Battery and electrical device

Abstract

A battery and an electrical device, which belong to the technical field of batteries. The battery comprises a case assembly, a battery cell assembly and a heat exchange assembly, wherein the case assembly comprises a case and a first expansion beam arranged in the case, the space in the case being divided into a first space and a second space by means of the first expansion beam; the battery cell assembly is arranged in the case and located in the first space, the end of the battery cell assembly abutting against the first expansion beam; and the heat exchange assembly is arranged on the case assembly and comprises a heat exchange member, a current collector and an adapter, the heat exchange member and the battery cell assembly being arranged to allow heat exchange, the heat exchange member being in communication with the current collector, and the adapter being in communication with the current collector. A clearance space is formed between the first expansion beam and the case or on the first expansion beam; the current collector and the adapter are both arranged in the case, and at least one of the current collector and the adapter is at least partially located in the clearance space.

Description

Batteries and electrical devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202410171696.8 and application date 2024-02-06, and claims the priority of the above-mentioned Chinese patent application. The entire content of the above-mentioned Chinese patent application is hereby introduced into this application as a reference. Technical Field

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

[0004] In recent years, new energy vehicles have made great strides in development. In the field of electric vehicles, batteries, as the power source of electric vehicles, play an irreplaceable and important role. However, the energy density of batteries needs to be further improved.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a battery and an electrical device, which are beneficial to improving the energy density of the battery.

[0007] In the first aspect, an embodiment of the present application provides a battery, comprising: a case assembly, a battery cell assembly and a heat exchange assembly, the case assembly comprising a case and a first expansion beam arranged in the case, the space in the case being divided into a first space and a second space by the first expansion beam; the battery cell assembly is arranged in the case and is located in the first space, and the end of the battery cell assembly abuts against the first expansion beam; the heat exchange assembly is arranged in the case assembly and comprises a heat exchange part, a current collector and a adapter, the heat exchange part is arranged for heat exchange with the battery cell assembly, the heat exchange part is connected to the current collector, and the adapter is connected to the current collector; wherein, an air avoidance space is formed between the first expansion beam and the case or on the first expansion beam, the current collector and the adapter are both arranged in the case and at least part of at least one of them is located in the air avoidance space.

[0008] In the above technical solution, on the one hand, by forming an air-avoidance space between the first expansion beam and the box body, or on the first expansion beam, to accommodate at least a portion of at least one of the current collector and the adapter, the occupation of the second space by the current collector and / or the adapter can be reduced, thereby saving space and facilitating the arrangement of the battery management system and / or the installation of the high-voltage box in the second space, thereby improving the utilization of the space; on the other hand, in view of the size optimization of the second space, the size of the first space can be relatively increased, thereby increasing the number of electrically connected battery cells in the first space, thereby further improving the space utilization and improving the volume energy density of the battery.

[0009] In some embodiments, the side surface of the first expansion beam facing the first space is the first surface, at least a portion of the current collector is located in the air-avoiding space, and the side surface of the current collector close to the first space is flush with the first surface, or is arranged close to the second space relative to the first surface.

[0010] In the above technical solution, by arranging that at least a portion of the current collector is located in the air-avoiding space and the first expansion beam does not protrude toward the first space, the arrangement of the current collector will not interfere with the contact between the battery cell assembly and the first expansion beam, thereby simplifying the design and saving costs.

[0011] In some embodiments, the side surface of the first expansion beam facing the second space is the second surface, at least a portion of the current collector is located in the air-avoiding space, and the side surface of the current collector close to the second space is flush with the second surface, or is arranged close to the first space relative to the second surface.

[0012] In the above technical solution, by arranging the current collector so that at least a portion of it is located within the avoidance space and does not protrude from the first expansion beam toward the second space, the current collector does not occupy the second space, thereby further improving space utilization. Furthermore, when the current collector neither protrudes from the first expansion beam toward the first space nor toward the second space, the current collector can more fully utilize the space within the first expansion beam, further improving space utilization and thereby increasing the volumetric energy density of the battery.

[0013] In some embodiments, the current collector is located in the air-avoiding space, one end of the adapter is located in the air-avoiding space and penetrates into the current collector to communicate with the current collector, and the other end of the adapter extends into the second space.

[0014] In the above technical solution, by setting the collector as a whole in the air-avoiding space, the occupation of the second space by the collector can be reduced, effectively improving the space utilization rate, and by setting one end of the adapter in the air-avoiding space to pass the collector through, not only can the occupation of the second space be further reduced, but also the connection method between the collector and the adapter can be simplified, which is convenient for assembly and saves parts, thereby improving the compactness of the fit between the components.

[0015] In some embodiments, the adapter is disposed through the first expansion beam so that the other end of the adapter extends into the second space.

[0016] In the above technical solution, by setting the adapter to pass through the first expansion beam, it is convenient for the end of the adapter to extend into the second space, reducing the difficulty of operation, improving assembly efficiency, and simplifying the design and processing difficulty of the box, without the need for special design and processing for passing the adapter.

[0017] In some embodiments, the avoidance space includes a first avoidance portion formed on the first expansion beam, and the first avoidance portion is open toward the first space.

[0018] In the above technical solution, by providing a first avoidance portion open toward the first space on the first expansion beam, it is convenient to extend the current collector from one side of the first space toward the second space into the first avoidance portion, which is beneficial to reducing the difficulty of installing the current collector into the avoidance space and improving assembly efficiency.

[0019] In some embodiments, the first avoiding portion is formed as a concave structure that is concave toward the second space.

[0020] In the above technical solution, by setting the first avoidance portion as a recessed structure, the structural strength of the first expansion beam at the location where the first avoidance portion is set can be improved, which is beneficial to protecting the current collector and / or adapter in the avoidance space, and the first avoidance portion is easy to process.

[0021] In some embodiments, the first expansion beam includes an outer beam plate and an inner beam plate. The inner beam plate is away from the second space relative to the outer beam plate and abuts against the battery cell assembly. The first avoidance portion includes a first recessed portion formed on the inner beam plate, and the first recessed portion is recessed toward the second space.

[0022] In the above technical solution, by configuring the first expansion beam to include an outer beam plate and an inner beam plate, the first expansion beam's support reliability for the battery cell assembly can be improved, and the cost and weight of the first expansion beam can be reduced. Furthermore, by machining a first recessed portion on the inner beam plate on the side of the first expansion beam closest to the battery cell assembly, the first recessed portion can be opened toward the first space. Furthermore, by locally machining the first recessed portion on the inner beam plate to accommodate the current collector and adapter, there is no need to reduce and raise the overall height of the inner beam plate to accommodate the current collector and adapter. As a result, the inner beam plate can maintain its original height, providing a relatively large support range and achieving a better contact effect with the battery cell assembly.

[0023] In some embodiments, the first expansion beam further includes a reinforcing plate supported between the beam outer plate and the beam inner plate, and the first avoidance portion further includes a second recessed portion formed on the reinforcing plate, the second recessed portion corresponding to the first recessed portion and recessed in a direction away from the first recessed portion.

[0024] In the above technical solution, by arranging a reinforcement plate between the outer plate and the inner plate of the beam, the structural strength of the first expansion beam can be improved, which is beneficial to improving the support effect on the battery cell assembly. In addition, by locally processing the second recessed portion of the reinforcement plate to avoid the current collector and the adapter, there is no need to reduce and move the overall height of the reinforcement plate upward to avoid the current collector and the adapter, so that the reinforcement plate can maintain its original height, have a relatively large support range, and achieve a better support effect on the battery cell assembly.

[0025] In some embodiments, an open area of ​​a side of the first recessed portion facing the first space is smaller than an open area of ​​a side of the second recessed portion close to the first space.

[0026] In the above technical solution, since the open area of ​​the first recessed portion facing the battery cell assembly is relatively small, it is beneficial to increase the contact range between the inner plate of the beam and the battery cell assembly, thereby improving the reliability of the battery, while the open area of ​​the second recessed portion facing the first recessed portion is relatively large, which is beneficial for the first recessed portion to extend into the second recessed portion, thereby reducing the difficulty of assembling the inner plate of the beam and the reinforcement plate, and improving the assembly efficiency of the first expansion beam.

[0027] In some embodiments, the current collector is located in the air-avoiding space, the adapter is in the form of a curved tube and one end is located in the air-avoiding space and passes through the top wall of the current collector, and the other end passes through the first expansion beam and extends into the second space. The top wall of the first recessed portion has an upper recess, which accommodates the adapter.

[0028] In the above technical solution, the adapter is provided in the form of a bent tube with one end located in the avoidance space and passing through the top wall of the current collector, and the other end passing through the first expansion beam and extending into the second space, thereby facilitating the improvement of assembly efficiency. Moreover, by providing an upper recess on the top wall of the first recess to avoid the adapter, the open area of ​​the first recess toward the side of the battery cell assembly can be further reduced, which is beneficial to increasing the abutment range between the inner plate of the beam and the battery cell assembly, thereby improving the reliability of the battery.

[0029] In some embodiments, the first expansion beam includes a beam outer plate and a beam inner plate arranged in sequence from the second space to the first space, and a reinforcement plate supported between the beam outer plate and the beam inner plate. A first through hole is provided on the beam inner plate, a second through hole is provided on the reinforcement plate, and a third through hole is provided on the beam outer plate. The first through hole, the second through hole and the third through hole correspond to each other and are used to pass through the adapter.

[0030] In the above technical solution, by arranging a first through hole on the inner plate of the beam, a second through hole on the reinforcement plate, and a third through hole on the outer plate of the beam, there is no need to reduce the height of any of the inner plate of the beam, the reinforcement plate and the outer plate of the beam and move it upward in order to avoid the adapter, so that the inner plate of the beam, the reinforcement plate and the outer plate of the beam can respectively maintain their original heights, have a relatively large support range, and achieve a better support effect on the battery cell assembly.

[0031] In some embodiments, a side surface of the first expansion beam facing the first space is a first surface, a filling piece is provided at the first avoidance portion, and an outer surface of the filling piece is flush with the first surface.

[0032] In the above technical solution, a filling piece is provided to fill the space in the open surface of the first avoidance portion that is not occupied by the heat exchange assembly, so that the filling piece can be used to support the corresponding position of the battery cell assembly at the missing position of the first expansion beam, thereby enhancing the overall support effect of the battery cell assembly and improving the reliability of the battery.

[0033] In some embodiments, the first avoidance portion is open on one side facing the bottom wall of the box.

[0034] In the above technical solution, by setting the first avoidance portion to be open toward the bottom wall of the box body, the processing of the first avoidance portion is facilitated, and the current collector and / or adapter are facilitated to extend into the first avoidance portion, thereby improving assembly efficiency.

[0035] In some embodiments, the first expansion beam is configured as a continuous beam that is continuous at the corresponding avoidance space.

[0036] In the above technical solution, since the first expansion beam is not in the form of a disconnected multi-segment beam, the structural reliability of the first expansion beam can be improved, which is beneficial for supporting the battery cell assembly and facilitates the processing and assembly of the first expansion beam.

[0037] In some embodiments, the first expansion beam includes a first beam, the first beam includes a plurality of beam segments spaced apart along a length direction of the first expansion beam, and the air avoidance space includes a gap between two adjacent beam segments.

[0038] In the above technical solution, by providing the first expansion beam with a plurality of beam sections, the gap between two adjacent beam sections is used to avoid the collector and / or adapter, which is conducive to flexible assembly of the heat exchange component.

[0039] In some embodiments, the first expansion beam further includes a second beam, which is disposed relative to the first beam and away from the second space, blocks the gap and abuts against the battery cell assembly.

[0040] In the above technical solution, by setting the first expansion beam to be a combination of a first beam and a second beam, while utilizing the first beam to meet the requirements of avoiding the current collector and / or the adapter, the first beam can also be utilized to support the second beam, and the second beam can be utilized to support the battery cell assembly, which is beneficial to improving the supporting effect of the first expansion beam on the battery cell assembly and improving the reliability of the battery.

[0041] In some embodiments, the second beam is an extruded hollow beam.

[0042] In the above technical solution, the second beam is easy to process and has good reliability, which is beneficial to improving the supporting effect of the first expansion beam on the battery cell assembly and improving the reliability of the battery.

[0043] In some embodiments, the air avoidance space includes a second avoidance portion, which is formed by a concave upper surface of the bottom wall. At least a portion of the second avoidance portion is located below the first expansion beam, and at least a portion of the current collector is embedded in the second avoidance portion.

[0044] In the above technical solution, since the second escape portion is in the form of a groove, it is beneficial to improve the sealing performance of the box body and reduce the difficulty of sealing the box body. In addition, when the escape space includes both the first escape portion formed on the first expansion beam and the second escape portion formed on the bottom wall of the box body, the volume of the escape space can be increased, which is more conducive to accommodating the current collector. Moreover, by providing the second escape portion on the bottom wall of the box body to accommodate at least part of the current collector, the size of the first escape portion can be relatively smaller, which is beneficial to reducing the open area of ​​the first recessed portion facing the battery cell assembly, and is beneficial to increasing the contact range between the beam inner plate and the battery cell assembly, thereby improving the reliability of the battery.

[0045] In some embodiments, the second avoidance portion includes a first slot section located below the first expansion beam, and a second slot section arranged in a second space away from the first slot section. In the direction from the first slot section to the second slot section, the size of the second slot section is larger than the size of the collector.

[0046] In the above technical solution, by setting the size of the second slot section to be larger than the size of the current collector, the second slot section can pre-accommodate the current collector, so that the current collector can be installed into the first slot section by just a simple action of pushing horizontally, thereby reducing the assembly difficulty and improving the assembly efficiency.

[0047] In some embodiments, the heat exchange element is located in the box body and between the bottom wall of the box body and the battery core assembly.

[0048] In the above technical solution, by placing the heat exchange element inside the casing, compared to placing the heat exchange element outside the casing, the heat exchange element can more fully exchange heat with the battery cell assembly, improving the temperature regulation efficiency of the battery cell assembly and reducing heat or cooling waste. Furthermore, placing the heat exchange element inside the casing facilitates connection with the current collector inside the casing, reducing the difficulty of sealing the casing and improving the sealing performance of the battery.

[0049] In some embodiments, the bottom surface of the current collector is lower than the bottom surface of the heat exchange element, and the end of the heat exchange element close to the second space is penetrated by a side wall of the current collector facing the first space.

[0050] In the above technical solution, the connection between the current collector and the heat exchanger is facilitated, and the assembly efficiency is improved. Moreover, if the upper surface of the bottom wall of the box body has a second avoidance portion formed by a concave depression, at least part of the current collector can be arranged in the second avoidance portion, which is conducive to reducing the lifting height of the current collector relative to the bottom wall, reducing the distance between the heat exchanger and the bottom wall, and reducing the occupation of the first space by the heat exchanger. Moreover, when the second avoidance portion includes a first slot section located below the first expansion beam, and a second slot section arranged away from the second space relative to the first slot section, and the size of the second slot section is larger than the size of the current collector in the direction from the first slot section to the second slot section, during assembly, the assembled heat exchanger and the current collector can be installed in place by pushing horizontally from the first space to the second space, without the need for other turning or tilting operations, thereby reducing the difficulty of assembly and improving assembly efficiency.

[0051] In some embodiments, the upper surface of the bottom wall has a concave groove, and the heat exchange element is embedded in the groove.

[0052] In the above technical solution, the space occupied by the heat exchange element in the box can be reduced, which is beneficial to increasing the capacity of the battery. It is also beneficial to improve the matching stability between the heat exchange element and the box, thereby improving the reliability of the heat exchange element in regulating the temperature of the battery core assembly.

[0053] In some embodiments, an upper surface of the bottom wall and an outer surface of the heat exchange element are both provided with an insulating layer, and insulating glue is filled between the bottom wall and the battery core assembly.

[0054] In the above technical solution, the insulation between the heat exchanger and the battery cell assembly can be improved, thereby improving the reliability of the battery. Moreover, by providing insulating glue, a stable connection between the battery cell assembly, the heat exchanger and the box body can be achieved, thereby improving the stability and reliability of the heat exchange between the heat exchanger and the battery cell assembly.

[0055] In some embodiments, the battery also includes: at least one of a first temperature regulating member, a second temperature regulating member and a third temperature regulating member, the first temperature regulating member is arranged inside the box assembly and on the top of the battery cell assembly; the second temperature regulating member is arranged between the large surfaces of adjacent battery cells in the battery cell assembly; the third temperature regulating member is arranged outside the box and below the bottom wall of the box.

[0056] In the above technical solution, the temperature regulating element can be set at a suitable location according to actual conditions to meet the temperature regulation requirements of the battery.

[0057] In some embodiments, the box assembly includes a bottom guard plate located below the box, and the heat exchange component is located outside the box and between the bottom wall of the box and the bottom guard plate.

[0058] In the above technical solution, by placing the heat exchanger outside the casing, there is no need to consider the insulation problem between the heat exchanger and the battery cells in the casing, thereby simplifying the insulation design of the heat exchanger, reducing the processing difficulty and production cost, solving the short circuit problem between the battery cells and the heat exchanger, and improving the reliability of the battery. Moreover, by placing the heat exchanger outside the casing, the heat exchanger does not occupy the space in the casing, so that the battery capacity will not be reduced due to the installation of the heat exchanger, and the battery capacity is better guaranteed. In addition, by arranging the heat exchanger below the bottom wall of the casing, the heat exchanger can exchange heat with the battery cell assembly in a larger range, improving the temperature control effect and temperature control efficiency of the battery cell assembly. Moreover, by arranging a bottom guard plate below the heat exchanger, the heat exchanger can be more reliably protected, reducing the risk of damage to the heat exchanger due to collision and bumping, and improving the working reliability of the heat exchanger.

[0059] In some embodiments, the heat exchange element is connected to the current collector via a connecting pipe that passes through the bottom wall.

[0060] In the above technical solution, the current collector is built into the box, the heat exchange component is placed outside the box, and a connecting pipe passing through the box is provided to connect the current collector and the heat exchange component, thereby facilitating the connection between the current collector and the heat exchange component and facilitating the installation of the current collector and the heat exchange component.

[0061] In some embodiments, the box assembly further includes: a seal, which is sealed between the bottom wall and the bottom guard plate and includes a peripheral portion arranged around the heat exchanger, and the inner ring area of ​​the connecting pipe corresponding to the peripheral portion passes through the bottom wall.

[0062] In the above technical solution, by positioning the connection tube through the bottom wall within the area surrounded by the outer peripheral portion, when the outer peripheral portion is sealed between the bottom wall and the bottom guard plate, muddy water, particulate matter, and the like outside the housing assembly are unlikely to pass through the outer peripheral portion into the area between the bottom wall and the bottom guard plate, and then flow to the location where the connection tube passes through the bottom wall and into the housing, thereby improving battery reliability. Furthermore, because the outer peripheral portion surrounds the heat exchange element, muddy water, particulate matter, and the like outside the housing assembly are unlikely to pass through the outer peripheral portion into the area between the bottom wall and the bottom guard plate, contaminating or corroding the heat exchange element between the bottom wall and the bottom guard plate, thereby improving the reliability and service life of the heat exchange element.

[0063] In some embodiments, a bottom glue layer is provided between the heat exchange element and the bottom wall and the bottom protective plate.

[0064] In the above technical solution, on the one hand, the stability of heat transfer between the heat exchange element and the bottom wall can be improved, and on the other hand, the protectiveness of the surfaces on both sides of the heat exchange element can be improved, thereby protecting the heat exchange element.

[0065] In some embodiments, the heat exchange element includes at least one bent and extended heat exchange tube, and the box assembly also includes: a foam element, which is arranged between the bottom wall and the bottom guard plate, and includes a first foaming portion arranged around the heat exchange element, and a second foaming portion arranged between adjacent tube sections of the same heat exchange tube or between adjacent heat exchange tubes.

[0066] In the above technical solution, the foam part can be used to fill the space between the bottom wall and the bottom guard plate where the heat exchange part is removed, that is, it is set complementary to the heat exchange part, so that the foam part can play a role in supporting the bottom wall and the bottom guard plate. When the protective plate is impacted by a collision, the foam part can buffer the impact force and reduce the force of the bottom guard plate impacting the heat exchange part or the box body, thereby protecting the heat exchange part and the battery core components in the box body. Moreover, the foam part can also fill the gap between the heat exchange tubes, and can play a role in supporting and limiting the position of the heat exchange tubes, so that the heat exchange tubes can be stably in the set position to play a stable temperature regulation role.

[0067] In some embodiments, the foam member is connected to the bottom guard plate, and the upper surface of the heat exchange member is higher than the upper surface of the foam member.

[0068] In the above technical solution, the surface of the heat exchange element facing the bottom wall is positioned closer to the bottom wall than the surface of the foam element facing the bottom wall. This reduces the difficulty of molding the foam element and facilitates controlling the uniformity of its thickness. This ensures that the foam element does not interfere with the heat transfer coordination between the heat exchange element and the bottom wall, thereby improving the stability and reliability of heat transfer between the heat exchange element and the bottom wall, which in turn improves the temperature regulation of the battery cell assembly and, consequently, the reliability of the battery.

[0069] In some embodiments, the battery further includes: at least one of a first temperature regulating member, a second temperature regulating member and a fourth temperature regulating member, the first temperature regulating member being arranged in the box assembly and on the top of the battery cell assembly; the second temperature regulating member being arranged between the large surfaces of adjacent battery cells in the battery cell assembly; and the fourth temperature regulating member being arranged in the box assembly and between the bottom wall and the battery cell assembly.

[0070] In the above technical solution, the temperature regulating element can be set at a suitable location according to actual conditions to meet the temperature regulation requirements of the battery.

[0071] In some embodiments, the box body is an integral stamped part and includes a bottom wall and a surrounding wall, and the heat exchange element is laid on the bottom wall.

[0072] In the above technical solution, by placing the heat exchange element on the bottom wall, the heat exchange area between the heat exchange element and the battery cell assembly can be increased, thereby improving the temperature control effect on the battery cell assembly. Moreover, because the bottom wall and the surrounding wall of the box are stamped and formed as a whole, there is no need to consider the sealing of the connection between the bottom wall and the surrounding wall, and the sealing effect can be guaranteed. This prevents muddy water from seeping into the box through the connection between the bottom wall and the surrounding wall and affecting the battery cell assembly inside the box, thereby improving battery reliability. Moreover, the box body formed as a whole does not need to be spliced, which can improve production efficiency.

[0073] In some embodiments, the heat exchange element includes a plurality of heat exchange channels arranged in parallel.

[0074] In the above technical solution, since the heat exchange element includes multiple heat exchange channels arranged in parallel, when the total length of the channels required by the heat exchange element is fixed, the length of each heat exchange channel can be relatively short, which is beneficial to improving the overall heat exchange efficiency of the heat exchange element and improving the temperature regulation effect of the heat exchange element on the battery cell assembly.

[0075] In some embodiments, there are two current collectors, namely a first current collector and a second current collector. The first end of each heat exchange channel converges and connects to the first current collector, and the second end of each heat exchange channel converges and connects to the second current collector.

[0076] In the above technical solution, by providing a first current collector and a second current collector, the first end of each heat exchange channel is converged and connected to the first current collector, and the second end of each heat exchange channel is converged and connected to the second current collector. In this way, one of the first and second current collectors can serve as a liquid inlet collector, and the other can serve as a liquid outlet collector. There is no need to provide two channels with opposite flow directions within each current collector, thereby simplifying the current collector structure and improving reliability. Furthermore, by converging the ends of multiple heat exchange channels to two corresponding current collectors, the number of current collectors can be reduced, reducing material costs.

[0077] In some embodiments, the current collector is one and includes a first flow channel interface and a second flow channel interface that are isolated from each other, there are multiple first flow channel interfaces and they are interconnected, there are multiple second flow channel interfaces and they are interconnected, the multiple second flow channel interfaces are respectively located on both sides of the multiple first flow channel interfaces, the first ends of the multiple heat exchange channels correspond one-to-one to and are connected to the multiple first flow channel interfaces, and the second ends of the multiple heat exchange channels correspond one-to-one to and are connected to the multiple second flow channel interfaces.

[0078] In the above technical solution, the number of current collectors can be reduced so that only one avoidance space can be opened and the position is concentrated, which is conducive to reducing the difficulty of sealing and assembly, improving production efficiency, and improving battery reliability.

[0079] In some embodiments, the heat exchange element includes at least one first heat exchange channel, the first heat exchange channel includes a first heat exchange section, a second heat exchange section and a third heat exchange section, the second heat exchange section is bent to form a first U-shaped area, the first heat exchange section is bent and arranged in the first U-shaped area, and is connected to the second heat exchange section through the third heat exchange section, and the second heat exchange section is located at the outermost side of the circumference of the first heat exchange channel.

[0080] In the above technical solution, the second heat exchange section is bent to form a first U-shaped area, and the first heat exchange section is bent and arranged in the first U-shaped area, and the second heat exchange section is arranged to be located at the outermost side of the circumference of the first heat exchange channel. When the heat exchange component of this embodiment is used to exchange heat with the battery cell assembly, at least part of the first U-shaped area formed by the outer second heat exchange section can be opposite to at least part of the battery cells on the outer periphery of the battery cell assembly, so that the second heat exchange section can exchange heat with at least part of the battery cells on the outer periphery of the battery cell assembly, and the first heat exchange section in the first U-shaped area is opposite to the internal battery cells, so that the heat exchange component 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 on the outer periphery of the battery cell assembly and the battery cells inside the battery cell assembly tend to be consistent, which is beneficial to improving the temperature difference of the battery cell assembly in different environments and improving the temperature uniformity of the battery, thereby improving the service life of the battery to a certain extent.

[0081] In some embodiments, the battery cell assembly includes multiple battery cells arranged along a first direction, each battery cell includes multiple battery cells stacked in sequence along a second direction, and at least a portion of the second heat exchange section exchanges heat with the multiple battery cells located at the outermost circumference of the battery cell assembly.

[0082] In the above technical solution, by coordinating the arrangement of the battery cells and the extended arrangement of the first heat exchange channel, and setting at least a part of the second heat exchange section to exchange heat with the peripheral battery cell group, the heat exchange efficiency of the peripheral battery cell group can be improved, and the temperature difference caused by the heat dissipation of the peripheral battery cells of the battery assembly being greater than the heat dissipation of the inner battery cells can be further balanced.

[0083] In some embodiments, the heat exchange element further includes at least one second heat exchange channel, and the second heat exchange channel and the first heat exchange channel are bent in the same plane, and the second heat exchange channel is bent in the first U-shaped region of the first heat exchange channel.

[0084] In the above technical solution, by setting at least one first heat exchange channel and at least one second heat exchange channel, and by coordinating the relative position relationship between the two, the arrangement of the heat exchange channels can be designed according to the cooling requirements of the battery, thereby further optimizing the temperature regulation effect of the battery cell assembly and improving the temperature uniformity of the battery.

[0085] In some embodiments, at least one second heat exchange channel is bent to form a second U-shaped region, and at least a portion of the first heat exchange section is disposed within the second U-shaped region of the second heat exchange channel.

[0086] In the above technical solution, a second U-shaped area is formed by setting at least one second heat exchange channel bend, and at least part of the first heat exchange section is set in the second U-shaped area of ​​the second heat exchange channel, which is beneficial to the coordinated cooperation of the first heat exchange channel and the second heat exchange channel to further improve the temperature uniformity of the battery.

[0087] In some embodiments, the heat exchange element includes at least one bent and extended heat exchange tube, each heat exchange tube defines a heat exchange channel, and the heat exchange tube is a flat tube structure.

[0088] In the above technical solution, the heat exchange element with a flat tube structure occupies a small space, which is beneficial to increasing the capacity of the battery and reducing the weight, volume and cost of the battery.

[0089] In a second aspect, an embodiment of the present application further provides an electrical device comprising a battery according to any of the above solutions.

[0090] In the above technical solution, since the manufacturability of the battery is improved, it is beneficial to improve the performance of the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0092] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0093] FIG2 is an exploded view of the structure of a battery provided in some embodiments of the present application;

[0094] FIG3 is a partial structural diagram of a battery provided in some embodiments of the present application;

[0095] FIG4 is a schematic orthographic projection diagram of a portion of the structure of the battery shown in FIG3 ;

[0096] FIG5 is a schematic diagram of a heat exchange assembly provided in some embodiments of the present application;

[0097] FIG6 is an enlarged view of the circled portion A in FIG5 ;

[0098] FIG7 is a partial structural diagram of a battery provided in some embodiments of the present application;

[0099] FIG8 is an enlarged view of the circled portion B in FIG7 ;

[0100] FIG9 is a cross-sectional view taken along line CC in FIG4 ;

[0101] FIG10 is a partial structural diagram of a battery provided in some embodiments of the present application;

[0102] FIG11 is an enlarged view of the circled portion D in FIG4 ;

[0103] FIG12 is a partial cross-sectional view of a battery provided in some embodiments of the present application;

[0104] FIG13 is a schematic diagram of the cooperation between the heat exchange assembly and the beam outer plate provided in some embodiments of the present application;

[0105] FIG14 is an enlarged view of the circled portion E in FIG13 ;

[0106] FIG15 is an exploded view of a first expansion beam provided in some embodiments of the present application;

[0107] FIG16 is an exploded view of the first expansion beam in FIG15 from another angle;

[0108] FIG17 is a partial structural diagram of a battery provided in some embodiments of the present application;

[0109] FIG18 is an enlarged view of the circled portion F in FIG17 ;

[0110] FIG19 is an orthographic projection diagram of a partial structure of a battery provided by some embodiments of the present application;

[0111] FIG20 is a cross-sectional view along line GG in FIG19;

[0112] FIG21 is a schematic orthographic projection of a portion of the battery structure shown in FIG19 ;

[0113] FIG22 is a partial cross-sectional view of a battery provided in some embodiments of the present application;

[0114] FIG23 is a partial cross-sectional view of batteries provided in some other embodiments of the present application;

[0115] FIG24 is an exploded view of a portion of a battery provided by some embodiments of the present application;

[0116] FIG25 is an exploded view of a portion of a battery provided by some embodiments of the present application;

[0117] FIG26 is a partial cross-sectional view of a battery provided in some embodiments of the present application;

[0118] FIG27 is a partial cross-sectional view of a battery provided in some other embodiments of the present application;

[0119] FIG28 is an exploded view of a heat exchange assembly provided in some embodiments of the present application;

[0120] FIG29 is a schematic diagram of the cooperation between a heat exchange element and a battery core assembly provided in some embodiments of the present application;

[0121] FIG30 is an exploded view of a current collector and an adapter provided in some embodiments of the present application;

[0122] FIG31 is a cross-sectional view of a current collector provided in some embodiments of the present application;

[0123] FIG32 is a schematic diagram of a heat exchange element provided in some embodiments of the present application;

[0124] FIG33 is a schematic diagram of a heat exchange component provided in some other embodiments of the present application.

[0125] Reference numerals: vehicle 1000; battery 100; controller 200; motor 300; box assembly 1; first direction X; second direction Y; third direction Z; avoidance space 10; box body 11; first space 111; second space 112; bottom wall 113; second avoidance portion 1131; first groove section 11311; second groove section 11312; sink 1132; surrounding wall 114; box cover 12; first expansion beam 13; first avoidance portion 131; first surface 132; second surface 133; beam inner plate 134; first concave portion Recessed portion 1341; upper recessed portion 13411; first through-hole 1342; beam outer plate 135; third through-hole 1352; reinforcing plate 136; second recessed portion 1361; second through-hole 1362; filling member 137; outer surface 1371 of the filling member; first beam 138; beam section 1381; gap 1382; second beam 139; second expansion beam 14; third expansion beam 15; bottom guard plate 16; first guard plate 161; second guard plate 162; foam member 17; first foam portion 171; second foam portion 172; Sealing member 18; peripheral portion 181; bottom adhesive layer 19; battery core assembly 2; battery cell 20; battery cell 21; end portion 22 of the battery cell; heat exchange assembly 3; heat exchange element 31; heat exchange channel 311; first end 311a; second end 311b; first heat exchange channel 3110; first heat exchange section 3111; second heat exchange section 3112; third heat exchange section 3113; first U-shaped region Z1; first section R1; second section R2; third section R3; fourth section R4; second heat exchange channel 3114; second U-shaped region Z2; heat exchange Tube 312; current collector 32; surface 1 321; surface 2 322; first current collector 32a; second current collector 32b; first flow channel interface 32c; second flow channel interface 32d; tube body 323; partition structure 324; sealing structure 325; first channel 3231; second channel 3232; adapter 33; insulating layer 34; insulating glue 35; connecting tube 36; first sealing member 37; second sealing member 38; adapter tube 4; first temperature regulating member 51; second temperature regulating member 52; third temperature regulating member 53; third temperature regulating member 54. DETAILED DESCRIPTION

[0126] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0127] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0128] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0129] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0130] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0131] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0132] The term "plurality" used in this application refers to two or more (including two).

[0133] In this application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application do not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this.

[0134] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. A battery generally includes a housing assembly for enclosing one or more battery cells or one or more battery modules. A battery module generally includes multiple battery cells. The housing assembly can reduce the impact of liquids or other foreign matter on the charging or discharging of the battery cells.

[0135] A battery cell consists of a housing, an electrode assembly, and an electrolyte. The housing houses the electrode and electrolyte, and contains one or more electrode assemblies. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. The electrode assembly can be a wound or stacked structure. The battery cell primarily operates by the movement of metal ions between the positive and negative electrode sheets.

[0136] A positive electrode sheet generally includes a positive current collector and a positive active material layer. The positive active material layer is directly or indirectly coated on the positive current collector. The uncoated positive current collector protrudes from the coated positive current collector, serving as the positive tab. For lithium-ion batteries, for example, the positive current collector can be made of aluminum, and the positive active material layer can be made of lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide.

[0137] A negative electrode sheet generally includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is directly or indirectly coated on the negative electrode current collector. The negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer, and the negative electrode current collector not coated with the negative electrode active material layer serves as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material layer can be made of carbon, silicon, or other materials.

[0138] To ensure high current flow without melting, multiple positive electrode tabs are stacked together to form the positive electrode tab, while multiple negative electrode tabs are stacked together to form the negative electrode tab. The housing is equipped with pole posts, with the positive electrode tab electrically connected to the positive pole post, and the negative electrode tab electrically connected to the negative pole post. The pole posts can be connected directly to the pole posts or indirectly via adapters.

[0139] The material of the isolation film is not limited, and can be, for example, polypropylene or polyethylene.

[0140] The battery in the related art is provided with a brazed cold plate and an expansion beam inside the box, and the two sides of the expansion beam are respectively a first space for installing battery cells and a second space for installing a battery management system and / or a high-voltage box. The collecting path connected to the brazed cold plate needs to pass through the bottom of the expansion beam to extend from the first space to the second space. In this way, the collecting path will occupy the space of the second space, affecting the installation of the battery management system and / or the high-voltage box, which is not conducive to the manufacture of the battery. In order to facilitate the installation of the battery management system and / or the high-voltage box, when increasing the second space, the space of the first space needs to be sacrificed, thereby reducing the first space's capacity to accommodate battery cells, resulting in a lower volume energy density of the battery.

[0141] To this end, some embodiments of the present application propose a battery. By setting an air-avoidance space between the expansion beam and the box body to accommodate at least part of the current collecting path, the occupation of the second space by the current collecting path can be reduced, thereby saving space for facilitating the arrangement of the battery management system and / or the installation of the high-voltage box, improving space utilization, and facilitating the manufacture of the battery. In view of the size optimization of the second space, the size of the first space can be relatively increased, thereby increasing the number of battery cells in the first space and improving the volume energy density of the battery.

[0142] The present invention provides an electric device that uses a battery as a power source. The electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0143] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device according to an embodiment of the present application.

[0144] Please refer to Figure 1, which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may 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 driving the vehicle 1000.

[0145] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0146] Please refer to Figure 2, which is an exploded view of a partial structure of a battery 100 provided in some embodiments of the present application. The battery 100 includes a box assembly 1 and a cell assembly 2. The box assembly 1 includes a box 11. The cell assembly 2 is arranged in the box 11. The cell assembly 2 includes a plurality of battery cells 21. The plurality of battery cells 21 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the plurality of battery cells 21 are both connected in series and in parallel. The plurality of battery cells 21 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the plurality of battery cells 21 is accommodated in the box assembly 1; of course, the plurality of battery cells 21 can also be first connected in series, in parallel, or in mixed connection to form a battery module, and the plurality of battery modules can then be connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the box assembly 1.

[0147] It is worth noting that the orientations or positional relationships indicated by terms such as "top," "bottom," "upper," and "lower" described herein are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. For example, in the embodiment shown in FIG2 , the housing assembly 1 includes a housing 11 and a lid 12 , with the lid 12 disposed on the top of the housing 11. In actual use, the battery 100 can be positioned upright with the lid 12 disposed on the top of the housing 11, or the battery 100 can be positioned inverted with the lid 12 disposed on the bottom of the housing 11.

[0148] 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 21. Each battery cell 21 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cells 21 may be cylindrical, flat, or rectangular.

[0149] Referring to Figures 2 and 3 , the box assembly 1 further includes a first expansion beam 13 disposed within the box 11. The space within the box 11 is divided by the first expansion beam 13 into a first space 111 and a second space 112. The battery cell assembly 2 is located in the first space 111, and the end 22 of the battery cell assembly 2 abuts the first expansion beam 13. The term "abut" in "the battery cell assembly 2 abuts the first expansion beam 13" should be understood broadly, meaning direct or indirect contact.

[0150] In the above technical solution, since the battery cell assembly 2 is arranged on the side of the first expansion beam 13 away from the second space 112, the second space 112 does not need to be equipped with a battery cell assembly 2, so that the second space 112 can be used as an installation space for installing a battery management system (BMS), a high-voltage box, etc.

[0151] It is worth noting that, in addition to the battery cell assembly 2, other components may also be provided in the first space 111. For example, in some examples, in conjunction with FIG2 , a second expansion beam 14 may be provided in the first space 111, and the battery cell assembly 2 may be sandwiched between the first expansion beam 13 and the second expansion beam 14. For another example, in other examples, in conjunction with FIG3 and FIG4 , a second expansion beam 14 and a third expansion beam 15 may be provided in the first space 111, and the third expansion beam 15 may be located between the first expansion beam 13 and the second expansion beam 14. The third expansion beam 15 divides the first space 111 into two spaces, each of which is provided with a plurality of battery cells 21, so that a portion of the battery cell assembly 2 is sandwiched between the first expansion beam 13 and the third expansion beam 15, and the rest of the battery cell assembly 2 is sandwiched between the third expansion beam 15 and the second expansion beam 14.

[0152] Please refer to Figures 2, 5 and 6. The battery 100 also includes a heat exchange component 3, which is arranged in the box component 1. The heat exchange component 3 includes a heat exchange part 31, a current collector 32 and an adapter 33. The heat exchange part 31 is arranged for heat exchange with the battery cell component 2. The heat exchange part 31 is connected to the current collector 32, and the adapter 33 is connected to the current collector 32.

[0153] For example, the fluid to be heat exchanged enters the current collector 32 through the adapter 33, and is then injected into the heat exchange element 31 through the current collector 32. The fluid to be heat exchanged flowing through the heat exchange element 31 exchanges heat with the battery cell assembly 2 through the heat exchange element 31, thereby regulating the temperature of the battery cell assembly 2. After heat exchange, the fluid is discharged from the heat exchange element 31 into the current collector 32, and then flows out through the adapter 33. The fluid to be heat exchanged can be in liquid or gas form. For simplicity, the following description uses the fluid flowing through the heat exchange assembly 3 as an example of heat exchange liquid.

[0154] 7-9 , an escape space 10 is formed between the first expansion beam 13 and the housing 11 or on the first expansion beam 13. The current collector 32 and the adapter 33 are both disposed within the housing 11, with at least a portion of at least one of them located within the escape space 10. For example, only at least a portion of the current collector 32 may be located within the escape space 10, or only at least a portion of the adapter 33 may be located within the escape space 10, or at least a portion of both the current collector 32 and the adapter 33 may be located within the escape space 10.

[0155] Among them, the avoidance space 10 can be defined solely by the first expansion beam 13, for example, the avoidance space 10 can be in a perforated form. Alternatively, the avoidance space 10 can also be defined by the box body 11 and the first expansion beam 13 and its position corresponds to the first expansion beam 13. For example, at least one of the box body 11 and the first expansion beam 13 has a avoidance portion (such as a groove structure or a notch structure, etc.), and the avoidance space 10 is formed by the avoidance portion. Exemplarily, when the avoidance space 10 is defined by the box body 11 and the first expansion beam 13, and the box body 11 includes a bottom wall 113 and a surrounding wall 114, the avoidance space 10 can be defined by the first expansion beam 13 and the bottom wall 113 of the box body 11, or by the first expansion beam 13 and the surrounding wall 114 of the box body 11, and can be defined according to the specific setting position of the collector 32.

[0156] In the above technical solution, by forming an air-avoidance space 10 between the first expansion beam 13 and the housing 11, or on the first expansion beam 13, to accommodate at least a portion of at least one of the current collector 32 and the adapter 33, the current collector 32 and / or the adapter 33 can reduce the occupation of the second space 112, thereby saving space and facilitating the installation of a battery management system (BMS) and / or a high-voltage box in the second space 112, thereby improving space utilization. Furthermore, due to the optimized size of the second space 112, the size of the first space 111 can be relatively increased, thereby increasing the number of battery cells 21 within the first space 111 and improving the volumetric energy density of the battery 100.

[0157] Referring to Figure 9, in some embodiments of the present application, the side surface of the first expansion beam 13 facing the first space is the first surface 132, at least a portion of the current collector 32 is located in the air-avoiding space 10, and the side surface of the current collector 32 close to the first space 111 (that is, the surface 321 of the current collector 32) is flush with the first surface 132, or is arranged close to the second space 112 relative to the first surface 132.

[0158] In the above technical solution, by positioning at least a portion of the current collector 32 within the avoidance space 10 and not protruding from the first expansion beam 13 toward the first space 111, the placement of the current collector 32 does not interfere with the contact between the battery cell assembly 2 and the first expansion beam 13, thereby simplifying the design. For example, neither the battery cell assembly 2 nor the first expansion beam 13 needs to be restructured to accommodate the protruding portion of the first expansion beam 13, nor does it require additional support structures to be provided between the battery cell assembly 2 and the first expansion beam 13 to achieve this.

[0159] Please refer to Figure 9. In some embodiments of the present application, the side surface of the first expansion beam 13 facing the second space 112 is the second surface 133, at least a portion of the current collector 32 is located in the air-avoiding space 10, and the side surface of the current collector 32 close to the second space 112 (that is, the second surface 322 of the current collector 32) is flush with the second surface 133, or is arranged close to the first space 111 relative to the second surface 133.

[0160] In the above technical solution, by arranging that at least a portion of the current collector 32 is located in the air-avoiding space 10 and the first expansion beam 13 does not protrude toward the second space 112, the arrangement of the current collector 32 does not occupy the second space 112, thereby further improving space utilization.

[0161] In addition, in some embodiments of the present application, when the current collector 32 neither protrudes from the first expansion beam 13 toward the first space 111 nor protrudes from the first expansion beam 13 toward the second space 112, the current collector 32 can more fully utilize the space within the first expansion beam 13, further improving space utilization.

[0162] However, the present application is not limited to this. For example, in other embodiments of the present application, the current collector 32 may be provided with a first expansion beam 13 protruding toward the direction of the first space 111. At this time, a support pad may be provided between the first expansion beam 13 and the battery cell assembly 2, and the support pad forms an avoidance gap at the position corresponding to the current collector 32, so that the first expansion beam 13 can abut against the battery cell assembly 2 through the support pad.

[0163] For example, in other embodiments of the present application, the current collector 32 may be arranged to protrude the first expansion beam 13 toward the second space 112. However, compared with completely setting the current collector 32 in the second space 112, this method can also reduce the space occupied by the current collector 32 in the second space 112, thereby improving space utilization to a certain extent.

[0164] Please refer to Figure 9. In some embodiments of the present application, the current collector 32 is located in the air-avoiding space 10, one end of the adapter 33 is located in the air-avoiding space 10 and penetrates into the current collector 32 to communicate with the current collector 32, and the other end of the adapter 33 extends into the second space 112.

[0165] In the above technical solution, by setting the entire current collector 32 in the air-avoiding space 10, the current collector 32 can reduce the occupation of the second space 112, effectively improving space utilization. By setting one end of the adapter 33 in the air-avoiding space 10 to pass through the current collector 32, not only can the occupation of the second space 112 be further reduced, but the connection method between the current collector 32 and the adapter 33 can also be simplified, making assembly easier, saving parts, and improving the compactness of the fit between the components. For example, by extending the other end of the adapter 33 into the second space 112, it is convenient to connect the adapter 33 to the adapter tube 4 (such as shown in Figure 10) extending into the second space 112, thereby realizing the introduction and discharge of the heat exchange liquid.

[0166] 11 to 14 , in some embodiments of the present application, the adapter 33 is disposed through the first expansion beam 13 so that the other end of the adapter 33 extends into the second space 112. For example, a through hole can be provided on the first expansion beam 13 so that the other end of the adapter 33 passes through the first expansion beam 13, that is, the other end of the adapter 33 passes through the through hole.

[0167] Thus, by setting the adapter 33 to pass through the first expansion beam 13, it is convenient for the adapter 33 to extend into the second space 112, reducing the difficulty of operation, improving assembly efficiency, and simplifying the design and processing difficulty of the box body 11, eliminating the need for special design and processing for passing the adapter 33. Of course, the present application is not limited to this. For example, in other embodiments of the present application, the other end of the adapter 33 can also extend from the bottom of the first expansion beam 13 into the second space 112.

[0168] The form of the through hole is determined according to the structure of the first expansion beam 13. For example, when the first expansion beam 13 is composed of multiple beam plates, a through hole can be processed on each beam plate. In this case, the through holes can be multiple and correspondingly arranged. For example, in some embodiments of the present application, please refer to Figures 12 to 16. The first expansion beam 13 includes a beam outer plate 135 and a beam inner plate 134 arranged in sequence from the second space 112 to the first space 111. The first expansion beam 13 also includes a reinforcement plate 136 supported between the beam outer plate 135 and the beam inner plate 134. The beam inner plate 134 is provided with a first through hole 1342, the reinforcement plate 136 is provided with a second through hole 1362, and the beam outer plate 135 is provided with a third through hole 1352. The first through hole 1342, the second through hole 1362 and the third through hole 1352 correspond to each other and are used to penetrate the adapter 33. Therefore, by setting the first through hole 1342 on the beam inner plate 134, the second through hole 1362 on the reinforcement plate 136, and the third through hole 1352 on the beam outer plate 135, there is no need to reduce the height of any one of the beam inner plate 134, the reinforcement plate 136 and the beam outer plate 135 and move it upward in order to avoid the adapter 33, so that the beam inner plate 134, the reinforcement plate 136 and the beam outer plate 135 can respectively maintain their original heights, have a relatively large support range, and achieve a better support effect on the battery cell assembly 2.

[0169] Referring to Figures 12, 15, and 16, in some embodiments of the present application, the escape space 10 includes a first escape portion 131 formed on the first expansion beam 13, and the first escape portion 131 is open toward the first space 111. Thus, by providing the first escape portion 131 on the first expansion beam 13, which is open toward the first space 111, it is convenient to extend the current collector 32 from one side of the first space 111 toward the second space 112 into the first escape portion 131, thereby reducing the difficulty of installing the current collector 32 into the escape space 10 and improving assembly efficiency.

[0170] In addition, in some embodiments, since the first avoidance portion 131 is provided on the first expansion beam 13, at least a portion of the current collector 32 can be provided in the first avoidance portion 131, so as to utilize the space on the first expansion beam 13 to accommodate at least a portion of the current collector 32, which can further improve space utilization.

[0171] 15 and 16 , illustratively, the first avoidance portion 131 is formed as a recessed structure that is recessed toward the second space 112. Thus, by providing the first avoidance portion 131 as a recessed structure, the structural strength of the first expansion beam 13 at the location of the first avoidance portion 131 can be improved, thereby facilitating protection of the current collector 32 and / or adapter 33 within the avoidance space. Furthermore, the first avoidance portion 131 is easier to process.

[0172] Referring to Figures 15 and 16 , in some embodiments of the present application, the first expansion beam 13 includes an outer beam plate 135 and an inner beam plate 134. The inner beam plate 134 is located away from the second space 112 relative to the outer beam plate 135 and abuts against the battery cell assembly 2 (either directly or indirectly). The first avoidance portion 131 includes a first recessed portion 1341 formed on the inner beam plate 134. The first recessed portion 1341 is recessed toward the second space 112. That is, when the first avoidance portion 131 is formed as a recessed structure recessed toward the second space 112, the first avoidance portion 131 may include the first recessed portion 1341 formed on the inner beam plate 134.

[0173] Thus, by configuring the first expansion beam 13 to include a beam outer plate 135 and a beam inner plate 134, the support reliability of the first expansion beam 13 for the battery cell assembly 2 can be improved, and the cost and weight of the first expansion beam 13 can be reduced. Furthermore, by machining a first recessed portion 1341 on the beam inner plate 134 on the side of the first expansion beam 13 close to the battery cell assembly 2, the first recessed portion 1341 can be opened toward the first space 111. Furthermore, by machining the first recessed portion 1341 locally on the beam inner plate 134 to avoid the current collector 32 and the adapter 33, etc., there is no need to reduce the overall height of the beam inner plate 134 and move it upward to avoid the current collector 32 and the adapter 33. As a result, the beam inner plate 134 can maintain its original height, have a relatively large support range, and achieve a better contact effect with the battery cell assembly 2.

[0174] Please refer to Figures 12, 15 and 16. In some embodiments of the present application, the first expansion beam 13 also includes a reinforcement plate 136 supported between the beam outer plate 135 and the beam inner plate 134, and the first avoidance portion 131 also includes a second recessed portion 1361 formed on the reinforcement plate 136, and the second recessed portion 1361 corresponds to the first recessed portion 1341 and is recessed in a direction away from the first recessed portion 1341.

[0175] Therefore, by arranging a reinforcement plate 136 between the beam outer plate 135 and the beam inner plate 134, the structural strength of the first expansion beam 13 can be improved, which is beneficial to improving the support effect on the battery cell assembly 2, and by locally processing the second recessed portion 1361 of the reinforcement plate 136 to avoid the current collector 32 and the adapter 33, there is no need to reduce and move up the overall height of the reinforcement plate 136 to avoid the current collector 32 and the adapter 33, so that the reinforcement plate 136 can maintain its original height and have a relatively large support range, thereby achieving a better support effect on the battery cell assembly 2.

[0176] Referring to Figures 12, 15, and 16, in some embodiments of the present application, the open area of ​​the first recessed portion 1341 facing the first space 111 is smaller than the open area of ​​the second recessed portion 1361 near the first space 111. Therefore, since the open area of ​​the first recessed portion 1341 facing the battery cell assembly 2 is relatively small, this helps increase the contact range between the beam inner plate 134 and the battery cell assembly 2, thereby improving the reliability of the battery 100. Meanwhile, the open area of ​​the second recessed portion 1361 facing the first recessed portion 1341 is relatively large, which facilitates the first recessed portion 1341 extending into the second recessed portion 1361, reducing the difficulty of assembling the beam inner plate 134 and the reinforcing plate 136, and improving the assembly efficiency of the first expansion beam 13.

[0177] In some embodiments of the present application, please refer to Figure 12, the current collector 32 is located in the air-avoiding space 10, the adapter 33 is in the form of a curved tube and one end is located in the air-avoiding space 10 and passes through the top wall of the current collector 32, and the other end passes through the first expansion beam 13 and extends into the second space 112. Combined with Figures 8, 15 and 16, the top wall of the first recess 1341 has an upper recess 13411, and the upper recess 13411 accommodates the adapter 33.

[0178] For example, the adapter 33 is in the form of a bent pipe and includes a horizontal pipe section and a vertical pipe section. The horizontal pipe section extends from the upper end of the vertical pipe section toward the second space 112, and the lower end of the vertical pipe section penetrates downward into the top wall of the collector 32. The end of the horizontal pipe section away from the vertical pipe section passes horizontally through the first expansion beam 13 toward the second space 112, thereby pushing the collector 32 from the first space 111 to the second space 112. The end of the adapter 33 can pass through the first expansion beam 13, which facilitates assembly and improves assembly efficiency.

[0179] Therefore, by setting the adapter 33 in the form of a bent tube with one end located in the air-avoiding space 10 and passing through the top wall of the current collector 32, and the other end passing through the first expansion beam 13 and extending into the second space 112, it is convenient to improve the assembly efficiency. Moreover, by setting an upper recess 13411 on the top wall of the first recess 1341 to avoid the adapter 33, the open area of ​​the first recess 1341 toward the side of the battery cell assembly 2 can be further reduced, which is beneficial to increase the abutment range between the beam inner plate 134 and the battery cell assembly 2, thereby improving the reliability of the battery 100.

[0180] Of course, the present application is not limited to this. For example, in some other embodiments of the present application, one end of the adapter 33 can also be set to penetrate the side wall of the current collector 32 close to the second space 112, and the other end can bypass the bottom of the first expansion beam 13 and extend into the second space 112.

[0181] In some embodiments of the present application, please refer to Figures 12 to 16. The first expansion beam 13 includes a beam outer plate 135 and a beam inner plate 134 arranged in sequence from the second space 112 to the first space 111. The first expansion beam 13 also includes a reinforcement plate 136 supported between the beam outer plate 135 and the beam inner plate 134. The beam inner plate 134 is provided with a first through hole 1342, the reinforcement plate 136 is provided with a second through hole 1362, and the beam outer plate 135 is provided with a third through hole 1352. The first through hole 1342, the second through hole 1362 and the third through hole 1352 correspond to each other and are used to pass through the adapter 33.

[0182] Therefore, by setting the first through hole 1342 on the beam inner plate 134, the second through hole 1362 on the reinforcement plate 136, and the third through hole 1352 on the beam outer plate 135, there is no need to reduce the height of any one of the beam inner plate 134, the reinforcement plate 136 and the beam outer plate 135 and move it upward in order to avoid the adapter 33, so that the beam inner plate 134, the reinforcement plate 136 and the beam outer plate 135 can respectively maintain their original heights, have a relatively large support range, and achieve a better support effect on the battery cell assembly 2.

[0183] Of course, the present application is not limited to this. For example, in other embodiments of the present application, the first avoidance portion 131 can also be set as a notch structure that passes through the first expansion beam 131. For example, the beam inner plate 134 and the reinforcement plate 136 have corresponding notches, and the beam outer plate 135 has a through hole.

[0184] In some embodiments of the present application, as shown in FIG12 , the surface of the first expansion beam 13 facing the first space 111 is a first surface 132. A filling member 137 is provided at the first relief portion 131, with an outer surface 1371 of the filling member 137 flush with the first surface 132. Thus, by providing the filling member 137 to fill the space in the open surface of the first relief portion 131 not occupied by the heat exchange assembly 3, the filling member 137 can be used to support the corresponding position of the battery cell assembly 2 in the missing position of the first expansion beam 13, thereby enhancing the overall support for the battery cell assembly 2 and improving the reliability of the battery 100. The filling member 137 can be installed in any manner, for example, it can be snap-fitted to the first expansion beam 13 or the housing 11.

[0185] In some embodiments of the present application, as shown in FIG12 , the first avoidance portion 131 is open on one side facing the bottom wall 113 of the housing 11. This facilitates the processing of the first avoidance portion 131 and facilitates the insertion of the current collector 32 and / or adapter 33 into the first avoidance portion 131, thereby improving assembly efficiency.

[0186] Exemplarily, as shown in Figures 12, 17 and 18, when the first avoidance portion 131 is open on one side of the bottom wall 113 of the box body 11, the air avoidance space 10 may also include a second avoidance portion 1131, and the second avoidance portion 1131 is formed by the concave upper surface of the bottom wall 113, that is, the second avoidance portion 1131 is in the form of a groove, at least part of the second avoidance portion 1131 is located below the first expansion beam 13, and at least part of the current collector 32 is embedded in the second avoidance portion 1131.

[0187] Thus, the escape space 10 includes both a first escape portion 131 formed on the first expansion beam 13 and a second escape portion 1131 formed on the bottom wall 113 of the box body 11. This increases the volume of the escape space 10, making it more convenient to accommodate the current collector 32. Furthermore, since the second escape portion 1131 is in the form of a groove, it improves the sealing performance of the box body 11 and reduces the difficulty of sealing the box body 11. Furthermore, by providing the second escape portion 1131 on the bottom wall 113 of the box body 11 to accommodate at least a portion of the current collector 32, the size of the first escape portion 131 can be relatively smaller, which helps reduce the open area of ​​the first recessed portion 1341 facing the battery cell assembly 2, increases the contact range between the beam inner plate 134 and the battery cell assembly 2, and improves the reliability of the battery 100.

[0188] Please refer to Figures 9, 17 and 18. In some embodiments, the second avoidance portion 1131 includes a first slot section 11311 located below the first expansion beam 13, and a second slot section 11312 arranged relative to the first slot section 11311 away from the second space 112. In the direction from the first slot section 11311 to the second slot section 11312 (i.e., in the direction from the second space 112 to the first space 111), the size W of the second slot section 11312 is greater than the size V of the current collector 32.

[0189] For example, during assembly, the current collector 32 can be first loaded into the second slot section 11312, and then the current collector 32 can be pushed in the direction from the first space 111 to the second space 112, so that the current collector 32 moves into the first slot section 11311 and enters the avoidance space 10. Therefore, the installation of the current collector 32 can be achieved by only a simple action of pushing horizontally, thereby reducing the difficulty of assembly and improving assembly efficiency.

[0190] In the above technical solution, by setting the size W of the second slot section 11312 to be larger than the size V of the current collector 32, the second slot section 11312 can pre-accommodate the current collector 32, so that the current collector 32 can be installed into the first slot section 11311 by only a simple action of pushing horizontally, thereby reducing the difficulty of assembly and improving assembly efficiency.

[0191] Please refer to Figures 7 and 8. In some embodiments of the present application, when a first avoidance portion 131 open toward the first space 111 is provided on the first expansion beam 13, the first expansion beam 13 can be constructed as a continuous beam form that is continuous at the corresponding avoidance space 10, that is, the first expansion beam 13 is not a disconnected multi-segment beam form, thereby improving the structural reliability of the first expansion beam 13, being beneficial to supporting the battery cell assembly 2, and facilitating the processing and assembly of the first expansion beam 13.

[0192] In order to realize that the first expansion beam 13 is constructed as a continuous beam in the air avoidance space 10, there can be multiple schemes. For example, the first expansion beam 13 may include a connecting portion arranged corresponding to the air avoidance space 10, and the connecting portion connects the parts on both sides of the first avoidance portion 131. The connecting portion and the parts on both sides of the first avoidance portion 131 can be an integral part, or can be split parts and assembled and connected.

[0193] Of course, the first expansion beam 13 may not be provided with the first avoidance portion 131 that is open toward the first space 111. For example, in other embodiments of the present application, referring to Figures 19 to 21 , the first expansion beam 13 includes a first beam 138, which includes a plurality of beam segments 1381 spaced apart along the length of the first expansion beam 13, and the avoidance space 10 includes a gap 1382 between two adjacent beam segments 1381.

[0194] Therefore, by setting the first expansion beam 13 to include multiple beam sections 1381, and utilizing the gap 1382 between two adjacent beam sections 1381 to avoid the collector 32 and / or the adapter, it is beneficial to achieve flexible assembly of the heat exchange component 3. For example, the first beam 138 can be installed first and then the heat exchange component 3, or the heat exchange component 3 can be installed first and then the first beam 138. The installation direction of the later installed heat exchange component 3 can be flexible. For example, it can be pushed horizontally in the direction from the first space 111 to the second space 112, or it can be inserted from top to bottom, etc.

[0195] In some embodiments of the present application, referring to Figures 19-21, the first expansion beam 13 further includes a second beam 139. The second beam 139 is disposed relative to the first beam 138, away from the second space 112, and blocks the gap 1382 and abuts against the battery cell assembly 2. Thus, by configuring the first expansion beam 13 as a combination of the first beam 138 and the second beam 139, while utilizing the first beam 138 to meet the requirement of avoiding the current collector 32 and / or the adapter 33, the first beam 138 can also be utilized to support the second beam 139, and the second beam 139 can be utilized to support the battery cell assembly 2, thereby enhancing the supporting effect of the first expansion beam 13 on the battery cell assembly 2 and improving the reliability of the battery 100.

[0196] For example, the second beam 139 can be an extruded hollow beam. Therefore, the second beam 139 is easy to process and has good reliability, which is beneficial to improving the supporting effect of the first expansion beam 13 on the battery cell assembly 2 and improving the reliability of the battery 100.

[0197] Exemplarily, as shown in Figures 12, 17 and 18, when the first expansion beam 13 includes a first beam 138, the first beam 138 includes a plurality of beam sections 1381 spaced apart along the length direction of the first expansion beam 13, and the air avoidance space 10 includes a gap 1382 between two adjacent beam sections 1381, the air avoidance space 10 may also include a second avoidance portion 1131, the second avoidance portion 1131 is formed by a recessed upper surface of the bottom wall 113, that is, the second avoidance portion 1131 is in the form of a groove, at least a portion of the second avoidance portion 1131 is located below the first expansion beam 13, and at least a portion of the current collector 32 is embedded in the second avoidance portion 1131.

[0198] Therefore, the air avoidance space 10 also includes a spacing gap 1382 formed on the first expansion beam 13 and a second avoidance portion 1131 formed on the bottom wall 113 of the box body 11, thereby increasing the volume of the avoidance space 10 and being more conducive to accommodating the current collector 32. Moreover, since the second avoidance portion 1131 is in the form of a groove, it is conducive to improving the sealing of the box body 11 and reducing the difficulty of sealing the box body 11.

[0199] Please refer to Figures 9, 17 and 18. In some embodiments, the second avoidance portion 1131 includes a first slot section 11311 located below the first expansion beam 13, and a second slot section 11312 arranged relative to the first slot section 11311 away from the second space 112. In the direction from the first slot section 11311 to the second slot section 11312 (i.e., in the direction from the second space 112 to the first space 111), the size W of the second slot section 11312 is greater than the size V of the current collector 32.

[0200] For example, during assembly, the current collector 32 can be first loaded into the second slot section 11312, and then the current collector 32 can be pushed in the direction from the first space 111 to the second space 112, so that the current collector 32 moves into the first slot section 11311 and enters the avoidance space 10. Therefore, the installation of the current collector 32 can be achieved by only a simple action of pushing horizontally, thereby reducing the difficulty of assembly and improving assembly efficiency.

[0201] In the above technical solution, by setting the size W of the second slot section 11312 to be larger than the size V of the current collector 32, the second slot section 11312 can pre-accommodate the current collector 32, so that the current collector 32 can be installed into the first slot section 11311 by only a simple action of pushing horizontally, thereby reducing the difficulty of assembly and improving assembly efficiency.

[0202] In addition, in some embodiments of the present application, when the escape space 10 does not include the first escape portion 131 and the spacing gap 1382 formed on the first expansion beam 13, if the escape space 10 includes a second escape portion 1131, the second escape portion 1131 is formed by a recessed upper surface of the bottom wall 113, that is, the second escape portion 1131 is in the form of a groove, at least a portion of the second escape portion 1131 is located below the first expansion beam 13, and at least a portion of the current collector 32 is embedded in the second escape portion 1131. As a result, the processing of the first expansion beam 13 can be simplified, and since the second escape portion 1131 is in the form of a groove, it is beneficial to improve the sealing performance of the box body 11 and reduce the difficulty of sealing the box body 11.

[0203] Of course, the present application is not limited thereto. For example, in some other embodiments of the present application, the air avoidance space 10 may further include a third avoidance portion, which is provided at the end of the first expansion beam 13 and / or is formed by the surrounding wall 114 of the box body 11 and the corresponding portion of the end of the first expansion beam 13 being recessed in a direction away from the first expansion beam 13. The "end of the first expansion beam 13" refers to the end of at least one of the two ends of the first expansion beam 13 in the longitudinal direction.

[0204] In some embodiments of the present application, as shown in Figures 2, 3, 5 and 22, the heat exchange element 31 is located inside the housing 11 and between the bottom wall 113 of the housing 11 and the battery cell assembly 2. In the above technical solution, by arranging the heat exchange element 31 inside the housing 11, compared with arranging the heat exchange element 31 outside the housing 11, the heat exchange element 31 can more fully exchange heat with the battery cell assembly 2, thereby improving the temperature regulation efficiency of the battery cell assembly 2 and reducing the waste of heat or cooling. In addition, arranging the heat exchange element 31 inside the housing 11 facilitates the connection between the heat exchange element 31 and the current collector 32 inside the housing 11, thereby reducing the difficulty of sealing the housing 11 and improving the sealing performance of the battery 100.

[0205] In some embodiments of the present application, as shown in Figure 9, when the heat exchange element 31 is located in the box body 11 and between the bottom wall 113 of the box body 11 and the battery cell assembly 2, the bottom surface of the current collector 32 is lower than the bottom surface of the heat exchange element 31, and the end of the heat exchange element 31 close to the second space 112 is penetrated by the side wall of the current collector 32 facing the first space 111.

[0206] This facilitates the connection between the current collector 32 and the heat exchange element 31, improving assembly efficiency. Furthermore, if the upper surface of the bottom wall 113 of the housing 11 has a concave second relief portion 1131, at least a portion of the current collector 32 can be positioned within the second relief portion 1131, thereby reducing the height of the current collector 32 relative to the bottom wall 113, decreasing the distance between the heat exchange element 31 and the bottom wall 113, and minimizing the occupation of the first space 111 by the heat exchange element 31. Moreover, when the second avoidance portion 1131 includes a first slot section 11311 located below the first expansion beam 13, and a second slot section 11312 arranged relative to the first slot section 11311 and away from the second space 112, and in the direction from the first slot section 11311 to the second slot section 11312, the size W of the second slot section 11312 is greater than the size V of the collector 32, during assembly, the assembled heat exchange component 31 and the collector 32 can be installed into place by pushing horizontally from the first space 111 to the second space 112, without the need for other turning or tilting operations, thereby reducing the difficulty of assembly and improving the assembly efficiency.

[0207] In some embodiments of the present application, as shown in FIG3 , the upper surface of the bottom wall 113 has a concave recess 1132, and the heat exchange element 31 is embedded and mated with the recess 1132. This reduces the space occupied by the heat exchange element 31 within the housing 11, thereby increasing the capacity of the battery 100. This also helps improve the stability of the fit between the heat exchange element 31 and the housing 11, thereby enhancing the reliability of the heat exchange element 31 in regulating the temperature of the battery cell assembly 2.

[0208] For example, when the upper surface of the bottom wall 113 has a second avoidance portion 1131 formed in a concave shape, and a concave groove 1132, the groove depth of the second avoidance portion 1131 can be greater than the groove depth of the groove 1132, thereby matching the design in which the bottom surface of the collector 32 is lower than the bottom surface of the heat exchanger 31, which is beneficial to reducing the distance between the heat exchanger 31 and the bottom wall 113.

[0209] In some embodiments of the present application, as shown in Figures 3 and 22, an insulating layer 34 is provided on the upper surface of the bottom wall 113 and the outer surface of the heat exchange element 31, and an insulating adhesive 35 is filled between the bottom wall 113 and the battery cell assembly 2. This improves the insulation between the heat exchange element 31 and the battery cell assembly 2, thereby enhancing the reliability of the battery 100. Furthermore, the provision of the insulating adhesive 35 ensures a stable connection between the battery cell assembly 2, the heat exchange element 31, and the housing 11, thereby improving the stability and reliability of the heat exchange between the heat exchange element 31 and the battery cell assembly 2.

[0210] In some embodiments of the present application, as shown in Figures 23 and 24, the battery 100 also includes: at least one of a first temperature regulating member 51, a second temperature regulating member 52 and a third temperature regulating member 53, wherein the first temperature regulating member 51 is arranged in the box assembly 1 and on the top of the battery cell assembly 2, the second temperature regulating member 52 is arranged between the large surfaces of adjacent battery cells 21 in the battery cell assembly 2, and the third temperature regulating member 53 is arranged outside the box 11 and below the bottom wall 113 of the box 11.

[0211] In the above technical solution, the battery 100 may include only one of the first thermostat 51, the second thermostat 52, and the third thermostat 53; may include two of the first thermostat 51, the second thermostat 52, and the third thermostat 53; or may include all three of the first thermostat 51, the second thermostat 52, and the third thermostat 53. Thus, the thermostats may be positioned appropriately based on actual conditions to meet the temperature regulation requirements of the battery 100.

[0212] In addition, the thermal management system of the battery 100 is not limited to including only the above-mentioned temperature control components. For example, in some embodiments, a heat exchange flow channel can be set in at least one of the first expansion beam 13, the second expansion beam 14 and the third expansion beam 15 for temperature control, thereby constituting a part of the thermal management system.

[0213] In some embodiments of the present application, as shown in FIG25 , the housing assembly 1 includes a bottom guard plate 16 located below the housing 11, and the heat exchange element 31 is located outside the housing 11 and between the bottom wall 113 of the housing 11 and the bottom guard plate 16. Thus, by placing the heat exchange element 31 outside the housing 11, there is no need to consider the insulation between the heat exchange element 31 and the battery cells 11 within the housing 11, thereby simplifying the insulation design of the heat exchange element 31, reducing processing difficulty and production costs, solving the short circuit problem between the battery cells 21 and the heat exchange element 31, and improving the reliability of the battery 100. Furthermore, by placing the heat exchange element 31 outside the housing 11, the heat exchange element 31 does not occupy space within the housing 11, so that the capacity of the battery 100 is not reduced due to the installation of the heat exchange element 31, thereby effectively ensuring the capacity of the battery 100. Moreover, by arranging the heat exchanger 31 below the bottom wall 113 of the box body 11, the heat exchanger 31 can exchange heat with the battery cell assembly 2 in a larger range, thereby improving the temperature control effect and temperature control efficiency of the battery cell assembly 2. Moreover, by arranging the bottom protective plate 16 below the heat exchanger 31, the heat exchanger 31 can be protected more reliably, reducing the risk of damage to the heat exchanger 31 due to collision and bump, thereby improving the working reliability of the heat exchanger 31.

[0214] In some embodiments of the present application, as shown in Figures 25 and 26, the heat exchanger 31 is connected to the current collector 32 via a connecting tube 36 that passes through the bottom wall 113. Thus, by placing the current collector 32 inside the housing 11 and placing the heat exchanger 31 outside the housing 11, and providing a connecting tube 36 that passes through the housing 11 to connect the current collector 32 and the heat exchanger 31, the connection between the current collector 32 and the heat exchanger 31 is facilitated, and the installation of the current collector 32 and the heat exchanger 31 is facilitated. Furthermore, the flow path can be shortened, reducing the flow resistance of the heat exchange liquid. Furthermore, by placing the current collector 32 inside the housing 11, there is no need to provide an external inlet and outlet liquid path outside the housing 11 that is connected to the heat exchanger 31, thereby eliminating the need to increase the sealing difficulty in order to meet the extension requirements of the external inlet and outlet liquid path. This reduces the sealing difficulty of the battery 100, simplifies the structure and cost of the battery 100, and improves the sealing reliability. Furthermore, the built-in current collector 32 is less susceptible to damage due to collisions, reducing the risk of leakage, improving the operational stability and reliability of the heat exchange assembly 3, and enhancing the reliability of the battery 100 during transportation and on-vehicle use. Of course, the present application is not limited thereto. For example, in other embodiments of the present application, the heat exchange element 31 may be configured to partially penetrate the bottom wall 113 to directly connect to the current collector 32 within the housing 11.

[0215] In some embodiments of the present application, as shown in FIG26 , the connecting tube 36 is sleeved within the current collector 32, and a first seal 37 is provided between the current collector 32 and the housing 11 to seal the connection. The first seal 37 is disposed around the mating surface between the current collector 32 and the connecting tube 36. In the above technical solution, by disposing the first seal 37 between the current collector 32 and the housing 11, and disposing the first seal 37 around the mating surface between the current collector 32 and the connecting tube 36, the entire circumference of the connection between the connecting tube 36 and the current collector 32 can be sealed by the first seal 37. This reduces the risk of heat exchange fluid overflowing from the mating point of the connecting tube 36 from the mating point between the current collector 32 and the housing 11 into the housing 11, thereby improving the reliability of the battery 100. Furthermore, the clear location of the first seal 37 makes it easy to assemble the first seal 37, thereby reducing assembly and design difficulties.

[0216] In some embodiments of the present application, as shown in FIG26 , a second seal 38 is further provided at the mating location between the current collector 32 and the connecting tube 36 , and the second seal 38 is disposed around the connecting tube 36 . In the above technical solution, by disposing the second seal 38 between the current collector 32 and the connecting tube 36 , the risk of heat exchange fluid overflowing from the mating location between the current collector 32 and the connecting tube 36 can be reduced, thereby improving the reliability of the battery 100 . Furthermore, the clear location of the second seal 38 makes it easier to assemble the second seal 38 , thereby reducing assembly and design difficulties.

[0217] In some embodiments of the present application, as shown in Figures 25 and 26, the box assembly 1 also includes: a seal 18, which is sealed between the bottom wall 113 and the bottom guard plate 16, and includes a peripheral portion 181 arranged around the heat exchanger 31, and the connecting pipe 36 passes through the bottom wall 113 in the inner ring area corresponding to the peripheral portion 181.

[0218] Thus, by positioning the connection tube 36 through the bottom wall 113 within the area surrounded by the outer peripheral portion 181, when the outer peripheral portion 181 is sealed between the bottom wall 113 and the bottom guard plate 16, muddy water, particulate matter, and the like outside the box assembly 1 are unlikely to pass through the outer peripheral portion 181 and enter between the bottom wall 113 and the bottom guard plate 16, and then flow to the location where the connection tube 36 passes through the bottom wall 113 and enter the box 11, thereby improving the reliability of the battery 100. Furthermore, because the outer peripheral portion 181 surrounds the heat exchange element 31, muddy water, particulate matter, and the like outside the box assembly 1 are unlikely to pass through the outer peripheral portion 181 and enter between the bottom wall 113 and the bottom guard plate 16, thereby contaminating or corroding the heat exchange element 31 between the bottom wall 113 and the bottom guard plate 16, thereby improving the reliability and service life of the heat exchange element 31.

[0219] In some embodiments of the present application, as shown in Figures 25 and 26 , a primer layer 19 is provided between the heat exchanger 31 and the bottom wall 113 and the bottom guard plate 16, respectively. Specifically, the surface of the heat exchanger 31 facing the bottom wall 113 is fixedly connected to the bottom wall 113 via the primer layer 19, and the surface of the heat exchanger 31 facing the bottom guard plate 16 is also fixedly connected to the bottom guard plate 16 via the primer layer 19. This improves the stability of heat transfer between the heat exchanger 31 and the bottom wall 113, while also enhancing the protective properties of both sides of the heat exchanger 31, thereby protecting the heat exchanger 31. It is worth noting that the order in which the primer layer 19 is provided is not limited; for example, it can be applied to both sides of the heat exchanger 31, or to the side of the bottom wall 113 facing the heat exchanger 31, or to the side of the bottom guard plate 16 facing the heat exchanger 31, etc. For example, the primer layer 19 can be structural adhesive, highly thermally conductive double-sided tape, or the like.

[0220] In some embodiments of the present application, as shown in Figures 25 and 26, the heat exchange element 31 includes at least one bent and extended heat exchange tube 312, and the box assembly 1 also includes: a foam part 17, the foam part 17 is arranged between the bottom wall 113 and the bottom guard plate 16, and includes a first foaming portion 171 arranged around the heat exchange element 31, and a second foaming portion 172 arranged between adjacent pipe sections of the same heat exchange tube 312 or between adjacent heat exchange tubes 312.

[0221] Therefore, the foam part 17 can be used to fill the space between the bottom wall 113 and the bottom guard plate 16 where the heat exchange part 31 is removed, that is, it is set to complement the heat exchange part 31, so that the foam part 17 can support the bottom wall 113 and the bottom guard plate 16. When the protective plate 13 is impacted by a collision, the foam part 17 can buffer the impact force and reduce the force of the bottom guard plate 16 impacting the heat exchange part 31 or the box body 11, thereby protecting the heat exchange part 31 and the battery cell assembly 2 in the box body 11. Moreover, the foam part 17 can also fill the gap between the heat exchange tubes 312, and can support and limit the position of the heat exchange tubes 312, so that the heat exchange tubes 312 can be stably in the set position to achieve a stable temperature regulation effect.

[0222] In some embodiments of the present application, as shown in Figures 25 and 26, the foam member 17 is connected to the bottom guard plate 16, and the upper surface of the heat exchange member 31 is higher than the upper surface of the foam member 17. That is, the side surface of the heat exchange member 31 facing the bottom wall 113 is arranged closer to the bottom wall 113 than the side surface of the foam member 17 facing the bottom wall 113. As a result, the difficulty of molding the foam member 17 can be reduced, and it is beneficial to control the thickness uniformity of the foam member 17, so that the arrangement of the foam member 17 will not interfere with the heat transfer coordination between the heat exchange member 31 and the bottom wall 113, thereby improving the stability and reliability of the heat transfer between the heat exchange member 31 and the bottom wall 113, which is beneficial to improving the temperature regulation effect of the battery cell assembly 2, and further improving the operating reliability of the battery 100.

[0223] In addition, when a bottom glue layer 19 is provided between the heat exchanger 31 and the bottom wall 113, the foam part 17 is set to be connected to the bottom guard plate 16, which is conducive to reducing the difficulty of setting the bottom glue layer 19 between the heat exchanger 31 and the bottom wall 113, and is conducive to improving the uniformity of the bottom glue layer 19 provided between the heat exchanger 31 and the bottom wall 113, thereby improving the stability and reliability of heat transfer between the heat exchanger 31 and the bottom wall 113, and is conducive to improving the temperature regulation effect of the battery cell assembly 2, thereby improving the working reliability of the battery 100.

[0224] For example, the foam part 17 can be processed on the bottom guard plate 16 through a mold through a foaming process, so as to ensure the uniformity of the thickness of the foam part 17, and then glue is applied to the heat exchanger 31 or the bottom wall 113, and then the heat exchanger 31 is installed between the protective plate 13 with the foam part 17 and the bottom wall 113. When the heat exchanger 31 protrudes toward the bottom wall 113 relative to the foam part 17, the stability and reliability of the heat transfer cooperation between the heat exchanger 31 and the bottom wall 113 can be guaranteed.

[0225] In other embodiments of the present application, the bottom guard plate 16, the housing 11, and the heat exchanger 31 may be assembled in place first, and then a foaming liquid may be injected between the bottom guard plate 16 and the bottom wall 113 of the housing 11 for foaming. At this time, the injection position of the foaming liquid needs to be considered to ensure uniform foaming height at all locations and avoid affecting the connection between the heat exchanger 31 and the housing 11. Alternatively, in other embodiments of the present application, a foaming part 17 may be processed on the bottom wall 113 of the housing 11 using a mold through a foaming process, and then the heat exchanger 31 and the protective plate 13 may be assembled.

[0226] It is worth noting that the composition and material of the bottom guard plate 16 are not limited. For example, the bottom guard plate 16 can be a single-layer plate, for example, a metal plate and the outer surface has an anti-corrosion layer. Alternatively, the bottom guard plate 16 can also be composed of a combination of multi-layer plates. For example, in conjunction with Figure 25, the bottom guard plate 16 includes a first guard plate 161 and a second guard plate 162, and the second guard plate 162 is located below the first guard plate 161. The first guard plate 161 can be made of metal, and the second guard plate 162 can be made of a corrosion-resistant material, such as PVC (abbreviation of polyvinyl chloride).

[0227] In some embodiments of the present application, as shown in Figures 24 and 27, the battery 100 also includes: at least one of a first temperature regulating member 51, a second temperature regulating member 52 and a fourth temperature regulating member 54, the first temperature regulating member 51 is arranged in the box assembly 1 and on the top of the battery cell assembly 2, the second temperature regulating member 52 is arranged between the large surfaces of adjacent battery cells 21 in the battery cell assembly 2, and the fourth temperature regulating member 54 is arranged in the box 11 and is located between the bottom wall 113 and the battery cell assembly 2.

[0228] That is, the battery 100 may include only one of the first thermostat 51, the second thermostat 52, and the fourth thermostat 54; may include two of the first thermostat 51, the second thermostat 52, and the fourth thermostat 54; or may include all three of the first thermostat 51, the second thermostat 52, and the fourth thermostat 54. Therefore, the thermostat 5 may be positioned appropriately based on actual conditions to meet the temperature regulation requirements of the battery 100.

[0229] In addition, the thermal management system of the battery 100 is not limited to including only the above-mentioned temperature control components. For example, in some embodiments, a heat exchange flow channel can be set in at least one of the first expansion beam 13, the second expansion beam 14 and the third expansion beam 15 for temperature control, thereby constituting a part of the thermal management system.

[0230] In some embodiments of the present application, as shown in Figures 2 and 25, the box body 11 is an integral stamped part and includes a bottom wall 113 and a surrounding wall 114. The heat exchange element 31 is laid on the bottom wall 113, for example, on the upper surface of the bottom wall 113 (for example, the embodiment shown in Figure 2), or on the lower surface of the bottom wall 113 (for example, the embodiment shown in Figure 25). In this way, the heat exchange area between the heat exchange element 31 and the battery cell assembly 2 can be increased, thereby improving the temperature regulation effect of the battery cell assembly 2.

[0231] For example, the housing 11 can be made of sheet metal and stamped into a basin shape to include a bottom wall 113 and a surrounding wall 114. Thus, because the bottom wall 113 and surrounding wall 114 of the housing 11 are stamped and formed integrally, there is no need to consider sealing issues at the connection between the bottom wall 113 and the surrounding wall 114, and a sealing effect can be ensured. This can prevent muddy water from seeping into the housing 11 through the connection between the bottom wall 113 and the surrounding wall 114 and affecting the battery cell assembly 2 within the housing 11, thereby improving the reliability of the battery 100. Furthermore, the integrally stamped housing 11 does not require splicing, which can improve production efficiency.

[0232] In some embodiments of the present application, as shown in Figure 28, the heat exchange element 31 includes a plurality of heat exchange channels 311 arranged in parallel. In this way, since the heat exchange element 31 includes a plurality of heat exchange channels 311 arranged in parallel, when the total length of the channels required for the heat exchange element 31 is fixed, the length of each heat exchange channel 311 can be relatively short, which is beneficial to improving the overall heat exchange efficiency of the heat exchange element 31 and improving the temperature regulation effect of the heat exchange element 31 on the battery cell assembly 2.

[0233] In some embodiments of the present application, as shown in Figure 28, there are two current collectors 32, namely a first current collector 32a and a second current collector 32b. The first end 311a of each heat exchange channel 311 converges and connects to the first current collector 32a, and the second end 311b of each heat exchange channel 311 converges and connects to the second current collector 32b.

[0234] Thus, by providing a first current collector 32a and a second current collector 32b, the first end 311a of each heat exchange channel 311 converges and connects to the first current collector 32a, and the second end 311b of each heat exchange channel 311 converges and connects to the second current collector 32b. Thus, one of the first current collector 32a and the second current collector 32b can serve as a current collector 32 for liquid inlet, and the other can serve as a current collector 32 for liquid outlet. Each current collector 32 does not need to have two channels with opposite flow directions, thus simplifying the structure of the current collector 32 and improving reliability. Furthermore, by converging the ends of multiple heat exchange channels 311 to two corresponding current collectors 32, the number of current collectors 32 can be reduced, reducing material costs.

[0235] It is worth noting that which of the first current collector 32a and the second current collector 32b inputs liquid and which outputs liquid can be specifically set according to actual requirements, or the first current collector 32a and the second current collector 32b can be set to be switchable, that is, whether each current collector 32 inputs liquid or outputs liquid is different in different modes.

[0236] In some embodiments of the present application, as shown in Figures 29 and 30, the current collector 32 is a single piece and includes a first flow channel interface 32c and a second flow channel interface 32d that are isolated from each other. The first flow channel interface 32c is multiple and interconnected, and the second flow channel interface 32d is multiple and interconnected. The multiple first flow channel interfaces 32c are located on both sides of the multiple second flow channel interfaces 32d. The first ends 311a of the multiple heat exchange flow channels 311 correspond to and are connected to the multiple first flow channel interfaces 32c one by one, and the second ends 311b of the multiple heat exchange flow channels 311 correspond to and are connected to the multiple second flow channel interfaces 32d one by one. In this way, the number of current collectors 32 can be reduced, so that only one avoidance space 10 can be opened and the location is concentrated, which is conducive to reducing the difficulty of sealing and assembly, improving production efficiency, and improving the reliability of the battery 100.

[0237] In some embodiments of the present application, as shown in Figures 29-31, the current collector 32 includes a tube body 323, a partitioning structure 324, and a blocking structure 325. The partitioning structure 24 is disposed within the tube body 323, and the blocking structure 325 blocks both ends of the tube body 323. The space within the tube body 323 is divided by the partitioning structure 24 into a first channel 3231 and a second channel 3232, each of which is independent of the other. The first channel 3231 connects to a plurality of first flow channel interfaces 32c, and the second channel 3232 connects to a plurality of second flow channel interfaces 32d. For example, the first channel 3231 includes a first portion located at both ends of the second channel 3232, and a second portion disposed corresponding to the second channel 3232 and connecting the two first portions. As a result, the structure of the current collector 32 is simple, making it easy to process and manufacture. For example, the length of the tube body 323 can be perpendicular to the axial direction of the end of the heat exchange element 31 (i.e., the end connected to the current collector 32).

[0238] In some embodiments of the present application, as shown in Figures 28 and 29, the heat exchange element 31 includes at least one first heat exchange channel 3110. For example, at least one of the multiple heat exchange channels 311 arranged in parallel can be the first heat exchange channel 3110, or the heat exchange element 31 can also include only one heat exchange channel 311, which is the first heat exchange channel 3110.

[0239] Among them, the first heat exchange channel 3110 can include a first heat exchange section 3111, a second heat exchange section 3112 and a third heat exchange section 3113. The second heat exchange section 3112 is bent to form a first U-shaped area Z1. The first heat exchange section 3111 is bent and arranged in the first U-shaped area Z1. The first heat exchange section 3111 and the second heat exchange section 3112 are bent and connected through the third heat exchange section 3113. The second heat exchange section 3112 is located at the outermost side of the circumference of the heat exchange channel 311.

[0240] Since the battery cells 21 arranged on the periphery are closer to the side walls of the box assembly 1 than the internal battery cells 21, the battery cells 21 on the periphery can dissipate heat more easily through the side walls and other structures of the box assembly 1, while the battery cells 21 on the inside have difficulty in dissipating heat and are greatly affected by the heat dissipation of the adjacent battery cells 21. In this way, the heat dissipation conditions of the battery cells 21 at different positions are different, resulting in a relatively uneven temperature distribution between the peripheral battery cells 21 and the internal battery cells 21 in the battery 100 after operation, which makes the battery 100 less stable during operation and the battery performance is prone to attenuation.

[0241] In view of this, in the above technical solution, the second heat exchange section 3112 is bent to form a first U-shaped area Z1, and the first heat exchange section 3111 is bent and arranged in the first U-shaped area Z1, and the second heat exchange section 3112 is arranged to be located at the outermost side of the first heat exchange channel 3110 in the circumferential direction. When the heat exchange element 31 of this embodiment is used to exchange heat with the battery cell assembly 2, at least part of the first U-shaped area Z1 formed by the outer second heat exchange section 3112 can be opposite to at least part of the battery cell 21 on the periphery of the battery 100, so that the second heat exchange section 3112 is located at the outermost side of the first heat exchange channel 3110. 112 can exchange heat on the outer circumference of the battery cell assembly 2, and the first heat exchange section 3111 in the first U-shaped area Z1 is opposite to the internal battery cell 21, so that the heat exchange component 31 can make up for the internal and external temperature difference caused by the heat exchange between the peripheral battery cell 21 and the environment, so that the heat exchange effect of the battery cell 21 outside the battery cell assembly 2 and the battery cell 21 inside the battery cell assembly 2 tends to be consistent, which is beneficial to improving the temperature difference of the battery cell assembly 2 in different environments and improving the temperature uniformity of the battery 100, thereby improving the service life of the battery 100 to a certain extent.

[0242] Exemplarily, when the heat exchange element 31 is heating the battery cell assembly 2, the heat exchange fluid may also flow from the first heat exchange section 3111 to the second heat exchange section 3112, but the heat exchange fluid may also flow from the second heat exchange section 3112 to the first heat exchange section 3111. Exemplarily, when the heat exchange fluid flows from the second heat exchange section 3112 to the first heat exchange section 3111, the battery cells 21 at the periphery of the battery cell assembly 2 may be heated first, and then the heat exchange fluid may cool the battery cells 21 at the middle of the battery cell assembly 2. Since the battery cells 21 at the periphery of the battery 100 dissipate more heat to the external environment, the temperature of the battery cells 21 at the periphery of the battery 100 is more likely to drop. The heat exchange fluid first heats the battery cells 21 at the periphery of the battery 100. The higher temperature heat exchange fluid may increase the temperature of the battery cells 21 at the periphery while compensating for the heat lost by the battery cells 21 due to heat dissipation to the external environment. , to meet its heating needs, the battery cell 21 in the middle of the battery cell assembly 2 has a small contact area with the external environment and a small heat loss. The lower temperature heat exchange fluid flowing in the first heat exchange section 3111 can cooperate with the heat generated by the battery cell 21 itself to well meet its heating needs. As a result, the heating effects obtained by the battery cells 21 at the periphery of the battery 100 and the battery cells 21 at the middle of the battery cell assembly 2 can be basically the same, thereby making the temperatures of the battery cells 21 at the periphery of the battery 100 and the battery cells 21 at the middle of the battery cell assembly 2 more consistent after heating, so that the temperature distribution in the battery 100 is more uniform.

[0243] For example, in this embodiment, when the heat exchange element 31 is dissipating heat and cooling the battery cell assembly 2, the heat exchange fluid can also flow from the first heat exchange section 3111 to the second heat exchange section 3112, but the heat exchange fluid can also flow from the second heat exchange section 3112 to the first heat exchange section 3111. When the heat exchange fluid also flows from the first heat exchange section 3111 to the second heat exchange section 3112, the battery cells 21 in the middle of the battery 100 (that is, the internal battery cells 21 on the inner side of the periphery) can be cooled first, and then the battery cells 21 at the peripheral edge of the battery 100 can be cooled. Since the heat dissipation of the battery cells 21 at the peripheral edge of the battery 100 is better than that of the internal battery cells 21, the heat exchange fluid with a lower temperature in the first heat exchange section 3111 can better meet the heat dissipation requirements of the battery cells 21 at the middle of the battery 100, and at the same time Since the battery cells 21 at the peripheral position can dissipate heat naturally directly to the external environment, when the temperature of the heat exchange fluid in the second heat exchange section 3112 is slightly higher, it can still meet the heat dissipation needs of the peripheral battery cells 21, so that the cooling effects obtained by the battery cells 21 at the peripheral position of the battery 100 and the battery cells 21 at the middle position of the battery 100 are roughly the same, and the temperatures of the battery cells 21 at the peripheral position of the battery 100 and the battery cells 21 at the middle position of the battery 100 after cooling and heat dissipation are relatively consistent, making the temperature distribution inside the battery 100 more uniform.

[0244] In some embodiments of the present application, as shown in Figures 2 and 29, the battery cell assembly 2 includes a plurality of battery cells 20 arranged along a first direction X, each battery cell 20 includes a plurality of battery cells 21 stacked in sequence along a second direction Y, and at least a portion of the second heat exchange section 3112 exchanges heat with the plurality of battery cells 21 located at the outermost circumference of the battery cell assembly 2.

[0245] In the above technical solution, by coordinating the arrangement of the battery cells 21 and the extended arrangement of the first heat exchange channel 3110, and setting at least a portion of the second heat exchange section 3112 to exchange heat with the peripheral battery cells 21, for example, heat transfer can be achieved, which can improve the heat exchange efficiency of the peripheral battery cells 21, and further balance the temperature difference caused by the heat dissipation of the peripheral battery cells 21 in the battery 100 being greater than the heat dissipation of the inner battery cells 21.

[0246] In some embodiments, referring to FIG. 32 , the second heat exchange section 3112 includes a first section R1, a second section R2, and a third section R3 that are sequentially bent and connected to form a first U-shaped region Z1. The first section R1 and the third section R3 both extend along the second direction Y, and the second section R2 extends along the first direction X. In the above technical solution, the coverage area of ​​the first U-shaped region Z1 can be relatively wide, which is conducive to heat exchange with the peripheral battery cells 21 of the battery cell assembly 2, further improving the temperature uniformity of the battery 100.

[0247] In some embodiments, referring to FIG. 32 , the second heat exchange section 3112 further includes a fourth section R4 that is connected to the first section R1 by a bend. The fourth section R4 and the second section R2 are located on either side of the first section R1 along the second direction Y. The fourth section R4 extends in the first direction X toward the third section R3. As a result, the fourth section R4 can block at least a portion of the opening of the first U-shaped region Z1, allowing the second heat exchange section 3112, located on the periphery of the first heat exchange channel 3110, to exchange heat with the battery cells 21 on the periphery of the cell assembly 2 over a wider range, further improving the temperature uniformity of the battery 100.

[0248] In some embodiments, in combination with Figures 32 and 33, the heat exchange element 31 also includes at least one second heat exchange channel 3114, and the second heat exchange channel 3114 and the first heat exchange channel 3110 are bent in the same plane, and the second heat exchange channel 3114 is bent in the first U-shaped area Z1.

[0249] For example, the embodiment of Figure 32 shows one of the matching methods of a first heat exchange channel 3110 and a second heat exchange channel 3114. For example, the embodiment of Figure 33 shows one of the matching methods of a first heat exchange channel 3110 and two second heat exchange channels 3114.

[0250] In the above technical solution, by setting at least one first heat exchange channel 3110 and at least one second heat exchange channel 3114, and by coordinating the relative position relationship between the two, the arrangement of the heat exchange channels can be flexibly designed according to the cooling requirements of the battery 100, thereby further optimizing the temperature regulation effect of the battery cell assembly and improving the temperature uniformity of the battery 100.

[0251] In some embodiments, referring to FIG. 33 , at least one second heat exchange channel 3114 is bent to form a second U-shaped region Z2 , and at least a portion of the first heat exchange segment 3111 is disposed within the second U-shaped region Z2 of the second heat exchange channel 3114 .

[0252] For example, Figure 33 shows that one of the second heat exchange channels 3114 is bent to form a second U-shaped area Z2, at least a portion of the first heat exchange section 3111 is located in the second U-shaped area Z2 of the second heat exchange channel 3114, and another second heat exchange channel 3114 is also located in the second U-shaped area Z2 of the second heat exchange channel 3114.

[0253] In the above technical solution, at least one second heat exchange channel 3114 is bent to form a second U-shaped area Z2, and at least a portion of the first heat exchange section 3111 is arranged in the second U-shaped area Z2 of the second heat exchange channel 3114, which is beneficial to the coordinated cooperation between the first heat exchange channel 3110 and the second heat exchange channel 3114, so as to further improve the temperature uniformity of the battery 100.

[0254] In some embodiments of the present application, as shown in Figures 2 and 29, the heat exchange element 31 includes at least one bent and extended heat exchange tube 312, each heat exchange tube 312 defining a heat exchange channel 311. Therefore, when the heat exchange element 31 includes multiple bent and extended heat exchange tubes 312, the heat exchange element 31 includes multiple heat exchange channels 311. For example, the heat exchange tube 312 can be made of aluminum or steel, for example, aluminum, to reduce the overall weight of the battery 100.

[0255] For example, the heat exchange tube 312 is bent in an arc shape at the bending position. The arc-shaped bend can reduce the flow resistance of the fluid and reduce the pressure drop. Furthermore, the heat exchange tube 312 is bent in an arc shape at the bending position, which can increase the flow rate of the heat exchange fluid in the heat exchange channel 311, thereby increasing the heat exchange efficiency of the heat exchange element 31.

[0256] Exemplarily, heat exchange tube 312 is a flat tube structure. Referring to Figure 23 , a flat tube structure refers to a tube configuration in which the width m is greater than the thickness n. Typically, the heat exchange components used in batteries are double-layer brazed plate structures, consisting of two brazed layers of plate material with a heat exchange channel formed between the two layers. Exemplarily, the flat tube can be constructed by splicing together multiple extruded tube sections. The thickness of the flat tube can be much smaller than that of a double-layer brazed plate structure, thereby occupying a smaller space, increasing the capacity of the battery 100, and reducing the weight, volume, and cost of the battery 100.

[0257] For example, the heat exchange element 31 and the current collector 32 differ in at least their flow surfaces. For example, the cross-sectional area of ​​the flow channel in the heat exchange element 31 is different from that in the current collector 32. Furthermore, the cross-sectional shape of the flow channel in the heat exchange element 31 and that in the current collector 32 may also be different. For example, the current collector 32 may be in the shape of a short rectangular box. When the heat exchange element 31 includes a flat tube structure defining the heat exchange channel 311, the cross-sectional size and shape of the heat exchange channel 311 are different from those of the current collector 32.

[0258] According to a second embodiment of the present application, an electrical device is provided, comprising a battery 100 according to any of the aforementioned solutions, wherein the battery 100 is configured to provide electrical energy to the electrical device. The electrical device may be any of the aforementioned devices or systems employing the battery 100. The improved performance of the battery 100 facilitates improved operating performance of the electrical device.

[0259] Next, a battery 100 according to a specific embodiment of the present application is described.

[0260] The battery 100 includes: a box assembly 1, a battery cell assembly 2 and a heat exchange assembly 3, wherein the box assembly 1 includes: a box body 11 and a box cover 12, the box body 11 is an integrated sheet metal stamping part and includes a bottom wall 113 and a surrounding wall 114 to form a stamped box shape with an open top, the battery cell assembly 2 is arranged in the box body 11, and the box cover 12 is arranged on the top of the box body 11.

[0261] A first expansion beam 13, a second expansion beam 14 and a third expansion beam 15 are provided in the box body 11. The length directions of the first expansion beam 13, the second expansion beam 14 and the third expansion beam 15 all extend along the first direction X. The first expansion beam 13, the second expansion beam 14 and the third expansion beam 15 are arranged in sequence along the second direction Y. A part of the battery cell assembly 2 is arranged between the first expansion beam 13 and the second expansion beam 14, and the rest of the battery cell assembly 2 is arranged between the second expansion beam 14 and the third expansion beam 15.

[0262] The space within the box body 11 is divided into a first space 111 and a second space 112 located on either side of the first expansion beam 13. The first space 111 is the space on one side of the first expansion beam 13 in the second direction Y for mounting the battery cell assembly 2. The second space 112 is the space on the side of the first expansion beam 13 in the second direction Y, away from the battery cell assembly 2. The second space 112 can be used to mount a battery management system and / or a high-voltage box, etc. It is worth noting that the first direction X and the second direction Y are perpendicular, one of which is the length of the box body 11 and the other is the width of the box body 11. The height of the box body 11 is the third direction Z, which is perpendicular to the first direction X and the second direction Y and is the spacing between the bottom wall 113 and the box cover 12.

[0263] An air avoidance space 10 is formed between the first expansion beam 13 and the box body 11. The air avoidance space 10 includes a first avoidance portion 131 and a second avoidance portion 1131. The first avoidance portion 131 is formed on the first expansion beam 13 and is formed as a recessed structure recessed in the direction of the second space 112. The first avoidance portion 131 is open in the direction of the first space 111, and one side of the first avoidance portion 131 facing the bottom wall 113 of the box body 11 is open. The second avoidance portion 1131 is formed on the box body 11 and is formed by the recessed upper surface of the bottom wall 113 of the box body 11. At least part of the second avoidance portion 1131 is located below the first expansion beam 13.

[0264] The first expansion beam 13 includes an outer beam plate 135, an inner beam plate 134, and a reinforcing plate 136. The inner beam plate 134 is positioned relative to the outer beam plate 135, closer to the battery cell assembly 2, and abuts against the battery cell assembly 2. The reinforcing plate 136 is supported between the outer beam plate 135 and the inner beam plate 134. The first escape portion 131 includes a first recessed portion 1341 formed on the inner beam plate 134 and recessed away from the battery cell assembly 2. The first escape portion 131 also includes a second recessed portion 1361 formed on the reinforcing plate 136 and recessed away from the first recessed portion 1341. The second recessed portion 1361 corresponds to the first recessed portion 1341. The inner beam plate 134 is provided with a first through-hole 1342, the reinforcing plate 136 is provided with a second through-hole 1362, and the outer beam plate 135 is provided with a third through-hole 1352. The second avoidance portion 1131 includes a first slot section 11311 located below the first expansion beam 13, and a second slot section 11312 arranged relative to the first slot section 11311 away from the second space 112. In the direction from the first slot section 11311 to the second slot section 11312, the size W of the second slot section 11312 is greater than the size V of the collector 32.

[0265] The heat exchange assembly 3 includes a heat exchanger 31, a current collector 32 and an adapter 33 arranged in the box body 11. The heat exchanger 31 is located between the bottom wall 113 of the box body 11 and the battery cell assembly 2, so that the heat exchanger 31 and the battery cell assembly 2 are arranged for heat exchange. The bottom surface of the current collector 32 is lower than the bottom surface of the heat exchanger 31. The current collector 32 is embedded in the first groove section 11311 and is located in the air-avoiding space 10. The end of the heat exchanger 31 close to the second space 112 extends into the current collector 32 to communicate with the heat exchanger 31. The adapter 33 is in the form of a curved pipe and one end is located in the air-avoiding space 10 and penetrates the top wall of the current collector 32 to communicate with the adapter 33. The other end passes through the first through hole 1342, the second through hole 1362 and the third through hole 1352 and extends into the second space 112. Among them, the heat exchange element 31 includes at least one bent and extended heat exchange tube 312, each heat exchange tube 312 defines a heat exchange flow channel 311, the heat exchange tube 312 is a flat tube structure, and the box body 11 forms a groove 1132 on the upper surface of the bottom wall 113 when stamping, which matches the shape of the heat exchange tube 312.

[0266] During assembly, the first expansion beam 13 and the second expansion beam 14 are first welded to the stamped housing 11 to obtain a first assembly. The first assembly is then subjected to an electrophoresis process, and the heat exchange assembly 3 is then installed into the first assembly. Specifically, the heat exchange assembly 3 can be placed downwardly into the housing 11 as a whole, with the current collector 32 located in the second slot section 11312. The heat exchange assembly 3 is then pushed toward the first expansion beam 13, so that the current collector 32 enters the first slot section 11311 and the end of the adapter 33 passes through the first through-hole 1342, the second through-hole 1362, and the third through-hole 1352. The third expansion beam 15 is then installed in the housing 11 above the heat exchange element 31, and the battery cell assembly 2 can be subsequently installed. As a result, the assembly of the heat exchange assembly 3 is simple and convenient, and the current collector 32 and adapter 33 can occupy as little of the second space 112 as possible, improving space utilization. In addition, the cavity structure of the first expansion beam 13 is relatively strong, which is beneficial for protecting the current collector 32 and adapter 33.

[0267] It should be noted that since the first expansion beam needs to be welded to the box body before the electrophoresis process of the box body, the heat exchange assembly needs to be installed after the first expansion beam. The design considers extending the collector as a whole from the bottom of the first expansion beam to the second space in the direction from the first space to the second space. At this time, the collector will not only occupy the second space, but the passing action will also require a larger gap to be set on the bottom plate of the first expansion beam or the box body, increasing the difficulty of sealing. In addition, the passing action also needs to be accompanied by a turning operation, which is difficult to operate.

[0268] In the embodiment of the present application, the aforementioned air-avoidance space 10 is formed between the first expansion beam 13 and the housing 11 to accommodate the current collector 32, thereby enabling translational installation of the heat exchange assembly 3. This reduces operational difficulty, and the current collector 32 does not occupy the space in the second space 112, thereby improving space utilization. Furthermore, the openings on the first expansion beam 13 can be reduced, which helps to reduce sealing difficulty and improve sealing effectiveness. Furthermore, due to the optimized size of the second space 112, the size of the first space 111 can be relatively increased, thereby increasing the number of battery cells 21 within the first space 111 and improving the volumetric energy density of the battery 100.

[0269] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0270] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery, wherein: include: A box assembly includes a box and a first expansion beam disposed in the box, wherein the space in the box is divided into a first space and a second space by the first expansion beam; a battery cell assembly, disposed in the box and located in the first space, wherein an end of the battery cell assembly abuts against the first expansion beam; A heat exchange assembly is provided in the box assembly and includes a heat exchange member, a current collector and an adapter, wherein the heat exchange member is arranged to exchange heat with the battery core assembly, the heat exchange member is in communication with the current collector, and the adapter is in communication with the current collector; A space is formed between the first expansion beam and the box or on the first expansion beam, and both the current collector and the adapter are arranged in the box, and at least one of them is at least partially located in the space.

2. The battery according to claim 1, wherein The side surface of the first expansion beam facing the first space is the first surface, at least a portion of the current collector is located in the air-avoiding space, and the side surface of the current collector close to the first space is flush with the first surface, or is arranged close to the second space relative to the first surface.

3. The battery according to claim 1 or 2, wherein The side surface of the first expansion beam facing the second space is the second surface, at least part of the current collector is located in the air-avoiding space, and the side surface of the current collector close to the second space is flush with the second surface, or is arranged close to the first space relative to the second surface.

4. The battery according to any one of claims 1 to 3, wherein The current collector is located in the air-avoiding space, one end of the adapter is located in the air-avoiding space and penetrates into the current collector to communicate with the current collector, and the other end of the adapter extends into the second space.

5. The battery according to claim 4, wherein The adapter is disposed through the first expansion beam so that the other end of the adapter extends into the second space.

6. The battery according to any one of claims 1 to 5, wherein The avoidance space includes a first avoidance portion formed on the first expansion beam, and the first avoidance portion is open toward the first space.

7. The battery according to claim 6, wherein The first avoidance portion is formed as a concave structure concave toward the second space.

8. The battery according to claim 7, wherein The first expansion beam includes a beam outer plate and a beam inner plate. The beam inner plate is away from the second space relative to the beam outer plate and abuts against the battery cell assembly. The first avoidance portion includes a first recessed portion formed on the beam inner plate, and the first recessed portion is recessed toward the second space.

9. The battery according to claim 8, wherein The first expansion beam further includes a reinforcing plate supported between the beam outer plate and the beam inner plate, and the first avoidance portion further includes a second recessed portion formed on the reinforcing plate, the second recessed portion corresponding to the first recessed portion and recessed in a direction away from the first recessed portion.

10. The battery according to claim 9, wherein An open area of the first recessed portion facing the first space is smaller than an open area of the second recessed portion facing the first space.

11. The battery according to any one of claims 8 to 10, wherein The current collector is located in the air-avoiding space. The adapter is in the form of a curved pipe and one end is located in the air-avoiding space and passes through the top wall of the current collector, and the other end passes through the first expansion beam and extends into the second space. The top wall of the first recessed portion has an upper recessed portion, which accommodates the adapter.

12. The battery according to claim 11, wherein The first expansion beam includes a beam outer plate and a beam inner plate arranged in sequence from the second space to the first space, and a reinforcement plate supported between the beam outer plate and the beam inner plate, a first through hole is provided on the beam inner plate, a second through hole is provided on the reinforcement plate, and a third through hole is provided on the beam outer plate, the first through hole, the second through hole and the third through hole correspond to and are used to pass through the adapter.

13. The battery according to any one of claims 6 to 10, wherein A side surface of the first expansion beam facing the first space is a first surface. A filling piece is provided at the first avoidance portion. An outer surface of the filling piece is flush with the first surface.

14. The battery according to any one of claims 6 to 13, wherein The first avoidance portion is open at one side facing the bottom wall of the box body.

15. The battery according to any one of claims 6 to 14, wherein The first expansion beam is configured as a continuous beam that is continuous at a position corresponding to the avoidance space.

16. The battery according to any one of claims 1 to 5, wherein The first expansion beam includes a first beam, the first beam includes a plurality of beam sections arranged at intervals along a length direction of the first expansion beam, and the air avoidance space includes a gap between two adjacent beam sections.

17. The battery according to claim 16, wherein The first expansion beam further includes a second beam. The second beam is arranged relative to the first beam and away from the second space, and blocks the gap and abuts against the battery cell assembly.

18. The battery according to claim 17, wherein The second beam is an extruded hollow beam.

19. The battery according to any one of claims 1 to 18, wherein The air avoidance space includes a second avoidance portion, which is formed by the upper surface of the bottom wall of the box body being concave. At least part of the second avoidance portion is located below the first expansion beam, and at least part of the current collector is embedded in the second avoidance portion.

20. The battery according to claim 19, wherein The second avoidance portion includes a first slot section located below the first expansion beam, and a second slot section arranged away from the second space relative to the first slot section. In the direction from the first slot section to the second slot section, the size of the second slot section is larger than the size of the collector.

21. The battery according to any one of claims 1 to 20, wherein The heat exchange component is located in the box body and between the bottom wall of the box body and the battery core assembly.

22. The battery according to claim 21, wherein The bottom surface of the current collector is lower than the bottom surface of the heat exchange element, and the end of the heat exchange element close to the second space is penetrated by a side wall of the current collector facing the first space.

23. The battery according to claim 21 or 22, wherein The upper surface of the bottom wall is provided with a concave groove, and the heat exchange component is embedded in and matched with the groove.

24. The battery according to any one of claims 21 to 23, wherein The upper surface of the bottom wall and the outer surface of the heat exchange component are both provided with an insulating layer, and the space between the bottom wall and the battery core assembly is filled with insulating glue.

25. The battery according to any one of claims 21 to 24, wherein Also includes: at least one of a first temperature regulating element, a second temperature regulating element, and a third temperature regulating element, The first temperature regulating component is arranged in the box assembly and on the top of the battery core assembly; The second temperature regulating member is provided between the large surfaces of adjacent battery cells in the battery core assembly; The third temperature regulating component is arranged outside the box and below the bottom wall of the box.

26. The battery according to any one of claims 1 to 20, wherein The box assembly includes a bottom guard plate located below the box, and the heat exchange component is located outside the box and between the bottom wall of the box and the bottom guard plate.

27. The battery according to claim 26, wherein The heat exchange element is connected to the current collector via a connecting pipe that passes through the bottom wall.

28. The battery according to claim 27, wherein The box assembly also includes: A sealing member is sealingly fitted between the bottom wall and the bottom guard plate and comprises an outer peripheral portion arranged around the heat exchange member, and the connecting pipe passes through the bottom wall in an inner ring area corresponding to the outer peripheral portion.

29. The battery according to any one of claims 26 to 28, wherein A bottom glue layer is provided between the heat exchange component, the bottom wall and the bottom guard plate.

30. The battery according to any one of claims 26 to 29, wherein The heat exchange element includes at least one bent and extended heat exchange tube, and the box assembly further includes: The foaming part is arranged between the bottom wall and the bottom guard plate, and includes a first foaming portion arranged around the heat exchange element, and a second foaming portion arranged between adjacent tube sections of the same heat exchange tube or between adjacent heat exchange tubes.

31. The battery according to claim 30, wherein The foaming member is connected to the bottom guard plate, and the upper surface of the heat exchange member is higher than the upper surface of the foaming member.

32. The battery according to any one of claims 26 to 31, wherein Also includes: at least one of a first temperature regulating element, a second temperature regulating element, and a fourth temperature regulating element, The first temperature regulating component is arranged in the box assembly and on the top of the battery core assembly; The second temperature regulating member is provided between the large surfaces of adjacent battery cells in the battery core assembly; The fourth temperature regulating component is arranged in the box and located between the bottom wall and the battery core assembly.

33. The battery according to any one of claims 1 to 32, wherein The box body is an integral stamped part and includes a bottom wall and a surrounding wall, and the heat exchange element is laid on the bottom wall.

34. The battery according to any one of claims 1 to 33, wherein The heat exchange element includes a plurality of heat exchange channels arranged in parallel.

35. The battery according to claim 34, wherein There are two current collectors, namely a first current collector and a second current collector. The first end of each heat exchange channel converges and connects to the first current collector, and the second end of each heat exchange channel converges and connects to the second current collector.

36. The battery according to claim 34, wherein The collector is one and includes a first flow channel interface and a second flow channel interface that are isolated from each other. The first flow channel interfaces are multiple and interconnected. The second flow channel interfaces are multiple and interconnected. The multiple second flow channel interfaces are respectively located on both sides of the multiple first flow channel interfaces. The first ends of the multiple heat exchange channels correspond one-to-one to and are connected to the multiple first flow channel interfaces. The second ends of the multiple heat exchange channels correspond one-to-one to and are connected to the multiple second flow channel interfaces.

37. The battery according to any one of claims 1 to 36, wherein The heat exchange element includes at least one first heat exchange channel, the first heat exchange channel includes a first heat exchange section, a second heat exchange section and a third heat exchange section, the second heat exchange section is bent to form a first U-shaped area, the first heat exchange section is bent and arranged in the first U-shaped area, and is connected to the second heat exchange section by bending through the third heat exchange section, and the second heat exchange section is located at the outermost side of the circumference of the first heat exchange channel.

38. The battery according to claim 37, wherein The battery cell assembly includes a plurality of battery cells arranged along a first direction, each of the battery cells includes a plurality of battery cells stacked in sequence along a second direction, and at least a portion of the second heat exchange section exchanges heat with the plurality of battery cells located at the outermost circumference of the battery cell assembly.

39. The battery according to claim 37 or 38, wherein The heat exchange element further includes at least one second heat exchange channel, and the second heat exchange channel and the first heat exchange channel are bent in the same plane, and the second heat exchange channel is bent in the first U-shaped region of the first heat exchange channel.

40. The battery according to claim 39, wherein At least one of the second heat exchange channels is bent to form a second U-shaped region, and at least a portion of the first heat exchange section is disposed in the second U-shaped region of the second heat exchange channel.

41. The battery according to any one of claims 1 to 40, wherein The heat exchange element includes at least one bent and extended heat exchange tube, each of the heat exchange tubes defines a heat exchange channel, and the heat exchange tubes are flat tube structures.

42. An electrical device, wherein: Comprising a battery according to any one of claims 1-41.

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