Battery and electric device having the same

Abstract

The present application discloses a battery and an electrical device having the same, wherein the battery comprises: a battery assembly, wherein the battery assembly comprises a battery cell, wherein the battery cell comprises a plurality of battery cells stacked in a first direction; a heat exchanger, which is arranged on one side of the battery assembly in a second direction, wherein the first direction and the second direction intersect, wherein the heat exchanger comprises a heat exchange tube, wherein the heat exchange tube has a heat exchange flow channel, and the heat exchange flow channel is bent and extended on the surface of one side of the battery assembly in the second direction, wherein the wall surface where the battery cell and the heat exchange tube cooperate is taken as the projection surface, and the area of ​​the positive projection of the heat exchange tube on the wall surface is greater than or equal to 15% of the wall surface area. According to the battery of the present application, 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 in the battery assembly more uniform, making the battery operation more stable and reliable, and making the battery maintain good battery performance.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery and an electrical device having the same. Background Art

[0002] A good operating environment is one of the necessary conditions for many parts, electronic devices, components, devices, equipment, etc. to operate stably and efficiently for a long time. Maintaining a good operating environment plays a more important role in the good operation of parts, electronic devices, components, devices, equipment, etc.

[0003] At present, a heat dissipation structure is usually provided inside the battery to dissipate heat or increase the temperature of the battery so that the battery can operate at an appropriate temperature in hot or cold weather. However, in the related technology, there are a large number of battery cells in the battery pack, and the temperature rise rate and temperature uniformity of each battery cell under the heat exchange action of the heat exchange component need to be further improved.

[0004] Application Contents

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a battery that can improve the heat exchange rate and improve the heat exchange effect of the battery cells, so that the battery can operate stably and well, and the battery can maintain good battery performance.

[0006] In the first aspect, an embodiment of the present application provides a battery, comprising: a battery assembly, the battery assembly comprising a battery cell, the battery cell comprising a plurality of battery cells stacked along a first direction; a heat exchange element, arranged on one side of the battery assembly in a second direction, the first direction and the second direction intersecting, the heat exchange element comprising a heat exchange tube, the heat exchange tube having a heat exchange channel, the heat exchange channel bending and extending on a surface of one side of the battery assembly in the second direction, wherein the wall surface where the battery cell and the heat exchange tube cooperate is used as a projection surface, and the area of ​​the positive projection of the heat exchange tube on the wall surface is greater than or equal to 15% of the wall area.

[0007] In the above embodiment, 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 in the battery assembly more uniform, making the battery operation more stable and reliable, and allowing the battery to maintain good battery performance.

[0008] In some embodiments of the present application, the thickness of the battery cell in the first direction is greater than or equal to 40 mm, and the area of ​​the orthographic projection of the heat exchange tube on the wall surface is greater than or equal to 30% of the area of ​​the wall surface.

[0009] In the above embodiment, 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 40 mm, the heat exchange contact area between the heat exchange tube and the battery cell can be better matched with the heat exchange demand of the battery cell after the thickness is increased, so that the battery assembly can be better maintained in a suitable temperature range, thereby making the temperature uniformity of the battery assembly better and the battery operation more stable.

[0010] In some embodiments of the present 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 orthographic projection of the heat exchange tube on the wall is greater than or equal to 15% and less than 30% of the wall area.

[0011] In the above embodiment, by setting the ratio of the heat exchange area of ​​the battery cell to the wall area to be greater than or equal to 15% and less than 30% when the thickness of the battery cell is greater than or equal to 30 mm and less than 40 mm, the heat exchange contact area between the heat exchange tube and the battery cell can be well matched with the heat exchange demand of the battery cell after the thickness is increased, so that the battery assembly can be well maintained in a suitable temperature range, thereby making the temperature distribution in the battery assembly more uniform and the battery operation more stable.

[0012] In some embodiments of the present application, the thickness of the battery cell in the first direction is greater than or equal to 50 mm, and the area of ​​the orthographic projection of the heat exchange tube on the wall surface is greater than or equal to 45% of the wall surface area.

[0013] In the above embodiment, 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 demand of the battery cell after the thickness is increased, so that the battery assembly can be better maintained in a suitable temperature range, thereby making the temperature uniformity of the battery assembly better and the battery operation more stable.

[0014] In some embodiments of the present 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 orthographic projection of the heat exchange tube on the wall is greater than or equal to 30% and less than 45% of the wall area.

[0015] In the above embodiment, 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% and less than 45% when the thickness of the battery cell is greater than or equal to 40 mm and less than 50 mm, the heat exchange contact area between the heat exchange tube and the battery cell can be well matched with the heat exchange demand of the battery cell after the thickness is increased, so that the battery assembly can be well maintained in a suitable temperature range, thereby making the temperature distribution in the battery assembly more uniform and the battery operation more stable.

[0016] In some embodiments of the present application, the thickness of the battery cell in the first direction is greater than or equal to 60 mm, and the area of ​​the orthographic projection of the heat exchange tube on the wall surface is greater than or equal to 65% of the wall surface area.

[0017] In the above embodiment, 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 60 mm, the heat exchange contact area between the heat exchange tube and the battery cell can be better matched with the heat exchange demand of the battery cell after the thickness is increased, so that the battery assembly can be better maintained in a suitable temperature range, thereby making the temperature uniformity of the battery assembly better and the battery operation more stable.

[0018] In some embodiments of the present 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 orthographic projection of the heat exchange tube on the wall is greater than or equal to 45% and less than 65% of the wall area.

[0019] In the above embodiment, 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% and less than 65% when the thickness of the battery cell is greater than or equal to 50 mm and less than 60 mm, the heat exchange contact area between the heat exchange tube and the battery cell can be well matched with the heat exchange demand of the battery cell after the thickness is increased, so that the battery assembly can be well maintained in a suitable temperature range, thereby making the temperature distribution in the battery assembly more uniform and the battery operation more stable.

[0020] In some embodiments of the present application, the thickness of the battery cell in the first direction is greater than or equal to 80 mm, and the area of ​​the orthographic projection of the heat exchange tube on the wall surface is greater than or equal to 75% of the area of ​​the wall surface.

[0021] In the above embodiment, 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 demand of the battery cell after the thickness is increased, so that the battery assembly can be better maintained in a suitable temperature range, thereby making the temperature uniformity of the battery assembly better and the battery operation more stable.

[0022] In some embodiments of the present 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 orthographic projection of the heat exchange tube on the wall is greater than or equal to 65% and less than 75% of the wall area.

[0023] In the above embodiment, 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% and less than 75% when the thickness of the battery cell is greater than or equal to 60 mm and less than 80 mm, the heat exchange contact area between the heat exchange tube and the battery cell can be well matched with the heat exchange demand of the battery cell after the thickness is increased, so that the battery assembly can be well maintained in a suitable temperature range, thereby making the temperature distribution in the battery assembly more uniform and the battery operation more stable.

[0024] In some embodiments of the present application, the thickness of the battery cell in the first direction is greater than 100 mm, and the area of ​​the orthographic projection of the heat exchange tube on the wall surface is greater than or equal to 90% of the area of ​​the wall surface.

[0025] In the above embodiment, 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 100 mm, the heat exchange contact area between the heat exchange tube and the battery cell can be better matched with the heat exchange demand of the battery cell after the thickness is increased, so that the battery assembly can be better maintained in a suitable temperature range, thereby making the temperature uniformity of the battery assembly better and the battery operation more stable.

[0026] In some embodiments of the present 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 orthographic projection of the heat exchange tube on the wall is greater than or equal to 75% and less than 90% of the wall area.

[0027] In the above embodiment, 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% and less than 90% when the thickness of the battery cell is greater than or equal to 80 mm and less than or equal to 100 mm, the heat exchange contact area between the heat exchange tube and the battery cell can be well matched with the heat exchange demand of the battery cell after the thickness is increased, so that the battery assembly can be well maintained in a suitable temperature range, thereby making the temperature distribution in the battery assembly more uniform and the battery operation more stable.

[0028] In some embodiments of the present application, the heat exchange channel includes a first heat exchange channel, the first heat exchange channel includes a first heat exchange section and a second heat exchange section; the second heat exchange section is bent to form a U-shaped area, the first heat exchange section is bent and arranged in the U-shaped area, and is bent and connected to the second heat exchange section, the battery assembly is located at the outermost battery cells in the circumferential direction to form peripheral battery cells, and at least a portion of the second heat exchange section is in contact with the peripheral battery cells.

[0029] In the above embodiment, by providing a first heat exchange channel in the heat exchange element, 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 a portion of it is in contact with the peripheral battery cell, and the first heat exchange section is arranged in the U-shaped area, so that the heat exchange element has better heat dissipation and cooling effects and heating and heating effects when performing heat exchange operations on the battery assembly, and the temperature distribution in the battery is more uniform, so that the battery operation is more stable and good battery performance can be maintained.

[0030] In one embodiment of the present application, the peripheral battery cells include 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 multiple battery cells included in the first group of battery cells are stacked along a first direction, the multiple battery cells included in the second group of battery cells are stacked along a third direction, and the multiple battery cells included in the third group of battery cells are stacked along the third direction, and 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 that are connected; the second heat exchange part extends and fits to the first group of battery cells to enable heat exchange, and / or the third heat exchange part extends and fits to the second group of battery cells to enable heat exchange, and / or the fourth heat exchange part extends and fits to the third group of battery cells to enable heat exchange.

[0031] In the above embodiment, by arranging the second heat exchange part, the third heat exchange part and the fourth heat exchange part in the second heat exchange section to fit 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 peripheral battery cells for heat exchange, the heat exchange component can stably and reliably cool or heat the peripheral battery cells, so that the battery assembly can have a good heat exchange effect, thereby making the battery operation more stable. When the heat exchange component performs heat exchange operations on the battery assembly, the temperature distribution inside the battery is more uniform.

[0032] In some examples of the present application, the peripheral battery cells also include a fourth group of battery cells, the fourth group of battery cells include multiple battery cells arranged along a first direction, the second heat exchange section also includes a fifth heat exchange part, the fifth heat exchange part closes at least part of the opening of the U-shaped area formed by the second heat exchange part, the third heat exchange part and the fourth heat exchange part, and the fifth heat exchange part extends and fits the fourth group of battery cells to enable heat exchange.

[0033] In the above embodiment, a fifth heat exchange portion is provided in the second heat exchange section to be bonded to the fourth group of battery cells, so that the second heat exchange section can perform heat exchange on the four sides of the battery assembly. In this way, the second heat exchange section of a first heat exchange channel can perform heat exchange on the four sides of the battery assembly. This can improve the heat exchange effect on the four sides of the battery assembly and enhance the temperature uniformity of the battery assembly.

[0034] In some examples of the present application, the first heat exchange section includes a plurality of first heat exchange parts, which are arranged at intervals and connected by bending in sequence, and at least one battery unit located at both ends in the third direction is a first group of battery cells, and the second heat exchange part and at least one first heat exchange part of the first heat exchange section are jointly attached to the first group of battery cells to enable heat exchange.

[0035] In the above embodiment, by providing a plurality of first heat exchange parts in the first heat exchange section, the plurality of first heat exchange parts are arranged at intervals and connected in sequence, the structure is simple and the arrangement is convenient, so that the heat exchange part can well exchange heat with the battery assembly. At least one first heat exchange part is provided to cooperate with the second heat exchange part to fit the first group of battery cells, so that the heat exchange part and each battery cell in the first group of battery cells have sufficient heat exchange area for heat exchange, so that the heat exchange part has a good heat exchange effect.

[0036] In an example of the present application, the plurality of first heat exchange parts of the first heat exchange section extend along the third direction and are sequentially connected in the first direction; or, the plurality of first heat exchange parts of the first heat exchange section extend along the first direction and are sequentially connected in the third direction.

[0037] In the above-mentioned embodiment, by arranging the multiple first heat exchange parts of the first heat exchange section to extend along the third direction and to be connected sequentially in the first direction, a single first heat exchange part and a single battery cell can have a larger heat exchange area, so that when the heat exchange component is arranged on the battery assembly, it can more conveniently and reliably meet the requirements of the heat exchange area of ​​the battery assembly, and to a certain extent, the difficulty of arranging the first heat exchange section can be reduced; by arranging the multiple first heat exchange parts to extend along the first direction and to be connected sequentially in the third direction, a battery cell can be heat exchanged by the cooperation of the multiple first heat exchange parts to meet the required heat exchange area, so that when the first heat exchange section is bent, the first heat exchange section can have a smaller number of bends, so that the flow resistance in the first heat exchange section is smaller, and the heat exchange fluid flows more smoothly and the pressure drop is reduced in the first heat exchange section, so that the heat exchange component can better perform heat exchange operations on the battery assembly.

[0038] In an example of the present application, multiple first heat exchange parts of the first heat exchange section extend along the first direction and are sequentially connected in the third direction, the first end of the third heat exchange part is connected to the second heat exchange part at an angle, the second end of the third heat exchange part is connected to one of the multiple first heat exchange parts that is farthest from the second heat exchange part along the third direction, and the second end of the third heat exchange part is connected to the first heat exchange section at an angle.

[0039] In the above embodiment, by connecting the third heat exchange section with the second heat exchange section at an angle and connecting the third heat exchange section with the first heat exchange section at an angle, the second heat exchange section and the first heat exchange section can be arranged more conveniently when assembled in the battery, which can meet the layout requirements of the heat exchange components and the battery assembly, has a simple structure and is easy to use.

[0040] In some specific embodiments of the present application, the first heat exchange channel also includes: a third heat exchange section, the third heat exchange section is connected to one end of the first heat exchange section away from the second heat exchange section, and is connected to the first heat exchange section at an angle, the third heat exchange section is arranged on the side of the first heat exchange section away from the third heat exchange part, and is connected to the one of the multiple first heat exchange parts that is closest to the second heat exchange part along the third direction; the battery assembly also has a fifth group of battery cells, multiple battery cells of the fifth group of battery cells are stacked along the third direction, and the fifth group of battery cells are arranged adjacent to the third group of battery cells, wherein the third heat exchange section and the fourth heat exchange part are both attached to the third group of battery cells to enable heat exchange; or, the third heat exchange section is attached to the fifth group of battery cells to enable heat exchange, and the fourth heat exchange part is attached to the third group of battery cells to enable heat exchange; or, the third heat exchange section is attached to the third group of battery cells to enable heat exchange, and the fourth heat exchange part is arranged on the outside of the battery assembly in the first direction.

[0041] In the above embodiment, by setting the third heat exchange section connected to the first heat exchange section and attached to the second group of battery cells, when the heat exchange element performs heat exchange operation on the battery assembly, the flow direction of the heat exchange fluid in the second heat exchange part can be opposite to the flow direction of the heat exchange fluid near the second heat exchange part, the flow direction of the heat exchange fluid in the third heat exchange part 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, so that the second heat exchange section, the first heat exchange section and the third heat exchange section can better cooperate to perform heat exchange operation, so that the heat exchange element can perform heat exchange operation on battery cells at different positions in the battery more balanced and good, so that the temperature distribution of the battery after the heat exchange operation can be more uniform, so that the battery can operate more stably and reliably and maintain good battery performance.

[0042] In the above embodiment, by coordinating the third heat exchange section and the fourth heat exchange part to fit the third group of battery cells, the heat exchange element 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 has a good heat exchange effect; the fourth heat exchange part is fitted with the third group of battery cells and the third heat exchange section is fitted with the fifth group of battery cells, so that the fourth heat exchange part and the third heat exchange section of the heat exchange element can be arranged more conveniently; 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 the heat exchange fluid in the heat exchange element.

[0043] In a specific embodiment of the present application, the first heat exchange channel also includes: a first entrance and exit section, one end of the first entrance and exit section is connected to the third heat exchange section at an angle, and the other end of the first entrance and exit section forms a first entrance and exit of the first heat exchange channel; a second entrance and exit section, one end of the second entrance and exit section is connected to the fourth heat exchange section at an angle, and the other end of the second entrance and exit section forms a second entrance and exit of the first heat exchange channel, one of the first entrance and exit and the second entrance and exit is an inlet of the first heat exchange channel and the other is an outlet.

[0044] In the above embodiment, by setting the first inlet and outlet section and the second inlet and outlet section, it is convenient for an external liquid injection device to introduce the heat exchange fluid used 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.

[0045] In some examples of the present application, the first heat exchange section includes a plurality of first heat exchange parts, the plurality of first heat exchange parts are arranged at intervals and connected by sequential bending, the plurality of first heat exchange parts and second heat exchange parts both extend along the first direction and are arranged at intervals in the third direction, a battery unit is fitted with a second heat exchange part and at least one first heat exchange part to enable heat exchange; or, a battery unit is fitted with at least two first heat exchange parts to enable heat exchange.

[0046] In the above embodiment, by arranging a battery unit to be bonded with a second heat exchange part and at least one first heat exchange part or arranging a battery unit to be bonded with at least two first heat exchange parts, the heat exchange element can more conveniently meet the heat exchange area requirements of each battery cell in the battery unit. The first heat exchange part and the second heat exchange part both extend along the first direction and are arranged at intervals in the third direction, which can make the heat exchange element more convenient to arrange in the battery and make the overall structure of the first heat exchange section and the second heat exchange section in the first heat exchange channel more compact.

[0047] In an example of the present application, the number of first heat exchange channels is two, each of which includes: five first heat exchange parts, one second heat exchange part, one third heat exchange part, one fourth heat exchange part and a third heat exchange section, the number of battery cells is four, the battery cell at the end in the third direction is bonded to two first heat exchange parts and one second heat exchange part to enable heat exchange, and any remaining battery cells are bonded to three first heat exchange parts to enable heat exchange, the battery assembly also has a fifth group of battery cells, multiple battery cells of the fifth group of battery cells are stacked along the third direction, and the fifth group of battery cells are arranged adjacent to the third group of battery cells, the third heat exchange part connects the second heat exchange part and the first heat exchange part farthest from the second heat exchange part, and is bonded to the second group of battery cells to enable heat exchange, the third heat exchange section connects the first heat exchange part closest to the second heat exchange part, and is bonded to the fifth group of battery cells to enable heat exchange, and the fourth heat exchange part is bonded to the third group of battery cells to enable heat exchange.

[0048] In the above embodiment, by setting two first heat exchange channels to exchange heat with the battery assembly, the structure is simple and the arrangement is convenient, which can improve the heat exchange efficiency of the heat exchange element to a certain extent, so that the heat exchange element can better perform heat exchange operations on the battery assembly. Five first heat exchange parts, one second heat exchange part, one third heat exchange part, one fourth heat exchange part and one third heat exchange section are set in the first heat exchange channel, so that the first heat exchange channel and the two battery units have sufficient heat exchange area to meet the heat exchange needs and improve the heat exchange rate.

[0049] The above arrangement of the first heat exchange section, the second heat exchange section and the third heat exchange section in the first heat exchange channel can make the heat exchange components cooperate well with the heat exchange conditions of battery cells at different positions in the battery during heat exchange operations, so that battery cells at different positions of the battery assembly can obtain a more uniform heat exchange effect, thereby making the temperature distribution in the battery more uniform during the heat exchange operation, making the battery operation more stable and maintaining good battery performance.

[0050] In an example of the present application, the number of first heat exchange channels is two, each of which includes: five first heat exchange parts, one second heat exchange part, one third heat exchange part, one fourth heat exchange part and a third heat exchange section, the number of battery cells is six, the battery cell at the end in the third direction is bonded to a first heat exchange part and a second heat exchange part to enable heat exchange, and any remaining battery cells are bonded to two first heat exchange parts to enable heat exchange, the battery assembly also has a fifth group of battery cells, multiple battery cells of the fifth group of battery cells are stacked along the third direction, and the fifth group of battery cells are arranged adjacent to the third group of battery cells, the third heat exchange part connects the second heat exchange part and the first heat exchange part farthest from the second heat exchange part, and is bonded to the second group of battery cells to enable heat exchange, the third heat exchange section connects the first heat exchange part closest to the second heat exchange part, and is bonded to the fifth group of battery cells to enable heat exchange, and the fourth heat exchange part is bonded to the third group of battery cells to enable heat exchange.

[0051] In the above embodiment, by setting two first heat exchange channels to exchange heat with the battery assembly, the structure is simple and the arrangement is convenient, which can improve the heat exchange efficiency of the heat exchange element to a certain extent, so that the heat exchange element can better perform heat exchange operations on the battery assembly. Five first heat exchange parts, one second heat exchange part, one third heat exchange part, one fourth heat exchange part and one third heat exchange section are set in the first heat exchange channel, so that the first heat exchange channel and the two battery units have sufficient heat exchange area to meet the heat exchange needs and improve the heat exchange rate.

[0052] The above arrangement of the first heat exchange section, the second heat exchange section and the third heat exchange section in the first heat exchange channel can make the heat exchange components cooperate well with the heat exchange conditions of battery cells at different positions in the battery during heat exchange operations, so that battery cells at different positions of the battery assembly can obtain a more uniform heat exchange effect, thereby making the temperature distribution in the battery more uniform during the heat exchange operation, making the battery operation more stable and maintaining good battery performance.

[0053] In an example of the present application, the number of first heat exchange channels is two, and each first heat exchange channel includes: three first heat exchange parts, one second heat exchange part, one third heat exchange part, one fourth heat exchange part and a third heat exchange section. The number of battery cells is four. The battery cell at the end located in the third direction is bonded to a first heat exchange part and a second heat exchange part to enable heat exchange, and any remaining battery cells are bonded to two first heat exchange parts to enable exchange. The battery assembly also has a fifth group of battery cells, and multiple battery cells of the fifth group of battery cells are stacked along the third direction, and the fifth group of battery cells are arranged adjacent to the third group of battery cells. The third heat exchange part connects the second heat exchange part and the first heat exchange part farthest from the second heat exchange part, and is bonded to the second group of battery cells to enable heat exchange. The third heat exchange section is connected to the first heat exchange part closest to the second heat exchange part, and is bonded to the fifth group of battery cells to enable heat exchange, and the fourth heat exchange part is bonded to the third group of battery cells to enable heat exchange.

[0054] In the above embodiment, by setting two first heat exchange channels to exchange heat with the battery assembly, the structure is simple and the arrangement is convenient, which can improve the heat exchange efficiency of the heat exchange element to a certain extent, so that the heat exchange element can better perform heat exchange operations on the battery assembly. Three first heat exchange parts, one second heat exchange part, one third heat exchange part, one fourth heat exchange part and one third heat exchange section are set in the first heat exchange channel, so that the first heat exchange channel and the two battery units have sufficient heat exchange area to meet the heat exchange needs and improve the heat exchange rate.

[0055] The above arrangement of the first heat exchange section, the second heat exchange section and the third heat exchange section in the first heat exchange channel can make the heat exchange components cooperate well with the heat exchange conditions of battery cells at different positions in the battery during heat exchange operations, so that battery cells at different positions of the battery assembly can obtain a more uniform heat exchange effect, thereby making the temperature distribution in the battery more uniform during the heat exchange operation, making the battery operation more stable and maintaining good battery performance.

[0056] In one example of the present application, the number of battery cells in each battery unit is 30.

[0057] In the above embodiment, 30 battery cells are arranged in each battery unit, which can better meet the use requirements of the battery.

[0058] In some examples of the present application, the first heat exchange section is connected to the downstream of the second heat exchange section along the direction of fluid flow; or, the heat exchange tube is configured as follows: when heating the battery assembly of the battery, the first heat exchange section is connected to the downstream of the second heat exchange section along the direction of fluid flow; when cooling the battery assembly of the battery, the first heat exchange section is connected to the upstream of the second heat exchange section along the direction of fluid flow.

[0059] In the above embodiment, by determining the upstream and downstream relationship of the first heat exchange section and the second heat exchange section in the heat exchange element in the fluid flow direction according to the heat exchange conditions of the heat exchange element, the heat exchange element can adjust the flow direction of the fluid accordingly according to the heating or cooling needs of the battery assembly, so that the heat exchange element can better heat the battery assembly or cool it down, and the heat exchange element can well cooperate with the heat dissipation conditions and heat exchange needs of different positions in the battery assembly to perform heat exchange operations, so that the heat dissipation and heating effects of the battery assembly are better, and after the battery assembly is heat exchanged, the temperature distribution in the battery is more uniform, so that the battery operation is more stable, and the battery can maintain good battery performance.

[0060] In some examples of the present application, the number of heat exchange tubes is one or more, and a heat exchange channel is defined on the inner side of each heat exchange tube. When the number of heat exchange tubes is multiple, the multiple heat exchange tubes are arranged at intervals along a third direction, or are arranged around each other, and the heat exchange channel of at least one heat exchange tube is formed as a first heat exchange channel.

[0061] In the above-mentioned embodiment, 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, so as to better meet the heat exchange needs of different batteries; 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, so that the heat exchange element is more convenient in design and arrangement; multiple first heat exchange channels are arranged to be arranged around each other, so that the multiple first heat exchange channels in the heat exchange element can have better integrity, and the overall structural arrangement of the heat exchange element can be more flexible and compact, so that the heat exchange element can better meet the heat exchange area requirements of battery cells at different positions in the battery assembly.

[0062] In one example of the present 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 is the same as or different from that of the first heat exchange channel.

[0063] In the above embodiment, by providing at least one second heat exchange channel, the diversity of the arrangement of the heat exchange channels can be increased, so that the heat exchange element can better exchange heat with the battery assembly, thereby improving the heat exchange effect of the heat exchange element.

[0064] In an example of the present application, there are multiple heat exchange tubes, one of which defines a first heat exchange channel, and the heat exchange channel of at least one heat exchange tube is formed as a third heat exchange channel, the third heat exchange channel is bent in the U-shaped area of ​​the first heat exchange channel, and the first heat exchange channel and the third heat exchange channel are bent in the same plane, and the bending structures of the first heat exchange channel and the third heat exchange channel are the same or different.

[0065] In the above embodiment, by providing multiple heat exchange channels, the diversity of the heat exchange channels can be increased, so that the arrangement of the 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 component and improving the temperature uniformity of the battery.

[0066] In some specific embodiments of the present application, the third heat exchange channel includes a U-shaped region with the same structure as the first heat exchange channel, and at least part of the first heat exchange section of the first heat exchange channel is arranged in the U-shaped region of the third heat exchange channel.

[0067] In the above embodiment, by setting the third heat exchange channel to include a U-shaped area with the same structure as the first heat exchange channel, at least a portion of the first heat exchange section of the first heat exchange channel is arranged in the U-shaped area of ​​the third heat exchange channel, so that at least a portion of the first heat exchange channel and the third heat exchange channel can be arranged around each other. In this way, the winding method of the heat exchange channel can be arranged according to the heat exchange requirements of various parts of the battery assembly, thereby further increasing the heat exchange effect of the heat exchange component and improving the temperature uniformity of the battery.

[0068] In some embodiments of the present application, the heat exchange tube is formed by bending a single tube.

[0069] In the above embodiment, by setting the heat exchange tube to be formed by bending a single tube, the number of welding points of the heat exchanger can be reduced, thereby reducing the risk of leakage of the heat exchanger and improving the reliability of the heat exchanger. At the same time, the operation process of bending a single tube is simpler than the manufacturing process of a plate structure, and less material is used, which can significantly reduce the cost of the heat exchanger.

[0070] In one embodiment of the present application, the heat exchange tube is formed by bending a single tube, and the heat exchange tube is bent in an arc shape at the bending position.

[0071] In the above embodiment, by setting the heat exchange tube to be bent in an arc shape at the bending 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.

[0072] In some embodiments of the present application, the heat exchange tube is an aluminum tube.

[0073] In the above embodiment, by setting the heat exchange tube to an aluminum tube, the aluminum tube is light in weight, low in price, has good structural strength, and has good thermal conductivity, so that the production and processing cost of the heat exchange component is low and the lightweight requirement of the battery can be better met, so that the heat exchange tube has good heat exchange efficiency when exchanging heat with the battery cell, thereby making the heat exchange effect of the battery cell better.

[0074] In some embodiments of the present application, the wall thickness of the heat exchange tube is 0.2 mm-3 mm.

[0075] In the above embodiment, by setting the wall thickness of the heat exchange tube to 0.2mm-3mm, the heat exchange tube has an appropriate wall thickness, so that the wall thickness of the heat exchange tube is not too small, thereby ensuring the use strength of the heat exchange tube and effectively reducing the risk of damage to the heat exchange tube; the wall thickness of the heat exchange tube is not too large, which is beneficial to reducing the overall weight of the heat exchange tube, thereby reducing the overall weight of the battery and achieving lightweight batteries.

[0076] In one embodiment of the present application, the wall thickness of the heat exchange tube is 0.5 mm-1.2 mm.

[0077] By setting the wall thickness of the heat exchange tube to 0.5mm-1.2mm, the strength of the heat exchange tube can be ensured while the overall weight of the heat exchange tube can be reduced, thereby achieving lightweight batteries.

[0078] In some embodiments of the present application, the width of the heat exchange channel is 3mm-200mm.

[0079] In the above embodiment, by setting the width of the heat exchange flow channel to 3mm-200mm, the width of the heat exchange flow channel can be made not too large, which is beneficial to the layout of the heat exchange flow channel and can meet the heat exchange effect required by the heat exchange element; the width of the heat exchange flow channel can also be made not too small, so that the number of arrangements of the first heat exchange section can be reduced, thereby reducing the overall cost of the heat exchange element;

[0080] In one embodiment of the present application, the width of the heat exchange channel is 5 mm-80 mm.

[0081] By further limiting the width of the heat exchange channel to between 5 mm and 80 mm, the width of the heat exchange channel can better meet the layout requirements of the heat exchange channel in the battery and the heat exchange effect required by the heat exchange component.

[0082] In some embodiments of the present application, the height of the heat exchange channel in the second direction is 1 mm-20 mm.

[0083] By setting the height of the heat exchange channel in the second direction to 1mm-20mm, the height of the heat exchange element can be prevented from being too small, thereby ensuring the flow rate of the heat exchange fluid in the heat exchange element, thereby ensuring the heat exchange effect of the heat exchange element.

[0084] In one embodiment of the present application, the height of the heat exchange channel in the second direction is 4 mm-6 mm.

[0085] By setting the height of the heat exchange channel in the second direction to 4 mm-6 mm, the heat exchange effect of the heat exchange element can be further guaranteed, the space occupied by the heat exchange element can be reduced, and the miniaturization of the battery can be achieved.

[0086] In some embodiments of the present application, the heat exchange fluid in the heat exchange channel is a mixture of water and ethylene glycol.

[0087] In the above embodiment, the heat exchange fluid in the heat exchange channel is set to a mixed solution of water and ethylene glycol. The ethylene glycol aqueous solution has good stability and good heat transfer properties, and can perform heat exchange operations well.

[0088] In one embodiment of the present application, the heat exchange fluid is a mixture of 50% water and 50% ethylene glycol.

[0089] In one embodiment of the present application, the thermal conductivity of the heat exchange fluid in the heat exchange channel is greater than or equal to 0.3 W / (m·K).

[0090] The thermal conductivity is set to be greater than or equal to 0.3 W / (m·K) so that the heat exchange fluid can have good heat exchange efficiency and heat exchange effect, thereby enabling the battery to obtain good heat exchange.

[0091] In one embodiment of the present application, the thermal conductivity of the heat exchange fluid in the heat exchange channel is 0.328 W / (m·K)-0.417 W / (m·K).

[0092] By further limiting the thermal conductivity to between 0.328W / (m·K) and 0.417W / (m·K), the heat exchange fluid can have better heat exchange efficiency and effect, thereby enabling the battery to obtain better heat exchange.

[0093] In some embodiments of the present application, the shell of the battery cell is an aluminum shell.

[0094] In the above embodiment, the shell of the battery cell is set to an aluminum shell. The shell is light in weight, which can improve the energy density of the battery cell to a certain extent. The aluminum shell is easy to process and shape, so that the battery cell processing and manufacturing efficiency is higher. The aluminum shell 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.

[0095] In some embodiments of the present application, the shell of the battery cell is a three-series aluminum alloy part or a five-series aluminum alloy part.

[0096] In the above embodiment, the shell of the battery cell is set to a third-series aluminum alloy part or a fifth-series aluminum alloy part, so that the shell has excellent processing and forming performance, corrosion resistance, thermal conductivity and good structural strength, can transfer heat well, and make the battery cell have a higher heat exchange efficiency during heat exchange, thereby meeting the use and protection needs of the battery cell well.

[0097] In some embodiments of the present application, the length of the battery cell is 154 mm-234 mm; and / or the width of the battery cell is 63 mm-103 mm; and / or the wall thickness of the shell of the battery cell is 0.4 mm-1 mm.

[0098] In the above embodiment, the length of the battery cell is set between 154mm-234mm, and the width of the battery cell is set between 63mm-103mm, so that the battery cell can be set with corresponding width dimensions according to different usage needs to meet the usage needs of the battery; the wall thickness of the battery cell shell is set between 0.4mm-1mm, so that the shell has sufficient strength to protect the battery cell well, so that the battery cell can operate stably and reliably, and the wall thickness of the shell is smaller to facilitate heat transfer between the inside and outside of the battery cell, so that the battery cell can obtain a better heat exchange effect.

[0099] In some embodiments of the present application, the battery further includes a box body, the box body includes a box body, the box body is an integral stamped part and includes a bottom wall and a surrounding wall, and the battery assembly is disposed in the box body.

[0100] In the above embodiment, by setting the box body as an integral stamped part, the process steps of the box can be reduced and the production cost of the box can be reduced. At the same time, the overall weight of the box can be reduced while ensuring the rigidity of the box, thereby reducing the overall weight of the battery and reducing the load on the vehicle.

[0101] In one embodiment of the present application, the thermal management system of the battery includes a temperature regulating component, which includes at least one of a first temperature regulating component and a second temperature regulating component. The first temperature regulating component is arranged outside the box body and is in contact with the outer wall of the box body; the second temperature regulating component is arranged in the box body and is located between any side of the outer peripheral surface of the battery cell and the box body; at least one of the first temperature regulating component and the second temperature regulating component forms a heat exchange component.

[0102] In the above embodiment, by arranging the first temperature regulating component on the outside of the box body, the space occupied by the first temperature regulating component in the box body can be reduced, making it more convenient to arrange the battery assembly in the box body, and reducing the adverse effects of the first temperature regulating component on the operating environment of the battery assembly in the box body, making the battery assembly operate more stably and reliably, thereby enabling the battery to operate more stably and reliably to a certain extent.

[0103] By arranging the second temperature regulating component between the casing and the battery assembly, the heat transfer between the second temperature regulating component and the battery assembly can be more direct and efficient, so that the second temperature regulating component can better exchange heat with the battery assembly, thereby enabling the second temperature regulating component to better perform temperature regulation operations, thereby enabling the battery to operate more stably.

[0104] Forming at least one of the first temperature regulating component and the second temperature regulating component into a heat exchange component can enable the battery's thermal management system to better manage the battery's heat, so that during the battery operation, the battery components can operate in a good temperature environment, thereby making the battery operation more stable and the battery performance better.

[0105] In some examples of the present application, the thermal management system of the battery also includes a third temperature regulating component, which is disposed in the box and between two adjacent battery cells. The structure of the third temperature regulating component is the same as or different from that of the heat exchange component.

[0106] In the above embodiment, by arranging the third temperature regulating member between adjacent battery cells, the battery cells in the battery assembly can obtain a better heat exchange effect, so that the thermal management system of the battery can better regulate the temperature inside the battery and make the battery operate more stably.

[0107] On the second aspect, an embodiment of the present application provides an electrical device. By setting the battery of the first aspect above, 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, which can increase the heat exchange rate between the heat exchange tube and the battery cell, 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 in the battery assembly more uniform, making the battery operation more stable and reliable, and allowing the battery to maintain good battery performance.

[0108] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0109] Figure 1 is a schematic diagram of a vehicle according to an embodiment of the present application;

[0110] Figure 2 is an exploded diagram of a battery according to an embodiment of the present application;

[0111] Figure 3 is an exploded diagram of a battery according to another embodiment of the present application;

[0112] Figure 4 is a schematic diagram of a battery assembly and a heat exchange element according to a first embodiment of the present application;

[0113] Figure 5 is a schematic diagram of a battery assembly and a heat exchange element according to a second embodiment of the present application;

[0114] Figure 6 is a schematic diagram of temperature distribution obtained by heat exchange simulation of a battery assembly according to an embodiment of the present application with a heat exchange area of ​​15%;

[0115] Figure 7 is a schematic diagram of temperature distribution obtained by heat exchange simulation of a battery assembly according to an embodiment of the present application with a heat exchange area of ​​30%;

[0116] Figure 8 is a schematic diagram of a battery assembly and a heat exchange element according to a third embodiment of the present application;

[0117] Fig. 9 is a schematic diagram of a battery assembly and a heat exchange element according to a fourth embodiment of the present application;

[0118] Fig.10 is a schematic diagram of a battery assembly and a heat exchange element according to a fifth embodiment of the present application;

[0119] Fig.11 is a schematic diagram of a battery assembly and a heat exchange element according to a sixth embodiment of the present application;

[0120] Fig.12 is a schematic diagram of a heat exchanger and a battery box according to some embodiments of the present application;

[0121] Fig.13 is a schematic diagram of a heat exchange element and a box according to other embodiments of the present application;

[0122] Fig.14 is a schematic diagram of a heat exchange element according to an embodiment of the present application at an angle;

[0123] Fig.15 is a cross-sectional view of a battery cell according to an embodiment of the present application;

[0124] Fig.16 is a schematic diagram of a current collector according to an embodiment of the present application;

[0125] Fig.17 is a schematic diagram of a current collector from another angle according to an embodiment of the present application;

[0126] Fig.18 is a schematic diagram of a heat exchange element according to another embodiment of the present application;

[0127] Fig.19 yes Fig.18 An enlarged view of the circled A;

[0128] Fig. 20 yes Fig.18 A schematic diagram of the heat exchange element from another angle shown in ;

[0129] Fig.21 yes Fig. 20 An enlarged view of the circled B;

[0130] Fig. 22is a schematic diagram of a battery assembly and a heat exchange element according to a seventh embodiment of the present application;

[0131] Fig.23 is a schematic diagram of a battery assembly and a heat exchange element according to an eighth embodiment of the present application;

[0132] Fig.24 is a schematic diagram of a battery assembly and a heat exchange element according to a ninth embodiment of the present application;

[0133] Fig.25 is a schematic diagram of a battery assembly and a heat exchange element according to a tenth embodiment of the present application;

[0134] Fig.26 is a schematic diagram of a battery assembly and a heat exchange element according to an eleventh embodiment of the present application;

[0135] Fig. 27 is an exploded diagram of a battery according to another embodiment of the present application;

[0136] Fig.28 is a partial schematic diagram of a battery according to another embodiment of the present application;

[0137] Fig.29 is a partial cross-sectional view of a battery according to another embodiment of the present application;

[0138] Fig.30 yes Fig. 27 A partial schematic diagram of a battery shown in;

[0139] Fig.31 yes Fig.30 An enlarged view of the circled C.

[0140] Reference numerals:

[0141] 1. Vehicles;

[0142] 1000. Battery;

[0143] 100. Heat exchange parts;

[0144] 10. first heat exchange channel; 11. first heat exchange section; 111. first heat exchange part; 112. first bending part; 12. second heat exchange section; 120. U-shaped area; 121. second heat exchange part; 122. third heat exchange part; 123. second bending part; 124. third bending part; 125. fourth heat exchange part; 126. sixth bending part; 127. fifth heat exchange part; 13. third heat exchange section; 14. fourth bending part; 15. first inlet and outlet section; 16. fifth bending part; 17. second inlet and outlet section; 18. seventh bending part; 19. mounting member;

[0145] 20. Current collector; 21. Tube body; 211. First space; 212. Second space; 22. First flow channel interface; 23. Second flow channel interface; 24. Partition structure; 241. First partition plate; 242. Second partition plate;

[0146] 30. second heat exchange channel; 31. fourth heat exchange section; 40. third heat exchange channel;

[0147] 200, battery assembly; 201, battery unit; 2011, battery monomer; 202, first group of battery monomers; 203, second group of battery monomers; 204, third group of battery monomers; 205, fourth group of battery monomers; 206, fifth group of battery monomers;

[0148] 300, box body; 301, box body; 302, bottom guard plate; 303, cover plate;

[0149] 400. Foam parts; 401. Body; 402. Convex ribs;

[0150] 500, temperature adjustment element; 501, first temperature adjustment element; 502, second temperature adjustment element; 503, third temperature adjustment element;

[0151] 2000, controller; 3000, motor. DETAILED DESCRIPTION

[0152] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0153] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0154] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0155] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0156] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0157] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two).

[0158] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the embodiments of the present application.

[0159] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0160] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding. Among them, lithium-ion batteries account for an increasing proportion of the power batteries currently used.

[0161] It is understandable that the temperature environment inside the battery is affected by the external environment. The battery cells in the battery need to be within a certain temperature range during operation. When the temperature inside the battery exceeds or falls below this range, the stability and performance of the battery will be greatly affected. For example, when the weather is hot, the battery cells need to be cooled and dissipated so that the temperature inside the battery is within the required temperature range. When the weather is cold, the battery cells need to be heated and heated so that the temperature inside the battery can still be within the required temperature range.

[0162] In the related art, the battery is usually equipped with a cold pipe structure to dissipate heat and cool down the battery cells, but the heat exchange rate is poor. Specifically, the cooling rate is slow when the cold pipe structure and the battery cells are used for heat dissipation and cooling, and the heating rate is slow when the cold pipe structure and the battery cells are used for heating and heating. As a result, the heat dissipation effect or heating effect of the battery cells needs to be further improved, and the battery has unstable operation and reduced battery performance. The battery performance here refers to the performance indicators such as battery capacity, charge and discharge rate, and voltage.

[0163] When the cold pipe structure cools down the battery cells, the cold pipe structure cannot dissipate the heat from the battery cells in time, resulting in the temperature of the battery cells cannot be effectively and timely reduced. When the cold pipe structure heats up the battery cells, the temperature of the battery cells is not easy to rise to the temperature range during normal operation. Therefore, the heating effect of the cold pipe structure on the battery cells needs to be further improved.

[0164] Based on the above considerations, in order to improve the heating rate or cooling rate of the battery cells when the cold pipe structure heats or cools the battery cells in the battery, so that the battery has a good heating effect or heat dissipation effect, thereby making the battery operation more stable and maintaining good performance during battery operation, the present application proposes a battery, wherein a heat exchange element is arranged in the battery, and the heat exchange element has a heat exchange tube, the heat exchange tube contacts and exchanges heat with one side surface of the battery cell, and 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 can have sufficient heat exchange area, so that the heat exchange element can have a good heating rate or cooling rate when exchanging heat with the battery cell, so that the battery cell can maintain a good heating effect or heat dissipation effect, thereby making the battery operation more stable and the battery can maintain good battery performance.

[0165] The battery disclosed in the embodiment of the present application can be used in an electric device that uses the battery as a power source, or various energy storage systems that use the battery as an energy storage element. The electric device can be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0166] In the embodiment of the present application, the battery cell may be a secondary battery, which refers to a battery cell that can be used continuously by activating the active material by charging after the battery cell is discharged. The battery cell may be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel metal hydride battery, a nickel chromium battery, a lead storage battery, etc.

[0167] Reference Figure 1 , Figure 1 A schematic diagram of a vehicle 1 provided for some embodiments of the present application. Vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 1000 is provided inside the vehicle 1, and the battery 1000 may be provided at the bottom, head or tail of the vehicle 1. The battery 1000 may be used to power the vehicle 1, for example, the battery 1000 may be used as an operating power source for the vehicle 1. The vehicle 1 may also include a controller 2000 and a motor 3000, and the controller 2000 is used to control the battery 1000 to power the motor 3000, for example, for the starting, navigation and working power requirements of the vehicle 1 during driving.

[0168] In some embodiments of the present application, the battery 1000 can not only serve as an operating power source for the vehicle 1 , but also serve as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0169] Reference Figure 2-Figure 3 , Figure 2 is an exploded view of a battery 1000 according to an embodiment of the present application, Figure 3 It is an exploded view of a battery 1000 according to another embodiment of the present application. The battery 1000 includes a case body 300, a battery cell 2011 and a heat exchange element 100. The case body has a accommodating cavity. The battery cell 2011 is accommodated in the accommodating cavity of the case body 300. The heat exchange element 100 can be arranged between the battery cell 2011 and the case body 300, and can also be arranged between adjacent battery cells 2011.

[0170] Among them, the box body is used to provide a storage space for the battery cell 2011, and the box body 300 can adopt a variety of structures. In some embodiments, the box body 300 may include a first part (such as the box body 301 hereinafter) and a second part (such as the cover plate 303 hereinafter), the first part and the second part cover each other, and the first part and the second part jointly define a storage space for accommodating the battery cell 2011. The second part may be a hollow structure with an opening at one end, and the first part may be a plate-like structure, and the first part covers the opening side of the second part, so that the first part and the second part jointly define a storage space; the first part and the second part may also be hollow structures with an opening at one side, and the opening side of the first part covers the opening side of the second part. Of course, the box body formed by the first part and the second part may be in a variety of shapes, such as a cylinder, a cuboid, etc. Optionally, in some embodiments, the box body 300 also includes a bottom guard plate 302, which is arranged on the lower side of the bottom plate of the box body 300 to further enhance the bearing strength and impact resistance of the bottom of the box body 300. The base plate may be made of a variety of materials, including but not limited to: copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0171] In the battery 1000, there may be multiple battery cells 2011, and the multiple battery cells 2011 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 2011 are both connected in series and in parallel. The multiple battery cells 2011 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 2011 is accommodated in the box 300; of course, the battery 1000 may also be a battery 1000 module in which multiple battery cells 2011 are first connected in series, in parallel, or in a mixed connection, and then the multiple battery 1000 modules are connected in series, in parallel, or in a mixed connection to form a whole, and then accommodated in the box 300. The battery 1000 may also include other structures, for example, the battery 1000 may also include a converging component for realizing electrical connection between the multiple battery cells 2011.

[0172] Each battery cell 2011 may be a secondary battery 1000 or a primary battery 1000, or a lithium-sulfur battery 1000, a sodium-ion battery 1000, or a magnesium-ion battery 1000, but is not limited thereto. The battery cell 2011 may be cylindrical, flat, rectangular, or in other shapes.

[0173] In the battery 1000, the heat exchange element 100 may be disposed between the multiple battery cells 2011 and the top wall of the box 300, or between the multiple battery cells 2011 and the bottom wall of the box 300, or between the bottom wall of the box 300 and the bottom guard plate 302, or between two adjacent battery cells 2011, to provide heat exchange for the multiple battery cells 2011. In some embodiments, the heat exchange element 100 may include a heat exchange tube and a current collector 20, wherein the heat exchange tube is connected to the current collector 20, the heat exchange tube may be a flat tube, a round tube, a harmonica tube or other shapes of tubes, and the current collector 20 may be a rectangular tube or a round tube, etc.

[0174] Reference below Figure 4-Figure 15 A battery 1000 according to an embodiment of the first aspect of the present application is described. Figure 4 is a schematic diagram of a battery assembly 200 and a heat exchange element 100 according to a first embodiment of the present application; Figure 5 is a schematic diagram of a battery assembly 200 and a heat exchange element 100 according to a second embodiment of the present application; Figure 6 is a schematic diagram of temperature distribution obtained by heat exchange simulation of a battery assembly 200 according to an embodiment of the present application with a heat exchange area of ​​15%; Figure 7 is a schematic diagram of temperature distribution obtained by heat exchange simulation of a battery assembly 200 according to an embodiment of the present application with a heat exchange area of ​​30%; Figure 8 is a schematic diagram of a battery assembly 200 and a heat exchange element 100 according to a third embodiment of the present application; Fig. 9 is a schematic diagram of a battery assembly 200 and a heat exchange element 100 according to a fourth embodiment of the present application; Fig.10 is a schematic diagram of a battery assembly 200 and a heat exchange element 100 according to a fifth embodiment of the present application; Fig.11 is a schematic diagram of a battery assembly 200 and a heat exchange element 100 according to a sixth embodiment of the present application; Fig.12 is a schematic diagram of a heat exchange element 100 and a box 300 of a battery 1000 according to some embodiments of the present application; Fig.13 is a schematic diagram of a heat exchange element 100 and a box body 300 according to other embodiments of the present application; Fig.14 is a schematic diagram of a heat exchange element 100 according to an embodiment of the present application at an angle; Fig.15 is a cross-sectional view of a battery cell 2011 according to an embodiment of the present application.

[0175] The battery 1000 according to the first embodiment of the present application includes: a battery assembly 200 and a heat exchange element 100, the battery assembly 200 includes a battery cell 201, and the battery cell 201 includes a battery cell 201 along a first direction (such as Figure 4 The heat exchange element 100 is disposed on the battery assembly 200 in the second direction (as shown in the X direction) and a plurality of battery cells 2011 are stacked and arranged; Figure 3The heat exchange element 100 includes a heat exchange tube, and the heat exchange tube has a heat exchange channel. The heat exchange channel is bent and extended on the surface of one side of the battery assembly 200 in the second direction, wherein the wall surface where the battery cell 2011 and the heat exchange tube cooperate is taken as the projection surface, and the area of ​​the positive projection of the heat exchange tube on the wall surface is greater than or equal to 15% of the wall area.

[0176] Among them, a battery cell 201 is arranged in the battery assembly 200, and the battery cell 201 can be provided with one or more. When the battery cell 201 is provided with multiple, the number of battery cells 201 can be two, three, four, five, etc. The battery cell 201 includes a plurality of battery cells 2011 stacked along a first direction. The battery cell 2011 can be a cylindrical battery 1000, a square battery 1000 or a soft-pack battery 1000, etc. The battery cell 2011 can be provided with two, three, four, five, six, etc. The number of battery cells 2011 in each battery cell 201 can be the same or different, and the number of battery cells 2011 in the battery cell 201 can be set according to the design requirements of the use of the battery 1000.

[0177] Here, “the first direction intersects the second direction” is intended to explain that the first direction and the second direction can be arranged vertically, or can be arranged to only intersect non-vertically, that is, to intersect 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°.

[0178] The heat exchange element 100 includes a heat exchange tube having 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 as needed.

[0179] The heat exchange channel extends on one side surface of the battery assembly 200 in the second direction, that is, the heat exchange channel extends on one side surface of the plurality of battery cells 2011 in the second direction, and the heat exchange element 100 can cooperate with the one side surface of the battery cell 2011 in the second direction for heat exchange. The heat exchange channel bends and extends on one side surface of the battery assembly 200 in the second direction, and the heat exchange channel can be bent to change the extension direction.

[0180] For example, when extending along a first direction, the heat exchange channel can be bent to change the extension direction to extend in a direction perpendicular to the first direction. The heat exchange channel can also be bent multiple times to form multiple channel sections extending the same distance in the first direction, and the multiple channel sections are arranged at intervals in a direction perpendicular to the first direction. The specific bending form of the heat exchange channel can be reasonably arranged according to the heat exchange needs.

[0181] When the heat exchange component 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 flow channel, and the heat exchange fluid cools or heats the battery cell 2011 from the side surface of the battery cell 2011 that abuts the heat exchange tube. Specifically, when the heat exchange component 100 cools the battery cell 2011, the heat in the battery cell 2011 can be transferred to the shell of the battery cell 2011, and the heat is transferred along the shell to the side surface of the battery cell 2011 that cooperates with the heat exchange tube. The heat is then transferred to the heat exchange fluid in the heat exchange flow channel through the heat exchange tube. The heat exchange fluid flows to drive and dissipate the heat. As a result, the heat exchange fluid flows along the heat exchange flow channel to continuously take away the heat to cool and dissipate the battery cell 2011.

[0182] When the heat exchange element 100 heats the battery cell 2011, the heat exchange fluid with heat flows along the heat exchange channel, and 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, continuously transferring heat to the battery cell 2011 to heat the battery cell 2011.

[0183] Among them, the wall surface where the battery cell 2011 cooperates with the heat exchange tube is set as a projection surface. The wall surface where the battery cell 2011 cooperates with the heat exchange tube refers to the side surface of the battery cell 2011 in the battery assembly 200 in the second direction. Specifically, the wall surface is the outer surface of the shell of the battery cell 2011 on one side in the second direction. When the heat exchange component 100 heats or cools the battery cell 2011, the heat is transferred from the battery cell 2011 to the heat exchange fluid in the heat exchange tube through the wall surface, or, from the heat exchange fluid in the heat exchange tube to the battery cell 2011.

[0184] The area of ​​the orthographic projection of the heat exchange tube on the wall surface, the orthographic projection of the heat exchange tube refers to: the projection of the heat exchange tube along the direction parallel to the second direction on the projection surface, that is, 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 of ​​the battery cell 2011 and the heat exchange tube for heat exchange. The area of ​​the orthographic projection of the heat exchange tube on the wall surface is set to be greater than 15% of the wall area, that is, 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 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% and so on of the wall area of ​​the battery cell 2011.

[0185] It is understandable that when the battery cell 2011 is cooled or heated, when the fluid temperature of the heat exchange fluid remains unchanged, the larger the heat exchange area between the battery cell 2011 and the heat exchange tube, the faster the battery cell 2011 cools down or heats up.

[0186] In the above embodiment, the heat exchange area of ​​the battery cell 2011 is limited to be greater than or equal to 15% of the wall area of ​​the battery cell 2011. When the heat exchange component 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 to improve the heat exchange rate of the battery cell 2011, that is, to improve 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 the appropriate temperature range during the normal operation of the battery assembly 200, reducing the temperature fluctuation of the battery cell 2011 during operation, so that the battery cell 2011 can operate more stably, and then the battery 1000 can operate stably, and the battery 1000 can maintain good battery 1000 performance.

[0187] In addition, this embodiment increases the contact area between the battery cell 2011 and the heat exchange tube 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, that is, increases the arrangement density of the heat exchange tube on the surface of the battery assembly 200. The increase in the arrangement density of the heat exchange tube can improve the uniformity of heat transfer between the heat exchange element 100 and the battery assembly 200 at various positions, thereby improving the temperature uniformity of the battery assembly 200 and improving the temperature uniformity of the battery 1000.

[0188] The following is a simulation experiment analysis of two specific examples of the battery 1000 of the present application, wherein the simulation software used is FloEFD.

[0189] When performing simulation analysis, it is assumed that the battery assembly 200 of the battery 1000 includes four battery cells 201, each battery cell 201 includes 30 battery cells 2011 stacked in the thickness direction, and the four battery cells 201 are stacked in the length direction of the battery cell 2011. The length of each battery cell 2011 is 194 mm, the width is 83 mm, and the thickness is 30 mm. The wall thickness of the shell of the battery cell 2011 is 0.55 mm. Among them, the battery cell 2011 can be a lithium iron phosphate battery 1000 or a ternary lithium battery 1000. The shell of the battery cell 2011 is set to be a three-series aluminum, and the three-series aluminum includes the following mass percentage components: 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 single elements ≤ 0.03%.

[0190] The ambient temperature of the simulation experiment is set to -20°C, the initial temperature of the battery cell 2011 is set to -20°C, and the target temperature of the battery cell 2011 is set to 0°C.

[0191] The heat exchanger 100 is assumed to be arranged at the bottom of the battery assembly 200. The heat exchanger 100 includes two symmetrically arranged heat exchange tubes. The heat exchange tubes include a first heat exchange section 11 and a second heat exchange section 12 connected in sequence. The second heat exchange section 12 is bent around the battery assembly 200 to form a U-shaped area 120. The first heat exchange section 11 extends in a circuitous manner along the thickness direction of the battery cell 2011 inside the U-shaped area 120. The openings of the U-shaped areas of the two heat exchange tubes are arranged facing each other in the length direction of the battery cell 2011. The water inlet and the water outlet of the two heat exchange tubes are arranged side by side in the middle area of ​​one side of the battery assembly 200 in the thickness direction of the battery cell 2011.

[0192] The heat exchange tube is set to be an aluminum tube, and the contact between the heat exchange tube and the battery assembly 200 and the contact between adjacent battery cells 2011 are both ideal contacts.

[0193] The heat exchange fluid in the heat exchange tube is set to be a mixture of 50% water and 50% ethylene glycol, with a density of about 1.11 g / cm 3 -1.13g / cm 3 The specific heat capacity is about 4.18 J / (g·℃), the thermal conductivity is about 0.229 W / (m·K), and the viscosity is about 0.00014 Pa·s.

[0194] During the simulation, the heat exchange element 100 is used to heat the battery assembly 200, wherein 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.

[0195] 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. When the battery assembly 200 reaches the target temperature, the heating of the heat exchange element 100 is stopped. At this time, it can be concluded that the temperature rise rate of the battery assembly 200 is: 0.5℃ / min. At the same time, the temperature distribution cloud map of the battery assembly 200 can be obtained, referring to Figure 6 shown.

[0196] from Figure 6 It can be seen that when the ratio of the heat exchange area of ​​the battery cell 2011 to the area of ​​the wall of the battery cell 2011 is 15%, in the overall temperature distribution cloud diagram, the lowest temperature in the battery 1000 is 0.02°C, the highest temperature in the battery 1000 is 5.63°C, and the maximum temperature difference in the battery 1000 is 5.61°C.

[0197] 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. When the battery assembly 200 reaches the target temperature, the heating of the heat exchange element 100 is stopped. At this time, it can be concluded that the temperature rise rate of the battery assembly 200 is: 0.914℃ / min. At the same time, the temperature distribution cloud map of the battery assembly 200 can be obtained. Figure 7 As shown, Figure 7 This is a temperature distribution diagram obtained by performing a simulation experiment on the battery 1000 of this embodiment.

[0198] from Figure 7 It can be seen that when the ratio of the heat exchange area of ​​the battery cell 2011 to the area of ​​the wall of the battery cell 2011 is 30%, in the overall temperature distribution cloud diagram, the lowest temperature in the battery 1000 is 0.01°C, the highest temperature in the battery 1000 is 4.10°C, and the maximum temperature difference in the battery 1000 is 4.09°C.

[0199] It can be seen from the above that when the ratio of the heat exchange area of ​​the battery cell 2011 to the area of ​​the wall of the battery cell 2011 increases from 15% to 30%, the temperature rise rate of the battery assembly 200 increases from 0.5℃ / min to 0.914℃ / min, and the maximum temperature difference in the battery assembly 200 decreases from 5.61℃ to 4.09℃.

[0200] 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 wall of the battery cell 2011 is greater than or equal to 15%, the temperature rise rate of the battery assembly 200 is greater than or equal to 0.5°C / min, and the maximum temperature difference in the battery assembly 200 is less than or equal to 8°C. Further, the maximum temperature difference in the battery assembly 200 is less than or equal to 6°C, and 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 in the battery assembly 200 decreases.

[0201] Next, the multiple battery cells 2011 of the battery assembly 200 are divided into regions, and the temperature distribution cloud map of each region is further analyzed in detail.

[0202] It should be noted that, in order to facilitate the connection of the current collector, the water inlets and outlets of the two heat exchange tubes are arranged side by side. Affected by the inlet water temperature, the temperature of the battery cells 2011 adjacent to the water inlets and outlets of the heat exchange tubes of the battery assembly 200 is usually significantly higher than the temperature of the remaining battery cells 2011. Therefore, the area where the three rows of battery cells 2011 adjacent to the water inlets of the heat exchange tubes of the battery assembly 200 are located is divided into the first area s1. At the same time, from Figure 6 It can be seen that the battery cells 2011 arranged on the other side of the battery assembly 200 opposite to the first area s1 also have a local high temperature, and the area where the three columns of battery cells 2011 on the other side edge of the battery assembly 200 are located is divided into the second area s2. The remaining area of ​​the battery assembly 200 except the first area s1 and the second area s2 is the third area s3.

[0203] For the third area s3, Figure 6 It can be seen that in the third area s3 in Example ①, the lowest temperature is 0.76°C, the highest temperature is 1.35°C, and the maximum temperature difference is 0.59°C. Figure 7 It can be seen that in the third area s3 in Example ②, the lowest temperature is 0.46°C, the highest temperature is 1.01°C, and the maximum temperature difference is 0.55°C.

[0204] As can be seen from the above, in the third area s3 of the above examples ① and ②, the maximum temperature difference of the battery assembly 200 is less than 1°C. It can be concluded that when the heat exchange area of ​​the battery cell 2011 and the area of ​​the wall of the battery cell 2011 are greater than or equal to 15%, in the third area s3, the temperature difference in the battery assembly 200 can be less than or equal to 2°C, and further, can be less than or equal to 1°C, so that the temperature distribution is very uniform.

[0205] At the same time, in the third area s3 of example ①, the maximum difference from the target temperature of 0°C is 1.35°C, and in the third area s3 of example ②, the maximum difference from the target temperature of 0°C is 1.01°C. That is, when the ratio of the heat exchange area of ​​the battery cell 2011 to the area of ​​the wall of the battery cell 2011 increases from 15% to 30%, in the third area s3, the maximum difference from the target temperature decreases from 1.35°C to 1.01°C. It can be concluded that as the heat exchange area increases, in the third area s3, the difference between the battery cell 2011 and the target temperature is smaller, and the temperature distribution of the battery assembly 200 is more uniform.

[0206] For the second area s2, Figure 6 It can be seen that the highest temperature of 5.63°C in example ① appears in the second region s2, while Figure 7 In example ②, the two temperature measurement points in the second area s2 are 0.28°C and 0.01°C respectively, both of which are very close to the target temperature value, that is, in example ②, the temperature of the battery cell 2011 in the second area s2 and the temperature of the battery cell 2011 in the third area s3 are basically in the range of 0°C-1°C.

[0207] It should be noted that the ratio of the heat exchange area of ​​the battery cell 2011 of Example ① to the area of ​​the wall of the battery cell 2011 is 15%, that is, the ratio of the heat exchange area of ​​the battery cell 2011 of Example ① to the area of ​​the wall of the battery cell 2011 is 15%, which is the lower limit endpoint value of the ratio of the heat exchange area of ​​the battery cell 2011 to the area of ​​the wall of the battery cell 2011 of this application is greater than or equal to 15%. The ratio of the heat exchange area of ​​the battery cell 2011 of Example ② to the area of ​​the wall of the battery cell 2011 is 30%.

[0208] Among them, since both Example ① and Example ② include two heat exchange tubes. Then, for one heat exchange tube, the length of the heat exchange tube in Example ① is smaller than the length of the heat exchange tube in Example ②, which makes the flow resistance of the heat exchange tube in Example ① smaller than that in Example ②. Moreover, when the heat exchange fluid moves from the third area s3 to the second area s2, the heat exchange flow channel of the heat exchange tube is bent, which causes the heat exchange fluid to gather at the position of the second area s2. Therefore, compared with the second area s2 of Example ②, the second area s2 of Example ① has a faster flow rate of the fluid per unit time, a larger total heat exchange amount, a higher and faster local temperature rise, and a greater temperature difference with the battery cell 2011 in the third area s3.

[0209] From the above analysis, it can be seen that when the ratio between the heat exchange area of ​​the battery cell 2011 in Example ① and the area of ​​the wall of the battery cell 2011 is the lower endpoint value of 15%, the temperature difference between the third area s3 and the target temperature can be less than 2°C, and the overall temperature difference of the battery assembly 200 can be maintained at less than 6°C. However, due to the lower limit value of the arrangement density of the heat exchange tube and the bend of the heat exchange flow channel, in addition to the first area s1 arranged adjacent to the water inlet of the heat exchange tube having a higher temperature point, there is also a large temperature difference between the second area s2 and the target temperature, and the temperature uniformity needs to be further improved. This can also indirectly prove that when the ratio of the heat exchange area of ​​the battery cell 2011 to the area of ​​the wall of the battery cell 2011 is less than 15%, the uniformity of the temperature distribution of the battery assembly 200 needs to be improved and enhanced.

[0210] When the ratio between the heat exchange area of ​​the battery cell 2011 in Example ② and the area of ​​the wall of the battery cell 2011 is 30%, the temperature difference between the second area s2 and the third area s3 and the target temperature is basically within 1°C. Only the temperature of the first area s1 adjacent to the water inlet is slightly higher. However, the overall temperature difference of the battery assembly 200 can also be less than 5°C.

[0211] 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 wall of the battery cell 2011 increases from 15% to 30%, the difference between the temperature of the second area s2 and the target temperature can be reduced from 5.63°C to 0.01°C, that is, as the heat exchange area of ​​the battery cell 2011 increases, the temperature uniformity between the second area s2 and the third area s3 of the battery assembly 200 is significantly improved.

[0212] It can be seen from the above simulation analysis that the battery 1000 of the embodiment of the present application, by limiting the heat exchange area of ​​the battery cell 2011 to greater than or equal to 15% of the wall area of ​​the battery cell 2011, can not only increase the temperature rise rate of the battery assembly 200 and enable the battery 1000 to quickly reach the preset temperature, but also, when other conditions remain unchanged, the temperature rise rate increases with the increase of the heat exchange area.

[0213] At the same time, the battery 1000 of the embodiment of the present application can make the difference between the highest temperature and the lowest temperature of the battery assembly 200 in the third area s3 less than 2°C, and further, the difference between the highest temperature and the lowest temperature in the third area s3 and the second area s2 can be made less than 1°C, that is, the internal temperature difference of the battery assembly 200 can be controlled within a smaller range, thereby improving the temperature uniformity in the battery assembly 200, and when other conditions remain unchanged, the temperature uniformity of the battery assembly 200 is better as the heat exchange area increases.

[0214] In the above embodiment, 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. 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 the normal operation of the battery assembly 200, reducing the temperature fluctuation of the battery cell 2011 during operation, thereby making the battery cell 2011 operate more stably, and furthermore making the battery 1000 operate stably.

[0215] In some embodiments of the present 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 orthographic projection of the heat exchange tube on the wall surface may be greater than or equal to 30% of the wall surface area.

[0216] The thickness of the battery cell 2011 in the first direction is set to be greater than or equal to 40 mm. 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 shell of the battery cell 2011 is the large surface of the battery cell 2011 on both sides of 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 orthographic projection of the heat exchange tube on 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% and so on of the wall area. The ratio of the heat exchange area of ​​the battery cell 2011 to the wall area can be set accordingly according to the thickness of the battery cell 2011.

[0217] It can be understood that when the thickness of the battery cell 2011 increases, the overall volume of the battery cell 2011 becomes larger, and when the battery cell 2011 reaches the same heating rate and cooling rate, the required heat exchange amount increases.

[0218] Although when the thickness of the battery cell 2011 increases, the wall area of ​​the battery cell 2011 that cooperates with the heat exchange tube also increases accordingly when the structure of the heat exchange tube remains unchanged, the increased heat exchange contact area cannot meet the heat exchange needs required after the volume of the battery cell 2011 increases.

[0219] Therefore, in order to meet the heat exchange demand of the battery cell 2011 after the thickness increases to greater than or equal to 40 mm, this embodiment sets the area of ​​the positive projection of the heat exchange tube on the wall to greater than or equal to 30% of the wall area. In this way, the heat exchange area between the battery cell 2011 and the heat exchange tube can be increased, so that the heat exchange contact area between the battery cell 2011 and the heat exchange tube matches the heat exchange demand of the battery cell 2011 after the thickness is increased, thereby improving the heat exchange speed of the heat exchange tube to the battery cell 2011, and improving the heat exchange effect of the heat exchange tube on the battery cell 2011, thereby achieving rapid heating and cooling of the battery cell 2011, and then allowing the battery cell 2011 to quickly enter and maintain a suitable temperature range, making the operation of the battery assembly 200 more stable.

[0220] In the above embodiment, 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 be greater than or equal to 30%. This can make the heat exchange contact area between the heat exchange tube and the battery cell 2011 better match the heat exchange demand of the battery cell 2011 after the thickness is increased, so that the battery assembly 200 can be better maintained in a suitable temperature range, thereby making the temperature uniformity of the battery assembly 200 better and making the battery 1000 operate more stably.

[0221] In some embodiments of the present 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 orthographic projection of the heat exchange tube on the wall surface can be greater than or equal to 15% and less than 30% of the wall area.

[0222] 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 orthographic projection of the heat exchange channel on the wall to the area of ​​the wall is limited to be greater than or equal to 15% and less than 30%, for example, the ratio of the area of ​​the orthographic projection of the heat exchange tube on the wall to the area of ​​the wall 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 orthographic projection of the heat exchange tube on the wall to the area of ​​the wall can be arranged accordingly according to the thickness of the battery cell 2011.

[0223] In the above embodiment, 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 greater than or equal to 15% and less than 30%. This can make the heat exchange contact area between the heat exchange tube and the battery cell 2011 well matched with the heat exchange requirement of the battery cell 2011 after the thickness is increased, 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 making the battery 1000 operate more stably.

[0224] In some embodiments of the present 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 orthographic projection of the heat exchange tube on the wall surface may be greater than or equal to 45% of the wall surface area.

[0225] 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 orthographic projection of the heat exchange tube on the wall to the area of ​​the wall is limited to be greater than or equal to 45%, for example, the ratio of the area of ​​the orthographic projection of the heat exchange tube on the wall to the area of ​​the wall can be 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, etc. The ratio of the area of ​​the orthographic projection of the heat exchange tube on the wall to the area of ​​the wall can be arranged accordingly according to the thickness of the battery cell 2011.

[0226] In the above embodiment, 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 be greater than or equal to 45%, so that the heat exchange contact area between the heat exchange tube and the battery cell 2011 can be better matched with the heat exchange demand of the battery cell 2011 after the thickness is increased, so that the battery assembly 200 can be better maintained in a suitable temperature range, thereby making the temperature uniformity of the battery assembly 200 better and making the battery 1000 operate more stably.

[0227] In some embodiments of the present 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 orthographic projection of the heat exchange tube on the wall surface can be greater than or equal to 30% and less than 45% of the wall area.

[0228] 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 orthographic projection of the heat exchange tube on the wall to the area of ​​the wall is limited to be greater than or equal to 30% and less than 45%, for example, the ratio of the area of ​​the orthographic projection of the heat exchange tube on the wall to the area of ​​the wall can be 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, etc. The ratio of the area of ​​the orthographic projection of the heat exchange tube on the wall to the area of ​​the wall can be arranged accordingly according to the thickness of the battery cell 2011.

[0229] In the above embodiment, 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 greater than or equal to 30% and less than 45%. This can make the heat exchange contact area between the heat exchange tube and the battery cell 2011 well matched with the heat exchange requirement of the battery cell 2011 after the thickness is increased, 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 making the battery 1000 operate more stably.

[0230] In some embodiments of the present 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 orthographic projection of the heat exchange tube on the wall surface may be greater than or equal to 65% of the wall surface area.

[0231] The thickness of the battery cell 2011 in the first direction is greater than or equal to 60 mm, for example, the thickness of the battery cell 2011 can be 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 orthographic projection of the heat exchange tube on the wall to the area of ​​the wall is limited to be greater than or equal to 65%, for example, the ratio of the area of ​​the orthographic projection of the heat exchange tube on the wall to the area of ​​the wall can be 65%, 70%, 75%, 80%, 85%, 90%, 95%, etc. The ratio of the area of ​​the orthographic projection of the heat exchange tube on the wall to the area of ​​the wall can be arranged accordingly according to the thickness of the battery cell 2011.

[0232] In the above embodiment, 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 be greater than or equal to 65%, so that the heat exchange contact area between the heat exchange tube and the battery cell 2011 can be better matched with the heat exchange demand of the battery cell 2011 after the thickness is increased, so that the battery assembly 200 can be better maintained in a suitable temperature range, thereby making the temperature uniformity of the battery assembly 200 better and making the battery 1000 operate more stably.

[0233] In some embodiments of the present 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 orthographic projection of the heat exchange tube on the wall surface can be greater than or equal to 45% and less than 65% of the wall area.

[0234] 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 orthographic projection of the heat exchange tube on the wall to the area of ​​the wall is limited to be greater than or equal to 45% and less than 65%, for example, the ratio of the area of ​​the orthographic projection of the heat exchange tube on the wall to the area of ​​the wall 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 orthographic projection of the heat exchange tube on the wall to the area of ​​the wall can be arranged accordingly according to the thickness of the battery cell 2011.

[0235] In the above embodiment, 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 greater than or equal to 45% and less than 65%. This can make the heat exchange contact area between the heat exchange tube and the battery cell 2011 well matched with the heat exchange requirement of the battery cell 2011 after the thickness is increased, 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 making the battery 1000 operate more stably.

[0236] In some embodiments of the present 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 orthographic projection of the heat exchange tube on the wall surface may be greater than or equal to 75% of the wall surface area.

[0237] 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 may be 80 mm, 85 mm, 90 mm, 95 mm, 100 mm, 105 mm, etc. The ratio of the area of ​​the orthographic projection of the heat exchange tube on the wall to the area of ​​the wall is limited to be greater than or equal to 75%, for example, the ratio of the area of ​​the orthographic projection of the heat exchange tube on the wall to the area of ​​the wall may be 75%, 80%, 85%, 90%, 95%, etc. The ratio of the area of ​​the orthographic projection of the heat exchange tube on the wall to the area of ​​the wall may be arranged accordingly according to the thickness of the battery cell 2011.

[0238] In the above embodiment, 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 be greater than or equal to 75%, so that the heat exchange contact area between the heat exchange tube and the battery cell 2011 can be better matched with the heat exchange demand of the battery cell 2011 after the thickness is increased, so that the battery assembly 200 can be better maintained in a suitable temperature range, thereby making the temperature uniformity of the battery assembly 200 better and making the battery 1000 operate more stably.

[0239] In some embodiments of the present 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 orthographic projection of the heat exchange tube on the wall surface can be greater than or equal to 65% and less than 75% of the wall area.

[0240] 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 orthographic projection of the heat exchange tube on the wall to the area of ​​the wall is limited to be greater than or equal to 65% and less than 75%, for example, the ratio of the area of ​​the orthographic projection of the heat exchange tube on the wall to the area of ​​the wall can be 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, etc. The ratio of the area of ​​the orthographic projection of the heat exchange tube on the wall to the area of ​​the wall can be arranged accordingly according to the thickness of the battery cell 2011.

[0241] In the above embodiment, 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 can make the heat exchange contact area between the heat exchange tube and the battery cell 2011 well matched with the heat exchange requirement of the battery cell 2011 after the thickness is increased, 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 making the battery 1000 operate more stably.

[0242] In some embodiments of the present application, the thickness of the battery cell 2011 in the first direction is greater than 100 mm, and the area of ​​the orthographic projection of the heat exchange tube on the wall surface may be greater than or equal to 90% of the wall surface area.

[0243] The thickness of the battery cell 2011 in the first direction is greater than 100 mm, for example, the thickness of the battery cell 2011 may be 105 mm, 110 mm, 115 mm, 120 mm, 125 mm, 130 mm, etc. The ratio of the area of ​​the orthographic projection of the heat exchange tube on the wall to the area of ​​the wall is limited to be greater than or equal to 90%, for example, the ratio of the area of ​​the orthographic projection of the heat exchange tube on the wall to the area of ​​the wall may be 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, etc. The ratio of the area of ​​the orthographic projection of the heat exchange tube on the wall to the area of ​​the wall may be arranged accordingly according to the thickness of the battery cell 2011.

[0244] In the above embodiment, when the thickness of the battery cell 2011 is greater than 100 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 90%, so that the heat exchange contact area between the heat exchange tube and the battery cell 2011 can be better matched with the heat exchange demand of the battery cell 2011 after the thickness is increased, so that the battery assembly 200 can be better maintained in a suitable temperature range, thereby making the temperature uniformity of the battery assembly 200 better and making the battery 1000 operate more stably.

[0245] In some embodiments of the present 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 orthographic projection of the heat exchange tube on the wall surface can be greater than or equal to 75% and less than 90% of the wall area.

[0246] 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 orthographic projection of the heat exchange tube on the wall to the area of ​​the wall is limited to be greater than or equal to 75% and less than 90%, for example, the ratio of the area of ​​the orthographic projection of the heat exchange tube on the wall to the area of ​​the wall can be 75%, 79%, 83%, 87%, etc. The ratio of the area of ​​the orthographic projection of the heat exchange tube on the wall to the area of ​​the wall can be arranged accordingly according to the thickness of the battery cell 2011.

[0247] In the above embodiment, when the thickness of the battery cell 2011 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 2011 to the wall area is set to greater than or equal to 75% and less than 90%. This can make the heat exchange contact area between the heat exchange tube and the battery cell 2011 well matched with the heat exchange requirement of the battery cell 2011 after the thickness is increased, 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 making the battery 1000 operate more stably.

[0248] It should be noted that in the above embodiment, the heat exchange contact area between the heat exchange tube and a single battery cell 2011 is designed and determined according to the thickness of the battery cell 2011. In the specific design process, the heating power required for the battery cell 2011 within a unit length can be preset first, and the number of battery cells 2011 can be deduced according to the heating power, and then the thickness of the battery cell 2011 can be deduced.

[0249] For example, the required heating power for all battery cells 2011 covered by the heat exchange channel within a unit length (for example, 1m) is set. It is assumed that the side panel on the side where the large surface of the shell of each battery cell 2011 is located is a fin. The required heating power for the battery cell 2011 within the unit length is approximately the heating power of the fin to the battery cell 2011 within the unit length. Therefore, the required number of fins can be calculated based on the required heating power for the battery cell 2011 within the unit length, and each battery cell 2011 is equivalent to having only two fins. Therefore, the number of battery cells 2011 within the unit length can be obtained, and then the thickness of the battery cell 2011 can be obtained.

[0250] In some embodiments of the present application, Figure 4 and Figure 5As shown, the heat exchange channel may include a first heat exchange channel 10, the first heat exchange channel 10 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 area 120, the first heat exchange section 11 is bent and arranged in the U-shaped area 120, and is bent and connected to the second heat exchange section 12, the battery assembly 200 is located at the outermost battery cell 2011 in the circumferential direction to form a peripheral battery cell, and at least a portion of the second heat exchange section 12 is in contact with the peripheral battery cell.

[0251] The heat exchange flow channel includes a first heat exchange flow channel 10. The first heat exchange flow channel 10 may be provided with one or more. When there are multiple first heat exchange flow channels 10, the multiple first heat exchange flow channels 10 may be arranged in sequence along the first direction. The multiple first heat exchange flow channels 10 may also be arranged in sequence along the third direction (such as Figure 4 The third direction may intersect with the first direction and the second direction, for example, the third direction may intersect with the first direction and the second direction at right angles or at an acute angle or an obtuse angle, for example, the first direction and the second direction may be arranged at an angle of 30°, 60°, 80°, 120°, 150° or 170°.

[0252] Among them, the above-mentioned “the second heat exchange section 12 is bent to form a U-shaped area 120, and the first heat exchange section 11 is bent and arranged in the U-shaped area 120” is intended to explain that the second heat exchange section 12 is arranged at the circumferential periphery of the first heat exchange section 11, and can be arranged on three circumferential sides of the first heat exchange section 11. The second heat exchange section 12 can be arranged closer to the peripheral position of the battery 1000 relative to the first heat exchange section 11.

[0253] The second heat exchange section 12 is bent to form a U-shaped area 120 , that is, in a direction from one end of the second heat exchange section 12 toward the other end, the second heat exchange section 12 extends along a U-shaped line to form a U-shaped area 120 .

[0254] The first heat exchange section 11 is bent and disposed in the U-shaped area 120 , that is, the first heat exchange section 11 is arranged in the space enclosed by the second heat exchange section 12 , and the first heat exchange section 11 extends along a non-straight line on the inner side of the second heat exchange section 12 , and has at least one bending position.

[0255] It should be noted that, in the above embodiment, only the first heat exchange section 11 is limited to be bent and arranged in the U-shaped area 120, and 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 be arranged along the length direction of the battery cell 2011 (such as Figure 4 The battery cell 2011 extends in the Y direction as shown in the figure, and after extending to a certain length, extends in the width direction of the battery cell 2011 (as shown in the figure in the figure). Figure 4Alternatively, the first heat exchange section 11 may extend along the width direction of the battery cell 2011, bend toward the length direction of the battery cell 2011 after extending to a certain length, and then continue to extend along the width direction of the battery cell 2011 and bend along the length direction.

[0256] The first heat exchange section 11 and the second heat exchange section 12 are connected in a bent manner, that is, one end of the first heat exchange section 11 is connected to one end of the second heat exchange section 12, and the connection position between the first heat exchange section 11 and the second heat exchange section 12 is a bent non-linear structure. 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 segment.

[0257] Among them, the first heat exchange section 11 and the second heat exchange section 12 are connected, so that one of the end of the first heat exchange section 11 away from the second heat exchange section 12 and the end of the second heat exchange section 12 away from the first heat exchange section 11 can be used as the liquid inlet end and the other can be used as the liquid outlet end, so that when the first heat exchange channel 10 performs heat exchange, the heat exchange medium can flow from the first heat exchange section 11 to the second heat exchange section 12, and can also flow from the second heat exchange section 12 to the first heat exchange section 11.

[0258] Among them, 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 first heat exchange section 11 connected to 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 exchange element 100 performs heat exchange operation, the heat exchange fluid in the first heat exchange channel 10 can flow to the second heat exchange section 12 along the first heat exchange channel 10, and the heat exchange fluid can also flow from the second heat exchange section 12 to the first heat exchange section 11.

[0259] The battery cells 2011 located at the outermost circumference of the battery assembly 200 may refer to the battery cells 2011 adjacent to the side walls of the battery 1000 in the battery assembly 200, and the battery cells 2011 adjacent to structures such as the end plates in the battery 1000. The outermost battery cells 2011 constitute peripheral battery cells, and at least part of the second heat exchange section 12 is bonded to the peripheral battery cells. The second heat exchange section 12 may be partially bonded to the peripheral battery cells or partially bonded to the peripheral battery cells. The second heat exchange section 12 may also be fully bonded to the peripheral battery cells or partially bonded to the peripheral battery cells.

[0260] Among them, the first heat exchange section 11 is located in the U-shaped area 120 of the second heat exchange section 12, and the second heat exchange section 12 can be at the outermost side of the first heat exchange channel 10 in the circumferential direction. The first heat exchange section 11 can be in contact with the battery cell 2011 located on the inner side of the peripheral 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 and dissipated, 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 down the battery cell 2011 located on the inner side of the peripheral battery cell in the battery assembly 200, and then flow to the second heat exchange section 12 to cool down the battery cell 2011 in the peripheral battery cell in the battery assembly 200.

[0261] At least a portion of the second heat exchange section 12 is bonded to the peripheral battery cells. The bonding here may refer to direct bonding between the heat exchange tubes forming the second heat exchange section 12 and the peripheral battery cells, or may refer to indirect bonding between the heat exchange tubes forming the second heat exchange section 12 and the peripheral battery cells. Similarly, the first heat exchange section 11 may also be directly bonded to or indirectly bonded to the battery cells 2011 in the middle of the battery assembly 200.

[0262] 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 cells 2011 in the peripheral battery cells in the battery assembly 200, and then flow to the first heat exchange section 11 to heat the battery cells 2011 in the middle of the battery assembly 200.

[0263] It is understandable that during the operation and use of the battery 1000, the battery cells 2011 in the battery 1000 will generate heat, wherein the peripheral battery cells and the battery cells 2011 in the middle position of the battery assembly 200 have different heat dissipation environments. Specifically, the battery cells 2011 in the peripheral battery cells can dissipate heat outwards more easily through the side walls or end plates of the battery 1000 and other structures, and are less affected by the heat dissipation of adjacent battery cells 2011, while the battery cells 2011 in the middle position of the battery assembly 200 are more difficult to dissipate heat and are more affected by the heat dissipation of adjacent battery cells 2011, resulting in different heat dissipation conditions of the battery cells 2011 at different positions of the battery assembly 200, resulting in a relatively uneven temperature distribution in the battery 1000 after the battery 1000 is in operation, which makes the battery 1000 less stable during operation and the battery performance is prone to attenuation.

[0264] For example, the temperature distribution in the battery 1000 is uneven, which greatly increases the risk of capacity decay and thermal runaway of one or some battery cells 2011 in the battery assembly 200 due to excessive temperature, and adjacent battery cells 2011 may also experience temperature rise and capacity decay due to the influence of their heat changes. This reduces the overall operating stability of the battery 1000 and the battery performance. The battery performance here refers to the performance indicators of the battery 1000, such as capacity, charge and discharge rate, and voltage.

[0265] It can be understood that, during the process of the heat exchange fluid flowing in the first heat exchange channel 10, the heat exchange effect of the heat exchange fluid gradually decreases. For example, when the heat exchange element 100 cools the battery assembly 200, the heat of the battery cell 2011 is gradually transferred to the heat exchange fluid, so that the temperature of the heat exchange fluid gradually increases during the process of flowing along the first heat exchange channel 10, and the heat exchange fluid with a higher temperature has a poor cooling effect on the battery cell 2011; when the heat exchange element 100 heats the battery assembly 200, the heat in the heat exchange fluid is gradually transferred to the battery cell 2011, so that the temperature of the heat exchange fluid gradually decreases during the process of flowing along the first heat exchange channel 10, and the heat exchange fluid with a lower temperature has a poor heating effect on the battery cell 2011.

[0266] When the heat exchange component 100 is cooling the battery assembly 200, the heat exchange fluid can flow from the first heat exchange section 11 to the second heat exchange section 12 while flowing along the first heat exchange channel 10, so that the battery cells 2011 in the middle of the battery assembly 200 can be cooled first, and then the heat exchange fluid can cool the battery cells 2011 in the peripheral battery cells. Since the battery cells 2011 in the peripheral battery cells have better heat dissipation, the higher temperature heat exchange fluid flowing to the second heat exchange section 12 can still better meet the heat dissipation needs of the battery cells 2011 in the peripheral battery cells, so that both the peripheral battery cells and the battery cells 2011 in the middle of the battery assembly 200 can obtain good cooling effects, and then the temperatures of the peripheral battery cells and the battery cells 2011 in the middle of the battery assembly 200 after cooling and heat dissipation are relatively consistent, so that the temperature distribution in the battery 1000 is more uniform.

[0267] When the heat exchange component 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 while flowing along the first heat exchange channel 10, so that the battery cells 2011 in the peripheral battery cells can be heated first, and the heat exchange fluid can then cool the battery cells 2011 in the middle of the battery assembly 200. Since the battery cells 2011 in the peripheral battery cells have better heat dissipation, the temperature of the battery cells 2011 in the peripheral battery cells is easier to drop, and the heat exchange fluid first heats the battery cells 2011 in the peripheral battery cells, and the heat exchange fluid with a higher temperature can well meet its heating needs.

[0268] Since the heat dissipation of the battery cells 2011 in the middle of the battery assembly 200 is poor, the lower temperature heat exchange fluid flowing in the first heat exchange section 11 can cooperate with the heat generated by the battery cells 2011 to meet their heating needs well, so that both the peripheral battery cells and the battery cells 2011 in the middle of the battery assembly 200 can obtain good heating effects, and then the temperatures of the peripheral battery cells and the battery cells 2011 in the middle of the battery assembly 200 after heating are relatively consistent, making the temperature distribution in the battery 1000 more uniform.

[0269] In the above embodiment, by setting the first heat exchange channel 10 in the heat exchange element 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 area 120 and at least partially fits with the peripheral battery monomer, and the first heat exchange section 11 is arranged in the U-shaped area, so that the heat exchange element 100 has better heat dissipation and cooling effects and heating and heating effects when performing heat exchange operations on the battery assembly 200, so that the temperature distribution in the battery 1000 is more uniform, so that the battery 1000 can operate more stably and maintain good battery performance.

[0270] In one embodiment of the present application, reference Figure 4 As shown, the first heat exchange section 11 and the second heat exchange section 12 can be bent in the same plane.

[0271] Among them, 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 the side surface of the battery assembly 200 in the second direction.

[0272] In the above embodiment, by setting the first heat exchange section 11 and the second heat exchange section 12 to bend in the same plane, the first heat exchange channel 10 can exchange heat for the battery 1000 in the same plane. Therefore, the structure of the first heat exchange channel 10 can be simplified, the production difficulty of the first heat exchange channel 10 can be reduced, and the space occupied by the first heat exchange channel 10 can also be reduced.

[0273] In one embodiment of the present application, Figure 4 As shown, 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 the third direction, and 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 portion 121, a third heat exchange portion 122 and a fourth heat exchange portion 125 connected to each other; the second heat exchange portion 121 extends and fits to the first group of battery cells 202 to enable heat exchange, and / or, the third heat exchange portion 122 extends and fits to the second group of battery cells 203 to enable heat exchange, and / or, the fourth heat exchange portion 125 extends and fits to the third group of battery cells 204 to enable heat exchange.

[0274] Among them, 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 are arranged to extend along the first direction, and 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 are arranged to extend along the third direction. The stacking arrangement here may refer to the stacking arrangement of multiple battery cells 2011 along the thickness direction of the battery cell 2011, or may refer to the stacking arrangement of multiple battery cells 2011 along the length direction of the battery cell 2011.

[0275] 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, which may mean that the battery cell 2011 at one end of the first group of battery cells 202 in the first direction may 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 may be adjacent to the battery cell 2011 in the first group of battery cells 202, and the battery 1000 single cell of the third group of battery cells 204 at one end of the third direction may be adjacent to the battery cell 2011 in the first group of battery cells 202, and the first group of battery cells 202, the second group of battery cells 203 and the third group of battery cells 204 may all be arranged adjacent to the side wall of the battery 1000.

[0276] Among them, 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.

[0277] Either the second heat exchange unit 121 is in contact with the first group of battery cells 202 and the fourth heat exchange unit 125 is in contact with the second group of battery cells 203, and the third heat exchange unit 122 is not in contact with the second group of battery cells 203; or the second heat exchange unit 121 is in contact with the first group of battery cells 202 and the third heat exchange unit 122 is in contact with the second group of battery cells 203, and the fourth heat exchange unit 125 is in contact with the third group of battery cells 204.

[0278] The second heat exchange part 121, the third heat exchange part 122 and the fourth heat exchange part 125 in the second heat exchange section 12 can cooperate to form a U-shaped area 120. Specifically, the third heat exchange part 122 and the fourth heat exchange part 125 can be respectively connected to the two ends of the second heat exchange part 121. When the heat exchange fluid flows in the second heat exchange section 12, it can flow along the third heat exchange part 122, the second heat exchange part 121 and the fourth heat exchange part 125. The heat exchange fluid can also flow along the fourth heat exchange part 125, the second heat exchange part 121 and the third heat exchange part 122.

[0279] For example Figure 4 As shown, the first direction may be the thickness direction of the battery cell 2011, that is, Figure 4 The second direction may be the length direction of the battery cell 2011, i.e., the Y direction shown in the figure. Thus, the first group of battery cells 202 includes a plurality of battery cells 2011 stacked along the thickness direction of the battery cell 2011, the second group of battery cells 203 includes a plurality of battery cells 2011 stacked along the length direction of the battery cell 2011, and the third group of battery cells 204 includes a plurality of battery cells 2011 stacked along the length direction of the battery cell 2011. Figure 4 As shown, 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 the two ends of the battery assembly 200 in the X direction.

[0280] When the heat exchange element 100 exchanges heat with the battery assembly 200, for example, when the heat exchange element 100 heats the battery assembly 200, the heat exchange fluid can flow into the second heat exchange section 12 through the fourth heat exchange portion 125 and then heat the first group of battery cells 202 and the second group of battery cells 203 in the peripheral battery cells along the second heat exchange portion 121 and the third heat exchange portion 122, or the heat exchange fluid can flow into the second heat exchange section 12 through the third heat exchange portion 122 and then heat the first group of battery cells 202 and the second group of battery cells 203 in the peripheral battery cells along the second heat exchange portion 121 and the fourth heat exchange portion 125. One group of battery cells 202 and a 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 part 125, the second heat exchange part 121 and the third heat exchange part 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 part 122, the second heat exchange part 121 and the fourth heat exchange part 125.

[0281] The heat exchange fluid with a lowered temperature then flows out to the first heat exchange section 11 to heat the battery cell 2011 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 in the middle of the battery assembly 200, and the heat exchange fluid with an increased temperature flows into the second heat exchange section 12 to cool the peripheral battery cells.

[0282] In the above embodiment, by arranging the second heat exchange section 12, the second heat exchange section 121, the third heat exchange section 122 and the fourth heat exchange section 125 to fit 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 element 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 element 100 performs heat exchange operations on the battery assembly 200, the temperature distribution in the battery 1000 is more uniform.

[0283] In one example of this application, Figure 4 As shown, a plurality of first heat exchange parts 111 may be arranged at intervals along the third direction, each first heat exchange part 111 extends linearly along the first direction, and the third direction is arranged at an angle to the first direction.

[0284] The term “the third direction is arranged at an angle to the first direction” is intended to indicate that the third direction and the first direction may be arranged perpendicularly or intersectingly and non-perpendicularly. For example, the third direction and the first direction may be arranged at an angle of 30°, 60°, 80°, 120°, 150° or 170°. Figure 1As shown, 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 parts 111 extend along the length direction of the battery cell 2011 and are arranged at intervals along the thickness direction of the battery cell 2011. In this way, multiple first heat exchange parts 111 are bent and connected to form an S-shaped heat exchange channel, which can realize heat exchange for multiple battery cells 2011.

[0285] In the above embodiment, by setting the first heat exchange part 111 to extend in a straight line along the first direction, the production difficulty of the first heat exchange part 111 can be reduced, and the production complexity of the first heat exchange channel 10 can be reduced. At the same time, the straight tube can also increase the flow rate of the heat exchange fluid, thereby improving the heat exchange effect of the first heat exchange channel 10.

[0286] In one example of this application, Figure 4 As shown, the third heat exchange portion 122 and the fourth heat exchange portion 125 may be extended along the third direction, and the first heat exchange portion 111 and the second heat exchange portion 121 may both be extended along the first direction.

[0287] Furthermore, the third heat exchange portion 122 and the fourth heat exchange portion 125 can both extend in a straight line along the third direction, and the first heat exchange portion 111 and the second heat exchange portion 121 can both extend in a straight line along the first direction. The linear structure is simple, convenient to produce, and easy to arrange, thereby further reducing the production complexity and production cost of the first heat exchange channel 10.

[0288] In the above embodiment, by arranging the third heat exchange part 122 and the fourth heat exchange part 125 to extend along the third direction, the first heat exchange part 111 and the second heat exchange part 121 are both extended along the first direction, which can be beneficial to the circuitous arrangement of the first heat exchange channel 10, 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, through such an arrangement, the structure of the first heat exchange channel is also made more compact and reliable.

[0289] In one example of this application, reference Fig. 9 As shown, the first heat exchange portion 111 , the third heat exchange portion 122 and the fourth heat exchange portion 125 may all be extended along the first direction, and the second heat exchange portion 121 may be extended along the third direction.

[0290] For example Fig. 9As shown, the third direction is the length direction of the battery cell 2011, that is, the Y direction shown in the figure, and the first direction is the thickness direction of the battery cell 2011, that is, the X direction shown in the figure. Therefore, the first heat exchange part 111, the third heat exchange part 122 and the fourth heat exchange part 125 extend along the thickness direction of the battery cell 2011, and the third heat exchange part 122 and the fourth heat exchange part 125 are respectively arranged on both sides of the battery 1000 in the Y direction, and are used to exchange heat with the battery assembly 200 close to the side of the battery 1000. The second heat exchange part 121 extends along the length direction of the battery cell 2011 and is arranged at one of the two ends of the battery 1000 in the X direction, and is used to exchange heat with the battery cell 2011 at one end of the battery 1000 in the X direction.

[0291] Furthermore, the first heat exchange portion 111, the third heat exchange portion 122 and the fourth heat exchange portion 125 extend linearly along the first direction, and the second heat exchange portion 121 extends linearly along the third direction. The linear structure is simple, convenient to produce, and easy to arrange, thereby further reducing the production complexity and production cost of the first heat exchange channel 10.

[0292] In the above embodiment, by arranging the first heat exchange part 111, the third heat exchange part 122 and the fourth heat exchange part 125 to extend along the first direction, and the second heat exchange part 121 to extend along the third direction, it can be beneficial to the circuitous arrangement of the first heat exchange channel 10, thereby reducing the production difficulty of the first heat exchange channel 10 and reducing the production cost of the heat exchange component 100.

[0293] In one example of this application, reference Figure 4 As shown, the third heat exchange portion 122 and the fourth heat exchange portion 125 may both be extended along the third direction. In the third direction, the length of the fourth heat exchange portion 125 may be less than or equal to the length of the third heat exchange portion 122 .

[0294] When the length of the fourth heat exchange portion 125125 is equal to the length of the third heat exchange portion 122, the fourth heat exchange portion 125, the second heat exchange portion 121 and the third heat exchange portion 122 are sequentially connected to form a standard U-shaped flow channel; when the length of the fourth heat exchange portion 125 is less than the length of the third heat exchange portion 122, it is beneficial to avoid other flow channel sections (for example, avoid Figure 4 The first inlet and outlet section 15 shown in FIG. 10 is arranged to avoid other heat exchange channels or other components, thereby facilitating the layout of the first heat exchange channel 10. For example Figure 4 As shown in the figure, the length of the fourth heat exchange part 125 is recorded as b1, and the length of the third heat exchange part 122 is recorded as a1, then b1 may be less than or equal to a1.

[0295] In the above embodiment, by setting the length of the fourth heat exchange part 125 to be less than or equal to the length of the third heat exchange part 122, the sizes of the two ends of the U-shaped area 120 can be 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 part 125 to be less than the length of the third heat exchange part 122 in the first direction, it is convenient to connect the fourth heat exchange part 125 to the collector 20, and it is also possible to make the fourth heat exchange part 125 avoid other channel sections, other channel structures or other components of the first heat exchange channel 10.

[0296] In one example of this application, reference Figure 4 and Fig. 9 As shown, the first heat exchange portion 111 and the third heat exchange portion 122 may extend along the first direction, and the second heat exchange portion 121 may extend along the third direction. In the first direction, the length of the third heat exchange portion 122 is greater than the length of the first heat exchange portion 111. For example, Fig. 9 In the embodiment, the length of the first heat exchange portion 111 is denoted as c1, and the length of the third heat exchange portion 122 is denoted as a2, and a2 is greater than c1.

[0297] In the above embodiment, by setting the length of the third heat exchange part 122 in the first direction to be greater than the length of the first heat exchange part 111, the first heat exchange section 11 can be enclosed in the U-shaped area 120 of the second heat exchange section 12, the length of the third heat exchange part 122 is increased, and the heat exchange area of ​​the third heat exchange part 122 is increased, so that the second heat exchange section 12 can enclose a larger U-shaped area 120, thereby improving the heat exchange effect of the heat exchange element 100; by setting the length a2 of the third heat exchange part 122 equal to the length c1 of the first heat exchange part 111, the length dimensions of the third heat exchange part 122 extending along the first direction of the first heat exchange channel 10 and the multiple first heat exchange parts 111 can be 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.

[0298] In one example of this application, Figure 4 As shown, the fourth heat exchange portion 125 may extend along the third direction and extend to a position close to one of the plurality of first heat exchange portions 111 that is farthest from the second heat exchange portion 121 .

[0299] Specifically, the fourth heat exchange part 125 extends along the third direction, one end of the fourth heat exchange part 125 is connected to the second heat exchange part 121, and the other end of the fourth heat exchange part 125 extends to a position close to one of the multiple first heat exchange parts 111 that is farthest from the second heat exchange part 121, that is, the other end of the fourth heat exchange part 125 extends to be flush with the first heat exchange part 111 that is farthest from the second heat exchange part 121, or, the other end of the fourth heat exchange part 125 extends to be close to the first heat exchange part 111 that is farthest from the second heat exchange part 121, or, the other end of the fourth heat exchange part 125 extends to exceed the first heat exchange part 111 that is farthest from the second heat exchange part 121.

[0300] In this way, the length of the fourth heat exchange part 125 can be increased, the heat exchange area between the fourth heat exchange part 125 and the battery assembly 200 can be increased, the heat exchange effect of the heat exchange element 100 is further improved, and it is also beneficial to the layout of the first heat exchange channel 10.

[0301] In the above embodiment, by setting the fourth heat exchange part 125 to extend along the third direction and extend to a position close to one of the multiple first heat exchange parts 111 that is farthest from the second heat exchange part 121, the heat exchange area of ​​the fourth heat exchange part 125 can be increased, so that the first heat exchange channel 10 can exchange heat with the multiple battery cells 2011 arranged corresponding to the first heat exchange channel 10 as much as possible, thereby improving the comprehensiveness of heat exchange of the first heat exchange channel 10, and further improving the heat exchange effect of the battery 1000.

[0302] In some examples of this application, reference Figure 4 As shown, the second heat exchange section 12 may also include: a second bending portion 123 and a third bending portion 124, the second bending portion 123 and the third bending portion 124 are both arc-shaped, and the second bending portion 123 is connected between the first end of the third heat exchange portion 122 and the second heat exchange portion 121, and the third bending portion 124 is connected between the second end of the third heat exchange portion 122 and the first heat exchange portion 111.

[0303] Specifically, the second bending portion 123 is used to connect the second heat exchange portion 121 and the third heat exchange portion 122, and the third bending portion 124 is used for the third heat exchange portion 122 and the first heat exchange portion 111. The second bending portion 123 is arc-shaped, that is, the second bending portion 123 extends along the arc line, and the fluid flow directions at both ends of the second bending portion 123 have a certain angle, and the third bending portion 124 is arc-shaped, that is, the third bending portion 124 extends along the arc line, and the fluid flow directions at both ends of the third bending portion 124 have a certain angle.

[0304] Thus, the second bend 123 and the third bend 124 can change the flow direction of the heat exchange fluid, so that the second heat exchange section 12 extends within the preset area and is used for heat exchange with the battery assembly 200. At the same time, the arc-shaped 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. In addition, by providing the second bend 123 and the third bend 124, the circuitous arrangement of the first heat exchange channel 10 can also be achieved, so that the heat exchange area of ​​the first heat exchange channel 10 can be increased and the structure can be more compact, which is more conducive to realizing the miniaturization design of the battery and improving the volume energy density of the battery 1000.

[0305] In the above embodiment, by setting the second bend portion 123 and the third bend portion 124, the flow direction of the fluid in the first heat exchange channel 10 can be changed, and a smooth transition between the third heat exchange portion 122 and the second heat exchange portion 121 can be achieved, and a smooth transition between the third heat exchange portion 122 and the first heat exchange portion 111 can be achieved. Therefore, the second bend portion 123 and the third bend portion 124 can reduce the flow resistance of the fluid flow 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.

[0306] In some specific embodiments of the present application, reference is made to Figure 4 As shown, the second bending portion 123 may be in a quarter arc shape.

[0307] That is to say, the second bend 123 can extend along a semicircular arc line, specifically, the second bend 123 can extend along a quarter-circular arc line that is protruding away from the first heat exchange section 11. The angle between the inlet and the outlet of the second bend 123 can be 90°. The second bend 123 is similar to a 90° elbow in a pipe material, which can change the direction of the flow channel so that the heat exchange fluid changes the flow direction of the fluid 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. Among them, 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 vertically to each other, so that the layout of the second heat exchange section 12 can be more regular, and the flow channel of the second heat exchange section 12 can be more in line with 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.

[0308] In other embodiments, the bending degree of the second bending portion 123 can be adjusted according to needs, for example, it can be 50°, 80°, 120°, 135°, 150°, etc., which is not limited to the embodiments of the present application.

[0309] In the above embodiment, by setting the second bending portion 123 to be a quarter arc shape, the flow direction of the fluid can be changed from the original flow direction to a direction perpendicular to the original flow direction after passing through the second bending portion 123; at the same time, the arc shape can also reduce the resistance to the fluid flow, so that the fluid can flow smoothly in the second bending portion 123, effectively preventing the fluid from flowing too slowly and causing a decrease in heat exchange efficiency.

[0310] In some specific embodiments of the present application, reference is made to Figure 4 As shown, the third bending portion 124 may be in the shape of a quarter arc.

[0311] That is to say, the third bending portion 124 can extend along a semicircular arc line, specifically, the third bending portion 124 can extend along a quarter arc line that is convex away from the first heat exchange section 11. It can be understood that the angle between the inlet and the outlet of the third bending portion 124 is 90°, and the third bending portion 124 is similar to a 90° elbow in a pipe material, which can change the direction of the flow channel, so that the heat exchange fluid changes the flow direction of the fluid by 90° after passing through the third bending portion 124, 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. Among them, the third bending portion 124 connects the third heat exchange portion 122 and the first heat exchange portion 111. At this time, the third heat exchange portion 122 and the first heat exchange portion 111 are arranged perpendicular to each other, so that the layout of the first heat exchange channel 10 can be more regular, and the first heat exchange channel 10 can be more in line with the layout of the battery assembly 200, thereby increasing the heat exchange effect of the first heat exchange channel on the battery assembly 200.

[0312] In other embodiments, the bending degree of the third bending portion 124 can be adjusted according to needs, for example, it can be 50°, 80°, 120°, 135°, 150°, etc., which is not limited to the embodiments of the present application.

[0313] In the above embodiment, by setting the third bending portion 124 to be a quarter arc shape, the flow direction of the heat exchange fluid can be changed from the original flow direction to a direction perpendicular to the original flow direction after passing through the third bending portion 124; at the same time, the arc-shaped third bending portion 124 can also reduce the resistance to fluid flow, so that the heat exchange fluid can flow smoothly in the third bending portion 124, effectively preventing the heat exchange fluid from flowing too slowly and causing a decrease in heat exchange efficiency.

[0314] In some examples of this application, reference Fig.10 and Fig.24As shown, the peripheral battery cells may further include a fourth group of battery cells 205, wherein the fourth group of battery cells 205 includes a plurality of battery cells 2011 arranged along the first direction, and the second heat exchange section 12 further includes a fifth heat exchange portion 127, wherein the fifth heat exchange portion 127 closes at least a portion of the opening of the U-shaped region 120 formed by the second heat exchange portion 121, the third heat exchange portion 122 and the fourth heat exchange portion 125, and the fifth heat exchange portion 127 extends and fits the fourth group of battery cells 205 to enable heat exchange.

[0315] Among them, the peripheral battery cells also include a fourth group of battery cells 205. Specifically, the fourth group of battery cells 205 can be arranged in a third direction with the first group of battery cells 202. The fourth group of battery cells 205 is arranged on the side of the battery assembly 200 close to the side wall of the battery 1000. The fifth heat exchange part 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 performs heat exchange with the fourth group of battery cells 205 along the fifth heat exchange part 127.

[0316] When the heat exchange component 100 exchanges heat with the battery assembly 200, the heat exchange fluid can flow along the second heat exchange section 12 to perform heat exchange operations on the battery cells 2011 arranged in the first direction close to the side wall of the battery 1000 in the battery assembly 200, and the battery cells 2011 arranged in the third direction close to the side wall of the battery 1000, and the heat exchange fluid then flows into the first heat exchange section 11 to perform heat exchange operations on the battery cells 2011 located on the inner side of the peripheral battery cells in the battery assembly 200, or the heat exchange fluid flows in the opposite direction to perform heat exchange operations.

[0317] In the above embodiment, by providing the fifth heat exchange portion 127 in the second heat exchange section 12 to fit with the fourth group of battery cells 205, the second heat exchange section 12 can perform heat exchange on the four sides of the battery assembly 200. In this way, the second heat exchange section 12 of the first heat exchange channel 10 can perform heat exchange on the four sides of the battery assembly 200. This can improve the heat exchange effect on the four sides of the battery assembly 200 and enhance the temperature uniformity of the battery assembly 200.

[0318] In one example of this application, reference Fig.10 As shown, the fifth heat exchange part 127 can be arranged opposite to the second heat exchange part 121. The fifth heat exchange part 127 is connected between the second end of the third heat exchange part 122 and the first heat exchange section 11, and is connected to the third heat exchange part 122 at an angle, and is connected to the first heat exchange section 11 at an angle.

[0319] It should be noted that, in the above embodiment, the second heat exchange portion 121 is arranged on one side of the first heat exchange section 11 in the third direction (for example Fig.10The fifth heat exchange portion 127 is arranged opposite to the second heat exchange portion 121, that is, the fifth heat exchange portion 127 is arranged on the other side of the first heat exchange section 11 in the third direction (for example, Fig.10 The third heat exchange portion 122 is arranged on one side of the first heat exchange section 11 in the first direction of the first heat exchange section 11 (for example, Fig.10 The two ends of the third heat exchange part 122 in the Y direction are respectively connected to the second heat exchange part 121 and the fifth heat exchange part 127.

[0320] Among them, the fifth heat exchange part 127 is connected to the third heat exchange part 122 at an angle, for example, the fifth heat exchange part 127 is connected to the third heat exchange part 122 and is arranged at an angle greater than 0° and less than or equal to 180°. For example, the angle between the fifth heat exchange part 127 and the third heat exchange part 122 is 30°, 45°, 60°, 90°, 120°, 135° or 150°, etc. The fifth heat exchange part 127 is connected to the first heat exchange section 11 at an angle, for example, the fifth heat exchange part 127 is connected to the first heat exchange section 11 and is arranged at an angle greater than 0° and less than or equal to 180°. For example, the angle between the fifth heat exchange part 127 and the third heat exchange part 122 is 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0321] Furthermore, the fifth heat exchange portion 127 and the third heat exchange portion 122 may be connected via an arc segment. For example, the fifth heat exchange portion 127 and the third heat exchange portion 122 may be connected via a quarter arc.

[0322] Furthermore, the fifth heat exchange portion 127 and the first heat exchange section 11 may be connected via an arc segment. For example, the fifth heat exchange portion 127 and the first heat exchange section 11 may be connected via a semicircular arc.

[0323] In the above embodiment, by arranging the fifth heat exchange part 127 relative to the second heat exchange part 121 and connecting the fifth heat exchange part 127 between the third heat exchange part 122 and the first heat exchange section 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.

[0324] In one example of this application, reference Fig.12 As shown, the fifth heat exchange part 127 and the second heat exchange part 121 can be arranged relative to each other, one end of the fifth heat exchange part 127 is connected to the end of the fourth heat exchange part 125 away from the second heat exchange part 121, and the fifth heat exchange part 127 is connected to the fourth heat exchange part 125 at an angle.

[0325] The fifth heat exchange portion 127 is connected to the fourth heat exchange portion 125 at an angle, for example, the fifth heat exchange portion 127 is connected to the fourth heat exchange portion 125 and is arranged at an angle greater than 0° and less than or equal to 180°. For example, the angle between the fifth heat exchange portion 127 and the fourth heat exchange portion 125 is 30°, 45°, 60°, 90°, 120°, 135° or 150°, etc.

[0326] For example, refer to Fig.13 The second heat exchange part 121 and the fifth heat exchange part 127 are respectively arranged on both sides of the first heat exchange section 11 in the X direction, the third heat exchange part 122 and the fourth heat exchange part 125 are respectively arranged on both sides of the first heat exchange section 11 in the Y direction, the fifth heat exchange part 127 extends along the Y direction, and the end of the fifth heat exchange part 127 close to the coordinate origin in the Y direction is connected to the fourth heat exchange part 125, and the end of the fifth heat exchange part 127 far from the coordinate origin in the Y direction extends toward the third heat exchange section 13.

[0327] The fifth heat exchange portion 127 and the fourth heat exchange portion 125 may be connected by an arc. For example, the fifth heat exchange portion 127 and the fourth heat exchange portion 125 may be connected by a quarter arc.

[0328] In the above embodiment, by arranging the fifth heat exchange part 127 relative to the second heat exchange part 121 and connecting the fifth heat exchange part 127 to the fourth heat exchange part 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 .

[0329] In the above embodiment, by arranging the fifth heat exchange part 127 relative to the second heat exchange part 121, and the fifth heat exchange part 127 is connected between the second end of the third heat exchange part 122 and the first heat exchange section 11, or one end of the fifth heat exchange part 127 is connected to the end of the fourth heat exchange part 125 away from the second heat exchange part 121, it is possible to realize the arrangement of a variety of heat exchange channels, thereby satisfying the heat exchange requirements of a variety of batteries 1000.

[0330] In some examples of this application, reference Figure 4 As shown, the first heat exchange section 11 may include a plurality of first heat exchange parts 111, which are arranged at intervals and connected by bending in sequence, and at least one battery unit 201 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 to enable heat exchange.

[0331] The first heat exchange section 11 includes a plurality of first heat exchange parts 111. For example, the first heat exchange section 11 may have two, three, four, five, six, etc. first heat exchange parts 111. The plurality of first heat exchange parts 111 are bent and connected in sequence. That is, the plurality of 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, the two connected first heat exchange parts 111 may be bent along a fold line or along an arc line.

[0332] It should be noted that the shape of the first heat exchange portion 111 can be various, for example, the first heat exchange portion 111 can be linear or arc-shaped. The extension direction of the first heat exchange portion 111 can also be various, for example, it can extend along the length direction or thickness direction of the battery cell 2011. In this way, multiple first heat exchange portions 111 are bent and connected in sequence, so that the first heat exchange section 11 can form an S-shaped, X-shaped, V-shaped, and other forms of heat exchange channels.

[0333] The first heat exchange parts 111 can be arranged at intervals in the first direction and connected by bending in sequence. The first heat exchange parts 111 can also be arranged at intervals in the third direction and connected in sequence. The first heat exchange parts 111 can be fitted with multiple battery cells 201 arranged along the first direction in the battery assembly 200 for heat exchange. When the heat exchange tube and the battery assembly 200 perform heat exchange, the heat exchange fluid in the first heat exchange channel 10 can flow along the multiple first heat exchange parts 111 in the first heat exchange section 11. The heat exchange fluid can be heated or cooled in sequence from the outermost battery cell 201 of the battery assembly 200 toward the inner battery cell 201 along the third direction. The heat exchange fluid can also be heated or cooled from the inner battery cell 201 in the battery assembly 200 toward the outermost battery cell 201 along the first direction.

[0334] The battery assembly 200 may have one or more battery cells 201 at both ends in the third direction to form a first group of battery cells 202, and the first heat exchange section 11 may have one or more first heat exchange parts 111 that are bonded to the first group of battery cells 202. For example, one first heat exchange part 111 and a second heat exchange part 121 are bonded to the first group of battery cells 202 together, or two, three, four, etc. first heat exchange parts 111 and one second heat exchange part 121 are bonded to the first group.

[0335] In the above embodiment, by setting up multiple first heat exchange parts 111, the heat exchange area of ​​the first heat exchange section 11 can be increased, and then the heat exchange area of ​​the first heat exchange channel 10 can be increased, so that the heat exchange effect of the first heat exchange channel 10 can be improved; on the other hand, since the internal battery cells 2011 are wrapped by the external battery cells 2011, the temperature difference between the internal battery cells 2011 is not large. Therefore, by setting up multiple first heat exchange parts 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.

[0336] In some specific embodiments of the present application, Figure 4 As shown, the first heat exchange section 11 may further include: a first bending portion 112 , the first bending portion 112 is arc-shaped, and is bent and connected between two adjacent first heat exchange portions 111 .

[0337] Among them, the first bending portion 112 is arc-shaped, that is, the first bending portion 112 extends along the arc line, and the fluid flow channel directions at both ends of the first bending portion 112 have a certain angle, thereby, the first bending portion 112 can change the flow direction of the fluid, and then the two connected first heat exchange parts 111 can be extended and arranged in a preset area, thereby increasing the heat exchange area of ​​the first heat exchange section 11 and improving the heat exchange efficiency of the first heat exchange section 11. At the same time, the first bending portion 112 is arc-shaped, wherein the arc-shaped bending structure 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 section 11.

[0338] Furthermore, the number of the first bending portions 112 can be one, two, three or more. The first bending portions 112 can make the first heat exchange flow section circuitous, 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.

[0339] In the above embodiment, by setting the first bending portion 112, the fluid flow direction inside the first heat exchange section 11 can be changed, and a smooth transition between the two first heat exchange portions 111 can be achieved, thereby realizing a circuitous arrangement of the first heat exchange channel 10. As a result, the contact area between the single battery cell 2011 and the first heat exchange channel 10 can be increased, 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 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 section 11.

[0340] In some specific examples of this application, reference Figure 4 As shown, the first bending portion 112 may be in a semicircular arc shape.

[0341] That is to say, the first bending portion 112 can extend along a semicircular arc line. Specifically, the first bending portion 112 can extend along a semicircular arc line that is raised in the direction away from the two first heat exchange portions 111 connected to the first bending portion 112. Specifically, the angle between the inlet and outlet of the first bending portion 112 is 180°, and the flow directions at the outlet and inlet positions of the first bending portion 112 are opposite, so that the two adjacent first heat exchange portions 111 are closer, and the structure of the entire first heat exchange section 11 is more compact and reliable. Among them, the first bending portion 112 is used to connect two first heat exchange portions 111 that are parallel to each other and arranged at intervals. In other embodiments, the bending degree of the first bending portion 112 can also be adjusted according to needs, for example, it can be 150°, 135°, etc., and the embodiments of the present application are not limited thereto.

[0342] The two first heat exchange parts 111 are formed into a "U"-shaped heat exchange channel through the first bending part 112. The first heat exchange section 11 may include 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 through the first bending part 112.

[0343] In the above embodiment, by setting the first bending portion 112 to be semicircular, the design diversity of the heat exchange flow channel can be increased, thereby improving the adaptability of the heat exchange element 100; at the same time, the semicircular structure is relatively simple, thereby reducing the production difficulty of the heat exchange element 100 and improving the production speed of the heat exchange element 100.

[0344] In one example of this application, reference Fig.25 As shown, the plurality of first heat exchange parts 111 of the first heat exchange section 11 may extend along the third direction and be sequentially connected in the first direction.

[0345] The first heat exchange part 111 extends along the third direction. Specifically, the multiple battery cells 2011 in the battery unit 201 can be stacked along the first direction. The battery cells 2011 extend along the third direction. The extension direction of the first heat exchange part 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 in their extension direction along the first heat exchange part 111.

[0346] In the above embodiment, by arranging the multiple first heat exchange parts 111 of the first heat exchange section 11 to extend along the 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 larger heat exchange area, so that when the heat exchange component 100 is arranged on the battery assembly 200, it can more conveniently and reliably meet the heat exchange area requirements of the battery assembly 200, and the difficulty of arranging the first heat exchange section 11 can be reduced to a certain extent.

[0347] In one example of this application, Figure 4 As shown, the plurality of first heat exchange parts 111 of the first heat exchange section 11 may extend along the first direction and be sequentially connected in the third direction.

[0348] The first heat exchange portion 111 extends along the first direction. The first heat exchange portion 111 may be bent and extended along the first direction. The first heat exchange portion 111 may also be extended in a straight line along the first direction. Figure 4 As shown, multiple battery cells 2011 are stacked in a first direction, and the battery cells 2011 extend along the first direction. Then, a first heat exchange portion 111 can span across the multiple battery cells 2011 in the first direction, and the first heat exchange portion 111 can perform heat exchange with the multiple battery cells 2011. The multiple first heat exchange portions 111 can cooperate to meet the heat exchange area requirements of a single battery cell 2011.

[0349] In the above embodiment, by arranging multiple first heat exchange parts 111 to extend along the first direction and be connected sequentially in the third direction, multiple first heat exchange parts 111 can cooperate to exchange heat for one battery cell 2011 to meet the required heat exchange area, so that when the first heat exchange section 11 is bent, the first heat exchange section 11 can have a smaller number of bends, so that the flow resistance in the first heat exchange section 11 is smaller, and the heat exchange fluid flows more smoothly and the pressure drop is reduced in the first heat exchange section 11, so that the heat exchange component 100 can better perform heat exchange operations on the battery assembly 200.

[0350] refer to Figure 4 and Fig.25 As shown, Figure 4 The first heat exchange portion 111 extends along the first direction, that is, the first heat exchange portion extends along the thickness direction of the battery cell 2011. Fig.25 The first heat exchange part 111 extends along the third direction, that is, the first heat exchange part extends along the length direction of the battery cell 2011. When the length of the first heat exchange part 111 is constant, the first heat exchange part 111 extending along the first direction can exchange heat for more battery cells 2011 than the first heat exchange part 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 parts 111 of the first heat exchange part 111 extending along the first direction will be closer than that of the first heat exchange part 111 extending along the third direction, so that the heat exchange effect will be better; when one battery cell 2011 is limited to exchange heat with two heat exchange parts, the number of first heat exchange parts 111 extending along the first direction and arranged along the third direction is lower than the number of first heat exchange parts 111 extending along the third direction and arranged at intervals along the first direction, that is, the number of required bends is small, and thus the first heat exchange part 11 is easy to form and easy to process.

[0351] Therefore, the first heat exchange part 111 extends along the first direction, which can not only meet the heat exchange effect, but also reduce the number of first heat exchange parts 111, thereby reducing the number of bending times of the first heat exchange channel 10, reducing the pressure drop of the heat exchange fluid in the first heat exchange channel 10, and improving the heat exchange efficiency. At the same time, it can also reduce the molding difficulty and production cost of the heat exchange component 100, and improve the production rate of the heat exchange component 100.

[0352] In one example of this application, Figure 4 As shown, the multiple first heat exchange parts 111 of the first heat exchange section 11 can extend along the first direction and be connected sequentially in the third direction, the first end of the third heat exchange part 122 is connected to the second heat exchange part 121 at an angle, the second end of the third heat exchange part 122 is connected to the one of the multiple first heat exchange parts 111 that is farthest from the second heat exchange part 121 along the third direction, and the second end of the third heat exchange part 122 is connected to the first heat exchange section 11 at an angle.

[0353] Among them, the first end of the third heat exchange part 122 is connected to the second heat exchange part 121 at an angle, for example, the first end can be connected to the second heat exchange part 121 at an acute angle, an obtuse angle or a right angle, and the angle between the first end of the third heat exchange part 122 and the second heat exchange part 121 can be reasonably set according to the arrangement requirements of the third heat exchange part 122 and the second heat exchange part 121 in the battery 1000. Similarly, the second end can also be connected to the first heat exchange section 11 at an acute angle, an obtuse angle or a right angle, and the angle between the second end of the third heat exchange part 122 and the first heat exchange section 11 can be reasonably set according to the arrangement requirements of the third heat exchange part 122 and the first heat exchange section 11 in the battery 1000.

[0354] Among them, since the second heat exchange part 121 is attached to the first group of battery cells 202, the one of the first heat exchange parts 111 that is farthest from the second heat exchange part 121 is the one of the first heat exchange parts 111 that is farthest from the first group of battery cells 202, and the one of the first heat exchange parts 111 that is farthest from the second heat exchange part 121 can be attached to the innermost battery cell 201 in the third direction among the battery cells 201.

[0355] When the heat exchange element 100 performs heat exchange operation, for example, when the heat exchange element 100 heats the battery assembly 200, the heat exchange fluid can heat the first group of battery cells 202 along the second heat exchange part 121 of the second heat exchange section 12, and then flow to the third heat exchange part 122 to heat the second group of battery cells 203, and then flow to the first heat exchange part 111 to heat the multiple battery cells 2011 in the inner battery unit 201, and the heat exchange fluid continues to heat the battery cells 2011 from the inside to the outside in the third direction along the multiple first heat exchange parts 111 in the first heat exchange section 11. When the heat exchange element 100 cools the battery assembly 200, the heat exchange fluid can flow along the first heat exchange channel 10 in the opposite direction.

[0356] In the above embodiment, by connecting the third heat exchange portion 122 to the second heat exchange portion 121 at an angle and connecting the third heat exchange portion 122 to the first heat exchange segment 11 at an angle, the second heat exchange segment 12 and the first heat exchange segment 11 can be arranged more conveniently when assembled in the battery 1000, which can meet the layout requirements of the heat exchange component 100 and the battery assembly 200, and has a simple structure and is easy to use.

[0357] The first section of the third heat exchange part 122 is connected to the second heat exchange part 121 and the second end is connected to the first heat exchange part 111 which is farthest from the second heat exchange part 121 in the third direction, so that when the heat exchange element 100 is performing heat exchange operation, the heat exchange element 100 can well cooperate with the heat dissipation of the battery assembly 200 at different positions, so that the battery 1000 can obtain a good heat exchange effect.

[0358] It is understandable that when the heat exchange fluid heats the peripheral battery cells in the battery assembly 200, since the peripheral battery cells dissipate heat quickly, when the heat exchange fluid flows from the second heat exchange part 121 to the third heat exchange part 122 for heating, the heat exchange fluid needs to have a higher temperature to meet the heating needs of the peripheral battery cells and the heating needs of other positions in the subsequent battery assembly 200. The temperature of the heat exchange fluid in the second heat exchange part 121 is relatively high. While it meets the heating needs of the peripheral battery cells well, it is easy to overheat after cooperating with other heat exchange parts for heating, causing the temperature of the peripheral battery cells to be too high, thereby resulting in uneven temperature distribution in the battery 1000.

[0359] In the above embodiment, by connecting the third heat exchange part 122 with the second heat exchange part 121 and the first heat exchange part 111 far away from the second heat exchange part 121, the heat exchange fluid can be well heated along the second heat exchange part 121 and the third heat exchange part 122 to the first group of battery cells 202 and the second group of battery cells 203202, so that the peripheral battery cells can obtain a good heating effect, and the heat exchange fluid after the temperature drops flows from the first heat exchange part 111 far away from the second heat exchange part 121 to the first heat exchange part 111 close to the second heat exchange part 121, so that the first heat exchange part 111 close to the second heat exchange part 121 can be the part with the lowest temperature of the heat exchange fluid, so that it can better cooperate with the second heat exchange part 121 to perform heating operations, reduce the possibility of excessive heating at the second heat exchange part 121 causing high temperature, so that the heat exchange component 100 has a better heating effect on the battery 1000 and makes the temperature distribution in the battery 1000 more uniform. Similarly, when the heat exchange element 100 cools down the battery assembly 200 , the second heat exchange portion 121 can also cooperate with the first heat exchange portion 111 close to the second heat exchange portion 121 to achieve a good cooling effect.

[0360] In the above embodiment, by connecting the third heat exchange part 122 with the second heat exchange part 121 and the first heat exchange part 111 away from the second heat exchange part 121, the heat exchange component 100 can better exchange heat for the battery assembly 200, and the temperature distribution in the battery 1000 can be more uniform, so that the battery 1000 can operate stably and the battery 1000 can maintain good battery performance.

[0361] In some specific embodiments of the present application, Figure 4 As shown, the first heat exchange channel 10 may further include: a third heat exchange section 13, the third heat exchange section 13 is connected to an 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 a side of the first heat exchange section 11 away from the third heat exchange part 122, and is connected to one of the multiple first heat exchange parts 111 that is closest to the second heat exchange part 121 along the third direction.

[0362] Among them, the third heat exchange section 13 is connected to the first heat exchange section 11 at an angle, for example, the third heat exchange section 13 and the first heat exchange section 11 can be connected at 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 and is arranged 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 is 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 away from the second heat exchange section 12, where the distance can refer to the distance 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 part 122, and the third heat exchange section 13 is connected to the other end of the first heat exchange section 11.

[0363] When the heat exchange element 100 performs a heating operation, the heat exchange fluid can flow in sequence 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 or flow in the opposite direction. Specifically, the heat exchange fluid flows along the first direction in the second heat exchange part 121 of the second heat exchange section 12 to the third heat exchange part 122, and then the heat exchange fluid flows along the third direction away from the second heat exchange part 121 to the first heat exchange part 111 in the third heat exchange part 122. The heat exchange fluid then flows along the third direction toward the second heat exchange part 121 in multiple first heat exchange parts 111, and then the heat exchange fluid flows along the third direction away from the second heat exchange part 121 in the third heat exchange section 13. Accordingly, when the heat exchange element 100 performs a cooling operation, the heat exchange fluid can flow in the opposite direction.

[0364] Specifically, when the heat exchange fluid flows along 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 close to 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 along the first direction away from the third heat exchange section 122 in the first heat exchange section 111 close to the second heat exchange section 121.

[0365] In the above embodiment, by providing the third heat exchange section 13 connected to the first heat exchange section 11 and in contact with the second group of battery cells 203, when the heat exchange element 100 exchanges heat for 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, so that the second heat exchange section 12, the first heat exchange section 11 and the third heat exchange section 13 can better cooperate to perform heat exchange operations.

[0366] In the above embodiment, by connecting the third heat exchange section 13 with the first heat exchange section 11 and fitting it with the second group of battery cells 203, the heat exchange component 100 can achieve more balanced heat exchange with the battery cells 2011 at different positions in the battery 1000, so that the temperature distribution of the battery 1000 after the heat exchange operation can be more uniform, thereby allowing the battery 1000 to operate more stably and reliably and maintain good battery performance.

[0367] In some specific embodiments of the present application, reference is made to Figure 4 and Fig. 22 As shown, the battery assembly 200 may also have a fifth group of battery cells 206, and the multiple 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 are arranged adjacent to the third group of battery cells 204, wherein 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 outside of the battery assembly 200 in the first direction.

[0368] The fifth battery cell group 206 is arranged adjacent to the third battery cell group 204 . Since the third battery cell group 204 is a peripheral battery cell, the fifth battery cell group 206 can be arranged on a side of the third battery cell group 204 away from the side wall of the battery 1000 in the first direction. When the heat exchange component 100 is arranged with the battery assembly 200, the fourth heat exchange portion 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 portion 125 can be arranged on the side of the third heat exchange section 13 that is away from the side wall of the battery 1000. The fourth heat exchange portion 125 can cooperate with the third heat exchange section 13 to fit the third group of battery cells 204. The fourth heat exchange portion 125 can also fit the third group of battery cells 204 while the third heat exchange section 13 fits the fifth group of battery cells 206. The fourth heat exchange portion 125 can also be arranged between the side wall of the battery 1000 and the third group of battery cells 204, and the third heat exchange section 13 fits the third group of battery cells 204.

[0369] 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 element 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 fits with the third group of battery cells 204 and the third heat exchange section 13 fits 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 element 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 the heat exchange fluid in the heat exchange element 100.

[0370] In other specific 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.

[0371] Specifically, the third heat exchange section 13 and the fourth heat exchange section 125 both extend along the 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 fitted together to enable heat exchange, and the fourth heat exchange section 125 and the third group of battery cells 204 are fitted together to enable heat exchange, and the temperature difference caused by the water temperature difference at the edge of the battery assembly 200 can also be balanced.

[0372] 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 portion 125 is arranged on the outside of the battery assembly 200 in the first direction.

[0373] That is to say, the fourth heat exchange part 125 does not exchange heat with the battery assembly 200, and the third heat exchange part 122 extends in the third direction and exchanges heat with the third group of battery cells 204. 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.

[0374] In the above embodiment, by setting the third heat exchange section 13 and the fourth heat exchange part 125 to be in close 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 close contact with the third group of battery cells 204 for heat exchange, and the fourth heat exchange part 125 is arranged on the outside 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.

[0375] According to some embodiments of the present application, Figure 4 As shown, the third heat exchange segment 13 extends along the third direction to a position close to one of the plurality of first heat exchange parts 111 which is farthest from the second heat exchange part 121 .

[0376] In the above embodiment, by setting the third heat exchange section 13 to extend along the third direction to a position close to one of the multiple first heat exchange parts 111 that is farthest from the second heat exchange part 121, the length of the third heat exchange part 122 can be increased, the heat exchange area of ​​the third heat exchange part 122 can be increased, and the heat exchange effect of the first heat exchange channel 10 can be improved.

[0377] In some specific embodiments of the present application, Figure 4 As shown, the first heat exchange channel 10 may further include: a fourth bending portion 14 , which is arc-shaped and bent and connected between the third heat exchange section 13 and the first heat exchange portion 111 .

[0378] Among them, the fourth bend 14 is arc-shaped, that is, the fourth bend 14 extends along the arc, and the fluid flow directions at both ends of the fourth bend 14 have a certain angle, so that the fourth bend 14 can change the flow direction of the fluid, and then the third heat exchange section 13 can extend along a preset direction. At the same time, the arc-shaped flow channel structure 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.

[0379] In addition, by setting the fourth bend 14, the circuitous arrangement of the first heat exchange channel 10 can also be achieved. In this way, the heat exchange area of ​​the first heat exchange channel 10 can be increased and the structure can be more compact, which is more conducive to the miniaturization design of the battery 1000 and improves the volume energy density of the battery 1000.

[0380] In the above embodiment, by setting 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.

[0381] In some specific examples of this application, reference Figure 4 As shown, the fourth bending portion 14 may be in the shape of a quarter arc.

[0382] That is, the fourth bend 14 can extend along a semicircular arc line, specifically, the fourth bend 14 can extend along a quarter arc line protruding toward the connection position of the second heat exchange part 121 and the fourth heat exchange part 125. The angle between the inlet and the outlet of the fourth bend 14 is 90°. The fourth bend 14 is similar to a 90° elbow in a 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 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.

[0383] Furthermore, the fourth bending portion 14 connects the third heat exchange section 13 and the first heat exchange section 111, so that the third heat exchange section 13 and the first heat exchange section 111 can be arranged perpendicular to each other, wherein the first heat exchange section 111 extends along the first direction, and the third heat exchange section 13 extends along the third direction, and the first direction is perpendicular to the third direction. In this way, the layout of the first heat exchange channel 10 can be more regular, and the first heat exchange channel 10 can be more closely fitted to the layout of the battery assembly 200, thereby increasing the heat exchange effect of the first heat exchange channel on the battery assembly 200.

[0384] In other embodiments, the bending degree of the fourth bending portion 14 can be adjusted according to needs, for example, it can be 50°, 80°, 120°, 135°, 150°, etc., which is not limited to the embodiments of the present application.

[0385] In the above embodiment, by setting the fourth bending portion 14 to be a quarter arc shape, the flow direction of the fluid can be changed from the original flow direction to a direction perpendicular to the original flow direction after passing through the fourth bending portion 14; at the same time, the arc shape can also reduce the resistance to the fluid flow, so that the fluid can flow smoothly in the fourth bending portion 14, effectively preventing the fluid from flowing too slowly and causing a decrease in heat exchange efficiency.

[0386] In a specific embodiment of the present application, reference Figure 4 As shown, the first heat exchange channel 10 may further include: a first inlet and outlet section 15 and a second inlet and outlet section 17, one end of the first inlet and outlet section 15 is connected to the third heat exchange section 13 at an angle, and the other end of the first inlet and outlet section 15 forms a first inlet and outlet of the first heat exchange channel 10. One end of the second inlet and outlet section 17 is connected to the fourth heat exchange portion 125 at an angle, and the other end of the second inlet and outlet section 17 forms a second inlet and outlet of the first heat exchange channel 10, and one of the first inlet and outlet and the second inlet and outlet is an inlet of the first heat exchange channel 10 and the other is an outlet.

[0387] Among them, one end of the first entrance and exit section 15 is connected to the third heat exchange section 13 at an angle. For example, the first entrance and exit section 15 can be connected to the third heat exchange section 13 at an acute angle, an obtuse angle, a right angle or a flat angle. Specifically, the first entrance and exit section 15 is connected to the third heat exchange section 13 and is arranged at an angle greater than 0° and less than or equal to 180°. The angle between the first entrance and exit section 15 and the third heat exchange section 13 is 30°, 45°, 60°, 90°, 120°, 135° or 150°, etc. Similarly, the second inlet and outlet section 17 can be connected to the fourth heat exchange part 125 at an acute angle, an obtuse angle, a right angle or a flat angle. Specifically, the first inlet and outlet section 15 is connected to the fourth heat exchange part 125 and is arranged at an angle greater than 0° and less than or equal to 180°. The angle between the first inlet and outlet section 1515 and the fourth heat exchange part 125 is 30°, 45°, 60°, 90°, 120°, 135° or 150°, etc. The angle between the first inlet and outlet section 15 and the third heat exchange section 13 and the angle between the second inlet and outlet section 17 and the fourth heat exchange part 125 can be set and adjusted according to the arrangement requirements.

[0388] When the heat exchange tube exchanges heat with the battery assembly 200, the heat exchange fluid can flow from the first inlet and outlet section 15 into the third heat exchange section 13 and then flow in the first heat exchange channel 10, or the heat exchange fluid can flow from the third heat exchange section 13 to the first inlet and outlet section 15 and out of the first heat exchange channel 10 from the first inlet and outlet, the heat exchange fluid can also flow from the second inlet and outlet section 17 into the fourth heat exchange part 125 and then flow in the first heat exchange channel 10, or the heat exchange fluid can flow from the fourth heat exchange part 125 to the second inlet and outlet section 17 and out of the second inlet and outlet. The inflow and outflow directions of the heat exchange fluid in the first heat exchange channel 10 can be adjusted or set accordingly according to the heat exchange needs.

[0389] In the above embodiment, by setting the first inlet and outlet section 15 and the second inlet and outlet section 17, it is convenient to externally pipe the heat exchange fluid to enter or be discharged from the first inlet and outlet section 15 or the second inlet and outlet section 17 to the first heat exchange channel 10, and it is convenient for the heat exchange element 100 to adjust the flow direction of the heat exchange fluid in the first heat exchange channel 10 as needed. The first inlet and outlet section 15 and the second inlet and outlet section 17 have simple structures and are easy to use.

[0390] In a specific example of this application, reference Figure 4 As shown, the first inlet and outlet section 15 may extend along a first direction away from the first heat exchange section 11 , and the third heat exchange section 13 may extend along a third direction.

[0391] It is understandable that a certain angle is formed between the first entrance and exit section 15 and the third heat exchange section 13 , thereby a certain space is formed on the side of the third heat exchange section 13 facing the first entrance and exit section 15 , which can be beneficial to the layout of other components in the battery 1000 .

[0392] In the above embodiment, by setting the first inlet and outlet section 15 to extend along the first direction away from the first heat exchange section 11, the pipeline arrangement of the first heat exchange channel 10 can be more rationalized and convenient for connection with external pipelines; at the same time, the first inlet and outlet can be kept away from the battery assembly 200, which is beneficial to reduce the possibility of damage to the battery assembly 200 due to water leakage from the first inlet and outlet.

[0393] Furthermore, if Figure 4 As shown, the first heat exchange channel 10 may further include: a fifth bending portion 16 , which is arc-shaped and bent and connected between the third heat exchange section 13 and the first inlet and outlet section 15 .

[0394] Among them, the fifth bend 16 is arc-shaped, that is, the fifth bend 16 extends along the arc line, and the fluid flow directions at both ends of the fifth bend 16 have a certain angle, thereby, the third heat exchange section 13 and the first inlet and outlet section 15 can be connected, so that the heat exchange fluid can flow smoothly from the third heat exchange section 13 to the first inlet and outlet section 15 or from the first inlet and outlet section 15 to the third heat exchange section 13, thereby realizing the liquid inlet or liquid outlet of the first inlet and outlet section 15; at the same time, the arc shape 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.

[0395] In the above embodiment, by setting the fifth bend 16, the heat exchange fluid can flow smoothly from the third heat exchange section 13 to the first inlet and outlet section 15 or from the first inlet and outlet section 15 to the third heat exchange section 13, thereby realizing the liquid inlet or liquid outlet of the first inlet and outlet section 15; at the same time, the arc-shaped 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.

[0396] Furthermore, refer to Figure 4 As shown, the fifth bending portion 16 may be in an arc shape, and the central angle corresponding to the fifth bending portion 16 is greater than or equal to 90° and less than 180°.

[0397] For example, the central angle corresponding to the fifth bending portion 16 may be 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, etc.

[0398] like Figure 4As shown, the heat exchanger 100 includes two first heat exchange channels 10, and the fifth bend 16 of the first heat exchange channel 10 located on the side of the battery assembly 200 facing the coordinate origin in the Y direction is in a quarter arc shape, and the third heat exchange section 13 is arranged vertically with the first inlet and outlet section 15. At the same time, the first inlet and outlet section 15 of the first heat exchange channel 10 located on the lower side may include a first extension section and a second extension section, and the first extension section is connected between the second extension section and the third heat exchange section 13, wherein 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, and the first extension section is connected to the third heat exchange section 13 through the fifth bend 16, and the central angle corresponding to the arc line of the fifth bend 16 is greater than 90° and less than 135°.

[0399] In the above embodiment, by setting the fifth bend 16 to be an arc shape, the resistance to fluid flow can be further reduced, so that the fluid can flow smoothly in the fifth bend 16, and the heat exchange efficiency can be effectively prevented from being reduced due to the fluid flowing too slowly; at the same time, the central angle corresponding to the fifth bend 16 is greater than or equal to 90° and less than 180°, and a certain space can be formed on the side of the third heat exchange section 13 toward the first entrance and exit section 15, which can be beneficial to the arrangement of other components in the battery 1000 and improve the rationality of the layout of the battery 1000.

[0400] Furthermore, if Figure 4 As shown, the second heat exchange section 12 may further include: a sixth bending portion 126 , which may be in an arc shape, and the sixth bending portion 126 is connected between the fourth heat exchange portion 125 and the second heat exchange portion 121 .

[0401] Among them, the sixth bending portion 126 is formed in an arc shape, that is, the sixth bending portion 126 extends along the arc line, and the fluid flow directions at both ends of the sixth bending portion 126 have a certain angle, thereby, the sixth bending portion 126 can change the flow direction of the heat exchange fluid, and then the second heat exchange portion 121 and the fourth heat exchange portion 125 can be extended along a preset direction. At the same time, the arc-shaped sixth bending portion 126 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.

[0402] In the above embodiment, by setting the sixth bend 126, the flow direction of the fluid in the first heat exchange channel 10 can be changed, and the circuitous arrangement of the first heat exchange channel 10 can be realized, thereby increasing the heat exchange area of ​​the first heat exchange channel 10 and improving the heat exchange efficiency of the first heat exchange channel 10; at the same time, the sixth bend 126 is arc-shaped, which 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.

[0403] In addition, by setting the sixth bend 126, the second heat exchange section 12 can form a U-shaped area 120, so that the second heat exchange section 12 surrounds the first heat exchange section 11, thereby increasing the compactness of the arrangement of the first heat exchange channel 10 and achieving structural miniaturization of the first heat exchange channel 10, which is beneficial to improving the volume energy density of the battery.

[0404] Furthermore, refer to Figure 4 As shown, the sixth bending portion 126 may be in the shape of a quarter arc.

[0405] That is to say, the sixth bend 126 can extend along a semicircular arc line, specifically, the sixth bend 126 can extend along a quarter-circular arc line that is protruding away from the first heat exchange section 11. The angle between the inlet and the outlet of the sixth bend 126 is 90°. The sixth bend 126 is similar to a 90° elbow in a pipe material, which can change the direction of the flow channel so that the fluid flow direction changes by 90° after passing through the sixth bend 126. For example, the flow direction of the liquid can be changed from the X direction to the Y direction, or from the Y direction to the X direction. Among them, the sixth bend 126 connects the second heat exchange section 121 and the fourth heat exchange section 125. At this time, the second heat exchange section 121 and the fourth heat exchange section 125 are arranged vertically. In this way, the layout of the second heat exchange section 12 can be made more regular, and the second heat exchange section 12 can be more in line with 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.

[0406] In other embodiments, the bending degree of the sixth bending portion 126 can be adjusted according to needs, for example, it can be 50°, 80°, 120°, 135°, 150°, etc., which is not limited to the embodiments of the present application.

[0407] In the above embodiment, by setting the sixth bending portion 126 to be a quarter arc shape, the flow direction of the fluid can be changed from the original flow direction to a direction perpendicular to the original flow direction after passing through the sixth bending portion 126; at the same time, the arc shape can further reduce the resistance to the fluid flow, so that the fluid can flow smoothly in the sixth bending portion 126, effectively preventing the fluid from flowing too slowly and causing a decrease in heat exchange efficiency.

[0408] In a specific example of this application, Figure 4 As shown, the second inlet and outlet section 17 extends along the first direction away from the first heat exchange section 11, and the fourth heat exchange portion 125 extends along the third direction.

[0409] It is understandable that a certain angle is formed between the second entrance and exit section 17 and the fourth heat exchange part 125 , thereby a certain space is formed on the side of the fourth heat exchange part 125 facing the second entrance and exit section 17 , which can be beneficial to the layout of other components in the battery 1000 .

[0410] In the above embodiment, by setting the second inlet and outlet section 17 to extend along the first direction away from the first heat exchange section 11, the pipeline arrangement of the first heat exchange channel 10 can be more rationalized and convenient for connection with external pipelines; at the same time, the second inlet and outlet can be made away from the battery assembly 200, which is beneficial to reduce the possibility of damage to the battery assembly 200 due to water leakage at the second inlet and outlet.

[0411] Furthermore, if Figure 4 As shown, the first heat exchange channel 10 may further include: a seventh bending portion 18 , which is arc-shaped and bent and connected between the fourth heat exchange portion 125 and the second inlet and outlet section 17 .

[0412] Among them, the seventh bending portion 18 is arc-shaped, that is, the seventh bending portion 18 has a certain angle, thereby, the seventh bending portion 18 is bent and connected between the fourth heat exchange portion 125 and the second inlet and outlet section 17, which can realize the connection between the fourth heat exchange portion 125 and the second inlet and outlet section 17, so that the heat exchange fluid can flow smoothly from the fourth heat exchange portion 125 to the second inlet and outlet section 17 or from the second inlet and outlet section 17 to the fourth heat exchange portion 125, realizing the liquid inlet or liquid outlet of the second inlet and outlet section 17; at the same time, the arc-shaped flow channel structure 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.

[0413] In the above embodiment, by setting the seventh bend portion, the heat exchange fluid can flow smoothly from the fourth heat exchange portion 125 to the second inlet and outlet section 17 or from the second inlet and outlet section 17 to the fourth heat exchange portion 125, thereby realizing the liquid inlet or liquid outlet of the second inlet and outlet section 17; at the same time, the arc-shaped seventh bend portion 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.

[0414] Furthermore, if Figure 4 As shown, the seventh bending portion 18 is in an arc shape, and the central angle corresponding to the seventh bending portion 18 is greater than or equal to 90° and less than 180°.

[0415] For example, the central angle corresponding to the seventh bending portion 18 can be 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160° or 170°, etc.

[0416] like Figure 4As shown, the heat exchanger 100 includes two first heat exchange channels 10, and the seventh bend 18 of the first heat exchange channel 10 located on the side of the battery assembly 200 facing the coordinate origin in the Y direction is in a quarter arc shape, and the fourth heat exchange portion 125 is arranged vertically with the second inlet and outlet section 17. At the same time, the second inlet and outlet section 17 of the first heat exchange channel 10 located on the lower side includes a third extension section and a fourth extension section, and the third extension section is connected between the fourth extension section and the fourth heat exchange portion 125, wherein 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, and the third extension section is connected to the fourth heat exchange portion 125 through the seventh bend 18, and the central angle corresponding to the arc line of the seventh bend 18 is greater than 90° and less than 135°.

[0417] In the above embodiment, by setting the seventh bend 18 to be an arc shape, the resistance to fluid flow can be further reduced, so that the fluid can flow smoothly in the seventh bend 18, and the heat exchange efficiency can be effectively prevented from being reduced due to the fluid flowing too slowly; at the same time, the central angle corresponding to the seventh bend 18 is greater than or equal to 90° and less than 180°, and an avoidance space can be formed on the side of the fourth heat exchange section 125 toward the second entrance and exit section 17, which can be beneficial to the layout of other components in the battery 1000 and improve the rationality of the layout of the battery 1000.

[0418] In some examples of this application, reference Figure 4 and Figure 5 As shown, the first heat exchange section 11 may include a plurality of first heat exchange parts 111, the plurality of first heat exchange parts 111 are arranged at intervals and are connected by bending in sequence, the plurality of first heat exchange parts 111 and the second heat exchange parts 121 extend along the first direction and are arranged at intervals in the third direction, a battery cell 201 is fitted with 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 fitted with at least two first heat exchange parts 111 to enable heat exchange.

[0419] Among them, multiple first heat exchange parts 111 are arranged in the first heat exchange section 11, for example, two, three, four, five, six, etc. first heat exchange parts 111 can be arranged, the multiple first heat exchange parts 111 can extend linearly 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 and the first heat exchange parts 111 can be arranged in parallel and 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, and the battery unit 201 can also be attached to two or more first heat exchange parts 111.

[0420] Among them, a battery unit 201 is provided to be fitted with a second heat exchange part 121 and at least one first heat exchange part 111, or a battery unit 201 is fitted with at least two first heat exchange parts 111, so that the heat exchange element 100 can more conveniently meet the heat exchange area requirements of each battery cell 2011 in the battery unit 201, and the first heat exchange part 111 and the second heat exchange part 121 both extend along the first direction and are arranged at intervals in the third direction, so that the heat exchange element 100 can be arranged more conveniently in the battery 1000, and the overall structure of the first heat exchange section 11 and the second heat exchange section 12 in the first heat exchange channel 10 can be arranged more compactly.

[0421] In some embodiments of the present application, the total number of the first heat exchange parts 111 and the second heat exchange parts 121 of the first heat exchange channel 10 is greater than or equal to 4.

[0422] For example, the total number of the first heat exchange parts 111 and the second heat exchange parts 121 of the first heat exchange channel 10 may be 4, 5, 6, 7 or more.

[0423] In the above embodiment, by setting the total number of the first heat exchange part 111 and the second heat exchange part 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 element 100 can be improved.

[0424] In one example of this application, Figure 4 As shown, the number of the first heat exchange channels 10 can be two, each of the first heat exchange channels 10 includes: three first heat exchange parts 111, one second heat exchange part 121, one third heat exchange part 122, one fourth heat exchange part 125 and one third heat exchange section 13, the number of the battery cells 201 is four, the battery cell 201 at the end in the third direction is attached to one first heat exchange part 111 and one second heat exchange part 121 to enable heat exchange, and any of the remaining battery cells 201 is attached to two first heat exchange parts 111 to enable exchange, the battery assembly 200 also has a fifth group of battery cells 206, The multiple 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 are arranged adjacent to the third group of battery cells 204. The third heat exchange unit 122 is connected to the second heat exchange unit 121 and the first heat exchange unit 111 which is farthest from the second heat exchange unit 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 unit 111 which is closest to the second heat exchange unit 121, and is attached to the fifth group of battery cells 206 to enable heat exchange. The fourth heat exchange unit 125 is attached to the third group of battery cells 204 to enable heat exchange.

[0425] Among them, two first heat exchange channels 10 are provided, and the two first heat exchange channels 10 can be arranged at intervals in the third direction, each heat exchange channel can be attached to two battery cells 201 for heat exchange, and the two first heat exchange channels 10 can be arranged symmetrically in the third direction. The battery assembly 200 is provided with four battery cells 201, and the four battery cells 201 can extend along the first direction and be arranged in sequence in the third direction. Specifically, the number of battery cells 2011 in each battery cell 201 can be 30, and the multiple battery cells 2011 in the battery cell 201 can be stacked and arranged along the third direction. The thickness direction of the battery cells 2011 is the same as the third direction. Among them, the battery cell 201 close to the side wall of the battery 1000 in the third direction can be formed into a first group of battery cells 202 in the peripheral battery cells of the battery assembly 200, and among the two battery cells 201 arranged sequentially along the third direction, the four battery cells 2011 close to the side wall of the battery 1000 in the first direction can be respectively formed into a second group of battery cells 203 and a third group of battery cells 204 in the peripheral battery cells, and the fifth group of battery cells 206 are arranged along the third direction and are located on the side of the third group of battery cells 204 facing the second group of battery cells 203 in the first direction.

[0426] The first heat exchange section 11 is provided with three first heat exchange parts 111, which extend along the first direction and are arranged at intervals in the third direction, wherein two first heat exchange parts 111 arranged in sequence at intervals in the third direction are bonded to the battery unit 201 close to the first group of battery cells 202 in the third direction, and another first heat exchange part 111 is bonded to 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 bonded to the first group of battery cells 202, the third heat exchange part 122 extends along the third direction and is bonded to the second group of battery cells 203, the third heat exchange section 13 extends along the 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 bonded to the fifth group of battery cells 206, and the fourth heat exchange part 125 is bonded to the third group of battery cells 204.

[0427] In the above embodiment, two first heat exchange channels 10 are provided to exchange heat with the battery assembly 200, which has a simple structure and convenient arrangement, and can improve the heat exchange efficiency of the heat exchange element 100 to a certain extent, so that the heat exchange element 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 parts 111, a second heat exchange part 121, a third heat exchange part 122, a fourth heat exchange part 125 and a third heat exchange section 13, so that the first heat exchange channel 10 and the two battery units 201 have sufficient heat exchange area to meet the heat exchange needs and improve the heat exchange rate.

[0428] The first heat exchange section 11, the second heat exchange section 12 and the third heat exchange section 13 in the first heat exchange channel 10 are arranged as above, so that when the heat exchange element 100 is performing heat exchange operation, the heat exchange element 100 can cooperate well with the heat exchange conditions of the battery cells 2011 at different positions in the battery 1000, so that the battery cells 2011 at different positions of the battery assembly 200 can obtain a more uniform and consistent heat exchange effect, so that during the heat exchange operation of the battery 1000, the temperature distribution in the battery 1000 is more uniform, and the battery 1000 can operate more stably and maintain good battery performance.

[0429] In one example of this application, Figure 5 As shown, the number of the first heat exchange channels 10 can be two, and each of the first heat exchange channels 10 can include: five first heat exchange parts 111, one second heat exchange part 121, one third heat exchange part 122, one fourth heat exchange part 125 and one third heat exchange section 13. The number of battery cells 201 is four, and the battery cell 201 at the end in the third direction is attached to the two first heat exchange parts 111 and the one second heat exchange part 121 to enable heat exchange, and any of the remaining battery cells 201 is attached to the three first heat exchange parts 111 to enable heat exchange, and the battery assembly 200 also has a fifth group of battery cells 20 6. The multiple 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 are arranged adjacent to the third group of battery cells 204. The third heat exchange unit 122 connects the second heat exchange unit 121 and the first heat exchange unit 111 farthest from the second heat exchange unit 121, and fits with the second group of battery cells 203 to enable heat exchange. The third heat exchange section 13 connects the first heat exchange unit 111 closest to the second heat exchange unit 121, and fits with the fifth group of battery cells 206 to enable heat exchange. The fourth heat exchange unit 125 fits with the third group of battery cells 204 to enable heat exchange.

[0430] Among them, two first heat exchange channels 10 are provided, and the two first heat exchange channels 10 can be arranged at intervals in the third direction, each heat exchange channel can be attached to two battery cells 201 for heat exchange, and the two first heat exchange channels 10 can be arranged symmetrically in the third direction. The battery assembly 200 is provided with four battery cells 201, and the four battery cells 201 can extend along the first direction and be arranged in sequence in the third direction. Specifically, the number of battery cells 2011 in each battery cell 201 can be 30, and the multiple battery cells 2011 in the battery cell 201 can be arranged in a stacked manner along the first direction, and the thickness direction of the battery cells 2011 is the same as the first direction. Among them, the battery cell 201 close to the side wall of the battery 1000 in the third direction can be formed into a first group of battery cells 202 in the peripheral battery cells of the battery assembly 200, and among the two battery cells 201 arranged sequentially along the third direction, the four battery cells 2011 close to the side wall of the battery 1000 in the first direction can be respectively formed into a second group of battery cells 203 and a third group of battery cells 204 in the peripheral battery cells, and the fifth group of battery cells 206 are arranged along the third direction and are located on the side of the third group of battery cells 204 facing the second group of battery cells 203 in the first direction.

[0431] The first heat exchange section 11 is provided with five first heat exchange parts 111, which extend along the first direction and are arranged at intervals in the third direction, wherein three first heat exchange parts 111 arranged in sequence at intervals in the third direction are bonded to the battery cells 201 close to the first group of battery cells 202 in the third direction, and the other two first heat exchange parts 111 can be bonded to 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 bonded to the first group of battery cells 202, the third heat exchange part 122 extends along the third direction and is bonded to the second group of battery cells 203, the third heat exchange section 13 extends along the 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 bonded to the fifth group of battery cells 206, and the fourth heat exchange part 125 is bonded to the third group of battery cells 204.

[0432] In the above embodiment, two first heat exchange channels 10 are provided to exchange heat with the battery assembly 200, which has a simple structure and convenient arrangement, and can improve the heat exchange efficiency of the heat exchange element 100 to a certain extent, so that the heat exchange element 100 can better exchange heat with the battery assembly 200. Five first heat exchange parts 111, one second heat exchange part 121, one third heat exchange part 122, one fourth heat exchange part 125 and one third heat exchange section 13 are provided in the first heat exchange channel 10, so that the first heat exchange channel 10 and the two battery units 201 have sufficient heat exchange area to meet the heat exchange needs and improve the heat exchange rate.

[0433] The first heat exchange section 11, the second heat exchange section 12 and the third heat exchange section 13 in the first heat exchange channel 10 are arranged as above, so that when the heat exchange element 100 is performing heat exchange operation, the heat exchange element 100 can cooperate well with the heat exchange conditions of the battery cells 2011 at different positions in the battery 1000, so that the battery cells 2011 at different positions of the battery assembly 200 can obtain a relatively uniform and consistent heat exchange effect, thereby making the temperature distribution in the battery 1000 more uniform during the heat exchange operation, so that the battery 1000 can operate more stably and maintain good battery performance.

[0434] In one example of the present application, reference Fig.26 As shown, the number of the first heat exchange channels 10 can be two, and each of the first heat exchange channels 10 can include: five first heat exchange parts 111, one second heat exchange part 121, one third heat exchange part 122, one fourth heat exchange part 125 and one third heat exchange section 13. The number of battery cells 201 is six, and the battery cell 201 at the end in the third direction is attached to one first heat exchange part 111 and one second heat exchange part 121 to enable heat exchange, and any of the remaining battery cells 201 is attached to two first heat exchange parts 111 to enable heat exchange, and the battery assembly 200 also has a fifth group of battery cells 20 6. The multiple 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 are arranged adjacent to the third group of battery cells 204. The third heat exchange unit 122 connects the second heat exchange unit 121 and the first heat exchange unit 111 farthest from the second heat exchange unit 121, and is attached to the second group of battery cells 203 to enable heat exchange. The third heat exchange section 13 connects the first heat exchange unit 111 closest to the second heat exchange unit 121, and is attached to the fifth group of battery cells 206 to enable heat exchange. The fourth heat exchange unit 125 is attached to the third group of battery cells 204 to enable heat exchange.

[0435] Among them, two first heat exchange channels 10 are provided, and the two first heat exchange channels 10 can be arranged at intervals in the third direction, each heat exchange channel can be attached to two battery cells 201 for heat exchange, and the two first heat exchange channels 10 can be arranged symmetrically in the third direction. The battery assembly 200 is provided with four battery cells 201, and the four battery cells 201 can extend along the first direction and be arranged in sequence in the third direction. Specifically, the number of battery cells 2011 in each battery cell 201 can be 30, and the multiple battery cells 2011 in the battery cell 201 can be arranged in a stacked manner along the first direction, and the thickness direction of the battery cells 2011 is the same as the first direction. Among them, the battery cell 201 close to the side wall of the battery 1000 in the third direction can be formed into a first group of battery cells 202 in the peripheral battery cells of the battery assembly 200, and among the two battery cells 201 arranged sequentially along the third direction, the four battery cells 2011 close to the side wall of the battery 1000 in the first direction can be respectively formed into a second group of battery cells 203 and a third group of battery cells 204 in the peripheral battery cells, and the fifth group of battery cells 206 are arranged along the third direction and are located on the side of the third group of battery cells 204 facing the second group of battery cells 203 in the first direction.

[0436] The first heat exchange section 11 is provided with five first heat exchange parts 111, which extend along the first direction and are arranged at intervals in the third direction, wherein three first heat exchange parts 111 arranged in sequence at intervals in the third direction are bonded to the battery cells 201 close to the first group of battery cells 202 in the third direction, and the other two first heat exchange parts 111 can be bonded to 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 bonded to the first group of battery cells 202, the third heat exchange part 122 extends along the third direction and is bonded to the second group of battery cells 203, the third heat exchange section 13 extends along the 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 bonded to the fifth group of battery cells 206, and the fourth heat exchange part 125 is bonded to the third group of battery cells 204.

[0437] In the above embodiment, two first heat exchange channels 10 are provided to exchange heat with the battery assembly 200, which has a simple structure and convenient arrangement, and can improve the heat exchange efficiency of the heat exchange element 100 to a certain extent, so that the heat exchange element 100 can better exchange heat with the battery assembly 200. Five first heat exchange parts 111, one second heat exchange part 121, one third heat exchange part 122, one fourth heat exchange part 125 and one third heat exchange section 13 are provided in the first heat exchange channel 10, so that the first heat exchange channel 10 and the two battery units 201 have sufficient heat exchange area to meet the heat exchange needs and improve the heat exchange rate.

[0438] The first heat exchange section 11, the second heat exchange section 12 and the third heat exchange section 13 in the first heat exchange channel 10 are arranged as above, so that when the heat exchange element 100 is performing a heat exchange operation, the heat exchange element 100 can cooperate well with the heat exchange conditions of the battery cells 2011 at different positions in the battery 1000, so that the battery cells 2011 at different positions of the battery assembly 200 can obtain a relatively uniform and consistent heat exchange effect, thereby making the temperature distribution in the battery 1000 more uniform during the heat exchange operation, so that the battery 1000 can operate more stably and maintain good performance.

[0439] According to some embodiments of the present application, the number of battery cells 201 may be 2 to 8.

[0440] For example, the number of battery cells 201 may be 2, 3, 4, 5, 6, 7 or 8.

[0441] In the above embodiment, by setting the number of battery cells 201 to 2 to 8, it is beneficial to the overall design of the battery 1000 and the heat exchanger 100, reducing the difficulty of producing the heat exchanger 100 and the battery 1000, and at the same time, it can also increase the scope of application of the battery 1000 and improve the market competitiveness of the battery 1000.

[0442] In one example of this application, reference Figure 4 As shown, the number of battery cells 2011 in each battery unit 201 may be 30.

[0443] Reference Figure 4 As shown, 30 battery cells 2011 may be provided in each of the four battery units 201 in the figure.

[0444] In the above embodiment, 30 battery cells 2011 are arranged in each battery unit 201 , which can better meet the use requirements of the battery 1000 .

[0445] In one embodiment of the present application, reference Figure 4 As shown, the first heat exchange section 11 may be connected downstream of the second heat exchange section 12 along the fluid flow direction.

[0446] That is to say, the heat exchange fluid first flows through the second heat exchange section 12 and then flows into the first heat exchange section 11, wherein the second heat exchange section 12 is arranged around the circumference of the first heat exchange section 11. When the first heat exchange channel 10 exchanges heat with the battery assembly 200, the peripheral temperature of the battery assembly 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, so that the first heat exchange channel 10 can preferentially exchange heat with the outer circumference of the battery assembly 200, which is beneficial to improve the temperature difference between the inside and outside of the battery assembly 200, thereby improving the service life of the battery 1000 to a certain extent.

[0447] In the above embodiment, by setting the first heat exchange section 11 to be connected to the 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 circumference of the battery 1000, which is beneficial to improve the temperature difference of the battery 1000 in different environments and increase the service life of the battery 1000 to a certain extent.

[0448] The heat exchange element 100 is configured as follows: when heating the battery assembly 200 of the battery 1000, the first heat exchange section 11 is connected to the downstream of the second heat exchange section 12 along the fluid flow direction; when cooling the battery assembly 200 of the battery 1000, the first heat exchange section 11 is connected to the upstream of the second heat exchange section 12 along the fluid flow direction.

[0449] Specifically, when heating the battery assembly 200 of the battery 1000, the temperature of the heat exchange fluid flowing in the heat exchange element 100 is higher than the operating temperature of the battery 1000. The heat exchange element 100 heats the battery assembly 200, and 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.

[0450] Since the high-temperature fluid first enters the second heat exchange section 12 located at the periphery of the first heat exchange channel 10, the second heat exchange section 12 can first heat the battery cells 2011 at the periphery of the battery assembly 200, and the heat exchange fluid enters the first heat exchange section 11 and then cools the battery cells 2011 at the middle of the battery assembly 200. Since the battery cells 2011 at the periphery of the battery 1000 dissipate more heat to the external environment, the temperature of the battery cells 2011 at the periphery of the battery 1000 drops more, and the heat exchange fluid first heats the battery cells 2011 at the periphery of the battery 1000. The higher temperature heat exchange fluid can increase the temperature of the battery cells 2011 at the periphery while compensating for the heat lost by the battery cells 2011 due to heat dissipation to the external environment, thereby meeting their heating needs.

[0451] The battery cells 2011 in the middle of the battery assembly 200 have a small contact area with the external environment and less heat loss. The lower temperature heat exchange fluid flowing in the first heat exchange section 11 can cooperate with the heat generated by the battery cells 2011 themselves to meet their heating needs. As a result, the heating effects obtained by the battery cells 2011 at the periphery of the battery assembly 200 and the battery cells 2011 at the middle of the battery assembly 200 are basically the same, and the temperatures of the battery cells 2011 at the periphery of the battery assembly 200 and the battery cells 2011 at the middle of the battery assembly 200 after heating are relatively consistent, making the temperature distribution in the battery 1000 more uniform.

[0452] When cooling the battery assembly 200 of the battery 1000, the temperature of the heat exchange fluid flowing in the heat exchange element 100 is lower than the operating temperature of the battery 1000. The heat exchange element 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.

[0453] When the battery 1000 is cooled, 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 portion of the battery assembly 200 to the edge portion of the battery assembly 200 and exchanges heat. Among them, 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 heat exchange fluid with a lower temperature in the first heat exchange section 11 can better meet the heat dissipation requirements of the battery cells 2011 at the middle part of the battery 1000. At the same time, since the battery cells 2011 at the periphery of the battery assembly 200 can directly dissipate heat naturally toward the external environment, 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 requirements of the peripheral battery cells 2011, so that the cooling effects obtained by the battery cells 2011 at the periphery of the battery 1000 and the battery cells 2011 at the middle part of the battery 1000 are roughly the same, and then the temperatures of the battery cells 2011 at the periphery of the battery 1000 and the battery cells 2011 at the middle part of the battery 1000 after cooling and heat dissipation are relatively consistent, thereby reducing the temperature difference between the inside and outside of the battery assembly 200 and making the temperature distribution in the battery 1000 more uniform.

[0454] In the above embodiment, the heat exchange element 100 is configured as follows: when heating the battery assembly 200 of the battery 1000, the first heat exchange section 11 is connected to the downstream of the second heat exchange section 12 along the fluid flow direction; when cooling the battery assembly 200 of the battery 1000, the first heat exchange section 11 is connected to the upstream of the second heat exchange section 12 along the fluid flow direction, which can further enhance the heat exchange effect on the battery 1000 and improve the temperature uniformity of the battery assembly 200.

[0455] In some examples of this application, reference Figure 4 and Figure 8-Figure 13 As shown, the number of heat exchange tubes can be one or more, and the inner side of each heat exchange tube defines a heat exchange 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 channel of at least one heat exchange tube is formed as a first heat exchange channel 10.

[0456] Among them, the number of heat exchange tubes is set to one or more. When the number of heat exchange tubes is multiple, the heat exchange tubes can be provided with two, three, four, etc., and the multiple heat exchange tubes are limited to form multiple heat exchange channels. Among the multiple heat exchange channels, one heat exchange channel, part of the heat exchange channels, or all of the heat exchange channels can be formed as the first heat exchange channel 10. The multiple heat exchange tubes can be arranged at intervals in the third direction, and the multiple heat exchange tubes can also 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 parts 111 in the first heat exchange channel 10 can be arranged in a staggered manner in the first direction with the multiple first heat exchange parts 111 in other first heat exchange channels 10, or the second heat exchange part 121 in the first heat exchange channel 10 can be arranged adjacent to the second heat exchange part 121 or the third heat exchange part 122 in other first heat exchange channels 10, and other forms of winding arrangement are not listed here one by one.

[0457] For example Fig.12 As shown, the heat exchange element 100 has two heat exchange channels arranged in parallel, and the two heat exchange channels are arranged around each other. Further, the two heat exchange channels can both be formed into the first heat exchange channel 10. Fig.13 As shown, the heat exchange element 100 has three heat exchange channels arranged in parallel, and the three heat exchange channels are arranged around each other.

[0458] In the above embodiment, 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, so as to better meet the heat exchange needs of different batteries 1000; 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, so that the heat exchange element 100 is more convenient in design and arrangement; multiple first heat exchange channels 10 are arranged to be arranged around each other, so that the multiple first heat exchange channels 10 in the heat exchange element 100 can have better integrity, and the overall structural arrangement of the heat exchange element 100 can be more flexible and compact, so that the heat exchange element 100 can better meet the heat exchange area requirements of the battery cells 2011 at different positions in the battery assembly 200.

[0459] In one example of this application, reference Figure 4As shown, the number of heat exchange tubes can be multiple, and the multiple heat exchange tubes form multiple heat exchange channels. The multiple heat exchange channels are arranged at intervals along the third direction, and the two heat exchange channels located at both ends of the third direction are both first heat exchange channels 10, and the two first heat exchange channels 10 can be symmetrically arranged about the center line of the heat exchange element 100 along the first direction, wherein the first direction is set at an angle to the third direction.

[0460] It can be understood that arranging the second heat exchange section 12 of the first heat exchange channel 10 on the periphery of the battery assembly 200 can improve the uniformity of the temperature inside and outside the battery assembly 200. Therefore, the two heat exchange channels located at both ends of the first direction are formed into the first heat exchange channel 10, which can make the battery cells 2011 at both ends of the battery assembly 200 in the first direction have better temperature uniformity performance and achieve overall temperature uniformity of the battery assembly 200.

[0461] Furthermore, the fluid flow directions and the inlets and outlets at both ends of the two first heat exchange channels 10 are arranged symmetrically, so that the two first heat exchange channels 10 can synchronously exchange heat for the battery assembly 200 at both ends of the first direction, achieving a better temperature equalization effect.

[0462] “The first direction is arranged at an angle to the third direction” is intended to explain that the third direction and the first direction can be arranged vertically, or can be arranged non-vertically so as to only intersect. For example, the third direction and the first direction can be arranged at an angle of 30°, 40°, 50°, 60°, 70°, 80°, etc.

[0463] In the above embodiment, by providing two symmetrically arranged first heat exchange channels 10, liquid can be fed into both sides simultaneously, the liquid flow rate can be increased, the length of a single heat exchange channel can be shortened, and the pressure drop in a single heat exchange channel can be reduced, thereby improving the heat exchange efficiency.

[0464] In some specific embodiments of the present application, Figure 4 As shown, the plurality of heat exchange channels may be symmetrically arranged about a center line of the heat exchange element 100 along the first direction.

[0465] Among them, the flow directions of multiple heat exchange channels and the inlets and outlets at both ends are also arranged symmetrically, so that the heat exchange element 100 can be divided into two symmetrically distributed parts. In this way, during the heat exchange process, the fluid distribution of the two symmetrical parts of the heat exchange element 100 is consistent, thereby improving the temperature consistency of the heat exchange areas of the battery assembly 200 corresponding to the two parts of the heat exchange element 100, thereby further improving the temperature uniformity of the battery assembly 200.

[0466] In the above embodiment, by arranging a plurality of heat exchange channels symmetrically about the center line of the heat exchange element 100 along the first direction, the plurality of heat exchange channels can synchronously exchange heat with the battery assembly 200 to improve the heat exchange efficiency. At the same time, the temperature consistency of the two symmetrically arranged heat exchange areas of the battery assembly 200 and the heat exchange element 100 can also be improved, thereby further improving the temperature uniformity effect of the battery assembly 200.

[0467] In some specific embodiments of the present application, multiple heat exchange channels are arranged asymmetrically about the center line of the heat exchange element 100 along the first direction. In this way, the multiple heat exchange channels can be designed according to the actual situation of the battery assembly 200, so that the heat exchange element 100 can meet the heat exchange requirements of the battery assembly 200, and further ensure the heat exchange effect of the battery assembly 200.

[0468] In one example of this application, reference Fig.11 As shown, 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 is the same as or different from the structure of the first heat exchange channel 10 .

[0469] Specifically, the second heat exchange channel 30 can be arranged between the two first heat exchange channels 10, and is mainly used for heat exchange with the middle position of the battery assembly 200, wherein the temperature of the battery unit 201 arranged in the middle position is relatively balanced. 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 conditions of the battery 1000.

[0470] In addition, the number of the second heat exchange channels 30 can be one or more. For example, the number of the second heat exchange channels 30 can be one, two, three or more. The number of the second heat exchange channels 30 can be selected according to the arrangement of the battery components 200.

[0471] In the above embodiment, by providing at least one second heat exchange channel 30 , the diversity of the heat exchange channel arrangement can be increased, so that the heat exchange element 100 can better exchange heat with the battery assembly 200 , thereby improving the heat exchange effect of the heat exchange element 100 .

[0472] In a specific embodiment of the present application, reference Fig.11 As shown, 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 may be the same as or different from the structure of the first heat exchange channel 10 .

[0473] Specifically, the second heat exchange channel 30 is arranged between the two first heat exchange channels 10, and is mainly used for heat exchange with the middle position of the battery assembly 200, wherein the temperature of the battery unit 201 arranged in the middle position is relatively balanced. Therefore, 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. For example, the structure of the second heat exchange channel 30 may be a simple U-shaped structure. Furthermore, the structure of the second heat exchange channel 30 may be designed according to the actual heat exchange conditions of the battery 1000.

[0474] In addition, the number of the second heat exchange channels 30 can be one or more. For example, the number of the second heat exchange channels 30 can be one, two, three or more. The number of the second heat exchange channels 30 can be selected according to the arrangement of the battery components 200.

[0475] In the above embodiment, by providing at least one second heat exchange channel 30 , the diversity of the heat exchange channel arrangement can be increased, so that the heat exchange element 100 can better exchange heat with the battery assembly 200 , thereby improving the heat exchange effect of the heat exchange element 100 .

[0476] In some specific embodiments of the present application, reference is made to Fig.11 As shown, the second heat exchange channel 30 may include a plurality of fourth heat exchange segments 31, and the plurality of fourth heat exchange segments 31 are sequentially connected, wherein the fourth heat exchange segments 31 may extend along the first direction, and the plurality of fourth heat exchange segments 31 are arranged at intervals in the third direction.

[0477] Specifically, a plurality of fourth heat exchange segments 31 are sequentially connected to form a U-shaped heat exchange channel or an S-shaped heat exchange channel.

[0478] For example, the number of the fourth heat exchange segments 31 may be two, three or more, and the number of the fourth heat exchange segments 31 may be designed according to the size of the battery assembly 200 .

[0479] In the above embodiment, by setting the second heat exchange channel 30 to include multiple fourth heat exchange segments 31 connected in sequence, the structural complexity of the second heat exchange channel 30 can be reduced, and then the production cost of the second heat exchange channel 30 can be reduced, thereby reducing the production cost of the heat exchange component 100.

[0480] In one example of this application, Fig.12 As shown, the number of heat exchange tubes can be multiple, one of which defines a 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 in the U-shaped area 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, and the bending structures of the first heat exchange channel 10 and the third heat exchange channel 40 are the same or different.

[0481] At least one of the plurality of heat exchange tubes is formed with a third heat exchange channel 40, and the third heat exchange channel 40 may be formed with one or more, for example, the number of the third heat exchange channel 40 may be one, two, three or more. The first heat exchange channel 10 and the third heat exchange channel 40 may each include a first heat exchange portion 111, a second heat exchange portion 121, a third heat exchange portion 122 and a fourth heat exchange portion 125.

[0482] For example Fig.12 As shown, 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 in the U-shaped area 120 of the first heat exchange channel 10 .

[0483] Specifically, the first heat exchange channel 10 and the third heat exchange channel 40 each include a first heat exchange portion 111, a second heat exchange portion 121, a third heat exchange portion 122 and a fourth heat exchange portion 125. The first heat exchange portion 111, the third heat exchange portion 122 and the fourth heat exchange portion 125 of the first heat exchange channel 10 and the third heat exchange channel 40 all extend along the X direction, and the second heat exchange portion 121 extends along the Y direction. Among them, the fourth heat exchange portion 125, the second heat exchange portion 121 and the third heat exchange portion 122 are bent and connected in sequence to form a U-shaped structure with an opening facing the side away from the coordinate origin in the X direction. The first heat exchange portion 111 includes a plurality of first heat exchange portions 111, which are arranged in the U-shaped area 120, and are arranged at intervals along the Y direction and bent and connected in sequence.

[0484] The third heat exchange part 122 of the first heat exchange channel 10 is arranged on the side of the multiple first heat exchange parts 111 far from the coordinate origin in the Y direction, and the fourth heat exchange part 125 is arranged on the side of the multiple first heat exchange parts 111 close to the coordinate origin in the Y direction, and the third heat exchange channel 40 is connected to the first heat exchange part 111 farthest from the coordinate origin in the Y direction. The third heat exchange part 122 of the third heat exchange channel 40 is arranged on the side of the multiple first heat exchange parts 111 close to the coordinate origin in the Y direction, and the fourth heat exchange part 125 is arranged on the side of the multiple first heat exchange parts 111 far from the coordinate origin in the Y direction, and the third heat exchange part 122 of the third heat exchange channel 40 is connected to the first heat exchange part 111 closest to the coordinate origin in the Y direction. The third heat exchange channel 40 is arranged between the fourth heat exchange part 125 of the first heat exchange channel 10 and the multiple first heat exchange parts 111.

[0485] In addition, the first heat exchange channel 10 and the third heat exchange channel 40 also include a first entrance and exit section 15 and a second entrance and exit section 17, wherein the first entrance and exit section 15 of the first heat exchange channel 10 is connected to the fourth heat exchange part 125, and the second entrance and exit section 17 is connected to the first heat exchange part 111 which is closest to the coordinate origin in the Y direction; the first entrance and exit section 15 of the third heat exchange channel 40 is connected to the first heat exchange part 111 which is farthest from the coordinate origin in the Y direction, and the second entrance and exit section 17 is connected to the fourth heat exchange part 125.

[0486] In the above embodiment, by setting up multiple heat exchange channels, the diversity of the heat exchange channels can be increased, so that the arrangement of the 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.

[0487] In one example of this application, reference Fig.12 and Fig.13 As shown, 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 part of the first heat exchange segment 11 of the first heat exchange channel 10 is disposed in the U-shaped region 120 of the third heat exchange channel 40 .

[0488] It is understandable that, the first heat exchange channel 10 may have only a portion of the first heat exchange section 11 disposed in the U-shaped region 120 of the third heat exchange channel 40 , or may have the entire first heat exchange section 11 disposed in the U-shaped region 120 of the third heat exchange channel 40 .

[0489] For example Fig.13 As shown, the plurality of 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 .

[0490] Specifically, the first heat exchange channel 10 and the two third heat exchange channels 40 each include a first heat exchange portion 111, a second heat exchange portion 121, a third heat exchange portion 122 and a fourth heat exchange portion 125. The fourth heat exchange portion 125, the second heat exchange portion 121 and the third heat exchange portion 122 of the first heat exchange channel 10 and any one of the two third heat exchange channels 40 are bent and connected in sequence to form a U-shaped structure with an opening facing the side away from the coordinate origin in the X direction; the first heat exchange portion 111 includes a plurality of first heat exchange portions 111, which are arranged in the U-shaped region 120, and the plurality of first heat exchange portions 111 extend straightly in the X direction, and are arranged at intervals in the Y direction and bent and connected in sequence; the second heat exchange portion 121 extends in the Y direction, and the third heat exchange portion 122 and the fourth heat exchange portion 125 both extend in the X direction.

[0491] Among them, the third heat exchange part 122 of the first heat exchange channel 10 is located on the side of the multiple first heat exchange parts 111 away from the coordinate origin in the Y direction, and is connected to the first heat exchange part 111 farthest from the coordinate origin in the Y direction, and the fourth heat exchange part 125 is located on the side of the multiple first heat exchange parts 111 close to the coordinate origin in the Y direction.

[0492] The third heat exchange part 122 of the third heat exchange channel 40a is located on the side of the plurality of first heat exchange parts 111 far from the coordinate origin in the Y direction, and is connected to the first heat exchange part 111 farthest from the coordinate origin in the Y direction. The third heat exchange part 122 of the third heat exchange channel 40a and the first heat exchange part 111 of the third heat exchange channel 40a farthest from the coordinate origin in the Y direction are located between the third heat exchange part 122 of the first heat exchange channel 10 and the plurality of first heat exchange parts 111 of the first heat exchange channel 10. The plurality of first heat exchange parts 111 of the first heat exchange channel 10 are located between the first heat exchange part 111 of the third heat exchange channel 40a farthest from the coordinate origin in the Y direction and the second first heat exchange part 111 of the third heat exchange channel 40a on the side far from the coordinate origin in the Y direction.

[0493] The third heat exchange channel 40b is located between the fourth heat exchange part 125 of the third heat exchange channel 40a and the multiple first heat exchange parts 111 of the third heat exchange channel 40a, and the fourth heat exchange part 125 of the third heat exchange channel 40b is located on the side of the multiple first heat exchange parts 111 of the third heat exchange channel 40b away from the coordinate origin in the Y direction, and the third heat exchange part 122 of the third heat exchange channel 40b is connected to the first heat exchange part 111 of the third heat exchange channel 40 that is closest to the coordinate origin in the Y direction.

[0494] In addition, the first heat exchange channel 10 and the two third heat exchange channels 40 also include a first inlet and outlet section 15 and a second inlet and outlet section 17 , wherein the first inlet and outlet section 15 and the second inlet and outlet section 17 are respectively connected to the fourth heat exchange part 125 and the first heat exchange part 111 .

[0495] In the above embodiment, by setting the third heat exchange channel 40 to include a U-shaped area 120 with the same structure as the first heat exchange channel 10, at least a portion of the first heat exchange section 11 of the first heat exchange channel 10 is arranged in the U-shaped area 120 of the third heat exchange channel 40, so that at least a portion of the first heat exchange channel 10 and the third heat exchange channel 40 can be arranged around each other. In this way, the winding method of the heat exchange channel can be arranged according to the heat exchange requirements of various parts of the battery assembly 200, thereby further increasing the heat exchange effect of the heat exchange component 100 and improving the temperature uniformity of the battery 1000.

[0496] According to some embodiments of the present application, Fig.12 and Fig.13As shown, the U-shaped region 120 of the second heat exchange section 12 of the first heat exchange channel 10 is located at the outermost circumference of the heat exchange element 100 .

[0497] That is to say, the U-shaped area 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 area 120 of the first heat exchange channel 10 can be used to exchange heat with the outer peripheral edge of the battery assembly 200, thereby improving the heat exchange effect on the peripheral edge of the battery assembly 200.

[0498] In the above embodiment, by arranging the U-shaped area 120 of the second heat exchange section 12 of the first heat exchange channel 10 to be located at the outermost circumference of the heat exchange element 100, the second heat exchange section 12 can exchange heat on the outer circumference of the battery 1000, which is beneficial to improving the temperature difference of the battery 1000 in different environments and increasing the service life of the battery 1000 to a certain extent.

[0499] In some embodiments of the present application, reference Figure 4 and Fig.14 As shown, the heat exchange tube can be formed by bending a single tube. The heat exchange tube can be bent in an arc shape at the bending position.

[0500] The single tube bending forming means that the heat exchange tube can be formed by bending a single straight tube multiple times through a processing technology such as pressing and rolling. For example, a single straight tube can be bent at multiple preset positions to form a V shape, a U shape, etc. at the bending position. The bending shape of the single tube can be designed according to actual conditions.

[0501] In the above-mentioned embodiment, by setting the heat exchange tube to be formed by bending a single tube, the number of welding points of the heat exchanger 100 can be reduced, thereby reducing the risk of leakage of the heat exchanger 100 and improving the reliability of the use of the heat exchanger 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 exchanger 100.

[0502] In some embodiments of the present application, the heat exchange tube can be bent in an arc shape at a bending position.

[0503] 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 bending 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 element 100.

[0504] In the above embodiment, by setting the heat exchange tube to be bent in an arc shape at the bending 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.

[0505] According to some embodiments of the present application, Fig.14 As shown, the bending angle of the heat exchange tube at the bending position is less than 180°.

[0506] For example, the bending angle of the heat exchange tube at the bending position may be 30°, 60°, 90°, 120°, 150° or 179°.

[0507] In the above embodiment, 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.

[0508] In one embodiment of the present application, reference Fig.14 As shown, 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.

[0509] For example, Fig.12 As shown in , the bending radius of the heat exchange tube on the center line along the length direction is recorded as r, and the width of the heat exchange tube is recorded as d. 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.

[0510] It should be noted that when the heat exchange tube is bent, under the action of internal pressure stress, the circular cross-section tends to be elliptical, producing a short axis and a long axis. The tube bending machine will generate additional stress at the long axis. The greater the ellipticity, that is, the greater the bending angle, the smaller the ratio of the bending radius to the width of the heat exchange tube, the greater the additional stress, and even a high stress area may be formed, resulting in local plastic deformation. When it reaches a certain value, the bearing capacity of the bent tube will be reduced and it will be damaged.

[0511] In the above embodiment, by setting 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 to be greater than or equal to 0.6, the heat exchange tube can be made less likely to be damaged by bending and stretching, thereby reducing the probability of damage to the heat exchange tube when 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.

[0512] In some examples of this application, reference Fig.14 As shown, 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.

[0513] For example, Fig.12 As shown in , the bending radius of the heat exchange tube on the center line along the length direction is recorded as r, and the width of the heat exchange tube is recorded as d. The ratio of r to d can be 0.8, 1.0, 1.2, 1.4, 1.6, 1.8, 2.0 or above.

[0514] In the above embodiment, by setting the ratio of the bending radius of the heat exchange tube to the width of the heat exchange tube to be further limited to greater than or equal to 0.8, the probability of damage to the heat exchange tube when 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.

[0515] In some examples of this application, reference Fig.14 As shown, the wall thickness of the heat exchange tube at the bending position can be greater than or equal to 0.2 mm.

[0516] For example, the wall thickness of the heat exchange tube at the bending position can be 0.2 mm, 0.3 mm, 0.4 mm or above.

[0517] In the above embodiment, 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 can be prevented from being too thin, which is beneficial to ensuring 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, thereby improving the reliability of the use of the heat exchange tube.

[0518] In one embodiment of the present application, at the bending position of the heat exchange tube, the bending thinning rate of the wall thickness of the heat exchange tube may be less than or equal to 50%.

[0519] The bending reduction rate is equal to the thickness loss of the heat exchange tube divided by the original thickness multiplied by 100%.

[0520] For example, the bending reduction rate of the wall thickness of the heat exchange tube may be 2%, 5%, 10%, 20%, 30%, 40% or 50%.

[0521] In the above embodiment, by setting the bending thinning rate of the wall thickness of the heat exchange tube to be less than or equal to 50%, the wall thickness loss of the heat exchange tube can be within a preset range, and the wall thickness of the heat exchange tube at the bending position can be prevented from being too thin, which is beneficial to ensuring the strength of the heat exchange tube at the bending position, and thus effectively reducing the risk of leakage at the bending position of the heat exchange tube, thereby improving the reliability of the heat exchange tube.

[0522] In some examples of the present application, the bending thinning rate of the heat exchange tube may be less than or equal to 30%.

[0523] For example, the bending reduction rate of the wall thickness of the heat exchange tube may be 2%, 5%, 10%, 20% or 30%.

[0524] In the above embodiment, by setting the bending thinning rate of the heat exchange tube to be less than or equal to 30%, the wall thickness loss of the heat exchange tube after bending can be further reduced, and the strength of the heat exchange tube at the bending position can be further improved.

[0525] In some embodiments of the present application, the heat exchange tube may be a flat tube or a harmonica tube.

[0526] It is understandable that in some embodiments, the heat exchange tube is a flat tube, and in other embodiments, the heat exchange tube is a harmonica tube. A flat tube refers to a heat exchange tube having a non-circular cross section perpendicular to its extension direction, such as an elliptical or rectangular cross section; a harmonica tube is a type of flat tube.

[0527] Specifically, the upper and lower surfaces of the flat tube are flat and the contact area is large, 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 when the bending and torsional strengths are the same. Therefore, using flat tubes as heat exchange tubes can also reduce the overall weight of the heat exchanger 100, and thus improve the energy density of the battery 1000.

[0528] Furthermore, a heat exchange channel may be formed inside the flat tube, or a plurality of heat exchange channels may be formed by arranging a partition inside the flat tube.

[0529] For example, the flat tube and the harmonica tube may be provided with dividing ribs, which may extend along the length direction of the flat tube or the harmonica tube and divide the heat exchange flow channel in the flat tube or the harmonica tube into a plurality of sub-flow channels.

[0530] In the above embodiment, by setting the heat exchange tube to 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.

[0531] In some embodiments of the present application, the heat exchange tube may be an aluminum tube.

[0532] In the above embodiment, the heat exchange tube is set to be an aluminum tube. The aluminum tube is light in weight, low in price, has good structural strength, and has good thermal conductivity. The production and processing cost of the heat exchange component 100 is low and the lightweight requirement of the battery 100 can be better met. The heat exchange tube has good heat exchange efficiency when exchanging heat with the battery cell 2011, thereby making the heat exchange effect of the battery cell 2011 better.

[0533] In one embodiment of the present application, reference Fig.14 As shown, the wall thickness of the heat exchange tube can be 0.2mm-3mm.

[0534] For example, Fig.12 As shown in , the wall thickness of the heat exchange tube is denoted as m, and 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.

[0535] In the above embodiment, by setting the wall thickness of the heat exchange tube to 0.2mm-3mm, the heat exchange tube has an appropriate wall thickness, so that the wall thickness of the heat exchange tube is not too small, thereby ensuring the use strength of the heat exchange tube and effectively reducing the risk of damage to the heat exchange tube; the wall thickness of the heat exchange tube is not too large, which is beneficial to reducing the overall weight of the heat exchange tube, thereby reducing the overall weight of the battery 1000 and achieving lightweight battery 1000.

[0536] In one embodiment of the present application, reference Fig.14 As shown, the wall thickness of the heat exchange tube can be 0.5mm-1.2mm.

[0537] For example, the wall thickness m of the heat exchange tube may be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm or 1.2 mm, etc.

[0538] In the above embodiment, by setting the wall thickness of the heat exchange tube to 0.5 mm-1.2 mm, the strength of the heat exchange tube can be ensured while the overall weight of the heat exchange tube can be reduced, thereby achieving lightweight battery 1000.

[0539] In one embodiment of the present application, the heat exchange element 100 may include a heat exchange plate, and the heat exchange channel may be formed on the heat exchange plate by stamping.

[0540] Among them, stamping is a forming method that uses a press and a die to apply external force to plates, strips, tubes and profiles to cause plastic deformation or separation, thereby obtaining a workpiece (stamping part) of a desired shape and size. In this way, the heat exchanger 100 does not need to be assembled, which can reduce the number of parts of the heat exchanger 100, reduce the assembly steps of the battery 1000, and increase the assembly rate of the battery 1000.

[0541] In the above embodiment, the heat exchange flow channel is stamped on the heat exchange plate, which can reduce the process steps of the heat exchange component 100 and thus improve the production rate of the heat exchange component 100; at the same time, stamping is simple to make and has low material consumption, which can also reduce the production cost of the heat exchange component 100.

[0542] In some examples of this application, reference Fig.14 As shown, the width of the heat exchange channel can be 3mm-200mm.

[0543] 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 of the battery cell 2011.

[0544] In the above embodiment, 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 element 100; the width of the heat exchange channel can also be prevented from being too small, so that the number of arrangements of the first heat exchange section 11 can be reduced, thereby reducing the overall cost of the heat exchange element 100.

[0545] In one example of this application, reference Fig.14 As shown, the width f of the heat exchange channel can be 5mm-80mm.

[0546] For example, the width f of the heat exchange channel can be 5 mm, 7 mm, 9 mm, 12 mm, 15 mm, 16 mm, 18 mm, 21 mm, 23 mm, 24 mm, 26 mm, 28 mm, 30 mm, 40 mm, 50 mm, 60 mm, 70 mm or 80 mm.

[0547] In the above embodiment, by setting the width of the heat exchang...

Claims

1. A battery, characterized in that: include: A battery assembly (200), the battery assembly (200) comprising a battery unit (201), the battery unit (201) comprising a plurality of battery cells (2011) stacked in a first direction; A heat exchange component (100) is arranged on one side of the battery assembly (200) in the second direction, the first direction and the second direction intersect, the heat exchange component (100) comprises a heat exchange tube, the heat exchange tube has a heat exchange flow channel, the heat exchange flow channel is bent and extends on the surface of one side of the battery assembly (200) in the second direction, The wall surface where the battery cell (2011) and the heat exchange tube cooperate is taken as the projection surface, and the area of ​​the orthographic projection of the heat exchange tube on the wall surface corresponding to each battery cell (2011) 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 orthographic projection of the heat exchange tube on the wall surface is greater than or equal to 30% of the area of ​​the wall surface.

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 orthographic projection of the heat exchange tube on the wall surface is greater than or equal to 15% 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 orthographic projection of the heat exchange tube on the wall surface is greater than or equal to 45% of the area of ​​the wall surface.

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 orthographic projection of the heat exchange tube on the wall surface is greater than or equal to 30% 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 orthographic projection of the heat exchange tube on the wall surface is greater than or equal to 65% of the area of ​​the wall surface.

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 orthographic projection of the heat exchange tube on the wall surface is greater than or equal to 45% 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 orthographic projection of the heat exchange tube on the wall surface is greater than or equal to 75% of the area of ​​the wall surface.

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 orthographic projection of the heat exchange tube on the wall surface is greater than or equal to 65% 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 orthographic projection of the heat exchange tube on 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 orthographic projection of the heat exchange tube on the wall surface is greater than or equal to 75% and less than 90% of the wall surface area.

12. The battery according to any one of claims 1 to 11, characterized in that The heat exchange channel comprises a first heat exchange channel (10), the first heat exchange channel (10) comprises 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 area, the first heat exchange section (11) is bent and arranged in the U-shaped area, 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) constitute peripheral battery cells, and at least a portion of the second heat exchange section (12) is in contact with the peripheral battery cells.

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 plurality of battery cells (2011) included in the first group of battery cells (202) are stacked and arranged along the first direction, the plurality of battery cells (2011) included in the second group of battery cells (203) are stacked and arranged along a third direction, the plurality of battery cells (2011) included in the third group of battery cells (204) are stacked and arranged along the third direction, and the first direction, the second direction and the third direction are arranged at an angle to each other; The second heat exchange section (12) comprises a second heat exchange portion (121), a third heat exchange portion (122) and a fourth heat exchange portion (125) which are connected; The second heat exchange portion (121) extends and fits the first group of battery cells (202) to enable heat exchange, and / or the third heat exchange portion (122) extends and fits the second group of battery cells (203) to enable heat exchange, and / or the fourth heat exchange portion (125) extends and fits the third group of battery cells (204) to enable heat exchange.

14. The battery according to claim 13, characterized in that: The peripheral battery cells also include a fourth group of battery cells (205), wherein the plurality of battery cells (2011) included in the fourth group of battery cells (205) are arranged along the first direction, and the second heat exchange section (12) also includes a fifth heat exchange portion (127), wherein the fifth heat exchange portion (127) closes at least a portion of an opening of the U-shaped region formed by the second heat exchange portion (121), the third heat exchange portion (122) and the fourth heat exchange portion (125), and the fifth heat exchange portion (127) extends and fits 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) comprises a plurality of first heat exchange parts (111), wherein the plurality of first heat exchange parts (111) are arranged at intervals and are bent and connected 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 portion (121) and at least one of the first heat exchange portions (111) of the first heat exchange section (11) are jointly attached to the first group of battery cells (202) to enable 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 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, The first end of the third heat exchange portion (122) is connected to the second heat exchange portion (121) at an angle, the second end of the third heat exchange portion (122) is connected to one of the plurality of first heat exchange portions (111) which is farthest from the second heat exchange portion (121) along the third direction, and the second end of the third heat exchange portion (122) is connected to the first heat exchange section (11) at an angle.

18. The battery according to claim 17, characterized in that The first heat exchange channel (10) further comprises: a third heat exchange section (13), the third heat exchange section (13) being connected to an end of the first heat exchange section (11) away from the second heat exchange section (12), and being connected to the first heat exchange section (11) at an angle. The third heat exchange section (13) is arranged on a side of the first heat exchange section (11) away from the third heat exchange portion (122), and is connected to one of the plurality of first heat exchange portions (111) that is closest to the second heat exchange portion (121) along the third direction; The battery assembly (200) further comprises a fifth group of battery cells (206), wherein a plurality of battery cells (2011) of the fifth group of battery cells (206) are stacked and arranged along the third direction, and the fifth group of battery cells (206) are arranged adjacent to the third group of battery cells (204). Wherein, 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 outside of the battery assembly (200) in the first direction.

19. The battery according to claim 18, characterized in that Also includes: a first inlet and outlet section (15), one end of the first inlet and outlet section (15) being connected to the third heat exchange section (13) at an angle, and the other end of the first inlet and outlet section (15) forming a first inlet and outlet of the first heat exchange channel (10); a second inlet and outlet section (17), one end of the second inlet and outlet section (17) being connected to the fourth heat exchange portion (125) at an angle, and the other end of the second inlet and outlet section (17) forming a second inlet and outlet of the first heat exchange channel (10), One of the first inlet and outlet and the second inlet and 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 to 19, characterized in that The first heat exchange section (11) comprises a plurality of first heat exchange parts (111), wherein the plurality of first heat exchange parts (111) are arranged at intervals and are bent and connected in sequence. A plurality of the first heat exchange parts (111) and the second heat exchange parts (121) all extend along the first direction and are arranged at intervals in the third direction. One of the battery units (201) is bonded to one of the second heat exchange parts (121) and at least one of the first heat exchange parts (111) to enable heat exchange; or one of the battery units (201) is bonded to at least two of the first heat exchange parts (111) to enable 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 of the first heat exchange channels (10) comprises: five first heat exchange parts (111), one second heat exchange part (121), one third heat exchange part (122), one fourth heat exchange part (125) and one third heat exchange section (13), The number of the battery cells (201) is four, the battery cell (201) located at the end in the third direction is attached to two of the first heat exchange parts (111) and one of the second heat exchange parts (121) to enable heat exchange, and any other of the battery cells (201) is attached to three of the first heat exchange parts (111) to enable heat exchange, The battery assembly (200) further comprises a fifth group of battery cells (206), wherein a plurality of battery cells (2011) of the fifth group of battery cells (206) are stacked and arranged along the third direction, and the fifth group of battery cells (206) are arranged adjacent to the third group of battery cells (204). The third heat exchange portion (122) is connected to the second heat exchange portion (121) and the first heat exchange portion (111) which is farthest from the second heat exchange portion (121), and is fitted 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 portion (111) which is closest to the second heat exchange portion (121), and is fitted with the fifth group of battery cells (206) to enable heat exchange. The fourth heat exchange portion (125) is fitted with the third group of battery cells (204) to enable heat exchange.

22. The battery according to claim 20, characterized in that The number of the first heat exchange channels (10) is two, and each of the first heat exchange channels (10) comprises: five first heat exchange parts (111), one second heat exchange part (121), one third heat exchange part (122), one fourth heat exchange part (125) and one third heat exchange section (13), The number of the battery cells (201) is six, the battery cell (201) located at the end in the third direction is attached to a first heat exchange portion (111) and a second heat exchange portion (121) to enable heat exchange, and any other battery cells (201) are attached to two of the first heat exchange portions (111) to enable heat exchange, The battery assembly (200) further comprises a fifth group of battery cells (206), wherein a plurality of battery cells (2011) of the fifth group of battery cells (206) are stacked and arranged along the third direction, and the fifth group of battery cells (206) are arranged adjacent to the third group of battery cells (204). The third heat exchange portion (122) is connected to the second heat exchange portion (121) and the first heat exchange portion (111) which is farthest from the second heat exchange portion (121), and is fitted 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 portion (111) which is closest to the second heat exchange portion (121), and is fitted with the fifth group of battery cells (206) to enable heat exchange. The fourth heat exchange portion (125) is fitted with the third group of battery cells (204) to enable heat exchange.

23. The battery according to claim 20, characterized in that The number of the first heat exchange channels (10) is two, and each of the first heat exchange channels (10) comprises: three first heat exchange parts (111), one second heat exchange part (121), one third heat exchange part (122), one fourth heat exchange part (125) and one third heat exchange section (13), The number of the battery units (201) is four, the battery unit (201) located at the end in the third direction is attached to a first heat exchange portion (111) and a second heat exchange portion (121) to enable heat exchange, and any other battery unit (201) is attached to two of the first heat exchange portions (111) to enable exchange, The battery assembly (200) further comprises a fifth group of battery cells (206), wherein a plurality of battery cells (2011) of the fifth group of battery cells (206) are stacked and arranged along the third direction, and the fifth group of battery cells (206) are arranged adjacent to the third group of battery cells (204). The third heat exchange portion (122) is connected to the second heat exchange portion (121) and the first heat exchange portion (111) which is farthest from the second heat exchange portion (121), and is fitted 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 portion (111) which is closest to the second heat exchange portion (121), and is fitted with the fifth group of battery cells (206) to enable heat exchange. The fourth heat exchange portion (125) is fitted with the third group of battery cells (204) to enable heat exchange.

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

25. The battery according to any one of claims 13 to 19, characterized in that The first heat exchange section (11) is connected downstream of the second heat exchange section (12) along the fluid flow direction; 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) along the direction of fluid flow; 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) along the direction of fluid flow.

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

27. The battery according to claim 26, characterized in that The number of the 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 one of the second heat exchange channels (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 the heat exchange tubes is multiple, one of which defines the first heat exchange channel (10), the heat exchange channel of at least one of the heat exchange tubes is formed as a third heat exchange channel (40), the third heat exchange channel (40) is bent in the U-shaped area 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, and 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) comprises a U-shaped region having 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 arranged in the U-shaped region of the third heat exchange channel (40).

30. The battery according to any one of claims 1 to 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 bending position.

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

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

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

39. The battery according to any one of claims 1 to 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 flow 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 flow channel is 0.328W / (m·K)-0.417W / (m·K).

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

42. The battery according to any one of claims 1 to 11, characterized in that The shell of the battery cell (2011) is a three-series aluminum alloy part or a five-series aluminum alloy part.

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

44. The battery according to any one of claims 1 to 11, characterized in that The battery further comprises a box body (300), wherein the box body (300) comprises a box body (301), wherein the box body (301) is an integral stamped part and comprises a bottom wall and a surrounding wall, and the battery assembly (200) is arranged in the box body (301).

45. The battery according to claim 44, characterized in that The thermal management system of the battery comprises a temperature regulating component (500), wherein the temperature regulating component (500) comprises at least one of a first temperature regulating component (501) and a second temperature regulating component (502), The first temperature regulating component (501) is arranged outside the box body (301) and is in contact with the outer wall of the box body (301); The second temperature regulating component (502) is disposed in the box (300) and is located between any side of the outer peripheral surface of the battery cell (2011) and the box (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 further comprises a third temperature regulating component (503), wherein the third temperature regulating component (503) is arranged in the box body (300) and between two adjacent battery cells (2011), and the structure of the third temperature regulating component (503) is the same as or different from the structure of the heat exchange component (100).

47. An electrical device, characterized in that: Comprising a battery according to any one of claims 1-46.

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