Battery and electrical apparatus

Abstract

A battery and an electrical apparatus, belonging to the technical field of batteries. The battery comprises a box body assembly and a plug-in assembly; the box body assembly comprises a first wall, the first wall having a first through hole; the plug-in assembly is mounted at the box body assembly, and comprises a connector and an adapter; the connector comprises a mounting portion and a power connection portion, the mounting portion being located at an outer side of the first wall; the power connection portion comprises an external power connection terminal located at a side of the mounting portion distant from the first wall, and an internal power connection terminal located at a side of the mounting portion near an internal portion of the box body assembly; the internal power connection terminal is disposed opposite the first through hole; the adapter is at least partially located outside the box body assembly, and supports the mounting portion, causing the mounting portion to be separate from the first wall.

Description

Batteries and electrical devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202420286892.5 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] New energy vehicles have experienced rapid growth in recent years. Batteries, as the power source, play an irreplaceable and important role in electric vehicles. However, different vehicle models require tailored battery structures to meet the requirements for installation and electrical connection between the battery and the vehicle.

[0005] Summary of the Invention

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

[0007] In a first aspect, an embodiment of the present application provides a battery, comprising: a box assembly and a connector assembly, the box assembly comprising a first wall having a first through-hole, the connector assembly being mounted on the box assembly and comprising a connector and an adapter, the connector comprising a mounting portion and a power connection portion, the mounting portion being located on the outside of the first wall, the power connection portion comprising an external power terminal located on a side of the mounting portion away from the first wall, and an internal power terminal located on a side of the mounting portion close to the inside of the box assembly, the internal power terminal being arranged corresponding to the first through-hole, at least a portion of the adapter being located outside the box assembly, and supporting the mounting portion so that the mounting portion is spaced apart from the first wall.

[0008] In the above technical solution, an adapter is provided at the fitting point between the first wall and the connector, so that the relative position of the connector and the first wall can be changed according to the size of the adapter. Therefore, for different electrical devices, there is no need to differentiate the size of the box assembly or the size of the connector. It is only necessary to select an adapter of appropriate size according to the actual situation of different electrical devices to separate the connector from the first wall at a suitable distance, thereby meeting the applicability of the battery to different electrical devices, realizing the compatibility of the box assembly and the connector, and reducing manufacturing costs.

[0009] In some embodiments, the adapter includes a supporting portion disposed between the first wall and the mounting portion to support the mounting portion.

[0010] In the above technical solution, because the adapter includes a support portion disposed between the first wall and the mounting portion, and the support portion is arranged corresponding to the mounting portion, the support portion provides more reliable and stable support for the connector, allowing the connector to maintain a stable electrical connection with the plug-in structure of the electrical device, thereby improving the stability and reliability of the battery powering the electrical device. Furthermore, the adapter and connector fit together compactly, which helps reduce the overall space occupied by the connector assembly.

[0011] In some embodiments, the support portion is disposed around the first through-hole, and a second through-hole corresponding to the first through-hole is formed on the support portion, and the power connection portion is disposed in the second through-hole.

[0012] In the above technical solution, the support portion facilitates wider support of the mounting portion, further enhancing the stability of the docking connector. Furthermore, the form and placement of the adapter facilitates improved sealing of the housing assembly at the connector installation site, improving battery reliability. Furthermore, the support portion shields the electrical connector, minimizing risks of short circuits or leakage, thereby enhancing battery reliability.

[0013] In some embodiments, a first sealing member is provided between the support portion and the first wall, and the first sealing member is disposed around the first through-hole.

[0014] In the above technical solution, the provision of the first sealing member improves the sealing performance of the adapter and the housing assembly, thereby improving the sealing performance of the housing assembly at the connector installation location and enhancing battery reliability. Furthermore, the provision of the first sealing member between the adapter and the first wall is simple and easy to implement, reducing sealing difficulty and improving sealing effectiveness.

[0015] In some embodiments, the end surface of the support portion facing the first wall has an annular groove, and the first sealing member is embedded in the groove.

[0016] In the above technical solution, by embedding the first seal in the groove, the installation stability of the first seal can be improved, and the sealing reliability of the mating position between the first wall and the adapter can be improved. Moreover, by machining the groove on the adapter rather than on the first wall, the processing difficulty and production cost of the box assembly can be reduced. In addition, machining the groove on the adapter facilitates increasing the groove depth, thereby improving the stability of the mating between the first seal and the groove, and further improving the sealing reliability of the first seal.

[0017] In some embodiments, a second sealing member is provided between the supporting portion and the mounting portion, and the second sealing member is disposed around the second through-hole.

[0018] In the above technical solution, the provision of a second sealant improves the sealing performance of the adapter and connector, thereby enhancing the sealing performance of the housing assembly where the connector is mounted, and improving battery reliability. Furthermore, the provision of a second sealant between the adapter and the mounting portion is simple and easy to implement, reducing sealing difficulty and improving sealing effectiveness.

[0019] In some embodiments, the supporting portion includes an end plate portion and a surrounding plate portion, the surrounding plate portion is arranged around the first perforation, the end plate portion is connected to the end of the surrounding plate portion away from the first wall, the mounting portion is supported on the side of the end plate portion away from the first wall, the second perforation passes through the end plate portion, and an avoidance cavity open toward the first wall is formed between the end plate portion and the surrounding plate portion, the avoidance cavity connects the first perforation and the second perforation, and the cross-sectional area of ​​the avoidance cavity is larger than the cross-sectional area of ​​the second perforation.

[0020] In the above technical solution, the adapter can be formed in the form of a cover, which can achieve weight reduction and reduce costs.

[0021] In some embodiments, the enclosure portion includes a first enclosure segment and a second enclosure segment arranged in sequence from the end plate portion to the first wall. The wall thickness of the first enclosure segment gradually decreases along the direction from the end plate portion to the first wall, and the wall thickness of the second enclosure segment is greater than the wall thickness of the end of the first enclosure segment close to the first wall.

[0022] In the above technical solution, the first enclosure portion gradually thickens toward the end plate portion, which can improve the connection strength between the enclosure portion and the end plate portion, and improve the support stability of the enclosure portion to the end plate portion. By setting the wall thickness of the second enclosure section to be greater than the wall thickness of the end portion of the first enclosure section close to the first wall, the stability of the enclosure portion supported on the first wall can be improved, thereby improving the support stability of the adapter docking plug, so that the connector can be stably electrically connected to the plug-in structure of the electrical device, thereby improving the stability and reliability of the battery powering the electrical device.

[0023] In some embodiments, a through hole is provided on the support portion, the through hole is provided corresponding to the first through hole, and an opening formed by the through hole on a side surface of the support portion away from the first wall constitutes a second through hole.

[0024] In the above technical solution, the structure of the adapter can be simplified, the processing of the adapter is facilitated, and the supporting strength of the adapter is improved.

[0025] In some embodiments, the adapter is entirely located outside the first wall.

[0026] In the above technical solution, by placing the adapter as a whole outside the box assembly, the adapter can be installed, replaced, etc. directly from the outside of the box assembly, thereby facilitating the assembly and disassembly of the adapter, and the adapter will not occupy the space inside the box assembly, which is conducive to ensuring the capacity of the battery.

[0027] In some embodiments, the connector is connected to the adapter, and the adapter is connected to the first wall.

[0028] The above technical solution is beneficial to improving the connection reliability between the connector and the adapter, and is beneficial to improving the connection reliability between the adapter and the first wall, thereby improving the reliability of the connector assembly installed in the box assembly.

[0029] In some embodiments, the adapter includes a supporting portion, which is disposed between the first wall and the mounting portion to support the mounting portion, and the mounting portion is connected to the supporting portion.

[0030] In the above technical solution, because the adapter includes a support portion disposed between the first wall and the mounting portion, and the support portion is disposed corresponding to the mounting portion, the support portion provides more reliable and stable support for the connector. Furthermore, the adapter utilizes the position where it supports the connector to connect with the connector, thereby reducing the difficulty of connecting the adapter and the connector and simplifying the structural design.

[0031] In some embodiments, the mounting portion and the supporting portion are connected by a first connecting member, which includes a first rod portion and a first head portion. The first head portion abuts against a side of the mounting portion away from the supporting portion, and the first rod portion passes through the mounting portion and is connected to the supporting portion.

[0032] In the above technical solution, the connector and the adapter can be assembled from the outside, which improves the convenience of assembly. Moreover, the adapter and the connector can be installed before the adapter is connected to the first wall, or after the adapter is connected to the first wall, thereby making the assembly steps flexible.

[0033] In some embodiments, the adapter further includes a connecting portion, which is located at the periphery of the supporting portion and exceeds the coverage range of the mounting portion, and the connecting portion is connected to the first wall.

[0034] In the above technical solution, since the adapter also includes a connecting portion located on the periphery of the supporting portion, and the connecting portion exceeds the coverage range of the mounting portion, the connection position of the connecting portion and the first wall can be staggered with the connection position of the supporting portion and the mounting portion, so that the connection between the connecting portion and the first wall does not affect the support and connection of the supporting portion to the mounting portion. Therefore, there is no order requirement for the connection steps between the mounting portion and the supporting portion, and the connection steps between the connecting portion and the first wall, which makes the assembly flexible.

[0035] In some embodiments, the connecting portion is connected to the first wall through a second connecting member, which includes a second rod and a second head. The second head abuts against the side of the connecting portion away from the first wall, and the second rod passes through the connecting portion and is connected to the first wall.

[0036] In the above technical solution, the adapter and the box assembly can be assembled from the outside, which improves the convenience of assembly. Moreover, the adapter and the box assembly can be installed before the adapter and the connector, or after the adapter and the connector are connected, thereby making the assembly steps flexible.

[0037] In some embodiments, the adapter further includes a reinforcing oblique rib connected between the supporting portion and the connecting portion.

[0038] In the above technical solution, the structural strength of the adapter can be improved, which can not only improve the connection reliability between the adapter and the first wall, but also improve the support reliability of the adapter docking plug-in.

[0039] In some embodiments, the support portion is connected to the first wall via a third connecting member, the third connecting member includes a third rod portion and a third head portion, the third head portion abuts against the inner side of the first wall, and the third rod portion passes through the first wall and is connected to the support portion.

[0040] In the above technical solution, the adapter and the box assembly can be assembled from the inside, which helps to reduce the size and space occupied by the adapter. In addition, when the mounting portion and the support portion are connected via the above-mentioned first connecting member, the adapter and the box assembly can be installed before the adapter and the connector, or after the adapter and the connector are connected, thereby making the assembly steps flexible. When the adapter is connected to the first wall, only the adapter and the first wall need to be aligned, and when the adapter is connected to the connector, only the adapter and the connector need to be aligned, thereby reducing the difficulty of assembly and further improving assembly efficiency.

[0041] In some embodiments, a connection position between the support portion and the mounting portion is staggered from a connection position between the support portion and the first wall.

[0042] In the above technical solution, when the wall thickness of the support portion is relatively thin, by staggering the two connection positions, the wall thickness at different positions of the support portion can be utilized to meet the connection requirements. Of course, if the wall thickness of the support portion is sufficient, the two connection positions can also be set to correspond, or the two connection positions can be staggered, thereby achieving flexible design.

[0043] In some embodiments, the connector, the adapter and the first wall are connected together via a fourth connecting member.

[0044] The above technical solution is beneficial for reducing the volume and occupied space of the adapter, and can save the number of connectors used and reduce costs.

[0045] In some embodiments, the fourth connecting member includes a fourth rod portion and a fourth head portion, the fourth head portion abuts against a side of the mounting portion away from the adapter, and the fourth rod portion passes through the mounting portion and the adapter portion and is connected to the first wall.

[0046] In the above technical solution, the connector assembly and the box assembly can be assembled from the outside, thereby improving the convenience of assembly.

[0047] In some embodiments, in the axial direction of the first through hole, a distance between the mounting portion and the first wall is greater than a wall thickness of the mounting portion.

[0048] In the above technical solution, when the spacing distance between the mounting portion and the first wall is relatively large, it is more necessary to provide an adapter that meets the support strength and sealing requirements between the connector and the box assembly.

[0049] In some embodiments, the box assembly includes a box, the battery includes a cell assembly arranged in the box, the cell assembly includes multiple battery cells, the battery includes a thermostat, the thermostat includes at least one of a first thermostat, a second thermostat and a third thermostat, the first thermostat is arranged outside the box and is in contact with the outer wall of the box, the second thermostat is arranged in the box and is located between the cell assembly and the box assembly, and the third thermostat is arranged in the box and is located between adjacent battery cells.

[0050] In the above technical solution, the battery may include only one of the first, second, and third thermostats, or may include two of the first, second, and third thermostats simultaneously, or may include all three. Thus, the thermostats may be positioned appropriately based on actual conditions to meet the battery's temperature regulation requirements.

[0051] In some embodiments, the box assembly includes a box that is an integral stamped part, and the box includes a bottom wall and a surrounding wall, and one side wall of the surrounding wall constitutes the first wall.

[0052] In the above technical solution, because the bottom wall and surrounding wall of the box are integrally stamped and formed, there is no need to consider sealing issues at the junction between the bottom wall and the surrounding wall, and a sealing effect can be guaranteed. This prevents muddy water from seeping into the box through the junction and affecting the battery cell assembly, thereby improving battery reliability. Moreover, the integrally stamped box does not require splicing, which can improve production efficiency. In addition, the connector is located on the side of the box assembly, rather than on the bottom or top surface, which helps to reduce the difficulty of connecting the connector to the plug-in structure on the electrical device.

[0053] In some embodiments, a battery cell assembly is provided in the box, and a heat exchange element is laid on the bottom wall of the box, and the heat exchange element is arranged to exchange heat with the battery cell assembly.

[0054] In the above technical solution, the heat exchange area between the heat exchange element and the battery cell assembly can be increased, thereby improving the temperature regulation effect of the battery cell assembly.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] In the above technical solution, since the performance of the battery is improved, it is beneficial to improve the working power performance of the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] 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.

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

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

[0070] FIG3 is a schematic diagram of a box assembly and a connector assembly provided in Example 1 of the present application;

[0071] FIG4 is a partial enlarged view of the circled portion A in FIG3 ;

[0072] FIG5 is an assembly diagram of the box assembly and the connector assembly shown in FIG3 ;

[0073] FIG6 is a partial enlarged view of the circled portion B in FIG5 ;

[0074] FIG7 is a cross-sectional view of the box assembly and the connector assembly shown in FIG5 ;

[0075] FIG8 is an orthographic view of the box assembly and the connector assembly shown in FIG5 ;

[0076] FIG9 is a partial enlarged view of the circled portion C in FIG8 ;

[0077] FIG10 is an assembly diagram of the box assembly and the connector assembly provided in Example 2 of the present application;

[0078] FIG11 is an exploded view of the box assembly and the connector assembly shown in FIG10 ;

[0079] FIG12 is a cross-sectional view of the box assembly and the connector assembly shown in FIG10;

[0080] FIG13 is an orthographic projection view of the box assembly and the connector assembly shown in FIG10;

[0081] FIG14 is an assembly diagram of the box assembly and the connector assembly provided in Example 3 of the present application;

[0082] FIG15 is an exploded view of the box assembly and the connector assembly shown in FIG14 ;

[0083] FIG16 is a cross-sectional view of the box assembly and the connector assembly shown in FIG14;

[0084] FIG17 is an orthographic view of the box assembly and the connector assembly shown in FIG14;

[0085] FIG18 is a partial cross-sectional view of a battery provided in some embodiments of the present application;

[0086] FIG19 is an exploded view of a portion of a battery provided by some embodiments of the present application;

[0087] FIG20 is an assembly diagram of a portion of a battery provided by some embodiments of the present application;

[0088] FIG21 is an exploded view of a portion of a battery provided by some embodiments of the present application;

[0089] FIG22 is an exploded view of a heat exchange component, etc., provided in some embodiments of the present application;

[0090] FIG23 is a partial cross-sectional view of a battery provided in some embodiments of the present application;

[0091] FIG24 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;

[0092] FIG25 is a schematic diagram of a heat exchange element provided in some embodiments of the present application;

[0093] FIG26 is a schematic diagram of a heat exchange component provided in some other embodiments of the present application.

[0094] Reference numerals: vehicle 1000; battery 100; controller 200; motor 300; box assembly 1; first direction X; second direction Y; third direction Z; box 11; first wall 111; first through-hole 1111; bottom wall 11a; surrounding wall 11b; second wall 112; first space 113; second space 114; box cover 12; expansion beam 13; first expansion beam 131; second expansion beam 132; bottom guard plate 14; first guard plate 141; second guard plate 142; Foaming element 17; first foaming portion 171; second foaming portion 172; sealing element 18; peripheral portion 181; bottom adhesive layer 19; battery cell assembly 2; battery cell 21; battery unit 20; heat exchange element 31; 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; connecting tube 36; first sealing member 37; second sealing member 38; connector assembly 4; connector 41; mounting portion 411; power connection portion 412; external power terminal 4121; internal power terminal 4122; adapter 42; support portion 421; second through-hole 4211; groove 4212; end plate portion 4213; enclosure portion 4214; first enclosure section 42141; second enclosure section 42142; avoidance cavity 4215; through-hole 4216; Connecting portion 422; reinforcing oblique rib 423; first sealing member 51; protrusion 511; second sealing member 52; first connecting member 61; first rod 611; first head 612; second connecting member 62; second rod 621; second head 622; third connecting member 63; third rod 631; third head 632; fourth connecting member 64; fourth rod 641; fourth head 642; thermostat 7; first thermostat 71; second thermostat 72; third thermostat 73. DETAILED DESCRIPTION

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] The term "plurality" used in this application refers to two or more (including two).

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] The material of the isolation film is not limited, and can be, for example, polypropylene or polyethylene.

[0109] When the battery in the related art is used in an electrical device, a battery mounting position and a plug-in structure will be set on the electrical device. The battery is installed in the battery mounting position, and the battery has a connector that plugs into the plug-in structure to achieve electrical conduction. However, the relative positions of the battery mounting position and the plug-in structure on different electrical devices are different. Different box assemblies or connectors need to be separately set for different powered devices, which has poor compatibility and high manufacturing costs.

[0110] To this end, an embodiment of the present application proposes a battery. By arranging an adapter between the box assembly and the connector, the relative position of the connector and the box assembly can be changed by selecting adapters of different sizes for different electrical devices depending on the relative position of the battery mounting position and the plug-in structure. In this way, the battery can be installed in the battery mounting position without changing the box assembly and the connector structure, and the connector can be docked with the plug-in structure, thereby adapting to various situations where the relative position of the battery mounting position and the plug-in structure is different, thereby improving the applicability of the battery and reducing manufacturing costs.

[0111] The present invention provides an electrical device using a battery as a power source. The electrical device may include, 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, and the like. 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. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] Please refer to Figure 2, which is an exploded view of the structure of the battery 100 provided in some embodiments of the present application. The battery 100 includes a box assembly 1 and a cell assembly 2. The cell assembly 2 is arranged in the box assembly 1. 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.

[0116] The battery 100 may also include other structures. For example, the battery 100 may also include a thermostat 7, which is used to exchange heat with the battery cell assembly 2 to regulate the temperature of the battery cell assembly 2, thereby improving the operating reliability of the battery 100. For another example, the battery 100 may also include a busbar assembly, which is used to electrically connect 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 to these. The battery cell 21 may be cylindrical, flat, or rectangular.

[0117] As shown in Figures 3 and 4, the box assembly 1 includes a first wall 111, and the first wall 111 has a first perforation 1111. In the embodiments of the present application, the shape and structure of the box assembly 1 are not limited. For example, the box assembly 1 can include a box body 11 and a box cover 12 provided on the box body 11. The box body 11 can be in a shape with an open top or a shape with an open bottom, etc. For example, the box body 11 can be a sheet metal part that is stamped into one piece, or a component formed by splicing multiple sheet metals, etc. Among them, it is not limited to which wall of the box assembly 1 the first wall 111 is, and it can be determined according to the specific shape of the box assembly 1 and the specific actual situation. For example, it can be a side wall, a top wall, or a bottom wall of the box assembly 1, etc.

[0118] As shown in Figures 4 to 6, the battery 100 also includes a connector assembly 4, which is installed on the box assembly 1. The connector assembly 4 includes a connector 41. The connector 41 includes a mounting portion 411 and an electrical connection portion 412. The mounting portion 411 is located on the outside of the first wall 111 (that is, the side of the first wall 111 away from the interior of the box assembly 1, and the side of the first wall 111 close to the interior of the box assembly 1 is the inner side of the first wall 111). The electrical connection portion 412 includes an external electrical terminal 4121 located on the side of the mounting portion 411 away from the first wall 111, and an internal electrical terminal 4122 located on the side of the mounting portion 411 close to the interior of the box assembly 1. The internal electrical terminal 4122 is arranged corresponding to the first through-hole 1111. In an embodiment of the present application, the function of the connector 41 can be to realize the electrical connection between the battery 100 and the electrical device, and the internal electrical terminal 4122 of the electrical connection part 412 extends from the first through-hole 1111 into the box assembly 1 or is exposed at the first through-hole 1111, so that the battery cell assembly 2 in the box assembly 1 can be electrically connected to the internal electrical terminal 4122, and the external electrical terminal 4121 of the electrical connection part 412 is located outside the box assembly 1 and is used to be plugged into the plug-in structure of the electrical device. For example, the external electrical terminal 4121 can be used as a socket of the high-voltage connector of the battery 100 and plugged into the plug-in structure (such as a plug) of the electrical device.

[0119] As shown in Figures 4 and 6, at least a portion of the adapter 42 is located outside the housing assembly 1, supporting the mounting portion 411 so that the mounting portion 411 is spaced apart from the first wall 111. That is, by providing the adapter 42, the adapter 42 provides support, thereby creating a gap between the mounting portion 411 and the first wall 111, while the non-mounting portion 411 is in close contact with the first wall 111. The space between the mounting portion 411 and the first wall 111 can be left empty or filled by the adapter 42, without limitation. As long as there is a gap between the mounting portion 411 and the first wall 111, the space between the mounting portion 411 and the first wall 111 is considered to be spaced apart. The relative position of the adapter 42 and the box assembly 1 is not limited. For example, only a portion of the adapter 42 can be located outside the box assembly 1, or the entire adapter 42 can be located outside the box assembly 1. As long as the adapter 42 can support the mounting portion 411 so that there is a distance between the mounting portion 411 and the first wall 111, the protruding position of the external electrical terminal 4121 relative to the first wall 111 meets the requirements of the plug-in structure.

[0120] Therefore, according to the embodiment of the present application, by providing an adapter 42 at the connection between the box assembly 1 and the connector 41, the relative position of the connector 41 and the box assembly 1 can be changed according to the size of the adapter 42. Therefore, for different electrical devices, there is no need to design the size of the box assembly 1 differently, nor is there any need to design the size of the docking plug 41 differently. It is only necessary to select an adapter 42 of appropriate size according to the actual situation of different electrical devices (such as the relative position of the battery mounting position and the docking structure on the electrical device) to separate the connector 41 from the box assembly 1 by an appropriate distance, so that the protruding position of the connector 41 relative to the box assembly 1 can take into account the requirements of the battery 100 being installed in the battery mounting position and the connector 41 being connected to the docking structure on the electrical device, thereby meeting the applicability of the battery 100 to different electrical devices, realizing the compatibility of the box assembly 1 and the connector 41, and reducing the manufacturing cost.

[0121] In related art, the battery connector is directly mounted on the housing, and its protruding position relative to the housing is fixed. If the relative position of the battery mounting position on the electrical device and the plug-in structure changes, the connector that plugs into the plug-in structure cannot be installed on the housing, or the connector mounted on the housing cannot approach the plug-in structure on the electrical device, making plug-in impossible. Therefore, the only way to achieve this is to change the dimensions of the housing or the connector to ensure that the protruding position of the connector on the battery mounting position relative to the housing meets the requirements for plugging the connector into the plug-in structure. However, such housings and connectors cannot meet interoperability requirements and increase manufacturing costs.

[0122] According to the battery 100 of the embodiment of the present application, an adapter 42 is provided at the connection between the box assembly 1 and the connector 41. The adapter 42 makes it possible to adjust the position of the connector 41 relative to the box assembly 1, so that the protruding position of the connector 41 relative to the box assembly 1 can meet the connection requirements of the connector 41 and the plug-in structure on different electrical devices, and can be suitable for different electrical devices.

[0123] In some embodiments of the present application, as shown in Figures 4, 6, and 7, the adapter 42 includes a support portion 421, which is disposed between the first wall 111 and the mounting portion 411 to support the mounting portion 411. Thus, because the adapter 42 includes the support portion 421 disposed between the first wall 111 and the mounting portion 411, and the support portion 421 is disposed corresponding to the mounting portion 411, the support provided by the support portion 421 to the connector 41 is more reliable and stable, allowing the connector 41 to be stably electrically connected to the plug-in structure of the electrical device, thereby improving the stability and reliability of the battery 100 supplying power to the electrical device. Furthermore, the adapter 42 and the connector 41 fit compactly, which helps reduce the overall space occupied by the connector assembly 4.

[0124] In some embodiments of the present application, as shown in Figures 4, 6 and 7, the support portion 421 is arranged around the first perforation 1111, and a second perforation 4211 corresponding to the first perforation 1111 is provided on the support portion 421, and the power connection portion 412 is passed through the second perforation 4211. As a result, the support portion 421 is conducive to supporting the installation portion 411 over a larger range, thereby further improving the support stability of the docking plug 41, so that the connector 41 can be stably electrically connected to the plug-in structure of the electrical device, thereby improving the stability and reliability of the battery 100 supplying power to the electrical device. Moreover, the form and setting position of the adapter 42 are conducive to improving the sealing of the box assembly 1 at the installation location of the connector 41, thereby improving the reliability of the battery 100. In addition, the support portion 421 can also shield the power connection portion 412, thereby increasing the risk of short circuit or leakage of the power connection portion 412, and improving the reliability of the battery 100.

[0125] Of course, the present application is not limited thereto. For example, in other embodiments of the present application, the support portion 421 may not be arranged around the first through-hole 1111 . For example, the support portion 421 may also be a plurality of pillars spaced apart around the power connection portion 412 .

[0126] In some embodiments of the present application, as shown in Figures 4 and 7 , a first sealing member 51 is disposed between the support portion 421 and the first wall 111, and the first sealing member 51 is disposed around the first perforation 1111. Thus, the provision of the first sealing member 51 can enhance the sealing performance of the mating position between the adapter 42 and the case assembly 1, thereby improving the sealing performance of the case assembly 1 at the point where the connector 41 is installed, and enhancing the reliability of the battery 100. Furthermore, the provision of the first sealing member 51 between the adapter 42 and the first wall 111 is simple and easy to implement, reducing the sealing difficulty and enhancing the sealing effect.

[0127] For example, as shown in Figures 4 and 7, the end surface of the support portion 421 facing the first wall 111 has an annular groove 4212, and the first sealing member 51 is a sealing ring and is embedded in the groove 4212. Therefore, by embedding the first sealing member 51 in the groove 4212, the installation stability of the first sealing member 51 can be improved, and the sealing reliability of the matching position between the first wall 111 and the adapter 42 can be improved. Moreover, by processing the groove 4212 on the adapter 42 instead of processing it on the first wall 111, the processing difficulty and production cost of the box assembly 1 can be reduced. In addition, processing the groove 4212 on the adapter 42 is conducive to increasing the depth of the groove 4212, thereby improving the stability of the matching between the first sealing member 51 and the groove 4212, and thus improving the sealing reliability of the first sealing member 51.

[0128] For example, as shown in Figures 4 and 7, the inner and outer ring surfaces of the first seal 51 each have a plurality of protrusions 511 spaced circumferentially. The first seal 51 is interference-fitted with the groove 4212 via the protrusions 511. That is, the plurality of protrusions 511 on the inner ring surface of the first seal 51 are interference-fitted with the inner ring surface of the groove 4212, and the plurality of protrusions 511 on the outer ring surface of the first seal 51 are interference-fitted with the outer ring surface of the groove 4212. This improves the reliability of the fit between the first seal 51 and the groove 4212, further enhancing the sealing reliability of the first seal 51.

[0129] In some embodiments of the present application, as shown in FIG7 , a second sealing member 52 is provided between the support portion 421 and the mounting portion 411. The second sealing member 52 is disposed around the second perforation 4211. Thus, the provision of the second sealing member 52 improves the sealing performance of the mating position between the adapter 42 and the connector 41, thereby enhancing the sealing performance of the box assembly 1 at the mounting position of the connector 41 and improving the reliability of the battery 100. Furthermore, the provision of the second sealing member 52 between the adapter 42 and the mounting portion 411 is simple and easy to implement, reducing the sealing difficulty and improving the sealing effect.

[0130] For example, an annular recessed groove may be provided on at least one of the adapter 42 and the mounting portion 411 , and the second seal 52 may be embedded in the recessed groove to enhance the installation stability of the second seal 52 and enhance the sealing reliability of the mating position between the adapter 42 and the mounting portion 411 .

[0131] In some embodiments of the present application, as shown in FIG4 and FIG7 , the support portion 421 includes an end plate portion 4213 and a surrounding plate portion 4214. The surrounding plate portion 4214 is disposed around the first through-hole 1111. The end plate portion 4213 is connected to the end of the surrounding plate portion 4214 away from the first wall 111. The mounting portion 411 is supported on the side of the end plate portion 4213 away from the first wall 111. The second through-hole 4211 passes through the end plate portion 4213. A relief cavity 4215 open toward the first wall 111 is formed between the end plate portion 4213 and the surrounding plate portion 4214. The relief cavity 4215 connects the first through-hole 1111 and the second through-hole 4211. The cross-sectional area of ​​the relief cavity 4215 is greater than the cross-sectional area of ​​the second through-hole 4211. The cross-sectional area of ​​the relief cavity 4215 and the cross-sectional area of ​​the second through-hole 4211 are both obtained by cutting the relief cavity 4215 and the cross-sectional area of ​​the second through-hole 4211 along a plane perpendicular to the axis of the first through-hole 1111. Thus, the adapter 42 can be formed in the form of a cover rather than a solid block, which can achieve weight reduction and cost reduction.

[0132] Of course, the present application is not limited to this. In other embodiments of the present application, the adapter 42 can also be set to the form of a solid block, and a through hole 4216 can be set on the adapter 42. Referring to Figures 12 and 16, the through hole 4216 is formed on the side surface of the adapter 42 away from the first wall 111 to form a second through hole 4211, thereby simplifying the structure of the adapter 42, facilitating the processing of the adapter 42, and helping to improve the supporting strength of the adapter 42.

[0133] In some embodiments of the present application, as shown in Figures 4 and 7, the enclosure portion 4214 includes a first enclosure segment 42141 and a second enclosure segment 42142 arranged in sequence from the end plate portion 4213 to the first wall 111. The wall thickness of the first enclosure segment 42141 gradually decreases along the direction from the end plate portion 4213 to the first wall 111, and the wall thickness of the second enclosure segment 42142 is greater than the wall thickness of the first enclosure segment 42141 at the end close to the first wall 111.

[0134] As a result, the first enclosure portion 4214 gradually thickens in the direction toward the end plate portion 4213, which can improve the connection strength between the enclosure portion 4214 and the end plate portion 4213, and improve the support stability of the enclosure portion 4214 to the end plate portion 4213. By setting the wall thickness of the second enclosure section 42142 to be greater than the wall thickness of the end of the first enclosure section 42141 close to the first wall 111, the stability of the enclosure portion 4214 supported on the first wall 111 can be improved, thereby improving the support stability of the adapter 42 to the docking plug 41, so that the connector 41 can be stably electrically connected to the plug-in structure of the electrical device, thereby improving the stability and reliability of the battery 100 in supplying power to the electrical device. In addition, when a groove 4212 for embedding the first seal 51 is formed on the enclosure portion 4214, setting the wall thickness of the second enclosure section 42142 to be larger is beneficial to increasing the groove width of the groove 4212 and improving the thickness of the first seal 51, thereby helping to improve the sealing performance of the adapter 42 and the box assembly 1.

[0135] In some embodiments of the present application, as shown in Figures 4 and 6, the adapter 42 is entirely located outside the first wall 111 (i.e., on the side away from the interior of the box assembly 1). Therefore, by placing the adapter 42 entirely outside the box assembly 1, the adapter 42 can be installed, replaced, etc. directly from the outside of the box assembly 1, thereby facilitating assembly and disassembly of the adapter 42. In addition, the adapter 42 does not occupy space inside the box assembly 1, which helps to ensure the capacity of the battery 100.

[0136] Exemplarily, as shown in Figures 4 and 6, the adapter 42 includes a supporting portion 421 and a connecting portion 422. The supporting portion 421 is arranged between the mounting portion 411 and the first wall 111, and the connecting portion 422 is located on the periphery of the supporting portion 421 and is used to connect to the first wall 111. When the adapter 42 is located as a whole on the outside of the first wall 111, the supporting portion 421 and the connecting portion 422 are both located on the outside of the first wall 111.

[0137] In the embodiments of the present application, the connection relationship and installation order among the adapter 42, the box assembly 1 and the connector 41 are not limited. For example, the adapter 42 can be installed on the box assembly 1 first, and then the connector 41 can be installed on the adapter 42. For another example, the adapter 42 can be installed on the connector 41 first, and then the connector 41 can be installed on the box assembly 1. For another example, the adapter 42 and the connector 41 can be installed separately on the box assembly 1, and so on.

[0138] In some embodiments of the present application, as shown in Figures 4 and 7, the connector 41 is connected to the adapter 42, and the adapter 42 is connected to the first wall 111. This helps improve the connection reliability between the connector 41 and the adapter 42, and helps improve the connection reliability between the adapter 42 and the first wall 111, thereby improving the reliability of the installation of the connector assembly 4 in the box assembly 1. The connection between the connector 41 and the adapter 42 can be a detachable connection, such as a threaded connection, or a non-detachable connection, such as a riveted connection. The connection between the adapter 42 and the first wall 111 can be a detachable connection, such as a threaded connection, or a non-detachable connection, such as a riveted connection. When a detachable connection is selected, the adapter 42 is easily replaced. When a non-detachable connection is selected, the sealing and reliability of the connection are improved.

[0139] For example, the assembly of the connector 41 and the adapter 42 is not affected by whether the adapter 42 is connected to the first wall 111 or not. In other words, the assembly of the connector 41 and the adapter 42 can be performed regardless of whether the adapter 42 is connected to the first wall 111 or disconnected, thereby providing flexibility in the installation sequence. For example, the connector 41 and the adapter 42 can be connected to form an assembly, and then the assembly can be installed in the box assembly 1. For another example, the adapter 42 can be installed on the first wall 111 first, and then the connector 41 can be installed on the adapter 42, thereby improving assembly flexibility.

[0140] For example, when the connector 41 is connected to the adapter 42, and the adapter 42 is connected to the first wall 111, the adapter 42 can be completely located outside the box assembly 1 to facilitate assembly of the adapter 42 and the first wall 111. However, the present application is not limited thereto. In some other specific examples of this embodiment, when the connector 41 is connected to the adapter 42, and the adapter 42 is connected to the first wall 111, the adapter 42 can also partially extend into the box assembly 1, for example, partially extend into the box assembly 1 through the first through-hole 1111, to increase design flexibility.

[0141] In some embodiments of the present application, as shown in Figures 4, 6 and 7, the adapter 42 includes a support portion 421, which is arranged between the first wall 111 and the mounting portion 411 to support the mounting portion 411, and the mounting portion 411 is connected to the support portion 421.

[0142] Thus, because the adapter 42 includes the support portion 421 disposed between the first wall 111 and the mounting portion 411, and the support portion 421 is disposed corresponding to the mounting portion 411, the support portion 421 provides more reliable and stable support for the connector 41. Furthermore, by utilizing the position where the adapter 42 supports the connector 41 and connects to the connector 41, the difficulty of connecting the adapter 42 to the connector 41 can be reduced, simplifying the structural design.

[0143] Exemplarily, the mounting portion 411 is connected to the support portion 421 through a first connecting member 61, which includes a first rod portion 611 and a first head portion 612, the first head portion 612 abuts against the side of the mounting portion 411 away from the support portion 421, and the first rod portion 611 passes through the mounting portion 411 and is connected to the support portion 421.

[0144] For example, the first connecting member 61 may be a threaded fastener or a rivet, etc., which extends into the mounting portion 411 and the support portion 421 along a direction from the outside of the first wall 111 to the inside of the first wall 111, thereby connecting the mounting portion 411 to the support portion 421. For example, when the first connecting member 61 is a threaded fastener (such as a screw or a bolt), the support portion 421 may be provided with a threaded hole, or embedded with a nut or an external nut, etc. to achieve connection. When the first connecting member 61 is a rivet, connection may be achieved by means of riveting, etc.

[0145] Thus, the connector 41 and the adapter 42 can be assembled from the outside, which improves the convenience of assembly. Moreover, the adapter 42 and the connector 41 can be installed before the adapter 42 is connected to the first wall 111, or the adapter 42 and the connector 41 can be installed after the adapter 42 is connected to the first wall 111, thereby making the assembly steps flexible.

[0146] In some embodiments of the present application, as shown in Figures 4, 6, 8 and 9, the adapter 42 also includes a connecting portion 422, which is located on the periphery of the support portion 421 and exceeds the coverage range of the mounting portion 411, and the connecting portion 422 is connected to the first wall 111.

[0147] Therefore, since the adapter 42 also includes a connecting portion 422 located outside the supporting portion 421, and the connecting portion 422 exceeds the coverage range of the mounting portion 411, the connection position of the connecting portion 422 and the first wall 111 can be staggered with the connection position of the supporting portion 421 and the mounting portion 411, so that the connection of the connecting portion 422 and the first wall 111 does not affect the support and connection of the mounting portion 411 by the supporting portion 421, so that there is no order requirement for the connection steps of the mounting portion 411 and the supporting portion 421, and the connection steps of the connecting portion 422 and the first wall 111, and the order can be selected according to actual needs, such as the mounting portion 411 and the supporting portion 421 can be connected first, and then the first wall 111 and the connecting portion 422 can be connected, or the first wall 111 and the connecting portion 422 can be connected first, and then the mounting portion 411 and the support portion 421 can be connected, so that the assembly is flexible.

[0148] Exemplarily, as shown in Figures 4, 6 and 9, the connecting portion 422 is connected to the first wall 111 through a second connecting member 62, and the second connecting member 62 includes a second rod portion 621 and a second head portion 622, the second head portion 622 abuts against the side of the connecting portion 422 away from the first wall 111, and the second rod portion 621 passes through the connecting portion 422 and is connected to the first wall 111.

[0149] For example, the second connecting member 62 may be a threaded fastener or a rivet, etc., which extends into the connecting portion 422 and the first wall 111 along a direction from the outside of the first wall 111 to the inside of the first wall 111, thereby connecting the connecting portion 422 to the first wall 111. For example, when the second connecting member 62 is a threaded fastener (such as a screw or a bolt), the first wall 111 may be provided with a threaded hole, or an embedded nut or an external nut to achieve connection. When the second connecting member 62 is a rivet, connection may be achieved by means of riveting or the like.

[0150] Thus, the adapter 42 and the box assembly 1 can be assembled from the outside, which improves the convenience of assembly. Moreover, the adapter 42 and the box assembly 1 can be installed before the adapter 42 and the connector 41, or the adapter 42 and the box assembly 1 can be installed after the adapter 42 and the connector 41 are connected, thereby making the assembly steps flexible.

[0151] In some embodiments of the present application, as shown in Figures 4 and 6 , the adapter 42 further includes a reinforcing rib 423 connected between the support portion 421 and the connection portion 422. This improves the structural strength of the adapter 42, thereby increasing both the connection reliability between the adapter 42 and the first wall 111 and the support reliability of the adapter 42 in connecting with the plug 41.

[0152] Of course, the present application is not limited thereto, and when the adapter 42 does not include the connecting portion 422 located around the support portion 421, the connection between the adapter 42 and the box assembly 1 can also be achieved. For example, in some other embodiments of the present application, as shown in Figures 10 to 13, the support portion 421 is connected to the first wall 111 via a third connecting member 63. The third connecting member 63 includes a third rod portion 631 and a third head portion 632. The third head portion 632 abuts against the inner side of the first wall 111, and the third rod portion 631 passes through the first wall 111 and is connected to the support portion 421.

[0153] For example, the third connecting member 63 may be a threaded fastener or a rivet, etc., extending into the first wall 111 and the support portion 421 along a direction from the inner side of the first wall 111 to the outer side of the first wall 111, thereby connecting the support portion 421 to the first wall 111. For example, when the third connecting member 63 is a threaded fastener (such as a screw or a bolt), the support portion 421 may be provided with a threaded hole, or embedded with a nut or an external nut, etc. to achieve connection. When the third connecting member 632 is a rivet, connection may be achieved by means of riveting, etc.

[0154] Thus, the adapter 42 can be assembled with the box assembly 1 from the inside, and the adapter 42 does not need to be provided with a connecting portion 422 located around the support portion 421, thereby reducing the volume and space occupied by the adapter 42. In addition, when the mounting portion 411 and the support portion 421 are connected via the first connecting member 61, the adapter 42 can be installed with the box assembly 1 before the adapter 42 and the connector 41, or after the adapter 42 and the connector 41 are connected, thereby making the assembly steps flexible. When the adapter 42 is connected to the first wall 111, only the adapter 42 and the first wall 111 need to be aligned. When the adapter 42 is connected to the connector 41, only the adapter 42 and the connector 41 need to be aligned, thereby reducing the difficulty of assembly and further improving assembly efficiency.

[0155] Exemplarily, when the mounting portion 411 is connected to the supporting portion 421, and the supporting portion 421 is connected to the first wall 111 through the above-mentioned third connecting member 63, the connection position of the supporting portion 421 and the mounting portion 411 and the connection position of the supporting portion 421 and the first wall 111 are staggered, for example, the above-mentioned first connecting member 61 and the third connecting member 63 are not directly opposite.

[0156] Thus, when the wall thickness of the support portion 421 is relatively thin, by staggering the two connection positions, the wall thickness at different positions of the support portion 421 can be utilized to meet the connection requirements. Of course, if the wall thickness of the support portion 421 is sufficient, the two connection positions can also be set to correspond, or the two connection positions can be staggered, thereby achieving flexible design.

[0157] Furthermore, the present application is not limited to the adapter 42 being individually connected to the connector 41 and the first wall 111. For example, in other embodiments of the present application, as shown in Figures 14-17, the connector 41, the adapter 42, and the first wall 111 may be connected together via a fourth connector 64. In other words, the fourth connector 64 simultaneously connects the connector 41, the adapter 42, and the first wall 111. Consequently, the adapter 42 does not need to be provided with a connecting portion 422 located around the support portion 421, thereby reducing the size and space occupied by the adapter 42, and saving the number of connectors used, thereby lowering costs.

[0158] Exemplarily, as shown in Figures 14 to 17, the fourth connecting member 64 includes a fourth rod portion 641 and a fourth head portion 642, the fourth head portion 642 abuts against the side of the mounting portion 411 away from the adapter 42, and the fourth rod portion 641 passes through the mounting portion 411 and the adapter 42 and is connected to the first wall 111.

[0159] For example, the fourth connecting member 64 can be a threaded fastener or a rivet, extending from the outside of the first wall 111 to the inside of the first wall 111 into the mounting portion 411, the support portion 421, and the first wall 111, thereby connecting the connector 41, the adapter 42, and the first wall 111. Thus, the connector assembly 4 and the box assembly 1 can be assembled from the outside, improving assembly convenience. For example, when the fourth connecting member 64 is a threaded fastener (such as a screw or bolt), the first wall 111 can be provided with a threaded hole, or an embedded nut or an external nut can be provided to achieve connection. When the fourth connecting member 64 is a rivet, connection can be achieved by riveting or other methods.

[0160] In addition, in the present application, when the scheme of connecting the adapter 42 to the connector 41 and the first wall 111 separately or connecting the connector 41, the adapter 42 and the first wall 111 together is not selected, a scheme of connecting the adapter 42 to the connector 41 and the connector 41 to the first wall 111 can also be adopted, that is, the connector 41 to the adapter 42 and the first wall 111 are separately connected.

[0161] For example, the adapter 42 can be first installed on the connector 41, and then the connector 41 can be installed on the first wall 111, which facilitates flexible installation of the adapter 42. It is worth noting that the adapter 42 and the connector 41 can be connected in any manner, for example, they can be connected by a connector, or by snap-fitting, bonding, etc.

[0162] It should be noted that the wall thickness of the support portion 421 is not limited and can be specifically set according to the situation (i.e., the protruding position of the connector 41 relative to the housing assembly 1). For example, in some embodiments, referring to Figures 11 and 12 , in the axial direction F of the first through-hole 1111, the distance W between the mounting portion 411 and the first wall 111 is greater than the wall thickness D of the mounting portion 411. This relatively large distance between the mounting portion 411 and the first wall 111 cannot be solved with a conventional gasket, making it more convenient to design an adapter 42 that takes into account both support strength and sealing requirements.

[0163] In some embodiments of the present application, as shown in FIG3 , the housing assembly 1 includes a housing 11 that is an integrally stamped part, and the housing 11 includes a bottom wall 11a and a surrounding wall 11b, with one side wall of the surrounding wall 11b constituting a first wall 111. For example, the housing 11 can be made of sheet metal and stamped into a basin shape to include the bottom wall 11a and the surrounding wall 11b. Thus, since the bottom wall 11a and the surrounding wall 11b of the housing 11 are integrally stamped, there is no need to consider sealing issues at the connection between the bottom wall 11a and the surrounding wall 11b, and the sealing effect can be ensured. This can prevent muddy water from seeping into the housing 11 from the connection between the bottom wall 11a and the surrounding wall 11b and affecting the battery cell assembly 2, thereby improving the reliability of the battery 100. Moreover, the integrally stamped housing 11 does not require splicing, which can improve production efficiency. In addition, arranging the connector 41 on the side of the housing assembly 1, rather than on the bottom or top surface, helps reduce the difficulty of connecting the connector 41 to the plug-in structure on the electrical device.

[0164] In some embodiments of the present application, as shown in FIG. 2 and FIG. 21 , a heat exchange element 31 is provided on the bottom wall 11 a of the box body 11 , and the heat exchange element 31 is arranged to exchange heat with the battery cell assembly 2 in the box body 11 .

[0165] In this embodiment, the box body 11 is an integral stamped part and includes a bottom wall 11a and a surrounding wall 11b. The heat exchange element 31 is laid on the bottom wall 11a, for example, on the upper surface of the bottom wall 11a (for example, the embodiment shown in Figure 2), or on the lower surface of the bottom wall 11a (for example, the embodiment shown in Figure 21). 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.

[0166] In some embodiments of the present application, as shown in Figures 21-23, 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.

[0167] 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.

[0168] Exemplarily, heat exchange tube 312 is a flat tube structure. Referring to Figures 18 and 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, i.e., two layers of plate brazed together to form a heat exchange channel between the two layers. Exemplarily, the flat tube can be formed by splicing together multiple sections of extruded tube. The thickness of the flat tube can be much smaller than that of the 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.

[0169] In some embodiments of the present application, as shown in FIG21 , the housing assembly 1 includes a bottom guard plate 14 located below the housing 11, and the heat exchanger 31 is located outside the housing 11 and between the bottom wall 11a of the housing 11 and the bottom guard plate 14. Thus, by placing the heat exchanger 31 outside the housing 11, there is no need to consider the insulation between the heat exchanger 31 and the battery cells 11 within the housing 11, thereby simplifying the insulation design of the heat exchanger 31, reducing processing difficulty and production costs, solving the short circuit problem between the battery cell assembly 2 and the heat exchanger 31, and improving the reliability of the battery 100. Furthermore, by placing the heat exchanger 31 outside the housing 11, the heat exchanger 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 exchanger 31, thereby better ensuring the capacity of the battery 100. Moreover, by arranging the heat exchanger 31 below the bottom wall 11a 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 14 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.

[0170] In some embodiments of the present application, as shown in Figures 21 and 23, the heat exchanger 31 is connected to the current collector 32 via a connecting tube 36 that passes through the bottom wall 11a. Thus, by placing the current collector 32 inside the housing 11 and 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. This eliminates 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 11a to directly connect to the current collector 32 within the housing 11.

[0171] In some embodiments of the present application, as shown in FIG23 , 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.

[0172] In some embodiments of the present application, as shown in FIG23 , 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.

[0173] In some embodiments of the present application, as shown in Figures 21 and 23, the box assembly 1 also includes: a seal 18, which is sealed between the bottom wall 11a and the bottom guard plate 14, and includes an outer peripheral portion 181 arranged around the heat exchanger 31, and the connecting pipe 36 passes through the bottom wall 11a in the inner ring area corresponding to the outer peripheral portion 181.

[0174] Thus, by positioning the connection tube 36 through the bottom wall 11a within the area surrounded by the outer peripheral portion 181, when the outer peripheral portion 181 is sealed between the bottom wall 11a and the bottom guard plate 14, muddy water, particulate matter, and the like outside the case assembly 1 are unlikely to pass through the outer peripheral portion 181 and enter between the bottom wall 11a and the bottom guard plate 14, and then flow to the location where the connection tube 36 passes through the bottom wall 11a and enter the case 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 case assembly 1 are unlikely to pass through the outer peripheral portion 181 and enter between the bottom wall 11a and the bottom guard plate 14, thereby contaminating or corroding the heat exchange element 31 between the bottom wall 11a and the bottom guard plate 14, thereby improving the reliability and service life of the heat exchange element 31.

[0175] In some embodiments of the present application, as shown in Figures 21 and 23, a primer layer 19 is provided between the heat exchanger 31 and the bottom wall 11a and the bottom guard plate 14, respectively. Specifically, the surface of the heat exchanger 31 facing the bottom wall 11a is fixedly connected to the bottom wall 11a via the primer layer 19, and the surface of the heat exchanger 31 facing the bottom guard plate 14 is also fixedly connected to the bottom guard plate 14 via the primer layer 19. This improves the stability of heat transfer between the heat exchanger 31 and the bottom wall 11a, and enhances 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, the primer layer 19 can be applied to both sides of the heat exchanger 31, or to the side of the bottom wall 11a facing the heat exchanger 31, or to the side of the bottom guard plate 14 facing the heat exchanger 31. For example, the primer layer 19 can be structural adhesive, highly thermally conductive double-sided tape, or the like.

[0176] In some embodiments of the present application, as shown in Figures 21 and 23, 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 11a and the bottom guard plate 14, 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.

[0177] Therefore, the foam part 17 can be used to fill the space between the bottom wall 11a and the bottom guard plate 14 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 11a and the bottom guard plate 14. 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 14 impacting the heat exchange part 31 or the box body 11, thereby protecting the heat exchange part 31 and the battery core 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.

[0178] In some embodiments of the present application, as shown in Figures 21 and 23, the foam part 17 is connected to the bottom guard plate 14, and the upper surface of the heat exchange part 31 is higher than the upper surface of the foam part 17. That is, the side surface of the heat exchange part 31 facing the bottom wall 11a is arranged closer to the bottom wall 11a than the side surface of the foam part 17 facing the bottom wall 11a. As a result, the molding difficulty of the foam part 17 can be reduced, and it is beneficial to control the thickness uniformity of the foam part 17, so that the setting of the foam part 17 will not interfere with the heat transfer coordination between the heat exchange part 31 and the bottom wall 11a, thereby improving the stability and reliability of the heat transfer between the heat exchange part 31 and the bottom wall 11a, which is beneficial to improving the temperature regulation effect of the battery cell assembly 2, and further improving the working reliability of the battery 100.

[0179] In addition, when a bottom glue layer 19 is provided between the heat exchanger 31 and the bottom wall 11a, the foam part 17 is set to be connected to the bottom guard plate 14, which is conducive to reducing the difficulty of setting the bottom glue layer 19 between the heat exchanger 31 and the bottom wall 11a, and is conducive to improving the uniformity of the bottom glue layer 19 provided between the heat exchanger 31 and the bottom wall 11a, thereby improving the stability and reliability of heat transfer between the heat exchanger 31 and the bottom wall 11a, and is conducive to improving the temperature regulation effect of the battery cell assembly 2, thereby improving the working reliability of the battery 100.

[0180] For example, the foam part 17 can be processed on the bottom guard plate 14 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 exchange part 31 or the bottom wall 11a, and then the heat exchange part 31 is installed between the protective plate 13 with the foam part 17 and the bottom wall 11a. When the heat exchange part 31 protrudes toward the bottom wall 11a relative to the foam part 17, the stability and reliability of the heat transfer cooperation between the heat exchange part 31 and the bottom wall 11a can be guaranteed.

[0181] In other embodiments of the present application, the bottom guard plate 14, 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 14 and the bottom wall 11a 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 11a 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.

[0182] It is worth noting that the composition and material of the bottom guard plate 14 are not limited. For example, the bottom guard plate 14 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 14 can also be composed of a combination of multi-layer plates. For example, in conjunction with Figure 21, the bottom guard plate 14 includes a first guard plate 141 and a second guard plate 142, and the second guard plate 142 is located below the first guard plate 141. The first guard plate 141 can be made of metal, and the second guard plate 142 can be made of a corrosion-resistant material, such as PVC (abbreviation of polyvinyl chloride).

[0183] In some embodiments of the present application, as shown in Figures 22 and 24 , the heat exchange element 31 includes at least one first heat exchange channel 3110. For example, the heat exchange channel 311 defined in at least one heat exchange tube 312 is the first heat exchange channel 3110.

[0184] 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.

[0185] 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.

[0186] 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 a part of the first U-shaped area Z1 formed by the outer second heat exchange section 3112 can be opposite to the outer battery cell 21 of the battery 100, so that the second heat exchange section 3112 can be Heat exchange is performed 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 compensate for the internal and external temperature difference caused by the heat exchange between at least part of the battery cells 21 on the periphery and the environment, so that the heat exchange effect of the battery cells 21 on the periphery of the battery cell assembly 2 and the battery cells 21 inside the battery cell assembly 2 tend 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.

[0187] 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.

[0188] 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.

[0189] In some embodiments of the present application, as shown in Figures 2 and 24, 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.

[0190] 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.

[0191] In some embodiments, referring to Figures 24 and 25 , 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.

[0192] In some embodiments, referring to Figures 24 and 25 , 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.

[0193] In some embodiments, in combination with Figures 25 and 26, 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.

[0194] For example, the embodiment of Figure 25 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 26 shows one of the matching methods of a first heat exchange channel 3110 and two second heat exchange channels 3114.

[0195] 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.

[0196] In some embodiments, referring to FIG. 26 , 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 .

[0197] For example, Figure 26 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.

[0198] 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.

[0199] In some embodiments of the present application, as shown in Figures 18 and 19, a housing assembly 1 includes a housing 11, a battery 100 includes a cell assembly 2 disposed within the housing 11, the cell assembly 2 includes a plurality of battery cells 21, and the battery 100 includes a thermostat 7, which includes at least one of a first thermostat 71, a second thermostat 72, and a third thermostat 73. The first thermostat 71 is disposed outside the housing 11 and abuts against the outer wall of the housing 11. The second thermostat 72 is disposed within the housing 11 and is located between the cell assembly 2 and the housing assembly 1. The third thermostat 73 is disposed within the housing 11 and is located between adjacent battery cells 21.

[0200] For example, the battery 100 may include only one of the first thermostat 71, the second thermostat 72, and the third thermostat 73; may include two of the first thermostat 71, the second thermostat 72, and the third thermostat 73; or may include all three of the first thermostat 71, the second thermostat 72, and the third thermostat 73. Thus, the thermostat 7 may be positioned appropriately based on actual conditions to meet the temperature regulation requirements of the battery 100.

[0201] The specific location of the first thermostat 71 outside the box 11 is not limited. For example, with reference to FIG18 , at least a portion of the first thermostat 71 can be located below the bottom wall 11 a of the box 11, thereby allowing for a wider range of heat exchange with the battery cell assembly 2 and improving the temperature control effect on the battery cell assembly 2. For another example, at least a portion of the first thermostat 71 can also be located outside the surrounding wall 11 b of the box 11.

[0202] Exemplarily, as shown in Figure 18, the box assembly 1 can also include a bottom guard plate 14 located below the bottom wall 11a of the box 11 to protect the box 11 from bumps and other factors. At this time, if a first temperature control component 71 is provided below the bottom wall 11a of the box 11, the first temperature control component 71 can be located between the bottom guard plate 14 and the bottom wall 11a of the box 11, so that the bottom guard plate 14 can also protect the first temperature control component 71.

[0203] The specific location of the second thermostat 72 within the box assembly 1 is not limited. For example, with reference to FIG18 , at least a portion of the second thermostat 72 can be located above the bottom wall 11a of the box 11, so as to be sandwiched between the bottom wall 11a of the box 11 and the bottom of the battery cell assembly 2. This allows for a wider range of heat exchange with the battery cell assembly 2, thereby improving the temperature control effect on the battery cell assembly 2. For another example, at least a portion of the second thermostat 72 can be located below the box cover 12, so as to be sandwiched between the box cover 12 and the top of the battery cell assembly 2. This allows for a wider range of heat exchange with the battery cell assembly 2, thereby improving the temperature control effect on the battery cell assembly 2.

[0204] The specific setting position of the third temperature regulating component 73 in the box assembly 1 is not limited. For example, in combination with Figure 19, the adjacent battery cells 21 in the battery cell assembly 2 can be opposite to each other in terms of large surfaces. The third temperature regulating component 73 is set between the large surfaces of adjacent battery cells 21, which can improve the temperature regulating effect of the battery cells 21.

[0205] Exemplarily, in combination with Figure 18, the temperature regulating element 7 can be a flat tube structure, that is, the temperature regulating element 7 is formed in the form of a flat tube with a width m greater than a thickness n. A flow channel can be formed in the flat tube, and a heat exchange liquid can be introduced into the flow channel to exchange heat with the battery cell assembly 2 to achieve a temperature regulating effect on the battery 100.

[0206] The heat exchanger used in the battery is usually a double-layer brazed plate structure, that is, it is made of two layers of plates brazed together to form a heat exchange channel between the two layers of plates. For example, the flat tube can be made by splicing multiple sections of extruded tubes. The thickness of the flat tube can be much smaller than the thickness of the double-layer brazed plate structure, so it can occupy less space and increase the capacity of the battery.

[0207] In addition, the thermal management system of the battery 100 is not limited to including only the above-mentioned temperature control component 7. For example, in some embodiments, in combination with Figure 20, the box assembly 1 may also include an expansion beam 13 arranged in the box 11. For example, there may be multiple expansion beams 13, and the battery cell assembly 2 is clamped between the multiple expansion beams 13. For example, it may include a first expansion beam 131 and a second expansion beam 132. The battery cell assembly 2 is clamped between the first expansion beam 131 and the second expansion beam 132. A heat exchange flow channel may be set in the expansion beam 13 for temperature control, thereby constituting a part of the thermal management system.

[0208] According to a third 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.

[0209] The following describes the battery 100 according to three specific embodiments of the present application.

[0210] Example 1

[0211] 2-9 , the battery 100 includes: a box assembly 1, a cell assembly 2 and a connector assembly 4, wherein the box assembly 1 includes: a box body 11, a box cover 12 and a bottom guard plate 14, the box body 11 is an integral stamped part and includes a bottom wall 11a and a surrounding wall 11b to form a stamped box shape with an open top, the cell assembly 2 is arranged in the box body 11, the connector assembly 4 is mounted on the surrounding wall 11b and is electrically connected to the cell assembly 2, the box cover 12 is arranged on the top of the box body 11, and the bottom guard plate 14 is arranged below the bottom wall 11a to protect the box body 11.

[0212] Referring to Figure 20 , a first expansion beam 131 is provided within the box 11, extending along a first direction X. The two opposing walls of the surrounding wall 11b in a second direction Y are a first wall 111 and a second wall 112, respectively. The space within the box 11 between the first expansion beam 131 and the first wall 111 is a first space 113, and the space within the box 11 between the first expansion beam 131 and the second wall 112 is a second space 114. The battery cell assembly 2 is disposed within the second space 114 and abuts the first expansion beam 131. The first space 113 is used to house high-voltage electrical equipment, etc. It is worth noting that the first direction X and the second direction Y are perpendicular, with one being the length of the box 11 and the other being the width. The height of the box 11 is a third direction Z, which is perpendicular to the first and second directions X and Y and is the spacing between the bottom wall 11a of the box 11 and the box cover 12.

[0213] The first wall 111 has a first through-hole 1111. The connector assembly 4 includes a connector 41 and an adapter 42. The connector 41 includes a mounting portion 411 and an electrical connection portion 412. The mounting portion 411 is located outside the first wall 111. The electrical connection portion 412 includes an external electrical terminal 4121 located on a side of the mounting portion 411 away from the first wall 111, and an internal electrical terminal 4122 located on a side of the mounting portion 411 closer to the interior of the box assembly 1. The internal electrical terminal 4122 is arranged corresponding to the first through-hole 1111. The adapter 42 is located outside the box assembly 1 and includes a supporting portion 421 and a connecting portion 422. The supporting portion 421 is located between the first wall 111 and the mounting portion 411 to support the mounting portion 411 and space it apart from the first wall 111. The connecting portion 422 is located outside the supporting portion 421 and connected to the first wall 111.

[0214] The support portion 421 includes an end plate portion 4213 and a surrounding plate portion 4214. The surrounding plate portion 4214 is arranged around the first through-hole 1111. The end plate portion 4213 is connected to the end of the surrounding plate portion 4214 away from the first wall 111. The mounting portion 411 is supported on the side of the end plate portion 4213 away from the first wall 111. A second through-hole 4211 is formed through the end plate portion 4213. A relief cavity 4215 open toward the first wall 111 is formed between the end plate portion 4213 and the surrounding plate portion 4214. The second through-hole 4211 is provided corresponding to the first through-hole 1111, and the relief cavity 4215 connects the first through-hole 1111 and the second through-hole 4211. The power connection portion 412 is provided through the second through-hole 4211. A first sealing member 51 is provided between the surrounding plate portion 4214 and the first wall 111, and is arranged around the first through-hole 1111. A second sealing member 52 is disposed between the supporting portion 421 and the mounting portion 411 . The second sealing member 52 is disposed around the second through hole 4211 .

[0215] The mounting portion 411 is connected to the support portion 421 via a first connector 61. The first connector 61 includes a first rod 611 and a first head 612. The first head 612 abuts the side of the mounting portion 411 away from the support portion 421. The first rod 611 passes through the mounting portion 411 and is connected to the support portion 421. The adapter 42 also includes a connecting portion 422. The connecting portion 422 is located outside the support portion 421 and extends beyond the coverage of the mounting portion 411. The connecting portion 422 is connected to the first wall 111. The connecting portion 422 is connected to the first wall 111 via a second connector 62. The second connector 62 includes a second rod 621 and a second head 622. The second head 622 abuts the side of the connecting portion 422 away from the first wall 111. The second rod 621 passes through the connecting portion 422 and is connected to the first wall 111.

[0216] For example, during assembly, the adapter 42 is first set on the outside of the box assembly 1, and then the second connecting member 62 (such as a screw) can be driven in from the outside to the inside to first fix the adapter 42 on the box assembly 1, and then the connector 41 is fitted on the outside of the adapter 42, and then the first connecting member 61 (such as a screw) is driven in from the outside to the inside to fix the connector 41 on the adapter 42, thereby completing the installation of the connector assembly 4.

[0217] Example 2

[0218] The adapter 42 of the second embodiment differs from that of the first embodiment, and differs in its connection method with the connector 41 and the housing assembly 1. In the second embodiment, referring to Figures 10-13 , the adapter 42 includes a support portion 421 but does not include a connection portion 422. A through-hole 4216 is provided through the support portion 421. The through-hole 4216 corresponds to the first through-hole 1111, and the opening formed on the side of the support portion 421 away from the first wall 111 constitutes the second through-hole 4211. This simplifies the structure of the adapter 42, facilitates its processing, and improves its support strength.

[0219] The mounting portion 411 and the support portion 421 are connected via a first connector 61. The first connector 61 includes a first rod 611 and a first head 612. The first head 612 abuts against a side of the mounting portion 411 away from the support portion 421. The first rod 611 passes through the mounting portion 411 and is connected to the support portion 421. The support portion 421 is connected to the first wall 111 via a third connector 63. The third connector 63 includes a third rod 631 and a third head 632. The third head 632 abuts against the inner side of the first wall 111. The third rod 631 passes through the first wall 111 and is connected to the support portion 421. The first connector 61 and the third connector 63 are staggered.

[0220] For example, during assembly, the adapter 42 is first positioned outside the housing assembly 1. The third connector 63 (e.g., a screw) is then driven in from the inside out to secure the adapter 42 to the housing assembly 1. The connector 41 is then fitted onto the outside of the adapter 42. The first connector 61 (e.g., a screw) is then driven in from the outside in to secure the connector 41 to the adapter 42, thereby completing the installation of the connector assembly 4. This reduces the space occupied by the adapter 42 and enables the separate connection of the adapter 42 to the housing assembly 1 and the separate connection of the adapter 42 to the connector 41, thereby improving the assembly efficiency of the connector assembly 4.

[0221] Example 3

[0222] The adapter 42 of the third embodiment differs from that of the first embodiment, and differs in its connection method with the connector 41 and the housing assembly 1. In the third embodiment, referring to Figures 14-17 , the adapter 42 includes a support portion 421 but does not include a connection portion 422. A through-hole 4216 is provided through the support portion 421. The through-hole 4216 corresponds to the first through-hole 1111, and the opening formed on the side of the support portion 421 away from the first wall 111 constitutes the second through-hole 4211. This simplifies the structure of the adapter 42, facilitates its processing, and improves its support strength. The connector 41, the adapter 42 and the first wall 111 are connected together through the fourth connecting member 64. The fourth connecting member 64 includes a fourth rod portion 641 and a fourth head portion 642. The fourth head portion 642 abuts against the side of the mounting portion 411 away from the adapter 42. The fourth rod portion 641 passes through the mounting portion 411 and the adapter 42 and is connected to the first wall 111.

[0223] For example, during assembly, the adapter 42 is first set on the outside of the box assembly 1, and the connector 41 is fitted on the outside of the adapter 42. Then the fourth connecting member 64 (such as a screw) can be driven in from the outside to the inside to fix the connector 41 and the adapter 42 together to the box assembly 1. In this way, the installation and fixation of the connector assembly 4 is achieved, and the space occupied by the adapter 42 is reduced.

[0224] 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.

[0225] 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: The box assembly includes a first wall having a first through hole; and A connector assembly is installed on the box assembly and includes a connector and an adapter. The connector includes a mounting portion and an electrical connection portion. The mounting portion is located on the outside of the first wall. The electrical connection portion includes an external electrical terminal located on a side of the mounting portion away from the first wall, and an internal electrical terminal located on a side of the mounting portion close to the inside of the box assembly. The internal electrical terminal is arranged corresponding to the first through-hole. At least a portion of the adapter is located outside the box assembly and supports the mounting portion so that the mounting portion is spaced apart from the first wall.

2. The battery according to claim 1, wherein The adapter includes a supporting portion, which is disposed between the first wall and the mounting portion to support the mounting portion.

3. The battery according to claim 2, wherein The supporting portion is disposed around the first through-hole, and a second through-hole corresponding to the first through-hole is formed on the supporting portion, and the power connection portion is disposed in the second through-hole.

4. The battery according to claim 3, wherein A first sealing member is provided between the supporting portion and the first wall, and the first sealing member is disposed around the first through-hole.

5. The battery according to claim 4, wherein An end surface of the support portion facing the first wall has an annular groove, and the first sealing member is embedded in the groove.

6. The battery according to any one of claims 3 to 5, wherein A second sealing member is provided between the supporting portion and the mounting portion, and the second sealing member is arranged around the second through-hole.

7. The battery according to any one of claims 3 to 6, wherein The supporting portion includes an end plate portion and a surrounding plate portion, the surrounding plate portion is arranged around the first through-hole, the end plate portion is connected to the end of the surrounding plate portion away from the first wall, the mounting portion is supported on the side of the end plate portion away from the first wall, the second through-hole passes through the end plate portion, and an avoidance cavity open toward the first wall is formed between the end plate portion and the surrounding plate portion, the avoidance cavity connects the first through-hole and the second through-hole, and the cross-sectional area of the avoidance cavity is larger than the cross-sectional area of the second through-hole.

8. The battery according to claim 7, wherein The enclosure portion includes a first enclosure section and a second enclosure section arranged in sequence from the end plate portion to the first wall. The wall thickness of the first enclosure section gradually decreases along the direction from the end plate portion to the first wall, and the wall thickness of the second enclosure section is greater than the wall thickness of the end portion of the first enclosure section close to the first wall.

9. The battery according to any one of claims 3 to 6, wherein A through hole is provided on the support portion, and the through hole is provided corresponding to the first through hole. An opening formed by the through hole on a side surface of the support portion away from the first wall constitutes the second through hole.

10. The battery according to any one of claims 1 to 9, wherein The adapter is entirely located outside the first wall.

11. The battery according to any one of claims 1 to 10, wherein The connector is connected to the adapter, and the adapter is connected to the first wall.

12. The battery according to claim 11, wherein The adapter includes a supporting portion, which is arranged between the first wall and the mounting portion to support the mounting portion, and the mounting portion is connected to the supporting portion.

13. The battery according to claim 12, wherein The mounting portion is connected to the support portion via a first connecting member, which includes a first rod portion and a first head portion. The first head portion abuts against a side of the mounting portion away from the support portion, and the first rod portion passes through the mounting portion and is connected to the support portion.

14. The battery according to claim 12 or 13, wherein The adapter also includes a connecting portion, which is located at the periphery of the supporting portion and exceeds the coverage range of the mounting portion, and is connected to the first wall.

15. The battery according to claim 14, wherein The connecting portion is connected to the first wall via a second connecting member, which includes a second rod portion and a second head portion. The second head portion abuts against a side of the connecting portion away from the first wall. The second rod portion passes through the connecting portion and is connected to the first wall.

16. The battery according to claim 14 or 15, wherein The adapter also includes a reinforcing oblique rib connected between the supporting portion and the connecting portion.

17. The battery according to claim 12 or 13, wherein The support portion is connected to the first wall via a third connecting member. The third connecting member includes a third rod portion and a third head portion. The third head portion abuts against the inner side of the first wall. The third rod portion passes through the first wall and is connected to the support portion.

18. The battery according to claim 17, wherein A connection position between the support portion and the mounting portion is staggered from a connection position between the support portion and the first wall.

19. The battery according to any one of claims 1 to 10, wherein The connector, the adapter and the first wall are connected together via a fourth connecting member.

20. The battery according to claim 19, wherein The fourth connecting member includes a fourth rod portion and a fourth head portion. The fourth head portion abuts against a side of the mounting portion away from the adapter. The fourth rod portion passes through the mounting portion and the adapter portion and is connected to the first wall.

21. The battery according to any one of claims 1 to 20, wherein In the axial direction of the first through hole, a distance between the mounting portion and the first wall is greater than a wall thickness of the mounting portion.

22. The battery according to any one of claims 1 to 21, wherein The box assembly includes a box, the battery includes a cell assembly disposed in the box, the cell assembly includes a plurality of battery cells, the battery includes a temperature regulating member, and the temperature regulating member 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 component is arranged outside the box and is in contact with the outer wall of the box; The second temperature regulating component is arranged in the box body and is located between the battery cell assembly and the box body assembly; The third temperature regulating component is disposed in the box and located between adjacent battery cells.

23. The battery according to any one of claims 1 to 22, wherein The box assembly includes a box body that is an integral stamped part, and the box body includes a bottom wall and a surrounding wall, wherein a side wall of the surrounding wall constitutes the first wall.

24. The battery according to claim 23, wherein The box body is provided with a battery core assembly, and the bottom wall of the box body is paved with a heat exchange component, which is arranged for heat exchange with the battery core assembly.

25. The battery according to claim 24, 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.

26. The battery according to claim 25, 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.

27. The battery according to claim 25 or 26, 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.

28. The battery according to claim 27, 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.

29. The battery according to any one of claims 24 to 28, 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.

30. An electrical device, wherein: Comprising a battery according to any one of claims 1-29.

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