Battery and electric device

Abstract

A battery (1) and an electric device. The battery (1) comprises: a case (200) having an accommodating cavity (21); and a first heat exchange member (100) attached to the outer side of the wall of the case (200) away from the accommodating cavity (21) and used for exchanging heat with battery cells (102).

Description

Batteries and electrical devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number: 202410172422.0 and application date of February 6, 2024, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0004] New energy vehicles have experienced rapid growth in recent years. Within the electric vehicle sector, power batteries, as the power source, play an irreplaceable and crucial role. A battery consists of a housing and multiple cells contained within it. As a core component of new energy vehicles, batteries are subject to stringent requirements for both safety and longevity. To ensure battery life, existing technologies integrate cold plates within the housing to cool the batteries. However, associated sealing and leakage issues with the cold plates hinder further improvements in battery reliability and lifespan.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a battery and an electrical device, which can effectively improve the reliability of the battery.

[0007] In a first aspect, an embodiment of the present application provides a battery, comprising: a box having a receiving cavity; and a first heat exchanger, disposed on the outer side of the box wall away from the receiving cavity, for heat exchange with a battery cell.

[0008] In the above technical solution, on the one hand, since the first heat exchanger is fitted on the outer side of the wall of the box away from the accommodating cavity, the requirements for the sealing and insulation of the side of the box close to the first heat exchanger can be reduced, thereby reducing the probability of the first heat exchanger leaking and causing battery safety hazards, improving the reliability of the battery, and since most of the sealing and insulation structures are omitted, the manufacturing cost of the battery can also be reduced and the volume energy density of the battery can be increased. On the other hand, the box directly bears the weight of the battery cell, and the first heat exchanger is not in direct contact with the battery cell and does not directly bear the task of supporting the battery cell. Therefore, the first heat exchanger bears less load and force, which can improve the reliability of the first heat exchanger, thereby further improving the reliability of the battery. In addition, the first heat exchanger is located on the outside of the box, which can protect the bottom wall of the box, thereby further improving the reliability of the battery.

[0009] In some embodiments of the present application, the accommodating cavity includes a first cavity, the first cavity is used to accommodate a battery cell, the first heat exchange element has a heat exchange area for heat exchange, and the area of ​​the projection contour of the orthographic projection of the heat exchange area on the side of the box body close to the first heat exchange element is greater than or equal to the projection surface area of ​​the orthographic projection of the first cavity on the side of the box body close to the first heat exchange element, and is smaller than the area of ​​the side of the box body close to the first heat exchange element.

[0010] In the above technical solution, the heat exchange area can cover the area where the first cavity is located, but will not exceed the side area of ​​the corresponding box. In this way, the size of the heat exchange area will not be too large while exchanging heat with the battery cells in the first cavity. This is conducive to reducing the size of the first heat exchange element, reducing the material used, further reducing the manufacturing cost of the battery, reducing the weight of the battery, and improving the volumetric energy density of the battery. In addition, the area of ​​the projected contour of the heat exchange area on the side of the box close to the first heat exchange side is smaller than the area of ​​the side of the box close to the first heat exchange element. This can also reduce the probability of the heat exchange area coming into contact with other areas of the box that do not require heat exchange, reduce the impact of other parts of the box wall other than the corresponding first cavity on the battery cells, and enable the heat exchange area to focus on exchanging heat with the area where the first cavity is located, which is conducive to improving the heat exchange efficiency in the area where the first cavity is located, thereby improving the reliability of the battery.

[0011] In some embodiments of the present application, the accommodating cavity includes a second cavity for accommodating electrical components, and the orthographic projection of the second cavity on the side of the box body close to the first heat exchanger is located outside the orthographic projection of the heat exchange area on the side of the box body close to the first heat exchanger.

[0012] In the above technical solution, the orthographic projection of the second cavity on the side of the box body close to the first heat exchanger is located outside the orthographic projection of the heat exchange area on the side of the box body close to the first heat exchanger, so that the heat exchange area does not need to cover the area where the second cavity accommodating the electrical components is located, thereby effectively reducing the size of the heat exchange area, which is beneficial to further reduce the size of the first heat exchanger, reduce the material used in the first heat exchanger, and reduce the manufacturing cost of the first heat exchanger, so as to further reduce the manufacturing cost of the battery, and also help to reduce the weight of the battery.

[0013] In some embodiments of the present application, the box body includes a box body, a bottom plate and a top plate, the bottom plate and the top plate are connected to the box body, and the first heat exchange element is attached to the outside of the bottom plate and / or the outside of the top plate.

[0014] In the above technical solution, the area of ​​the bottom plate and the top plate is larger than the area of ​​the side of the box body, and there are more battery cells in contact with the first cavity. By fitting the first heat exchange component to the outside of the bottom plate and / or the outside of the top plate, the first heat exchange component can exchange heat with more battery cells and have a larger heat exchange surface, thereby better regulating the overall temperature of the battery, improving the heat exchange efficiency, and improving the uniformity of heat exchange.

[0015] In some embodiments of the present application, the box body, the bottom plate and the top plate are made of steel or aluminum.

[0016] In the above technical solution, steel parts are relatively strong and relatively cheap. By setting the box body, bottom plate and top plate as steel parts, the box body can have a relatively high structural strength and at the same time reduce the cost of the box body, thereby further reducing the manufacturing cost of the battery. Aluminum parts have the advantages of light weight, good thermal conductivity and corrosion resistance. Therefore, setting the box body, bottom plate and top plate as aluminum parts can make the box body, bottom plate and top plate relatively light, which can reduce the difficulty of assembly, improve work efficiency, and reduce the overall weight of the box body. It can also better transfer the heat in the first cavity to the first heat exchange element, which is beneficial to improve the heat exchange efficiency, enhance the heat exchange effect, and help reduce the chemical corrosion of the box body and extend the service life of the battery. In addition, when the box body, bottom plate and top plate are made of aluminum parts, it is convenient to form them by integrated stamping, which can save manufacturing costs and improve manufacturing efficiency.

[0017] In some embodiments of the present application, when the box body, bottom plate and top plate are made of steel, the thickness of the box body is 0.8 mm to 2.0 mm.

[0018] In the above technical solution, by making the box body, bottom plate and top plate of steel parts, and setting the thickness of the box body to be in the range of 0.8mm to 2.0mm, the box body can have a relatively high strength, which is beneficial to improve the strength of the box body, thereby helping to improve the overall reliability of the battery. It can also make the weight of the box body appropriate, so that the box body can have a lighter weight, which is beneficial to reducing the weight of the battery and improving the energy density of the battery.

[0019] In some embodiments of the present application, the thickness of the bottom plate and the top plate is 0.4 mm to 1.2 mm.

[0020] In the above technical solution, by making the box body, bottom plate and top plate into steel parts, and setting the thickness of the bottom plate and the top plate to be within the range of 0.4mm to 1.2mm, the bottom plate and the top plate can have relatively high strength, which is beneficial to improve the strength of the box body, thereby helping to improve the overall reliability of the battery. In addition, the weight of the bottom plate and the top plate can be made appropriate, so that the bottom plate and the top plate can have a lighter weight, which is beneficial to reducing the weight of the box body and improving the energy density of the battery.

[0021] In some embodiments of the present application, when the box body, bottom plate and top plate are made of aluminum, the thickness of the box body is 1.0 mm to 5.0 mm.

[0022] In the above technical solution, by making the box body, bottom plate and top plate of aluminum parts, and setting the thickness of the box body to be in the range of 1.0mm to 5.0mm, the box body can have a relatively high strength, which is beneficial to improve the strength of the box body, thereby helping to improve the overall reliability of the battery. It can also make the weight of the box body appropriate, so that the box body can have a lighter weight, which is beneficial to reducing the weight of the box body and improving the energy density of the battery.

[0023] In some embodiments of the present application, the thickness of the bottom plate and the top plate is 1.0 mm to 3.0 mm.

[0024] In the above technical solution, by making the box body, bottom plate and top plate of aluminum parts, and setting the thickness of the bottom plate and the top plate to be in the range of 1.0mm to 3.0mm, the bottom plate and the top plate can have relatively high strength, which is beneficial to improving the strength of the box body, thereby helping to improve the overall reliability of the battery. It can also make the weight of the bottom plate and the top plate appropriate, so that the bottom plate and the top plate have a lighter weight, which is beneficial to reducing the weight of the box body and improving the energy density of the battery.

[0025] In some embodiments of the present application, both the bottom and top panels are welded to the box body. In this technical solution, welding the bottom and top panels to the box body is less expensive than gluing and fastener connections, saving costs. Furthermore, welding offers greater connection reliability, increasing the strength of the connection between the bottom and top panels and the box body, thereby improving the reliability of the entire box.

[0026] In some embodiments of the present application, the battery further includes: a fixing member, which is provided on the box body, and is arranged close to at least one edge of the first heat exchange member, and is fastened to connect the first heat exchange member and the box body.

[0027] In the above technical solution, the fixing part can be arranged close to at least one edge of the first heat exchanger, thereby fixing at least one edge of the first heat exchanger to the box body, which can improve the connection reliability between the area where the edge of the first heat exchanger is located and the box body, thereby improving the connection firmness between the first heat exchanger and the box body, which is beneficial to improving the heat exchange stability of the first heat exchanger to the battery, thereby improving the reliability of the battery.

[0028] In some embodiments of the present application, a first groove is provided on a wall of the box body close to the first heat exchange element, and the fixing element is at least partially located in the first groove.

[0029] In the above technical solution, since the fixing member is at least partially disposed within the first groove, the first groove provides space for installing the fixing member. This improves the structural compactness of the assembly formed by the housing, fixing member, and first heat exchanger, allowing the housing to be made relatively small, thereby saving space, reducing volume, and improving the volumetric energy density of the battery. Furthermore, the first groove acts as a restraining force on the fixing member, improving the reliability of the connection between the fixing member and the housing, and thereby improving the reliability of the connection between the first heat exchanger and the housing, thereby improving the reliability of the battery and extending its service life.

[0030] In some embodiments of the present application, the box wall of the box body near the first heat exchanger protrudes toward the inner side of the accommodating cavity to form a convex portion, and the surrounding wall of the protruding position of the convex portion forms a first groove; the battery also includes: a beam body, the beam body is arranged in the accommodating cavity, the beam body is provided with a second groove, and at least part of the convex portion is arranged in the second groove.

[0031] In the above technical solution, the protrusion protrudes toward the inside of the housing, and the peripheral wall at the protruding location forms a first groove. Thus, while the first wall has the first groove formed and can accommodate the fixing member, the thickness of the remaining portion of the first wall, excluding the protrusion, can be made relatively thin, which helps reduce the thickness and weight of the first wall, thereby improving the energy density of the battery. Furthermore, the formation of the first groove in the peripheral wall of the protrusion also helps improve the strength of the first wall at the location of the first groove, reducing the likelihood of structural strength deficiency in the first wall due to the presence of the first groove, thereby improving the reliability of the first wall, and thus the reliability of the housing, and thus the overall reliability of the battery. By providing a second groove in the beam to accommodate the protrusion, the beam and protrusion are combined, reducing the likelihood of the protrusion occupying the space required by the battery cells within the housing, thereby improving the compactness of the battery's internal structure and thereby increasing the battery's volumetric energy density. Furthermore, the protrusion and the second groove cooperate to limit the beam, improving the connection reliability between the beam and the housing, thereby improving the reliability of the battery.

[0032] In some embodiments of the present application, the first heat exchange element 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 connected to the second heat exchange section by bending; the fixing member is connected to the first heat exchange section and the second heat exchange section, and is arranged close to or corresponding to the bent part of the first heat exchange section and the second heat exchange section.

[0033] In the above technical solution, the second heat exchange section is bent to form a U-shaped area, and the first heat exchange section is bent and arranged in the U-shaped area. When the first heat exchange element exchanges heat with the battery, the U-shaped area formed by the outer second heat exchange section can be opposite to the outer battery cells of the battery, and the first heat exchange section in the U-shaped area can be opposite to the inner battery cells. This allows the first heat exchange element to compensate for the internal and external temperature difference caused by the heat exchange between the outer battery cells and the environment, so that the heat exchange effect of the battery cells outside the battery and the battery cells inside the battery tends to be consistent, thereby improving the temperature uniformity of the battery, thereby extending the service life of the battery to a certain extent. The fixing member can play a restraining and limiting role in the area where the bent parts of the first and second heat exchange sections are located, thereby improving the connection reliability between the bent parts of the first and second heat exchange sections and the box body, thereby improving the working reliability of the first and second heat exchange sections, and helping to improve the reliability of the battery.

[0034] In some embodiments of the present application, the first heat exchange element 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.

[0035] In the above technical solution, the second heat exchange section is bent to form a U-shaped area, and the first heat exchange section is bent and arranged in the U-shaped area. When the first heat exchange element exchanges heat with the battery, the U-shaped area formed by the outer second heat exchange section can be opposite to the outer battery cells of the battery, and the first heat exchange section in the U-shaped area can be opposite to the internal battery cells, so that the first heat exchange element can make up for the internal and external temperature difference caused by the heat exchange between the outer battery cells and the environment, so that the heat exchange effect of the battery cells outside the battery and the battery cells inside the battery tends to be consistent, thereby improving the temperature uniformity of the battery, thereby extending the battery life to a certain extent.

[0036] In some embodiments of the present application, the first heat exchange section includes multiple first heat exchange parts, which are arranged at intervals along the first direction and are bent and connected in sequence. Each first heat exchange part extends straight along the second direction, and the first direction and the second direction are set at an angle.

[0037] In the above technical solution, on the one hand, by providing multiple first heat exchange sections, the heat exchange area of ​​the first heat exchange section can be increased, and thus the heat exchange area of ​​the first heat exchange channel can be increased, thereby improving the heat exchange effect of the first heat exchange channel. On the other hand, because the internal battery cells are surrounded by the external battery cells, the temperature difference between the internal battery cells is not large. Therefore, by providing multiple first heat exchange sections, the overall heat exchange effect can be improved while ensuring a small temperature difference between the internal and external battery cells. By providing the first heat exchange sections to extend linearly along the second direction, the difficulty of producing the first heat exchange sections can be reduced, thereby reducing the complexity of producing the first heat exchange channel. 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.

[0038] In some embodiments of the present application, the second heat exchange section includes: a second heat exchange part, a third heat exchange part and a fourth heat exchange part, the second heat exchange part extends along the first side circumference of the first heat exchange section, the third heat exchange part is connected between the second heat exchange part and the first heat exchange section, and extends along the second side circumference of the first heat exchange section, the first end of the third heat exchange part is connected to the second heat exchange part at an angle, and the second end of the third heat exchange part is connected to the first heat exchange section at an angle; the fourth heat exchange part is communicated with the second heat exchange part, is connected to the second heat exchange part at an angle, and extends along the third side circumference of the first heat exchange section.

[0039] In the above technical solution, by arranging the second heat exchange part, the third heat exchange part and the fourth heat exchange part on three sides of the first heat exchange section respectively, the second heat exchange section can surround the first heat exchange section, thereby increasing the compactness of the arrangement of the first heat exchange channel, which is beneficial to the miniaturization of the structure of the first heat exchange channel, and thus is beneficial to improving the volume energy density of the battery. At the same time, it can also simplify the structure of the first heat exchange channel and facilitate the processing and production of the first heat exchange component.

[0040] In some embodiments of the present application, the first heat exchange section includes a plurality of first heat exchange parts, and the plurality of first heat exchange parts are bent and connected in sequence in the first direction; wherein, the second heat exchange part is located on one side of the plurality of first heat exchange parts along the first direction, and the third heat exchange part is located on one side of the plurality of first heat exchange parts along the second direction, and the first direction and the second direction are arranged at an angle; the first end of the third heat exchange part is connected to one end of the second heat exchange part along the second direction, and the second end of the third heat exchange part is connected to the one of the plurality of first heat exchange parts farthest from the second heat exchange part along the first direction, and the fourth heat exchange part is located on the other side of the plurality of first heat exchange parts along the second direction, one end of the fourth heat exchange part is connected to one end of the second heat exchange part away from the third heat exchange part, and the other end of the fourth heat exchange part extends along the first direction toward a direction away from the second heat exchange part.

[0041] In the above technical solution, by setting up multiple first heat exchange parts, which are bent and connected in sequence in the first direction, the second heat exchange part is located on one side of the multiple first heat exchange parts along the first direction, the third heat exchange part is located on one side of the multiple first heat exchange parts along the second direction, and the fourth heat exchange part is located on the other side of the multiple first heat exchange parts along the second direction. The positional relationship among the second heat exchange part, the third heat exchange part, the fourth heat exchange part and the first heat exchange part is limited, the layout of the first heat exchange channel is further limited, the structure of the first heat exchange channel is simplified, and the manufacturing and processing of the first heat exchange component is facilitated.

[0042] In some embodiments of the present application, the third heat exchange portion and the fourth heat exchange portion are extended along the first direction, and the first heat exchange portion and the second heat exchange portion are both extended along the second direction.

[0043] In the above technical solution, by arranging the third heat exchange part and the fourth heat exchange part to extend along the first direction, the first heat exchange part and the second heat exchange part are both extended along the second direction, which can be beneficial to the circuitous arrangement of the first heat exchange channel, thereby reducing the production difficulty of the first heat exchange channel and reducing the production cost of the heat exchange component.

[0044] In some embodiments of the present application, the fourth heat exchange portion extends along the first direction and extends to a position close to one of the plurality of first heat exchange portions that is farthest from the second heat exchange portion.

[0045] In the above technical solution, by setting the fourth heat exchange part to extend along the first direction and extend to a position close to the one of the multiple first heat exchange parts that is farthest from the second heat exchange part, the heat exchange area of ​​the fourth heat exchange part can be increased, so that the first heat exchange channel can exchange heat with the multiple battery cells arranged corresponding to the first heat exchange channel as much as possible, thereby improving the comprehensiveness of heat exchange of the first heat exchange channel, and thus improving the heat exchange effect of the battery.

[0046] In some embodiments of the present application, the first heat exchange channel further includes: a third heat exchange section, the first heat exchange section is connected between the third heat exchange section and the second heat exchange section, and the third heat exchange section is connected to the first heat exchange section at an angle.

[0047] In the above technical solution, the heat exchange area of ​​the first heat exchange channel can be further increased by providing the third heat exchange section, thereby further improving the heat exchange effect of the first heat exchange channel.

[0048] In some embodiments of the present application, the first heat exchange section includes multiple first heat exchange parts, and the multiple first heat exchange parts are bent and connected in sequence in the first direction; the third heat exchange section is arranged on the side of the first heat exchange section away from the third heat exchange part, and the third heat exchange section is connected to the one of the multiple first heat exchange parts that is closest to the second heat exchange part along the first direction.

[0049] In the above technical solution, by adding a third heat exchange section and connecting the third heat exchange section to the one of the multiple first heat exchange sections that is closest to the second heat exchange section along the first direction, the heat exchange area can be increased, and the temperature difference of the battery assembly formed by multiple rows of battery cells can be balanced, thereby improving the temperature uniformity of the battery assembly.

[0050] In some embodiments of the present application, the third heat exchange section extends along the first direction toward a direction away from the second heat exchange portion, and the first heat exchange portion extends along the second direction, wherein the first direction and the second direction are arranged at an angle.

[0051] In the above technical solution, by setting the third heat exchange section to extend along the first direction away from the second heat exchange part, the heat exchange area of ​​the first heat exchange channel can be increased, and the heat exchange effect of the first heat exchange channel on the battery cell can be improved; at the same time, when the third heat exchange section and the fourth heat exchange part jointly exchange heat with the battery assembly, the temperature difference in the edge area of ​​the battery assembly can be balanced, thereby improving the temperature uniformity at the edge of the battery assembly.

[0052] In some embodiments of the present application, the third heat exchange section extends along the first direction to a position close to one of the plurality of first heat exchange parts that is farthest from the second heat exchange part.

[0053] In the above technical solution, by setting the third heat exchange section to extend along the first direction to a position close to the one farthest from the second heat exchange part among the multiple first heat exchange parts, the length of the third heat exchange part can be increased, the heat exchange area of ​​the third heat exchange part can be increased, and the heat exchange effect of the first heat exchange channel can be improved.

[0054] In some embodiments of the present application, the first heat exchange channel also includes: a first inlet and outlet section, one end of the first inlet and outlet section is connected to the third heat exchange section at an angle, and the other end of the first inlet and outlet section forms a first inlet and outlet of the first heat exchange channel; and the first inlet and outlet section extends along the second direction away from the first heat exchange section, and the third heat exchange section is extended along the first direction.

[0055] In the above technical solution, the provision of the first inlet and outlet section facilitates external piping, allowing heat exchange medium to enter or exit the first heat exchange channel. It also guides the heat exchange fluid entering or exiting the first heat exchange channel, allowing the heat exchange fluid to enter or exit quickly, thereby increasing the heat exchange rate. By extending the first inlet and outlet section along the second direction away from the first heat exchange section, the piping layout of the first heat exchange channel can be more rationalized and facilitated connection to external piping. Furthermore, the first inlet and outlet can be positioned away from the battery assembly, which helps reduce the risk of damage to the battery assembly due to leakage from the first inlet and outlet.

[0056] In some embodiments of the present application, the first heat exchange channel also includes: a second inlet and outlet section, one end of the second inlet and outlet section is connected to the fourth heat exchange part at an angle, and the other end of the second inlet and outlet section forms a second inlet and outlet of the first heat exchange channel; and the second inlet and outlet section extends along the second direction away from the first heat exchange section, and the fourth heat exchange part is extended along the first direction.

[0057] In the above technical solution, the provision of a second inlet and outlet section facilitates external piping, allowing heat exchange medium to enter or exit the first heat exchange channel, completing heat exchange for the battery cells. It also guides the heat exchange fluid entering or exiting the first heat exchange channel, allowing the heat exchange fluid to enter or exit quickly, thereby increasing the heat exchange rate. By providing the second inlet and outlet section to extend in a second direction away from the first heat exchange section, the piping layout of the first heat exchange channel can be more rationalized and facilitated connection to external piping. Furthermore, the second inlet and outlet can be positioned away from the battery assembly, which helps reduce the risk of damage to the battery assembly due to leakage at the second inlet and outlet.

[0058] In some embodiments of the present application, the first heat exchange element has one or more heat exchange channels. When the number of heat exchange channels is multiple, the multiple heat exchange channels are arranged at intervals along the first direction or arranged around each other, and at least one heat exchange channel forms a first heat exchange channel.

[0059] In the above-mentioned embodiment, by providing the first heat exchange element with one or more heat exchange channels, and the multiple heat exchange channels are arranged at intervals along the first direction or arranged around each other, the diversity of the heat exchange channels can be increased, thereby improving the adaptability of the first heat exchange element so that it can meet different battery requirements and thus improve the market competitiveness of the battery; at the same time, the multiple heat exchange channels are arranged in parallel, so that the multiple heat exchange channels can exchange heat at the same time, thereby reducing the heat exchange time of the first heat exchange element and improving the heat exchange efficiency.

[0060] In some embodiments of the present application, the plurality of heat exchange channels are symmetrically arranged about a center line of the first heat exchange element along a second direction, and the second direction is arranged at an angle to the first direction.

[0061] In the above embodiment, by arranging multiple heat exchange channels symmetrically about the center line of the first heat exchange element along the second direction, the multiple heat exchange channels can synchronously exchange heat with the battery assembly to improve the heat exchange efficiency. At the same time, it can also improve the temperature consistency of the two symmetrically arranged heat exchange areas of the battery assembly and the first heat exchange element, thereby further enhancing the temperature uniformity effect of the battery assembly.

[0062] In some embodiments of the present application, the first heat exchange member includes: a first pipe portion, the inlet end of the first pipe portion is formed as a first inlet and outlet of the heat exchange channel; a second pipe portion, the outlet end of the second pipe portion is formed as a second inlet and outlet of the heat exchange channel; a mounting member, the mounting member is configured to be sealed and connected to the box body, and a through hole is formed on the mounting member to connect the spaces on both sides of the mounting member, and the first pipe portion and / or the second pipe portion pass through the through hole and are sealed and connected to the through hole.

[0063] In the above technical solution, after the mounting member is sealed with the first tube portion and the second tube portion, the mounting member is then sealed with the box body. This not only increases the structural strength at the position of the first tube portion and the second tube portion, but also reduces the labor and materials required for sealing. As a result, the production rate of the battery can be increased and the labor cost of producing the battery can be reduced.

[0064] In some embodiments of the present application, the battery further comprises a protective plate, which is arranged on a side of the first heat exchanger away from the casing, and the outer peripheral surface of the protective plate is sealedly connected to the casing, and together form a third cavity for accommodating the first heat exchanger; the mounting member has a cavity with an opening on one side, and a through hole passes through the bottom wall of the cavity opposite to the opening, the mounting member is suitable for being arranged between the casing and the protective plate, and the outer peripheral surface of the mounting member is suitable for being sealedly connected to the casing and the protective plate.

[0065] In the above embodiment, by setting the mounting member as a cavity with an opening on one side, the overall weight of the mounting member can be reduced, and thus the overall weight of the entire battery can be reduced, which is beneficial to the lightweighting of the battery; at the same time, the mounting member is suitable for being set between the box body and the guard plate, so that the bottom of the box body can isolate the first heat exchange member and multiple battery cells, thereby, when the first heat exchange member is damaged, it will not affect the multiple battery cells, thereby reducing the cost of battery maintenance.

[0066] In some embodiments of the present application, the battery further includes a protective plate, which is arranged on a side of the first heat exchanger away from the box body, and the outer peripheral surface of the protective plate is sealed with the box body, and together they form a third cavity for accommodating the first heat exchanger; the battery further includes a filler, which is filled in the gap between the first heat exchanger and the third cavity.

[0067] In the above technical solution, by setting the protective plate on the side of the first heat exchanger away from the housing, the first heat exchanger can be protected and the probability of the first heat exchanger being impacted can be reduced. The filler can separate the first heat exchanger and the protective plate, and play a buffering role when the protective plate is impacted, reducing the damage to the first heat exchanger when the protective plate is impacted, thereby improving the reliability of the first heat exchanger. Moreover, by setting the filler to fill the gap between the first heat exchanger and the third cavity, the filler can act on the first heat exchanger, the housing and the protective plate, making the installation of the first heat exchanger in the third cavity more secure, reducing the probability of the first heat exchanger being displaced in the third cavity, and improving the stability of the first heat exchanger. Secondly, the filler can also play a role in heat preservation, reducing the probability of heat exchange between the first heat exchanger and the protective plate and the external environment, so that the first heat exchanger can concentrate on heat exchange with the battery cells in the accommodating cavity, which is beneficial to improving the heat exchange effect.

[0068] In some embodiments of the present application, the filler is a filling layer and is provided on the protective plate. The filling layer has a first top surface close to one side of the box body. The first heat exchanger has a second top surface close to one side of the box body. The height of the second top surface relative to the protective plate is greater than the height of the first top surface relative to the protective plate. The battery also includes an adhesive, which is provided on the first top surface and the second top surface.

[0069] In the above technical solution, the second top surface of the first heat exchanger is protruding relative to the first top surface of the filling layer. As a result, the gap between the first top surface and the wall of the casing is larger than the gap between the second top surface and the wall of the casing. The thickness of the filling layer is greater than the thickness of the first heat exchanger. The thicker the filling layer, the better the connection reliability between the filling layer and the casing, thereby improving the installation reliability of the first heat exchanger. The thinner the thickness of the first heat exchanger, on the one hand, can improve the connection reliability between the first heat exchanger and the casing, and on the other hand, can reduce the obstruction to the heat exchange of the first heat exchanger, thereby improving the heat exchange effect of the first heat exchanger on the battery cells in the casing, thereby facilitating the improvement of the heat exchange efficiency of the first heat exchanger.

[0070] In some embodiments of the present application, the box body is an integral stamped part and includes a bottom wall and a surrounding wall.

[0071] In the above technical solution, by configuring the housing as an integral stamped part, the bottom and sides of the housing are closed, providing a high degree of sealing. After the first heat exchanger is attached to the outside of the housing, the sealing requirements for the housing can be reduced, which helps simplify the battery assembly process and reduce the manufacturing cost of the battery. Furthermore, the housing is an integral stamped part, which gives it a relatively high structural strength and a low probability of deformation and impact damage, which helps improve the reliability of the battery. Furthermore, since the housing is an integral stamped part, it has a relatively small wall thickness while maintaining high strength, which can reduce the weight of the housing and increase the volumetric energy density of the battery.

[0072] In some embodiments of the present application, the first heat exchange element includes a plurality of flat-mouth tubes connected in series, and a heat exchange channel is formed on the inner wall of each flat-mouth tube.

[0073] In the above technical solution, since the housing is a one-piece stamped part, configuring the first heat exchange element to include multiple flat-end tubes allows for a more compact layout of the first heat exchange element and the housing, resulting in more efficient space utilization. This helps reduce the battery's size and increase its volumetric energy density. Furthermore, the flat-end tubes have good compressive strength, can withstand certain pressures and loads, and provide excellent pipe protection and structural support, thereby improving the reliability of the first heat exchange element.

[0074] In some embodiments of the present application, the flat-mouth tube comprises one of a bent aluminum alloy tube, an aluminum alloy harmonica cold tube, an aluminum alloy stamped cold plate, and an aluminum alloy brazed cold plate. In this technical solution, by configuring the flat-mouth tube to comprise one of the bent aluminum alloy tube, the aluminum alloy harmonica cold tube, the aluminum alloy stamped cold plate, and the aluminum alloy brazed cold plate, a variety of structures can be provided for the flat-mouth tube design, thereby increasing design flexibility and reducing manufacturing difficulty.

[0075] In some embodiments of the present application, the battery further includes a second heat exchange element, which is disposed in the accommodating cavity and is fitted onto at least one inner wall surface of the box body; wherein the structure of the second heat exchange element is the same as or different from that of the first heat exchange element.

[0076] In the above technical solution, the battery can not only exchange heat with one side of the battery cell in the box through the first heat exchange element, but also exchange heat with the other side of the battery cell in the box through the second heat exchange element. That is to say, the second heat exchange element and the first heat exchange element can cooperate with each other to exchange heat with the battery cell, thereby being able to exchange heat on more sides of the battery cell, increasing the heat exchange surface of the battery cell, which is beneficial to improving the heat exchange efficiency and greatly enhancing the heat exchange effect.

[0077] In some embodiments of the present application, the battery further includes a third heat exchange element, which is disposed in the accommodating cavity and is used to be arranged between two adjacent battery cells; wherein the structure of the third heat exchange element is the same as or different from that of the first heat exchange element.

[0078] In this technical solution, the first heat exchange element can perform heat exchange on the side surfaces of multiple battery cells in the box body located on the same side, while the third heat exchange element can perform heat exchange on the other side surface between two adjacent battery cells. As a result, the third heat exchange element and the first heat exchange element cooperate with each other to perform heat exchange on the two surfaces of the battery cells, thereby being able to perform heat exchange on more sides of the battery cells, increasing the heat exchange surface of the battery cells, which is beneficial to improving the heat exchange efficiency and greatly enhancing the heat exchange effect.

[0079] In some embodiments of the present application, the first heat exchange element includes a first heat exchange channel, the first heat exchange channel includes a plurality of heat exchange parts, the plurality of heat exchange parts are arranged at intervals along the first direction and are connected in sequence, each heat exchange part extends straightly along the second direction, and the second direction and the first direction are arranged at an angle; the battery includes at least one row of battery cells, each row of battery cells is arranged in sequence along the second direction, and the side of the battery cell close to the first heat exchange element corresponds to at least two heat exchange parts.

[0080] In the above technical solution, at least two heat exchange parts correspond to the side of the battery cell close to the first heat exchange element, thereby increasing the heat exchange area between the battery cell and the first heat exchange element, and quickly adjusting the temperature of the battery cell, thereby improving the heat exchange efficiency of the battery cell. The temperature adjustment of the battery cell is faster, which can enhance the heat exchange effect of the battery cell and thus improve the reliability of the battery.

[0081] In a second aspect, an embodiment of the present application further provides an electrical device comprising the battery described above.

[0082] In the above technical solution, the battery has excellent sealing and insulation properties, resulting in high reliability. Therefore, the electrical device using this battery has high power reliability. Moreover, since the battery can eliminate most of the sealing and insulation structures of the box, it can effectively reduce the overall manufacturing cost of the battery and increase the volumetric energy density of the battery. Therefore, it can reduce the production cost of the electrical device and help extend the power supply life. BRIEF DESCRIPTION OF THE DRAWINGS

[0083] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0084] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0085] FIG2 is an exploded view of a battery provided in some embodiments of the present application;

[0086] FIG3 is a first perspective structural diagram of a battery structure according to some embodiments of the present application;

[0087] FIG4 is an exploded view of a battery provided in some embodiments of the present application;

[0088] FIG5 is a first schematic diagram of the internal structure of a battery provided in some embodiments of the present application;

[0089] FIG6 is a second exploded view of a battery provided in some embodiments of the present application;

[0090] FIG7 is a second schematic diagram of the three-dimensional structure of a battery provided in some embodiments of the present application;

[0091] FIG8 is an enlarged schematic diagram of a partial structure of FIG7 ;

[0092] FIG9 is a top view of a partial structure of a battery provided by some embodiments of the present application;

[0093] FIG10 is a schematic diagram of FIG9 taken along line AA;

[0094] FIG11 is a partial enlarged schematic diagram of point I in FIG10;

[0095] FIG12 is a schematic diagram showing the position distribution of a first heat exchange element and multiple rows of battery cells provided in some embodiments of the present application;

[0096] FIG13 is a first schematic diagram of the three-dimensional structure of a first heat exchange element provided in some embodiments of the present application;

[0097] FIG14 is a schematic diagram of the local structure of point II in FIG13;

[0098] FIG15 is a second schematic diagram of the three-dimensional structure of the first heat exchange element provided in some embodiments of the present application;

[0099] FIG16 is a schematic diagram of a partial structure of FIG15;

[0100] FIG17 is a schematic diagram of the assembly of the guard plate and the first heat exchange element provided in some embodiments of the present application;

[0101] FIG18 is a partial enlarged schematic diagram of point III in FIG17;

[0102] FIG19 is a third exploded view of a battery provided in some embodiments of the present application;

[0103] FIG20 is a second schematic diagram of the internal structure of a battery provided in some embodiments of the present application;

[0104] FIG21 is a partial enlarged schematic diagram of point IV in FIG20;

[0105] FIG22 is a schematic diagram of the structure of a battery provided in some embodiments of the present application;

[0106] FIG23 is a second exploded view of a battery provided in some embodiments of the present application.

[0107] Icons: 1000, vehicle; 1, battery; 100, first heat exchange element; 100a, heat exchange area; 100b, second top surface; 100d, edge; 10, first heat exchange channel; 11, first heat exchange section; 111, first heat exchange part; 112, first bend; 12, second heat exchange section; 120, U-shaped area; 121, second heat exchange part; 122, third heat exchange part; 123, second bend; 124, third bend; 125, fourth heat exchange part; 12 6. Sixth bend; 13. Third heat exchange section; 14. Fourth bend; 15. First inlet / outlet section; 17. Second inlet / outlet section; 18. Seventh bend; 193. Mounting member; 191. First tube section; 192. Second tube section; 193. Mounting member; 1931. First plate; 1932. Second plate; 1933. Mounting plate; 1933a. Through hole; 1934. Stopper; 1934a. Inclined surface; 20. Current collector; 200, box body; 101a, third cavity; 1011, first box body; 1012, second box body; 21, accommodating cavity; 21a, first cavity; 21b, second cavity; 22, box body; 23, bottom plate; 24, top plate; 25, fixing part; 27, guard plate; 28, filler; 28a, first top surface; 28b, mounting groove; 29, adhesive; 200b, bottom wall; 200c, surrounding wall; 2011, first box wall; 2011a, first groove; 2012, protrusion; 102, battery cell; 103, beam body; 103a, second groove; 300, second heat exchanger; 400, third heat exchanger; 2, controller; 3, motor; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0108] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0109] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0110] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0111] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0112] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0113] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0114] The term "plurality" used in this application refers to two or more (including two).

[0115] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or battery pack. A battery generally includes a casing that encloses one or more battery cells or multiple battery modules. The casing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0116] In this application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application do not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this.

[0117] A battery cell includes a casing, an electrode assembly, and an electrolyte. The casing is used to hold the electrode assembly and the electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as the positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet consists of a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. The negative current collector uncoated with the negative active material layer protrudes from the negative current collector coated with the negative active material layer. The negative current collector uncoated with the negative active material layer serves as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon, silicon, or other materials. To ensure that high currents can pass without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together.

[0118] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a wound structure or a laminated structure, but the embodiments of the present application are not limited thereto.

[0119] New energy vehicles have experienced rapid growth in recent years. Within the electric vehicle sector, power batteries, as the power source, play an irreplaceable and crucial role. A battery consists of a housing and multiple cells contained within it. As a core component of new energy vehicles, batteries are subject to stringent requirements for both safety and longevity. To ensure battery life, existing technologies integrate cold plates within the housing to cool the batteries. However, associated sealing and leakage issues with the cold plates hinder further improvements in battery reliability and lifespan.

[0120] In general batteries, to achieve better thermal management and reduce production costs, the housing can be composed of two parts: a frame and a cold plate. The cold plate is integrated with the frame and serves as the wall of the housing. This allows the cold plate to be in direct contact with the battery cells, improving the heat exchange effect of the battery, better regulating the battery temperature, and reducing the cost of the housing. However, because the cold plate serves as the wall of the housing, the sealing between the cold plate and the frame must be relatively high, resulting in a high probability of sealing failure. In addition, the connection between the frame and the cold plate also has reliability issues, which can affect the structural strength of the housing and, in turn, the reliability of the battery.

[0121] Based on the above considerations, and in order to address the problems in related art of battery casings, such as difficulty in sealing, easy failure of sealing, and poor structural strength of the casing, which affect battery reliability, this application proposes a battery comprising: a casing having a receiving cavity; and a first heat exchanger disposed on the outer side of the casing wall facing away from the receiving cavity, for heat exchange with the battery cells.

[0122] In a battery of this structure, on the one hand, because the first heat exchanger is fitted against the wall of the case, away from the outside of the accommodating cavity, the requirements for the sealing and insulation properties of the side of the case close to the first heat exchanger are reduced, thereby reducing the probability of leakage of the first heat exchanger causing a safety hazard to the battery, improving the reliability of the battery. Moreover, since most of the sealing and insulation structures are eliminated, the manufacturing cost of the battery can be reduced and the volumetric energy density of the battery can be increased. On the other hand, the case directly bears the weight of the battery cell, and the first heat exchanger is not in direct contact with the battery cell and does not directly bear the task of supporting the battery cell. Therefore, the first heat exchanger bears less load and force, which can improve the reliability of the first heat exchanger, thereby further improving the reliability of the battery. In addition, the first heat exchanger is located on the outside of the case, which can protect the bottom wall of the case, improve the reliability of the case, and further improve the reliability of the battery.

[0123] The batteries disclosed in the embodiments of this application can be used, but are not limited to, in electronic devices, power equipment, vehicles, and industrial equipment. For example, electronic devices may include, but are not limited to, computers, servers, and televisions; power equipment may include, but are not limited to, generators, transformers, and batteries; and industrial equipment may include, but are not limited to, machining equipment, metallurgical equipment, and chemical equipment. This helps expand the battery's scope of application.

[0124] The present invention provides an electric device that uses a battery as a power source. The electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0125] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0126] Please refer to Figure 1, which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 1 is provided inside the vehicle 1000, and the battery 1 can be provided at the bottom, head or tail of the vehicle 1000. The battery 1 can be used to power the vehicle 1000. For example, the battery 1 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 2 and a motor 3. The controller 2 is used to control the battery 1 to power the motor 3, for example, for starting, navigating and driving the vehicle 1000.

[0127] In some embodiments of the present application, the battery 1 can serve not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0128] Please refer to Figure 2, which is an exploded view of the structure of the battery 1 provided in some embodiments of the present application. The battery 1 includes a housing 200 and a plurality of battery cells 102, which are used to be accommodated in the housing 200. The housing 200 is used to provide an assembly space for the battery cells 102, and the housing 200 can adopt a variety of structures. In some embodiments, the housing 200 can include a first housing body 1011 and a second housing body 1012, which cover each other and together define an assembly space for accommodating the battery cells 102. The second box body 1012 can be a hollow structure with one end open, and the first box body 1011 can be a plate-like structure, with the first box body 1011 covering the open side of the second box body 1012, so that the first box body 1011 and the second box body 1012 jointly define an assembly space; the first box body 1011 and the second box body 1012 can also be hollow structures with one side open, with the open side of the first box body 1011 covering the open side of the second box body 1012. Of course, the box body 101 formed by the first box body 1011 and the second box body 1012 can be of various shapes, such as a cylinder, a cuboid, etc.

[0129] In the battery 1, multiple battery cells 102 can be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel connections among the multiple battery cells 102. Multiple battery cells 102 can be directly connected in series, in parallel, or in a hybrid configuration, and then the entire structure of the multiple battery cells 102 is housed within the housing 101. Alternatively, the battery 1 can be constructed by first connecting multiple battery cells 102 in series, in parallel, or in a hybrid configuration to form a battery module. The multiple battery modules are then connected in series, in parallel, or in a hybrid configuration to form a single structure, which is then housed within the housing 101. The battery 1 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 102.

[0130] Please refer to Figure 2, which is a schematic diagram of a partial structure of a battery 1 provided in some embodiments of the present application. Battery 1 includes multiple rows of battery cells 102, which are arranged along the length of a housing 101, with each row of battery cells 102 including multiple battery cells 102 arranged along the width of the housing 101; alternatively, multiple rows of battery cells 102 are arranged along the width of the housing 101, with each row of battery cells 102 including multiple battery cells 102 arranged along the length of the housing 101.

[0131] Each battery cell 102 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 102 can be cylindrical, flat, rectangular, or in other shapes. For example, in FIG2 , the battery cell 102 is in the shape of a rectangular parallelepiped.

[0132] First, referring to Figure 3, which is a schematic diagram of the three-dimensional structure of a battery 1 provided in an embodiment of the present application, the present application provides a battery 1 comprising: a housing 200 having a receiving cavity 21 and a first heat exchanger 100; the first heat exchanger 100 is disposed on the outer side of the housing 200, facing away from the receiving cavity 21, for heat exchange with a battery cell 102.

[0133] The housing 200 may be the outer shell of the battery 1, containing a space for accommodating the battery cells 102 and providing protection and support. The housing 200 may generally be made of a hard material (including but not limited to metal, plastic, and wood) with appropriate strength and stability to withstand the weight of an object and external pressure.

[0134] The accommodating cavity 21 may refer to a space formed inside the box body 200 for accommodating the battery cell 102 .

[0135] The first heat exchange element 100 may refer to a device or component used to transfer heat during a heat exchange process. The first heat exchange element 100 is typically used to transfer heat from one medium to another, thereby achieving heat transfer and utilization. For example, the first heat exchange element 100 may be, but is not limited to, a radiator, a cold plate, or a cold pipe.

[0136] In the above solution, the first heat exchanger 100 is fitted on the outer side of the wall of the box body 200 away from the accommodating chamber 21. It can be understood that the first heat exchanger 100 is arranged on the outer side of the box body 200, and the first heat exchanger 100 can be fitted on any one of the top wall, bottom wall and peripheral wall of the box body 200. The peripheral wall can refer to a plurality of side walls that surround the peripheral wall of the box body 200. The number of side walls can be but is not limited to three, four, five, etc. For example, when the box body 200 is a rectangular parallelepiped, the peripheral wall can include four side walls. The first heat exchanger 100 can be fitted on one or more side walls. For example, with reference to Figures 3 and 4, the first heat exchanger 100 can be fitted on the outer side of the bottom wall of the box body 200.

[0137] In the above solution, since the first heat exchange element 100 is disposed outside the housing 200, it does not come into direct contact with the battery cells 102 within the accommodating cavity 21. The walls of the housing 200 can separate the first heat exchange element 100 from the battery cells 102. This eliminates the need for most of the sealing and insulating structures on the side of the housing 200 near the first heat exchange element 100, thereby reducing the sealing and insulation requirements of the housing 200, simplifying the manufacturing process of the battery 1, and thereby reducing the cost of the battery 1. Furthermore, the first heat exchange element 100 exchanges heat with the battery cells 102 within the accommodating cavity 21 through the walls of the housing 200. This reduces the probability of the heat exchange fluid from the first heat exchange element 100 leaking into the accommodating cavity 21, thereby improving the reliability of the battery 1.

[0138] On the other hand, since the first heat exchanger 100 is located on the outside of the box body 200, the load and force generated by the battery cell 102 mainly act on the wall of the box body 200, and the first heat exchanger 100 is not in direct contact with the battery cell 102. Therefore, the first heat exchanger 100 can withstand relatively small loads and forces, which can reduce the probability of damage to the first heat exchanger 100 and improve the reliability of the first heat exchanger 100, which is beneficial to the first heat exchanger 100 to perform stable and reliable heat exchange on the battery 1, thereby improving the reliability of the battery 1. Moreover, the first heat exchange component 100 is located on the outside of the box body 200, which can separate the bottom wall of the box body 200 from the external environment. When the bottom of the box body 200 is impacted, the first heat exchange component 100 can play a protective role and withstand the impact before the bottom wall of the box body 200, thereby reducing the impact force on the bottom wall of the box body 200, and can reduce the probability of damage and rupture of the bottom wall of the box body 200, thereby reducing the probability of damage to the battery cell 102 in the box body 200 by impact, thereby further improving the reliability of the battery 1.

[0139] In the above technical solution, on the one hand, because the first heat exchange element 100 is positioned against the wall of the housing 200, facing away from the outer side of the accommodating cavity 21, the sealing and insulation requirements on the side of the housing 200 closest to the first heat exchange element 100 are reduced. This reduces the probability of leakage from the first heat exchange element 100 causing safety hazards to the battery 1, thereby improving the reliability of the battery 1. Furthermore, since most sealing and insulation structures are eliminated, the manufacturing cost of the battery 1 is reduced and the volumetric energy density of the battery is increased. On the other hand, the housing 200 directly bears the weight of the battery cells 102, while the first heat exchange element 100 does not directly contact the battery cells 102 and does not directly support the battery cells 102. Therefore, the load and force borne by the first heat exchange element 100 are relatively small, which improves the reliability of the first heat exchange element 100 and further improves the reliability of the battery 1. Furthermore, the first heat exchange element 100 is located outside the housing 200, protecting the bottom wall of the housing, improving the reliability of the housing 200 and further improving the reliability of the battery 1.

[0140] In some embodiments of the present application, referring to Figures 3 and 4, the accommodating cavity 21 includes a first cavity 21a, the first cavity 21a is used to accommodate the battery cell 102, the first heat exchange element 100 has a heat exchange area 100a for heat exchange, and the area of ​​the projection contour of the orthographic projection of the heat exchange area 100a on the side of the box body 200 close to the first heat exchange element 100 is greater than or equal to the projection surface area of ​​the orthographic projection of the first cavity 21a on the side of the box body 200 close to the first heat exchange element 100, and is smaller than the area of ​​the side of the box body 200 close to the first heat exchange element 100.

[0141] The first cavity 21a may refer to the portion of space within the accommodating cavity 21 used to accommodate the battery cells 102. The first cavity 21a may be used to accommodate one or more battery cells 102. When there are multiple battery cells 102, the battery cells 102 may be arranged in one or more rows within the first cavity 21a, with each row containing multiple battery cells 102. For example, referring to FIG6 , the battery cells 102 may be arranged in multiple rows along the second direction Y within the first cavity 21a, with each row containing three battery cells 102 along the first direction X.

[0142] The heat exchange region 100a may refer to the specific surface area within the first heat exchange element 100 where heat transfer occurs during the heat exchange process. It is a specific portion designed and arranged on the first heat exchange element 100. The first heat exchange element 100 can exchange heat with the battery cells 102 within the first cavity 21a through the heat exchange region 100a, thereby achieving a heat exchange effect. For example, when the first heat exchange element 100 is a cold plate, the heat exchange region 100a may refer to the area of ​​the cold plate formed by the cold plate surface corresponding to the battery cells 102 within the first cavity 21a. When the first heat exchange element 100 is a cold pipe, the heat exchange region 100a may refer to the pipe portion of the cold pipe corresponding to all battery cells 102.

[0143] In the above example, the area of ​​the projected contour of the heat exchange region 100a as an orthographic projection on the side of the housing 200 close to the first heat exchange element 100 may be greater than the area of ​​the projected surface of the first cavity 21a as an orthographic projection on the side of the housing 200 close to the first heat exchange element 100, and smaller than the area of ​​the side of the housing 200 close to the first heat exchange element 100. Alternatively, the area of ​​the projected contour of the heat exchange region 100a as an orthographic projection on the side of the housing 200 close to the first heat exchange element 100 may be equal to the area of ​​the projected surface of the first cavity 21a as an orthographic projection on the side of the housing 200 close to the first heat exchange element 100, and smaller than the area of ​​the side of the housing 200 close to the first heat exchange element 100.

[0144] In the above technical solution, the heat exchange area 100a can cover the area where the first cavity 21a is located, but will not exceed the side area of ​​the corresponding box body 200. In this way, the size of the heat exchange area 100a will not be too large under the premise of exchanging heat with the battery cell 102 in the first cavity 21a, which is conducive to reducing the size of the first heat exchange component 100, thereby reducing the material used for the first heat exchange component 100, further reducing the manufacturing cost of the battery 1, and reducing the weight of the box body 200, thereby improving the volume energy density of the battery 1. Moreover, the area of ​​the projection outline of the positive projection of the heat exchange area 100a on the side of the box body 200 close to the first heat exchange element 100 is smaller than the area of ​​the side of the box body 200 close to the first heat exchange element 100, which can also reduce the probability of the heat exchange area 100a coming into contact with other areas of the box body 200 that do not require heat exchange, and reduce the influence of other parts of the wall of the box body 200 except for the corresponding first cavity 21a on the battery cell 102, so that the heat exchange area 100a can concentrate on heat exchange in the area where the first cavity 21a is located, which is beneficial to improving the heat exchange efficiency in the area where the first cavity 21a is located, thereby improving the reliability of the battery 1.

[0145] In some embodiments of the present application, referring to Figures 3 and 4, the accommodating cavity 21 includes a second cavity 21b for accommodating electrical components, and the orthographic projection of the second cavity 21b on the side of the box body 200 close to the first heat exchange element 100 is located outside the orthographic projection of the heat exchange area 100a on the side of the box body 200 close to the first heat exchange element 100.

[0146] The second cavity 21b may refer to a portion of the accommodating cavity 21 for accommodating electrical components. The aforementioned electrical components may include, but are not limited to, a battery management system (BMS), a high-voltage disconnection system (BDU), a current sensing element, a temperature detection element, and the like.

[0147] In the above technical solution, the orthographic projection of the second cavity 21b on the side of the housing 200 close to the first heat exchange element 100 is located outside the orthographic projection of the heat exchange area 100a on the side of the housing 200 close to the first heat exchange element 100, so that the heat exchange area 100a does not need to cover the area where the second cavity 21b accommodating the electrical components is located, thereby effectively reducing the size of the heat exchange area 100a, which is beneficial to further reduce the size of the first heat exchange element 100, reduce the material used in the first heat exchange element 100, and reduce the manufacturing cost of the first heat exchange element 100, so as to further reduce the manufacturing cost of the battery 1, and also help to reduce the weight of the housing 200.

[0148] In some embodiments of the present application, referring to Figures 4 and 6, the box body 200 includes a box body 22, a bottom plate 23 and a top plate 24, the bottom plate 23 and the top plate 24 are connected to the box body 22, and the first heat exchange element 100 is arranged on the outside of the bottom plate 23 and / or the outside of the top plate 24.

[0149] The box body 22 may refer to the main body of the box body 200, or may refer to a frame structure with open ends. The box body 22 may include, but is not limited to, a frame structure and a shell structure formed by a plurality of panels.

[0150] The bottom plate 23 may refer to a plate disposed at the bottom of the box body 200 , and is used to close the bottom opening of the box body 22 .

[0151] The top plate 24 may refer to a plate disposed on the top of the box body 200 , and is used to close the top opening of the box body 22 .

[0152] In the above embodiment, there can be only one first heat exchange element 100, which can be attached to the outside of the bottom plate 23; alternatively, the first heat exchange element 100 can be attached to the outside of the top plate 24. There can also be multiple first heat exchange elements 100, one of which can be attached to the outside of the bottom plate 23, and another attached to the outside of the top plate 24.

[0153] In the above technical solution, the area of ​​the bottom plate 23 and the top plate 24 is larger than the area of ​​the side of the box body 22, and there are more battery cells 102 in contact with the first cavity 21a. By fitting the first heat exchange element 100 on the outer side of the bottom plate 23 and / or the outer side of the top plate 24, the first heat exchange element 100 can exchange heat with more battery cells 102 and have a larger heat exchange surface, so as to better regulate the overall temperature of the battery 1, improve the heat exchange efficiency, and improve the uniformity of heat exchange.

[0154] In some embodiments of the present application, the box body 22 , the bottom plate 23 and the top plate 24 are made of steel or aluminum.

[0155] In the above technical solution, steel parts are relatively strong and relatively cheap. By setting the box body 22, bottom plate 23 and top plate 24 as steel parts, the box body 200 can have relatively high structural strength while also reducing the cost of the box body 200, thereby further reducing the manufacturing cost of the box body 200 and the battery 1. Aluminum parts have the advantages of light weight, good thermal conductivity and corrosion resistance. Therefore, setting the box body 22, bottom plate 23 and top plate 24 as aluminum parts can make the box body 22, bottom plate 23 and top plate 24 relatively light, which can reduce the difficulty of assembly, improve work efficiency, and reduce the overall weight of the box body 200. It can also better transfer the heat in the first cavity 21a to the first heat exchange element 100, which is conducive to improving heat exchange efficiency and heat exchange effect, and is conducive to reducing chemical corrosion of the box body 200 and extending the service life of the battery 1. In addition, when the box body 22, the bottom plate 23 and the top plate 24 are made of aluminum, they can be conveniently formed by integral stamping, which can save manufacturing costs and improve manufacturing efficiency.

[0156] In some embodiments of the present application, when the box body 22 , the bottom plate 23 and the top plate 24 are made of steel, the thickness of the box body 22 is 0.8 mm to 2.0 mm.

[0157] That is to say, the thickness of the box body 22 can be, but is not limited to, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, etc.

[0158] When the housing 22, bottom plate 23, and top plate 24 are made of steel, if the thickness of the housing 22 is less than 0.8 mm, the strength of the housing 22 is relatively poor, affecting the strength of the housing 200. The housing 200 is more likely to be damaged, which in turn increases the probability of damage to the battery cells 102 inside the housing 200, thereby affecting the reliability of the battery 1. If the thickness of the housing 22 is greater than 2.0 mm, the housing 22 has high strength but is also thick, which increases the weight of the housing 22 and, in turn, the weight of the housing 200, which is not conducive to improving the energy density of the battery 1.

[0159] In the above technical solution, by making the box body 22, the bottom plate 23 and the top plate 24 into steel parts, and setting the thickness of the box body 22 to be in the range of 0.8mm to 2.0mm, the box body 22 can have a relatively high strength, which is beneficial to improve the strength of the box body 200, thereby helping to improve the overall reliability of the battery 1, and can also make the weight of the box body 22 appropriate, so that the box body 22 can have a lighter weight, which is beneficial to reducing the weight of the box body 200 and improving the energy density of the battery 1.

[0160] In some embodiments of the present application, the thickness of the bottom plate 23 and the top plate 24 is 0.4 mm to 1.2 mm.

[0161] That is, the thickness of the bottom plate 23 and the top plate 24 may be, but is not limited to, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, and the like.

[0162] When the housing 22, bottom plate 23, and top plate 24 are made of steel, if the thickness of the bottom plate 23 and top plate 24 is less than 0.4 mm, the strength of the bottom plate 23 and top plate 24 is relatively poor, affecting the strength of the housing 200. The housing 200 is more likely to be damaged, which in turn increases the probability of damage to the battery cells 102 inside the housing 200, thereby affecting the reliability of the battery 1. If the thickness of the bottom plate 23 and top plate 24 is greater than 1.5 mm, the bottom plate 23 and top plate 24 have high strength but are relatively thick, which increases the weight of the bottom plate 23 and top plate 24, and thus increases the weight of the housing 200, which is not conducive to improving the energy density of the battery 1.

[0163] In the above technical solution, when the box body 22, the bottom plate 23 and the top plate 24 are made of steel, the thickness of the bottom plate 23 and the top plate 24 is set to be in the range of 0.4mm to 1.2mm, so that the bottom plate 23 and the top plate 24 can have relatively high strength, which is beneficial to improve the strength of the box body 200, thereby helping to improve the overall reliability of the battery 1, and can also make the weight of the bottom plate 23 and the top plate 24 appropriate, so that the bottom plate 23 and the top plate 24 can have a lighter weight, which is beneficial to reducing the weight of the box body 200 and improving the energy density of the battery 1.

[0164] In some embodiments of the present application, when the box body 22 , the bottom plate 23 and the top plate 24 are made of aluminum, the thickness of the box body 22 is 1.0 mm to 5.0 mm.

[0165] Aluminum is weaker than steel but lighter, so the box body 22, bottom plate 23, and top plate 24 are made of aluminum, and the thickness of the box body 22 is greater than when made of steel. When the box body 22, bottom plate 23, and top plate 24 are made of aluminum, the thickness of the box body 22 can be, but is not limited to, 1.0 mm, 1.2 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.8 mm, 2.0 mm, 2.2 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.8 mm, 3.0 mm, 3.2 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.8 mm, 4.0 mm, 4.2 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.8 mm, 5.0 mm, etc.

[0166] It can be understood that when the box body 22, bottom plate 23, and top plate 24 are made of aluminum, if the thickness of the box body 22 is less than 1.0 mm, the strength of the box body 22 is relatively poor, affecting the strength of the box body 2001, and the probability of damage to the box body 200 is relatively high, which increases the probability of damage to the battery cells 102 inside the box body 200, thereby affecting the reliability of the battery 1. If the thickness of the box body 22 is greater than 5.0 mm, the box body 22 has high strength but is also relatively thick, which increases the weight of the box body 22 and, in turn, the weight of the box body 200, which is not conducive to improving the energy density of the battery 1.

[0167] In the above technical solution, by making the box body 22, the bottom plate 23 and the top plate 24 of aluminum parts, and setting the thickness of the box body 22 to be in the range of 1.0mm to 5.0mm, the box body 22 can have a relatively high strength, which is beneficial to improving the strength of the box body 200, thereby helping to improve the overall reliability of the battery 1, and can also make the weight of the box body 22 appropriate, so that the box body 22 can have a lighter weight, which is beneficial to reducing the weight of the box body 200 and improving the energy density of the battery 1.

[0168] In some embodiments of the present application, the thickness of the bottom plate 23 and the top plate 24 is 1.0 mm to 3.0 mm.

[0169] When the housing 22, bottom plate 23, and top plate 24 are made of aluminum, if the thickness of the bottom plate 23 and top plate 24 is less than 1.0 mm, the strength of the bottom plate 23 and top plate 24 is relatively poor, affecting the strength of the housing 200. The housing 200 is more likely to be damaged, which in turn increases the probability of damage to the battery cells 102 inside the housing 200, thereby affecting the reliability of the battery 1. If the thickness of the bottom plate 23 and top plate 24 is greater than 3.0 mm, the bottom plate 23 and top plate 24 have high strength but are relatively thick, which increases the weight of the bottom plate 23 and top plate 24, and thus increases the weight of the housing 200, which is not conducive to improving the energy density of the battery 1.

[0170] In the above technical solution, when the box body 22, the bottom plate 23 and the top plate 24 are made of aluminum, the thickness of the bottom plate 23 and the top plate 24 is set to be in the range of 1.0 mm to 3.0 mm, so that the bottom plate 23 and the top plate 24 can have relatively high strength, which is beneficial to improve the strength of the box body 200, thereby helping to improve the overall reliability of the battery 1, and can also make the weight of the bottom plate 23 and the top plate 24 appropriate, so that the bottom plate 23 and the top plate 24 can have a lighter weight, which is beneficial to reducing the weight of the box body 200 and improving the energy density of the battery 1.

[0171] In some embodiments of the present application, the bottom plate 23 and the top plate 24 are both welded to the box body 22. In this technical solution, the bottom plate 23 and the top plate 24 are welded to the box body 22. On the one hand, compared with the glue coating and fastener connection method, the cost is relatively low, which can save costs. On the other hand, the connection reliability of the welding method is better, which can improve the connection strength of the bottom plate 23 and the top plate 24 to the box body 22, thereby improving the reliability of the entire box body 200.

[0172] In some embodiments of the present application, referring to Figure 7, the battery 1 also includes a fixing member 25, which is provided on the box body 200. The fixing member 25 is arranged near at least one edge 100d of the first heat exchange member 100 and is fastened to connect the first heat exchange member 100 and the box body 200.

[0173] The fixing member 25 may be a part, component, or device used to connect the first heat exchange element 100 and the housing 200. The fixing member 25 may be, but is not limited to, a mounting bracket or a hook. The fixing member 25 may be connected to the housing 200 by, but is not limited to, welding, gluing, riveting, or snap-fit ​​connection.

[0174] For example, when the fixing member 25 is a mounting bracket, the first heat exchanger 100 can be fixed to the mounting bracket by bolt connection through a support plate; when the fixing member 25 is a hook, the first heat exchanger 100 can be directly connected to the hook.

[0175] The “edge 100d” may refer to a boundary or edge of the peripheral contour of the first heat exchange element 100. For example, when the first heat exchange element 100 is rectangular, the edge 100d may refer to the four sides of the first heat exchange element 100 forming the rectangle.

[0176] In the above embodiment, the first heat exchange element 100 can be bonded to the wall of the housing 200 by glue, and at least one edge 100d of the first heat exchange element 100 is fixed to the housing 200 by a fixing member 25. Referring to FIG7 , the first heat exchange element 100 can be rectangular in shape and have four edges 100d, which are respectively located at two ends of the first direction X and two ends of the second direction Y of the first heat exchange element 100. The fixing member 25 can be provided corresponding to one or more of the four edges 100d. Thus, the fixing member 25 can restrain the edge 100d of the first heat exchange member 100 and securely connect the edge 100d of the first heat exchange member 100 to the housing 200, thereby improving the reliability of the fit between the first heat exchange member 100 and the housing 200, reducing the probability of separation between the first heat exchange member 100 and the housing 200, and improving the reliability of the connection of the first heat exchange member 100 to the housing 200. Furthermore, the better fit between the first heat exchange member 100 and the housing 200 also helps improve heat exchange reliability, enabling the first heat exchange member 100 to better regulate the temperature of the battery cells 102, thereby improving the reliability of the battery 1.

[0177] For example, referring to FIG. 7 , fixing members 25 may be provided at edges 100 d of the first heat exchange member 100 at both ends in the second direction Y. The fixing members 25 fix the portion of the first heat exchange member 100 close to the edge 100 d to the housing 200 .

[0178] In the above technical solution, the fixing member 25 can be arranged close to at least one edge 100d of the first heat exchange member 100, thereby fixing at least one edge 100d of the first heat exchange member 100 to the housing 200, thereby improving the connection reliability between the area where the edge 100d of the first heat exchange member 100 is located and the housing 200, thereby improving the connection firmness between the first heat exchange member 100 and the housing 200, and helping to improve the overall heat exchange stability of the first heat exchange member 100 to the battery 1, thereby improving the reliability of the battery 1.

[0179] In some embodiments of the present application, referring to FIG. 8 and FIG. 11 , a first groove 2011 a is provided on the wall of the box body 200 close to the first heat exchange element 100 , and the fixing element 25 is at least partially located in the first groove 2011 a .

[0180] The box wall may refer to the wall body that encloses the interior space of the box body 200, and can be understood as a flat structure that surrounds the interior space of the box body 200. The box wall may be made of, but is not limited to, other materials such as wood, plastic, and metal. Due to the different shapes of the box body 200, the number of box walls that enclose it also varies. For example, when the box body 200 is in the shape of a rectangular parallelepiped, the box body 200 has six box walls. Among the multiple box walls of the box body 200, one of the box walls can be denoted as the first box wall 2011, and the first groove 2011a is provided on the first box wall 2011.

[0181] The first groove 2011a may refer to a notch or cutout formed on the box wall for accommodating or fixing components. The shape of the first groove 2011a may include, but is not limited to, a square, a strip, a circle, a racetrack, etc., and may be adjusted according to the shape of the fixing member 25 to match the shape of the fixing member 25.

[0182] There are many ways to form the first groove 2011a in the box wall. For example, when the thickness of the first box wall 2011 is relatively large, the first groove 2011a can be a groove dug on the first box wall 2011; when the first box wall 2011 is a sheet metal part with a relatively small thickness, the first groove 2011a can be a groove formed by the first box wall 2011 being depressed.

[0183] In the above solution, the fixing member 25 can be partially located in the first groove 2011a, that is, the height of the fixing member 25 is greater than the depth of the first groove 2011a; the fixing member 25 can also be completely located in the first groove 2011a, that is, the height of the fixing member 25 is less than or equal to the depth of the first groove 2011a. For example, referring to Figures 8 and 11, the box wall where the first groove 2011a is located can be the bottom wall of the box body 200. Therefore, the "height of the fixing member 25" and "depth of the first groove 2011a" mentioned above can refer to the third direction Z of Figure 11. In other words, the fixing member 25 protrudes relatively little or not at all relative to the box wall in the third direction Z. As a result, the assembly formed by the box body 200, the fixing member 25, and the first heat exchange element 100 has a relatively compact structure in the third direction Z, and the overall size in the third direction Z is relatively small.

[0184] In the above technical solution, since the fixing member 25 is at least partially disposed within the first groove 2011a, the first groove 2011a provides the space required for installing the fixing member 25. This, on the one hand, improves the structural compactness of the assembly formed by the housing 200, the fixing member 25, and the first heat exchange element 100. The housing 200 can be made relatively small, which helps save space, reduce its volume, and increase the volumetric energy density of the battery 1. On the other hand, the first groove 2011a acts as a limiter and restraint for the fixing member 25, improving the reliability of the connection between the fixing member 25 and the housing 200, and thereby improving the reliability of the connection between the first heat exchange element 100 and the housing 200, thereby improving the reliability of the battery 1 and extending its service life.

[0185] In some embodiments of the present application, referring to Figures 9, 10, and 11, the box wall of the box body 200 near the first heat exchange element 100 protrudes toward the inner side of the accommodating cavity 21 to form a convex portion 2012, and the surrounding wall of the protruding position of the convex portion 2012 forms a first groove 2011a; the battery 1 also includes: a beam body 103, the beam body 103 is arranged in the accommodating cavity 21, the beam body 103 is provided with a second groove 103a, and at least a portion of the convex portion 2012 is arranged in the second groove 103a.

[0186] The convex portion 2012 may refer to a portion of the first box wall 2011 that is protruding or raised relative to the surrounding area. For example, in combination with the above, when the first box wall 2011 is a sheet metal part, the convex portion 2012 may be a rib on the first box wall 2011.

[0187] The beam 103 may be a beam arranged inside the box 200 to reinforce the battery cell 102, or may be a beam (e.g., an expansion beam) that cushions the expansion of the battery cell 102. The beam 103 may be, but is not limited to, a solid beam or a hollow beam. The shape of the beam 103 may be, but is not limited to, a square or a cylinder.

[0188] The second groove 103 a may refer to a notch or a cutout provided on the beam body 103 for accommodating or fixing components.

[0189] In the above technical solution, the protrusion 2012 protrudes toward the inside of the case 200, and the peripheral wall at the protruding position forms a first groove 2011a. Thus, while the first groove 2011a is formed in the case wall of the case 200 and can be used to accommodate the fixing member 25, the thickness of the remaining portion of the case wall, excluding the protrusion 2012, can be made relatively thin. This helps reduce the thickness of the case wall where the first groove 2011a is located, reducing the weight of the case 200, thereby increasing the energy density of the battery 1. Furthermore, the formation of the first groove 2011a in the peripheral wall of the protrusion 2012 also helps improve the strength of the case wall where the first groove 2011a is located, reducing the probability of the case wall suffering from insufficient structural strength due to the provision of the first groove 2011a, thereby improving the reliability of the case wall where the first groove 2011a is located, and thereby improving the reliability of the case 200, and thus improving the reliability of the battery 1 as a whole. By providing the second groove 103a of the beam body 103 to accommodate the protrusion 2012, the beam body 103 and the protrusion 2012 can be combined together, reducing the probability of the protrusion 2012 occupying the space required by the battery cells 102 in the box body 200, which is conducive to improving the compactness of the internal structure of the battery 1, thereby increasing the volumetric energy density of the battery 1. The protrusion 2012 and the second groove 103a can cooperate to limit the beam body 103, improve the connection reliability between the beam body 103 and the box body 200, and thus improve the reliability of the battery 1.

[0190] In some embodiments of the present application, referring to FIG. 7 , FIG. 8 and FIG. 9 , the beam body 103 and the fixing member 25 extend along the first direction X, and the second groove 103 a and the protrusion 2012 extend along the first direction X.

[0191] In the above technical solution, the beam body 103, the fixing member 25, the second groove 103a, and the protrusion 2012 are all elongated. The elongated shape of the second groove 103a and the protrusion 2012 not only improves the strength of the beam body 103, but also improves the tensile and bending strength of the beam body 103 in the first direction X, thereby improving the overall strength of the beam body 103. The elongated shape of the fixing member 25, on the one hand, can work together with the protrusion 2012 to further improve the structural strength of the beam body 103, and on the other hand, it can provide more fixing positions and a larger fixing surface, thereby enhancing the fixing effect on the first heat exchanger 100. While achieving a better fixing effect on the first heat exchanger 100, it can also reduce the number of fixing members 25 and improve assembly efficiency.

[0192] In some embodiments of the present application, referring to FIG. 9 to FIG. 11 , the beam body 103 is an expansion beam that can expand or contract along a second direction Y, where the second direction Y is parallel to the first box wall 2011 and perpendicular to the first direction X.

[0193] The expansion beam may refer to a component used to alleviate the volume expansion or contraction caused by charging and discharging or temperature changes inside the battery 1. The expansion beam is usually made of a flexible material, such as elastic rubber or polymer.

[0194] During the use of battery 1, the expansion beam can absorb the volume changes caused by the chemical reactions within the battery by deforming or bending, preventing or reducing deformation of the battery cell 102 and reducing the risk of stress concentration and damage to the battery cell 102. The expansion beam also protects the positive and negative electrodes and other components of the battery cell 102, reducing the chance of damage or rupture during the charge and discharge process of battery 1. Therefore, by reducing stress concentration and structural instability, the expansion beam helps maintain the electrochemical performance and cycle life of battery 1, and is one of the more important components of battery 1.

[0195] In the above technical solution, since the fixing member 25 extends along the first direction X, and the second groove 103a and the protrusion 2012 extend along the first direction X, the fixing member 25 and the protrusion 2012 can improve the structural strength of the expansion beam, and improve the tensile and bending strength of the expansion beam in the first direction X, and thus improve the reliability of the expansion beam, thereby helping to reduce the probability of stress concentration and structural instability in the battery cell 102, and further improve the overall reliability of the battery 1.

[0196] In some embodiments of the present application, referring to FIG. 11 , the beam body 103 is a hollow beam, and a portion of the beam body 103 protrudes toward the inside of the hollow beam to form a second groove 103 a .

[0197] A hollow beam is a beam structure with a hollow center section, typically hollowed out. The hollowed-out shape can include, but is not limited to, circular, rectangular, triangular, and trapezoidal shapes.

[0198] In the above technical solution, by configuring the beam body 103 as a hollow beam, and by having a portion of the beam body 103 protrude inwardly of the hollow beam to form the second groove 103a, the strength of the beam body 103 can be further increased, thereby improving the reliability of the beam body 103. Furthermore, since the beam body 103 is a hollow beam, the second groove 103a can be formed by protruding inwardly, which helps to reduce the difficulty of forming the second groove 103a, improve the manufacturability of the second groove 103a, and thus reduce manufacturing costs. The hollow beam 103 can also reduce the weight of the beam body 103, thereby reducing the overall weight of the battery 1 and increasing the energy density of the battery 1. Furthermore, the hollow beam 103 has higher strength and rigidity, can provide better support, and can reduce the amount of material used, further reducing manufacturing costs.

[0199] In some embodiments of the present application, the protrusion 2012 and the second groove 103 a are bonded together.

[0200] The protrusion 2012 and the second groove 103a are bonded together, which may refer to the protrusion 2012 and the second groove 103a being bonded together using, but not limited to, glue, double-sided tape, hot melt adhesive, and the like.

[0201] In the above technical solution, the bonding between the protrusion 2012 and the second groove 103a can make the combination of the two tighter and stronger, while improving the connection reliability between the beam body 103 and the box body 200, and further enhancing the strength amplification effect of the protrusion 2012 on the beam body 103, so that the beam body 103 has higher strength.

[0202] In some embodiments of the present application, the beam body 103 is a non-metallic beam body. In this technical solution, since the protrusion 2012 and the second groove 103a cooperate to increase the strength of the beam body 103, the beam body 103's own strength requirements can be reduced. By setting the beam body 103 as a non-metallic beam body, the weight of the beam body 103 can be reduced, and electrical safety and thermal insulation effects can also be improved.

[0203] In some embodiments of the present application, referring to Figures 7 and 12, the first heat exchange element 100 includes a first heat exchange channel 10, and 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, and 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 fixing member 25 is connected to the first heat exchange section 11 and the second heat exchange section 12, and is arranged close to or corresponding to the bent parts of the first heat exchange section 11 and the second heat exchange section 12.

[0204] Specifically, the battery 1 may include multiple battery cells 102 , and the first heat exchange channel 10 is used to exchange heat with the multiple battery cells 102 of the battery 1 , so that the temperature of the battery 1 can be limited to a safe operating temperature, thereby improving the operating reliability of the battery 1 .

[0205] Among them, the above-mentioned "the second heat exchange section 12 is bent to form a U-shaped area 120 (see the dotted part in Figure 12), and the first heat exchange section 11 is bent and arranged in the U-shaped area 120" is intended to illustrate that the second heat exchange section 12 is arranged on the circumferential periphery of the first heat exchange section 11, and can be arranged on the three circumferential sides of the first heat exchange section 11. The second heat exchange section 12 can be arranged closer to the peripheral position of the battery 1 relative to the first heat exchange section 11.

[0206] The second heat exchange section 12 is bent to form a U-shaped area 120 , that is, in the direction from one end of the second heat exchange section 12 toward the other end, the second heat exchange section 12 extends along the U-shaped line to form the U-shaped area 120 .

[0207] The first heat exchange section 11 is bent and arranged 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.

[0208] It should be noted that this embodiment only limits the first heat exchange section 11 to being bent and disposed within the U-shaped region, and does not limit the bending form of the first heat exchange section 11. That is, the specific bending form of the first heat exchange section 11 can be designed according to the heat exchange requirements of the battery 1. For example, the first heat exchange section 11 can extend along the length direction of the battery cell 102 (i.e., the first direction X in FIG. 12 ), and after extending to a certain length, bend toward the width direction of the battery cell 102 (i.e., the second direction Y in FIG. 12 ), and then continue to extend along the length direction of the battery cell 102 and bend along the width direction. Alternatively, the first heat exchange section 11 can extend along the width direction of the battery cell 102, and after extending to a certain length, bend toward the length direction of the battery cell 102, and then continue to extend along the width direction of the battery cell 102 and bend along the length direction.

[0209] 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.

[0210] 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. Therefore, when the first heat exchange channel 10 is exchanging heat, the heat exchange medium can flow from the first heat exchange section 11 to the second heat exchange section 12, or from the second heat exchange section 12 to the first heat exchange section 11.

[0211] It is understandable that as the heat exchange fluid flows through the first heat exchange channel 10, the temperature of the heat exchange fluid gradually changes, resulting in a gradual decrease in the heat exchange effect. For example, when the first heat exchange element 100 cools and dissipates heat from the battery 1, the heat from the battery cell 102 is gradually transferred to the heat exchange fluid, causing the temperature of the heat exchange fluid to gradually increase as it flows along the first heat exchange channel 10, the temperature difference between the heat exchange fluid and the battery cell 102 gradually decreases, and the heat exchange efficiency gradually decreases. When the first heat exchange element 100 heats and raises the temperature of the battery 1, the heat in the heat exchange fluid is gradually transferred to the battery cell 102, causing the temperature of the heat exchange fluid to gradually decrease as it flows along the first heat exchange channel 10, the temperature difference between the heat exchange fluid and the battery cell 102 gradually decreases, and the heat exchange efficiency gradually decreases.

[0212] In this embodiment, when the first heat exchange element 100 is dissipating heat and cooling the battery 1, the heat exchange fluid can also flow from the first heat exchange section 11 to the second heat exchange section 12, but the heat exchange fluid can also flow from the second heat exchange section 12 to the first heat exchange section 11. When the heat exchange fluid also flows from the first heat exchange section 11 to the second heat exchange section 12, the battery cells 102 in the middle of the battery 1 (that is, the internal battery cells 102 on the inner side of the periphery) can be cooled first, and then the battery cells 102 at the peripheral edge of the battery 1 can be cooled. Since the heat dissipation of the battery cells 102 at the peripheral edge of the battery 1 is better than that of the internal battery cells 102, 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 102 in the middle of the battery 1, and at the same time Since the battery cells 102 at the peripheral position can naturally dissipate heat directly to the external environment, when the temperature of the heat exchange fluid in the second heat exchange section 12 is slightly higher, it can still meet the heat dissipation needs of the peripheral battery cells 102, so that the cooling effects obtained by the battery cells 102 at the peripheral position of the battery 1 and the battery cells 102 at the middle position of the battery 1 are roughly the same, and the temperatures of the battery cells 102 at the peripheral position of the battery 1 and the battery cells 102 at the middle position of the battery 1 after cooling and heat dissipation are relatively consistent, making the temperature distribution in the battery 1 more uniform.

[0213] When the first heat exchange element 100 heats the battery 1, the heat exchange fluid may also flow from the first heat exchange section 11 to the second heat exchange section 12, but the heat exchange fluid may also flow from the second heat exchange section 12 to the first heat exchange section 11. For example, when the heat exchange fluid flows from the second heat exchange section 12 to the first heat exchange section 11, the battery cells 102 at the periphery of the battery 1 may be heated first, and then the heat exchange fluid may cool the battery cells 102 at the middle of the battery 1. Since the battery cells 102 at the periphery of the battery 1 dissipate more heat to the external environment, the temperature of the battery cells 102 at the periphery of the battery 1 is more likely to drop. The heat exchange fluid first heats the battery cells 102 at the periphery of the battery 1. The higher temperature heat exchange fluid may increase the temperature of the battery cells 102 at the periphery while compensating for the heat lost by the battery cells 102 due to heat dissipation to the external environment. The amount of heat generated by the battery cells 102 themselves can meet their heating needs. The battery cells 102 in the middle of the battery 1 have less 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 102 themselves to well meet their heating needs. As a result, the battery cells 102 at the periphery of the battery 1 and the battery cells 102 at the middle of the battery 1 can obtain basically the same heating effect, thereby making the temperatures of the battery cells 102 at the periphery of the battery 1 and the battery cells 102 at the middle of the battery 1 more consistent after heating, making the temperature distribution in the battery 1 more uniform.

[0214] Since the first heat exchange section 11 and the second heat exchange section 12 are bent structures, the bent parts of the first heat exchange section 11 and the second heat exchange section 12 may refer to the edge positions of the first heat exchange section 11 and the second heat exchange section 12, and since the first heat exchange section 11 and the second heat exchange section 12 are usually connected to the box body 200 by bonding, affected by the bonding process, the outer sides of the bent parts of the first heat exchange section 11 and the second heat exchange section 12 are less constrained than the center side areas of the first heat exchange section 11 and the second heat exchange section 12, and the probability of debonding or loose bonding is relatively high. In the present application, the fixing member 25 can be connected to the bent portion of the first heat exchange section 11 and the second heat exchange section 12, or be arranged near the bent portion of the first heat exchange section 11 and the second heat exchange section 12, so that the fixing member 25 can increase the restraining and limiting effect on the bent portion of the first heat exchange section 11 and the second heat exchange section 12, thereby reducing the probability of debonding or loose compression between the bent portion of the first heat exchange section 11 and the second heat exchange section 12 and the box body 200, thereby improving the heat exchange reliability of the first heat exchange section 11 and the second heat exchange section 12, and thereby improving the reliability of the battery 1.

[0215] In the above technical solution, 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. When the first heat exchange component 100 exchanges heat with the battery 1, the U-shaped area 120 formed by the outer second heat exchange section 12 can be opposite to the outer battery cell 102 of the battery 1, and the first heat exchange section 11 in the U-shaped area 120 can be opposite to the internal battery cell 102, so that the first heat exchange component 100 can compensate for the internal and external temperature difference caused by the heat exchange between the outer battery cell 102 and the environment, so that the heat exchange effect of the battery cell 102 outside the battery 1 and the battery cell 102 inside the battery 1 tend to be consistent, thereby improving the temperature uniformity of the battery 1, thereby improving the service life of the battery 1 to a certain extent. The fixing part 25 can play a restraining and limiting role on the area where the bent parts of the first heat exchange section 11 and the second heat exchange section 12 are located, thereby improving the connection reliability between the bent parts of the first heat exchange section 11 and the second heat exchange section 12 and the box body 200, and further improving the working reliability of the first heat exchange section 11 and the second heat exchange section 12, which is beneficial to improving the reliability of the battery 1.

[0216] According to some embodiments of the present application, referring to FIG. 12 , the second heat exchange section 12 may be located at the outermost side of the first heat exchange channel 10 in the circumferential direction.

[0217] That is to say, the second heat exchange section 12 is formed as the outermost flow channel of the first heat exchange channel 10. In this way, the second heat exchange section 12 can be used to exchange heat with the battery cells 102 around the battery 1, thereby improving the temperature uniformity of the battery cells 102 around the battery 1.

[0218] In the above technical solution, by arranging the second heat exchange section 12 at the outermost side of the circumference of the first heat exchange channel 10, the second heat exchange section 12 can exchange heat with the battery cells 102 on the outer circumference of the battery 1, which is beneficial to improving the temperature difference between the inside and outside of the battery 1 caused by heat exchange with the environment, and to a certain extent, improve the service life of the battery 1.

[0219] According to some embodiments of the present application, the first heat exchange section 11 and the second heat exchange section 12 can be bent in the same plane.

[0220] In the above technical solution, 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 with the battery 1 in the same plane. As a result, 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 at the same time, the space occupied by the first heat exchange channel 10 can be reduced, thereby improving the volume energy density of the battery 1.

[0221] In some embodiments of the present application, referring to Figures 7 and 12, the first heat exchange element 100 includes a first heat exchange channel 10, and 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, and 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.

[0222] In the above technical solution, 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. When the first heat exchange component 100 exchanges heat with the battery 1, the U-shaped area 120 formed by the outer second heat exchange section 12 can be opposite to the outer battery cell 102 of the battery 1, and the first heat exchange section 11 in the U-shaped area 120 can be opposite to the internal battery cell 102, so that the first heat exchange component 100 can compensate for the internal and external temperature difference caused by the heat exchange between the outer battery cell 102 and the environment, so that the heat exchange effect of the battery cell 102 outside the battery 1 and the battery cell 102 inside the battery 1 tend to be consistent, thereby improving the temperature uniformity of the battery 1, thereby improving the service life of the battery 1 to a certain extent.

[0223] In some embodiments of the present application, referring to Figures 7, 8 and 12, the first heat exchange section 11 includes a plurality of first heat exchange parts 111, which are arranged at intervals along the first direction X and are bent and connected in sequence. Each first heat exchange part 111 extends straight along the second direction Y, and the first direction X and the second direction Y are arranged at an angle.

[0224] That is, the plurality of first heat exchange sections 111 are sequentially connected, and the connection between two connected first heat exchange sections 111 is bent. For example, the two connected first heat exchange sections 111 can be bent along a fold line or an arc. The number of first heat exchange sections 111 can be two, three, four, five, or more.

[0225] It should be noted that the first heat exchange portion 111 can have various shapes. For example, the first heat exchange portion 111 can be linear or curved. The first heat exchange portion 111 can also extend in various directions. For example, it can extend along the length or thickness of the battery cell 102. In this way, multiple first heat exchange portions 111 are connected in a series of bends, allowing the first heat exchange section 11 to form an S-shaped, X-shaped, or V-shaped heat exchange channel.

[0226] The phrase "the first direction X and the second direction Y are arranged at an angle" is intended to illustrate that the first direction X and the second direction Y can be arranged perpendicularly or intersectingly, but not perpendicularly. For example, the first direction X and the second direction Y can be arranged at an angle of 30°, 60°, 80°, 120°, 150°, or 170°. For example, as shown in FIG12 , the first direction X is the length direction of the battery cell 102, and the second direction Y is the thickness direction of the battery cell 102. The first heat exchange portions 111 extend along the length direction of the battery cell 102 and are spaced apart along the thickness direction of the battery cell 102. In this way, multiple first heat exchange portions 111 are connected by bending to form an S-shaped heat exchange channel, enabling heat exchange between multiple battery cells 102.

[0227] In the above technical solution, on the one hand, by providing multiple first heat exchange sections 111, the heat exchange area of ​​the first heat exchange section 11 can be increased, and thus the heat exchange area of ​​the first heat exchange channel 10 can be increased, thereby improving the heat exchange effect of the first heat exchange channel 10. On the other hand, because the internal battery cells are wrapped by the external battery cells, the temperature difference between the internal battery cells is not large. Therefore, by providing multiple first heat exchange sections 111, the overall heat exchange effect can be improved while ensuring a small temperature difference between the internal and external battery cells. By providing the first heat exchange sections 111 to extend linearly along the second direction Y, the production difficulty of the first heat exchange sections 111 can be reduced, thereby reducing the production complexity of the first heat exchange channel 10. 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.

[0228] According to some embodiments of the present application, referring to FIG. 7 and FIG. 12 , 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 .

[0229] The first bend 112 is arc-shaped, that is, the first bend 112 extends along an arc, and the fluid flow directions at both ends of the first bend 112 form a certain angle. As a result, the first bend 112 can change the flow direction of the fluid, thereby allowing the two connected first heat exchange sections 111 to be extended and arranged within 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 bend 112 is arc-shaped, and the arc shape can reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the fluid and further improving the heat exchange efficiency of the first heat exchange section 11.

[0230] Furthermore, the number of the first bends 112 can be one, two, three or more. The first bends 112 can make the first heat exchange section 11 arranged in a circuitous manner, 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.

[0231] In the above technical solution, by providing the first bend 112, the direction of fluid flow within the first heat exchange section 11 can be changed, achieving a smooth transition connection between the two first heat exchange sections 111, and realizing a circuitous extension of the first heat exchange channel 10. This can increase the contact area between a single battery cell and the first heat exchange channel 10, thereby increasing the heat exchange area and improving the heat exchange efficiency of the first heat exchange channel 10. At the same time, the arc-shaped first bend 112 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. In addition, the provision of the first bend 112 also makes the structure of the first heat exchange section 11 more compact, occupies a smaller overall space size, and is more conducive to realizing the miniaturization design of the battery 1 and improving the volume energy density of the battery 1.

[0232] According to some embodiments of the present application, referring to FIG. 7 and FIG. 12 , the first bending portion 112 may be in a semicircular arc shape.

[0233] That is to say, the first bend portion 112 can extend along a semicircular arc line. Specifically, the first bend 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 by the first bend portion 112. The angle between the inlet and outlet of the first bend portion 112 is 180°, and the flow directions at the outlet and inlet positions of the first bend portion 112 are opposite, so that the two adjacent first heat exchange portions 111 are closer together, and the structure of the entire first heat exchange section 11 is more compact and reliable. Among them, the first bend 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 bend 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.

[0234] The two first heat exchange parts 111 are connected through the first bending part 112 to form a "U"-shaped heat exchange channel. The first heat exchange section 11 can 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.

[0235] In the above technical solution, by setting the first bending portion 112 to be semicircular, the design diversity of the heat exchange channel can be increased, thereby improving the compatibility of the first heat exchange element 100 with the battery 1; at the same time, the semicircular structure is relatively simple, thereby reducing the production difficulty of the first heat exchange element 100 and improving the production speed of the first heat exchange element 100.

[0236] In some embodiments of the present application, referring to FIG. 7 , the fixing member 25 is connected to the first bending portion 112 or a portion of the first heat exchange portion 111 close to the first bending portion 112 .

[0237] It can be understood that the fixing part 25 can be connected to the first bending part 112, or it can be connected to the part of the first heat exchange part 111 close to the first bending part 112. Regardless of which of the above methods is used, the fixing part 25 can fix the first heat exchange part 111 on the box body 200, thereby improving the reliability of the first heat exchange part 111 and the first bending part 112, which is beneficial to the smooth flow of the heat exchange fluid in the first heat exchange part 111 and the first bending part 112.

[0238] In the above technical solution, connecting the first bending portion 112 or the portion of the first heat exchange portion 111 close to the first bending portion 112 through the fixing member 25 can improve the reliability of the first heat exchange portion 111 and the first bending portion 112, thereby improving the heat exchange stability of the battery cell 102, which is beneficial to improving the reliability of the battery 1.

[0239] In some embodiments of the present application, referring to Figures 7 and 12, the second heat exchange section 12 includes: a second heat exchange part 121, a third heat exchange part 122 and a fourth heat exchange part 125, the second heat exchange part 121 extends along the first side circumference of the first heat exchange section 11, the third heat exchange part 122 is connected between the second heat exchange part 121 and the first heat exchange section 11, and extends along the second side circumference of the first heat exchange section 11, the first end of the third heat exchange part 122 is connected to the second heat exchange part 121 at an angle, and the second end of the third heat exchange part 122 is connected to the first heat exchange section 11 at an angle; the fourth heat exchange part 125 is in communication with the second heat exchange part 121, is connected to the second heat exchange part 121 at an angle, and extends along the third side circumference of the first heat exchange section 11.

[0240] It can be understood that the fourth heat exchange part 125 is connected to the end of the second heat exchange part 121 away from the third heat exchange part 122, the fourth heat exchange part 125, the second heat exchange part 121 and the third heat exchange part 122 are connected in sequence to form a U-shaped area 120, and the first heat exchange section 11 is arranged in the U-shaped area 120 and is connected to the end of the third heat exchange part 122 away from the second heat exchange part 121.

[0241] The first end of the third heat exchange portion 122 is connected to the second heat exchange portion 121 at an angle. That is, the third heat exchange portion 122 is connected to the second heat exchange portion 121, and the third heat exchange portion 122 and the second heat exchange portion 121 are not collinear or parallel, but are arranged at an angle greater than 0° and less than 180°. For example, the third heat exchange portion 122 and the second heat exchange portion 121 can be connected at an angle of 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0242] The second end of the third heat exchange section 122 is connected to the first heat exchange section 11 at an angle; that is, the second end of the third heat exchange section 122 is connected to the second heat exchange section 121, and the second end of the third heat exchange section 122 is arranged at an angle greater than 0° and less than 180° to the first heat exchange section 11. For example, the second end of the third heat exchange section 122 can be connected to the first heat exchange section 11 at an angle of 30°, 45°, 60°, 90°, 120°, 135°, 150°, and so on.

[0243] The fourth heat exchange portion 125 is in communication with the second heat exchange portion 121 and is connected to the second heat exchange portion 121 at an angle. That is, the fourth heat exchange portion 125 is connected to the second heat exchange portion 121 at an angle greater than 0° and less than 180°. For example, the fourth heat exchange portion 125 is connected to the second heat exchange portion 121 at an angle of 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0244] It should be noted that this embodiment limits the second heat exchange section 12 to be arranged on three sides of the circumference of the first heat exchange section 11, and does not limit the specific positions of the second heat exchange section 121, the third heat exchange section 122 and the fourth heat exchange section 125 relative to the first heat exchange section 11. Therefore, the specific positions of the second heat exchange section 121, the third heat exchange section 122 and the fourth heat exchange section 125 can be designed according to actual conditions. For example, if the second heat exchange section 121 can be arranged on one side of the first heat exchange section 11 in the first direction, the third heat exchange section 122 and the fourth heat exchange section 125 are respectively arranged on both sides of the first heat exchange section 11 in the second direction; if the second heat exchange section 121 is arranged on one side of the first heat exchange section 11 in the second direction, the third heat exchange section 122 and the fourth heat exchange section 125 are respectively arranged on both sides of the first heat exchange section 11 in the first direction.

[0245] In the above technical solution, by arranging the second heat exchange part 121, the third heat exchange part 122 and the fourth heat exchange part 125 on three sides of the first heat exchange section 11 respectively, the second heat exchange section 12 can surround the first heat exchange section 11, thereby increasing the compactness of the arrangement of the first heat exchange channel 10, realizing the miniaturization of the structure of the first heat exchange channel 10, and thus being beneficial to improving the volume energy density of the battery 1. At the same time, the structure of the first heat exchange channel 10 can also be simplified, facilitating the processing and production of the first heat exchange component 100.

[0246] In some embodiments of the present application, referring to Figures 7 and 12, the first heat exchange section 11 includes a plurality of first heat exchange parts 111, and the plurality of first heat exchange parts 111 are bent and connected in sequence in the first direction X; wherein, the second heat exchange part 121 is located on one side of the plurality of first heat exchange parts 111 along the first direction X, and the third heat exchange part 122 is located on one side of the plurality of first heat exchange parts 111 along the second direction Y, and the first direction X and the second direction Y are arranged at an angle; the first end of the third heat exchange part 122 is aligned with the second heat exchange part 111. 21 is connected to one end along the second direction Y, 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 first direction X, the fourth heat exchange part 125 is located on the other side of the multiple first heat exchange parts 111 along the second direction Y, one end of the fourth heat exchange part 125 is connected to one end of the second heat exchange part 121 away from the third heat exchange part 122, and the other end of the fourth heat exchange part 125 extends along the first direction X toward a direction away from the second heat exchange part 121.

[0247] The multiple first heat exchange parts 111 are sequentially bent and connected in the first direction X. That is, the multiple first heat exchange parts 111 are sequentially arranged in the first direction X, and in the first direction X, two adjacent and connected first heat exchange parts 111 are bent and connected. The first heat exchange parts 111 can extend along a straight line parallel to the second direction Y, or along a straight line arranged at an angle to the second direction Y, or along a curve and / or a broken line in the second direction Y.

[0248] It can be understood that the fourth heat exchange part 125, the second heat exchange part 121, the third heat exchange part 122 and the first heat exchange part 111 farthest from the second heat exchange part 121 are connected in sequence, and multiple first heat exchange parts 111 are arranged at intervals along the first direction X and connected in sequence. In this way, the heat exchange fluid can flow through the fourth heat exchange part 125, the second heat exchange part 121 and the third heat exchange part 122 in sequence, and then enter the first heat exchange section 11. In the first heat exchange section 11, the fluid first passes through the first heat exchange part 111 farthest from the second heat exchange part 121, and finally flows to the first heat exchange part 111 closest to the second heat exchange part 121; or, the heat exchange fluid can first flow into the first heat exchange section 11. In the first heat exchange section 11, the fluid first flows through the first heat exchange part 111 closest to the second heat exchange part 121, flows out from the first heat exchange part 111 farthest from the second heat exchange part 121 and flows to the third heat exchange part 122, and then flows through the second heat exchange part 121 and the fourth heat exchange part 125 in sequence through the third heat exchange part 122.

[0249] In addition, the phrase “the first direction X and the second direction Y are arranged at an angle” is intended to explain that the first direction X and the second direction Y may be arranged perpendicularly or may only intersect in a non-perpendicular arrangement. For example, the first direction X and the second direction Y may be arranged at an angle of 30°, 60°, 80°, 120°, 150°, or 170°.

[0250] Referring to Figure 12 , the first direction X may be the length direction of the battery cell 102, and the second direction Y may be the thickness direction of the battery cell 102. Specifically, the first heat exchange portion 111 extends linearly along the second direction Y, and multiple first heat exchange portions 111 are arranged at intervals in the first direction X. The second heat exchange portion 121 is arranged on a side of the multiple first heat exchange portions 111 near the edge of the housing 200 and is used for heat exchange with the outermost battery cells 102 in the battery assembly composed of multiple rows of battery cells 102. The third heat exchange portion 122 is arranged on a side of the multiple first heat exchange portions 111 near the middle of the housing 200 and is used for heat exchange with the battery cells 102 near the middle of the battery assembly. The fourth heat exchange portion 125 is arranged at one end of the multiple first heat exchange portions 111 along the second direction Y and extends along the first direction X. The fourth heat exchange portion 125 can be used for heat exchange with the battery cells 102 at one end of the battery assembly in the second direction Y.

[0251] In the above technical solution, by setting up multiple first heat exchange parts 111 to be bent and connected in sequence in the first direction X, the second heat exchange part 121 is located on one side of the multiple first heat exchange parts 111 along the first direction X, the third heat exchange part 122 is located on one side of the multiple first heat exchange parts 111 along the second direction Y, and the fourth heat exchange part 125 is located on the other side of the multiple first heat exchange parts 111 along the second direction Y. The positional relationship among the second heat exchange part 121, the third heat exchange part 122, the fourth heat exchange part 125 and the first heat exchange part 111 is limited, the layout of the first heat exchange channel 10 is further limited, the structure of the first heat exchange channel 10 is simplified, and the manufacturing and processing is facilitated.

[0252] In some embodiments of the present application, referring to FIG. 12 , the third heat exchange portion 122 and the fourth heat exchange portion 125 are extended along the first direction X, and the first heat exchange portion 111 and the second heat exchange portion 121 are both extended along the second direction Y.

[0253] Furthermore, the third heat exchange portion 122 and the fourth heat exchange portion 125 can both extend linearly along the first direction X, and the first heat exchange portion 111 and the second heat exchange portion 121 can both extend linearly along the second direction Y. The linear structure is simple, easy to produce, and convenient to arrange, thereby further reducing the production complexity and production cost of the first heat exchange channel 10.

[0254] In the above technical solution, by arranging the third heat exchange part 122 and the fourth heat exchange part 125 to extend along the first direction X, the first heat exchange part 111 and the second heat exchange part 121 are both extended along the second direction Y, 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.

[0255] In some embodiments of the present application, referring to FIG. 7 and FIG. 12 , the fourth heat exchange portion 125 extends along the first direction X and extends 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 .

[0256] Specifically, the fourth heat exchange part 125 extends along the first direction X, 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 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 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 farthest from the second heat exchange part 121.

[0257] 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 can be increased, the heat exchange effect of the first heat exchange element 100 can be further improved, and it is also beneficial to the layout of the first heat exchange channel 10.

[0258] In the above technical solution, by setting the fourth heat exchange part 125 to extend along the first direction X and extending to a position close to the 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 102 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 1.

[0259] According to some embodiments of the present application, referring to Figures 7 and 12, the second heat exchange section 12 may further 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.

[0260] Among them, the second bending portion 123 and the third bending portion 124 are respectively used to connect the second heat exchange portion 121 and the third heat exchange portion 122 and 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 direction at both ends of the second bending portion 123 has a certain angle, the third bending portion 124 is arc-shaped, that is, the third bending portion 124 extends along the arc line, and the fluid flow direction at both ends of the third bending portion 124 has a certain angle.

[0261] Thus, the second bend 123 and the third bend 124 can change the flow direction of the heat exchange fluid, allowing the second heat exchange section 12 to extend within a predetermined area and be used for heat exchange with the battery assembly consisting of multiple rows of battery cells 102. At the same time, the curved second bend 123 and the third bend 124 can reduce the flow resistance of the fluid and reduce pressure drop, thereby increasing the flow rate of the heat exchange fluid and further enhancing the heat exchange efficiency of the first heat exchange channel 10.

[0262] In the above technical solution, 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 in the second heat exchange section 12, reduce the pressure drop, increase the flow rate of the heat exchange fluid, and further increase the heat exchange efficiency of the first heat exchange channel 10.

[0263] According to some embodiments of the present application, referring to FIG. 7 and FIG. 12 , the second bent portion 123 may be in the shape of a quarter circle.

[0264] In other words, the second bend 123 can extend along a semicircular arc. Specifically, the first bend 112 can extend along a quarter-circular arc away from the protrusion of the first connecting section. The angle between the inlet and outlet of the second bend 123 can be 90°. The second bend 123 is similar to a 90° elbow in pipe materials, which can change the flow direction of the fluid, causing the fluid flow direction to change by 90° after passing through the second bend 123.

[0265] Furthermore, the second bending portion 123 connects the second heat exchange portion 121 and the third heat exchange portion 122 . At this time, the second heat exchange portion 121 and the third heat exchange portion 122 are arranged perpendicular to each other.

[0266] In the above technical solution, 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 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 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.

[0267] Optionally, the second bend 123 can also be semicircular in shape. That is, the second bend 123 can extend along a semicircular arc, with the angle between the inlet and outlet of the second bend 123 being 180°, and the flow directions at the outlet and inlet of the second bend 123 being opposite. This brings the third heat exchange section 122 and the second heat exchange section 121 closer together, making the structure of the entire second heat exchange section 12 more compact and reliable. In other embodiments, the degree of curvature of the second bend 123 can be adjusted as needed, for example, to 150°, 135°, etc., and the embodiments of this application are not limited thereto.

[0268] According to some embodiments of the present application, referring to FIG. 7 and FIG. 12 , the third bent portion 124 is in the shape of a quarter circle.

[0269] In other words, the third bend 124 can extend along a semicircular arc. Specifically, the third bend 124 can extend along a quarter-circular arc away from the protrusion of the first connecting section. The angle between the inlet and outlet of the third bend 124 is 90°. The third bend 124 is similar to a 90° elbow in pipe materials and can change the flow direction, causing the fluid to change its flow direction by 90° after passing through the third bend 124.

[0270] Furthermore, 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.

[0271] In the above technical solution, by setting the third bending portion 124 to be a quarter-circular arc shape, the flow direction of the fluid can be changed from the original flow direction to perpendicular to the original flow direction after passing through the 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 fluid can flow smoothly in the third bending portion 124, effectively preventing the fluid from flowing too slowly and causing a decrease in heat exchange efficiency.

[0272] Optionally, the third bend 124 can also be semicircular in shape. That is, the third bend 124 can extend along a semicircular arc, with the angle between the inlet and outlet of the third bend 124 being 180°, and the flow directions at the outlet and inlet of the third bend 124 being opposite. This brings the third heat exchange section 122 closer to the first heat exchange section 11, making the structures of the first heat exchange section 11 and the second heat exchange section 12 more compact and reliable. In other embodiments, the degree of curvature of the third bend 124 can be adjusted as needed, for example, to 150°, 135°, etc., and the embodiments of this application are not limited thereto.

[0273] In some embodiments of the present application, referring to Figure 7, the fixing member 25 is connected to the second bending portion 123 or the portion of the second heat exchange portion 121 close to the second bending portion 123; the fixing member 25 is connected to the third bending portion 124 or the portion of the first heat exchange section 11 close to the third bending portion 124.

[0274] The fixing part 25 is connected to the second bending part 123 or the part of the second heat exchange part 121 close to the second bending part 123. It can be understood that the fixing part 25 can be connected to the second bending part 123, or the fixing part 25 can also be connected to the part of the second heat exchange part 121 close to the second bending part 123. Thus, the fixing part 25 can improve the connection reliability between the adjacent areas of the second heat exchange part 121 and the second bending part 123 and the box body 200, thereby improving the stability of the liquid flow in the second heat exchange part 121 and the second bending part 123, and improving the heat exchange reliability of the part where the second heat exchange part 121 and the second bending part 123 are located.

[0275] The fixing member 25 is connected to the third bend 124 or the portion of the first heat exchange section 11 near the third bend 124. It can be understood that the fixing member 25 can be connected to the third bend 124, or the fixing member 25 can also be connected to the portion of the first heat exchange section 11 near the third bend 124. As a result, the fixing member 25 can improve the connection reliability between the adjacent areas of the first heat exchange section 11 and the third bend 124 and the housing 200, thereby improving the stability of the liquid flow in the first heat exchange section 11 and the third bend 124, and improving the heat exchange reliability of the portion where the first heat exchange section 11 and the third bend 124 are located.

[0276] In the above technical solution, the second bend 123 or the part of the second heat exchange part 121 close to the second bend 123 is connected by the fixing part 25, and the third bend 124 or the part of the first heat exchange section 11 close to the third bend 124 is connected by the fixing part 25. In this way, the connection reliability of the adjacent areas of the second bend 123 and the second heat exchange part 121, and the adjacent areas of the third bend 124 and the first heat exchange section 11 with the box body 200 can be improved, and the stability of the heat exchange fluid flowing through the second heat exchange part 121, the second bend 123, the third bend 124 and the first heat exchange section 11 can be improved, which is beneficial to improving the heat exchange reliability of the first heat exchange part 100 to the battery cell 102, thereby improving the reliability of the battery 1.

[0277] In some embodiments of the present application, referring to Figures 7 and 12, the first heat exchange channel 10 also includes: a third heat exchange section 13, the first heat exchange section 11 is connected between the third heat exchange section 13 and the second heat exchange section 12, and the third heat exchange section 13 is connected to the first heat exchange section 11 at an angle.

[0278] That is to say, in the first heat exchange channel 10, the second heat exchange section 12, the first heat exchange section 11 and the third heat exchange section 13 are connected in sequence, and the heat exchange fluid can flow from the second heat exchange section 12 to the third heat exchange section 13 through the first heat exchange section 11, or from the third heat exchange section 13 to the second heat exchange section 12 through the first heat exchange section 11.

[0279] 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.

[0280] In the above technical solution, by providing the third heat exchange section 13 , the heat exchange area of ​​the first heat exchange channel 10 can be further increased, thereby further improving the heat exchange effect of the first heat exchange channel 10 .

[0281] In some embodiments of the present application, referring to Figures 7 and 12, the first heat exchange section 11 includes a plurality of first heat exchange parts 111, which are bent and connected in sequence in the first direction X; 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 the third heat exchange section 13 is connected to the one of the plurality of first heat exchange parts 111 that is closest to the second heat exchange part 121 along the first direction X.

[0282] Specifically, the third heat exchange segment 13 is arranged adjacent to the fourth heat exchange portion 125 and between the fourth heat exchange portion 125 and the first heat exchange portion 111. Thus, the third heat exchange segment 13 is also arranged circumferentially outside the first heat exchange segment 11. This increases the circumferential heat exchange area of ​​the first heat exchange channel 10 and improves the heat exchange efficiency of the first heat exchange channel 10 at the circumferential side.

[0283] Furthermore, the third heat exchange section 13 and the fourth heat exchange section 125 can be arranged inside and outside of the same side of the first heat exchange section 11. This further increases the heat exchange area at this location and improves heat exchange efficiency. Furthermore, because the third heat exchange section 13 and the fourth heat exchange section 125 are located at opposite ends of the first heat exchange section 111 in the direction of fluid flow, they can exchange heat with the same area of ​​the battery assembly, thereby improving temperature uniformity in that area.

[0284] Furthermore, the third heat exchange section 13 is connected to the one of the multiple first heat exchange sections 111 that is closest to the second heat exchange section 121 along the first direction, the multiple first heat exchange sections 111 are connected sequentially in the first direction, and the third heat exchange section 122 is connected to the one of the multiple first heat exchange sections 111 that is farthest from the second heat exchange section 121 along the first direction. In this way, when heat exchange is carried out with the battery assembly composed of multiple rows of battery cells 102, in the first heat exchange channel 10, the temperatures of the heat exchange fluid in the first heat exchange section 111 that is closest to the second heat exchange section 121 and the heat exchange fluid in the third heat exchange section 13, as well as the temperatures of the heat exchange fluid in the second heat exchange section 121 and the fourth heat exchange section 125 are respectively the relatively highest temperature and the relatively lowest temperature in the first heat exchange channel 10, while the temperatures of the remaining parts are in the middle.

[0285] Due to the heat dissipation effect of the battery 1, the edge temperature of the battery 1 is lower than the middle temperature. In this way, the second heat exchange part 121 and the first heat exchange part 111 closest to the second heat exchange part 121 exchange heat in the same area, and the third heat exchange section 13 and the fourth heat exchange part 125 exchange heat in the same area, thereby further improving the temperature uniformity in the battery assembly, balancing the temperature difference of the battery assembly, and further improving the temperature uniformity of the battery assembly.

[0286] In the above technical solution, by adding a third heat exchange section 13 and connecting the third heat exchange section 13 to the one of the multiple first heat exchange parts 111 that is closest to the second heat exchange part 121 along the first direction, the heat exchange area can be increased, the temperature difference of the battery assembly can be balanced, and the temperature uniformity of the battery assembly can be improved.

[0287] In some embodiments of the present application, referring to Figures 7 and 12, the third heat exchange section 13 extends along the first direction X in a direction away from the second heat exchange portion 121, and the first heat exchange portion 111 extends along the second direction Y, wherein the first direction X and the second direction Y are arranged at an angle.

[0288] Specifically, one end of the third heat exchange part 122 is connected to one of the multiple first heat exchange parts 111 that is farthest from the second heat exchange part 121 along the first direction, and the other end of the third heat exchange part 122 extends toward the first heat exchange part 111 farthest from the second heat exchange part 121. At the same time, the fourth heat exchange part 125 also extends toward the first heat exchange part 111 farthest from the second heat exchange part 121.

[0289] Furthermore, 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. In this case, the third heat exchange section 13 and the fourth heat exchange portion 125 are arranged on the same outer side of the first heat exchange portion 111 in the circumferential direction. The third heat exchange section 13 and the fourth heat exchange portion 125 are respectively located at opposite ends of the first flow channel in the direction of fluid flow. When the third heat exchange section 13 and the fourth heat exchange portion 125 jointly exchange heat with the same area of ​​the battery assembly, the temperature difference at the edge of the battery assembly can be balanced, thereby improving the temperature uniformity at the edge of the battery assembly.

[0290] In the above technical solution, by setting the third heat exchange section 13 to extend along the first direction X in the direction away from the second heat exchange part 121, the heat exchange area of ​​the first heat exchange channel 10 can be increased, and the heat exchange effect of the first heat exchange channel 10 on the battery cell 102 can be improved; at the same time, when the third heat exchange section 13 and the fourth heat exchange part 125 jointly exchange heat with the battery assembly, the temperature difference in the edge area of ​​the battery assembly can be balanced, thereby improving the temperature uniformity at the edge of the battery assembly.

[0291] In some embodiments of the present application, referring to FIG. 7 and FIG. 12 , the third heat exchange segment 13 extends along the first direction X to a position close to one of the plurality of first heat exchange parts 111 that is farthest from the second heat exchange part 121 .

[0292] In the above technical solution, by setting the third heat exchange section 13 to extend along the first direction X to a position close to the 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.

[0293] According to some embodiments of the present application, referring to FIG. 7 and FIG. 12 , 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 .

[0294] The fourth bend 14 is arc-shaped, that is, it extends along an arc, and the fluid flow directions at both ends of the fourth bend 14 form a certain angle. As a result, the fourth bend 14 can change the fluid flow direction, thereby causing the third heat exchange section 13 to extend along a predetermined direction. Furthermore, the arc shape reduces fluid flow resistance and pressure drop, thereby increasing the fluid flow rate and further enhancing the heat exchange efficiency of the first heat exchange channel 10.

[0295] In the above technical solution, 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, reduce the pressure drop, increase the flow rate of the fluid, and further increase the heat exchange efficiency of the first heat exchange channel 10.

[0296] According to some embodiments of the present application, referring to FIG. 7 and FIG. 12 , the fourth bending portion 14 is in the shape of a quarter arc.

[0297] That is, the fourth bend 14 can extend along a semicircular arc. Specifically, the fourth bend 14 can extend along a quarter-circular arc that protrudes toward the connection between the second heat exchange portion 121 and the fourth heat exchange portion 125. The angle between the inlet and outlet of the fourth bend 14 is 90°. The fourth bend 14 is similar to a 90° elbow in a pipe material and can change the flow direction, causing the fluid flow direction to change by 90° after passing through the fourth bend 14.

[0298] Optionally, the fourth bend 14 can be semicircular. That is, the fourth bend 14 can extend along a semicircular arc, with the angle between the inlet and outlet of the fourth bend 14 being 180°, and the flow directions at the outlet and inlet of the fourth bend 14 being opposite. This brings the third heat exchange section 13 and the first heat exchange section 111 closer together, making the structure of the third heat exchange section 13 and the first heat exchange section 111 more compact and reliable. In other embodiments, the degree of curvature of the fourth bend 14 can be adjusted as needed, for example, to 150°, 135°, etc., and the embodiments of the present application are not limited thereto.

[0299] Furthermore, the fourth bend 14 connects the third heat exchange section 13 and the first heat exchange section 111, and 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 second direction, and the third heat exchange section 13 extends along the first direction, and the first direction is perpendicular to the second direction.

[0300] In the above technical solution, by setting the fourth bend 14 to be a quarter arc shape, the flow direction of the fluid can be changed from the original flow direction to perpendicular to the original flow direction after passing through the fourth bend 14; at the same time, the arc shape can also reduce the resistance to fluid flow, so that the fluid can flow smoothly in the fourth bend 14, effectively preventing the fluid from flowing too slowly and causing a decrease in heat exchange efficiency.

[0301] In some embodiments of the present application, referring to FIG. 7 , the fixing member 25 is connected to the fourth bending portion 14 or a portion of the first heat exchange portion 111 close to the fourth bending portion 14 .

[0302] It can be understood that the fixing member 25 can be connected to the fourth bend 14, or the fixing member 25 can be connected to the portion of the first heat exchange member 111 near the fourth bend 14. This can provide a restraining and limiting effect on the area where the fourth bend 14 is located, reducing the probability of separation between the fourth bend 14 and the box body 200 or loose glue pressing, improving the stability of the heat exchange fluid when flowing through the fourth bend 14, and helping to improve the working reliability of the first heat exchange member 100, thereby improving the reliability of the battery 1.

[0303] In the above technical solution, by arranging a fixing part 25 to connect the fourth bending part 14 or the part of the first heat exchange part 111 close to the fourth bending part 14, the probability of debonding or loose glue pressing between the fourth bending part 14 and the box body 200 can be reduced, and the heat exchange reliability between the heat exchange fluid and the battery cell 102 when flowing through the fourth bending part 14 can be improved, thereby improving the reliability of the battery 1.

[0304] In some embodiments of the present application, referring to Figures 7 and 12, the first heat exchange channel 10 also includes: a first entrance and exit section 15, one end of the first entrance and exit section 15 is connected to the third heat exchange section 13 at an angle, and the other end of the first entrance and exit section 15 forms a first entrance and exit of the first heat exchange channel 10; and the first entrance and exit section 15 extends along the second direction Y in a direction away from the first heat exchange section 11, and the third heat exchange section 13 is extended along the first direction X.

[0305] Among them, the first inlet and outlet are used for the inlet or outlet of the heat exchange fluid. When the first inlet and outlet are used for the inlet of the heat exchange fluid, the first inlet and outlet section 15 is used to transport the heat exchange fluid to the third heat exchange section 13; when the first inlet and outlet are used for the outlet of the heat exchange fluid, the first inlet and outlet section 15 is used to guide the heat exchange fluid after heat exchange into the first heat exchange channel 10 through the first inlet and outlet.

[0306] The first inlet / outlet section 15 is connected to the third heat exchange section 13 at an angle. For example, the first inlet / outlet section 15 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°. For example, the angle between the first inlet / outlet section 15 and the third heat exchange section 13 is 30°, 45°, 60°, 90°, 120°, 135°, or 150°, etc.

[0307] A certain angle is formed between the first inlet and outlet section 15 and the third heat exchange section 13 , thereby forming a certain space on the side of the third heat exchange section 13 facing the first inlet and outlet section 15 , which is beneficial to the layout of other components in the battery 1 .

[0308] In the above technical solution, the provision of the first inlet and outlet section 15 facilitates external piping, allowing heat exchange medium to enter or exit the first heat exchange channel 10. It also guides the heat exchange fluid entering or exiting the first heat exchange channel 10, allowing the heat exchange fluid to enter or exit quickly, thereby increasing the heat exchange rate. By extending the first inlet and outlet section 15 along the second direction Y away from the first heat exchange section 11, the piping layout of the first heat exchange channel 10 can be more rationalized and facilitated connection to external piping. Furthermore, the first inlet and outlet can be positioned away from the battery assembly, which helps reduce the risk of damage to the battery assembly due to leakage from the first inlet and outlet.

[0309] According to some embodiments of the present application, referring to FIG. 7 and FIG. 12 , the second heat exchange section 12 further includes: a sixth bending portion 126 , which is connected between the fourth heat exchange portion 125 and the second heat exchange portion 121 .

[0310] The sixth bend 126 is formed into an arc shape, that is, it extends along an arc, and the fluid flow directions at both ends of the sixth bend 126 form a certain angle. As a result, the sixth bend 126 can change the flow direction of the heat exchange fluid, thereby allowing the second heat exchange portion 121 and the fourth heat exchange portion 125 to extend along a predetermined direction. At the same time, the arc-shaped sixth bend 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 improving the heat exchange efficiency of the first heat exchange channel 10.

[0311] In the above technical solution, 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.

[0312] According to some embodiments of the present application, referring to FIG. 7 and FIG. 12 , the sixth bending portion 126 is in the shape of a quarter circle.

[0313] That is, the sixth bend 126 can extend along a semicircular arc. Specifically, the sixth bend 126 can extend along a quarter-circular arc that is convex away from the first heat exchange section 11. The angle between the inlet and outlet of the sixth bend 126 is 90°. The sixth bend 126 is similar to a 90° elbow in a pipe material and can change the flow direction, causing the fluid flow direction to change by 90° after passing through the sixth bend 126.

[0314] Optionally, the sixth bend 126 can be semicircular. That is, the sixth bend 126 can extend along a semicircular arc, with the angle between the inlet and outlet of the sixth bend 126 being 180°, and the flow directions at the outlet and inlet of the sixth bend 126 being opposite. This brings the fourth heat exchange section 125 and the second heat exchange section 121 closer together, making the structures of the fourth heat exchange section 125 and the second heat exchange section 121 more compact and reliable. In other embodiments, the degree of bend of the sixth bend 126 can be adjusted as needed, for example, to 150°, 135°, etc., and the embodiments of the present application are not limited thereto.

[0315] Furthermore, the sixth bent portion 126 connects the second heat exchange portion 121 and the fourth heat exchange portion 125 . At this time, the second heat exchange portion 121 and the fourth heat exchange portion 125 are arranged vertically.

[0316] In the above technical solution, by setting the sixth bend 126 to be a quarter arc shape, the flow direction of the fluid can be changed from the original flow direction to perpendicular to the original flow direction after passing through the sixth bend 126; at the same time, the arc shape can further reduce the resistance to fluid flow, so that the fluid can flow smoothly in the sixth bend 126, effectively preventing the fluid from flowing too slowly and causing a decrease in heat exchange efficiency.

[0317] In some embodiments of the present application, referring to FIG. 7 , the fixing member 25 is connected to the sixth bending portion 126 or a portion of the second heat exchange portion 121 close to the sixth bending portion 126 .

[0318] It can be understood that the fixing member 25 can be connected to the sixth bend 126, or the fixing member 25 can be connected to the portion of the second heat exchange member 121 near the sixth bend 126 (see Figures 7 and 12). As a result, the fixing member 25 can provide a restraining and limiting effect on the area where the sixth bend 126 is located, reducing the probability of the sixth bend 126 being separated from the box body 200 or the possibility of loose glue, improving the stability of the heat exchange fluid when flowing through the sixth bend 126, and thus improving the operating reliability of the first heat exchange member 100, thereby improving the reliability of the battery 1.

[0319] In the above technical solution, by arranging a fixing part 25 to connect the sixth bending part 126 or the part of the second heat exchange part 121 close to the sixth bending part 126, the probability of debonding or loose glue pressing between the location of the sixth bending part 126 and the box body 200 can be reduced, and the heat exchange reliability between the heat exchange fluid and the battery cell 102 when flowing through the sixth bending part 126 can be improved, thereby improving the reliability of the battery 1.

[0320] In some embodiments of the present application, referring to Figures 7 and 12, the first heat exchange channel 10 also includes: a second inlet and outlet section 17, one end of the second inlet and outlet section 17 is connected to the fourth heat exchange part 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 the second inlet and outlet section 17 extends along the second direction Y in a direction away from the first heat exchange section 11, and the fourth heat exchange part 125 is extended along the first direction X.

[0321] The second inlet and outlet are used for the inlet and outlet of the heat exchange fluid. When the second inlet and outlet are used for the inlet of the heat exchange fluid, the second inlet and outlet section 17 is used to transport the heat exchange fluid to the third heat exchange section 13. When the second inlet and outlet are used for the outlet of the heat exchange fluid, the second inlet and outlet section 17 is used to guide the heat exchange fluid after heat exchange into the first heat exchange channel 10 through the second inlet and outlet.

[0322] The second inlet / outlet section 17 is connected to the fourth heat exchange portion 125 at an angle. For example, the second inlet / outlet section 17 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 second inlet / outlet section 17 and the fourth heat exchange portion 125 is 30°, 45°, 60°, 90°, 120°, 135°, or 150°, etc.

[0323] It can be understood that a certain angle is formed between the second inlet and outlet section 17 and the fourth heat exchange part 125. As a result, a certain space is formed on the side of the fourth heat exchange part 125 facing the second inlet and outlet section 17. This is beneficial to the layout of other components in the battery 1 (such as high-voltage boxes and other structures).

[0324] In the above technical solution, the provision of the second inlet and outlet section 17 facilitates external piping, allowing the heat exchange medium to enter or exit the first heat exchange channel 10, completing heat exchange with the battery cells 102. It also guides the heat exchange fluid entering or exiting the first heat exchange channel 10, allowing the heat exchange fluid to enter or exit quickly, thereby increasing the heat exchange rate. By extending the second inlet and outlet section 17 along the second direction Y away from the first heat exchange section 11, the piping layout of the first heat exchange channel 10 can be more rationalized and facilitated connection to external piping. Furthermore, the second inlet and outlet can be positioned away from the battery assembly, which helps reduce the risk of damage to the battery assembly due to leakage at the second inlet and outlet.

[0325] According to some embodiments of the present application, referring to FIG. 7 and FIG. 12 , the first heat exchange channel 10 further includes: 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 .

[0326] Among them, the seventh bend 18 is arc-shaped, that is, the seventh bend 18 has a certain angle, thus, the seventh bend 18 is bent and connected between the fourth heat exchange part 125 and the second inlet and outlet section 17, which can realize the connection between the fourth heat exchange part 125 and the second inlet and outlet section 17, so that the heat exchange fluid can flow smoothly from the fourth heat exchange part 125 to the second inlet and outlet section 17 or from the second inlet and outlet section 17 to the fourth heat exchange part 125, realizing the liquid inlet or liquid outlet of the second inlet and outlet section 17; 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.

[0327] In the above technical solution, by setting the seventh bend 18, the heat exchange fluid can flow smoothly from the fourth heat exchange part 125 to the second inlet and outlet section 17 or from the second inlet and outlet section 17 to the fourth heat exchange part 125, thereby realizing the liquid inlet or liquid outlet of the second inlet and outlet section 17; at the same time, the arc shape of the seventh bend 18 can also reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the heat exchange fluid and further increasing the heat exchange efficiency of the first heat exchange channel 10.

[0328] According to some embodiments of the present application, referring to Figures 7 and 12 , the seventh bend 18 is arc-shaped, and the central angle corresponding to the seventh bend 18 is greater than or equal to 90° and less than 180°. For example, the central angle corresponding to the seventh bend 18 can be 90°, 120°, 150°, or 170°.

[0329] In the above technical solution, by setting the seventh bend 18 to be arc-shaped, the resistance to fluid flow can be further reduced, so that the fluid can flow smoothly in the seventh bend 18, effectively preventing the fluid from flowing too slowly and causing a decrease in heat exchange efficiency; 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 also be formed on the side of the fourth heat exchange part 125 toward the second entrance and exit section 17, which can be beneficial to the layout of other components in the battery 1 and improve the rationality of the layout of the battery 1.

[0330] According to some embodiments of the present application, the first heat exchange section 11 is connected to the downstream of the second heat exchange section 12 along the fluid flow direction. In other words, the heat exchange fluid first flows through the second heat exchange section 12 and then flows into the first heat exchange section 11, 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 composed of multiple rows of battery cells 102, due to the rapid heat dissipation of the peripheral temperature of the battery assembly, especially under low-temperature heating conditions, the high-temperature heat exchange fluid starts to exchange heat from the second heat exchange section 12, which can enable the first heat exchange channel 10 to preferentially exchange heat with the outer circumference of the battery assembly, thereby facilitating improvement of the temperature difference between the inside and outside of the battery assembly, thereby improving the service life of the battery 1 to a certain extent.

[0331] In the above technical solution, 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 1, which is beneficial to improving the temperature difference of the battery 1 in different environments and increasing the service life of the battery 1 to a certain extent.

[0332] According to some embodiments of the present application, the first heat exchange element 100 is configured as follows: when heating the battery assembly of the battery 1, 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 of the battery 1, the first heat exchange section 11 is connected to the upstream of the second heat exchange section 12 along the fluid flow direction.

[0333] Specifically, when heating the battery assembly of battery 1, the temperature of the heat exchange fluid flowing in the first heat exchange element 100 is higher than the operating temperature of battery 1. The first heat exchange element 100 heats the battery assembly, 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.

[0334] Since the high-temperature fluid first enters the second heat exchange section 12 located outside the first heat exchange channel 10, the second heat exchange section 12 can first heat the battery cells 102 outside the battery assembly, and then cool the battery cells 102 in the middle of the battery assembly after the heat exchange fluid enters the first heat exchange section 11. Since the battery cells 102 at the periphery of the battery 1 dissipate more heat to the external environment, the temperature of the battery cells 102 at the periphery of the battery 1 drops more. The heat exchange fluid first heats the battery cells 102 at the periphery of the battery 1. The higher temperature heat exchange fluid can increase the temperature of the battery cells 102 at the periphery while compensating for the heat lost by the battery cells 102 due to heat dissipation to the external environment, thereby meeting their heating needs. The battery cells 102 at the middle position of the battery assembly have less 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 102 themselves to well meet their heating needs. As a result, the heating effects obtained by the battery cells 102 at the periphery of the battery assembly and the battery cells 102 at the middle position of the battery assembly are basically the same, and the temperatures of the battery cells 102 at the periphery of the battery assembly and the battery cells 102 at the middle position of the battery assembly after heating are relatively consistent, making the temperature distribution in the battery 1 more uniform.

[0335] When cooling the battery components of the battery 1, the temperature of the heat exchange fluid flowing in the first heat exchange element 100 is lower than the operating temperature of the battery 1. The first heat exchange element 100 is used to cool the battery 1. 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.

[0336] When cooling the battery 1, 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 of the battery assembly to the edge of the battery assembly and exchanges heat. Since the heat dissipation of the battery cells 102 at the periphery of the battery 1 is better than that of the internal battery cells 102, the lower temperature of the heat exchange fluid in the first heat exchange section 11 can better meet the heat dissipation requirements of the battery cells 102 at the center of the battery 1. Furthermore, since the battery cells 102 at the periphery of the battery assembly can naturally dissipate heat directly to 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 102. As a result, the cooling effect achieved by the battery cells 102 at the periphery of the battery 1 and the battery cells 102 at the center of the battery 1 are substantially the same. Consequently, the temperatures of the battery cells 102 at the periphery of the battery 1 and the battery cells 102 at the center of the battery 1 are relatively consistent after cooling and heat dissipation, reducing the temperature difference between the inside and outside of the battery assembly and achieving a more uniform temperature distribution within the battery 1.

[0337] In the above technical solution, the first heat exchange element 100 is configured as follows: when heating the battery assembly of the battery 1, 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 of the battery 1, 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 1 and improve the temperature uniformity of the battery assembly.

[0338] In some embodiments of the present application, the first heat exchange element 100 has one or more heat exchange channels. When the number of heat exchange channels is multiple, the multiple heat exchange channels are arranged at intervals along the first direction X or arranged around each other, and at least one heat exchange channel forms a first heat exchange channel 10.

[0339] It is understandable that the number of heat exchange channels of the first heat exchange element 100 may be one, two, three, four, or more. When there are multiple heat exchange channels, one of the multiple heat exchange channels may be formed as the first heat exchange channel 10, or two, three, four, or more heat exchange channels may be formed as the first heat exchange channel 10, or all of the multiple heat exchange channels may be formed as the first heat exchange channel 10.

[0340] In some specific embodiments, a plurality of heat exchange channels are arranged at intervals along the first direction. For example, as shown in Figures 7 and 12, the first heat exchange element 100 may include two heat exchange channels, and the two first heat exchange channels 10 are arranged at intervals along the first direction. Furthermore, the two heat exchange channels may both be formed as first heat exchange channels 10. For another example, the first heat exchange element 100 may include three heat exchange channels, and the three heat exchange channels are arranged in sequence along the first direction. Furthermore, two of the three heat exchange channels are first heat exchange channels 10, and one is a second heat exchange channel, and the second heat exchange channel is arranged between the two first heat exchange channels 10.

[0341] In the above-mentioned embodiment, by providing the first heat exchange element 100 with one or more heat exchange channels, and the multiple heat exchange channels are arranged at intervals along the first direction or arranged around each other, the diversity of the heat exchange channels can be increased, thereby improving the adaptability of the first heat exchange element 100, so that it can meet the needs of different batteries 1, thereby improving the market competitiveness of the battery 1; at the same time, the multiple heat exchange channels are arranged in parallel, so that the multiple heat exchange channels can exchange heat at the same time, thereby reducing the heat exchange time of the first heat exchange element 100 and improving the heat exchange efficiency.

[0342] In some embodiments of the present application, referring to FIG. 12 , a plurality of heat exchange channels are symmetrically arranged about a center line of the first heat exchange element 100 along a second direction Y, and the second direction Y is arranged at an angle to the first direction X.

[0343] 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 first 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 first heat exchange element 100 is consistent, thereby improving the temperature consistency of the heat exchange areas of the battery assembly corresponding to the two parts of the first heat exchange element 100, thereby further improving the temperature uniformity of the battery assembly.

[0344] In the above embodiment, by arranging multiple heat exchange channels symmetrically about the center line of the first heat exchange element 100 along the second direction Y, the multiple heat exchange channels can synchronously exchange heat with the battery assembly to improve the heat exchange efficiency. At the same time, it can also improve the temperature consistency of the two symmetrically arranged heat exchange areas of the battery assembly and the first heat exchange element 100, thereby further improving the temperature uniformity effect of the battery assembly.

[0345] The following describes the mounting member 193 according to an embodiment of the present application with reference to Figures 13 to 16. Figure 13 is a schematic diagram of the three-dimensional structure of the first heat exchange member 100 according to another embodiment of the present application. Figure 14 is an enlarged view of the circled area II in Figure 13. Figure 15 is a schematic diagram of the three-dimensional structure of the first heat exchange member 100 from another angle. Figure 16 is an enlarged view of the partial structure of Figure 15.

[0346] In some embodiments of the present application, referring to Figures 13 to 16, the first heat exchange member 100 includes: a first tube portion 191, a second tube portion 192 and a mounting member 193, the inlet end of the first tube portion 191 is formed as a first inlet and outlet of the heat exchange channel; the outlet end of the second tube portion 192 is formed as a second inlet and outlet of the heat exchange channel; the mounting member 193 is configured to be sealed and connected to the box body 200, and a through hole 1933a is formed on the mounting member 193 to connect the spaces on both sides of the mounting member 193, and the first tube portion 191 and / or the second tube portion 192 pass through the through hole 1933a and are sealed and connected to the through hole 1933a.

[0347] One end of the first tube portion 191 is formed as a first inlet and outlet of the heat exchange channel; one end of the second tube portion 192 is formed as a second inlet and outlet of the heat exchange channel.

[0348] Specifically, the first tube portion 191 and the second tube portion 192 are mainly used for the fluid collector 20, and are used to supply heat exchange fluid to the heat exchange flow channel or discharge the heat exchange fluid after heat exchange, so that the heat exchange element 100 can achieve heat exchange. Among them, the first inlet and outlet and the second inlet and outlet can both be used for the inlet and outlet of the heat exchange fluid. When the first inlet and outlet serves as the inlet end of the heat exchange fluid, the second inlet and outlet serves as the outlet end of the heat exchange fluid; when the first inlet and outlet serves as the outlet end of the heat exchange fluid, the second inlet and outlet serves as the inlet end of the heat exchange fluid.

[0349] The mounting member 193 is configured to be sealed with the battery 1 housing 200. A through hole 1933a is formed on the mounting member 193, connecting the spaces on both sides of the mounting member 193. The first tube portion 191 and / or the second tube portion 192 passes through the through hole 1933a and is sealedly connected to the periphery of the through hole 1933a. In other words, at least one of the first tube portion 191 and the second tube portion 192 passes through the through hole 1933a and is sealedly connected to the through hole 1933a.

[0350] Specifically, the spaces on both sides of the mounting member 193 are respectively the space for placing the first heat exchange member 100 and the space for connecting the first inlet and outlet and the second inlet and outlet to the external pipeline, wherein the mounting member 193 is configured to be sealed and connected to the box body 200 of the battery 1, thereby making the spaces on both sides of the mounting member 193 independent of each other. In this way, when leakage occurs at the connection between the first inlet and outlet and the second inlet and outlet and the current collector 20, the heat exchange fluid will not enter the space for placing the first heat exchange member 100, thereby effectively reducing the risk of corrosion of the first heat exchange member 100.

[0351] In the prior art, in order to reduce the risk of corrosion of the first heat exchanger 100, the gap between the first tube portion 191, the second tube portion 192 and the box body 200 is usually sealed. This requires a large amount of sealing structural adhesive and requires more manpower, resulting in low production efficiency and high production cost of the battery 1.

[0352] In the above technical solution, after the mounting member 193 is sealed with the first tube portion 191 and the second tube portion 192, the mounting member 193 is then sealed with the box body 200. In this way, not only the structural strength at the position of the first tube portion 191 and the second tube portion 192 is increased, but also the labor and materials required for sealing are reduced. Therefore, the production rate of the battery 1 can be improved and the labor cost of producing the battery 1 can be reduced.

[0353] In the above embodiment, by providing the mounting member 193, it is no longer necessary to separately seal the first tube portion 191 and the second tube portion 192 with the box body 200 when assembling the battery 1. In this way, the labor and materials required for assembling the battery 1 can be reduced, thereby increasing the production rate of the battery 1 and reducing the labor cost of producing the battery 1.

[0354] In some embodiments of the present application, referring to Figures 6 and 13 to 19, the battery 1 further includes a protective plate 27, which is provided on a side of the first heat exchange member 100 away from the housing 200, and an outer peripheral surface of the protective plate 27 is sealedly connected to the housing 200, and together form a third cavity 101a for accommodating the first heat exchange member 100; the mounting member 193 has a cavity with an opening on one side, and a through hole 1933a passes through the bottom wall of the cavity opposite to the opening, and the mounting member 193 is suitable for being arranged between the housing 200 and the protective plate 27, and the outer peripheral surface of the mounting member 193 is suitable for being sealedly connected to the housing 200 and the protective plate 27.

[0355] The mounting member 193 has a cavity with one side open. It should be noted that the open side of the mounting member 193 can face one side of the space where the first entrance and the second entrance are located, or can face the space away from the first entrance and the second entrance.

[0356] Furthermore, the opening side of the mounting member 193 faces the space on one side away from the first and second inlets and outlets. For example, the opening of the cavity is set away from the current collector 20. In this way, dust and other impurities can be effectively prevented from accumulating in the mounting member 193.

[0357] The mounting member 193 is adapted to be positioned between the housing 200 and the guard plate 27. In other words, the first heat exchange element 100 is positioned between the bottom wall of the housing 200 and the guard plate 27, or on the outside of the housing 200. This effectively reduces damage to the battery cells 102 caused by leakage from the first heat exchange element 100. Furthermore, the guard plate 27, positioned on the underside of the housing 200, further enhances the structural strength of the bottom of the battery 1 and the bearing strength of the bottom plate 23. It also provides protection against bottom impacts, effectively reducing safety issues associated with multiple battery cells 102 and the first heat exchange element 100.

[0358] The outer peripheral surface of the mounting member 193 is suitable for sealing connection with the box body 200 and the guard plate 27. It should be noted that the outer peripheral surface of the mounting member 193 can be designed according to the specific structure of the box body 200 and the guard plate 27. For example, the bottom of the box body 200 and the guard plate 27 are both flat plates, and the outer peripheral surface of the mounting member 193 is also formed into a flat plate shape, so that it can be sealed and connected with the bottom plate 23 and the guard plate 27, thereby increasing the sealing performance of the bottom plate 23 and the guard plate 27.

[0359] For example, as shown in Figures 13 to 16, the mounting member 193 includes a first plate 1931, a second plate 1932 and a mounting plate 1933, the mounting plate 1933 is vertically arranged, the first plate 1931 is horizontally arranged and connected to one end of the mounting plate 1933 in the Z direction, the second plate 1932 is horizontally arranged and connected to the other end of the mounting plate 1933 in the Z direction, and the first plate 1931 and the second plate 1932 are located on the same side of the mounting plate 1933 in the thickness direction and are arranged at intervals along the Z direction, a plurality of through holes 1933a are formed on the mounting plate 1933, the plurality of through holes 1933a are respectively the first through hole and the second through hole, the first tube portion 191 is passed through the first through hole, and the second tube portion 192 is passed through the second through hole.

[0360] Furthermore, the first tube portion 191 is connected to the periphery of the first through hole by welding, and the second tube portion 192 is connected to the periphery of the second through hole by welding.

[0361] Furthermore, there are one or more first through holes, and the first through holes correspond one-to-one to the first tube portion 191. There are one or more second through holes, and the second through holes correspond one-to-one to the second tube portion 192.

[0362] Furthermore, one end of the first plate 1931 is connected to the mounting plate 1933 and the other end extends toward the first heat exchange section 11. One end of the second plate 1932 is connected to the mounting plate 1933 and the other end extends toward the first heat exchange section 11. Furthermore, in the direction from the mounting member 193 toward the first heat exchange section 11, the length of the first plate 1931 is different from the length of the second plate 1932. For example, the length of the first plate 1931 is less than the length of the second plate 1932. Specifically, the length of the first plate 1931 is less than two-thirds of the length of the second plate 1932.

[0363] Furthermore, the first plate 1931 , the second plate 1932 and the mounting plate 1933 are integrally formed.

[0364] Furthermore, the mounting member 193 further includes stoppers 1934, which are arranged at both ends of the mounting plate 1933 in the longitudinal direction (i.e., the first direction X in FIG. 16 ). The stoppers 1934 are connected and sealed to the mounting plate 1933, the first plate 1931, and the second plate 1932. For example, the stoppers 1934 can be welded or adhesively connected to the mounting plate 1933, the first plate 1931, and the second plate 1932. The mounting plate 1933, the first plate 1931, the second plate 1932, and the two stoppers 1934 enclose the cavity.

[0365] In which, referring to Figure 16, the side surface of the stop block 1934 facing away from the mounting plate 1933 is formed as a slope 1934a, the length of the first plate 1931 is less than the length of the second plate 1932, and the end of the slope 1934a facing the first plate 1931 is flush with the end of the first plate 1931 facing away from the mounting plate 1933, and in the direction from the first plate 1931 toward the second plate 1932, the other end of the slope 1934a extends obliquely to the end of the second plate 1932 facing away from the mounting plate 1933.

[0366] In addition, it should be noted that a sealing member is provided around the periphery of the first heat exchanger 100. The sealing member extends along the circumference of the first heat exchanger 100 and is annular in shape. Alternatively, the sealing member surrounds the first heat exchanger 100, and both ends of the sealing member are connected to the mounting member 193. The sealing member may be a sealant.

[0367] In the above embodiment, by setting the mounting member 193 as a cavity with an opening on one side, the overall weight of the mounting member 193 can be reduced, and the overall weight of the entire battery 1 can be reduced, thereby achieving lightweighting of the battery 1; at the same time, the mounting member 193 is suitable for being set between the box body 200 and the protective plate 27, so that the bottom of the box body 200 can isolate the first heat exchange member 100 and the multiple battery cells 102, thereby, when the first heat exchange member 100 is damaged, it will not affect the multiple battery cells 102, thereby reducing the cost of repairing the battery 1.

[0368] In some embodiments of the present application, referring to Figures 4, 6 and 17, the battery 1 further includes a protective plate 27, which is provided on a side of the first heat exchange element 100 away from the box body 200. The outer peripheral surface of the protective plate 27 is sealed with the box body 200, and together they form a third cavity 101a for accommodating the first heat exchange element 100; the battery 1 further includes a filler 28, which fills the gap between the first heat exchange element 100 and the third cavity 101a.

[0369] The protective plate 27 may refer to a plate that protects the first heat exchange element 100. When the battery 1 is impacted, the protective plate 27 can withstand the impact force, reducing damage to the first heat exchange element 100 caused by the impact, thereby improving the reliability of the first heat exchange element 100. For example, when the electrical device is a vehicle 1000, the battery 1 is arranged at the bottom of the vehicle. During the driving process of the vehicle 1000, the battery 1 is easily impacted by objects such as stones. Since the first heat exchange element 100 is arranged on the outside of the box 200, the protective plate 27 can withstand the impact of objects such as stones, reducing the probability of damage to the first heat exchange element 100 and providing better protection for the first heat exchange element 100.

[0370] Optionally, the guard plate 27 may be, but is not limited to, a metal part, a plastic part, etc. Exemplarily, the guard plate 27 may be a steel plate or an aluminum plate.

[0371] The position of the guard plate 27 on the housing 200 corresponds to the first heat exchange element 100. Referring to the foregoing, the housing 200 may include a housing 22, a bottom plate 23, and a top plate 24. When the first heat exchange element 100 is attached to the outside of the housing 22, the guard plate 27 is disposed on the side of the housing 200; when the first heat exchange element 100 is attached to the outside of the top plate 24, the guard plate 27 is disposed on the top of the housing 200; and when the first heat exchange element 100 is attached to the outside of the bottom plate 23, the guard plate 27 is disposed on the bottom of the housing 200 (see Figures 4, 5, and 6).

[0372] The third cavity 101a may refer to a closed space defined by the guard plate 27 and the housing 200. The first heat exchanger 100 is disposed in the third cavity 101a, thereby reducing external impacts and contact with water and dust in the external environment, thereby reducing the probability of damage to the first heat exchanger 100 and extending the service life of the first heat exchanger 100.

[0373] Filler 28 may refer to a substance or material used to fill gaps and spaces between materials. For example, filler 28 may include, but is not limited to, plastic materials and foam materials. Alternatively, filler 28 may be a foam material, which may refer to a material having a closed or open cell structure. Filler 28 may include, but is not limited to, polystyrene foam and polyurethane foam.

[0374] Alternatively, the filler 28 may be a molded part and integrated onto the surface of the housing 200 on the side close to the first heat exchange element 100. For example, the filler 28 may be integrated onto one of the housing 22, the bottom plate 23, and the top plate 24. In this example, the first heat exchange element 100 may be mounted on the filler 28, and then the protective plate 27 may be mounted onto the housing 200. The filler 28 may also be integrated onto the surface of the protective plate 27 on the side close to the first heat exchange element 100. In this example, the first heat exchange element 100 may be mounted on the housing 200, and then the protective plate 27 may be mounted onto the housing 200.

[0375] 6 , 18 and 19 , the filler 28 may be provided with a mounting groove 28 b , and the first heat exchange element 100 is disposed in the mounting groove 28 b , thereby improving the installation reliability of the first heat exchange element 100 and the filler 28 .

[0376] Optionally, the guard plate 27 and the box body 200 may also be provided with an injection hole, and the filler 28 is a foam, which can be injected into the third cavity 101a through the injection hole, thereby filling the gap between the first heat exchange component 100 and the third cavity 101a, and forming after cooling.

[0377] In the above technical solution, by placing the guard plate 27 on the side of the first heat exchanger 100 away from the housing 200, the first heat exchanger 100 is protected and the probability of the first heat exchanger 100 being impacted is reduced. The filler 28 separates the first heat exchanger 100 from the guard plate 27 and acts as a buffer when the guard plate 27 is impacted, reducing damage to the first heat exchanger 100, thereby improving the reliability of the first heat exchanger 100. Furthermore, by placing the filler 28 in the gap between the first heat exchanger 100 and the third chamber 101a, the filler 28 acts on the first heat exchanger 100, the housing 200, and the guard plate 27, making the first heat exchanger 100 more securely mounted in the third chamber 101a, reducing the probability of displacement of the first heat exchanger 100 in the third chamber 101a, and improving the stability of the first heat exchanger 100. Secondly, the filler 28 can also play a role in heat preservation, reducing the probability of heat exchange between the first heat exchange component 100 and the protective plate 27 and the external environment, so that the first heat exchange component 100 can concentrate on heat exchange with the battery cell 102 in the accommodating cavity 21, which is beneficial to improving the heat exchange effect.

[0378] In some embodiments of the present application, referring to Figures 19, 20 and 21, the filler 28 is a filling layer, the filling layer has a first top surface 28a close to the side of the box body 200, the first heat exchanger 100 has a second top surface 100b close to the side of the box body 200, and the height of the second top surface 100b relative to the protective plate 27 is greater than the height of the first top surface 28a relative to the protective plate 27; the battery 1 also includes an adhesive 29, which is arranged on the first top surface 28a and the second top surface 100b.

[0379] The filling layer may refer to a layer of foam material. The first top surface 28a may refer to the surface of the filling layer close to the housing 200. For example, when the first heat exchange element 100 and the guard plate 27 are arranged at the bottom of the housing 200, the first top surface 28a is the upper surface of the filling layer.

[0380] The second top surface 100b may refer to the surface of the first heat exchange element 100 close to the housing 200. For example, when the first heat exchange element 100 and the guard plate 27 are arranged at the bottom of the housing 200, the second top surface 100b is the upper surface of the first heat exchange element 100.

[0381] The adhesive 29 may be a connecting member that uses an adhesive material to bond the filling layer and the first heat exchange element 100 to the housing 200 and seal the connection. The adhesive 29 may include but is not limited to glue, tape, adhesive, structural adhesive, and the like.

[0382] In the above technical solution, the second top surface 100b of the first heat exchange element 100 is arranged to protrude relative to the first top surface 28a of the filling layer. As a result, the gap between the first top surface 28a and the wall of the housing 200 is larger than the gap between the second top surface 100b and the wall of the housing 200. The thickness of the glue coating of the filling layer is greater than the thickness of the glue coating of the first heat exchange element 100. The thicker the glue coating of the filling layer, the better the connection reliability between the filling layer and the housing 200, thereby facilitating the installation reliability of the first heat exchange element 100. The thinner glue coating of the first heat exchange element 100 can, on the one hand, improve the connection reliability between the first heat exchange element 100 and the housing 200, and on the other hand, reduce the obstruction to the heat exchange of the first heat exchange element 100, thereby enhancing the heat exchange effect of the first heat exchange element 100 on the battery cells 102 in the housing 200, thereby facilitating the improvement of the heat exchange efficiency of the first heat exchange element 100.

[0383] In some embodiments of the present application, referring to FIG. 19 , the box body 200 is an integrally stamped part and includes a bottom wall 200 b and a surrounding wall 200 c .

[0384] The bottom wall 200b may refer to the bottom wall of the housing 200. The surrounding wall 200c may refer to the peripheral annular wall of the housing 200. The first heat exchange element 100 may be disposed on the outer side of the bottom wall 200b and / or the surrounding wall 200c.

[0385] In the related art, the water-cooling plate of the battery is arranged at the bottom of the frame and is used to close the opening at the bottom of the frame, serving as the bottom wall of the box. In this technical solution, a large number of fasteners (such as screws, up to several hundred in number) are required when assembling the cold plate and the frame, and sealants or gaskets are required to seal between the cold plate and the frame, which not only increases the manufacturing cost, but also poses a risk of sealing failure. In the above example solution, the box body 200 is an integral stamped part, which can reduce the sealing requirements. For example, the side of the box body 200 close to the first heat exchanger 100 does not need to be sealed, which can reduce the use of sealants and gaskets, reduce costs, and greatly reduce the probability of sealing failure, thereby improving the reliability of the battery 1.

[0386] Secondly, compared with the method of using fasteners to form a box structure of a cold plate and a frame, the box 200 of the present application is an integral stamped part, which has neither fasteners such as screws nor welds. The box 200 has better integrity, which is beneficial to reduce the probability of weak strength positions and can improve the structural strength and reliability of the box 200.

[0387] In the above technical solution, by configuring the housing 200 as an integral stamped part, the bottom and surrounding sides of the housing 200 are closed, which provides a high degree of sealing. After the first heat exchanger 100 is fitted and arranged on the outside of the housing 200, the sealing requirements for the housing 200 can be reduced, which is conducive to simplifying the assembly process and reducing manufacturing costs. Moreover, the housing 200 is an integral stamped part, which makes the housing 200 have a relatively high structural strength and a relatively low probability of deformation and impact damage, which is conducive to improving the reliability of the battery 1. In addition, since the housing 200 is an integral stamped part, the housing 200 has a relatively small wall thickness while having high strength, which can reduce the weight of the housing 200 and improve the volume energy density of the battery 1.

[0388] In some embodiments of the present application, referring to FIG. 7 , the first heat exchange element 100 includes a plurality of flat-mouth tubes connected in sequence, and a heat exchange channel is formed around the inner wall of each flat-mouth tube.

[0389] Flat-mouth pipes can refer to pipes with a flat shape or a narrow diameter and a long length. Flat-mouth pipes usually have an oval or rectangular cross-section.

[0390] The heat exchange channel may refer to a channel for circulating a heat exchange fluid. When the heat exchange fluid flows through the battery cell 102 along the heat exchange channel, it can exchange heat with the battery cell 102 to adjust the temperature of the battery 1 .

[0391] In the above technical solution, since the housing 200 is a one-piece stamped part, by configuring the first heat exchange element 100 to include multiple flat-end tubes, the structural arrangement of the first heat exchange element 100 and the housing 200 can be made more compact, resulting in more efficient space utilization. This helps reduce the volume of the housing 200 and increase the volumetric energy density of the battery 1. Furthermore, the flat-end tubes have good compressive strength, can withstand certain pressures and loads, and provide good pipe protection and structural support, thereby improving the reliability of the first heat exchange element 100.

[0392] In some embodiments of the present application, the flat-mouth tube includes one of a bent aluminum alloy tube, an aluminum alloy harmonica cold tube, an aluminum alloy stamped cold plate, and an aluminum alloy brazed cold plate.

[0393] In the above technical solution, by setting the flat-mouth tube to include one of a bent aluminum alloy tube, an aluminum alloy harmonica cold tube, an aluminum alloy stamped cold plate, and an aluminum alloy brazed cold plate, a variety of structures can be provided for the design of the flat-mouth tube, thereby improving the design flexibility and reducing the manufacturing difficulty.

[0394] According to some embodiments of the present application, the first heat exchange element 100 includes at least one heat exchange tube. When there are multiple heat exchange tubes, the multiple heat exchange tubes are arranged at intervals along the first direction, and a heat exchange channel is defined on the inner side of each heat exchange tube.

[0395] For example, the number of heat exchange tubes can be one, two, three or more, and the number of heat exchange tubes can be designed according to the size of the battery assembly.

[0396] Specifically, heat exchange channels are defined within the heat exchange tubes for circulating the heat exchange fluid. The heat exchange tubes can have various shapes, such as circular tubes and flat tubes. The heat exchange channels defined within the heat exchange tubes can also have various shapes, such as U-shaped channels and meandering channels.

[0397] Furthermore, the plurality of heat exchange tubes are arranged in parallel. For example, the inlet ends of the plurality of heat exchange tubes are connected to the diversion cavity of the collector 20 , and the outlet ends of the plurality of heat exchange tubes are all connected to the confluence cavity of the collector 20 .

[0398] The plurality of heat exchange tubes may be arranged sequentially along the first direction X. Of course, the plurality of heat exchange tubes may also be arranged around each other, and further, the plurality of heat exchange tubes may be arranged around each other in the same plane.

[0399] In the above-described embodiment, by configuring the first heat exchange element 100 to include at least one heat exchange tube, not only can the process complexity of the first heat exchange element 100 be reduced, thereby increasing the production rate of the first heat exchange element 100, but the fluid pressure drop within a single heat exchange tube can also be reduced, thereby improving heat exchange efficiency. Furthermore, a tubular structure is simpler, less expensive, and easier to manufacture than a plate-like structure.

[0400] According to some embodiments of the present application, the heat exchange tube can be formed by bending a single tube.

[0401] Single tube bending refers to the process of bending a single straight tube multiple times through a process such as rolling to form a heat exchange tube. For example, a single straight tube can be bent at multiple preset locations to form a V-shape, U-shape, or other shape. The bending shape of a single tube can be designed based on actual conditions.

[0402] 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 first heat exchange element 100 can be reduced, thereby reducing the risk of leakage of the first heat exchange element 100 and improving the reliability of the first heat exchange element 100; at the same time, the operation process of bending a single tube is simpler than the manufacturing process of the plate structure, thereby significantly reducing the cost of the first heat exchange element 100.

[0403] According to some embodiments of the present application, the heat exchange tube is bent in an arc shape at the bending position.

[0404] 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.

[0405] In the above embodiment, by setting the heat exchange tube to bend 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.

[0406] In some embodiments of the present application, referring to Figure 22, the battery 1 also includes a second heat exchange element 300, which is arranged in the accommodating cavity 21 and is fitted on at least one inner wall surface of the box body 200; wherein the structure of the second heat exchange element 300 is the same as or different from the structure of the first heat exchange element 100.

[0407] The second heat exchanger 300 may refer to a device or component used to transfer heat during a heat exchange process. The second heat exchanger 300 is typically used to transfer heat from one medium to another, achieving heat transfer and utilization. For example, the second heat exchanger 300 may be, but is not limited to, a radiator or cold plate. The second heat exchanger 300 may have the same structure as the first heat exchanger 100 or a different structure.

[0408] The inner wall surface of the housing 200 may refer to the wall surface located inside the accommodating cavity 21. The housing 200 may have multiple inner wall surfaces, and the number of inner wall surfaces may vary depending on the shape of the housing 200. For example, when the housing 200 is a rectangular parallelepiped or a cube, the housing 200 may have six inner wall surfaces, and the second heat exchange element 300 may be disposed on at least one of the top inner wall surface, the bottom inner wall surface, and the four side inner wall surfaces of the housing 200.

[0409] For example, the first heat exchange element 100 is attached to the outer side of the bottom wall of the box body 200, and the second heat exchange element 300 is attached between the four inner walls of the box body 200 and the battery cells 102. Thus, the first heat exchange element 100 can perform heat exchange with the bottom surface of the battery cells 102, and the second heat exchange element 300 can perform heat exchange with the outermost of the multiple battery cells 102, thereby improving the overall heat exchange efficiency of the battery cells 102 in the accommodating cavity 21.

[0410] In the above technical solution, the battery 1 can not only exchange heat with one side of the battery cell 102 in the box body 200 through the first heat exchange element 100, but also exchange heat with the other side of the battery cell 102 in the box body 200 through the second heat exchange element 300. That is to say, the second heat exchange element 300 and the first heat exchange element 100 can cooperate with each other to exchange heat with the battery cell 102, thereby being able to exchange heat with more sides of the battery cell 102, and increasing the heat exchange surface of the battery cell 102, which is beneficial to improving the heat exchange efficiency and greatly enhancing the heat exchange effect.

[0411] In some embodiments of the present application, referring to Figure 23, the battery 1 also includes a third heat exchange element 400, which is disposed in the accommodating cavity 21 and is used to be arranged between two adjacent battery cells 102; wherein the structure of the third heat exchange element 400 is the same as or different from the structure of the first heat exchange element 100.

[0412] The third heat exchange element 400 may refer to a device or component used to transfer heat during a heat exchange process. The third heat exchange element 400 is typically used to transfer heat from one medium to another, achieving heat transfer and utilization. For example, the third heat exchange element 400 may be, but is not limited to, a radiator or cold plate. The third heat exchange element 400 may have the same structure as the first heat exchange element 100 or a different structure.

[0413] The battery cells 102 can be arranged in one or more rows within the accommodating cavity 21. Referring to FIG6 , the battery cells 102 are arranged in multiple rows along the second direction Y of the housing 200, with multiple battery cells 102 in each row arranged along the first direction X. A third heat exchange element 400 can be disposed between two adjacent rows of battery cells 102, and the third heat exchange element 400 is disposed in contact with the two adjacent battery cells 102, thereby enabling the third heat exchange element 400 to exchange heat between the two adjacent battery cells 102.

[0414] Optionally, the battery 1 may include a first heat exchange element 100 and a third heat exchange element 400, wherein the first heat exchange element 100 is arranged on the outside of the wall of the box body 200 away from the accommodating cavity 21, and the third heat exchange element 400 is arranged between two adjacent battery cells 102, so that the battery cells 102 are heat exchanged through the two heat exchange elements.

[0415] Optionally, the battery 1 may also include a first heat exchange element 100, a second heat exchange element 300 and a third heat exchange element 400, the first heat exchange element 100 is fitted on the outer side of the wall of the box body 200 away from the accommodating cavity 21, the second heat exchange element 300 is fitted on the inner wall surface of the box body 200, and the third heat exchange element 400 is arranged between two adjacent battery cells 102, thereby exchanging heat with the battery cells 102 through three heat exchange elements.

[0416] In the above technical solution, the first heat exchange element 100 can perform heat exchange on the side surfaces of multiple battery cells 102 located on the same side in the box body 200, while the third heat exchange element 400 can perform heat exchange on the other side surface between two adjacent battery cells 102. Thus, the third heat exchange element 400 and the first heat exchange element 100 cooperate with each other to perform heat exchange on the two surfaces of the battery cell 102, thereby being able to perform heat exchange on more side surfaces of the battery cell 102, thereby increasing the heat exchange surface of the battery cell 102, which is beneficial to improving the heat exchange efficiency and greatly enhancing the heat exchange effect.

[0417] The battery 1 provided in accordance with an embodiment of the present application includes: a box body 22, a bottom plate 23, a first heat exchange component 100, and a beam body 103. The box body 22 is a frame structure, the bottom plate 23 is connected to the bottom of the box body 22, and the beam body 103 is arranged inside the box body 22. The box body 22, the bottom plate 23, and the beam body 103 constitute a cavity structure inside the box body 200 for accommodating the battery cell 102. The first heat exchange component 100 is a cold pipe, and is fitted on the outside of the bottom plate 23 so that the bottom plate 23 can physically isolate the cold pipe from the battery cell 102. The cold pipe is formed by bending a pipe, and a hollow structure is formed in the middle.

[0418] The chassis 22 and bottom plate 23 are both made of steel. The chassis 22 frame is 0.8mm to 2.0mm thick, while the bottom plate 23 is 0.4mm to 1.2mm thick. The bottom plate 23 and chassis 22 are welded together. The cooling pipes are located in the area of ​​the bottom plate 23 corresponding to the battery cells 102, which reduces the use of cooling pipe material and saves costs.

[0419] In some embodiments of the present application, referring to Figure 12, the first heat exchange element 100 includes a first heat exchange channel 10, and the first heat exchange channel 10 includes a plurality of heat exchange portions. The plurality of heat exchange portions are arranged at intervals along a first direction X and are connected in sequence. Each heat exchange portion extends linearly along a second direction Y, and the second direction Y is arranged at an angle to the first direction X. The battery 1 includes at least one row of battery cells 102, and each row of battery cells 102 is arranged in sequence along the second direction Y. The side of the battery cell 102 close to the first heat exchange element 100 corresponds to at least two heat exchange portions.

[0420] It can be understood that the first heat exchange element 100 can include multiple heat exchange channels, one of which can be recorded as the first heat exchange channel 10. The first heat exchange channel 10 can refer to a channel used to circulate heat exchange fluid to perform heat exchange and regulate the temperature of the battery cell 102.

[0421] The heat exchange part may refer to the first heat exchange part 111 and the second heat exchange part 121 mentioned above.

[0422] The side of the battery cell 102 close to the first heat exchange element 100 corresponds to at least two first heat exchange parts 111. It can be understood that the side of the battery cell 102 close to the first heat exchange element 100 is adhered to the first heat exchange parts 111 including but not limited to two, three, four, etc.

[0423] In the above technical solution, at least two heat exchange parts correspond to the side of the battery cell 102 close to the first heat exchange element 100, thereby increasing the heat exchange area between the battery cell 102 and the first heat exchange element 100, and quickly adjusting the temperature of the battery cell 102, thereby improving the heat exchange efficiency of the battery cell 102. The temperature adjustment of the battery cell 102 is faster, which can enhance the heat exchange effect of the battery cell 102 and thereby improve the reliability of the battery 1.

[0424] In a second aspect, an embodiment of the present application further provides an electrical device, comprising the battery 1 as described above.

[0425] In the above technical solution, battery 1 has excellent sealing and insulation properties and high reliability, so the electrical device using this battery 1 has high power reliability. Moreover, since battery 1 can eliminate most of the sealing and insulation structures of the casing 200, it can effectively reduce the overall manufacturing cost of battery 1 and increase the volumetric energy density of battery 1. Therefore, it can reduce the production cost of the electrical device and help extend the power supply life.

[0426] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0427] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery, wherein: The battery comprises: A box body having a receiving cavity; The first heat exchange component is arranged on the outer side of the wall of the box body away from the accommodating cavity and is used for heat exchange with the battery cell.

2. The battery according to claim 1, wherein The accommodating cavity includes a first cavity, the first cavity is used to accommodate the battery cell, the first heat exchange element has a heat exchange area for heat exchange, and the area of the projection outline of the orthographic projection of the heat exchange area on the side of the box body close to the first heat exchange element is greater than or equal to the projection surface area of the orthographic projection of the first cavity on the side of the box body close to the first heat exchange element, and is smaller than the area of the side of the box body close to the first heat exchange element.

3. The battery according to claim 2, wherein The accommodating cavity includes a second cavity for accommodating electrical components, and the orthographic projection of the second cavity on the side of the box body close to the first heat exchanger is located outside the orthographic projection of the heat exchange area on the side of the box body close to the first heat exchanger.

4. The battery according to any one of claims 1 to 3, wherein The box body includes a box body, a bottom plate and a top plate, the bottom plate and the top plate are connected to the box body, and the first heat exchange component is attached to the outer side of the bottom plate and / or the outer side of the top plate.

5. The battery according to claim 4, wherein The box body, the bottom plate and the top plate are made of steel or aluminum.

6. The battery according to claim 5, wherein When the box body, the bottom plate and the top plate are made of steel, the thickness of the box body is 0.8 mm to 2.0 mm.

7. The battery according to claim 6, wherein The thickness of the bottom plate and the top plate is 0.4 mm to 1.2 mm.

8. The battery according to claim 4, wherein When the box body, the bottom plate and the top plate are made of aluminum, the thickness of the box body is 1.0 mm to 5.0 mm.

9. The battery according to claim 8, wherein The thickness of the bottom plate and the top plate is 1.0 mm to 3.0 mm.

10. The battery according to any one of claims 4 to 9, wherein The bottom plate and the top plate are both connected to the box body by welding.

11. The battery according to any one of claims 1 to 10, wherein The battery further includes a fixing member, which is provided on the box body, is disposed close to at least one edge of the first heat exchange member, and is configured to securely connect the first heat exchange member and the box body.

12. The battery according to claim 11, wherein A first groove is provided on a wall of the box body close to the first heat exchange element, and the fixing element is at least partially located in the first groove.

13. The battery according to claim 12, wherein The box wall of the box body close to the first heat exchanger protrudes toward the inner side of the accommodating cavity to form a convex portion, and the surrounding wall of the protruding position of the convex portion forms the first groove; the battery also includes: a beam body, the beam body is arranged in the accommodating cavity, the beam body is provided with a second groove, and at least part of the convex portion is arranged in the second groove.

14. The battery according to any one of claims 11 to 13, wherein The first heat exchange element includes a first heat exchange channel, which includes a first heat exchange section and a second heat exchange section; the second heat exchange section is bent to form a U-shaped 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 fixing member is connected to the first heat exchange section and the second heat exchange section, and is arranged close to or corresponding to the bending parts of the first heat exchange section and the second heat exchange section.

15. The battery according to any one of claims 1 to 14, wherein The first heat exchange element includes a first heat exchange channel, which includes a first heat exchange section and a second heat exchange section; the second heat exchange section is bent to form a U-shaped 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.

16. The battery according to claim 15, wherein The first heat exchange section includes a plurality of first heat exchange parts, which are arranged at intervals along the first direction and are bent and connected in sequence. Each of the first heat exchange parts extends linearly along the second direction, and the first direction is set at an angle to the second direction.

17. The battery according to claim 15 or 16, wherein The second heat exchange section includes: a second heat exchange part, a third heat exchange part and a fourth heat exchange part. The second heat exchange part extends along the first side circumference of the first heat exchange section. The third heat exchange part is connected between the second heat exchange part and the first heat exchange section and extends along the second side circumference of the first heat exchange section. The first end of the third heat exchange part is connected to the second heat exchange part at an angle, and the second end of the third heat exchange part is connected to the first heat exchange section at an angle. The fourth heat exchange part is communicated with the second heat exchange part, connected to the second heat exchange part at an angle, and extends along the third side circumference of the first heat exchange section.

18. The battery according to claim 17, wherein The first heat exchange section includes a plurality of first heat exchange parts, and the plurality of first heat exchange parts are bent and connected in sequence in the first direction; wherein, The second heat exchange portion is located on one side of the plurality of first heat exchange portions along the first direction, and the third heat exchange portion is located on one side of the plurality of first heat exchange portions along the second direction, and the first direction and the second direction are arranged at an angle; the first end of the third heat exchange portion is aligned with the second heat exchange portion along the first direction. The first heat exchange section is connected to one end of the second heat exchange section in the second direction, the second end of the third heat exchange section is connected to one of the multiple first heat exchange sections that is farthest from the second heat exchange section along the first direction, the fourth heat exchange section is located on the other side of the multiple first heat exchange sections along the second direction, one end of the fourth heat exchange section is connected to one end of the second heat exchange section away from the third heat exchange section, and the other end of the fourth heat exchange section extends along the first direction toward a direction away from the second heat exchange section.

19. The battery according to claim 18, wherein The third heat exchange portion and the fourth heat exchange portion are extended along a first direction, and the first heat exchange portion and the second heat exchange portion are both extended along a second direction.

20. The battery according to claim 19, wherein The fourth heat exchange portion extends along the first direction and extends to a position close to one of the plurality of first heat exchange portions that is farthest from the second heat exchange portion.

21. The battery according to any one of claims 17 to 20, wherein The first heat exchange channel further includes: a third heat exchange section, the first heat exchange section is connected between the third heat exchange section and the second heat exchange section, and the third heat exchange section is connected to the first heat exchange section at an angle.

22. The battery according to claim 21, wherein The first heat exchange section includes a plurality of first heat exchange parts, and the plurality of first heat exchange parts are bent and connected in sequence in a first direction; The third heat exchange section is arranged on a side of the first heat exchange section away from the third heat exchange part, and the third heat exchange section is connected to one of the plurality of first heat exchange parts that is closest to the second heat exchange part along the first direction.

23. The battery according to claim 22, wherein The third heat exchange section extends along the first direction toward a direction away from the second heat exchange portion, and the first heat exchange portion extends along the second direction, wherein the first direction and the second direction are arranged at an angle.

24. The battery according to claim 23, wherein The third heat exchange section extends along the first direction to a position close to one of the plurality of first heat exchange parts that is farthest from the second heat exchange part.

25. The battery according to any one of claims 21 to 23, wherein The first heat exchange channel also includes: a first inlet and outlet section, one end of the first inlet and outlet section is connected to the third heat exchange section at an angle, and the other end of the first inlet and outlet section forms a first inlet and outlet of the first heat exchange channel; and the first inlet and outlet section extends along the second direction away from the first heat exchange section, and the third heat exchange section is extended along the first direction.

26. The battery according to any one of claims 17 to 25, wherein The first heat exchange channel also includes: a second inlet and outlet section, one end of the second inlet and outlet section is connected to the fourth heat exchange part at an angle, and the other end of the second inlet and outlet section forms a second inlet and outlet of the first heat exchange channel; and the second inlet and outlet section extends along the second direction away from the first heat exchange section, and the fourth heat exchange part is extended along the first direction.

27. The battery according to any one of claims 14 to 26, wherein The first heat exchange element has one or more heat exchange channels. When there are multiple heat exchange channels, the multiple heat exchange channels are arranged at intervals along the first direction or arranged around each other, and at least one heat exchange channel forms the first heat exchange channel.

28. The battery according to claim 27, wherein The plurality of heat exchange channels are symmetrically arranged about a center line of the first heat exchange element along a second direction, and the second direction is arranged at an angle to the first direction.

29. The battery according to claim 27 or 28, wherein The first heat exchange element comprises: First tube The inlet end of the first pipe portion is formed as a first inlet and outlet of the heat exchange channel; a second pipe portion, wherein an outlet end of the second pipe portion is formed as a second inlet and outlet of the heat exchange channel; The mounting member is configured to be sealed and connected to the box body. A through hole is formed on the mounting member to communicate with the spaces on both sides of the mounting member. The first tube part and / or the second tube part passes through the through hole and is sealed and connected to the through hole.

30. The battery according to claim 29, wherein The battery also includes a protective plate, which is arranged on a side of the first heat exchange element away from the box body, and the outer peripheral surface of the protective plate is sealed with the box body, and together they form a third cavity for accommodating the first heat exchange element; the mounting member has a cavity with an opening on one side, and the through hole passes through the bottom wall of the cavity opposite to the opening. The mounting member is suitable for being arranged between the box body and the protective plate, and the outer peripheral surface of the mounting member is suitable for being sealed with the box body and the protective plate.

31. The battery according to any one of claims 1 to 30, wherein The battery also includes a protective plate, which is arranged on a side of the first heat exchange element away from the box body. The outer peripheral surface of the protective plate is sealed with the box body, and together they form a third cavity for accommodating the first heat exchange element; the battery also includes a filler, which is filled in the gap between the first heat exchange element and the third cavity.

32. The battery according to claim 31, wherein The filler is a filling layer and is provided on the guard plate. The filling layer has a first top surface close to one side of the box body. The first heat exchange component has a second top surface close to one side of the box body. The height of the second top surface relative to the guard plate is greater than the height of the first top surface relative to the guard plate. The battery also includes an adhesive component, which is provided on the first top surface and the second top surface.

33. The battery according to any one of claims 1 to 32, wherein The box body is an integral stamped part and comprises a bottom wall and a surrounding wall.

34. The battery according to claim 33, wherein The first heat exchange component includes a plurality of flat-mouth tubes connected in sequence, and a heat exchange channel is formed on the inner wall of each flat-mouth tube.

35. The battery according to claim 34, wherein The flat-mouth tube comprises one of a bent aluminum alloy tube, an aluminum alloy harmonica cold tube, an aluminum alloy stamped cold plate, and an aluminum alloy brazed cold plate.

36. The battery according to any one of claims 1 to 35, wherein The battery further includes a second heat exchange member, which is disposed in the accommodating cavity and is attached to at least one inner wall surface of the box body; wherein the structure of the second heat exchange member is the same as or different from that of the first heat exchange member.

37. The battery according to any one of claims 1 to 36, wherein The battery further includes a third heat exchange element, which is disposed in the accommodating cavity and is used to be arranged between two adjacent battery cells; wherein the structure of the third heat exchange element is the same as or different from that of the first heat exchange element.

38. The battery according to any one of claims 1 to 37, wherein The first heat exchange member includes a first heat exchange channel, the first heat exchange channel includes a plurality of heat exchange portions, the plurality of heat exchange portions are arranged at intervals along a first direction and are sequentially connected, each heat exchange portion extends linearly along a second direction, and the second direction is arranged at an angle to the first direction; The battery includes at least one row of battery cells, and the battery cells in each row are arranged in sequence along the second direction. A side of the battery cell close to the first heat exchange element corresponds to at least two of the heat exchange parts.

39. An electrical device, wherein: Comprising a battery as claimed in any one of claims 1 to 38.

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