow, allowing the fluid to flow smoothly in the sixth bend 126, effectively preventing the heat exchange efficiency from being reduced due to slow fluid flow.

[0394] In a specific example of this application, as shown in FIG4, the second inlet / outlet section 17 extends in a first direction away from the first heat exchange section 11, and the fourth heat exchange section 125 extends in a third direction.

[0395] It is understandable that a certain angle is formed between the second inlet / outlet section 17 and the fourth heat exchange section 125. As a result, a certain space is formed on the side of the fourth heat exchange section 125 facing the second inlet / outlet section 17, which is beneficial for the layout of other components within the battery 1000.

[0396] In the above embodiment, by setting the second inlet / outlet section 17 to extend away from the first heat exchange section 11 along the first direction, the pipe layout of the first heat exchange channel 10 can be made more reasonable and it is easier to connect with external pipes; at the same time, the second inlet / outlet can be moved away from the battery assembly 200, which helps to reduce the occurrence of damage to the battery assembly 200 due to water leakage at the second inlet / outlet.

[0397] Furthermore, as shown in Figure 4, the first heat exchange channel 10 may also include a seventh bend 18, which is arc-shaped and bends between the fourth heat exchange section 125 and the second inlet / outlet section 17.

[0398] The seventh bend 18 is arc-shaped, meaning it has a certain included angle. This bend connects the fourth heat exchange section 125 and the second inlet / outlet section 17, enabling communication between them. This allows the heat exchange fluid to flow smoothly from the fourth heat exchange section 125 to the second inlet / outlet section 17 or vice versa, facilitating liquid inlet or outlet at the second inlet / outlet section 17. Simultaneously, the arc-shaped flow channel structure reduces fluid flow resistance and pressure drop, thereby increasing the flow rate of the heat exchange fluid and further enhancing the heat exchange efficiency of the first heat exchange channel 10.

[0399] In the above embodiment, by providing the seventh bend 18, the heat exchange fluid can flow smoothly from the fourth heat exchange section 125 to the second inlet / outlet section 17 or from the second inlet / outlet section 17 to the fourth heat exchange section 125, realizing liquid inlet or outlet of the second inlet / outlet section 17; at the same time, the arc shape of the seventh bend 18 can also reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the heat exchange fluid and further increasing the heat exchange efficiency of the first heat exchange channel 10.

[0400] Furthermore, as shown in Figure 4, the seventh bend 18 is arc-shaped, and the central angle corresponding to the seventh bend 18 is greater than or equal to 90° and less than 180°.

[0401] For example, the central angle corresponding to the seventh bend 18 can be 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160° or 170°, etc.

[0402] As shown in Figure 4, the heat exchanger 100 includes two first heat exchange channels 10. The seventh bend 18 of the first heat exchange channel 10 located on the side of the battery assembly 200 facing the origin in the Y direction is in the shape of a quarter-circle arc. The fourth heat exchange section 125 is arranged perpendicularly to the second inlet / outlet section 17. Meanwhile, the second inlet / outlet section 17 of the lower first heat exchange channel 10 includes a third extension section and a fourth extension section. The third extension section connects the fourth extension section and the fourth heat exchange section 125. The third extension section extends along a straight line inclined relative to the third direction, and the fourth extension section extends along a straight line parallel to the third direction. The third extension section and the fourth heat exchange section 125 are connected by the seventh bend 18. The central angle corresponding to the arc of the seventh bend 18 is greater than 90° and less than 135°.

[0403] In the above embodiment, by setting the seventh bend 18 to be arc-shaped, the resistance to fluid flow can be further reduced, allowing the fluid to flow smoothly within the seventh bend 18, effectively preventing the heat exchange efficiency from decreasing due to slow fluid flow; at the same time, the central angle corresponding to the seventh bend 18 is greater than or equal to 90° and less than 180°, which can also form a clearance space on the side of the fourth heat exchange section 125 facing the second inlet / outlet section 17, thereby facilitating the layout of other components within the battery 1000 and improving the rationality of the battery 1000 layout.

[0404] In some examples of this application, referring to Figures 4 and 5, the first heat exchange section 11 may include a plurality of first heat exchange parts 111, which are spaced apart and sequentially bent and connected. The plurality of first heat exchange parts 111 and the second heat exchange parts 121 both extend along a first direction and are spaced apart in a third direction. A battery cell 201 is attached to a second heat exchange part 121 and at least one first heat exchange part 111 to enable heat exchange; or, a battery cell 201 is attached to at least two first heat exchange parts 111 to enable heat exchange.

[0405] In the first heat exchange section 11, multiple first heat exchange parts 111 are provided. For example, two, three, four, five, six, etc., can be provided for the first heat exchange parts 111. The multiple first heat exchange parts 111 can extend in a straight line in the first direction. The multiple first heat exchange parts 111 can be arranged at intervals in the third direction. The second heat exchange parts 121 can be arranged parallel to the first heat exchange parts 111 at intervals. The battery unit 201 can be attached to one second heat exchange part 121 and one first heat exchange part 111. The battery unit 201 can also be attached to one second heat exchange part 121 and multiple first heat exchange parts 111. The battery unit 201 can also be attached to two or more first heat exchange parts 111.

[0406] In this configuration, one battery cell 201 is attached to one second heat exchange section 121 and at least one first heat exchange section 111, or one battery cell 201 is attached to at least two first heat exchange sections 111. This allows the heat exchange component 100 to more easily meet the heat exchange area requirements of each battery cell 2011 in the battery cell 201. The first heat exchange section 111 and the second heat exchange section 121 both extend along the first direction and are arranged at intervals in the third direction. This makes it easier to arrange the heat exchange component 100 within the battery 1000 and makes the overall structure of the first heat exchange section 11 and the second heat exchange section 12 in the first heat exchange channel 10 more compact.

[0407] In some embodiments of this application, the total number of the first heat exchange section 111 and the second heat exchange section 121 of the first heat exchange channel 10 is greater than or equal to 4.

[0408] For example, the total number of the first heat exchange section 111 and the second heat exchange section 121 of the first heat exchange channel 10 can be 4, 5, 6, 7 or more.

[0409] In the above embodiment, by setting the total number of first heat exchange sections 111 and second heat exchange sections 121 of the first heat exchange channel 10 to be greater than or equal to 4, the length of each heat exchange channel can be increased, the total number of heat exchange channels can be reduced, and the sealing performance of the heat exchange component 100 can be improved.

[0410] In one example of this application, as shown in FIG4, the number of first heat exchange channels 10 can be two. Each first heat exchange channel 10 includes: three first heat exchange sections 111, one second heat exchange section 121, one third heat exchange section 122, one fourth heat exchange section 125, and one third heat exchange segment 13. The number of battery cells 201 is four. The battery cell 201 located at the third-direction end is in contact with one first heat exchange section 111 and one second heat exchange section 121 to enable heat exchange. Any other battery cell 201 is in contact with two first heat exchange sections 111 to enable heat exchange. The battery assembly 200 also has a fifth group of batteries. The fifth group of battery cells 206 has multiple battery cells 2011 stacked along a third direction, and the fifth group of battery cells 206 is arranged adjacent to the third group of battery cells 204. The third heat exchange section 122 is connected to the second heat exchange section 121 and the first heat exchange section 111 which is farthest from the second heat exchange section 121, and is attached to the second group of battery cells 203 to enable heat exchange. The third heat exchange section 13 is connected to the first heat exchange section 111 which is closest to the second heat exchange section 121, and is attached to the fifth group of battery cells 206 to enable heat exchange. The fourth heat exchange section 125 is attached to the third group of battery cells 204 to enable heat exchange.

[0411] The battery assembly 200 includes two first heat exchange channels 10, which can be arranged at intervals in the third direction. Each heat exchange channel can be in contact with two battery cells 201 for heat exchange. The two first heat exchange channels 10 can be arranged symmetrically in the third direction. The battery assembly 200 includes four battery cells 201, which can extend along a first direction and be arranged sequentially in the third direction. Specifically, each battery cell 201 can contain 30 battery cells 2011. The battery cells 2011 in the battery cell 201 can be stacked in the third direction, and the thickness direction of the battery cells 2011 is the same as that in the third direction. Among them, the battery cell 201 in the third direction near the side wall of the battery 1000 can be formed as the first group of battery cells 202 in the peripheral battery cells of the battery assembly 200. Among the two battery cells 201 arranged in sequence along the third direction, the four battery cells 2011 in the first direction near the side wall of the battery 1000 can be formed as the second group of battery cells 203 and the third group of battery cells 204 in the peripheral battery cells, respectively. The fifth group of battery cells 206 is arranged along the third direction and is located on the side of the third group of battery cells 204 facing the second group of battery cells 203 in the first direction.

[0412] The first heat exchange section 11 is provided with three first heat exchange parts 111. The three first heat exchange parts 111 extend along a first direction and are arranged at intervals in a third direction. Two of the first heat exchange parts 111 arranged at intervals in the third direction are in contact with the battery cell 201 close to the first group of battery cells 202 in the third direction. The other first heat exchange part 111 is in contact with the first group of battery cells 202. The second heat exchange part 121 in the second heat exchange section 12 is arranged between the first heat exchange part 111 and the side wall of the battery 1000. The second heat exchange part 121 is in contact with the first group of battery cells 202. The third heat exchange part 122 extends along a third direction and is in contact with the second group of battery cells 203. The third heat exchange section 13 extends along a third direction and is located on the side of the first heat exchange section 11 away from the third heat exchange part 122 in the first direction. The third heat exchange section 13 can be in contact with the fifth group of battery cells 206. The fourth heat exchange part 125 is in contact with the third group of battery cells 204.

[0413] In the above embodiment, by setting two first heat exchange channels 10 to exchange heat with the battery assembly 200, the structure is simple and the arrangement is convenient. It can improve the heat exchange efficiency of the heat exchanger 100 to a certain extent, so that the heat exchanger 100 can better perform heat exchange operations on the battery assembly 200. The first heat exchange channel 10 is provided with three first heat exchange sections 111, one second heat exchange section 121, one third heat exchange section 122, one fourth heat exchange section 125 and one third heat exchange section 13. This allows the first heat exchange channel 10 to have sufficient heat exchange area to meet the heat exchange requirements and improve the heat exchange rate after cooperating with the two battery units 201.

[0414] In the first heat exchange channel 10, the first heat exchange section 11, the second heat exchange section 12, and the third heat exchange section 13 are arranged as described above. This arrangement allows the heat exchange component 100 to work well with the heat exchange conditions of the battery cells 2011 at different locations within the battery 1000 during heat exchange operations. This results in a more uniform heat exchange effect for the battery cells 2011 at different locations within the battery assembly 200, leading to a more uniform temperature distribution within the battery 1000 during heat exchange operations. Consequently, the battery 1000 operates more stably and maintains good battery performance.

[0415] In one example of this application, as shown in FIG5, the number of first heat exchange channels 10 can be two. Each first heat exchange channel 10 may include: five first heat exchange sections 111, one second heat exchange section 121, one third heat exchange section 122, one fourth heat exchange section 125, and one third heat exchange segment 13. The number of battery cells 201 is four. The battery cell 201 located at the third-direction end is attached to two first heat exchange sections 111 and one second heat exchange section 121 to enable heat exchange. Any remaining battery cell 201 is attached to three first heat exchange sections 111 to enable heat exchange. The battery assembly 200 also has a fifth... The fifth group of battery cells 206 has multiple battery cells 2011 stacked along a third direction, and the fifth group of battery cells 206 is arranged adjacent to the third group of battery cells 204. The third heat exchange section 122 is connected to the second heat exchange section 121 and the first heat exchange section 111 that is farthest from the second heat exchange section 121, and is in contact with the second group of battery cells 203 to enable heat exchange. The third heat exchange section 13 is connected to the first heat exchange section 111 that is closest to the second heat exchange section 121, and is in contact with the fifth group of battery cells 206 to enable heat exchange. The fourth heat exchange section 125 is in contact with the third group of battery cells 204 to enable heat exchange.

[0416] The battery assembly 200 includes two first heat exchange channels 10, which are spaced apart in a third direction. Each heat exchange channel can be in contact with two battery cells 201 for heat exchange. The two first heat exchange channels 10 can be arranged symmetrically in a third direction. The battery assembly 200 includes four battery cells 201, which can extend along a first direction and be arranged sequentially in a third direction. Specifically, each battery cell 201 can contain 30 battery cells 2011. Multiple battery cells 2011 in the battery cell 201 can be stacked along the first direction, and the thickness direction of the battery cells 2011 is the same as that of the first direction. Among them, the battery cell 201 in the third direction near the side wall of the battery 1000 can be formed as the first group of battery cells 202 in the peripheral battery cells of the battery assembly 200. Among the two battery cells 201 arranged in sequence along the third direction, the four battery cells 2011 in the first direction near the side wall of the battery 1000 can be formed as the second group of battery cells 203 and the third group of battery cells 204 in the peripheral battery cells, respectively. The fifth group of battery cells 206 is arranged along the third direction and is located on the side of the third group of battery cells 204 facing the second group of battery cells 203 in the first direction.

[0417] The first heat exchange section 11 is provided with five first heat exchange parts 111. The five first heat exchange parts 111 extend along a first direction and are spaced apart in a third direction. Three of the first heat exchange parts 111 arranged in a third direction are in contact with the battery cell 201 that is close to the first group of battery cells 202 in the third direction. The other two first heat exchange parts 111 can be in contact with the first group of battery cells 202. The second heat exchange part 121 in the second heat exchange section 12 is arranged between the first heat exchange part 111 and the side wall of the battery 1000. The second heat exchange part 121 is in contact with the first group of battery cells 202. The third heat exchange part 122 extends along a third direction and is in contact with the second group of battery cells 203. The third heat exchange section 13 extends along a third direction and is located on the side of the first heat exchange section 11 away from the third heat exchange part 122 in the first direction. The third heat exchange section 13 can be in contact with the fifth group of battery cells 206. The fourth heat exchange part 125 is in contact with the third group of battery cells 204.

[0418] In the above embodiment, by setting two first heat exchange channels 10 to exchange heat with the battery assembly 200, the structure is simple and the arrangement is convenient. It can improve the heat exchange efficiency of the heat exchanger 100 to a certain extent, so that the heat exchanger 100 can better exchange heat with the battery assembly 200. The first heat exchange channel 10 is provided with five first heat exchange sections 111, one second heat exchange section 121, one third heat exchange section 122, one fourth heat exchange section 125 and one third heat exchange section 13. This allows the first heat exchange channel 10 to have sufficient heat exchange area to meet the heat exchange requirements and improve the heat exchange rate after cooperating with the two battery units 201.

[0419] In the first heat exchange channel 10, the first heat exchange section 11, the second heat exchange section 12, and the third heat exchange section 13 are arranged as described above. This arrangement allows the heat exchange component 100 to work well with the heat exchange conditions of the battery cells 2011 at different locations within the battery 1000 during heat exchange operations. This results in a more uniform heat exchange effect for the battery cells 2011 at different locations within the battery assembly 200, leading to a more uniform temperature distribution within the battery 1000 during heat exchange operations. Consequently, the battery 1000 operates more stably and maintains good battery performance.

[0420] In one example of this application, referring to FIG26, the number of first heat exchange channels 10 can be two. Each first heat exchange channel 10 may include: five first heat exchange sections 111, one second heat exchange section 121, one third heat exchange section 122, one fourth heat exchange section 125, and one third heat exchange segment 13. The number of battery cells 201 is six. The battery cell 201 located at the third-direction end is in contact with one first heat exchange section 111 and one second heat exchange section 121 to enable heat exchange. Any remaining battery cell 201 is in contact with two first heat exchange sections 111 to enable heat exchange. The battery assembly 200 also has a third heat exchange section 13. Five groups of battery cells 206 are arranged in a stacked manner along a third direction. The fifth group of battery cells 206 is arranged adjacent to the third group of battery cells 204. The third heat exchange section 122 is connected to the second heat exchange section 121 and the first heat exchange section 111 which is farthest from the second heat exchange section 121, and is attached to the second group of battery cells 203 to enable heat exchange. The third heat exchange section 13 is connected to the first heat exchange section 111 which is closest to the second heat exchange section 121, and is attached to the fifth group of battery cells 206 to enable heat exchange. The fourth heat exchange section 125 is attached to the third group of battery cells 204 to enable heat exchange.

[0421] The battery assembly 200 includes two first heat exchange channels 10, which are spaced apart in a third direction. Each heat exchange channel can be in contact with two battery cells 201 for heat exchange. The two first heat exchange channels 10 can be arranged symmetrically in a third direction. The battery assembly 200 includes four battery cells 201, which can extend along a first direction and be arranged sequentially in a third direction. Specifically, each battery cell 201 can contain 30 battery cells 2011. Multiple battery cells 2011 in the battery cell 201 can be stacked along the first direction, and the thickness direction of the battery cells 2011 is the same as that of the first direction. Among them, the battery cell 201 in the third direction near the side wall of the battery 1000 can be formed as the first group of battery cells 202 in the peripheral battery cells of the battery assembly 200. Among the two battery cells 201 arranged in sequence along the third direction, the four battery cells 2011 in the first direction near the side wall of the battery 1000 can be formed as the second group of battery cells 203 and the third group of battery cells 204 in the peripheral battery cells, respectively. The fifth group of battery cells 206 is arranged along the third direction and is located on the side of the third group of battery cells 204 facing the second group of battery cells 203 in the first direction.

[0422] The first heat exchange section 11 is provided with five first heat exchange parts 111. The five first heat exchange parts 111 extend along a first direction and are spaced apart in a third direction. Three of the first heat exchange parts 111 arranged in a third direction are in contact with the battery cell 201 that is close to the first group of battery cells 202 in the third direction. The other two first heat exchange parts 111 can be in contact with the first group of battery cells 202. The second heat exchange part 121 in the second heat exchange section 12 is arranged between the first heat exchange part 111 and the side wall of the battery 1000. The second heat exchange part 121 is in contact with the first group of battery cells 202. The third heat exchange part 122 extends along a third direction and is in contact with the second group of battery cells 203. The third heat exchange section 13 extends along a third direction and is located on the side of the first heat exchange section 11 away from the third heat exchange part 122 in the first direction. The third heat exchange section 13 can be in contact with the fifth group of battery cells 206. The fourth heat exchange part 125 is in contact with the third group of battery cells 204.

[0423] In the above embodiment, by setting two first heat exchange channels 10 to exchange heat with the battery assembly 200, the structure is simple and the arrangement is convenient. It can improve the heat exchange efficiency of the heat exchanger 100 to a certain extent, so that the heat exchanger 100 can better exchange heat with the battery assembly 200. The first heat exchange channel 10 is provided with five first heat exchange sections 111, one second heat exchange section 121, one third heat exchange section 122, one fourth heat exchange section 125 and one third heat exchange section 13. This allows the first heat exchange channel 10 to have sufficient heat exchange area to meet the heat exchange requirements and improve the heat exchange rate after cooperating with the two battery units 201.

[0424] In the first heat exchange channel 10, the first heat exchange section 11, the second heat exchange section 12, and the third heat exchange section 13 are arranged as described above. This arrangement allows the heat exchange component 100 to work well with the heat exchange of the battery cells 2011 at different locations within the battery 1000 during heat exchange operations. This results in a more uniform heat exchange effect for the battery cells 2011 at different locations within the battery assembly 200, leading to a more uniform temperature distribution within the battery 1000 during heat exchange operations. Consequently, the battery 1000 operates more stably and maintains good performance.

[0425] According to some embodiments of this application, the number of battery cells 201 can be from 2 to 8.

[0426] For example, the number of battery cells 201 can be 2, 3, 4, 5, 6, 7 or 8.

[0427] In the above embodiments, by setting the number of battery cells 201 to 2 to 8, it is beneficial to the overall design of battery 1000 and heat exchanger 100, reduces the production difficulty of heat exchanger 100 and battery 1000, and at the same time, it can also increase the applicability of battery 1000 and improve the market competitiveness of battery 1000.

[0428] In one example of this application, referring to Figure 4, the number of individual battery cells 2011 in each battery cell 201 can be 30.

[0429] Referring to Figure 4, each of the four battery units 201 in the figure can be equipped with 30 individual battery cells 2011.

[0430] In the above embodiment, each battery cell 201 is provided with 30 battery cells 2011, which can better meet the usage needs of the battery 1000.

[0431] In one embodiment of this application, referring to FIG4, the first heat exchange section 11 may be connected downstream of the second heat exchange section 12 along the fluid flow direction.

[0432] In other words, the heat exchange fluid first flows through the second heat exchange section 12 and then flows into the first heat exchange section 11. The second heat exchange section 12 is arranged around the first heat exchange section 11. When the first heat exchange channel 10 exchanges heat with the battery module 200, the peripheral temperature of the battery module 200 dissipates heat quickly, especially under low temperature heating conditions. The high temperature heat exchange fluid starts to exchange heat from the second heat exchange section 12, which allows the first heat exchange channel 10 to preferentially exchange heat on the outer circumference of the battery module 200. This helps to improve the temperature difference between the inside and outside of the battery module 200 and, to a certain extent, improve the service life of the battery 1000.

[0433] In the above embodiment, by setting the first heat exchange section 11 to be connected downstream of the second heat exchange section 12 along the fluid flow direction, the first heat exchange channel 10 can preferentially exchange heat on the outer circumferential side of the battery 1000, which is beneficial to improve the temperature difference of the battery 1000 in different environments and improve the service life of the battery 1000 to a certain extent.

[0434] The heat exchanger 100 is configured such that when heating the battery assembly 200 of the battery 1000, the first heat exchange section 11 is connected downstream of the second heat exchange section 12 along the fluid flow direction; and when cooling the battery assembly 200 of the battery 1000, the first heat exchange section 11 is connected upstream of the second heat exchange section 12 along the fluid flow direction.

[0435] Specifically, when heating the battery assembly 200 of the battery 1000, the temperature of the heat exchange fluid flowing inside the heat exchanger 100 is higher than the operating temperature of the battery 1000. The heat exchanger 100 heats the battery assembly 200. The high-temperature heat exchange fluid first flows into the second heat exchange section 12 and then flows to the first heat exchange section 11. The temperature of the heat exchange fluid flowing inside the second heat exchange section 12 is higher than the temperature of the heat exchange fluid inside the first heat exchange section 11.

[0436] Because the high-temperature fluid first enters the second heat exchange section 12 located around the first heat exchange channel 10, the second heat exchange section 12 can first heat the battery cells 2011 around the battery assembly 200. After the heat exchange fluid enters the first heat exchange section 11, it cools the battery cells 2011 in the middle of the battery assembly 200. Since the battery cells 2011 around the battery 1000 dissipate more heat to the external environment, their temperature drops more. The heat exchange fluid first heats the battery cells 2011 around the battery 1000. The higher temperature of the heat exchange fluid can raise the temperature of the battery cells 2011 around the battery 1000 while compensating for the heat lost by the battery cells 2011 due to heat dissipation to the external environment, thus meeting their heating needs.

[0437] The battery cells 2011 located in the middle of the battery module 200 have a small contact area with the external environment, resulting in less heat loss. The lower-temperature heat exchange fluid flowing in the first heat exchange section 11 can effectively meet the heating needs of the battery cells 2011, in conjunction with the heat generated by the battery cells themselves. As a result, the heating effect obtained by the battery cells 2011 on the periphery of the battery module 200 and the battery cells 2011 located in the middle of the battery module 200 is basically the same. Consequently, the temperature of the battery cells 2011 on the periphery of the battery module 200 and the battery cells 2011 located in the middle of the battery module 200 is more consistent after heating, making the temperature distribution within the battery 1000 more uniform.

[0438] When cooling the battery assembly 200 of the battery 1000, the temperature of the heat exchange fluid flowing in the heat exchanger 100 is lower than the operating temperature of the battery 1000. The heat exchanger 100 is used to cool the battery 1000. The heat exchange fluid flows from the first heat exchange section 11 to the second heat exchange section 12. The temperature of the heat exchange fluid flowing in the first heat exchange section 11 is lower than the temperature of the heat exchange fluid inside the second heat exchange section 12.

[0439] When the battery 1000 is cooled down, the heat exchange fluid flows from the first heat exchange section 11 to the second heat exchange section 12. That is, the heat exchange fluid flows from the middle part of the battery assembly 200 to the edge of the battery assembly 200 and exchanges heat. In this process, since the heat dissipation of the battery cells 2011 at the periphery of the battery 1000 is better than that of the internal battery cells 2011, the lower-temperature heat exchange fluid in the first heat exchange section 11 can better meet the heat dissipation needs of the battery cells 2011 in the middle of the battery 1000. At the same time, since the battery cells 2011 at the periphery of the battery assembly 200 can directly face the external environment for natural heat dissipation, even if the temperature of the heat exchange fluid in the second heat exchange section 12 is slightly higher, it can still meet the heat dissipation needs of the peripheral battery cells 2011. As a result, the cooling effect of the battery cells 2011 at the periphery of the battery 1000 and the battery cells 2011 in the middle of the battery 1000 is roughly the same. This makes the temperatures of the battery cells 2011 at the periphery of the battery 1000 and the battery cells 2011 in the middle of the battery 1000 more consistent after cooling, reducing the temperature difference between the inside and outside of the battery assembly 200 and making the temperature distribution inside the battery 1000 more uniform.

[0440] In the above embodiment, by configuring the heat exchanger 100 such that when heating the battery assembly 200 of the battery 1000, the first heat exchange section 11 is connected downstream of the second heat exchange section 12 along the fluid flow direction; and when cooling the battery assembly 200 of the battery 1000, the first heat exchange section 11 is connected upstream of the second heat exchange section 12 along the fluid flow direction, the heat exchange effect on the battery 1000 can be further improved, and the temperature uniformity of the battery assembly 200 can be enhanced.

[0441] In some examples of this application, referring to Figures 4 and 8-13, the number of heat exchange tubes can be one or more, and the inner side of each heat exchange tube defines a heat exchange flow channel. When the number of heat exchange tubes is multiple, the multiple heat exchange tubes are arranged at intervals along a third direction or arranged around each other, and the heat exchange flow channel of at least one heat exchange tube is formed as a first heat exchange flow channel 10.

[0442] The number of heat exchange tubes can be one or more. When there are multiple heat exchange tubes, there can be two, three, four, etc. The multiple heat exchange tubes define multiple heat exchange channels. Among the multiple heat exchange channels, one, a portion, or all of the heat exchange channels can form the first heat exchange channel 10. The multiple heat exchange tubes can be arranged at intervals in a third direction, or they can be arranged around each other. The multiple heat exchange channels formed by the multiple heat exchange tubes are also arranged around each other accordingly. For example, the multiple first heat exchange sections 111 in the first heat exchange channel 10 can be staggered with the multiple first heat exchange sections 111 in other first heat exchange channels 10 in a first direction, or the second heat exchange section 121 in the first heat exchange channel 10 can be arranged adjacent to the second heat exchange section 121 or the third heat exchange section 122 in other first heat exchange channels 10, and other arrangements are not listed here.

[0443] For example, as shown in Figure 12, the heat exchanger 100 has two heat exchange channels arranged in parallel, which are arranged around each other. Furthermore, both heat exchange channels can be formed as the first heat exchange channel 10. As shown in Figure 13, the heat exchanger 100 has three heat exchange channels arranged in parallel, which are arranged around each other.

[0444] In the above embodiments, by setting one or more heat exchange tubes, the heat exchange tubes can be reasonably set according to the heat exchange needs of the battery 1000, thereby better meeting the heat exchange needs of different batteries 1000; the multiple first heat exchange channels 10 are arranged at intervals along the first direction, and the overall structure of the first heat exchange channels 10 can be arranged more compactly, thereby making the design and arrangement of the heat exchange component 100 more convenient; setting the multiple first heat exchange channels 10 to be arranged around each other can make the multiple first heat exchange channels 10 in the heat exchange component 100 more integrated, and the overall structure of the heat exchange component 100 can be arranged more flexibly and compactly, thereby enabling the heat exchange component 100 to better meet the heat exchange area requirements of the battery cells 2011 at different positions in the battery assembly 200.

[0445] In one example of this application, referring to Figure 4, there can be multiple heat exchange tubes, which form multiple heat exchange channels. The multiple heat exchange channels are arranged at intervals along a third direction, and the two heat exchange channels at both ends of the third direction are both first heat exchange channels 10. The two first heat exchange channels 10 can be arranged symmetrically about the center line of the heat exchanger 100 along the first direction, wherein the first direction is set at an angle to the third direction.

[0446] It is understandable that arranging the second heat exchange section 12 of the first heat exchange channel 10 around the periphery of the battery module 200 can improve the uniformity of the temperature inside and outside the battery module 200. Therefore, forming both heat exchange channels at both ends of the first direction as the first heat exchange channel 10 can make the temperature uniformity of the battery cells 2011 at both ends of the battery module 200 in the first direction better, and achieve overall temperature uniformity of the battery module 200.

[0447] Furthermore, the fluid flow direction and the inlet and outlet at both ends of the two first heat exchange channels 10 are symmetrically arranged, so that the two first heat exchange channels 10 can simultaneously exchange heat at both ends of the battery assembly 200 in the first direction, resulting in better temperature uniformity.

[0448] The phrase "the first direction and the third direction are set at an angle" is meant to illustrate that the third direction and the first direction can be arranged perpendicularly or they can be arranged in a non-perpendicular manner that only intersects. For example, the third direction and the first direction can be arranged at angles of 30°, 40°, 50°, 60°, 70°, 80°, etc.

[0449] In the above embodiment, by setting two symmetrically arranged first heat exchange channels 10, liquid can be fed into both sides at the same time, the liquid flow rate can be increased, the length of a single heat exchange channel can be shortened, the pressure drop in a single heat exchange channel can be reduced, and thus the heat exchange efficiency can be improved.

[0450] In some specific embodiments of this application, as shown in FIG4, multiple heat exchange channels can be arranged symmetrically about the centerline of the heat exchanger 100 along a first direction.

[0451] The multiple heat exchange channels are symmetrically arranged in terms of flow direction and inlet / outlet at both ends, which can divide the heat exchanger 100 into two symmetrically distributed parts. In this way, during the heat exchange process, the fluid distribution of the two symmetrical parts of the heat exchanger 100 is consistent, thereby improving the temperature consistency of the heat exchange areas corresponding to the two parts of the battery module 200 and the heat exchanger 100, and further improving the temperature uniformity of the battery module 200.

[0452] In the above embodiment, by setting multiple heat exchange channels symmetrically arranged about the center line of the heat exchanger 100 along the first direction, the multiple heat exchange channels can exchange heat with the battery module 200 simultaneously, thereby improving the heat exchange efficiency. At the same time, it can also improve the temperature consistency of the two heat exchange areas of the symmetrically arranged battery module 200 and heat exchanger 100, thereby further improving the temperature uniformity of the battery module 200.

[0453] In some specific embodiments of this application, multiple heat exchange channels are arranged asymmetrically about the centerline of the heat exchanger 100 along the first direction. In this way, the multiple heat exchange channels can be designed according to the actual situation of the battery module 200, so that the heat exchanger 100 can meet the heat exchange requirements of the battery module 200 and further ensure the heat exchange effect of the battery module 200.

[0454] In one example of this application, referring to FIG11, the number of heat exchange tubes can be multiple, and the heat exchange channel of at least one heat exchange tube is formed as a second heat exchange channel 30. The structure of any second heat exchange channel 30 may be the same as or different from the structure of the first heat exchange channel 10.

[0455] Specifically, the second heat exchange channel 30 can be located between the two first heat exchange channels 10, mainly for heat exchange with the middle position of the battery assembly 200. The temperature of the battery cell 201 located in the middle position is relatively uniform. Therefore, the structure of any second heat exchange channel 30 can be the same as or different from the structure of the first heat exchange channel 10. For example, the structure of the second heat exchange channel 30 can be a simple U-shaped structure. Furthermore, the structure of the second heat exchange channel 30 can be designed according to the actual heat exchange situation of the battery 1000.

[0456] In addition, the number of second heat exchange channels 30 can be one or more. For example, the number of second heat exchange channels 30 can be one, two, three or more. The number of second heat exchange channels 30 can be selected according to the arrangement of the battery module 200.

[0457] In the above embodiments, by providing at least one second heat exchange channel 30, the diversity of heat exchange channel arrangement can be increased, enabling the heat exchanger 100 to better exchange heat with the battery assembly 200 and improve the heat exchange effect of the heat exchanger 100.

[0458] In one specific embodiment of this application, referring to FIG11, the second heat exchange channel 30 may be disposed between two first heat exchange channels 10, wherein the structure of any second heat exchange channel 30 is the same as or different from the structure of the first heat exchange channel 10.

[0459] Specifically, the second heat exchange channel 30 is located between the two first heat exchange channels 10 and is mainly used for heat exchange with the middle position of the battery assembly 200. The temperature of the battery cell 201 located in the middle position is relatively uniform. Therefore, the structure of any second heat exchange channel 30 can be the same as or different from the structure of the first heat exchange channel 10. For example, the structure of the second heat exchange channel 30 can be a simple U-shaped structure. Furthermore, the structure of the second heat exchange channel 30 can be designed according to the actual heat exchange situation of the battery 1000.

[0460] In addition, the number of second heat exchange channels 30 can be one or more. For example, the number of second heat exchange channels 30 can be one, two, three or more. The number of second heat exchange channels 30 can be selected according to the arrangement of the battery module 200.

[0461] In the above embodiments, by providing at least one second heat exchange channel 30, the diversity of heat exchange channel arrangement can be increased, enabling the heat exchanger 100 to better exchange heat with the battery assembly 200 and improve the heat exchange effect of the heat exchanger 100.

[0462] In some specific embodiments of this application, referring to FIG11, the second heat exchange channel 30 may include a plurality of fourth heat exchange sections 31, which are connected sequentially. The fourth heat exchange sections 31 may extend along a first direction, and the plurality of fourth heat exchange sections 31 are arranged at intervals in a third direction.

[0463] Specifically, multiple fourth heat exchange sections 31 connected in sequence can form a U-shaped heat exchange channel or an S-shaped heat exchange channel.

[0464] For example, the number of fourth heat exchange sections 31 can be two, three or more, and the number of fourth heat exchange sections 31 can be designed according to the size of the battery assembly 200.

[0465] In the above embodiments, by providing the second heat exchange channel 30 to include a plurality of sequentially connected fourth heat exchange sections 31, the structural complexity of the second heat exchange channel 30 can be reduced, thereby reducing the production cost of the second heat exchange channel 30 and thus reducing the production cost of the heat exchange component 100.

[0466] In one example of this application, as shown in FIG12, there can be multiple heat exchange tubes, one of which defines a first heat exchange channel 10, and at least one heat exchange tube forms a third heat exchange channel 40. The third heat exchange channel 40 is bent within the U-shaped region 120 of the first heat exchange channel 10, and the first heat exchange channel 10 and the third heat exchange channel 40 are bent in the same plane. The bending structures of the first heat exchange channel 10 and the third heat exchange channel 40 may be the same or different.

[0467] In this embodiment, at least one of the multiple heat exchange tubes forms a third heat exchange channel 40. There may be one or more third heat exchange channels 40; for example, the number of third heat exchange channels 40 may be one, two, three, or more. Both the first heat exchange channel 10 and the third heat exchange channel 40 may include a first heat exchange section 111, a second heat exchange section 121, a third heat exchange section 122, and a fourth heat exchange section 125.

[0468] For example, as shown in Figure 12, the multiple heat exchange channels include a first heat exchange channel 10 and a third heat exchange channel 40. The third heat exchange channel 40 has the same structure as the first heat exchange channel 10, and the third heat exchange channel 40 is bent within the U-shaped region 120 of the first heat exchange channel 10.

[0469] Specifically, both the first heat exchange channel 10 and the third heat exchange channel 40 include a first heat exchange section 111, a second heat exchange section 121, a third heat exchange section 122, and a fourth heat exchange section 125. The multiple first heat exchange sections 111, 122, and 125 of the first and third heat exchange channels 10 and 40 extend along the X direction, while the second heat exchange section 121 extends along the Y direction. The fourth heat exchange section 125, the second heat exchange section 121, and the third heat exchange section 122 are sequentially bent and connected to form a U-shaped structure with the opening facing the side away from the origin in the X direction. Multiple first heat exchange sections 111 are arranged within the U-shaped region 120, spaced apart along the Y direction, and sequentially bent and connected.

[0470] In this configuration, the third heat exchange section 122 of the first heat exchange channel 10 is arranged on the side of the plurality of first heat exchange sections 111 furthest from the origin in the Y direction, and the fourth heat exchange section 125 is arranged on the side of the plurality of first heat exchange sections 111 closest to the origin in the Y direction. The third heat exchange channel 40 is connected to the first heat exchange section 111 furthest from the origin in the Y direction. The third heat exchange section 122 of the third heat exchange channel 40 is arranged on the side of the plurality of first heat exchange sections 111 closest to the origin in the Y direction, and the fourth heat exchange section 125 is arranged on the side of the plurality of first heat exchange sections 111 furthest from the origin in the Y direction. The third heat exchange section 122 of the third heat exchange channel 40 is connected to the first heat exchange section 111 closest to the origin in the Y direction. The third heat exchange channel 40 is located between the fourth heat exchange section 125 and the plurality of first heat exchange sections 111 of the first heat exchange channel 10.

[0471] In addition, the first heat exchange channel 10 and the third heat exchange channel 40 also include a first inlet / outlet section 15 and a second inlet / outlet section 17. The first inlet / outlet section 15 of the first heat exchange channel 10 is connected to the fourth heat exchange section 125, and the second inlet / outlet section 17 is connected to the first heat exchange section 111, which is closest to the origin in the Y direction. The first inlet / outlet section 15 of the third heat exchange channel 40 is connected to the first heat exchange section 111, which is farthest from the origin in the Y direction, and the second inlet / outlet section 17 is connected to the fourth heat exchange section 125.

[0472] In the above embodiments, by setting multiple heat exchange channels, the diversity of heat exchange channels can be increased, and the arrangement of heat exchange channels can be designed according to the cooling requirements of the battery 1000, thereby further increasing the heat exchange effect of the heat exchange component 100 and improving the temperature uniformity of the battery 1000.

[0473] In one example of this application, referring to Figures 12 and 13, the third heat exchange channel 40 may include a U-shaped region 120 with the same structure as the first heat exchange channel 10, and at least a portion of the first heat exchange section 11 of the first heat exchange channel 10 is disposed within the U-shaped region 120 of the third heat exchange channel 40.

[0474] It is understandable that the first heat exchange channel 10 may be partially located within the U-shaped region 120 of the third heat exchange channel 40, or it may be entirely located within the U-shaped region 120 of the third heat exchange channel 40.

[0475] For example, as shown in Figure 13, the multiple heat exchange channels include a first heat exchange channel 10 and two third heat exchange channels 40, and the two third heat exchange channels 40 have the same structure as the first heat exchange channel 10.

[0476] Specifically, the first heat exchange channel 10 and the two third heat exchange channels 40 each include a first heat exchange section 111, a second heat exchange section 121, a third heat exchange section 122, and a fourth heat exchange section 125. The fourth heat exchange section 125, the second heat exchange section 121, and the third heat exchange section 122 of any one of the first heat exchange channel 10 and the two third heat exchange channels 40 are sequentially bent and connected to form a U-shaped structure with the opening facing away from the origin in the X direction. Multiple first heat exchange sections 111 are arranged within the U-shaped region 120, extending linearly along the X direction and spaced apart and sequentially bent and connected along the Y direction. The second heat exchange section 121 extends along the Y direction, and the third heat exchange section 122 and the fourth heat exchange section 125 both extend along the X direction.

[0477] The third heat exchange section 122 of the first heat exchange channel 10 is located on the side of the plurality of first heat exchange sections 111 that is far from the origin in the Y direction, and is connected to the first heat exchange section 111 that is farthest from the origin in the Y direction. The fourth heat exchange section 125 is located on the side of the plurality of first heat exchange sections 111 that is close to the origin in the Y direction.

[0478] The third heat exchange section 122 of the third heat exchange channel 40a is located on the side of the plurality of first heat exchange sections 111 furthest from the origin in the Y direction, and is connected to the first heat exchange section 111 at the furthest position from the origin in the Y direction. The third heat exchange section 122 of the third heat exchange channel 40a and the first heat exchange section 111 at the furthest position from the origin in the Y direction of the third heat exchange channel 40a are located between the third heat exchange section 122 of the first heat exchange channel 10 and the plurality of first heat exchange sections 111 of the first heat exchange channel 10. The plurality of first heat exchange sections 111 of the first heat exchange channel 10 are located between the first heat exchange section 111 at the furthest position from the origin in the Y direction of the third heat exchange channel 40a and the second first heat exchange section 111 on the side of the third heat exchange channel 40a furthest from the origin in the Y direction.

[0479] The third heat exchange channel 40b is located between the fourth heat exchange section 125 of the third heat exchange channel 40a and the plurality of first heat exchange sections 111 of the third heat exchange channel 40a. The fourth heat exchange section 125 of the third heat exchange channel 40b is located on the side of the plurality of first heat exchange sections 111 of the third heat exchange channel 40b that is far away from the origin of the coordinate in the Y direction. The third heat exchange section 122 of the third heat exchange channel 40b is connected to the first heat exchange section 111 of the third heat exchange channel 40b that is closest to the origin of the coordinate in the Y direction.

[0480] In addition, the first heat exchange channel 10 and the two third heat exchange channels 40 also include a first inlet / outlet section 15 and a second inlet / outlet section 17, wherein the first inlet / outlet section 15 and the second inlet / outlet section 17 are respectively connected to the fourth heat exchange section 125 and the first heat exchange section 111.

[0481] In the above embodiment, by providing a third heat exchange channel 40 including a U-shaped region 120 with the same structure as the first heat exchange channel 10, and at least a portion of the first heat exchange section 11 of the first heat exchange channel 10 being disposed within the U-shaped region 120 of the third heat exchange channel 40, the first heat exchange channel 10 and at least a portion of the third heat exchange channel 40 can be arranged around each other. In this way, the arrangement of the heat exchange channels can be arranged according to the heat exchange requirements of each part of the battery assembly 200, further increasing the heat exchange effect of the heat exchange component 100 and improving the temperature uniformity of the battery 1000.

[0482] According to some embodiments of this application, as shown in Figures 12 and 13, the U-shaped region 120 of the second heat exchange section 12 of the first heat exchange channel 10 is located in the outermost circumferential direction of the heat exchange element 100.

[0483] In other words, the U-shaped region 120 of the second heat exchange section 12 of the first heat exchange channel 10 is formed as the outermost heat exchange channel of the heat exchange element 100. In this way, the U-shaped region 120 of the first heat exchange channel 10 can be used to exchange heat with the outer periphery of the battery module 200, thereby improving the heat exchange effect on the periphery of the battery module 200.

[0484] In the above embodiment, by setting the U-shaped region 120 of the second heat exchange section 12 of the first heat exchange channel 10 to be located in the outermost circumferential direction of the heat exchange element 100, the second heat exchange section 12 can exchange heat in the outer circumferential direction of the battery 1000, which is beneficial to improve the temperature difference of the battery 1000 in different environments and improve the service life of the battery 1000 to a certain extent.

[0485] In some embodiments of this application, referring to Figures 4 and 14, the heat exchange tube can be formed by bending a single tube. The heat exchange tube can be bent in an arc at the bending point.

[0486] Among them, single tube bending and forming refers to the process where a heat exchange tube can be formed by bending a single straight tube multiple times through processing techniques such as pressing and rolling. For example, a single straight tube can be bent at multiple preset positions to form a V-shape, U-shape, etc. at the bending positions. The bending shape of the single tube can be designed according to the actual situation.

[0487] In the above embodiments, by setting the heat exchange tube to be bent from a single tube, the number of weld points of the heat exchange component 100 can be reduced, thereby reducing the risk of leakage of the heat exchange component 100 and improving the reliability of the heat exchange component 100. At the same time, the operation process of bending a single tube is simpler than the manufacturing process of a plate structure, thereby significantly reducing the cost of the heat exchange component 100.

[0488] In some embodiments of this application, the heat exchange tube may be bent in an arc at the bend position.

[0489] Among them, the arc-shaped bend can reduce the flow resistance of the fluid and reduce the pressure drop. Furthermore, the arc-shaped bend of the heat exchange tube at the bend position can increase the flow rate of the heat exchange fluid in the heat exchange channel, thereby increasing the heat exchange efficiency of the heat exchange component 100.

[0490] In the above embodiments, by setting the heat exchange tube to bend in an arc at the bend position, the flow resistance of the fluid can be reduced, the pressure drop can be reduced, and the flow rate of the heat exchange fluid in the heat exchange channel can be increased, thereby increasing the heat exchange efficiency of the heat exchange element 100.

[0491] According to some embodiments of this application, as shown in FIG14, the bending angle of the heat exchange tube at the bending position is less than 180°.

[0492] For example, the bending angle of the heat exchange tube at the bend can be 30°, 60°, 90°, 120°, 150° or 179°.

[0493] In the above embodiments, by setting the bending angle of the heat exchange tube at the bending position to be less than 180°, the probability of the heat exchange tube being damaged by bending can be reduced.

[0494] In one embodiment of this application, referring to FIG14, the heat exchange tube can be bent in an arc at the bending position, and the ratio of the bending radius of the heat exchange tube on the center line along the length direction to the width of the heat exchange tube is greater than or equal to 0.6.

[0495] For example, as shown in Figure 12, the bending radius of the heat exchange tube along the center line of the length direction is denoted as r, and the width of the heat exchange tube is denoted as d. Then the ratio of r to d can be 0.6, 0.8, 1.0, 1.2, 1.4, 1.6, 1.8, 2.0 and above.

[0496] It should be noted that when heat exchange tubes are bent, under the action of internal pressure stress, the circular cross-section tends to become elliptical, generating a minor axis and a major axis. The tube bending machine will generate additional stress at the major axis. The greater the ellipticity, that is, the larger the bending angle and the smaller the ratio of the bending radius to the width of the heat exchange tube, the greater this additional stress will be, and it may even form a high-stress zone, resulting in local plastic deformation. After reaching a certain value, it will lead to a reduction in the load-bearing capacity of the bent tube and its failure.

[0497] In the above embodiments, by setting the ratio of the bending radius of the heat exchange tube along the center line of the length direction to the width of the heat exchange tube to be greater than or equal to 0.6, the heat exchange tube is less likely to break during bending and stretching, thereby reducing the probability of damage to the heat exchange tube during bending, improving the structural strength of the heat exchange tube 1 at the bending position, and improving the sealing performance of the heat exchange tube at the bending position.

[0498] In some examples of this application, referring to Figure 14, the ratio of the bending radius of the heat exchange tube to the width of the heat exchange tube can be greater than or equal to 0.8.

[0499] For example, as shown in Figure 12, the bending radius of the heat exchange tube along the center line of the length direction is denoted as r, and the width of the heat exchange tube is denoted as d. Then the ratio of r to d can be 0.8, 1.0, 1.2, 1.4, 1.6, 1.8, 2.0 and above.

[0500] In the above embodiments, by setting the ratio of the bending radius of the heat exchange tube to the width of the heat exchange tube to be greater than or equal to 0.8, the probability of damage to the heat exchange tube during bending can be further reduced, the structural strength of the heat exchange tube at the bending position can be further improved, and the sealing performance of the heat exchange tube at the bending position can be improved.

[0501] In some examples of this application, referring to Figure 14, the wall thickness of the heat exchange tube at the bend can be greater than or equal to 0.2 mm.

[0502] For example, the wall thickness of the heat exchange tube at the bend can be 0.2 mm, 0.3 mm, 0.4 mm or more.

[0503] In the above embodiments, by setting the wall thickness of the heat exchange tube at the bending position to be greater than or equal to 0.2 mm, the wall thickness of the heat exchange tube at the bending position is not too thin, which helps to ensure the strength of the heat exchange tube at the bending position, thereby effectively reducing the risk of leakage at the bending position of the heat exchange tube and improving the reliability of the heat exchange tube.

[0504] In one embodiment of this application, at the bend of the heat exchange tube, the bend reduction rate of the heat exchange tube wall thickness can be less than or equal to 50%.

[0505] The bending thinning rate is equal to the thickness lost due to the extension of the heat exchange tube divided by the original thickness multiplied by 100%.

[0506] For example, the wall thickness of the heat exchange tube can be reduced by bending at a rate of 2%, 5%, 10%, 20%, 30%, 40%, or 50%.

[0507] In the above embodiments, by setting the bending thinning rate of the heat exchange tube to be less than or equal to 50%, the wall thickness loss of the heat exchange tube can be kept within a preset range. This ensures that the wall thickness of the heat exchange tube at the bending position is not too thin, which helps to ensure the strength of the heat exchange tube at the bending position and effectively reduces the risk of leakage at the bending position of the heat exchange tube, thereby improving the reliability of the heat exchange tube.

[0508] In some examples of this application, the bending thinning rate of the heat exchange tube can be less than or equal to 30%.

[0509] For example, the wall thickness of the heat exchange tube can be reduced by bending at a rate of 2%, 5%, 10%, 20%, or 30%.

[0510] In the above embodiments, by setting the bending thinning rate of the heat exchange tube to be less than or equal to 30%, the wall thickness loss after bending of the heat exchange tube can be further reduced, and the strength of the bending position of the heat exchange tube can be further improved.

[0511] In some embodiments of this application, the heat exchange tube can be a flat tube or a harmonica tube.

[0512] It is understood that in some embodiments, the heat exchange tube is a flat tube, while in other embodiments, the heat exchange tube is a harmonica tube. A flat tube refers to a heat exchange tube whose cross-section along its extension direction is non-circular, such as having an elliptical or rectangular cross-section; a harmonica tube is a type of flat tube.

[0513] Specifically, the flat tube has flat upper and lower surfaces and a large contact area, which can increase the heat transfer area of ​​the heat exchanger 100 and thus increase the heat exchange effect of the heat exchanger 100. At the same time, the flat tube is relatively light in weight while having the same bending and torsional strength. Therefore, using the flat tube as the heat exchange tube can also reduce the overall weight of the heat exchanger 100 and thus increase the energy density of the battery 1000.

[0514] Furthermore, the flat tube can have one heat exchange channel inside, or it can have multiple heat exchange channels by setting internal partitions.

[0515] For example, both flat tubes and harmonica tubes can be provided with partition ribs. The partition ribs can extend along the length of the flat tube or harmonica tube and divide the heat exchange channel inside the flat tube or harmonica tube into multiple sub-channels.

[0516] In the above embodiments, by setting the heat exchange tube as a flat tube or a harmonica tube, the heat transfer area of ​​the heat exchange element 100 can be increased, thereby increasing the heat exchange effect of the heat exchange element 100; at the same time, the overall weight of the heat exchange element 100 can be reduced, thereby increasing the energy density of the battery 1000.

[0517] In some embodiments of this application, the heat exchange tube may be an aluminum tube.

[0518] In the above embodiment, the heat exchange tube is made of aluminum tube. Aluminum tube is lightweight, inexpensive, has good structural strength, and has excellent thermal conductivity. This reduces the manufacturing cost of the heat exchange component 100 and better meets the lightweight requirements of the battery 1000. It also ensures good heat exchange efficiency when the heat exchange tube exchanges heat with the battery cell 2011, thereby improving the heat exchange effect of the battery cell 2011.

[0519] In one embodiment of this application, referring to FIG14, the wall thickness of the heat exchange tube can be 0.2mm-3mm.

[0520] For example, as shown in Figure 12, the wall thickness of the heat exchange tube is denoted as m. The wall thickness m of the heat exchange tube can be 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.5mm, 1.7mm, 2mm, 2.4mm, 2.6mm, 2.8mm, 3mm, etc.

[0521] In the above embodiments, by setting the wall thickness of the heat exchange tube to 0.2mm-3mm, the heat exchange tube has a suitable wall thickness, which prevents the wall thickness from being too small, thereby ensuring the strength of the heat exchange tube and effectively reducing the risk of damage to the heat exchange tube; it also prevents the wall thickness of the heat exchange tube from being too large, which helps to reduce the overall weight of the heat exchange tube, thereby reducing the overall weight of the battery 1000 and achieving the lightweighting of the battery 1000.

[0522] In one embodiment of this application, referring to FIG14, the wall thickness of the heat exchange tube can be 0.5mm-1.2mm.

[0523] For example, the wall thickness m of the heat exchange tube can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm or 1.2mm, etc.

[0524] In the above embodiments, by setting the wall thickness of the heat exchange tube to 0.5mm-1.2mm, the strength of the heat exchange tube can be guaranteed while the overall weight of the heat exchange tube can be reduced, thus achieving the lightweighting of the Battery 1000.

[0525] In one embodiment of this application, the heat exchanger 100 may include a heat exchange plate, and the heat exchange channels may be formed on the heat exchange plate by stamping.

[0526] Stamping is a forming process that uses a press and dies to apply external force to sheet metal, strip, tube, and profile, causing plastic deformation or separation to obtain a workpiece (stamped part) of the required shape and size. In this way, the heat exchanger 100 does not require assembly, reducing the number of parts in the heat exchanger 100, reducing the assembly steps of the battery 1000, and increasing the assembly rate of the battery 1000.

[0527] In the above embodiments, stamping the heat exchange channel onto the heat exchange plate can reduce the number of process steps for the heat exchange component 100, thereby increasing the production rate of the heat exchange component 100. At the same time, stamping is simple to manufacture and consumes less material, which can also reduce the production cost of the heat exchange component 100.

[0528] In some examples of this application, referring to Figure 14, the width of the heat exchange channel can be 3mm-200mm.

[0529] For example, the width f of the heat exchange channel can be 3mm, 5mm, 6mm, 8mm, 12mm, 15mm, 16mm, 18mm, 21mm, 23mm, 24mm, 26mm, 28mm, 30mm, 60mm, 90mm, 120mm, 150mm, 180mm, or 200mm. The width of the heat exchange channel can be designed according to the layout of the heat exchange channel and the width dimensions of the battery cell 2011.

[0530] In the above embodiments, by setting the width of the heat exchange channel to 3mm-200mm, the width of the heat exchange channel can be prevented from being too large, which is beneficial to the layout of the heat exchange channel and can meet the heat exchange effect required by the heat exchange component 100; it can also prevent the width of the heat exchange channel from being too small, thus reducing the number of first heat exchange sections 11, thereby reducing the overall cost of the heat exchange component 100.

[0531] In one example of this application, referring to Figure 14, the width f of the heat exchange channel can be 5mm-80mm.

[0532] For example, the width f of the heat exchange channel can be 5mm, 7mm, 9mm, 12mm, 15mm, 16mm, 18mm, 21mm, 23mm, 24mm, 26mm, 28mm, 30mm, 40mm, 50mm, 60mm, 70mm or 80mm.

[0533] In the above embodiments, by further limiting the width of the heat exchange channel to between 5mm and 80mm, the width of the heat exchange channel can better meet the arrangement requirements of the heat exchange channel in the battery 1000 and the heat exchange effect required by the heat exchange component 100.

[0534] In some examples of this application, referring to Figure 14, the height of the heat exchange channel in the second direction can be 1mm-20mm.

[0535] For example, the second direction can refer to the Z direction shown in Figure 3, and the height of the heat exchange channel in the second direction can be 1mm, 2mm, 3mm, 5mm, 6mm, 8mm, 9mm, 10mm, 12mm, 15mm, 16mm, 17mm, 19mm, 20mm, etc.

[0536] In the above embodiments, by setting the height of the heat exchange channel in the second direction to 1mm-20mm, the height of the heat exchange element 100 is not too small, thereby ensuring the flow rate of the heat exchange fluid in the heat exchange element 100 and thus ensuring the heat exchange effect of the heat exchange element 100; at the same time, it also ensures that the height of the heat exchange element 100 is not too large, which is beneficial to reducing the space occupied by the heat exchange element 100 and realizing the miniaturization of the battery 1000.

[0537] In one example of this application, the height of the heat exchange channel in the second direction can be 4mm-6mm.

[0538] For example, the height of the heat exchange channel in the second direction can be 4mm, 5mm or 6mm.

[0539] In the above embodiment, by setting the height of the heat exchange channel in the second direction to 4mm-6mm, the heat exchange effect of the heat exchange component 100 can be guaranteed, while the space occupied by the heat exchange component 100 can be reduced, thereby realizing the miniaturization of the battery 1000.

[0540] In one example of this application, the number of heat exchange channels can be 2 to 4.

[0541] For example, the number of heat exchange channels can be 2, 3 or 4, and the number of heat exchange channels can be designed according to actual needs.

[0542] In the above embodiments, by setting the number of heat exchange channels to 2 to 4, the length of a single heat exchange channel can be reduced, thereby reducing the frictional resistance of the heat exchange channel, reducing the pressure drop, and thus improving the heat exchange efficiency of the heat exchanger 100.

[0543] In some embodiments of this application, the heat exchange fluid in the heat exchange channel can be a mixture of water and ethylene glycol; more preferably, the heat exchange fluid is a mixture of 50% water and 50% ethylene glycol.

[0544] The heat exchange fluid is a mixture of water and ethylene glycol. Specifically, the mixing ratio of water and ethylene glycol in the heat exchange fluid can be set according to the heat exchange requirements. For example, the heat exchange fluid can be a mixture of 35% water and 65% ethylene glycol, 38% water and 62% ethylene glycol, 42% water and 58% ethylene glycol, 48% water and 52% ethylene glycol, 50% water and 50% ethylene glycol, 52% water and 48% ethylene glycol, and so on. Further, the heat exchange fluid can be a mixture of 50% water and 50% ethylene glycol. Here, the ratio of water to ethylene glycol in the above mixtures is a volume ratio.

[0545] In the above embodiment, the heat exchange fluid in the heat exchange channel is set as a mixture of water and ethylene glycol. The aqueous ethylene glycol solution has good stability and good heat transfer properties, which can effectively carry out heat exchange operations.

[0546] In some embodiments of this application, the thermal conductivity of the heat exchange fluid in the heat exchange channel can be greater than or equal to 0.3 W / (m·K); further optionally, the thermal conductivity is 0.328 W / (m·K)-0.417 W / (m·K).

[0547] For example, the thermal conductivity of the heat exchange fluid in the heat exchange channel can be 0.3 W / (m·K), 0.32 W / (m·K), 0.35 W / (m·K), 0.38 W / (m·K), 0.4 W / (m·K), 0.44 W / (m·K), 0.48 W / (m·K), etc. The heat exchange fluid can be set according to the heat exchange requirements so that the thermal conductivity meets the heat exchange requirements. Furthermore, the thermal conductivity can be set between 0.328 W / (m·K) and 0.417 W / (m·K), for example, the thermal conductivity can be 0.33 W / (m·K), 0.34 W / (m·K), 0.35 W / (m·K), 0.36 W / (m·K), 0.37 W / (m·K), 0.38 W / (m·K), 0.39 W / (m·K), 0.4 W / (m·K), 0.41 W / (m·K), etc.

[0548] In the above embodiments, by setting the thermal conductivity to be greater than or equal to 0.3 W / (m·K), the heat exchange fluid can have good heat exchange efficiency and effect, thereby enabling the battery 1000 to achieve good heat exchange. By further limiting the thermal conductivity to between 0.328 W / (m·K) and 0.417 W / (m·K), the heat exchange fluid can have even better heat exchange efficiency and effect, thereby enabling the battery 1000 to achieve even better heat exchange.

[0549] In some embodiments of this application, the casing of the battery cell 2011 can be an aluminum casing.

[0550] The aluminum casing can be manufactured from either a ternary or pentylene aluminum alloy. A ternary aluminum alloy comprises the following components by mass percentage: aluminum ≥ 99.6%, copper ≤ 0.05%, iron ≤ 0.35%, magnesium ≤ 0.03%, manganese ≤ 0.03%, silicon ≤ 0.25%, titanium ≤ 0.03%, vanadium ≤ 0.05%, zinc ≤ 0.05%, and other individual elements ≤ 0.03%. A pentylene aluminum alloy comprises the following components by mass percentage: aluminum ≥ 96.7%, copper ≤ 0.2% (0.05%), iron ≤ 0.7%, manganese ≤ 1.5%, silicon ≤ 0.6%, zinc ≤ 0.1%, other individual elements ≤ 0.05%, and total other elements ≤ 0.15%. For example, the casing of the battery cell 2011 in this design is manufactured using 3003 aluminum alloy, a ternary aluminum alloy.

[0551] In the above embodiment, the casing of the battery cell 2011 is made of aluminum. The casing is lightweight, which can improve the energy density of the battery cell 2011 to a certain extent. The aluminum casing is easy to process and form, which makes the manufacturing efficiency of the battery cell 2011 higher. The aluminum casing has good thermal conductivity, which can make the heat exchange efficiency of the battery cell 2011 higher during heat exchange, thereby making the heat exchange effect of the battery cell 2011 better.

[0552] In some embodiments of this application, the casing of the battery cell 2011 can be a ternary aluminum alloy or a pentylene aluminum alloy.

[0553] For example, the casing of the 2011 battery cell can be manufactured from 3003 aluminum plate, 3004 aluminum plate or 3014 aluminum plate, etc., or from 5052 aluminum plate, 5083 aluminum plate, 5754 aluminum plate or 5182 aluminum plate, etc.

[0554] In the above embodiments, the casing of the battery cell 2011 is made of a three-series aluminum alloy or a five-series aluminum alloy, which can make the casing have good processing and forming performance, corrosion resistance, thermal conductivity and good structural strength, and can transfer heat well, so that the battery cell 2011 has high heat exchange efficiency during heat exchange, thereby well meeting the use and protection requirements of the battery cell 2011.

[0555] In some embodiments of this application, referring to FIG15, the length l of the battery cell 2011 can be 154mm-234mm.

[0556] For example, the length l of the battery cell 2011 can be 154mm, 164mm, 174mm, 184mm, 195mm, 203mm, 207mm, 215mm, 230mm, 234mm, etc.

[0557] In the above embodiment, the length l of the battery cell 2011 is set between 154mm and 234mm, so that the battery cell 2011 can be set with the corresponding length size according to different usage needs to meet the usage needs of the battery 1000.

[0558] In some embodiments of this application, referring to FIG15, the width w of the battery cell 2011 can be 63mm-103mm.

[0559] For example, the width w of the battery cell 2011 can be 63mm, 65mm, 68mm, 72mm, 73mm, 76mm, 80mm, 85mm, 91mm, 95mm, 100mm, 103mm, etc.

[0560] In the above embodiments, the width of the battery cell 2011 is set between 63mm and 103mm, so that the battery cell 2011 can be set with a corresponding width size according to different usage needs to meet the usage needs of the battery 1000.

[0561] In some embodiments of this application, referring to FIG15, the wall thickness δ of the casing of the battery cell 2011 can be 0.4mm-1mm.

[0562] For example, the wall thickness δ of the casing of the battery cell 2011 can be 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, etc.

[0563] In the above embodiments, by setting the wall thickness δ of the battery cell 2011 casing between 0.4mm and 1mm, the casing can have sufficient strength to effectively protect the battery cell 2011, enabling the battery cell 2011 to operate stably and reliably. Furthermore, the smaller wall thickness of the casing facilitates heat transfer between the inside and outside of the battery cell 2011, allowing the battery cell 2011 to achieve better heat exchange performance.

[0564] The current collector 20 according to an embodiment of the present application is described below with reference to Figures 16 and 17. Figure 16 is a schematic diagram of the current collector 20 according to an embodiment of the present application; Figure 17 is a schematic diagram of the current collector 20 from another angle according to an embodiment of the present application.

[0565] In a specific example of this application, as shown in Figures 16 and 17, the heat exchanger 100 may further include a collector 20, which may include: a pipe body 21, a plurality of first flow channel interfaces 22, a plurality of second flow channel interfaces 23, and a partition structure 24.

[0566] Multiple first flow channel interfaces 22 correspond one-to-one with and are connected to the first inlet and outlet of multiple heat exchange channels; multiple second flow channel interfaces 23 correspond one-to-one with and are connected to the second inlet and outlet of multiple heat exchange channels, and at least two second flow channel interfaces 23 are located on both sides of multiple first flow channel interfaces 22 along the extension direction of the tube body 21; a partition structure 24 is disposed inside the tube body 21, the partition structure 24 separates the first flow channel interfaces 22 and the second flow channel interfaces 23 inside the tube body 21, and multiple second flow channel interfaces 23 are connected inside the tube body 21.

[0567] Specifically, the tube body 21 can be used for the collection and distribution of heat exchange fluid; the first flow channel interface 22 and the second flow channel interface 23 are provided on the tube body 21, and the first flow channel interface 22 and the second flow channel interface 23 are respectively connected to the inlet and outlet of the heat exchange channel, used to input and output the heat exchange fluid through the collection pipe. ...

Claims

1. A battery, characterized in that, include: A battery assembly (200) comprising a plurality of battery cells (201), each battery cell (201) comprising a plurality of battery cells (2011) stacked along a first direction; a heat exchanger (100) disposed on one side of the battery assembly (200) in a second direction, the first direction and the second direction intersecting, the heat exchanger (100) comprising a heat exchange tube having a heat exchange channel, the heat exchange channel extending and bending on one side surface of the battery assembly (200) in the second direction, wherein the wall surface of the battery cell (2011) cooperating with the corresponding heat exchange tube is a projection surface, and the area of ​​the orthographic projection of the heat exchange tube on the corresponding wall surface is greater than or equal to 15% of the area of ​​the wall surface.

2. The battery according to claim 1, characterized in that, The thickness of the battery cell (2011) in the first direction is greater than or equal to 40 mm, and the area of ​​the heat exchange tube projected onto the wall surface is greater than or equal to 30% of the wall surface area.

3. The battery according to claim 1, characterized in that, The thickness of the battery cell (2011) in the first direction is greater than or equal to 30 mm and less than 40 mm, and the area of ​​the heat exchange tube projected onto the wall surface is greater than or equal to 15% of the wall surface area and less than 30% of the wall surface area.

4. The battery according to claim 1, characterized in that, The thickness of the battery cell (2011) in the first direction is greater than or equal to 50 mm, and the area of ​​the heat exchange tube projected onto the wall surface is greater than or equal to 45% of the wall surface area.

5. The battery according to claim 1, characterized in that, The thickness of the battery cell (2011) in the first direction is greater than or equal to 40 mm and less than 50 mm, and the area of ​​the heat exchange tube projected onto the wall surface is greater than or equal to 30% of the wall surface area and less than 45% of the wall surface area.

6. The battery according to claim 1, characterized in that, The thickness of the battery cell (2011) in the first direction is greater than or equal to 60 mm, and the area of ​​the heat exchange tube projected onto the wall surface is greater than or equal to 65% of the wall surface area.

7. The battery according to claim 1, characterized in that, The thickness of the battery cell (2011) in the first direction is greater than or equal to 50 mm and less than 60 mm, and the area of ​​the heat exchange tube projected onto the wall surface is greater than or equal to 45% of the wall surface area and less than 65% of the wall surface area.

8. The battery according to claim 1, characterized in that, The thickness of the battery cell (2011) in the first direction is greater than or equal to 80 mm, and the area of ​​the heat exchange tube projected onto the wall surface is greater than or equal to 75% of the wall surface area.

9. The battery according to claim 1, characterized in that, The thickness of the battery cell (2011) in the first direction is greater than or equal to 60 mm and less than 80 mm, and the area of ​​the heat exchange tube projected onto the wall surface is greater than or equal to 65% of the wall surface area and less than 75% of the wall surface area.

10. The battery according to claim 1, characterized in that, The thickness of the battery cell (2011) in the first direction is greater than 100 mm, and the area of ​​the heat exchange tube projected onto the wall surface is greater than or equal to 90% of the area of ​​the wall surface.

11. The battery according to claim 1, characterized in that, The thickness of the battery cell (2011) in the first direction is greater than or equal to 80 mm and less than or equal to 100 mm, and the area of ​​the heat exchange tube projected onto the wall surface is greater than or equal to 75% of the wall surface area and less than 90% of the wall surface area.

12. The battery according to any one of claims 1-11, characterized in that, The heat exchange channel includes a first heat exchange channel (10), which includes a first heat exchange section (11) and a second heat exchange section (12). The second heat exchange section (12) is bent to form a U-shaped region. The first heat exchange section (11) is bent and disposed in the U-shaped region and is bent and connected to the second heat exchange section (12). The battery assembly (200) is composed of the battery cells (2011) located at the outermost periphery in the circumferential direction, forming an outer battery cell. At least a portion of the second heat exchange section (12) is attached to the outer battery cell.

13. The battery according to claim 12, characterized in that, The peripheral battery cells include a first group of battery cells (202), a second group of battery cells (203), and a third group of battery cells (204) arranged adjacent to each other. The first group of battery cells (202) comprises multiple battery cells (2011) stacked along the first direction. The second group of battery cells (203) comprises multiple battery cells (2011) stacked along the third direction. The third group of battery cells (204) comprises multiple battery cells (2011) stacked along the third direction. The first direction, the second direction, and... The third direction is arranged at an angle to each other; the second heat exchange section (12) includes a second heat exchange part (121), a third heat exchange part (122) and a fourth heat exchange part (125) connected together; the second heat exchange part (121) extends and adheres to the first group of battery cells (202) to perform heat exchange, and / or, the third heat exchange part (122) extends and adheres to the second group of battery cells (203) to perform heat exchange, and / or, the fourth heat exchange part (125) extends and adheres to the third group of battery cells (204) to perform heat exchange.

14. The battery according to claim 13, characterized in that, The peripheral battery cell also includes a fourth group of battery cells (205), the fourth group of battery cells (2011) including a plurality of battery cells (2011) arranged along the first direction, the second heat exchange section (12) also includes a fifth heat exchange part (127), the fifth heat exchange part (127) closes at least part of the opening of the U-shaped region formed by the second heat exchange part (121), the third heat exchange part (122) and the fourth heat exchange part (125), the fifth heat exchange part (127) extends and fits against the fourth group of battery cells (205) to enable heat exchange.

15. The battery according to claim 13, characterized in that, The first heat exchange section (11) includes a plurality of first heat exchange parts (111), which are arranged at intervals and connected by bending in sequence. At least one of the battery cells (201) located at both ends in the third direction is the first group of battery cells (202). The second heat exchange part (121) and at least one of the first heat exchange parts (111) of the first heat exchange section (11) are in contact with the first group of battery cells (202) to perform heat exchange.

16. The battery according to claim 15, characterized in that, The plurality of first heat exchange parts (111) of the first heat exchange section (11) extend along the third direction and are sequentially connected in the first direction; or, the plurality of first heat exchange parts (111) of the first heat exchange section (11) extend along the first direction and are sequentially connected in the third direction.

17. The battery according to claim 15, characterized in that, The first heat exchange section (11) has a plurality of first heat exchange parts (111) extending along the first direction and connected sequentially in the third direction. The first end of the third heat exchange part (122) is connected at an angle to the second heat exchange part (121). The second end of the third heat exchange part (122) is connected to the one of the plurality of first heat exchange parts (111) that is farthest from the second heat exchange part (121) along the third direction. The second end of the third heat exchange part (122) is connected at an angle to the first heat exchange section (11).

18. The battery according to claim 17, characterized in that, The first heat exchange channel (10) further includes: a third heat exchange section (13), which is connected to the end of the first heat exchange section (11) away from the second heat exchange section (12) and is connected to the first heat exchange section (11) at an angle. The third heat exchange section (13) is arranged on the side of the first heat exchange section (11) away from the third heat exchange part (122) and is connected to the one of the plurality of first heat exchange parts (111) that is closest to the second heat exchange part (121) along the third direction. The battery assembly (200) also has a fifth group of battery cells (206), and a plurality of battery cells (2011) of the fifth group of battery cells (206) are stacked along the third direction. The fifth group of battery cells (206) is arranged adjacent to the third group of battery cells (204), wherein the third heat exchange section (13) and the fourth heat exchange section (125) are both in contact with the third group of battery cells (204) to enable heat exchange; or, the third heat exchange section (13) is in contact with the fifth group of battery cells (206) to enable heat exchange, and the fourth heat exchange section (125) is in contact with the third group of battery cells (204) to enable heat exchange; or, the third heat exchange section (13) is in contact with the third group of battery cells (204) to enable heat exchange, and the fourth heat exchange section (125) is arranged on the outer side of the battery assembly (200) in the first direction.

19. The battery according to claim 18, characterized in that, Also includes: The first inlet / outlet section (15) has one end connected at an angle to the third heat exchange section (13), and the other end of the first inlet / outlet section (15) forms the first inlet / outlet of the first heat exchange channel (10); the second inlet / outlet section (17) has one end connected at an angle to the fourth heat exchange section (125), and the other end of the second inlet / outlet section (17) forms the second inlet / outlet of the first heat exchange channel (10), and one of the first inlet / outlet and the second inlet / outlet is the inlet of the first heat exchange channel (10) and the other is the outlet.

20. The battery according to any one of claims 13-19, characterized in that, The first heat exchange section (11) includes a plurality of first heat exchange parts (111), which are arranged at intervals and connected by bending in sequence. The plurality of first heat exchange parts (111) and second heat exchange parts (121) extend along the first direction and are arranged at intervals in the third direction. One battery cell (201) is attached to one second heat exchange part (121) and at least one first heat exchange part (111) to perform heat exchange; or, one battery cell (201) is attached to at least two first heat exchange parts (111) to perform heat exchange.

21. The battery according to claim 20, characterized in that, The number of the first heat exchange channels (10) is two, and each first heat exchange channel (10) includes: five first heat exchange sections (111), one second heat exchange section (121), one third heat exchange section (122), one fourth heat exchange section (125), and one third heat exchange segment (13). The number of battery cells (201) is four. The battery cell (201) located at the end of the third direction is attached to two of the first heat exchange sections (111) and one of the second heat exchange sections (121) to perform heat exchange. Any other battery cell (201) is attached to three of the first heat exchange sections (111) to perform heat exchange. The battery assembly (200) also has a fifth group of battery cells (206). The plurality of battery cells (2011) of the fifth group of battery cells (206) are stacked along the third direction, and the fifth group of battery cells (206) The battery is arranged adjacent to the third group of battery cells (204). The third heat exchange section (122) is connected to the second heat exchange section (121) and the first heat exchange section (111) which is furthest from the second heat exchange section (121), and is attached to the second group of battery cells (203) to exchange heat. The third heat exchange section (13) is connected to the first heat exchange section (111) which is closest to the second heat exchange section (121), and is attached to the fifth group of battery cells (206) to exchange heat. The fourth heat exchange section (125) is attached to the third group of battery cells (204) to exchange heat. The battery also includes a housing (300), which includes a first part and a second part. The first part and the second part cover each other, and the first part and the second part together define a receiving space for accommodating the battery cells (2011).

22. The battery according to claim 20, characterized in that, The number of the first heat exchange channels (10) is two, and each first heat exchange channel (10) includes: five first heat exchange sections (111), one second heat exchange section (121), one third heat exchange section (122), one fourth heat exchange section (125), and one third heat exchange segment (13). The number of battery cells (201) is six. The battery cell (201) located at the end of the third direction is attached to one first heat exchange section (111) and one second heat exchange section (121) to exchange heat. Any of the remaining battery cells (201) is attached to two first heat exchange sections (111) to exchange heat. The battery assembly (200) also has a fifth group of battery cells (206). The plurality of battery cells (2011) of the fifth group of battery cells (206) are stacked along the third direction, and the fifth group of battery cells (206) and The third group of battery cells (204) are arranged adjacent to each other. The third heat exchange section (122) is connected to the second heat exchange section (121) and the first heat exchange section (111) which is furthest from the second heat exchange section (121), and is in contact with the second group of battery cells (203) to exchange heat. The third heat exchange section (13) is connected to the first heat exchange section (111) which is closest to the second heat exchange section (121), and is in contact with the fifth group of battery cells (206) to exchange heat. The fourth heat exchange section (125) is in contact with the third group of battery cells (204) to exchange heat. The battery also includes a housing (300), which includes a first part and a second part. The first part and the second part cover each other, and the first part and the second part together define a receiving space for accommodating the battery cells (2011).

23. The battery according to claim 20, characterized in that, The number of the first heat exchange channels (10) is two. Each first heat exchange channel (10) includes: three first heat exchange sections (111), one second heat exchange section (121), one third heat exchange section (122), one fourth heat exchange section (125), and one third heat exchange segment (13). The number of battery cells (201) is four. The battery cell (201) located at the end of the third direction is in contact with one first heat exchange section (111) and one second heat exchange section (121) to exchange heat. Any of the remaining battery cells (201) is in contact with two first heat exchange sections (111) to exchange heat. The battery assembly (200) also has a fifth group of battery cells (206). The plurality of battery cells (2011) of the fifth group of battery cells (206) are stacked along the third direction, and the fifth group of battery cells (206) and The third group of battery cells (204) are arranged adjacent to each other. The third heat exchange section (122) is connected to the second heat exchange section (121) and the first heat exchange section (111) which is furthest from the second heat exchange section (121), and is in contact with the second group of battery cells (203) to exchange heat. The third heat exchange section (13) is connected to the first heat exchange section (111) which is closest to the second heat exchange section (121), and is in contact with the fifth group of battery cells (206) to exchange heat. The fourth heat exchange section (125) is in contact with the third group of battery cells (204) to exchange heat. The battery also includes a housing (300), which includes a first part and a second part. The first part and the second part cover each other, and the first part and the second part together define a receiving space for accommodating the battery cells (2011).

24. The battery according to any one of claims 21-23, characterized in that, The number of battery cells (2011) in each battery cell (201) is 30.

25. The battery according to any one of claims 13-19, characterized in that, The first heat exchange section (11) is connected downstream of the second heat exchange section (12) in the direction of fluid flow; or, the heat exchange tube is configured such that: when heating the battery assembly (200) of the battery, the first heat exchange section (11) is connected downstream of the second heat exchange section (12) in the direction of fluid flow; and when cooling the battery assembly (200) of the battery, the first heat exchange section (11) is connected upstream of the second heat exchange section (12) in the direction of fluid flow.

26. The battery according to any one of claims 13-19, characterized in that, The number of heat exchange tubes is one or more, and the inner side of each heat exchange tube defines a heat exchange flow channel. When the number of heat exchange tubes is multiple, the multiple heat exchange tubes are arranged at intervals along a third direction or arranged around each other, and the heat exchange flow channel of at least one heat exchange tube is formed as the first heat exchange flow channel (10).

27. The battery according to claim 26, characterized in that, The number of heat exchange tubes is multiple, and the heat exchange channel of at least one of the heat exchange tubes is formed as a second heat exchange channel (30). The structure of any second heat exchange channel (30) is the same as or different from the structure of the first heat exchange channel (10).

28. The battery according to claim 26, characterized in that, The number of heat exchange tubes is multiple, one of which defines the first heat exchange channel (10), and the heat exchange channel of at least one heat exchange tube is formed as a third heat exchange channel (40). The third heat exchange channel (40) is bent within the U-shaped region of the first heat exchange channel (10), and the first heat exchange channel (10) and the third heat exchange channel (40) are bent in the same plane. The bending structures of the first heat exchange channel (10) and the third heat exchange channel (40) are the same or different.

29. The battery according to claim 28, characterized in that, The third heat exchange channel (40) includes a U-shaped region with the same structure as the first heat exchange channel (10), and at least a portion of the first heat exchange section (11) of the first heat exchange channel (10) is located within the U-shaped region of the third heat exchange channel (40).

30. The battery according to any one of claims 1-11, characterized in that, The heat exchange tube is formed by bending a single tube.

31. The battery according to claim 30, characterized in that, The heat exchange tube is bent in an arc shape at the bend position.

32. The battery according to any one of claims 1-11, characterized in that, The heat exchange tube is an aluminum tube.

33. The battery according to any one of claims 1-11, characterized in that, The wall thickness of the heat exchange tube is 0.2mm-3mm.

34. The battery according to claim 33, characterized in that, The wall thickness of the heat exchange tube is 0.5mm-1.2mm.

35. The battery according to any one of claims 1-11, characterized in that, The width of the heat exchange channel is 3mm-200mm.

36. The battery according to claim 35, characterized in that, The width of the heat exchange channel is 5mm-80mm.

37. The battery according to any one of claims 1-11, characterized in that, The height of the heat exchange channel in the second direction is 1mm-20mm.

38. The battery according to claim 37, characterized in that, The height of the heat exchange channel in the second direction is 4mm-6mm.

39. The battery according to any one of claims 1-11, characterized in that, The heat exchange fluid in the heat exchange channel is a mixture of water and ethylene glycol; and / or, the thermal conductivity of the heat exchange fluid in the heat exchange channel is greater than or equal to 0.3 W / (m·K).

40. The battery according to claim 39, characterized in that, The heat exchange fluid is a mixture of 50% water and 50% ethylene glycol; and / or, the thermal conductivity of the heat exchange fluid in the heat exchange channel is 0.328 W / (m·K)-0.417 W / (m·K).

41. The battery according to any one of claims 1-11, characterized in that, The casing of the battery cell (2011) is made of aluminum.

42. The battery according to any one of claims 1-11, characterized in that, The casing of the battery cell (2011) is made of ternary aluminum alloy or pentylene aluminum alloy.

43. The battery according to any one of claims 1-11, characterized in that, The length of the battery cell (2011) is 154mm-234mm; and / or, the width of the battery cell (2011) is 63mm-103mm; and / or, the wall thickness of the casing of the battery cell (2011) is 0.4mm-1mm.

44. The battery according to any one of claims 1-11, characterized in that, The battery also includes a housing (300), the housing (300) includes a housing body (301), the housing body (301) is an integral stamped part and includes a bottom wall and a surrounding wall, and the battery assembly (200) is disposed inside the housing body (301).

45. The battery according to claim 44, characterized in that, The thermal management system of the battery includes a temperature regulating component (500), which includes at least one of a first temperature regulating component (501) and a second temperature regulating component (502). The first temperature regulating component (501) is disposed outside the housing body (301) and is attached to the outer wall of the housing body (301). The second temperature regulating component (502) is disposed inside the housing body (300) and is located between the outer peripheral surface of the battery cell (2011) and the housing body (300). At least one of the first temperature regulating component (501) and the second temperature regulating component (502) forms the heat exchange component (100).

46. ​​The battery according to claim 45, characterized in that, The thermal management system of the battery also includes a third temperature regulating component (503), which is disposed inside the housing (300) and located between two adjacent battery cells (2011). The structure of the third temperature regulating component (503) is the same as or different from that of the heat exchange component (100).

47. An electrical appliance, characterized in that, Includes the battery according to any one of claims 1-46.

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