Battery and electrical device

Abstract

A battery (100) and an electrical device (1000). The battery (100) comprises: a case assembly (20), which comprises a case (21), the case (21) being an integrally stamped part having a bottom wall (211) and a surrounding wall (212); and a battery cell assembly (101), which is arranged in the case assembly (20) and is fixedly connected to the bottom wall (211) of the case (21); and a first heat exchange assembly (30), which is arranged in the case assembly (20) and exchanges heat with the battery cell assembly (101). The sealing effect and structural strength of the case (21) can be improved, thus improving the reliability of the battery (100); in addition, the cost can be reduced, and the production efficiency can be improved.

Description

Batteries and electrical devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202410172495.X 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 batteries, and in particular to a battery and an electrical device. Background Art

[0004] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0005] The battery box in the related art has poor sealing performance, resulting in low reliability of the battery.

[0006] Summary of the Invention

[0007] In view of the above problems, the present application provides a battery and an electrical device, which can improve the sealing and structural strength of the box and enhance the reliability of the battery.

[0008] In the first aspect, the present application provides a battery, comprising: a box assembly, a battery cell assembly and a first heat exchange assembly, the box assembly comprising a box, the box being an integral stamped part having a bottom wall and a surrounding wall; the battery cell assembly is arranged in the box assembly and fixedly connected to the bottom wall of the box; the first heat exchange assembly is arranged in the box assembly and exchanges heat with the battery cell assembly.

[0009] In the technical solution of the embodiment of the present application, since the bottom wall and the surrounding wall of the box body are integrally stamped and formed, there is no need to consider the sealing problem at the connection between the bottom wall and the surrounding wall, which can improve the sealing effect, thereby preventing muddy water from seeping into the box body from the connection between the bottom wall and the surrounding wall and affecting the battery cell components in the box body, thereby improving the reliability of the battery. In addition, the integrally stamped box body does not need to be spliced. On the one hand, it can save a large number of bolts on the original profile box body, reducing costs. On the other hand, it saves the connection steps and can improve production efficiency. In addition, the integrally stamped box body can prevent the substances ejected when the battery has thermal runaway and the heat exchange fluid leaked from the first heat exchange component from flowing outside the box body, which can reduce the direct contact between the human body and the leaked substances, protect personal safety, and reduce environmental pollution.

[0010] In some embodiments, the first heat exchange assembly includes a first heat exchange part, which includes: a heat exchange body, which is at least partially arranged between the bottom wall of the box and the battery core assembly, and has a heat exchange flow channel; a current collector, which is connected to the heat exchange flow channel.

[0011] In the above technical solution, the heat exchange body of the first heat exchange element is at least partially arranged between the bottom wall of the box and the battery cell assembly, so that the heat exchange body of the first heat exchange element is in direct contact with the bottom of the battery cell assembly. The heat exchange body can exchange heat with each battery cell of the battery cell assembly, which is beneficial to improving the heat exchange efficiency.

[0012] In some embodiments, the inner surface of the bottom wall of the box body has an accommodating groove, and the heat exchange body is at least partially disposed in the accommodating groove.

[0013] In the above technical solution, the provision of a receiving groove can, on the one hand, position the heat exchange body, reduce the risk of the heat exchange body shaking, improve the installation stability and reliability of the heat exchange body, and thus improve the reliability of the battery. On the other hand, it can increase the connection area between the heat exchange body and the bottom wall of the box, thereby improving the reliability of the heat exchange body fixed to the box. In addition, since the battery cell assembly can contact the bottom wall of the box and the heat exchange body, the heat exchange efficiency can be improved, which can further improve the reliability of the battery. In addition, the provision of a receiving groove on the bottom wall of the box gives the bottom wall of the box a concave-convex structure, thereby improving the structural strength of the box. The heat exchange body is at least partially disposed in the receiving groove, which is equivalent to a reinforcement structure of the box, which can further improve the structural strength of the box.

[0014] In some embodiments, the heat exchange channel includes a first heat exchange part, the first heat exchange part includes a plurality of first heat exchange segments arranged at intervals, the accommodating groove includes a plurality of first groove segments arranged at intervals, and the plurality of first heat exchange segments are arranged one-to-one in the plurality of first groove segments.

[0015] In the above technical solution, by setting the heat exchange channel to include multiple first heat exchange segments, the multiple first heat exchange segments can be distributed at different positions on the bottom wall of the box to meet the heat exchange requirements, and the accommodating groove is set to include multiple first groove segments. On the one hand, the multiple first heat exchange segments can be positioned to make the arrangement of the heat exchange channel more stable, and the heat exchange efficiency can be further improved, thereby improving the reliability of the battery. On the other hand, the bottom wall of the box can be formed with a relatively complex concave-convex structure, thereby improving the structural strength of the box and further improving the reliability of the battery.

[0016] In some embodiments, the battery cell assembly includes a plurality of battery cells, the battery cells include a plurality of battery cells and the plurality of battery cells of each battery cell are arranged along a first direction, the plurality of battery cells are arranged along a second direction, and the first direction and the second direction are arranged at an angle to each other; wherein, the plurality of first heat exchange sections are arranged at intervals along the first direction and each first heat exchange section extends along the second direction, and the plurality of first trough sections are arranged at intervals along the first direction and each first trough section extends along the second direction.

[0017] In the above technical solution, by defining the arrangement direction of the multiple first heat exchange segments and the extension direction of each first heat exchange segment, multiple battery cells in each battery unit can contact the multiple first heat exchange segments, and each first heat exchange segment can contact multiple battery cells, thereby ensuring more uniform heat exchange among the multiple battery cells and improving battery reliability. In addition, by defining the arrangement direction of the multiple first trough segments and the extension direction of each first trough segment, the multiple first trough segments can position the multiple first heat exchange segments, making the arrangement of the heat exchange flow channels more stable, further improving heat exchange efficiency, and enhancing the structural strength of the box, thereby improving battery reliability.

[0018] In some embodiments, the first heat exchange portion also includes a first bending section, which is arc-shaped and bent and connected between two adjacent first heat exchange sections; the accommodating groove also includes a connecting groove section, which is arc-shaped and bent and connected between two adjacent first groove sections, and the first bending section is arranged in the connecting groove section.

[0019] In the above technical solution, by providing the first bend section, the direction of fluid flow inside the first heat exchange part can be changed, a smooth transition between the two first heat exchange sections can be achieved, and a circuitous arrangement of the first heat exchange part can be realized. As a result, the contact area between a single battery cell and the first heat exchange part can be increased, thereby increasing the heat exchange area and improving the heat exchange efficiency of the first heat exchange part. At the same time, the first bend section is arc-shaped, which can also reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the fluid and further increasing the heat exchange efficiency of the first heat exchange part. In addition, the provision of the first bend section also makes the structure of the first heat exchange part more compact, the overall space occupied is smaller, and it is more conducive to the miniaturization design of the battery and improves the volume energy density of the battery. In addition, the accommodating groove is provided to include a connecting groove section, which can position the first bend section, making the arrangement of the heat exchange flow channel more stable, further improving the heat exchange efficiency, and thus improving the reliability of the battery.

[0020] In some embodiments, the heat exchange channel also includes a second heat exchange portion, which is bent to form a U-shaped area, one end of the first heat exchange portion is bent and connected to one end of the second heat exchange portion, and the first heat exchange portion is bent and arranged in the U-shaped area, and the first heat exchange portion and the second heat exchange portion are bent in the same plane; the accommodating groove also includes a second groove section, one end of the second groove section is bent and connected to one end of the first groove section, the shape of the second groove section is the same as the shape of the second heat exchange portion, and the second heat exchange portion is arranged in the second groove section.

[0021] In the above technical solution, the second heat exchange portion is bent to form a U-shaped area, and the first heat exchange portion is bent and arranged in the U-shaped area. When the first heat exchanger exchanges heat with the battery cell assembly, the U-shaped area formed by the outer second heat exchange portion can be opposite to the outer battery cells of the battery, and the first heat exchange portion in the U-shaped area can be opposite to the internal battery cells, so that the first heat exchanger can 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 cell assembly and the battery cells inside the battery cell assembly tend to be consistent, thereby improving the temperature uniformity of the battery, thereby improving the service life of the battery to a certain extent. In addition, by setting the accommodating groove to also include a second groove section, the second groove section can position the second heat exchange portion, making the arrangement of the heat exchange flow channel more stable, further improving the heat exchange efficiency, and thus improving the reliability of the battery.

[0022] In some embodiments, the number of heat exchange channels is one, which has a simple structure and is more convenient to control.

[0023] In some embodiments, there are multiple heat exchange channels, which are arranged in parallel and whose projections on the bottom wall of the housing do not overlap. In the above technical solution, by providing multiple heat exchange channels, on the one hand, the length of a single heat exchange channel can be reduced, and the arrangement of a single heat exchange channel can be simplified, thereby improving heat exchange efficiency and enhancing battery reliability. On the other hand, the arrangement, location, and distribution area of ​​the multiple heat exchange channels can be selected as needed to meet different heat exchange requirements.

[0024] In some embodiments, the heat exchange body includes a flat tube and the flat tube defines a heat exchange flow channel. The flat tube is arranged in the accommodating groove and the two walls of the flat tube arranged opposite to each other in the thickness direction are respectively fixedly connected to the bottom wall of the battery core assembly and the box assembly.

[0025] In the above technical solution, the heat exchange body is configured to include flat tubes. On the basis of reducing material costs, on the one hand, the contact area between the heat exchange body and the battery cell assembly can be increased, the heat exchange efficiency can be improved, and thus the reliability of the battery can be improved. On the other hand, the flat tubes occupy a small space, which is conducive to increasing the capacity of the battery and reducing the weight, volume and cost of the battery.

[0026] In some embodiments, the heat exchange body includes a heat exchange plate and the heat exchange plate includes: a first plate portion; a second plate portion, the second plate portion is covered on one side of the first plate portion in the thickness direction, and a heat exchange flow channel is defined between the second plate portion and the first plate portion; wherein the first plate portion is fixedly connected to the battery cell assembly, the second plate portion is fixedly connected to the bottom wall of the box assembly, the second plate portion has a protrusion and the protrusion is arranged in the accommodating groove.

[0027] In the above technical solution, the above-mentioned heat exchange flow channel can be defined by at least two plate portions. On the basis of meeting the heat exchange needs, the connection reliability between the heat exchange body and the bottom wall of the box, and between the heat exchange body and the battery core assembly can be improved; a convex portion is formed on the second plate portion, and the convex portion is matched with the accommodating groove. On the one hand, the accommodating groove can be used to position the second plate portion, thereby improving the installation stability and reliability of the heat exchange body, thereby improving the reliability of the battery. On the other hand, the connection area between the heat exchange body and the bottom wall of the box can be increased, thereby improving the reliability of the heat exchange body fixed on the box.

[0028] In some embodiments, the collector includes: a tube body; a first flow channel interface, the first flow channel interface is connected to the first inlet and outlet of the heat exchange flow channel; a second flow channel interface, the second flow channel interface is connected to the second inlet and outlet of the heat exchange flow channel; a separation structure, the separation structure is arranged inside the tube body, and the separation structure separates the first flow channel interface and the second flow channel interface inside the tube body.

[0029] In the above technical solution, by setting a tube body, the first inlet and outlet and the second inlet and outlet of the heat exchange channel are integrated into one, and by setting a partition structure inside the tube body, the first channel interface is separated from the second channel interface, so that the interior of the tube body can be divided into zones, so that the liquid inlet and discharge processes do not affect each other.

[0030] In some embodiments, the number of heat exchange channels, first channel interfaces, and second channel interfaces are respectively multiple; wherein, the multiple first channel interfaces correspond one-to-one to and are connected with the first inlets and outlets of the multiple heat exchange channels, and the multiple second channel interfaces correspond one-to-one to and are connected with the second inlets and outlets of the multiple heat exchange channels.

[0031] In the above technical solution, by setting multiple first flow channel interfaces and multiple second flow channel interfaces, the multiple first inlets and outlets of multiple heat exchange flow channels can be brought together by using a collector, and the multiple second inlets and outlets of multiple heat exchange flow channels can be brought together. On the one hand, the temperature of the heat exchange fluid in the multiple heat exchange flow channels can be made more balanced, thereby improving the heat exchange efficiency of the first heat exchange element, which is beneficial to improving the reliability of the battery. On the other hand, it can facilitate the installation of the first heat exchange element.

[0032] In some embodiments, the plurality of first flow channel interfaces are connected inside the pipe body; and / or the plurality of second flow channel interfaces are connected inside the pipe body.

[0033] In the above technical solution, a collector can be used to bring together multiple first inlets and outlets of multiple heat exchange channels, and to bring together multiple second inlets and outlets of multiple heat exchange channels, so that the temperature of the heat exchange fluid in the multiple heat exchange channels is more balanced.

[0034] In some embodiments, the number of heat exchange channels is multiple, and the collectors include two, one of which has multiple liquid inlet interfaces and the multiple liquid inlet interfaces correspond one-to-one to and are connected with the first inlets and outlets of the multiple heat exchange channels, and the other collector has multiple liquid discharge interfaces and the multiple liquid discharge interfaces correspond one-to-one to and are connected with the second inlets and outlets of the multiple heat exchange channels.

[0035] In the above technical solution, by providing two current collectors, one of which is used for liquid inlet and the other for liquid discharge, the structure of the current collectors can be simplified and the inflow and outflow of the heat exchange fluid can be easily controlled.

[0036] In some embodiments, the battery cell assembly includes a plurality of battery cells, the battery cells include a plurality of battery cells and the plurality of battery cells of each battery cell are arranged along a first direction, the plurality of battery cells are arranged along a second direction, and the first direction and the second direction are arranged at an angle to each other; wherein, the plurality of first heat exchange sections are arranged at intervals along the second direction and each first heat exchange section extends along the first direction, and the plurality of first trough sections are arranged at intervals along the second direction and each first trough section extends along the first direction.

[0037] In the above technical solution, by defining the arrangement direction of the multiple first heat exchange segments and the extension direction of each first heat exchange segment, multiple battery cells in each battery unit can contact the same first heat exchange segment, and multiple battery cells can contact multiple first heat exchange segments, thereby ensuring more uniform heat exchange among the multiple battery cells and improving battery reliability. In addition, by defining the arrangement direction of the multiple first trough segments and the extension direction of each first trough segment, the multiple first trough segments can position the multiple first heat exchange segments, making the arrangement of the heat exchange flow channels more stable, further improving heat exchange efficiency, and thus improving battery reliability.

[0038] In some embodiments, the heat exchange body includes a plurality of heat exchange tubes arranged at intervals along the second direction, and each heat exchange tube defines a first heat exchange section. By configuring the heat exchange body to include a plurality of heat exchange tubes, the material used in the heat exchange body can be reduced, thereby reducing costs.

[0039] In some embodiments, each heat exchange tube includes: a first tube segment, the first tube segment extending along a first direction and defining a first heat exchange section; and two second tube segments, both of which extend along a third direction, with one end of the two first tube segments respectively connected to the two ends of the first tube segment and the other ends of the two first tube segments connected to the current collector. In the above technical solution, by configuring the heat exchange tube with the above structure, the structure of the heat exchange tube can correspond to the bottom wall and surrounding wall of the box, and the structure of the heat exchange tube can correspond to the bottom and side of the battery cell assembly, thereby increasing the contact area between the heat exchange tube and the battery cell assembly, improving the heat exchange efficiency of the first heat exchange element, and thereby improving the reliability of the battery.

[0040] In some embodiments, the heat exchange tube is a flat tube. In the above technical solution, the heat exchange body is configured to include a flat tube. Since the flat tube occupies a small space, it is beneficial to increase the capacity of the battery and reduce the weight, volume and cost of the battery.

[0041] In some embodiments, a reinforcement member is provided inside the heat exchange tube. In the above technical solution, by providing the reinforcement member inside the heat exchange tube, the heat exchange tube's anti-deformation ability can be improved, so that the heat exchange tube and the battery cell assembly can be fully contacted, thereby improving the heat exchange efficiency and further enhancing the reliability of the battery.

[0042] In some embodiments, the reinforcement member includes a plurality of reinforcing ribs spaced apart in the second direction, with each rib supporting the heat exchange tube between two walls disposed opposite each other in the thickness direction of the heat exchange tube. In the above technical solution, by configuring the reinforcement member to include multiple reinforcing ribs, the heat exchange element's resistance to deformation in a third direction perpendicular to the second direction can be improved. This can, on the one hand, enhance the structural strength of the heat exchange tube, improve the reliability of the heat exchange element, and thus improve the reliability of the battery. On the other hand, it can ensure sufficient contact between the heat exchange tube and the battery cell assembly, improving heat exchange efficiency and further enhancing battery reliability.

[0043] In some embodiments, the heat exchange body further includes a fixing member disposed between two adjacent heat exchange tubes, and the heat exchange body is connected to the housing via the fixing member. In the above technical solution, the fixing member secures the heat exchange body within the housing, thereby improving the installation stability and reliability of the heat exchange body, and thereby improving the reliability of the battery.

[0044] In some embodiments, a first fixing beam and a second fixing beam are provided within the housing, the first fixing beam and the second fixing beam being spaced apart in a first direction and both extending in a second direction in length, with the battery cell assembly located between the first fixing beam and the second fixing beam; wherein the fixing member is connected to the housing via the first fixing beam or the second fixing beam. In the above technical solution, by providing the first fixing beam and the second fixing beam, on the one hand, the structural strength of the housing can be improved, thereby improving the reliability of the battery; on the other hand, the fixing member of the heat exchange body can be fixed to the first fixing beam or the second fixing beam, thereby fixing the heat exchange body within the housing. Without damaging the structure of the housing, the installation stability and reliability of the first heat exchange member within the housing can be improved, thereby further improving the reliability of the battery.

[0045] In some embodiments, the current collector includes: a first current collector and a second current collector, the first current collector and the second current collector being spaced apart in a first direction and extending in a second direction in length, and each heat exchange tube being connected to the first current collector and the second current collector at both ends. In the above technical solution, by configuring the current collector to include the first current collector and the second current collector, the ends of the multiple heat exchange tubes are connected to the first current collector and the second current collector, thereby enabling the multiple heat exchange tubes to be arranged in parallel, so that the temperatures of the multiple heat exchange tubes are relatively uniform, which is beneficial to improving the heat exchange effect and thus improving the reliability of the battery. In addition, the first current collector and the second current collector can be arranged close to the top, so that they can be arranged opposite to the surrounding wall of the box, thereby eliminating the need for openings at the bottom of the expansion beam, and eliminating the need for a sealing structure between the current collector and the expansion beam and the bottom wall of the box.

[0046] In some embodiments, a battery cell assembly includes a plurality of battery units, each of which includes a plurality of battery cells, and the plurality of battery cells in each battery unit are arranged along a first direction, and the plurality of battery cells are arranged along a second direction, with the first direction and the second direction being arranged at an angle to each other; an expansion beam is provided within the housing, the expansion beam including a first expansion beam and a second expansion beam, the first expansion beam and the second expansion beam being arranged at intervals in the second direction and both extending in the first direction in their length direction, each of the first expansion beam and the second expansion beam having a cavity therein, and the battery cell assembly being located between the first expansion beam and the second expansion beam. In the above technical solution, by providing the first expansion beam and the second expansion beam, when the battery cells of the battery cell assembly have a tendency to expand, the first expansion beam and the second expansion beam abut against the battery cell assembly, utilizing the deformation of the cavities of the first expansion beam and the second expansion beam to absorb and transmit the expansion force, thereby reducing the probability of deformation of the battery cells due to the expansion force.

[0047] In some embodiments, a first fixed beam and a second fixed beam are provided in the box body, the first fixed beam and the second fixed beam are spaced apart in the first direction and their length directions both extend in the second direction, and the battery cell assembly is located between the first fixed beam and the second fixed beam; wherein, the two ends of each of the first expansion beam and the second expansion beam are respectively connected to the first fixed beam and the second fixed beam by a first fastener. In the above technical solution, by providing the first fixed beam and the second fixed beam, on the one hand, the structural strength of the box body can be improved, thereby improving the reliability of the battery; on the other hand, each of the first expansion beam and the second expansion beam can be fixed between the first fixed beam and the second fixed beam, thereby fixing the first expansion beam and the second expansion beam in the box body. Without destroying the structure of the box body, the installation stability and reliability of the first expansion beam and the second expansion beam in the box body can be improved, thereby further improving the reliability of the battery.

[0048] In some embodiments, at least one of the first expansion beam and the second expansion beam has a clearance hole for clearing the current collector and / or the heat exchange body. In the above technical solution, by providing the clearance hole on the first expansion beam and / or the second expansion beam, without affecting the first expansion beam and / or the second expansion beam's ability to absorb and transmit expansion force, the first expansion beam and / or the second expansion beam can be reduced from interfering with the installation of the first heat exchange element, and the connection between the current collector of the first heat exchange element and the water nozzle on the housing can be facilitated.

[0049] In some embodiments, at least one of the first expansion beam and the second expansion beam includes: a support beam extending along a first direction and fixedly connected to the bottom wall of the box, the support beam defining an avoidance hole; and an expansion beam body extending along the first direction and connected to the support beam, the expansion beam body defining a cavity. In the above technical solution, by configuring the first expansion beam and / or the second expansion beam to include a support beam and an expansion beam body, the support beam can provide an installation position for the expansion beam without destroying the structure of the box, thereby improving the bottom sealing of the box. When the battery cell of the battery cell assembly has an expansion tendency, the expansion beam body abuts against the battery cell assembly, and utilizes the deformation of the cavity of the expansion beam body to absorb and transmit the expansion force, thereby reducing the probability of the battery cell being deformed due to the expansion force.

[0050] In some embodiments, the support beam includes a plurality of support portions spaced apart along a first direction, with avoidance holes defined between adjacent support portions. In the above technical solution, the support beam is configured in the above structure, and the avoidance holes are defined by the adjacent support portions. This eliminates the need for drilling holes in the support beam, simplifying the processing steps and facilitating improved production efficiency and reduced costs. Furthermore, during assembly, the first heat exchange element can be placed in the housing from top to bottom before the expansion beam body is installed, reducing the difficulty of installing the first heat exchange element and further improving production efficiency and reducing costs.

[0051] In some embodiments, the expansion beam body includes: a main portion, at least a portion of which is disposed on a side of the plurality of support portions facing the cell assembly; and a connecting portion, which is connected to a side of the main portion facing away from the cell assembly and connected to a side of the plurality of support portions facing away from the bottom wall of the housing. The main portion and the connecting portion each cover at least a portion of the avoidance hole. In the above technical solution, by configuring the expansion beam body to include the main portion and the connecting portion, when a battery cell in the cell assembly has a tendency to expand, the main portion abuts the cell assembly, utilizing the deformation of the cavity of the main portion to absorb and transmit the expansion force, thereby reducing the probability of deformation of the battery cell due to the expansion force. The connecting portion connects the main portion to the support beam, thereby enabling installation of the expansion beam body. Furthermore, by having the main portion and the connecting portion cover at least a portion of the avoidance hole, the effect of the avoidance hole on the structural strength of the first or second expansion beam can be reduced, while the contact area between the first or second expansion beam and the cell assembly can be increased, thereby improving the absorption and transmission of the expansion force by the first or second expansion beam, thereby enhancing the reliability of the battery.

[0052] In some embodiments, the support beam is welded to the bottom wall of the box, and the expansion beam body is connected to the side of the support beam facing away from the bottom wall of the box via a second fastener. In the above technical solution, by connecting the expansion beam body and the support beam via the second fastener, the assembly and disassembly of the expansion beam body and the support beam are simplified, which is beneficial to improving battery production efficiency and facilitating maintenance and component replacement.

[0053] In some embodiments, the expansion beam body is formed using an extrusion process to define the cavity. Extrusion allows for complex cross-sections to be formed as required, reducing the number of components in the expansion beam body and eliminating the need for assembly steps. This makes installation of the expansion beam body more convenient, thereby improving production efficiency.

[0054] In some embodiments, at least one of the first expansion beam and the second expansion beam comprises: a plurality of plates stacked and connected along the second direction, the plates extending along the first direction, a cavity defined between at least two of the plates, and the avoidance hole extending through the plurality of plates. In the above technical solution, by utilizing multiple, individually formed plates to form the first expansion beam or the second expansion beam, the difficulty of manufacturing each component can be reduced, thereby lowering production costs and improving production efficiency.

[0055] In some embodiments, the plates are formed using a stamping process. Using this process to form multiple plates allows for different structures to be formed as needed. This simplifies the forming process, reduces processing difficulty, and helps lower production costs. Assembling multiple plates defines a cavity, which can then be used to absorb and transmit expansion forces through deformation, reducing the probability of deformation of the battery cells due to expansion forces.

[0056] In some embodiments, the current collector is connected to one side of the heat exchange body along the second direction, and the avoidance hole is provided on the side of the first expansion beam or the second expansion beam facing the bottom wall of the housing. In the above technical solution, the avoidance hole is provided on the side of the first expansion beam or the second expansion beam facing the bottom wall of the housing, so that the current collector or the heat exchange body does not need to be bent upward or bent upward excessively, which can simplify the structure of the current collector or the heat exchange body. In addition, this arrangement allows the first expansion beam or the second expansion beam to stop above the current collector or the heat exchange body, thereby further limiting the position of the first heat exchange element and improving the installation reliability of the first heat exchange element.

[0057] In some embodiments, the current collector includes: a first current collector and a second current collector, the first current collector and the second current collector being spaced apart in a first direction and both extending longitudinally in a second direction, and a relief hole being provided on a side of the first expansion beam or the second expansion beam facing away from the bottom wall of the housing. In the above technical solution, by providing the relief hole on the side of the first expansion beam or the second expansion beam facing away from the bottom wall of the housing, the first and second current collectors can be positioned upward, thereby being positioned opposite the surrounding wall of the housing, eliminating the need for a sealing structure between the current collectors and the expansion beams or the bottom wall of the housing.

[0058] In some embodiments, a support member is connected to the side of at least one of the first and second expansion beams facing away from the battery cell assembly, and the support member is connected to the bottom wall or the surrounding wall of the box. In the above technical solution, the support member can support the first or second expansion beam, effectively improving the overall structural strength and rigidity of the first or second expansion beam, reducing the probability of the first or second expansion beam tilting, and thus improving the reliability of the battery.

[0059] In some embodiments, the first expansion beam is provided with a first mounting member, the second expansion beam is provided with a second mounting member, and the battery further includes a drawstring, the ends of which are connected to the first mounting member and the second mounting member, respectively. In the above technical solution, by configuring each of the first mounting member and the second mounting member into the above-described structure, installation and removal of the drawstring are facilitated.

[0060] In some embodiments, there are multiple first mounting members, multiple second mounting members, and multiple pull cords, each of which is arranged along a first direction. The ends of the multiple pull cords are connected to the multiple first mounting members and the multiple second mounting members in a one-to-one correspondence. In the above technical solution, the use of multiple pull cords to connect the first expansion beam and the second expansion beam can better resist the pressure applied by the battery cell assembly to the first expansion beam and the second expansion beam, further reducing the probability of the first expansion beam and the second expansion beam tilting relative to the vertical direction and the first direction, thereby improving battery reliability.

[0061] In some embodiments, the battery cell assembly includes multiple battery cells, each of which includes multiple battery cells, with the multiple battery cells in each battery cell arranged along a first direction and the multiple battery cells arranged along a second direction, with the first and second directions arranged at an angle to each other. The first heat exchange assembly also includes a second heat exchange element, which is positioned between two adjacent battery cells. In the above technical solution, the provision of the second heat exchange element increases the contact area between the battery cells and the heat exchange assembly, thereby increasing the contact area between the battery cell assembly and the first heat exchange assembly, significantly improving heat exchange efficiency and enhancing battery reliability.

[0062] In some embodiments, the housing assembly further includes a housing cover, which is attached to the top of the housing and has a top wall. The first heat exchange assembly further includes a third heat exchange element, which is at least partially located between the top wall of the housing cover and the battery cell assembly. In this technical solution, the provision of the third heat exchange element increases the contact area between the battery cell assembly and the first heat exchange assembly, thereby significantly improving heat exchange efficiency and enhancing battery reliability.

[0063] In some embodiments, the battery further comprises: a second heat exchange assembly, which is fitted outside the casing. In the above technical solution, by placing the second heat exchange assembly outside the casing, there is no need to consider issues such as insulation and corrosion protection between the heat exchange component and the battery cells inside the casing, thereby simplifying the insulation and corrosion protection design of the second heat exchange assembly, reducing processing difficulty and production costs, solving the short circuit problem between the battery cells and the second heat exchange assembly, and improving battery reliability. Moreover, by placing the second heat exchange assembly outside the casing assembly, the second heat exchange assembly does not occupy space inside the casing, so that the battery capacity will not be reduced due to the installation of the heat exchange component, thereby better ensuring the battery capacity.

[0064] In a second aspect, the present application provides an electrical device comprising the battery in the above embodiment.

[0065] In the technical solution of the embodiment of the present application, by adopting the above-mentioned battery, the reliability of the electrical device can be improved, and the production efficiency of the electrical device can be improved and the cost can be reduced.

[0066] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0068] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0069] FIG2 is an exploded view of the structure of a battery provided in some embodiments of the present application;

[0070] FIG3 is a schematic diagram of a battery assembly according to some embodiments of the present application from a certain perspective;

[0071] FIG4 is a schematic diagram of a battery assembly according to some embodiments of the present application from another perspective;

[0072] FIG5 is an enlarged view of the V portion shown in FIG4 ;

[0073] FIG6 is a top view of the battery shown in FIG4;

[0074] FIG7 is a schematic structural diagram of a first heat exchange element of a battery according to another embodiment of the present application;

[0075] FIG8 is a schematic structural diagram of a first heat exchange element of a battery according to another embodiment of the present application;

[0076] FIG9 is a diagram of the assembly of batteries according to some other embodiments of the present application;

[0077] FIG10 is a cross-sectional view of the structure along line AA in FIG9 ;

[0078] FIG11 is a cross-sectional view of the structure along line BB in FIG9 ;

[0079] FIG12 is a partial enlarged view of the structure shown in FIG11;

[0080] FIG13 is a diagram of the assembly of batteries according to other embodiments of the present application;

[0081] FIG14 is a schematic structural diagram of the first heat exchange element of the battery shown in FIG13;

[0082] FIG15 is a top view of the battery shown in FIG13;

[0083] FIG16 is a cross-sectional view of the structure along line CC in FIG15;

[0084] FIG17 is a partial enlarged view of the structure shown in FIG16;

[0085] FIG18 is a cross-sectional view of the structure along line DD in FIG15;

[0086] FIG19 is a partial enlarged view of the structure shown in FIG18;

[0087] FIG20 is a schematic structural diagram of the battery box, etc. shown in FIG13;

[0088] FIG21 is a schematic structural diagram of current collectors of batteries according to some other embodiments of the present application;

[0089] FIG22 is a cross-sectional view of the structure of the current collector shown in FIG21;

[0090] FIG23 is a partial assembly diagram of batteries according to some other embodiments of the present application from a certain perspective;

[0091] FIG24 is a schematic diagram of the battery assembly of some other embodiments of the present application from another perspective;

[0092] FIG25 is an exploded view of the battery structure shown in FIG24 ;

[0093] FIG26 is an enlarged view of portion E shown in FIG25 ;

[0094] FIG27 is a top view of the battery shown in FIG24;

[0095] FIG28 is a cross-sectional view of the structure along line FF in FIG24;

[0096] FIG29 is a partial enlarged view of the structure shown in FIG28;

[0097] FIG30 is a cross-sectional view of the structure along line GG in FIG24;

[0098] FIG31 is a diagram of the assembly of batteries according to some other embodiments of the present application;

[0099] FIG32 is a schematic structural diagram of the battery cell and the second heat exchange element shown in FIG31;

[0100] FIG33 is a diagram of the assembly of batteries according to some further embodiments of the present application.

[0101] The accompanying drawings in the specific implementation manner are as follows:

[0102] Electric device 1000, battery 100, battery cell assembly 101, battery unit 102, controller 200, motor 300,

[0103] Battery cell 10,

[0104] Box assembly 20, box body 21, bottom wall 211, surrounding wall 212, accommodating groove 213, first groove section 2131, connecting groove section 2132, second groove section 2133, installation groove 214, box cover 22,

[0105] First heat exchange assembly 30, first heat exchange element 31, heat exchange channel 310, first heat exchange portion 3101, first heat exchange section 3102, first bending section 3103, second heat exchange portion 3104, U-shaped area 3104a, second heat exchange section 3105, second bending section 3106, third heat exchange section 3107, third heat exchange portion 3109, first inlet and outlet 3109a, second inlet and outlet 3109b, heat exchange body 312, heat exchange plate 313, first plate portion 3131, second plate portion 3132, protrusion 3133, heat exchange tube 314, first tube section 314 1, second pipe section 3142, reinforcement 3143, reinforcement rib 3144, fixing member 3145, current collector 315, pipe body 3151, first space 3151a, second space 3151b, first flow channel interface 3152, second flow channel interface 3153, partition structure 3154, first partition plate 3154a, second partition plate 3154b, liquid inlet interface 3155, liquid discharge interface 3156, first header 3157, second header 3158, hose 316, second heat exchange element 32, third heat exchange element 33, second heat exchange assembly 40,

[0106] First fixed beam 51, second fixed beam 52, connecting beam 53, expansion beam 60, first expansion beam 61, second expansion beam 62, cavity 6301, avoidance hole 6302, support beam 64, support portion 641, expansion beam body 65, main body 651, connecting portion 652, plate body 66, outer support plate 661, inner support plate 662, reinforcement plate 663, first fastener 67, second fastener 68, third fastener 69,

[0107] Support member 71 , first mounting member 72 , second mounting member 73 , mounting portion 741 , fixing portion 742 , pull rope 75 , first mounting beam 81 , second mounting beam 82 , bottom guard plate 90 . DETAILED DESCRIPTION

[0108] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0109] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0110] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0111] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present 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. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0112] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0113] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0114] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0115] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0116] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing.

[0117] The battery in the related art includes a square profile frame, a water-cooling plate, and a bottom guard plate located below the water-cooling plate. Foam is placed between the bottom guard plate and the water-cooling plate, and the bottom guard plate and the square profile frame are connected by a large number of bolts. However, the connection between the bottom guard plate and the square profile frame is difficult to achieve a sealed connection, resulting in muddy water seeping into the box through the connection, affecting the battery cell assembly and thus the reliability of the battery. Furthermore, the box has many structural components, resulting in complex assembly steps, low production efficiency, and high costs.

[0118] To this end, the present invention proposes a battery that replaces the existing profiled housing with a one-piece stamped housing. This eliminates the need to consider the sealing of the housing's bottom and surrounding walls, preventing muddy water from seeping into the housing through the junction between the bottom and surrounding walls and potentially affecting the battery cells within, thereby improving battery reliability. Furthermore, the one-piece stamped housing requires no splicing, eliminating the numerous bolts typically found in existing profiled housings. This reduces costs, eliminates connection steps, and improves production efficiency.

[0119] The battery disclosed in the embodiments of the present application can be used in electrical devices that use the battery as a power source or various energy storage systems that use the battery as an energy storage element. The electrical device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and the spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0120] For the convenience of description, the following embodiments are described by taking an electric device 1000 according to an embodiment of the present application as a vehicle as an example.

[0121] Please refer to Figure 1, which is a schematic diagram of the structure of the vehicle provided in some embodiments of the present application. The vehicle 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 100 is provided inside the vehicle, and the battery 100 can be provided at the bottom, head or tail of the vehicle. The battery 100 can be used to power the vehicle. For example, the battery 100 can be used as an operating power source for the vehicle. The vehicle can also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and operating power requirements of the vehicle during driving.

[0122] In some embodiments of the present application, the battery 100 can serve not only as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0123] Please refer to FIG2 , which is an exploded view of a battery 100 provided in some embodiments of the present application. The battery 100 includes a box assembly 20 and a cell assembly 101 , wherein the cell assembly 101 is accommodated in the box assembly 20 .

[0124] The box assembly 20 is used to provide a storage space for the battery cells 10. The box assembly 20 can adopt a variety of structures. In some embodiments, the box assembly 20 can include a box body 21 and a box cover 22. The box body 21 and the box cover 22 cover each other, and the box body 21 and the box cover 22 together define a storage space for accommodating the battery cells 10. The box body 21 can be a hollow structure with one end open, and the box cover 22 can be a plate-like structure. The box cover 22 covers the open side of the box body 21, so that the box body 21 and the box cover 22 together define a storage space. The box body 21 and the box cover 22 can also be hollow structures with one side open, and the open side of the box cover 22 covers the open side of the box body 21. Of course, the box assembly 20 formed by the box body 21 and the box cover 22 can have a variety of shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0125] The battery cell assembly 101 may include multiple battery cells 10, which may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 10. Multiple battery cells 10 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery 10 system may be housed within the housing assembly 20. Alternatively, the battery 100 may be constructed by first connecting multiple battery cells 10 in series, in parallel, or in a hybrid connection to form a battery 100 module. Multiple battery modules 100 may then be connected in series, in parallel, or in a hybrid connection to form an entire battery 100 system, and then housed within the housing assembly 20. The battery 100 may also include other structures. For example, the battery 100 may include a busbar assembly for electrically connecting the multiple battery cells 10.

[0126] Each battery cell 10 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 10 can be cylindrical, flat, rectangular, or in other shapes.

[0127] The battery cell 10 includes a housing cover, a housing body, an electrode assembly, and other functional components.

[0128] The shell cover refers to the component that fits over the opening of the shell body to isolate the internal environment of the battery cell 10 from the external environment. The shape of the shell cover can be adapted to the shape of the shell body to match the shell body. Optionally, the shell cover can be made of a material with a certain hardness and strength (such as aluminum alloy). This makes the shell cover less likely to deform when subjected to compression or collision, giving the battery cell 10 greater structural strength and improved reliability. The shell cover can be provided with functional components such as electrode terminals. The electrode terminals can be used to electrically connect to the electrode assembly to output or input electrical energy to the battery cell 10. In some embodiments, the shell cover can also be provided with a pressure relief mechanism for relieving internal pressure when the internal pressure or temperature of the battery cell 10 reaches a threshold. The shell cover can also be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this is not particularly limited in the present embodiment. In some embodiments, an insulating member can also be provided on the inside of the shell cover to isolate the electrical connection 652 within the shell body from the shell cover to reduce the risk of short circuits. For example, the insulating member may be made of plastic, rubber, or the like.

[0129] The shell body is a component used to cooperate with the shell cover to form the internal environment of the battery cell 10, wherein the formed internal environment can be used to accommodate the electrode assembly, electrolyte and other components. The shell body and the shell cover can be independent components, and an opening can be set on the shell body. The internal environment of the battery cell 10 is formed by covering the opening with the shell cover at the opening. Without limitation, the shell cover and the shell body can also be integrated. Specifically, the shell cover and the shell body can form a common connection surface before other components are inserted into the shell. When the interior of the shell body needs to be encapsulated, the shell cover is closed with the shell body. The shell body can be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the shell body can be determined according to the specific shape and size of the electrode assembly. The material of the shell body can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this.

[0130] The electrode assembly is the component in the battery cell 10 where the electrochemical reaction occurs. One or more electrode assemblies may be contained within the battery body. The electrode assembly is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active materials constitute the main body 651 of the electrode assembly, and the portions of the positive and negative electrode sheets without active materials each constitute a tab. During the charge and discharge process of the battery 100, the positive and negative electrode active materials react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0131] According to some embodiments of the present application, referring to FIG. 2 and further referring to FIG. 3 and FIG. 4 , FIG. 3 is a partial assembly diagram of a battery 100 according to some embodiments of the present application from one perspective, and FIG. 4 is a partial assembly diagram of a battery 100 according to some embodiments of the present application from another perspective, the box assembly 20 includes a box body 21 , which is a one-piece stamped part having a bottom wall 211 and a surrounding wall 212 , i.e., there is no connection seam between the bottom wall 211 and the surrounding wall 212 of the box body 21 .

[0132] The battery 100 also includes a cell assembly 101 and a first heat exchange assembly 30. Both the cell assembly 101 and the first heat exchange assembly 30 are disposed within the housing assembly 20. The cell assembly 101 is fixedly connected to the bottom wall 211 of the housing 21, and the first heat exchange assembly 30 exchanges heat with the cell assembly 101. Placing the first heat exchange assembly 30 within the housing assembly 20 allows for direct contact between the first heat exchange assembly 30 and the cell assembly 101, improving the heat exchange efficiency of the first heat exchange assembly 30 and thereby enhancing the reliability of the battery 100.

[0133] In the technical solution of the embodiment of the present application, since the bottom wall 211 and the surrounding wall 212 of the housing 21 are integrally stamped and formed, there is no need to consider sealing issues at the junction between the bottom wall 211 and the surrounding wall 212, thereby improving the sealing effect. This prevents muddy water from seeping into the housing 21 through the junction between the bottom wall 211 and the surrounding wall 212 and affecting the battery cell assembly 101 therein, thereby improving the reliability of the battery 100. Furthermore, the integrally stamped housing 21 does not require splicing. This not only eliminates the need for numerous bolts on the original profile housing 21, reducing costs, but also eliminates the need for connection steps, thereby improving production efficiency.

[0134] In addition, the integrally stamped box body 21 can prevent the substances ejected when the battery 100 has thermal runaway and the heat exchange fluid leaked from the first heat exchange component 30 from flowing outside the box body 21, thereby reducing direct contact between the human body and the leaked substances, protecting personal safety, and reducing environmental pollution.

[0135] Please refer to Figure 3 again. The first heat exchange component 30 includes a first heat exchange member 31. The first heat exchange member 31 includes a heat exchange body 312 and a current collector 315. The heat exchange body 312 is at least partially arranged between the bottom wall 211 of the box body 21 and the battery cell assembly 101. The heat exchange body 312 has a heat exchange flow channel 310. The current collector 315 is connected to the heat exchange flow channel 310, and the current collector 315 can play a confluence role.

[0136] Specifically, in an embodiment where the number of the heat exchange channel 310 is one, the current collector 315 may integrate the inlet end and the outlet end of the heat exchange channel 310 into one.

[0137] In an embodiment where there are multiple heat exchange channels 310, the fluid collector 315 can integrate the inlet ends of multiple heat exchange channels 310 and the outlet ends of multiple heat exchange channels 310 into one; one fluid collector 315 can be used to integrate the inlet ends of multiple heat exchange channels 310 into one, and another fluid collector 315 can be used to integrate the outlet ends of multiple heat exchange channels 310 into one; one fluid collector 315 can be used to integrate the inlet end and outlet end of one heat exchange channel 310 into one, and another fluid collector 315 can be used to integrate the inlet end and outlet end of another heat exchange channel 310 into one.

[0138] In the above technical solution, the heat exchange body 312 of the first heat exchange component 31 is at least partially arranged between the bottom wall 211 of the box body 21 and the battery cell assembly 101, so that the heat exchange body 312 of the first heat exchange component 31 is in direct contact with the bottom of the battery cell assembly 101. The heat exchange body 312 can exchange heat with each battery cell 10 of the battery cell assembly 101, which is beneficial to improving the heat exchange efficiency.

[0139] 3 and 4 again, and further referring to FIG5 , FIG5 is an enlarged view of the V portion shown in FIG4 . The inner surface of the bottom wall 211 of the box body 21 has an accommodating groove 213 , and the heat exchange body 312 is at least partially disposed in the accommodating groove 213 .

[0140] The accommodating groove 213 may be integrally formed during the stamping process of the box body 21 , or the accommodating groove 213 may be separately processed after the box body 21 is stamped.

[0141] The "accommodating groove 213" has a notch, and the accommodating groove 213 is connected to the internal space of the box body 21 through the notch. The heat exchange body 312 can be lower than the plane where the notch of the accommodating groove 213 is located, so that the heat exchange body 312 can be more stably installed in the accommodating groove 213; of course, the heat exchange body 312 can protrude from the plane where the notch of the accommodating groove 213 is located, so that the heat exchange body 312 and the battery cell assembly 101 can be fully in contact, thereby improving the heat exchange efficiency.

[0142] In the above technical solution, an accommodating groove 213 is provided, which can, on the one hand, position the heat exchange body 312, reduce the risk of shaking of the heat exchange body 312, and improve the installation stability and reliability of the heat exchange body 312, thereby improving the reliability of the battery 100; on the other hand, it can increase the connection area between the heat exchange body 312 and the bottom wall 211 of the box body 21, thereby improving the reliability of the heat exchange body 312 fixed on the box body 21.

[0143] In addition, a receiving groove 213 is provided on the bottom wall 211 of the box body 21, so that the bottom wall 211 of the box body 21 has a concave-convex structure, thereby improving the structural strength of the box body 21, and the heat exchange body 312 is at least partially provided in the receiving groove 213, which is equivalent to the reinforcement structure of the box body 21, and can further improve the structural strength of the box body 21.

[0144] Please refer to Figures 6-8. Figure 6 is a top view of the battery 100 shown in Figure 4; Figure 7 is a schematic diagram of the structure of the first heat exchange member 31 of the battery 100 according to another embodiment of the present application; and Figure 8 is a schematic diagram of the structure of the first heat exchange member 31 of the battery 100 according to yet another embodiment of the present application. The heat exchange channel 310 includes a first heat exchange portion 3101, which includes a plurality of first heat exchange segments 3102 arranged at intervals. The accommodating groove 213 includes a plurality of first groove segments 2131 arranged at intervals. The plurality of first heat exchange segments 3102 are disposed in a one-to-one correspondence within the plurality of first groove segments 2131.

[0145] Specifically, the arrangement direction of the multiple first heat exchange sections 3102 of the heat exchange channel 310 can be consistent with the arrangement direction of the multiple first slot sections 2131, and the extension direction of a single first heat exchange section 3102 can be consistent with the extension direction of a single first slot section 2131, so that the multiple first heat exchange sections 3102 can be arranged one by one in the multiple first slot sections 2131.

[0146] In the above technical solution, by setting the heat exchange channel 310 to include multiple first heat exchange sections 3102, the multiple first heat exchange sections 3102 can be distributed at different positions on the bottom wall 211 of the box body 21 to meet the heat exchange requirements, and the accommodating groove 213 is set to include multiple first groove sections 2131. On the one hand, the multiple first heat exchange sections 3102 can be positioned to make the arrangement of the heat exchange channel 310 more stable, and the heat exchange efficiency can be further improved, thereby improving the reliability of the battery 100. On the other hand, the bottom wall 211 of the box body 21 can be formed with a relatively complex concave-convex structure, thereby improving the structural strength of the box body 21 and further improving the reliability of the battery 100.

[0147] Referring to FIG. 7 again, the battery cell assembly 101 includes a plurality of battery cells 102 , each of which includes a plurality of battery cells 10 , and the plurality of battery cells 10 in each battery cell 102 are arranged along a first direction, and the plurality of battery cells 102 are arranged along a second direction, with the first direction and the second direction being arranged at an angle to each other.

[0148] As shown in Figure 7, for the battery cell assembly 101, the X direction in Figure 7 is the width direction of the battery cell assembly 101, and the Y direction is the length direction of the battery cell assembly 101. For the battery cell 10, the X direction in Figure 7 is the length direction of the battery cell 10, and the Y direction is the thickness direction of the battery cell 10. The battery cell assembly 101 includes a plurality of battery cells 102, and the plurality of battery cells 102 are arranged along the second direction, that is, the plurality of battery cells 102 are stacked in the thickness direction of the battery cell 10. Each battery cell 102 includes a plurality of battery cells 10, and the plurality of battery cells 10 of each battery cell 102 are arranged along the first direction, that is, the plurality of battery cells 10 of each battery cell 102 are stacked in the length direction of the battery cell 10.

[0149] As shown in Figures 6-8 , the multiple first heat exchange segments 3102 are spaced apart along the first direction, and each first heat exchange segment 3102 extends along the second direction. The multiple first trough segments 2131 are spaced apart along the first direction, and each first trough segment 2131 extends along the second direction. In other words, the arrangement direction of the first heat exchange segments 3102 forms an angle with the arrangement direction of the multiple battery cells 102, and the arrangement direction of the first heat exchange segments 3102 is consistent with the arrangement direction of the multiple battery cells 10 in each battery cell 102.

[0150] In the above technical solution, by limiting the arrangement direction of multiple first heat exchange sections 3102 and the extension direction of each first heat exchange section 3102, multiple battery cells 10 in each battery unit 102 can be in contact with multiple first heat exchange sections 3102, and each first heat exchange section 3102 can be in contact with multiple battery cells 102, so that the heat exchange of multiple battery cells 10 can be more uniform, which is beneficial to improving the reliability of the battery 100.

[0151] In addition, by limiting the arrangement direction of the multiple first slot sections 2131 and the extension direction of each first slot section 2131, the multiple first slot sections 2131 can position the multiple first heat exchange sections 3102, making the arrangement of the heat exchange channel 310 more stable, further improving the heat exchange efficiency, and thus improving the reliability of the battery 100.

[0152] Please refer to FIG. 6 to FIG. 8 again. The first heat exchange portion 3101 further includes a first bending section 3103 . The first bending section 3103 is arc-shaped and is bent and connected between two adjacent first heat exchange sections 3102 .

[0153] The first bending section 3103 is arc-shaped, that is, the first bending section 3103 extends along an arc, and the flow direction of the heat exchange fluid at both ends of the first bending section 3103 has a certain angle. As a result, the first bending section 3103 can change the flow direction of the heat exchange fluid, thereby allowing the two connected first heat exchange sections 3102 to be extended and arranged within a preset area, thereby increasing the heat exchange area of ​​the first heat exchange section 3101 and improving the heat exchange efficiency of the first heat exchange section 3101. At the same time, the first bending section 3103 is arc-shaped, and the arc-shaped bending structure can reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the fluid and further improving the heat exchange efficiency of the first heat exchange section 3101.

[0154] Furthermore, the number of the first bending sections 3103 can be one, two, three or more. The first bending sections 3103 can make the first heat exchange part 3101 arranged in a circuitous manner, thereby increasing the heat exchange area of ​​the first heat exchange part 3101 and improving the heat exchange efficiency of the first heat exchange part 3101.

[0155] In the embodiment where there are two first heat exchange sections 3102, there is only one first bending section 3103. The first bending section 3103 is bent and connected to the same end of the two first heat exchange sections 3102, so that the first heat exchange portion 3101 can form a U-shaped structure.

[0156] In an embodiment in which the number of first heat exchange ends is more than two, the number of first bending sections 3103 is more than one, and multiple first bending sections 3103 are bent and connected between the same ends of two adjacent first heat exchange sections 3102, so that multiple first heat exchange sections 3102 and multiple first bending sections 3103 are alternately connected to form a multi-bending structure.

[0157] Correspondingly, the accommodating groove 213 further includes a connecting groove section 2132 . The connecting groove section 2132 is arc-shaped and bent and connected between two adjacent first groove sections 2131 . The first bending section 3103 is provided in the connecting groove section 2132 .

[0158] That is to say, the structure of the first heat exchange part 3101 can be set to the same as the structural shape of the first groove section 2131 and the connecting groove section 2132 of the accommodating groove 213, so that the first groove section 2131 and the connecting groove section 2132 can be used to limit the first heat exchange part 3101 in multiple directions, further improving the installation reliability and stability of the heat exchange body 312.

[0159] In the above technical solution, by setting the first bending section 3103, the fluid flow direction inside the first heat exchange part 3101 can be changed, and a smooth transition between the two first heat exchange sections 3102 can be achieved, thereby realizing a circuitous arrangement of the first heat exchange part 3101. As a result, the contact area between a single battery cell 10 and the first heat exchange part 3101 can be increased, thereby increasing the heat exchange area and improving the heat exchange efficiency of the first heat exchange part 3101.

[0160] At the same time, the arc-shaped first bend section 3103 can also 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 3101. In addition, the provision of the first bend section 3103 also makes the structure of the first heat exchange section 3101 more compact, occupying a smaller overall space, which is more conducive to the miniaturization design of the battery 100 and improves the volume energy density of the battery 100.

[0161] In addition, the accommodating groove 213 is configured to include a connecting groove section 2132, which can position the first bending section 3103, making the arrangement of the heat exchange channel 310 more stable, further improving the heat exchange efficiency, and thus improving the reliability of the battery 100.

[0162] In some specific examples of the present application, referring to FIG. 6 to FIG. 8 , the first bending section 3103 may be in the shape of a semicircular arc.

[0163] That is to say, the first bending section 3103 can extend along a semicircular arc line. Specifically, the first bending section 3103 can extend along a semicircular arc line that is raised in the direction away from the two first heat exchange sections 3102 connected by the first bending section 3103. The angle between the inlet and outlet of the first bending section 3103 is 180°, and the flow directions at the outlet and inlet positions of the first bending section 3103 are opposite, so that the two adjacent first heat exchange sections 3102 are closer together, and the structure of the entire first heat exchange section 3101 is more compact and reliable. Among them, the first bending section 3103 is used to connect two first heat exchange sections 3102 that are parallel to each other and arranged at intervals. In other embodiments, the bending degree of the first bending section 3103 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.

[0164] The two first heat exchange sections 3102 are formed into a "U"-shaped pipe through the first bending section 3103. The first heat exchange section 3101 can include one or more "U"-shaped pipes. Multiple "U"-shaped pipes are connected in sequence, and the connected "U"-shaped pipes are connected through the first bending section 3103.

[0165] In the above technical solution, by setting the first bending section 3103 to be semicircular, the design diversity of the heat exchange body 312 can be increased, and the adaptability of the heat exchange body 312 can be improved; at the same time, the semicircular structure is relatively simple, thereby reducing the production difficulty of the heat exchange body 312 and increasing the production speed of the heat exchange body 312.

[0166] Please refer to Figures 6 to 8 again. The heat exchange channel 310 also includes a second heat exchange part 3104, which is bent to form a U-shaped area 3104a. One end of the second heat exchange part 3104 is bent and connected to one end of the first heat exchange part 3101, and the first heat exchange part 3101 is arranged in the U-shaped area 3104a. The first heat exchange part 3101 and the second heat exchange part 3104 are bent in the same plane.

[0167] The accommodating groove 213 further includes a second groove section 2133, which is connected to the first groove section 2131. The second heat exchange portion 3104 is disposed in the second groove section 2133. In other words, the shape of the accommodating groove 213 can be consistent with the shape of the heat exchange channel 310. Thus, the accommodating groove 213 can be used to limit the heat exchange body 312 in multiple directions, ensuring a good fit between the heat exchange body 312 and the bottom wall 211 of the housing 21, thereby improving the installation reliability and stability of the heat exchange body 312.

[0168] The above “the second heat exchange part 3104 is bent to form a U-shaped area 3104a, and the first heat exchange part 3101 is bent and arranged in the U-shaped area 3104a” is intended to explain that the second heat exchange part 3104 is arranged on the circumferential periphery of the first heat exchange part 3101, and can be arranged on the three circumferential sides of the first heat exchange part 3101. The second heat exchange part 3104 can be arranged closer to the circumferential edge of the battery relative to the first heat exchange part 3101.

[0169] The second heat exchange portion 3104 is bent to form a U-shaped area 3104a, that is, in the direction from one end of the second heat exchange portion 3104 toward the other end, the second heat exchange portion 3104 extends along the U-shaped line to form the U-shaped area 3104a.

[0170] The first heat exchange part 3101 is bent and arranged in the U-shaped area 3104a, that is, the first heat exchange part 3101 is arranged in the space enclosed by the second heat exchange part 3104, and the first heat exchange part 3101 extends along a non-straight line on the inner side of the second heat exchange part 3104 and has at least one bending position.

[0171] It should be noted that, in this embodiment, only the first heat exchange portion 3101 is limited to being bent and arranged within the U-shaped region 3104a, and the bending form of the first heat exchange portion 3101 is not limited. That is, the specific bending form of the first heat exchange portion 3101 can be designed according to the heat exchange requirements of the battery. For example, the first heat exchange portion 3101 can extend along the length direction of the battery cell 10 (i.e., the X direction in FIG12 ), and after extending to a certain length, bend toward the width direction of the battery cell 10 (i.e., the Y direction in FIG12 ), and then continue to extend along the length direction of the battery cell 10 and bend along the width direction. Alternatively, the first heat exchange portion 3101 can extend along the width direction of the battery cell 10, and after extending to a certain length, bend toward the length direction of the battery cell 10, and then continue to extend along the width direction of the battery cell 10 and bend along the length direction.

[0172] The first heat exchange part 3101 and the second heat exchange part 3104 are connected in a bent manner, that is, one end of the first heat exchange part 3101 is connected to one end of the second heat exchange part 3104, and the connection position between the first heat exchange part 3101 and the second heat exchange part 3104 is a bent non-linear structure. For example, the connection position between the first heat exchange part 3101 and the second heat exchange part 3104 can be bent into an arc segment.

[0173] Among them, the first heat exchange part 3101 and the second heat exchange part 3104 are connected, so that one of the end of the first heat exchange part 3101 away from the second heat exchange part 3104 and the end of the second heat exchange part 3104 away from the first heat exchange part 3101 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 part 3101 is exchanging heat, the heat exchange fluid can flow from the first heat exchange part 3101 to the second heat exchange part 3104, or from the second heat exchange part 3104 to the first heat exchange part 3101.

[0174] The first heat exchange portion 3101 and the second heat exchange portion 3104 are bent in the same plane. Specifically, the first heat exchange portion 3101 and the second heat exchange portion 3104 can be bent in a plane perpendicular to the third direction, and the plane can be parallel to the surface of the battery cell assembly 101 on one side in the third direction. This allows the heat exchange channel 310 to exchange heat with the battery cell assembly 101 in the same plane. This simplifies the structure of the heat exchange channel 310, reduces the difficulty of producing the heat exchange channel 310, and reduces the space occupied by the heat exchange channel 310.

[0175] It is understandable that as the heat exchange fluid flows through the first heat exchange section 3101, 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 31 cools the battery cell assembly 101, the heat from the battery cell 10 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 section 3101, the temperature difference between the heat exchange fluid and the battery cell 10 gradually decreases, and the heat exchange efficiency gradually decreases. When the first heat exchange element 31 heats the battery cell assembly 101, the heat in the heat exchange fluid is gradually transferred to the battery cell 10, causing the temperature of the heat exchange fluid to gradually decrease as it flows along the first heat exchange section 3101, the temperature difference between the heat exchange fluid and the battery cell 10 gradually decreases, and the heat exchange efficiency gradually decreases.

[0176] When the first heat exchange element 31 dissipates heat and cools the battery core assembly 101 , the heat exchange fluid may also flow from the first heat exchange part 3101 to the second heat exchange part 3104 , or the heat exchange fluid may also flow from the second heat exchange part 3104 to the first heat exchange part 3101 . When the heat exchange fluid also flows from the first heat exchange part 3101 to the second heat exchange part 3104, the battery cells 10 in the middle of the battery (that is, the internal battery cells 10 on the inner side of the periphery) can be cooled first, and then the battery cells 10 at the peripheral position of the battery can be cooled. Since the heat dissipation of the battery cells 10 at the peripheral position of the battery is better than that of the internal battery cells 10, the heat exchange fluid with a lower temperature in the first heat exchange part 3101 can better meet the heat dissipation requirements of the battery cells 10 in the middle position of the battery. At the same time, since the battery cells 10 at the peripheral position can directly dissipate heat naturally toward the external environment, when the temperature of the heat exchange fluid in the second heat exchange part 3104 is slightly higher, it can still meet the heat dissipation requirements of the peripheral battery cells 10, so that the cooling effects obtained by the battery cells 10 at the peripheral position of the battery and the battery cells 10 in the middle position of the battery are roughly the same, and then the temperatures of the battery cells 10 at the peripheral position of the battery and the battery cells 10 in the middle position of the battery after cooling and heat dissipation are relatively consistent, so that the temperature distribution in the battery is more uniform.

[0177] When the first heat exchange component 31 heats the battery cell assembly 101, the heat exchange fluid can also flow from the first heat exchange part 3101 to the second heat exchange part 3104, but the heat exchange fluid can also flow from the second heat exchange part 3104 to the first heat exchange part 3101. For example, when the heat exchange fluid flows from the second heat exchange part 3104 to the first heat exchange part 3101, the battery cells 10 at the periphery of the battery cell assembly 101 can be heated first, and then the heat exchange fluid cools the battery cells 10 at the middle of the battery cell assembly 101. Since the battery cells 10 at the periphery of the battery dissipate more heat to the external environment, the temperature of the battery cells 10 at the periphery of the battery is more likely to drop. The heat exchange fluid first heats the battery cells 10 at the periphery of the battery. The higher temperature heat exchange fluid can increase the temperature of the battery cells 10 at the periphery while compensating for the heat lost by the battery cells 10 due to heat dissipation to the external environment. To meet its heating needs, the battery cell 10 in the middle of the battery cell assembly 101 has a small contact area with the external environment and less heat loss. The lower temperature heat exchange fluid flowing in the first heat exchange part 3101 can cooperate with the heat generated by the battery cell 10 itself to meet its heating needs well. As a result, the heating effects obtained by the battery cells 10 at the periphery of the battery and the battery cells 10 at the middle of the battery cell assembly 101 can be basically the same, thereby making the temperatures of the battery cells 10 at the periphery of the battery and the battery cells 10 at the middle of the battery cell assembly 101 more consistent after heating, making the temperature distribution inside the battery more uniform.

[0178] In the above technical solution, the second heat exchange part 3104 is bent to form a U-shaped area 3104a, and the first heat exchange part 3101 is bent and arranged in the U-shaped area 3104a. When the first heat exchange part 31 exchanges heat with the battery cell assembly 101, the U-shaped area 3104a formed by the outer second heat exchange part 3104 can be opposite to the outer battery cell 10 of the battery, and the first heat exchange part 3101 in the U-shaped area 3104a can be opposite to the internal battery cell 10, so that the first heat exchange part 31 can make up for the internal and external temperature difference caused by the heat exchange between the outer battery cell 10 and the environment, so that the heat exchange effect of the battery cell 10 outside the battery cell assembly 101 and the battery cell 10 inside the battery cell assembly 101 tends to be consistent, thereby improving the temperature uniformity of the battery, thereby improving the battery life to a certain extent.

[0179] In addition, by setting the accommodating groove 213 to also include a second groove section 2133, the second groove section 2133 can position the second heat exchange part 3104, making the arrangement of the heat exchange channel 310 more stable, further improving the heat exchange efficiency, and thus improving the reliability of the battery 100.

[0180] 6-8 , the heat exchange channel 310 further includes a third heat exchange portion 3109 . The first heat exchange portion 3101 is connected between the third heat exchange portion 3109 and the second heat exchange portion 3104 . One end of the third heat exchange portion 3109 is connected to the other end of the first heat exchange portion 3101 , and the other end of the third heat exchange portion 3109 is connected to the current collector 315 .

[0181] In the above technical solution, the heat exchange channel 310 is configured to include a first heat exchange part 3101, a second heat exchange part 3104 and a third heat exchange part 3109. On the one hand, the heat exchange channel 310 can be connected to the thermal management component of the battery 100. On the other hand, the heat exchange channel 310 can be formed into a bent structure, thereby increasing the contact area between the heat exchange channel 310 and the battery cell assembly 101, improving the heat exchange efficiency of the heat exchange channel 310, making the temperature of the battery cell assembly 101 more balanced, and thus improving the reliability of the battery 100.

[0182] Optionally, the number of the heat exchange channel 310 is one, which has a simple structure and is more convenient to control.

[0183] Optionally, there are multiple heat exchange channels 310, which are arranged in parallel, and their projections on the bottom wall 211 of the housing 21 do not overlap. For example, the multiple heat exchange channels 310 can be arranged at intervals or around each other.

[0184] In the above technical solution, by setting up multiple heat exchange channels 310, on the one hand, the length of a single heat exchange channel 310 can be reduced and the arrangement of a single heat exchange channel 310 can be simplified, thereby improving the heat exchange efficiency and helping to improve the reliability of the battery 100. On the other hand, the arrangement, setting position and distribution area of ​​multiple heat exchange channels 310 can be selected as needed to meet different heat exchange requirements.

[0185] In addition, by providing multiple heat exchange channels 310 , the heat exchange fluid can simultaneously exchange heat with different battery cells 102 along the multiple heat exchange channels 310 , thereby improving the heat exchange efficiency of the battery cell assembly 101 and, to a certain extent, making the heat exchange effect of the battery cell assembly 101 better.

[0186] As shown in Figure 6, in this embodiment, the heat exchange body 312 defines three heat exchange channels 310, each heat exchange channel 310 has a first inlet and outlet 3109a at one end and a second inlet and outlet 3109b at the other end, the first inlet and outlet 3109a of the three heat exchange channels 310 is connected to one of the collectors 315, and the second inlet and outlet 3109b of the three heat exchange channels 310 is connected to another collector 315.

[0187] Each heat exchange channel 310 includes a first heat exchange part 3101, a second heat exchange part 3104 and a third heat exchange part 3109. The two ends of the first heat exchange part 3101 are respectively connected to one end of the second heat exchange part 3104 and one end of the third heat exchange part 3109, the other end of the second heat exchange part 3104 is connected to one of the collectors 315, and the other end of the third heat exchange part 3109 is connected to another of the collectors 315.

[0188] The first heat exchange part 3101 of each heat exchange channel 310 includes multiple first heat exchange sections 3102 and multiple first bending sections 3103. The multiple first heat exchange sections 3102 are arranged along the first direction, and the length direction of each first heat exchange section 3102 extends along the second direction. The multiple first heat exchange sections 3102 are connected by bending in sequence end to end through the multiple first bending sections 3103, so that the first heat exchange part 3101 forms a multi-bending structure.

[0189] The second heat exchange portion 3104 of one of the heat exchange channels 310 forms a U-shaped structure, so that it can be arranged on the periphery of the first heat exchange portion 3101 of the heat exchange channel 310 and the remaining two heat exchange channels 310. The second heat exchange portion 3104 of the heat exchange channel 310 includes two second heat exchange sections 3105 and one third heat exchange section 3107. The two second heat exchange sections 3105 are arranged on opposite sides of the first heat exchange portion 3101. Each second heat exchange section 3105 extends along the second direction, and the third heat exchange section 3107 extends along the first direction. One end of the third heat exchange section 3107 is connected to one of the second heat exchange sections 3105 by a second bending section 3106, and the other end of the third heat exchange section 3107 is connected to the other second heat exchange section 3105 by a second bending section 3106. One end of one of the second heat exchange sections 3105 is connected to the first heat exchange portion 3101 by the second bending section 3106.

[0190] The second heat exchange portions 3104 of the other two heat exchange channels 310 also form a U-shaped structure, so that they can be arranged on the periphery of the first heat exchange portions 3101 of the corresponding heat exchange channels 310 .

[0191] In the above technical solution, by arranging two second heat exchange sections 3105 and one third heat exchange section 3107 on three sides of the first heat exchange part 3101 respectively, the second heat exchange part 3104 can surround the first heat exchange part 3101, thereby increasing the compactness of the arrangement of the first heat exchange part 3101 and realizing the miniaturization of the structure of the first heat exchange part 3101, which is beneficial to ensuring the volume energy density of the battery 100. At the same time, it can also simplify the structure of the first heat exchange part 3101 and facilitate the processing and production of the first heat exchange part 31.

[0192] As shown in Figure 7, in this embodiment, the heat exchange body 312 defines two heat exchange channels 310, and the two heat exchange channels 310 are symmetrically arranged about the center line of the box body 21 extending along the second direction. Each heat exchange channel 310 has a first inlet and outlet 3109a at one end and a second inlet and outlet 3109b at the other end. The first inlet and outlet 3109a and the second inlet and outlet 3109b of the two heat exchange channels 310 are both connected to the same collector 315.

[0193] Each heat exchange channel 310 includes a first heat exchange part 3101, a second heat exchange part 3104 and a third heat exchange part 3109. The two ends of the first heat exchange part 3101 are respectively connected to one end of the second heat exchange part 3104 and one end of the third heat exchange part 3109, the other end of the second heat exchange part 3104 is connected to one of the collectors 315, and the other end of the third heat exchange part 3109 is connected to another of the collectors 315.

[0194] The first heat exchange part 3101 of each heat exchange channel 310 includes multiple first heat exchange sections 3102 and multiple first bending sections 3103. The multiple first heat exchange sections 3102 are arranged along the first direction, and the length direction of each first heat exchange section 3102 extends along the second direction. The multiple first heat exchange sections 3102 are bent and connected in sequence through the multiple first bending sections 3103, so that the first heat exchange part 3101 forms a multi-bending structure.

[0195] The second heat exchange portion 3104 of each heat exchange channel 310 forms a U-shaped structure, so that it can be arranged on the periphery of the first heat exchange portion 3101 of the heat exchange channel 310 and the remaining two heat exchange channels 310. The second heat exchange portion 3104 of the heat exchange channel 310 includes a second heat exchange section 3105 and two third heat exchange sections 3107. The two third heat exchange sections 3107 are arranged on opposite sides of the first heat exchange section 3101. Each third heat exchange section 3107 extends along the first direction, and the second heat exchange section 3105 extends along the second direction. The two ends of the second heat exchange section 3105 are respectively connected to one end of the two third heat exchange sections 3107 through the second bending section 3106, and the other end of one of the third heat exchange sections 3107 is connected to the first bending portion through the second bending section 3106.

[0196] In the above technical solution, by setting up two symmetrically arranged heat exchange channels 310, the heat exchange fluid can be simultaneously introduced into both sides of the battery cell assembly 101 for heat exchange. The large inlet flow rate can shorten the length of a single heat exchange channel 310 and reduce the pressure drop in the heat exchange channel 310, thereby greatly improving the heat exchange efficiency of the battery 100.

[0197] As shown in Figure 8, in this embodiment, the heat exchange body 312 defines two heat exchange channels 310, each heat exchange channel 310 has a first inlet and outlet 3109a at one end and a second inlet and outlet 3109b at the other end, the first inlet and outlet 3109a of the two heat exchange channels 310 is connected to one of the collectors 315, and the second inlet and outlet 3109b of the two heat exchange channels 310 is connected to the other collector 315.

[0198] Each heat exchange channel 310 includes a first heat exchange part 3101, a second heat exchange part 3104 and a third heat exchange part 3109. The two ends of the first heat exchange part 3101 are respectively connected to one end of the second heat exchange part 3104 and one end of the third heat exchange part 3109, the other end of the second heat exchange part 3104 is connected to one of the collectors 315, and the other end of the third heat exchange part 3109 is connected to another of the collectors 315.

[0199] The first heat exchange part 3101 of each heat exchange channel 310 includes multiple first heat exchange sections 3102 and multiple first bending sections 3103. The multiple first heat exchange sections 3102 are arranged along the first direction, and the length direction of each first heat exchange section 3102 extends along the second direction. The multiple first heat exchange sections 3102 are bent and connected in sequence through the multiple first bending sections 3103, so that the first heat exchange part 3101 forms a multi-bending structure.

[0200] The second heat exchange portion 3104 of one of the heat exchange channels 310 forms a U-shaped structure, so that it can be arranged on the first heat exchange portion 3101 of the heat exchange channel 310 and the periphery of the remaining heat exchange channel 310. The second heat exchange portion 3104 of the heat exchange channel 310 includes two second heat exchange sections 3105 and one third heat exchange section 3107. The two second heat exchange sections 3105 are arranged on opposite sides of the first heat exchange portion 3101. Each second heat exchange section 3105 extends along the second direction, and the third heat exchange section 3107 extends along the first direction. One end of the third heat exchange section 3107 is connected to one of the second heat exchange sections 3105 by a second bending section 3106, and the other end of the third heat exchange section 3107 is connected to the other second heat exchange section 3105 by a second bending section 3106. One end of one of the second heat exchange sections 3105 is connected to the first heat exchange portion 3101 by the second bending section 3106.

[0201] Please refer to Figures 9-12. Figure 9 is a schematic diagram of the assembly of a battery 100 according to yet another embodiment of the present application; Figure 10 is a cross-sectional view of the structure along line AA in Figure 9; Figure 11 is a cross-sectional view of the structure along line BB in Figure 9; and Figure 12 is a partially enlarged view of the structure shown in Figure 11. The heat exchange body 312 comprises flat tubes, which define heat exchange channels 310. The two walls of the flat tubes in the thickness direction have smooth surfaces and a large contact area, which increases the heat transfer area and, in turn, the heat exchange efficiency of the heat exchange body 312.

[0202] The flat tube is disposed in the accommodating groove 213 , and two walls of the flat tube that are opposite to each other in the thickness direction are fixedly connected to the battery cell assembly 101 and the bottom wall 211 of the box assembly 20 , respectively.

[0203] In the above technical solution, the heat exchange body 312 is configured to include flat tubes. On the basis of reducing material costs, on the one hand, the contact area between the heat exchange body 312 and the battery cell assembly 101 can be increased, and the heat exchange efficiency can be improved, thereby improving the reliability of the battery 100. On the other hand, the flat tubes occupy a small space, which is conducive to increasing the capacity of the battery 100 and reducing the weight, volume and cost of the battery 100.

[0204] According to some embodiments of the present application, the flat tube can be formed by bending a single tube.

[0205] Single tube bending refers to the process of bending a flat tube multiple times from a single straight tube through processes such as rolling. For example, a single straight tube can be bent at multiple preset locations to form a V- or U-shape. The bending shape of a single tube can be designed based on actual conditions.

[0206] In the above embodiment, by setting the flat tube to be bent and formed by a single tube, the number of welding points of the heat exchange body 312 can be reduced, thereby reducing the risk of leakage of the heat exchange body 312 and improving the reliability of the use of the heat exchange body 312; at the same time, the operation process of bending and forming a single tube is simpler than the manufacturing process of the plate structure, thereby significantly reducing the cost of the heat exchange body 312.

[0207] According to some embodiments of the present application, the flat tube is bent in an arc shape at the bending position.

[0208] 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 flat tube at the bending position can increase the flow rate of the heat exchange fluid in the heat exchange flow channel, thereby increasing the heat exchange efficiency of the heat exchange body 312.

[0209] In the above embodiment, by setting the flat 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 body 312.

[0210] Please refer to Figures 13-15. Figure 13 is a schematic diagram of the assembly of a battery 100 according to another embodiment of the present application; Figure 14 is a schematic diagram of the structure of the first heat exchange element 31 of the battery 100 shown in Figure 13; and Figure 15 is a top view of the battery 100 shown in Figure 13. The heat exchange body 312 includes a heat exchange plate 313.

[0211] In the above technical solution, by setting the heat exchange body 312 as a heat exchange plate 313, on the one hand, the connection area between the heat exchange body 312 and the bottom wall 211 of the box body 21 can be increased, thereby improving the connection reliability between the heat exchange body 312 and the bottom wall 211 of the box body 21; on the other hand, the contact area between the heat exchange body 312 and the battery cell assembly 101 can be increased, thereby improving the heat exchange efficiency of the heat exchange body 312 and thereby improving the reliability of the battery 100.

[0212] In addition, the heat exchange plate 313 has a more stable structure, higher structural strength, and is not easily damaged, thereby extending the service life of the first heat exchange element 31 .

[0213] Referring further to Figures 16-19, Figure 16 is a cross-sectional view of the structure along line CC in Figure 15; Figure 17 is a partially enlarged view of the structure shown in Figure 16; Figure 18 is a cross-sectional view of the structure along line DD in Figure 15; and Figure 19 is a partially enlarged view of the structure shown in Figure 18. The heat exchange plate 313 includes a first plate portion 3131 and a second plate portion 3132. The second plate portion 3132 covers one side of the first plate portion 3131 in the thickness direction, and a heat exchange channel 310 is defined between the second plate portion 3132 and the first plate portion 3131.

[0214] The first plate portion 3131 is fixedly connected to the battery cell assembly 101 , the second plate portion 3132 is fixedly connected to the bottom wall 211 of the box assembly 20 , and the second plate portion 3132 has a protrusion 3133 , and the protrusion 3133 is disposed in the accommodating groove 213 .

[0215] In the above technical solution, the above-mentioned heat exchange channel 310 can be defined by at least two plate portions. On the basis of meeting the heat exchange needs, the connection reliability between the heat exchange body 312 and the bottom wall 211 of the box body 21, and between the heat exchange body 312 and the battery cell assembly 101 can be improved; a protrusion 3133 is formed on the second plate portion 3132, so that the protrusion 3133 cooperates with the accommodating groove 213. On the one hand, the accommodating groove 213 can be used to position the second plate portion 3132, thereby improving the installation stability and reliability of the heat exchange body 312, thereby improving the reliability of the battery 100. On the other hand, the connection area between the heat exchange body 312 and the bottom wall 211 of the box body 21 can be increased, thereby improving the reliability of the heat exchange body 312 fixed on the box body 21.

[0216] Referring again to Figures 16 and 17 , the heat exchange plate 313 is bent upward at one end near the current collector 315, allowing the current collector 315 to extend in the second direction and connect to one side in the thickness direction of the heat exchange plate 313. This arrangement facilitates the current collector 315 to pass through the first expansion beam 61 or the second expansion beam 62 described below.

[0217] Please refer again to Figure 19 and further to Figure 20, which is a schematic diagram of the structure of the case 21 and other parts of the battery 100 shown in Figure 13. The accommodating groove 213 on the bottom wall 211 of the case 21 includes a plurality of first groove sections 2131, a plurality of connecting groove sections 2132, and a second groove section 2133. The plurality of first groove sections 2131 are arranged along the first direction, and each first groove section 2131 extends along the second direction. The connecting groove section 2132 is bent and connected between two adjacent first groove sections 2131. The second groove section 2133 extends and bends around the circumference of the plurality of first groove sections 2131.

[0218] The second plate portion 3132 of the heat exchange plate 313 is formed with protrusions 3133 at positions corresponding to the multiple first heat exchange sections 3102, the multiple first bending sections 3103 and the second heat exchange section 3104. The protrusions 3133 corresponding to the multiple first heat exchange sections 3102 can cooperate with the multiple first groove sections 2131, the protrusions 3133 corresponding to the multiple connecting groove sections 2132 can cooperate with the multiple connecting groove sections 2132, and the protrusions 3133 corresponding to the second heat exchange section 3104 can cooperate with the second groove section 2133.

[0219] Please refer again to Figure 7 and further to Figures 21 and 22. Figure 21 is a schematic structural diagram of the current collector 315 of the battery 100 according to some other embodiments of the present application; Figure 22 is a cross-sectional structural view of the current collector 315 shown in Figure 21. The current collector 315 includes a tube body 3151, a first flow channel interface 3152, and a second flow channel interface 3153. The first flow channel interface 3152 is connected to the first inlet and outlet 3109a of the heat exchange channel 310, and the second flow channel interface 3153 is connected to the second inlet and outlet 3109b of the heat exchange channel 310.

[0220] The current collector 315 further includes a separation structure 3154 . The separation structure 3154 is disposed inside the tube body 3151 . The separation structure 3154 separates the first flow channel interface 3152 from the second flow channel interface 3153 inside the tube body 3151 .

[0221] Specifically, the pipe body 3151 can be used for the collection and diversion of heat exchange fluid; the first flow channel interface 3152 and the second flow channel interface 3153 are arranged on the pipe body 3151, and the first flow channel interface 3152 and the second flow channel interface 3153 are respectively connected to the inlet and outlet of the heat exchange channel, and are used to input and output the heat exchange fluid into the collecting pipe.

[0222] The partition structure 3154 is disposed within the tube body 3151 and separates the first flow channel interface 3152 and the second flow channel interface 3153 within the tube body 3151. That is, the first flow channel interface 3152 and the second flow channel interface 3153 are not connected within the tube body 3151. This allows the first flow channel interface 3152 and the second flow channel interface 3153 to serve as the input and output ends of the heat exchange channel, respectively. This allows the tube body 3151 and the heat exchange channel to form a complete channel, allowing the heat exchange fluid to enter the heat exchange channel from the tube body 3151, undergo heat exchange, and then be discharged from the tube body 3151, completing the heat exchange process. Therefore, a single tube body 3151 can be used to complete both liquid inlet and outlet operations, thereby reducing the number of manifolds used and, consequently, reducing the production cost and space occupied by the thermal management assembly of the battery 100.

[0223] In the above technical solution, by setting the tube body 3151, the first inlet and outlet 3109a and the second inlet and outlet 3109b of the heat exchange channel 310 are integrated into one, and by setting a partition structure 3154 inside the tube body 3151, the first channel interface 3152 and the second channel interface 3153 are separated, so that the interior of the tube body 3151 can be partitioned so that the liquid inlet and discharge processes do not affect each other.

[0224] 7 and 21 , the number of heat exchange channels 310, first channel interfaces 3152, and second channel interfaces 3153 are each multiple. For example, the number of first channel interfaces 3152 and second channel interfaces 3153 can be two, three, or more. The multiple first channel interfaces 3152 correspond one-to-one to and are connected to the multiple first inlets and outlets 3109a of the heat exchange channels 310, and the multiple second channel interfaces 3153 correspond one-to-one to and are connected to the multiple second inlets and outlets 3109b of the heat exchange channels 310.

[0225] In the above technical solution, by setting multiple first flow channel interfaces 3152 and multiple second flow channel interfaces 3153, the collector 315 can be used to bring together multiple first inlets and outlets 3109a of multiple heat exchange channels 310, and bring together multiple second inlets and outlets 3109b of multiple heat exchange channels 310. On the one hand, the temperature of the heat exchange fluid in the multiple heat exchange channels 310 can be made more balanced, thereby improving the heat exchange efficiency of the first heat exchange component 31, which is beneficial to improving the reliability of the battery 100. On the other hand, it can facilitate the installation of the first heat exchange component 31.

[0226] Among them, multiple first flow channel interfaces 3152 are connected inside the tube body 3151; and / or, multiple second flow channel interfaces 3153 are connected inside the tube body 3151. The collector 315 can be used to bring together multiple first inlets and outlets 3109a of multiple heat exchange channels 310, and bring together multiple second inlets and outlets 3109b of multiple heat exchange channels 310, so that the temperature of the heat exchange fluid in the multiple heat exchange channels 310 is more balanced.

[0227] Specifically, multiple second flow channel interfaces 3153 are connected inside the tube body 3151, and along the extension direction of the tube body 3151, at least two second flow channel interfaces 3153 are respectively located on both sides of the first flow channel interface 3152, that is, at least two second flow channel interfaces 3153 are arranged at both ends of the tube body 3151, and multiple first flow channel interfaces 3152 are arranged between at least two second flow channel interfaces 3153.

[0228] In this way, the heat exchange fluid can flow out of the tube body 3151 from the second flow channel interfaces 3153 on both sides, and then flow back to the tube body 3151 from the first flow channel interface 3152 in the middle after heat exchange. Alternatively, the heat exchange fluid can flow out of the tube body 3151 from the first flow channel interface 3152 in the middle area of ​​the tube body 3151, and then flow back to the tube body 3151 from the second flow channel interfaces 3153 at both ends of the tube body 3151 after heat exchange. In this way, the heat exchange fluid can flow from the periphery of the battery 100 to the middle area to achieve heat exchange, or from the middle area of ​​the battery 100 to the periphery to achieve heat exchange, thereby improving the temperature uniformity of the battery 100, thereby reducing the assembly steps and installation space of the thermal management component, improving the temperature uniformity of the battery 100, and extending the service life of the battery 100.

[0229] In the above technical solution, by setting the collector 315, the partition structure 3154 is used to separate the multiple first flow channel interfaces 3152 and the multiple second flow channel interfaces 3153, and the multiple second flow channel interfaces 3153 are connected in the tube body 3151, so that the first flow channel interface 3152 and the second flow channel interface 3153 can be formed as the input end and the output end of the heat exchange flow channel respectively, and then the work of liquid inlet and liquid discharge can be completed by using one tube body 3151, thereby reducing the number of collector pipes used and, at the same time, reducing the number of external connecting pipes. The use of the second flow channel interface 3153 can reduce the production cost and occupied space of the heat exchange management component, and reduce the assembly steps and installation space of the heat management component; in addition, the second flow channel interface 3153 includes multiple, and at least two second flow channel interfaces 3153 are located on both sides of the first flow channel interface 3152, which can enable the heat exchange fluid to flow from the surrounding area of ​​the battery 100 to the central area to achieve heat exchange, and can also enable the heat exchange fluid to flow from the central area of ​​the battery 100 to the surrounding area to achieve heat exchange, thereby improving the temperature uniformity of the battery 100 and extending the service life of the battery 100.

[0230] 21 and 22 , the tube body 3151 can be divided into a first space 3151a and a second space 3151b that are independent of each other by a partition structure 3154. The first space 3151a is connected to the first flow channel interface 3152, and the second space 3151b is connected to the second flow channel interface 3153. Along the extension direction of the tube body 3151, the second space 3151b includes a first section, a second section and a third section that are connected in sequence. The first section and the third section are respectively located on both sides of the first space 3151a, and the second section is side by side with the first space 3151a.

[0231] Specifically, the first space 3151a and the second space 3151b can be independent of each other and not connected to each other, forming two independent flow channels. The second space 3151b includes a first section, a second section, and a third section that are connected in sequence. The first section and the third section are each provided with a second flow channel interface 3153. The second space 3151b can connect multiple second flow channel interfaces 3153. The first space 3151a and the second section are arranged side by side, and the first space 3151a is connected to the first flow channel interface 3152. The first flow channel interface 3152 is further provided in the middle of the multiple second flow channel interfaces 3153.

[0232] For example, as shown in reference figures 21 and 22, there are two first flow channel interfaces 3152 and two second flow channel interfaces 3153, and the two second flow channel interfaces 3153 are arranged on both sides of the two first flow channel interfaces 3152. In the length direction of the tube body 3151, the second space 3151b is "C"-shaped, and the first space 3151a is arranged parallel to the second section and is arranged between the first section and the third section.

[0233] In the above technical solution, by setting the first space 3151a and the second space 3151b to be independent of each other and not connected to each other, two independent flow channels can be formed inside the tube body 3151, so that the inflow and discharge of the heat exchange fluid do not interfere with each other. At the same time, the first space 3151a and the second space 3151b are arranged side by side, thereby reducing the size of the tube body 3151, thereby reducing the space occupied by the collecting pipe.

[0234] Furthermore, as shown in Figures 21 and 22, the partition structure 3154 may include a first partition plate 3154a and a second partition plate 3154b, the first partition plate 3154a is used to separate the second section and the first space 3151a, the second partition plate 3154b includes at least two and is respectively located at both ends of the first partition plate 3154a along the extension direction of the tube body 3151, the second partition plate 3154b is used to separate the first section and the first space 3151a, as well as, the third section and the first space 3151a.

[0235] Specifically, the first partition plate 3154a can be formed into a plate body of a certain size. The size of the first partition plate 3154a can be set according to the position size of the tube body 3151 and the first flow channel interface 3152. The first partition plate 3154a extends along the length direction of the tube body 3151 (for example, the X direction shown in Figure 21). The two ends of the first partition plate 3154a in the width direction are sealed and connected to the inner wall surface of the tube body 3151. In the width direction of the tube body 3151 (for example, the Y direction shown in Figure 21), it is used to separate the second section and the first space 3151a, so that the second section and the first space 3151a are arranged side by side in the width direction of the tube body 3151.

[0236] The second partition plates 3154b include at least two, that is, the second partition plates 3154b may include two, three or more. When the second partition plates 3154b only include two, the second partition plates 3154b are respectively located at both ends of the first partition plate 3154a in the length direction, and are sealed with the first partition plate 3154a and the inner wall surface of the tube body 3151, so that the first space 3151a and the second space 3151b can be completely independent and not connected to each other.

[0237] In this embodiment, by providing the first partition plate 3154 a and the second partition plate 3154 b , two independent spaces can be formed inside the tube body 3151 , thereby preventing the inflow and outflow of liquid from interfering with each other, thereby improving the heat exchange effect of the battery 100 .

[0238] Please refer to Figures 3-4, 6 and 8 again. There are multiple heat exchange channels 310, and the collectors 315 include two. One of the collectors 315 has multiple liquid inlet interfaces 3155, and the multiple liquid inlet interfaces 3155 correspond one-to-one to and are connected with the first inlets and outlets 3109a of the multiple heat exchange channels 310. The other collector 315 has multiple liquid discharge interfaces 3156, and the multiple liquid discharge interfaces 3156 correspond one-to-one to and are connected with the second inlets and outlets 3109b of the multiple heat exchange channels 310.

[0239] The heat exchange fluid entering from one of the current collectors 315 can flow into the corresponding heat exchange channels 310 from the first inlets and outlets 3109a of the multiple heat exchange channels 310 respectively, and finally flow into another current collector 315 from the second inlets and outlets 3109b of the multiple heat exchange channels 310.

[0240] In the above technical solution, by providing two current collectors 315, one of the current collectors 315 is used for liquid inlet and the other is used for liquid discharge, the structure of the current collectors 315 can be simplified, and the inflow and outflow of the heat exchange fluid can be easily controlled.

[0241] In some embodiments, the battery cell assembly 101 includes multiple battery cells 102, the battery cells 102 include multiple battery cells 10, and the multiple battery cells 10 of each battery cell 102 are arranged along a first direction, and the multiple battery cells 102 are arranged along a second direction, and the first direction and the second direction are arranged at an angle to each other.

[0242] Please refer to Figures 23 and 24. Figure 23 is a schematic diagram of the assembly of the battery 100 according to some other embodiments of the present application from one perspective; Figure 24 is a schematic diagram of the assembly of the battery 100 according to some other embodiments of the present application from another perspective. A plurality of first heat exchange segments 3102 are arranged at intervals along the second direction, and each first heat exchange segment 3102 extends along the first direction. A plurality of first trough segments 2131 are arranged at intervals along the second direction, and each first trough segment 2131 extends along the first direction.

[0243] That is, the arrangement direction of the first heat exchange section 3102 is consistent with the arrangement direction of the multiple battery units 102 , and the arrangement direction of the first heat exchange section 3102 is set at an angle to the arrangement direction of the multiple battery cells 10 in each battery unit 102 .

[0244] In the above technical solution, by limiting the arrangement direction of multiple first heat exchange sections 3102 and the extension direction of each first heat exchange section 3102, multiple battery cells 10 in each battery unit 102 can be in contact with the same first heat exchange section 3102, and multiple battery cells 102 can be in contact with multiple first heat exchange sections 3102, so that the heat exchange of multiple battery cells 10 can be more uniform, which is beneficial to improving the reliability of the battery 100.

[0245] In addition, by limiting the arrangement direction of the multiple first slot sections 2131 and the extension direction of each first slot section 2131, the multiple first slot sections 2131 can position the multiple first heat exchange sections 3102, making the arrangement of the heat exchange channel 310 more stable, further improving the heat exchange efficiency, and thus improving the reliability of the battery 100.

[0246] 23 and 24 again, the heat exchange body 312 includes a plurality of heat exchange tubes 314, and the plurality of heat exchange tubes 314 are spaced apart along the second direction, and each heat exchange tube 314 defines a first heat exchange section 3102. By configuring the heat exchange body 312 to include a plurality of heat exchange tubes 314, the material used in the heat exchange body 312 can be reduced, thereby reducing costs.

[0247] Please refer to Figures 25 and 26. Figure 25 is an exploded view of the structure of the battery 100 shown in Figure 24; Figure 26 is an enlarged view of section E shown in Figure 25. Each heat exchange tube 314 includes a first tube segment 3141 and two second tube segments 3142. The first tube segment 3141 extends along a first direction and defines a first heat exchange section 3102. The two second tube segments 3142 extend along a third direction. One end of the two first tube segments 3141 is connected to the two ends of the first tube segment 3141, respectively, and the other ends of the two first tube segments 3141 are connected to the current collector 315.

[0248] The second tube section 3142 is located between the bottom of the battery cell assembly 101 and the bottom wall 211 of the box body 21 . The second tube section 3142 is located between the peripheral wall of the battery cell assembly 101 and the box body 21 .

[0249] In the above technical solution, by setting the heat exchange tube 314 to the above structure, the structure of the heat exchange tube 314 can correspond to the bottom wall 211 and the surrounding wall 212 of the box body 21, and the structure of the heat exchange tube 314 can correspond to the bottom and side of the battery cell assembly 101, thereby increasing the contact area between the heat exchange tube 314 and the battery cell assembly 101, improving the heat exchange efficiency of the first heat exchange component 31, and thereby improving the reliability of the battery 100.

[0250] In the above technical solution, the heat exchange body 312 is configured to include a flat tube. Since the flat tube occupies a small space, it is beneficial to increase the capacity of the battery 100 and reduce the weight, volume and cost of the battery 100.

[0251] 27 to 29 , FIG27 is a top view of the battery 100 shown in FIG24 ; FIG28 is a cross-sectional view of the structure along line FF in FIG24 ; and FIG29 is a partially enlarged view of the structure shown in FIG28 . A reinforcement member 3143 is provided within the heat exchange tube 314 .

[0252] In the above technical solution, by arranging a reinforcement 3143 in the heat exchange tube 314, the deformation resistance of the heat exchange tube 314 can be improved, so that the heat exchange tube 314 can be fully in contact with the battery cell assembly 101, thereby improving the heat exchange efficiency and further improving the reliability of the battery 100.

[0253] Referring to FIG. 29 again, the reinforcement member 3143 includes a plurality of reinforcement ribs 3144 , which are arranged at intervals in the second direction. Each reinforcement rib 3144 is supported between two walls of the heat exchange tube 314 that are oppositely disposed in the thickness direction thereof.

[0254] The second direction here is the width direction of the heat exchange tube 314, and multiple reinforcing ribs 3144 are arranged at intervals in the width direction of the heat exchange tube 314. One side of each reinforcing rib 3144 abuts against one side of the heat exchange tube 314 in the thickness direction, and the other side of each reinforcing rib 3144 abuts against the other side of the heat exchange tube 314 in the thickness direction, thereby utilizing multiple reinforcing ribs 3144 to support the two walls arranged opposite to each other in the thickness direction of the heat exchange tube 314.

[0255] The reinforcing ribs 3144 may extend along the thickness direction of the heat exchange tube 314 , that is, the reinforcing ribs 3144 may be perpendicular to two oppositely disposed walls of the heat exchange tube 314 in the thickness direction. Of course, the reinforcing ribs 3144 may also extend obliquely relative to the thickness direction of the heat exchange tube 314 .

[0256] In the above technical solution, by setting the reinforcement 3143 to include multiple reinforcement ribs 3144, the deformation resistance of the heat exchange component in the third direction perpendicular to the second direction can be improved. On the one hand, the structural strength of the heat exchange tube 314 can be improved, and the reliability of the heat exchange component can be improved, thereby improving the reliability of the battery 100. On the other hand, the heat exchange tube 314 can be fully contacted with the battery cell assembly 101, thereby improving the heat exchange efficiency and further improving the reliability of the battery 100.

[0257] Please refer again to Figures 24-26 and further to Figure 30, which is a cross-sectional view of the structure along line GG in Figure 24. The heat exchange body 312 also includes a fixing member 3145, which is disposed between two adjacent heat exchange tubes 314. The heat exchange body 312 is connected to the housing 21 via the fixing member 3145.

[0258] Specifically, there are multiple fixing parts 3145, and a fixing part 3145 is provided between the two ends of any two adjacent heat exchange tubes 314. In the embodiment where each heat exchange tube 314 includes a first tube segment 3141 and two second tube segments 3142, a fixing part 3145 is provided between one second tube segment 3142 of any two adjacent heat exchange tubes 314, and a fixing part 3145 is provided between the other second tube segments 3142 of any two adjacent heat exchange tubes 314. Multiple fixing parts 3145 are fixed in the box body 21, and multiple heat exchange tubes 314 can be fixed in the box body 21, thereby improving the installation stability and reliability of the heat exchange body 312 in the first direction and the second direction.

[0259] In the above technical solution, by providing the fixing member 3145 , the heat exchange body 312 can be fixed in the box body 21 , thereby improving the installation stability and reliability of the heat exchange body 312 , and further improving the reliability of the battery 100 .

[0260] Please refer to Figures 27 and 30 again. A first fixed beam 51 and a second fixed beam 52 are provided in the box body 21. The first fixed beam 51 and the second fixed beam 52 are arranged at intervals in the first direction, and the length directions of the first fixed beam 51 and the second fixed beam 52 extend along the second direction. The battery cell assembly 101 is located between the first fixed beam 51 and the second fixed beam 52.

[0261] By providing the first fixing beam 51 and the second fixing beam 52 , the structure of the box body 21 can be reinforced, which is beneficial to improving the structural strength of the box body 21 and thus improving the reliability of the battery 100 .

[0262] The fixing member 3145 is connected to the box body 21 via the first fixing beam 51 or the second fixing beam 52 .

[0263] Specifically, in order not to destroy the sealing of the box body 21, the first fixed beam 51 and the second fixed beam 52 can be welded to the inner side of the surrounding wall 212 of the box body 21, and the fixing piece 3145 located between one end of any two heat exchange tubes 314 can be connected to the first fixed beam 51 through the third fastener 69, and the fixing piece 3145 located between the other ends of any two heat exchange tubes 314 can be connected to the second fixed beam 52 through the third fastener 69.

[0264] In the above technical solution, by setting the first fixed beam 51 and the second fixed beam 52, on the one hand, the structural strength of the box body 21 can be improved, thereby improving the reliability of the battery 100, and on the other hand, the fixing part 3145 of the heat exchange body 312 can be fixed to the first fixed beam 51 or the second fixed beam 52, thereby fixing the heat exchange body 312 in the box body 21. Without destroying the structure of the box body 21, the installation stability and reliability of the first heat exchange part 31 in the box body 21 can be improved, thereby further improving the reliability of the battery 100.

[0265] Please refer to Figures 21 to 23. The collector 315 includes a first collector 3157 and a second collector 3158. The first collector 3157 and the second collector 3158 are arranged at intervals in the first direction, and the length directions of the first collector 3157 and the second collector 3158 extend along the second direction. The two ends of each heat exchange tube 314 are respectively connected to the first collector 3157 and the second collector 3158.

[0266] When the first header 3157 is a liquid inlet pipe and the second header 3158 is a liquid discharge pipe, the heat exchange fluid can flow into the plurality of heat exchange tubes 314 through the first header 3157 and then flow out through the second header 3158 .

[0267] When the first header 3157 is a liquid discharge pipe and the second header 3158 is a liquid inlet pipe, the heat exchange fluid can enter the plurality of heat exchange tubes 314 through the second header 3158 and then flow out through the first header 3157 .

[0268] Since the multiple heat exchange tubes 314 are arranged in parallel, the temperatures of the multiple heat exchange tubes 314 are relatively uniform, which reduces the temperature difference between different parts of the battery cell assembly 101, is conducive to improving the heat exchange effect, and thus improves the reliability of the battery 100.

[0269] In the above technical solution, by setting the collector 315 to include a first collecting tube 3157 and a second collecting tube 3158, both ends of the multiple heat exchange tubes 314 are connected to the first collecting tube 3157 and the second collecting tube 3158, so that the multiple heat exchange tubes 314 are arranged in parallel, so that the temperatures of the multiple heat exchange tubes 314 are relatively uniform, which is conducive to improving the heat exchange effect, thereby improving the reliability of the battery 100.

[0270] In addition, the first current collector 315 and the second current collector 315 can be arranged at the top so that they can be arranged opposite to the surrounding wall 212 of the box body 21. Therefore, there is no need to open holes at the lower position of the expansion beam 60, and the sealing structure between the current collector 315 and the expansion beam 60 and the bottom wall 211 of the box body 21 is eliminated.

[0271] In some embodiments, the battery cell assembly 101 includes multiple battery cells 102, the battery cells 102 include multiple battery cells 10, and the multiple battery cells 10 of each battery cell 102 are arranged along a first direction, and the multiple battery cells 102 are arranged along a second direction, and the first direction and the second direction are arranged at an angle to each other.

[0272] For the battery cell assembly 101, the X direction in Figure 7 is the width direction of the battery cell assembly 101, and the Y direction is the length direction of the battery cell assembly 101. For the battery cell 10, the X direction in Figure 7 is the length direction of the battery cell 10, and the Y direction is the thickness direction of the battery cell 10. The battery cell assembly 101 includes a plurality of battery cells 102, and the plurality of battery cells 102 are arranged along the second direction, that is, the plurality of battery cells 102 are stacked in the thickness direction of the battery cell 10. Each battery cell 102 includes a plurality of battery cells 10, and the plurality of battery cells 10 of each battery cell 102 are arranged along the first direction, that is, the plurality of battery cells 10 of each battery cell 102 are stacked in the length direction of the battery cell 10.

[0273] Please refer to 9 again. An expansion beam 60 is provided in the box body 21. The expansion beam 60 includes a first expansion beam 61 and a second expansion beam 62. The first expansion beam 61 and the second expansion beam 62 are arranged at intervals in the second direction, and the length directions of the first expansion beam 61 and the second expansion beam 62 extend along the first direction. Each of the first expansion beam 61 and the second expansion beam 62 has a cavity 6301, and the battery cell assembly 101 is located between the first expansion beam 61 and the second expansion beam 62.

[0274] In the above technical solution, by setting the first expansion beam 61 and the second expansion beam 62, when the battery cell 10 of the battery cell assembly 101 has an expansion tendency, the first expansion beam 61 and the second expansion beam 62 abut against the battery cell assembly 101, and the deformation of the cavity 6301 of the first expansion beam 61 and the second expansion beam 62 is used to absorb and transmit the expansion force, thereby reducing the probability of the battery cell 10 being deformed due to the expansion force.

[0275] Referring again to Figures 9 and 11 , first and second fixing beams 51, 52 are provided within the housing 21. These beams are spaced apart in the first direction, and their lengths extend in the second direction. The battery cell assembly 101 is positioned between the first and second fixing beams 51, 52. The provision of the first and second fixing beams 51, 52 reinforces the structure of the housing 21, improving its strength and thereby enhancing the reliability of the battery 100.

[0276] Two ends of each of the first expansion beam 61 and the second expansion beam 62 are respectively connected to the first fixed beam 51 and the second fixed beam 52 via a first fastener 67 .

[0277] Specifically, the first expansion beam 61 and the second expansion beam 62 are arranged opposite to each other in the second direction, and the length directions of the first expansion beam 61 and the second expansion beam 62 both extend along the first direction. The first fixed beam 51 and the second fixed beam 52 are arranged opposite to each other in the first direction, and the length directions of the first fixed beam 51 and the second fixed beam 52 both extend along the second direction. The two ends of the first expansion beam 61 in the length direction are respectively connected to the first fixed beam 51 and the second fixed beam 52, so that the first expansion beam 61 is fixed in the box body 21 through the first fixed beam 51 and the second fixed beam 52. The two ends of the second expansion beam 62 in the length direction are respectively connected to the first fixed beam 51 and the second fixed beam 52, so that the second expansion beam 62 is fixed in the box body 21 through the first fixed beam 51 and the second fixed beam 52. The first expansion beam 61 and the second expansion beam 62, the first fixed beam 51 and the second fixed beam 52 are combined to form a square frame, which can define an installation space for accommodating the battery cell assembly 101.

[0278] More specifically, the first fixed beam 51 and the second fixed beam 52 are respectively welded to two oppositely disposed side walls of the surrounding wall 212 of the box body 21. For example, two connecting pieces disposed oppositely in the second direction are respectively provided at both ends of the first expansion beam 61 and the second expansion beam 62. The connecting pieces can form an L-shaped structure, one end of which can be welded to the corresponding fixed beam and the other end can be connected to the corresponding expansion beam 60 via a first fastener 67 (e.g., a rivet).

[0279] In the above technical solution, by setting the first fixed beam 51 and the second fixed beam 52, on the one hand, the structural strength of the box body 21 can be improved, thereby improving the reliability of the battery 100, and on the other hand, each of the first expansion beam 61 and the second expansion beam 62 can be fixed between the first fixed beam 51 and the second fixed beam 52, thereby fixing the first expansion beam 61 and the second expansion beam 62 in the box body 21. Without destroying the structure of the box body 21, the installation stability and reliability of the first expansion beam 61 and the second expansion beam 62 in the box body 21 can be improved, thereby further improving the reliability of the battery 100.

[0280] Please refer to FIG. 4 and FIG. 5 again. At least one of the first expansion beam 61 and the second expansion beam 62 has an avoidance hole 6302 . The avoidance hole 6302 is used to avoid the current collector 315 and / or the heat exchange body 312 .

[0281] In the above technical solution, by setting an avoidance hole 6302 on the first expansion beam 61 and / or the second expansion beam 62, the interference of the first expansion beam 61 and / or the second expansion beam 62 on the installation of the first heat exchanger 31 can be reduced without affecting the function of the first expansion beam 61 and / or the second expansion beam 62 to absorb and transmit the expansion force, and it is also convenient to connect the collector 315 of the first heat exchanger 31 with the water nozzle on the box body 21.

[0282] Please refer to Figures 4 and 5, 9 and 10 again. At least one of the first expansion beam 61 and the second expansion beam 62 includes a support beam 64 and an expansion beam body 65. The support beam 64 extends along the first direction and is fixedly connected to the bottom wall 211 of the box body 21. The support beam 64 defines an avoidance hole 6302. The expansion beam body 65 extends along the first direction and is connected to the support beam 64. The expansion beam body 65 defines a cavity 6301.

[0283] Among them, the support beam 64 can be welded to the box body 21, the expansion beam body 65 and the support beam 64 can be connected by a second fastener 68, and the two ends of the expansion beam body 65 in the length direction can be connected to the above-mentioned first fixed beam 51 and second fixed beam 52.

[0284] In the above technical solution, by setting the first expansion beam 61 and / or the second expansion beam 62 to include a support beam 64 and an expansion beam body 65, the support beam 64 can provide an installation position for the expansion beam 60 without destroying the structure of the box body 21, which is conducive to improving the bottom sealing of the box body 21. When the battery cell 10 of the battery cell assembly 101 has an expansion tendency, the expansion beam body 65 abuts against the battery cell assembly 101, and uses the deformation of the cavity 6301 of the expansion beam body 65 to absorb and transmit the expansion force, thereby reducing the probability of the battery cell 10 being deformed due to the expansion force.

[0285] Please refer to Figure 4 and Figure 5 again. The support beam 64 includes multiple support parts 641. The number of support parts 641 is at least two. The multiple support parts 641 are arranged at intervals along the first direction, and an avoidance hole 6302 is defined between two adjacent support parts 641. That is, the support beam 64 is a multi-section structure.

[0286] It should be noted that the number of support portions 641 can be selected as needed. For example, if the first heat exchange element 31 has one current collector 315, the number of support portions 641 can be two; for another example, if the first heat exchange element 31 has two current collectors 315, the number of support portions 641 can be two.

[0287] Specifically, during the assembly process, the support beam 64 can be first fixed in the box body 21, and then the box body 21 with the support beam 64 can be subjected to electrophoresis and other treatments. Thereafter, the first heat exchange component 31 can be installed from top to bottom in the box body 21 so that the support beam 64 can avoid the first heat exchange component 31. Then, the expansion beam body 65 is installed on the support beam 64 so that the expansion beam body 65 is stopped above the first heat exchange component 31. Finally, the battery cell assembly 101 is installed between the first expansion beam 61 and the second expansion beam 62.

[0288] In the above technical solution, the support beam 64 is set to the above structure, and the avoidance hole 6302 can be defined by using two adjacent support parts 641. On the one hand, there is no need to perform a hole drilling operation on the support beam 64, which simplifies the processing steps, helps to improve production efficiency and reduce costs. On the other hand, during the assembly process, the first heat exchange component 31 can be placed from top to bottom in the box body 21, and then the expansion beam body 65 can be installed, which can reduce the difficulty of installing the first heat exchange component 31, thereby further improving production efficiency and reducing costs.

[0289] Please refer to Figures 9 and 10 again. The expansion beam body 65 includes a main body 651 and a connecting portion 652. At least a portion of the main body 651 is arranged on the side of the multiple support portions 641 facing the battery cell assembly 101. The connecting portion 652 is connected to the side of the main body 651 away from the battery cell assembly 101. The connecting portion 652 is connected to the side of the multiple support portions 641 away from the bottom wall 211 of the box body 21. The main body 651 and the connecting portion 652 respectively cover at least part of the avoidance hole 6302.

[0290] In the above technical solution, the expansion beam body 65 is configured to include a main body 651 and a connecting portion 652. When the battery cell 10 of the battery cell assembly 101 has an expansion tendency, the main body 651 abuts against the battery cell assembly 101, and the deformation of the cavity 6301 of the main body 651 is used to absorb and transmit the expansion force, thereby reducing the probability of the battery cell 10 being deformed due to the expansion force. By providing the connecting portion 652, the main body 651 can be connected to the support beam 64, thereby realizing the installation of the expansion beam body 65.

[0291] In addition, by covering at least part of the avoidance hole 6302 through the main body 651 and the connecting part 652, on the one hand, the influence of setting the avoidance hole 6302 on the structural strength of the first expansion beam 61 or the second expansion beam 62 can be reduced, and on the other hand, the contact area between the first expansion beam 61 or the second expansion beam 62 and the battery cell assembly 101 can be increased, thereby improving the absorption and transmission of expansion force by the first expansion beam 61 or the second expansion beam 62, thereby improving the reliability of the battery 100.

[0292] Optionally, the support beam 64 is connected to the bottom wall 211 of the box body 21 by welding, and the expansion beam body 65 is connected to the side of the support beam 64 facing away from the bottom wall 211 of the box body 21 through a second fastener 68 .

[0293] Specifically, the middle part of the support beam 64 in the width direction is arched upward, and the two sides of the support beam 64 in the width direction are respectively welded to the bottom wall 211 of the box body 21, so that a chamber is defined between the support beam 64 and the bottom wall 211 of the box body 21. The expansion beam body 65 can be connected to the middle part of the support beam 64 in the width direction through the second fastener 68, and the chamber formed between the support beam 64 and the bottom wall 211 of the box body 21 can accommodate the second fastener 68.

[0294] In the above technical solution, by connecting the expansion beam body 65 and the support beam 64 through the second fastener 68, the assembly and disassembly operations of the expansion beam body 65 and the support beam 64 are simplified, which is beneficial to improving the production efficiency of the battery 100 and facilitating the maintenance and replacement of components.

[0295] Referring again to Figure 10, the expansion beam body 65 is manufactured using an extrusion process to define the cavity 6301. Using an extrusion process to manufacture the expansion beam body 65 allows for complex cross-sections to be formed as required by the design, thereby reducing the number of components of the expansion beam body 65 and eliminating the need for assembly steps for the multiple components of the expansion beam body 65. This makes installation of the expansion beam body 65 more convenient, thereby improving production efficiency.

[0296] Please refer to Figures 28 and 29 again. At least one of the first expansion beam 61 and the second expansion beam 62 includes a plurality of plates 66. The plurality of plates 66 are stacked and connected along the second direction. The plates 66 extend along the first direction. A cavity 6301 is defined between at least two plates 66. The avoidance hole 6302 runs through the plurality of plates 66.

[0297] That is, the plurality of plates 66 can be formed separately, and after being formed, the plurality of plates 66 can be connected together by mechanical connection, so as to be assembled to form the first expansion beam 61 or the second expansion beam 62 .

[0298] During the molding process, avoidance holes 6302 can be pre-processed on the multiple plates 66. During the assembly process, the avoidance holes 6302 of the multiple plates 66 are aligned to form a first expansion beam 61 or a second expansion beam 62 with avoidance holes 6302. Of course, the multiple plates 66 can also be connected together first and then the avoidance holes 6302 can be processed.

[0299] In the above technical solution, by using a plurality of independently formed plates 66 to form the first expansion beam 61 or the second expansion beam 62 , the processing difficulty of each component can be reduced, thereby reducing production costs and improving production efficiency.

[0300] Referring again to Figure 29 , the plate 66 is formed using a stamping process. Multiple plates 66 can be formed using this process to form different structures as needed. This simplifies the molding process, reduces processing difficulty, and helps lower production costs. Assembling multiple plates 66 defines a cavity 6301, which can then be used to absorb and transmit expansion forces through deformation, reducing the probability of deformation of the battery cell 10 due to expansion forces.

[0301] Specifically, as shown in Figure 29, multiple plate bodies 66 include an outer support plate 661, an inner support plate 662 and a reinforcing plate 663. The outer support plate 661 and the inner support plate 662 are arranged relative to each other in the second direction, and the lower end of the outer support plate 661 and the lower end of the inner support plate 662 are both connected to the bottom wall 211 of the box body 21, the upper end of the outer support plate 661 and the upper end of the inner support plate 662 are connected, and the reinforcing plate 663 is arranged between the outer support plate 661 and the inner support plate 662. The reinforcing plate 663 can form a multi-bend plate body 66, and the reinforcing plate 663 is connected to the outer support plate 661 and the inner support plate 662, so as to define multiple cavities 6301.

[0302] More specifically, the lower end of the outer support plate 661 and the lower end of the inner support plate 662 can be welded to the bottom wall 211 of the box body 21, the upper end of the outer support plate 661 and the upper end of the inner support plate 662 are welded, and the reinforcing plate 663 is arranged between the outer support plate 661 and the inner support plate 662, and the reinforcing plate 663 can be welded to the outer support plate 661 and the inner support plate 662.

[0303] 4 , 5 and 13 again, along the second direction, the current collector 315 is connected to one side of the heat exchange body 312 , and the avoidance hole 6302 is provided on the side of the first expansion beam 61 or the second expansion beam 62 facing the bottom wall 211 of the box body 21 .

[0304] In the above technical solution, the avoidance hole 6302 is arranged on the side of the first expansion beam 61 or the second expansion beam 62 facing the bottom wall 211 of the box body 21, so that the collector 315 or the heat exchange body 312 does not need to be bent upward or does not need to be bent upward too much, which can simplify the structure of the collector 315 or the heat exchange body 312. In addition, with such an arrangement, the first expansion beam 61 or the second expansion beam 62 can be stopped above the collector 315 or the heat exchange body 312, thereby further limiting the first heat exchange component 31 and improving the installation reliability of the first heat exchange component 31.

[0305] Please refer to Figures 23 to 25 again. The collector 315 includes a first collecting tube 3157 and a second collecting tube 3158. The first collecting tube 3157 and the second collecting tube 3158 are arranged at intervals in the first direction, and the length directions of the first collecting tube 3157 and the second collecting tube 3158 extend along the second direction. The avoidance hole 6302 is provided on the side of the first expansion beam 61 or the second expansion beam 62 facing away from the bottom wall 211 of the box body 21. For example, the avoidance hole 6302 can be provided at the top of both ends of the first expansion beam 61 or the second expansion beam 62.

[0306] In the above technical solution, by arranging the avoidance hole 6302 on the side of the first expansion beam 61 or the second expansion beam 62 facing away from the bottom wall 211 of the box body 21, the first current collector 315 and the second current collector 315 can be arranged close to the top, so that they can be arranged opposite to the surrounding wall 212 of the box body 21, thereby eliminating the sealing structure between the current collector 315 and the expansion beam 60 and the bottom wall 211 of the box body 21.

[0307] 28 and 29 , at least one of the first expansion beam 61 and the second expansion beam 62 is connected to a support member 71 on a side facing away from the battery cell assembly 101 , and the support member 71 is connected to the bottom wall 211 of the box body 21 or the surrounding wall 212 of the box body 21 .

[0308] For example, a support member 71 is provided on the side of the first expansion beam 61 facing away from the battery cell assembly 101 , and the support member 71 can be welded to the first expansion beam 61 , the bottom wall 211 of the box body 21 , or the portion of the surrounding wall 212 opposite to the first expansion beam 61 .

[0309] For example, a support member 71 is provided on the side of the second expansion beam 62 facing away from the battery cell assembly 101 , and the support member 71 can be welded to the second expansion beam 62 , the bottom wall 211 of the box body 21 , or the portion of the surrounding wall 212 opposite to the second expansion beam 62 .

[0310] For example, each of the first expansion beam 61 and the second expansion beam 62 is provided with a support member 71 on the side facing away from the battery cell assembly 101, and the support member 71 can be welded to the corresponding expansion beam 60, the bottom wall 211 of the box body 21 or the part of the surrounding wall 212 opposite to the expansion beam 60.

[0311] Of course, the support member 71 and the box body 21 and the expansion beam 60 may also be connected in other ways, which may be selected according to actual conditions.

[0312] In the above technical solution, the support member 71 can be used to support the first expansion beam 61 or the second expansion beam 62, which can effectively improve the overall structural strength and rigidity of the first expansion beam 61 or the second expansion beam 62, reduce the probability of the first expansion beam 61 or the second expansion beam 62 tilting, and thus improve the reliability of the battery 100.

[0313] 9 to 12 again, the first expansion beam 61 is provided with a first mounting member 72 , the second expansion beam 62 is provided with a second mounting member 73 , and the battery 100 further includes a pull rope 75 , both ends of which are connected to the first mounting member 72 and the second mounting member 73 , respectively.

[0314] In the above technical solution, the pull rope 75 can be used to resist the pressure of the battery cell assembly 101 on the first expansion beam 61 and the second expansion beam 62, reducing the probability of the first expansion beam 61 and the second expansion beam 62 tilting relative to the up and down directions, thereby improving the reliability of the battery 100.

[0315] Among them, each of the first mounting member 72 and the second mounting member 73 includes a mounting portion 741 and a fixing portion 742. The mounting portion 741 of the first mounting member 72 can be fixed to the first expansion beam 61, and the fixing portion 742 of the first mounting member 72 is connected to the mounting portion 741 of the first mounting member 72, so that one end of the pull rope 75 can be fixed to the mounting portion 741 of the first mounting member 72. The mounting portion 741 of the second mounting member 73 can be fixed to the second expansion beam 62, and the fixing portion 742 of the second mounting member 73 is connected to the mounting portion 741 of the second mounting member 73, so that the other end of the pull rope 75 can be fixed to the mounting portion 741 of the second mounting member 73.

[0316] Specifically, the mounting portion 741 has an internal thread structure, the fixing portion 742 has an external bolt structure, the pull rope 75 is sleeved on the fixing portion 742, and the mounting portion 741 and the fixing portion 742 are connected through the internal thread structure and the external thread structure, so that the pull rope 75 can be fixed on the mounting portion 741, making the operation simpler.

[0317] In the above technical solution, by setting each of the first mounting member 72 and the second mounting member 73 into the above structure, the installation and removal of the pull rope 75 are facilitated.

[0318] Please refer to Figure 9. The number of the first mounting members 72, the second mounting members 73 and the pull ropes 75 are respectively multiple, and the multiple first mounting members 72 and the multiple second mounting members 73 are respectively arranged along the first direction, and the two ends of the multiple pull ropes 75 are respectively connected to the multiple first mounting members 72 and the multiple second mounting members 73 in a one-to-one correspondence, so that the multiple pull ropes 75 are arranged along the first direction, and each pull rope 75 extends along the second direction, that is, the multiple pull ropes 75 are arranged along the length direction of the first expansion beam 61 and the second expansion beam 62.

[0319] In the above technical solution, the first expansion beam 61 and the second expansion beam 62 are connected by multiple pull ropes 75, which can better resist the pressure of the battery cell assembly 101 on the first expansion beam 61 and the second expansion beam 62, and further reduce the probability of the first expansion beam 61 and the second expansion beam 62 tilting relative to the up and down directions and the first direction, thereby improving the reliability of the battery 100.

[0320] Please refer to Figures 31 and 32. Figure 31 is a schematic diagram of the assembly of a battery 100 according to yet another embodiment of the present application; Figure 32 is a schematic diagram of the structure of the battery cell 10 and the second heat exchange element 32 shown in Figure 31. The battery cell assembly 101 includes a plurality of battery cells 102, each of which includes a plurality of battery cells 10. The battery cells 10 in each battery cell 102 are arranged along a first direction, and the battery cells 102 are arranged along a second direction, with the first and second directions forming an angle with each other.

[0321] As shown in Figure 31, for the battery cell assembly 101, the X direction in Figure 31 is the width direction of the battery cell assembly 101, and the Y direction is the length direction of the battery cell assembly 101. For the battery cell 10, the X direction in Figure 31 is the length direction of the battery cell 10, and the Y direction is the thickness direction of the battery cell 10. The battery cell assembly 101 includes a plurality of battery cells 102, and the plurality of battery cells 102 are arranged along the second direction, that is, the plurality of battery cells 102 are stacked in the thickness direction of the battery cell 10. Each battery cell 102 includes a plurality of battery cells 10, and the plurality of battery cells 10 of each battery cell 102 are arranged along the first direction, that is, the plurality of battery cells 10 of each battery cell 102 are stacked in the length direction of the battery cell 10.

[0322] As shown in Figure 32, the first heat exchange assembly 30 further includes a second heat exchange member 32, which is disposed between two adjacent battery cells 102. In other words, the second heat exchange member 32 can be disposed in a position where the large surfaces of two adjacent battery cells 10 face each other, so that the large surfaces of the two adjacent battery cells 10 can both contact the second heat exchange member 32, thereby improving the heat exchange efficiency of the battery cells 10 and further enhancing the reliability of the battery 100.

[0323] Therefore, in the above technical solution, by setting the second heat exchange component 32, the contact area between the battery cell 10 and the heat exchange component can be increased, thereby increasing the contact area between the battery cell assembly 101 and the first heat exchange assembly 30, thereby greatly improving the heat exchange efficiency and improving the reliability of the battery 100.

[0324] Please refer to Figure 2 again and further to Figure 33, which is a diagram of the assembly of the battery 100 according to some other embodiments of the present application. The box assembly 20 further includes a box cover 22, which is connected to the top of the box body 21 and has a top wall.

[0325] The first heat exchange assembly 30 further includes a third heat exchange element 33 . The third heat exchange element 33 is at least partially located between the top wall of the box cover 22 and the battery cell assembly 101 .

[0326] In the above technical solution, by providing the third heat exchange component 33 , the contact area between the battery cell assembly 101 and the first heat exchange assembly 30 can be increased, thereby significantly improving the heat exchange efficiency and enhancing the reliability of the battery 100 .

[0327] Referring to FIG. 33 again, the battery 100 further includes a second heat exchange component 40 , which is attached to the outside of the box 21 .

[0328] In this technical solution, by placing the second heat exchange assembly 40 outside the housing 21, there is no need to consider insulation and corrosion protection between the heat exchange component and the battery cells 10 within the housing 21. This simplifies the insulation and corrosion protection design of the second heat exchange assembly 40, reduces processing difficulty and production costs, eliminates the short circuit problem between the battery cells 10 and the second heat exchange assembly 40, and improves the reliability of the battery 100.

[0329] Moreover, by placing the second heat exchange component 40 outside the box component 20, the second heat exchange component 40 will not occupy the space in the box 21, so that the capacity of the battery 100 will not be reduced due to the installation of the heat exchange component, thereby better ensuring the capacity of the battery 100.

[0330] In the embodiment where the inner surface of the bottom wall 211 of the housing 21 is provided with a receiving groove 213, the receiving groove 213 can be integrally formed during the stamping process of the housing 21, or can be separately machined after the housing 21 is stamped. During the machining of the receiving groove 213, a mounting groove 214 can be integrally formed on the outer surface of the bottom wall 211 of the housing 21, and the second heat exchange assembly 40 can be disposed in the mounting groove 214.

[0331] The installation groove 214 is provided. On the one hand, the second heat exchange component 40 can be positioned to reduce the risk of shaking of the second heat exchange component 40, and the installation stability and reliability of the second heat exchange component 40 can be improved, thereby improving the reliability of the battery 100. On the other hand, the connection area between the second heat exchange component 40 and the bottom wall 211 of the box body 21 can be increased, thereby improving the reliability of the second heat exchange component 40 fixed on the box body 21.

[0332] In addition, since the battery cell assembly 101 can contact the bottom wall 211 of the box body 21, the connection area between the second heat exchange assembly 40 and the bottom wall 211 of the box body 21 is increased, which can further improve the heat exchange efficiency and thus further enhance the reliability of the battery 100.

[0333] Please refer to 6 again. According to some embodiments of the present application, the battery 100 includes a box assembly 20, a cell assembly 101, a first heat exchange assembly 30, a first expansion beam 61, a second expansion beam 62, a connecting beam 53, a first fixed beam 51, a second fixed beam 52, a first mounting beam 81, a second mounting beam 82, and a bottom guard plate 90.

[0334] The box assembly 20 includes a box body 21 and a box cover 22 . The box body 21 is an integral stamped part having a bottom wall 211 and a surrounding wall 212 .

[0335] The first fixed beam 51 and the second fixed beam 52 are arranged opposite to each other in the first direction, and the length directions of the first fixed beam 51 and the second fixed beam 52 both extend along the second direction and are arranged opposite to the two oppositely arranged side walls of the surrounding wall 212 of the box body 21. The first expansion beam 61 and the second expansion beam 62 are arranged opposite to each other in the second direction, and the length directions of the first expansion beam 61 and the second expansion beam 62 both extend along the first direction. The two ends of the first expansion beam 61 in the length direction are respectively connected to one end of the first fixed beam 51 and one end of the second fixed beam 52, and the two ends of the second expansion beam 62 in the length direction are respectively connected to the other end of the first fixed beam 51 and the other end of the second fixed beam 52. A support member 71 is connected to the side of at least one of the first expansion beam 61 and the second expansion beam 62 facing away from the battery cell assembly 101, and the support member 71 is connected to the bottom wall 211 of the box body 21 or the surrounding wall 212 of the box body 21. The length direction of the connecting beam 53 extends along the first direction, and the two ends of the connecting beam 53 in the length direction are respectively connected to the middle part of the first fixed beam 51 and the middle part of the second fixed beam 52.

[0336] In this embodiment, the first expansion beam 61 includes a support beam 64 and an expansion beam body 65. The support beam 64 includes a plurality of support portions 641 arranged along a first direction. An avoidance hole 6302 is defined between two adjacent support portions 641. The expansion beam body 65 is made by an extrusion process, and the expansion beam body 65 is installed on the support beam 64.

[0337] The first heat exchange assembly 30 includes a first heat exchange element 31 , and the first heat exchange element 31 includes a heat exchange body 312 and a current collector 315 .

[0338] The heat exchange body 312 is arranged in the box body 21 and is located between the first expansion beam 61 and the second expansion beam 62. The heat exchange body 312 includes a plurality of heat exchange tubes 314. Each heat exchange tube 314 defines a heat exchange channel 310. The heat exchange channel 310 includes a first heat exchange part 3101 and a second heat exchange part 3104. The first heat exchange part 3101 includes a plurality of first heat exchange sections 3102 and a plurality of first bending sections 3103. The plurality of first heat exchange sections 3102 are arranged along the first direction and each first heat exchange section 3102 extends along the second direction. Two adjacent first heat exchange sections 3102 are connected by the first bending section 3103, so that the plurality of first heat exchange sections 3102 and the plurality of first bending sections 3103 are connected in sequence to form a multi-bending structure. The second heat exchange part 3104 is arranged on the periphery of the first heat exchange part 3101.

[0339] There are two current collectors 315 and they are arranged on one side of the heat exchange body 312. One of the current collectors 315 is connected to one end of the two heat exchange tubes 314, and the other current collector 315 is connected to the other end of the two heat exchange tubes 314. The two current collectors 315 pass through the two avoidance holes 6302 on the first expansion beam 61 respectively, so that the current collectors 315 can be connected to the water nozzle through the hose 316.

[0340] The battery cell assembly 101 is disposed within the housing 21 and above the first heat exchange element 31. The battery cell assembly 101 includes a plurality of battery cells 102 arranged along the second direction. Each battery cell 102 includes a plurality of battery cells 10, each of which is arranged along the first direction. The bottom of each battery cell 102 contacts at least two first heat exchange sections 3102.

[0341] The first mounting beam 81 and the second mounting beam 82 are arranged outside the box body 21 and are located on opposite sides of the box body 21. The first mounting beam 81 and the second mounting beam 82 are spaced apart in the first direction, and the length directions of the first mounting beam 81 and the second mounting beam 82 both extend along the second direction.

[0342] The bottom guard plate 90 is disposed outside the box body 21 and opposite to the bottom wall 211 of the box body 21 . Two opposite sides of the bottom guard plate 90 are connected to the first mounting beam 81 and the second mounting beam 82 respectively.

[0343] Referring again to FIG. 7 , according to other embodiments of the present application, the first heat exchange element 31 includes only one current collector 315 , and the current collector 315 has multiple first flow channel interfaces 3152 and multiple second flow channel interfaces 3153. The first inlets and outlets 3109a of the multiple heat exchange channels 310 are in one-to-one communication with the multiple first flow channel interfaces 3152, and the second inlets and outlets 3109b of the multiple heat exchange channels 310 are in one-to-one communication with the multiple second flow channel interfaces 3153. In this embodiment, the remaining structure of the battery 100 can be the same as the structure of the battery 100 shown in FIG. 6 .

[0344] Referring to FIG. 13 again, according to other embodiments of the present application, the heat exchange body 312 is a heat exchange plate 313 and includes a first plate portion 3131 and a second plate portion 3132 , and a plurality of heat exchange channels 310 are defined between the first plate portion 3131 and the second plate portion 3132 .

[0345] There are two current collectors 315 and they are arranged on one side of the heat exchange body 312, one of the current collectors 315 is connected to the first inlet and outlet 3109a of the multiple heat exchange channels 310, and the other current collector 315 is connected to the second inlet and outlet 3109b of the multiple heat exchange channels 310. The current collector 315 can pass through the two avoidance holes 6302 on the first expansion beam 61 so that the current collector 315 can be connected to the water nozzle through the hose 316.

[0346] Please refer to Figure 23 again. According to some other embodiments of the present application, the heat exchange body 312 includes a plurality of heat exchange tubes 314, and the plurality of heat exchange tubes 314 are arranged along the second direction. Each heat exchange tube 314 includes a first tube segment 3141 and two second tube segments 3142. The length direction of the first tube segment 3141 extends along the first direction, and the length direction of the second tube segment 3142 extends along the third direction. The lower ends of the two second tube segments 3142 are connected to both ends of the length direction of the first tube segment 3141.

[0347] The collector 315 includes a first collecting pipe 3157 and a second collecting pipe 3158, which are arranged opposite to each other in the first direction. The length directions of the first collecting pipe 3157 and the second collecting pipe 3158 extend along the second direction. One end of each of the multiple heat exchange tubes 314 is connected to the first collecting pipe 3157 and the other end is connected to the second collecting pipe 3158.

[0348] In this embodiment, the first expansion beam 61 includes a plurality of inner support plates 662, reinforcement plates 663, and outer support plates 661 arranged and connected along the second direction. The inner support plates 662, reinforcement plates 663, and outer support plates 661 are all manufactured using a stamping process. Avoidance holes 6302 are provided at the top of each end of the first expansion beam 62 to avoid the first and second manifolds 3157, 3158.

[0349] According to some embodiments of the present application, the present application further provides an electric device 1000 including the battery 100 described in the above solution, and the battery 100 is used to provide electrical energy to the electric device 1000.

[0350] The power-consuming device 1000 may be any of the aforementioned devices or systems using the battery 100 .

[0351] Since the battery 100 according to the present application has the above-mentioned technical effects, the electrical device 1000 according to the present application also has the above-mentioned technical effects, that is, by adopting the above-mentioned battery 100, the reliability of the electrical device 1000 can be improved, and the production efficiency of the electrical device 1000 can also be improved, and the cost can be reduced.

[0352] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, wherein: include: The box assembly comprises a box body, wherein the box body is an integral stamped part having a bottom wall and a surrounding wall; A battery cell assembly is disposed in the box assembly and fixedly connected to the bottom wall of the box; The first heat exchange component is arranged in the box component and exchanges heat with the battery core component.

2. The battery according to claim 1, wherein The first heat exchange assembly includes a first heat exchange element, and the first heat exchange element includes: A heat exchange body, the heat exchange body being at least partially disposed between the bottom wall of the box and the battery core assembly, the heat exchange body having a heat exchange flow channel; The current collector is communicated with the heat exchange channel.

3. The battery according to claim 2, wherein The inner surface of the bottom wall of the box body is provided with an accommodating groove, and the heat exchange body is at least partially arranged in the accommodating groove.

4. The battery according to claim 3, wherein The heat exchange channel includes a first heat exchange part, the first heat exchange part includes a plurality of first heat exchange segments arranged at intervals, the accommodating groove includes a plurality of first groove segments arranged at intervals, and the plurality of first heat exchange segments are arranged in the plurality of first groove segments in a one-to-one correspondence.

5. The battery according to claim 4, wherein The battery cell assembly includes a plurality of battery cells, each of which includes a plurality of battery cells, and the plurality of battery cells of each battery cell are arranged along a first direction, and the plurality of battery cells are arranged along a second direction, wherein the first direction and the second direction are arranged at an angle to each other; Among them, a plurality of first heat exchange sections are arranged at intervals along the first direction and each first heat exchange section extends along the second direction, and a plurality of first trough sections are arranged at intervals along the first direction and each first trough section extends along the second direction.

6. The battery according to claim 5, wherein The first heat exchange portion further includes a first bending section, which is arc-shaped and bent and connected between two adjacent first heat exchange sections; The accommodating groove further includes a connecting groove section, which is arc-shaped and bent and connected between two adjacent first groove sections. The first bending section is provided in the connecting groove section.

7. The battery according to claim 5 or 6, wherein The heat exchange channel further includes a second heat exchange portion, the second heat exchange portion is bent to form a U-shaped area, one end of the first heat exchange portion is bent and connected to one end of the second heat exchange portion, and the first heat exchange portion is bent and disposed in the U-shaped area, and the first heat exchange portion and the second heat exchange portion are bent in the same plane; The accommodating groove also includes a second groove section, one end of the second groove section is bent and connected to one end of the first groove section, the shape of the second groove section is the same as the shape of the second heat exchange part, and the second heat exchange part is provided in the second groove section.

8. The battery according to claim 6 or 7, wherein The number of the heat exchange channel is one.

9. The battery according to claim 6 or 7, wherein There are multiple heat exchange channels, and the multiple heat exchange channels are arranged in parallel and their projections on the bottom wall of the box body do not overlap.

10. The battery according to any one of claims 3 to 9, wherein The heat exchange body includes a flat tube and the flat tube defines the heat exchange flow channel. The flat tube is arranged in the accommodating groove and two walls of the flat tube arranged opposite to each other in the thickness direction are respectively fixedly connected to the battery core assembly and the bottom wall of the box assembly.

11. The battery according to any one of claims 3 to 9, wherein The heat exchange body includes a heat exchange plate, and the heat exchange plate includes: first plate portion; a second plate portion, the second plate portion being arranged to cover one side of the first plate portion in a thickness direction, the heat exchange channel being defined between the second plate portion and the first plate portion; The first plate portion is fixedly connected to the battery cell assembly, the second plate portion is fixedly connected to the bottom wall of the box assembly, the second plate portion has a convex portion, and the convex portion is arranged in the accommodating groove.

12. The battery according to any one of claims 2 to 11, wherein The current collector comprises: pipe body; a first flow channel interface, the first flow channel interface being connected to a first inlet and outlet of the heat exchange flow channel; a second flow channel interface, the second flow channel interface being connected to a second inlet and outlet of the heat exchange flow channel; A partition structure is provided inside the pipe body, and the partition structure separates the first flow channel interface and the second flow channel interface inside the pipe body.

13. The battery according to claim 12, wherein The number of the heat exchange channel, the first channel interface and the second channel interface is respectively multiple; Among them, the first flow channel interfaces correspond to and are connected to the first inlets and outlets of the heat exchange flow channels one by one, and the first inlets and outlets of the heat exchange flow channels correspond to and are connected to the first inlets and outlets of the heat exchange flow channels one by one. The second flow channel interfaces correspond to and are connected to the second inlets and outlets of the plurality of heat exchange flow channels one by one.

14. The battery according to claim 13, wherein The plurality of first flow channel interfaces are connected inside the pipe body; and / or the plurality of second flow channel interfaces are connected inside the pipe body.

15. The battery according to any one of claims 2 to 11, wherein There are multiple heat exchange channels, and the collectors include two, one of which has multiple liquid inlet interfaces and the multiple liquid inlet interfaces correspond one-to-one to and are connected with the first inlets and outlets of the multiple heat exchange channels, and the other collector has multiple liquid discharge interfaces and the multiple liquid discharge interfaces correspond one-to-one to and are connected with the second inlets and outlets of the multiple heat exchange channels.

16. The battery according to claim 4, wherein The battery cell assembly includes a plurality of battery cells, each of which includes a plurality of battery cells, and the plurality of battery cells of each battery cell are arranged along a first direction, and the plurality of battery cells are arranged along a second direction, wherein the first direction and the second direction are arranged at an angle to each other; Among them, a plurality of first heat exchange sections are arranged at intervals along the second direction and each first heat exchange section extends along the first direction, and a plurality of first trough sections are arranged at intervals along the second direction and each first trough section extends along the first direction.

17. The battery according to claim 16, wherein The heat exchange body includes a plurality of heat exchange tubes, and the plurality of heat exchange tubes are arranged at intervals along the second direction, and each of the heat exchange tubes defines the first heat exchange section.

18. The battery according to claim 17, wherein Each of the heat exchange tubes comprises: a first pipe section, the first pipe section extending along the first direction and defining the first heat exchange section; Two second pipe segments, both of which extend along the third direction, one end of the two first pipe segments is respectively connected to the two ends of the first pipe segment and the other ends are both connected to the current collector.

19. The battery according to claim 17 or 18, wherein The heat exchange tube is a flat tube.

20. The battery according to claim 19, wherein A reinforcement piece is provided inside the heat exchange tube.

21. The battery according to claim 20, wherein The reinforcement member includes a plurality of reinforcement ribs, which are arranged at intervals in the second direction, and each of the reinforcement ribs is supported between two walls of the heat exchange tube that are arranged opposite to each other in the thickness direction of the heat exchange tube.

22. The battery according to any one of claims 17 to 21, wherein The heat exchange body further includes a fixing member, which is arranged between two adjacent heat exchange tubes, and the heat exchange body is connected to the box body through the fixing member.

23. The battery according to claim 22, wherein A first fixing beam and a second fixing beam are provided in the box body, the first fixing beam and the second fixing beam are arranged at intervals in the first direction and their length directions extend along the second direction, and the battery cell assembly is located between the first fixing beam and the second fixing beam; Wherein, the fixing member is connected to the box body through the first fixing beam or the second fixing beam.

24. The battery according to any one of claims 17 to 23, wherein The current collector comprises: The first header and the second header are arranged at intervals in the first direction and their length directions extend along the second direction, and both ends of each heat exchange tube are connected to the first header and the second header respectively.

25. The battery according to claim 2, wherein The battery cell assembly includes a plurality of battery cells, each of which includes a plurality of battery cells, and the plurality of battery cells of each battery cell are arranged along a first direction, and the plurality of battery cells are arranged along a second direction, wherein the first direction and the second direction are arranged at an angle to each other; An expansion beam is provided in the box body, and the expansion beam includes a first expansion beam and a second expansion beam. The first expansion beam and the second expansion beam are arranged at intervals in the second direction and their length directions extend along the first direction. Each of the first expansion beam and the second expansion beam has a cavity therein, and the battery cell assembly is located between the first expansion beam and the second expansion beam.

26. The battery according to claim 25, wherein A first fixing beam and a second fixing beam are provided in the box body, the first fixing beam and the second fixing beam are arranged at intervals in the first direction and their length directions extend along the second direction, and the battery cell assembly is located between the first fixing beam and the second fixing beam; Wherein, both ends of each of the first expansion beam and the second expansion beam are respectively connected to the first fixed beam and the second fixed beam through a first fastener.

27. The battery according to claim 25 or 26, wherein At least one of the first expansion beam and the second expansion beam has an avoidance hole for avoiding the current collector and / or the heat exchange body.

28. The battery according to claim 27, wherein At least one of the first expansion beam and the second expansion beam comprises: a support beam extending along the first direction and fixedly connected to the bottom wall of the box, wherein the support beam defines the avoidance hole; An expansion beam body extends along the first direction and is connected to the support beam, and the expansion beam body defines the cavity.

29. The battery according to claim 28, wherein The support beam includes a plurality of support portions spaced apart along the first direction, and the avoidance hole is defined between two adjacent support portions.

30. The battery according to claim 29, wherein The expansion beam body comprises: a main body, at least a portion of which is disposed on a side of the plurality of support portions facing the battery core assembly; a connecting portion connected to a side of the main body facing away from the battery cell assembly, and connected to a side of the plurality of supporting portions facing away from the bottom wall of the box; Wherein, the main body and the connecting portion respectively cover at least a portion of the avoidance hole.

31. The battery according to any one of claims 28 to 30, wherein The support beam is connected to the bottom wall of the box body by welding, and the expansion beam body is connected to the side of the support beam facing away from the bottom wall of the box body by a second fastener.

32. The battery according to any one of claims 28 to 31, wherein The expansion beam body is manufactured by an extrusion process to define the cavity.

33. The battery according to claim 27, wherein At least one of the first expansion beam and the second expansion beam comprises: A plurality of plates are stacked and connected along the second direction, the plates extend along the first direction, the cavity is defined between at least two of the plates, and the avoidance hole runs through the plurality of plates.

34. The battery according to claim 33, wherein The plate body is made by a stamping process.

35. The battery according to claim 27, wherein Along the second direction, the current collector is connected to one side of the heat exchange body, and the avoidance hole is provided on a side of the first expansion beam or the second expansion beam facing the bottom wall of the box.

36. The battery according to claim 27, wherein The current collector comprises: The first collecting pipe and the second collecting pipe are arranged at intervals in the first direction and their length directions extend along the second direction. The avoidance hole is provided on the side of the first expansion beam or the second expansion beam facing away from the bottom wall of the box body.

37. The battery according to any one of claims 25 to 36, wherein A support member is connected to a side of at least one of the first expansion beam and the second expansion beam facing away from the battery core assembly, and the support member is connected to the bottom wall of the box or the surrounding wall of the box.

38. The battery according to any one of claims 25 to 37, wherein The first expansion beam is provided with a first mounting member, the second expansion beam is provided with a second mounting member, and the battery further includes a pull rope, both ends of which are connected to the first mounting member and the second mounting member respectively.

39. The battery according to claim 38, wherein There are multiple first mounting members, multiple second mounting members and multiple pull ropes, and the multiple first mounting members and multiple second mounting members are arranged along the first direction respectively. The two ends of the multiple pull ropes are connected to the multiple first mounting members and multiple second mounting members one by one.

40. The battery according to any one of claims 2 to 39, wherein The battery cell assembly includes a plurality of battery cells, each of which includes a plurality of battery cells, and the plurality of battery cells of each battery cell are arranged along a first direction, and the plurality of battery cells are arranged along a second direction, wherein the first direction and the second direction are arranged at an angle to each other; The first heat exchange assembly further includes a second heat exchange element, which is disposed between two adjacent battery cells.

41. The battery according to any one of claims 1 to 40, wherein The box assembly further includes a box cover, which is connected to the upper part of the box and has a top wall; The first heat exchange assembly further includes a third heat exchange member, which is at least partially located between the top wall of the box cover and the battery core assembly.

42. The battery according to any one of claims 1 to 41, wherein Also includes: The second heat exchange component is arranged outside the box body.

43. An electrical device, wherein: Comprising a battery according to any one of claims 1-42.

Images