Battery device, energy storage device, and power consumption device

Abstract

The application discloses a battery device, an energy storage device and a power utilization device, and relates to the technical field of battery devices. The battery device comprises a box body, a heat exchange device, a plurality of heat exchange modules arranged along a first direction, a heat exchange element, a current collector, a first connecting pipe and a second connecting pipe, the first connecting pipe comprises a first pipe part and a first clamping part, one end of the first pipe part extends into a fluid cavity, and the first clamping part is arranged at one end of the first pipe part; the second connecting pipe comprises a second pipe part and a second clamping part, one end of the second pipe part extends into the fluid cavity, and the second clamping part is arranged at one end of the second pipe part; and the first clamping part and the second clamping part are connected through clamping in the fluid cavity. In the technical scheme, the volume of aluminum ingots required for processing the current collector can be reduced, the loss of raw materials can be reduced, the machining process of the current collector can be reduced, the processing time and cost can be reduced, the development and design cost can be reduced, and the production efficiency can be further improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device, an energy storage device, and an electrical device. Background Technology

[0002] In the field of battery thermal management, the current collector structure of the harmonica tube water-cooled plate is integrally machined, requiring the water nozzle length and inner diameter to be customized according to the thickness of the battery cell. However, the integral machining mode of the current collector structure is limited by the length of the water nozzles at both ends, requiring the use of large-volume aluminum ingots as raw materials, resulting in significant raw material loss during machining. At the same time, the complex structure of the two water nozzles leads to numerous machining processes and low production efficiency, resulting in a high overall manufacturing cost for the harmonica tube water-cooled plate. Utility Model Content

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a battery device, and an energy storage device and an electrical device comprising this battery device. The battery device can reduce the volume of raw materials required for current collector processing, reduce the machining steps of the current collector, lower manufacturing costs, and improve production efficiency.

[0004] In a first aspect, embodiments of this application provide a battery device, comprising: a housing; a plurality of battery packs, the plurality of battery packs being spaced apart in the housing along a first direction, each battery pack including at least one battery cell; a heat exchange device, comprising a plurality of heat exchange modules arranged along the first direction, each heat exchange module including: a heat exchange element having a heat exchange channel, the heat exchange element being disposed between two adjacent battery packs and / or on at least one side of the plurality of battery packs in the first direction for heat exchange with the battery packs; a current collector connected to at least one end of the heat exchange element in a second direction, the current collector defining a fluid cavity communicating with the heat exchange channel, the current collector having a first interface and a second interface, the first interface and the second interface being respectively located on both sides of the current collector in the first direction, the first direction being perpendicular to the first battery pack. The heat exchange modules are arranged in two intersecting directions. A first connecting pipe includes a first tube section and a first retaining portion. The first tube section is tubular, extending along the first direction. One end of the first tube section passes through the first interface and extends into the fluid cavity, communicating with the fluid cavity. The first retaining portion is located at the first end of the first tube section. A second connecting pipe includes a second tube section and a second retaining portion. The second tube section is tubular, extending along the first direction. One end of the second tube section passes through the second interface and extends into the fluid cavity, communicating with the fluid cavity. The second retaining portion is located at the first end of the second tube section. The first retaining portion and the second retaining portion are engaged within the fluid cavity. In two adjacent heat exchange modules, the other end of the first connecting pipe of one heat exchange module is connected to the other end of the second connecting pipe of the other heat exchange module.

[0005] In the above technical solution, by detachably connecting one end of the first pipe and one end of the second pipe of the heat exchange module into the fluid cavity of the collector, the volume of raw materials required for collector processing can be reduced, material loss can be reduced, manufacturing costs can be lowered, machining steps for the collector can be reduced, and processing time and costs can be reduced. Furthermore, for collectors of the same thickness and diameter, the same first and second pipes can be used, thereby reducing development and design costs and further improving production efficiency. The first and second pipes are connected by a first and second locking part, achieving detachable connection of the first and second pipes within the fluid cavity without additional connectors. This enables rapid assembly of the first and second pipes, improving assembly efficiency and facilitating maintenance and disassembly. Additionally, the locking connection method has a simple and compact structure, reducing space occupation within the fluid cavity, minimizing obstruction to heat exchange fluid flow, reducing pressure loss of the heat exchange fluid, and ensuring the heat exchange efficiency of the heat exchange device.

[0006] In some embodiments, the first retaining portion includes a first extending arm and a first hook, the first extending arm extending along the first direction and connected between one end of the first tube and the first hook, the second retaining portion includes a second extending arm and a second hook, the second extending arm extending along the first direction and connected between one end of the second tube and the second hook, wherein the first hook and the second hook are located between the first extending arm and the second extending arm, and the first hook and the second hook abut against each other in the first direction to engage the first retaining portion and the second retaining portion.

[0007] In the above technical solution, by setting the first and second holding parts as cantilevered hook shapes, the structure of the first and second holding parts can be simplified, making it easier for the first and second connecting pipes to engage, making the engagement operation simple and convenient, and also ensuring the connection strength and reliability of the first and second holding parts, simplifying the structure and reducing costs.

[0008] In some embodiments, in the radial direction of the second tube, the second extension arm is located between the first extension arm and the peripheral wall of the second interface, wherein the outer surface of the first hook in the radial direction of the first tube is a first inclined surface, and in the direction from the first interface toward the second interface along the first direction, the first inclined surface extends radially inwardly along the first tube; and / or, the inner surface of the second hook in the radial direction of the second tube is a second inclined surface, and in the direction from the second interface toward the first interface along the first direction, the second inclined surface extends radially outwardly along the second tube.

[0009] In the above technical solution, by setting a first inclined surface and / or a second inclined surface, the first and second inclined surfaces can guide and cooperate during the engagement of the first hook and the second hook, effectively reducing the insertion resistance and achieving smooth and jam-free assembly. At the same time, the first hook and the second hook, which are arranged radially inward and outward, can form an axial limit after being inserted into place, effectively reducing the risk of the first pipe and the second pipe loosening, improving the stability and reliability of the connection between the first holding part and the second holding part, and the structure is simple, easy to form and assemble.

[0010] In some embodiments, the first extension arm extends circumferentially along an arc in the first tube portion, and the side surface of the first extension arm facing the central axis of the first tube portion is flush with the inner wall surface of the first end of the first tube portion; and / or, the second extension arm extends circumferentially along an arc in the second tube portion, and the side surface of the second extension arm facing the central axis of the second tube portion is flush with the inner wall surface of the first end of the second tube portion.

[0011] In the above technical solution, by extending the first extension arm and the second extension arm along an arc and making them flush with the inner wall surfaces of the first pipe section and the second pipe section respectively, the connection reliability between the first extension arm and the first pipe section of the first connecting pipe and the second extension arm and the second pipe section of the second connecting pipe can be improved. It can also reduce the flow resistance of the fluid and improve the flow guiding effect of the first and second connecting pipes on the heat exchange channel.

[0012] In some embodiments, there are multiple first retaining portions, which are arranged at intervals in the circumferential direction at one end of the first tube. There are also multiple second retaining portions, which correspond one-to-one with the multiple first retaining portions.

[0013] In the above technical solution, by setting multiple first and second clamping parts arranged circumferentially, the first and second pipes can be subjected to uniform force in the circumferential direction, effectively reducing local stress concentration, and forming multi-point engagement in the circumferential direction of the first and second pipes, improving the overall strength and stability of the connection. It can also improve the coaxiality of the first and second pipes and reduce the risk of eccentricity, loosening and relative shaking between the first and second pipes.

[0014] In some embodiments, the first connector includes a first limiting platform, which is disposed on the outer peripheral surface of the first pipe portion and extends in an annular shape along the circumference of the first pipe portion. The first limiting platform is located outside the collector and is sealed against the periphery of the first interface by a first sealing member; and / or, the second connector includes a second limiting platform, which is disposed on the outer peripheral surface of the second pipe portion and extends in an annular shape along the circumference of the second pipe portion. The second limiting platform is arranged outside the collector and is sealed against the periphery of the second interface by a second sealing member.

[0015] In the above technical solution, by setting a first limiting platform and a second limiting platform, the first limiting platform and the second limiting platform can respectively realize the installation positioning between the first pipe and the second pipe and the collector, thereby improving assembly efficiency. By sealing the first sealing element against the periphery of the first limiting platform and the first interface, and sealing the second sealing element against the periphery of the second limiting platform and the second interface, the sealing reliability between the first pipe and the second pipe and the collector can be improved.

[0016] In some embodiments, the surface of the first limiting platform that abuts against the current collector is provided with a first groove, the first groove extending in an annular shape along the circumference of the first interface, and the first sealing member is disposed in the first groove; and / or, the surface of the second limiting platform that abuts against the current collector is provided with a second groove, the second groove extending in an annular shape along the circumference of the second interface, and the second sealing member is disposed in the second groove.

[0017] In the above technical solution, by setting the first groove and the second groove, the first groove and the second groove can respectively play a positioning and limiting role for the first seal and the second seal, reducing the probability of the first seal and the second seal shifting, and effectively ensuring that the first seal and the second seal are reliably sealed between the first pipe and the collector and between the second pipe and the receiver.

[0018] In some embodiments, the heat exchange device further includes a connecting pipe, which is a flexible hose, and adjacent first and second connecting pipes of two adjacent heat exchange modules are connected through the connecting pipe.

[0019] In the above technical solution, by setting the connecting pipe as a flexible hose, and connecting the first and second pipes of two adjacent heat exchange modules through the connecting pipe, the flexible material of the connecting pipe can absorb the tolerances during the assembly process, thereby effectively reducing the probability of damage to the connecting pipe and the pressure damage to the collector and heat exchange components, and reducing the risk of leakage in the heat exchange device. In addition, since the connecting pipe does not use a two-color injection molding process, the material cost and processing cost of the connecting pipe can be significantly reduced.

[0020] In some embodiments, the connecting pipe is a corrugated pipe, and / or the connecting pipe is a nylon pipe, a polypropylene pipe, or a polyamide pipe.

[0021] In the above technical solution, by making the connecting pipe a corrugated pipe, the connecting pipe can better absorb the tolerances in the assembly process, reducing the risk of pressure damage to the current collector and heat exchange components. By setting the connecting pipe as a nylon pipe, polypropylene pipe or polyamide pipe, the material cost of the connecting pipe can be reduced while ensuring the flexibility of the connecting pipe.

[0022] In some embodiments, the first connector is an integrally injection-molded part, and / or the second connector is an integrally injection-molded part, and / or the current collector is an aluminum part or an injection-molded part.

[0023] In the above embodiments, by making the first connector an integral injection molded part, the second connector an integral injection molded part, and / or the current collector an aluminum part or injection molded part, the processing and molding of the first connector, the second connector, and the current collector can be facilitated, improving processing efficiency and production efficiency, and reducing production costs.

[0024] Secondly, embodiments of this application provide an energy storage device that includes a battery device according to the first aspect of this application.

[0025] In the above embodiments, by providing the battery device described in the first aspect, the overall performance of the energy storage device is improved.

[0026] Thirdly, embodiments of this application provide an electrical device including a battery according to the first aspect of this application.

[0027] In the above embodiments, by providing the battery device described in the first aspect, the overall performance of the power-consuming device is improved.

[0028] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a vehicle according to an embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the structure of a battery device according to an embodiment of this application;

[0031] Figure 3 This is an exploded view of a battery device according to an embodiment of this application;

[0032] Figure 4 This is an exploded view of the battery device according to an embodiment of this application from another angle;

[0033] Figure 5 This is a partial enlarged view of the heat exchange device of the battery device according to an embodiment of this application;

[0034] Figure 6 yes Figure 5 A schematic diagram of the current collector, the first connector, and the second connector shown;

[0035] Figure 7 yes Figure 6 The cross-sectional view of the current collector, the first connector, and the second connector shown in the figure;

[0036] Figure 8 yes Figure 7 A schematic diagram of the current collector, the first seal, and the second seal shown;

[0037] Figure 9 yes Figure 5 A schematic diagram of the first connector shown;

[0038] Figure 10 yes Figure 9 A schematic diagram of the first connector from another angle;

[0039] Figure 11 yes Figure 5 A schematic diagram of the second pipe shown.

[0040] Figure label:

[0041] 1. Electrical appliances;

[0042] 100. Battery assembly; 200. Controller; 300. Motor;

[0043] 10. Box; 11. First box; 12. Second box;

[0044] 21. Battery cell;

[0045] 30. Heat exchange device; 3a. Heat exchange module;

[0046] 31. Heat exchanger components;

[0047] 32. Current collector; 321. Fluid cavity; 322. First interface; 323. Second interface;

[0048] 33. First connecting pipe; 331. First clamping part; 3311. First extension arm; 3312. First hook part; 3313. First inclined surface;

[0049] 332. First tube section; 333. First limiting platform; 3331. First groove;

[0050] 34. Second connecting pipe; 341. Second clamping part; 3411. Second extension arm; 3412. Second hook part; 3413. Second inclined surface;

[0051] 342. Second tube section; 343. Second limiting platform; 3431. Second groove;

[0052] 35. First seal; 36. Second seal;

[0053] 3b. Connecting pipe;

[0054] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0055] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0057] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0058] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0059] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0060] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two).

[0061] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0062] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0063] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include one or more battery cells; when there are multiple battery cells, they are connected in series, parallel, or mixed connection via a busbar. Mixed connection refers to multiple battery cells being connected in both series and parallel connections.

[0064] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0065] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0066] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0067] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0068] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0069] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0070] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0071] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0072] The battery cells mentioned in the embodiments of this application 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 are not limited to these. Battery cells may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited to these shapes either. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these types either.

[0073] For example, a single battery cell typically includes a housing, a cell assembly, and an electrolyte. The housing is used to house the cell assembly and the electrolyte, and the housing has at least one positive electrode post and at least one negative electrode post. The cell assembly includes one or more electrode assemblies, which are formed by stacking or winding positive electrode sheets, negative electrode sheets, and separators.

[0074] The positive electrode 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 positive current collector without the positive active material layer protrudes from the positive current collector with the positive active material layer. The positive current collector without the positive active material layer serves as a positive electrode tab. Multiple positive electrode tabs are stacked together and form an electrical connection with the positive electrode post. For example, the multiple stacked positive electrode tabs can be directly soldered to the positive electrode post to form an electrical connection; or, the battery cell assembly can also include a positive electrode adapter piece. The multiple stacked positive electrode tabs are soldered to one end of the positive electrode adapter piece, and the other end of the positive electrode adapter piece is soldered to the positive electrode post, so that the positive electrode tabs and the positive electrode post form an electrical connection.

[0075] The negative electrode generally includes a negative current collector and a negative active material layer. The negative active material layer is directly or indirectly coated on the negative current collector. The negative current collector without the negative active material layer protrudes from the negative current collector with the negative active material layer. The negative current collector without the negative active material layer serves as a negative electrode tab. Multiple negative electrode tabs are stacked together and form an electrical connection with the negative electrode post. For example, the stacked negative electrode tabs can be directly welded to the negative electrode post to form an electrical connection; alternatively, the battery cell assembly may also include a negative electrode adapter piece. The stacked negative electrode tabs are welded to one end of the negative electrode adapter piece, and the other end of the negative electrode adapter piece is welded to the negative electrode post, so that the negative electrode tabs and the negative electrode post form an electrical connection. The material of the separator is not limited; for example, it can be polypropylene or polyethylene.

[0076] Meanwhile, individual battery cells primarily function by the movement of metal ions between the positive and negative electrode plates. Taking lithium-ion batteries as an example, the positive electrode current collector can be made of aluminum, and the positive electrode active material layer can be made of lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode current collector can be made of copper, and the negative electrode active material layer can be made of carbon or silicon, etc. During charging and discharging, Li+ ions repeatedly insert and extract between the two electrodes: during charging, Li+ ions extract from the positive electrode, pass through the electrolyte, and insert into the negative electrode, leaving the negative electrode in a lithium-rich state; the reverse occurs during discharging.

[0077] In the thermal management systems of power batteries and energy storage batteries, water-cooled plates are key components for achieving uniform temperature control of individual battery cells and ensuring their charge-discharge performance and cycle life. Currently, harmonica tube water-cooled plates are widely used in the industry as the mainstream heat dissipation structure. Their current collectors are typically integrally machined from aluminum alloy, requiring custom design of the nozzle height, inner diameter, and mounting interface based on the thickness of different battery cells to accommodate assembly requirements of varying cell sizes. These current collectors are welded to the harmonica tube body using a high-frequency welding process to form a single harmonica tube water-cooled plate. Multiple water-cooled plates are then connected in series or parallel via dual-color injection-molded piping to form a complete thermal management cooling circuit. The cooling medium flows in an S-shaped reciprocating pattern within the harmonica tube's internal channels, increasing the heat exchange area and extending the heat exchange time, thereby removing the heat generated by the battery cells during operation and achieving efficient heat dissipation and temperature control of the battery module.

[0078] However, existing one-piece machined harmonica tube current collectors have shortcomings in production and application. Because the current collector is machined as a single piece, the length and structure of the two end nozzles limit the use of large-sized aluminum ingots as raw materials. This results in significant material removal and low utilization during processing, leading to material waste. Furthermore, the nozzle area has a complex structure and requires high forming precision, necessitating multiple machining processes. This not only lengthens the production process and reduces efficiency but also significantly increases manufacturing costs. In addition, new molds and processing procedures must be developed for battery cells of different thicknesses, resulting in poor versatility and hindering product standardization and large-scale production. Consequently, it is difficult to meet the power battery industry's demand for low-cost, high-efficiency, and highly adaptable thermal management solutions.

[0079] Based on the above considerations, in order to reduce raw material waste in the current collector processing, reduce the processing difficulty of the current collector, and improve the production efficiency of the current collector, this application designs a battery device. The battery device includes a heat exchange device, which includes multiple heat exchange modules. Each heat exchange module includes a heat exchange element, a current collector, a first connecting pipe, and a second connecting pipe. The current collector is connected to at least one end of the heat exchange element. One end of the first connecting pipe and one end of the second connecting pipe extend into the fluid cavity of the current collector, and one end of the first connecting pipe and one end of the second connecting pipe are detachably connected within the fluid cavity. This reduces the volume of raw materials required for current collector processing, reduces raw material loss, lowers manufacturing costs, reduces machining steps for the current collector, reduces processing time, and lowers processing costs. At the same time, for current collectors of the same thickness and diameter, the same first connecting pipe and second connecting pipe can be used, thereby reducing development and design costs and further improving production efficiency.

[0080] This application provides an electrical device that uses the battery device disclosed herein as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0081] For ease of explanation, the following embodiments use a vehicle as an example to describe the structure of the electrical device 1 and the battery device 100 of this application in detail.

[0082] Please refer to Figure 1 , Figure 1 The electrical device 1 provided in some embodiments of this application is a schematic diagram of a vehicle structure. The vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle is equipped with a battery device 100, which can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to supply power to the vehicle; for example, the battery device 100 can serve as the vehicle's operating power source. The vehicle may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of starting, navigation, and driving the vehicle. In some embodiments of this application, the battery device 100 can not only serve as the vehicle's operating power source but also as the vehicle's driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle.

[0083] Please refer to Figures 2-4 , Figure 2 This is a schematic diagram of the structure of the battery device 100 provided in some embodiments of this application. Figure 3 and Figure 4 This is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 10 and a plurality of battery cells 21. The housing 10 provides a receiving space for the battery cells 21, which are housed within the housing 10. The housing 10 can have various structures. In some embodiments, the housing 10 may include a first housing 11 and a second housing 12, which overlap each other, together defining a receiving space for accommodating the battery cells 21. The second housing 12 may be a hollow structure with one open end, and the first housing 11 may be a plate-like structure, covering the open side of the second housing 12 so that the first housing 11 and the second housing 12 together define the receiving space; alternatively, the first housing 11 and the second housing 12 may both be hollow structures with one open side, with the open side of the first housing 11 overlapping the open side of the second housing 12. Of course, the box 10 formed by the first box 11 and the second box 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0084] The following is for reference. Figures 3-11 A battery device 100 according to an embodiment of the first aspect of this application is described.

[0085] This application provides a battery device 100, such as... Figures 3-5As shown, the battery device 100 includes: a housing 10, multiple battery packs, and a heat exchange device 30. The multiple battery packs are spaced apart within the housing 10 along a first direction X, and each battery pack includes at least one battery cell 21. The heat exchange device 30 includes multiple heat exchange modules 3a arranged along the first direction X. Each heat exchange module 3a includes: a heat exchange element 31, a current collector 32, a first connecting pipe 33, and a second connecting pipe 34. The heat exchange element 31 has a heat exchange channel and is disposed between two adjacent battery packs and / or on at least one side of the multiple battery packs in the first direction X for heat exchange with the battery packs. The current collector 32 is connected to at least one end of the heat exchanger 31 in the second direction Y. The current collector 32 defines a fluid cavity 321 that communicates with the heat exchange channel. The current collector 32 has a first interface 322 and a second interface 323, which are located on both sides of the current collector 32 in the first direction X. The first direction X intersects with the second direction Y. The first connecting pipe 33 includes a first tube portion 332 and a first retaining portion 331. The first tube portion 332 is a tube extending along the first direction X. One end of the first tube portion 332 passes through the first interface 322 and extends into the fluid cavity 321, communicating with the fluid cavity 321. The first retaining portion... 331 is disposed at one end of the first tube 332. The second tube 34 includes a second tube 342 and a second retaining part 341. The second tube 342 is a tube extending along the first direction X. One end of the second tube 342 passes through the second interface 323 and extends into the fluid cavity 321, communicating with the fluid cavity 321. The second retaining part 341 is disposed at one end of the second tube 342. The first retaining part 331 and the second retaining part 341 are snapped together in the fluid cavity 321. In two adjacent heat exchange modules 3a, the other end of the first tube 33 of one heat exchange module 3a is connected to the other end of the second tube 34 of the other heat exchange module 3a.

[0086] In some examples, the housing 10 is generally rectangular in shape and can be made of metal or composite materials. The outer side of the housing 10 may be formed or equipped with a mounting beam, through which the battery assembly 100 is mounted and fixed to the vehicle. The length of the housing 10 can be along the longitudinal direction of the vehicle (e.g., [missing information]). Figure 2 (as shown in the X direction), the width direction of the housing 10 can be along the left and right directions of the vehicle (e.g., in the X direction). Figure 2 (As shown in the Y direction), the height direction of the housing 10 can be along the vertical direction of the vehicle (e.g., the Y direction). Figure 2 (The Z direction is shown in the diagram).

[0087] In some examples, the housing 10 has two structural beams, and multiple battery packs are arranged sequentially between the two structural beams along a first direction X. The number of battery packs can be two, three, four, five, six, seven, eight, ten, or more. Each battery pack can include one or more battery cells 21. For example, a battery pack can include one, two, three, four, five, six, eight, or more battery cells 21. Multiple battery cells 21 in a battery pack can be arranged in a row along a second direction Y perpendicular to the first direction X. Each battery pack can include one row or multiple rows of battery cells 21 stacked along the first direction X. For example, each battery pack can include one or two rows of battery cells. When the battery cells 21 of multiple battery packs are arranged between the two structural beams, the surface with the largest area on the outer surface of the battery cell 21 is the first surface, which is perpendicular to the first direction X. The surface with the smallest area on the outer surface of the battery cell 21 is the second surface, which is perpendicular to the second direction Y. During the charging and discharging process of the battery device 100, the structural beam can absorb and disperse the expansion force of the battery cells 21 of multiple battery packs in a balanced manner, reduce the deformation risk of the battery cells 21, and improve the stability and reliability of the battery cells 21.

[0088] The heat exchange device 30 may include two, three, four, five, six, seven, eight, nine, ten or more heat exchange modules 3a. In some examples, the heat exchange element 31 of the heat exchange module 3a may be a liquid-cooled water-cooled plate. The heat exchange cold flow channel in the water-cooled plate is used to circulate the heat exchange fluid. The heat exchange fluid is in contact with the first surface of the battery cell 21 through the heat exchange element 31, transferring heat to the battery cell 21. In some examples, a heat exchange element 31 may be provided between each pair of adjacent battery packs, or at least one battery pack may be provided between each pair of adjacent heat exchange elements 31, or a heat exchange element 31 may be provided on at least one side of each battery pack in the first direction X, to ensure the heat exchange efficiency of the heat exchange device 30 for the battery packs.

[0089] In some examples, the heat exchanger 31 extends in a plate shape along the second direction Y, and multiple heat exchange channels are formed within the heat exchanger 31. These multiple heat exchange channels extend along the second direction Y and are spaced apart in the third direction Z. At least one end of the heat exchanger 31 in the first direction X is connected to a collector 32. The fluid cavity 321 of the collector 32 communicates with the multiple heat exchange channels of the heat exchanger 31, enabling the distribution of heat exchange fluid to the multiple heat exchange channels, or the convergence of heat exchange fluid from the multiple heat exchange channels into the fluid cavity 321. For example, the heat exchange fluid can enter the fluid cavity 321 of the collector 32 from the first interface 322, and then a portion of the heat exchange fluid enters the heat exchange channels of the heat exchanger 31, while another portion of the heat exchange fluid enters the collector 32 of the next heat exchange module 3a via the second interface 323.

[0090] In some examples, the first connecting pipe 33 and the collector 32 are separate components that are independently set. The first connecting pipe 33 is a straight pipe with open ends. One end of the first connecting pipe 33 passes through the first interface 322 and extends into the fluid cavity 321. The other end of the first connecting pipe 33 is exposed on the outside of the collector 32 and is used to connect to the adjacent heat exchange module 3a or to connect to the heat exchange pipeline. The first connecting pipe 33 is sealed to the collector 32 at the first interface 322 to ensure the sealing performance between the second connecting pipe 34 and the collector 32 and reduce the risk of heat exchange fluid leakage.

[0091] In some examples, the second connector 34 and the collector 32 are separate components that are independently set. The second connector 34 is a straight pipe with open ends. One end of the second connector 34 passes through the second interface 323 and extends into the fluid cavity 321, while the other end of the second connector 34 is exposed on the outside of the collector 32. It is used to connect to the adjacent heat exchange module 3a or to connect to the heat exchange pipeline. The second connector 34 is sealed to the collector 32 at the second interface 323 to ensure the sealing performance between the second connector 34 and the collector 32 and reduce the risk of heat exchange fluid leakage.

[0092] In some examples, one end of the first connecting pipe 33 extending into the fluid cavity 321 is detachably connected to one end of the second connecting pipe 34 extending into the fluid cavity 321. For example, one end of the first connecting pipe 33 and one end of the second connecting pipe 34 are connected by snap-fit, threaded connection, magnetic connection, or other detachable connection methods within the fluid cavity 321. When the first connecting pipe 33 and the second connecting pipe 34 are connected within the fluid cavity 321, the first connecting pipe 33, the collector 32, and the second connecting pipe 34 are integrated into a single unit. That is, the first connecting pipe 33 and the second connecting pipe 34 can clamp and fix the collector 32 in the middle, achieving assembly and fixation of the three components.

[0093] In some examples, the number of heat exchange modules 3a can be two, three, four, five, six, seven, eight, nine, ten, or more. Multiple heat exchange modules 3a are arranged sequentially along the first direction X and connected sequentially along the first direction X. Specifically, in two adjacent heat exchange modules 3a, the first connecting pipe 33 of one heat exchange module 3a and the second connecting pipe 34 of the other heat exchange module 3a are located between the current collectors 32 of the two heat exchange modules 3a. The first connecting pipe 33 and the second connecting pipe 34 located between the two current collectors 32 can be directly connected or indirectly connected through a connecting pipe 3b, so that the current collectors 32 of the two heat exchange modules 3a are connected. When two heat exchange modules 3a are connected through adjacent first connecting pipes 33 and second connecting pipes 34, the first connecting pipe 33 and the second connecting pipe 34 can be detachably connected, for example, by fasteners, snap-fit, or threaded connections. The first connecting pipe 33 and the second connecting pipe 34 can also be fixedly connected, for example, by direct or indirect welding.

[0094] In this embodiment, since the current collector 32 is an independent component excluding the first connecting pipe 33 and the second connecting pipe 34, when the current collector 32 is integrally machined, there is no need to machine a water outlet on the current collector 32. This allows the current collector 32 to be flattened, reducing the volume of the raw material ingot (such as an aluminum ingot) required for processing, significantly reducing raw material loss and manufacturing costs. Simultaneously, since the current collector 32 itself does not require a water outlet, the machining steps of the current collector 32 can be significantly reduced, lowering processing time and costs, and improving the production efficiency of the current collector 32. Furthermore, since the first connecting pipe 33 and the second connecting pipe 34 are detachably connected directly within the fluid cavity 321, the current collector 32 itself does not require an additional fixing structure for connection to the first connecting pipe 33 and the second connecting pipe 34. This further simplifies the structure of the current collector 32, reduces processing difficulty, and improves the production efficiency of the current collector 32.

[0095] It should be noted that in existing technologies, water nozzles of different heights and inner diameters need to be designed for battery cells of different thicknesses, making it impossible to achieve universality for the current collector 32 and failing to save design time. However, in this embodiment, the current collector 32 is separately configured from the first connecting pipe 33 and the second connecting pipe 34. For current collectors 32 of the same thickness and diameter (sizes of the first interface 322 and the second interface 323), the same first connecting pipe 33 and the same second connecting pipe 34 can be used. This reduces the development and design costs of the heat exchange module 3a and further improves production efficiency. Furthermore, since the first connecting pipe 33 and the second connecting pipe 34 are independent tubular components, they can be formed using injection molding or integral molding methods, thereby reducing the processing steps and manufacturing costs of the first connecting pipe 33 and improving production efficiency.

[0096] In some examples, the first tube portion 332 can be the main structure of the first connecting pipe 33. The first tube portion 332 can be a hollow tubular component extending along the first direction X, with a flow channel for the heat exchange fluid formed inside, mainly used to guide the flow of the heat exchange fluid. It should be noted that the cross-section of the first tube portion 332 can be circular, square, or elliptical, and the cross-section of the first tube portion 332 can also be other irregular shapes.

[0097] In some examples, the second tube portion 342 can be the main structure of the second connecting pipe 34. The second tube portion 342 can be a hollow tubular component extending along the first direction X, with a flow channel for the heat exchange fluid formed inside, mainly used to guide the flow of the heat exchange fluid. It should be noted that the cross-section of the second tube portion 342 can be circular, square, or elliptical, and the cross-section of the second tube portion 342 can also be other irregular shapes.

[0098] In some examples, the first retaining part 331 may be disposed at one end of the first tube portion 332 along the first direction X. For example, if the first direction X is defined as the front-rear direction, the first connecting pipe 33 is arranged on the front side of the collector 32, wherein the first tube portion 332 in the first connecting pipe 33 is disposed on the outer side of the front end of the collector 32 along the first direction X, and the first retaining part 331 is disposed at the rear end of the first tube portion 332 and disposed in the fluid cavity 321 of the collector 32.

[0099] In some examples, the second retaining part 341 may be disposed at one end of the second tube portion 342 along the first direction X. For example, if the first direction X is defined as the front-rear direction, the second connecting pipe 34 is arranged on the rear side of the collector 32, wherein the second tube portion 342 in the second connecting pipe 34 is disposed on the outer side of the rear end of the collector 32 along the first direction X, and the second retaining part 341 is disposed at the rear end of the second tube portion 342 and disposed within the fluid cavity 321 of the collector 32.

[0100] In some examples, the snap-fit ​​connection between the first retaining part 331 and the second retaining part 341 within the fluid cavity 321 can mean that the end of the first retaining part 331 extends into the fluid cavity 321, and the second retaining part 341 also extends into the fluid cavity 321. The first retaining part 331 and the second retaining part 341 are respectively provided with snap-fit ​​structures, and the snap-fit ​​connection between the first connecting pipe 33 and the second connecting pipe 34 is achieved through the snap-fit ​​structures of the two.

[0101] For example, the first holding part 331 can be a hook, a block, a hole, or a slot, and the second holding part 341 can be a hook, a block, a hole, or a slot that is adapted to the first holding part 331.

[0102] In the above technical solution, by detachably connecting one end of the first pipe 33 and one end of the second pipe 34 of the heat exchange module 3a into the fluid cavity 321 of the collector 32, the volume of raw materials required for processing the collector 32 can be reduced, the loss of raw materials can be reduced, the manufacturing cost can be reduced, the machining steps of the collector 32 can be reduced, the processing time can be reduced, and the processing cost can be reduced. At the same time, for collectors 32 of the same thickness and diameter, the same first pipe 33 and second pipe 34 can be used, thereby reducing development and design costs and further improving production efficiency.

[0103] In the above technical solution, the first pipe 33 and the second pipe 34 are connected by a snap-fit ​​connection via a first retaining part 331 and a second retaining part 341. This allows for the detachable connection of the first pipe 33 and the second pipe 34 within the fluid cavity 321 without the need for additional connectors. This enables rapid assembly of the first pipe 33 and the second pipe 34, improves assembly efficiency, and facilitates maintenance and disassembly. Furthermore, the snap-fit ​​connection method has a simple and compact structure, which reduces the space occupied within the fluid cavity 321, reduces the obstruction to the flow of the heat exchange fluid, reduces the pressure loss of the heat exchange fluid, and ensures the heat exchange efficiency of the heat exchange device 30.

[0104] In some embodiments of this application, such as Figure 7 , Figure 9 and Figure 11 As shown, the first holding part 331 includes a first extending arm 3311 and a first hook part 3312. The first extending arm 3311 extends along the first direction X and is connected between one end of the first tube part 332 and the first hook part 3312. The second holding part 341 includes a second extending arm 3411 and a second hook part 3412. The second extending arm 3411 extends along the first direction X and is connected between one end of the second tube part 342 and the second hook part 3412. The first hook part 3312 and the second hook part 3412 are located between the first extending arm 3311 and the second extending arm 3411, and the first hook part 3312 and the second hook part 3412 abut against each other in the first direction X so that the first holding part 331 and the second holding part 341 are engaged. In some examples, the first extension arm 3311 and the second extension arm 3411 are arranged radially inside and outside the first tube portion 332 and the second tube portion 342, with the first hook portion 3312 and the second hook portion 3412 located between the first extension arm 3311 and the second extension arm 3411. In other examples, the first extension arm 3311 and the second extension arm 3411 are arranged circumferentially at intervals in the first tube portion 332 and the second tube portion 342, with the first hook portion 3312 and the second hook portion 3412 located between the first extension arm 3311 and the second extension arm 3411.

[0105] For example, assuming the first direction X is the front-to-back direction, the first connector 33 is arranged on the front side of the collector 32, the second connector 34 is arranged on the rear side of the collector 32, the first retaining part 331 is located at the rear end of the first tube 332, the first extension arm 3311 of the first retaining part 331 is connected to the rear end of the first tube 332 of the first connector 33 and extends rearward, the first hook 3312 is connected to the rear end of the first extension arm 3311 and is located on the radial inner or outer side of the first extension arm 3311 of the first tube 332, and the second retaining part 341 is located in the second tube 34. At the front end of 2, the second extension arm 3411 of the second holding part 341 is connected to the front end of the second tube part 342 of the second connecting pipe 34 and extends forward. The second hook part 3412 is connected to the front end of the second extension arm 3411 and is located on the radial inner or outer side of the second extension arm 3411 in the second tube part 342. In the radial direction of the first connecting pipe 33 and the second connecting pipe 34, the first hook part 3312 and the second hook part 3412 are located between the first extension arm 3311 and the second extension arm 3411, and the first hook part 3312 and the second hook part 3412 are engaged.

[0106] When assembling the first connector 33, the second connector 34, and the collector 32, the first retaining part 331 of the first connector 33 passes through the first interface 322 and extends into the fluid cavity 321 of the collector 32. The second retaining part 341 of the second connector 34 passes through the second interface 323 and extends into the fluid cavity 321, causing the second extension arm 3411 to gradually approach the first extension arm 3311. At this time, the first extension arm 3311 and the second extension arm 3411 located in the fluid cavity 321 are radially offset from each other at the first interface 322. When the hook 3312 contacts the second hook 3412, the first extension arm 3311 and the second extension arm 3411 interact radially and generate elastic deformation, causing the second hook 3412 to gradually pass over the first hook 3312 along the first direction X. When the second connector 34 is inserted into place along the first direction X, the first extension arm 3311 and the second extension arm 3411 return to their original deformation, and the first hook 3312 and the second hook 3412 abut against each other and limit each other in the first direction X, thereby realizing the locking of the first locking part 331 and the second locking part 341.

[0107] In this embodiment, by extending the first extension arm 3311 and the second extension arm 3411 along the first direction X and arranging them radially, the first extension arm 3311 and the second extension arm 3411 can elastically deform during insertion, achieving a press-fit engagement, making assembly simpler and faster, and requiring less operating space during assembly. By having the first hook portion 3312 and the second hook portion 3412 abut against each other in the first direction X, the relative separation of the first connector 33 and the second connector 34 in the first direction X can be effectively limited, improving the strength of the connection structure and effectively reducing the risk of the first connector 33 and the second connector 34 becoming loose. In this embodiment, both the first holding portion 331 and the second holding portion 341 are formed into cantilevered hook shapes, which are simple in structure, easy to form, and can reduce production costs.

[0108] In the above technical solution, by setting the first holding part 331 and the second holding part 341 as a cantilevered hook shape, the structure of the first holding part 331 and the second holding part 341 can be simplified, making it easier for the first connecting pipe 33 and the second connecting pipe 34 to be engaged, making the engagement operation simple and convenient, and also ensuring the connection strength and reliability of the first holding part 331 and the second holding part 341, simplifying the structure and reducing costs.

[0109] In some embodiments of this application, such as Figure 7 and Figure 9 As shown, in the radial direction of the second tube portion 342, the second extension arm 3411 is located between the first extension arm 3311 and the peripheral wall of the second interface 323. The first hook portion 3312 has a first inclined surface 3313 on its outer surface in the radial direction of the first tube portion 332. In the direction from the first interface 322 toward the second interface 323 along the first direction X, the first inclined surface 3313 extends inwardly in the radial direction of the first tube portion 332. And / or, the second hook portion 3412 has a second inclined surface 3413 on its inner surface in the radial direction of the second tube portion 342. In the direction from the second interface 323 toward the first interface 322 along the first direction X, the second inclined surface 3413 extends outwardly in the radial direction of the second tube portion 342.

[0110] It should be noted that either the first tube portion 332 or the second tube portion 342 can be a circular tube or a non-circular tube. When the second tube portion 342 is a non-circular tube, the radial direction of the second tube portion 342 refers to the direction perpendicular to the central axis of the second tube portion 342 and pointing from the central axis of the second tube portion 342 towards the tube wall of the second tube portion 342. Similarly, when the first tube portion 332 is a non-circular tube, the radial direction of the first tube portion 332 refers to the direction perpendicular to the central axis of the first tube portion 332 and pointing from the central axis of the first tube portion 332 towards the tube wall of the first tube portion 332.

[0111] When the first connector 33 and the second connector 34 are connected, the first connector 33 and the second connector 34 are inserted into the fluid cavity 321. The first holding part 331 and the second holding part 341 are inserted and locked together in the first direction X. During this process, the first inclined surface 3313 of the first hook part 3312 and the second inclined surface 3413 of the second hook part 3412 first come into contact with each other and then squeeze. Under the action of the squeezing force, the first extension arm 3311 and the second extension arm 3411 undergo elastic deformation in the radial direction, so that the first hook part 3312 and the second hook part 3412 can avoid each other and slide smoothly. When the first connector 33 and the second connector 34 are inserted in place, the first extension arm 3311 and the second extension arm 3411 elastically reset, and the first hook part 3312 and the second hook part 3412 snap and abut against each other, thereby realizing the stable locking of the first holding part 331 and the second holding part 341.

[0112] In the above technical solution, by setting the first inclined surface 3313 and / or the second inclined surface 3413, the first inclined surface 3313 and the second inclined surface 3413 can guide and cooperate during the engagement of the first hook 3312 and the second hook 3412, effectively reducing the insertion resistance and achieving smooth assembly without jamming. At the same time, the first hook 3312 and the second hook 3412, which are arranged radially inward and outward, can form an axial limit after being inserted into place, effectively reducing the probability of the first pipe 33 and the second pipe 34 being relatively loose, improving the stability and reliability of the connection between the first holding part 331 and the second holding part. Moreover, the structure is simple and easy to form and assemble.

[0113] In some embodiments of this application, such as Figure 9 As shown, the first extension arm 3311 extends circumferentially along an arc in the first tube portion 332, and the surface of the first extension arm 3311 facing the central axis of the first tube portion 332 is flush with the inner wall surface of one end of the first tube portion 332; and / or, as Figure 11 As shown, the second extension arm 3411 extends along an arc in the circumference of the second tube 342, and the side surface of the second extension arm 3411 facing the central axis of the second tube 342 is flush with the inner wall surface of one end of the second tube 342.

[0114] In some examples, the first extension arm 3311 is an arc-shaped plate extending circumferentially along the first tube 332, and the second extension arm 3411 is an arc-shaped plate extending circumferentially along the second tube 342.

[0115] In this embodiment, by extending the first extension arm 3311 along an arc in the circumferential direction of the first connecting pipe 33, the width of the first extension arm 3311 in the circumferential direction of the first connecting pipe 333 can be increased, the connection length between the first extension arm 3311 and the first pipe section 332 can be increased, and the connection strength between the first extension arm 3311 and the first pipe section 332 can be guaranteed. By making the first extension arm 3311 flush with the inner wall surface of the first connecting pipe 33, the first extension arm 3311 can be made not to obstruct the flow of heat exchange fluid. When the heat exchange fluid flows from the first pipe section 332 to the fluid cavity 321 or to the second pipe section 342, the inner wall is continuous, without steps or protrusions, effectively reducing fluid resistance, reducing the probability of eddies, turbulence and impurity retention, and improving the guiding effect on the heat exchange fluid.

[0116] In this embodiment, by extending the second extension arm 3411 along an arc in the circumferential direction of the second connector 34, the circumferential width of the second extension arm 3411 in the second connector 34 can be increased, the connection length between the second extension arm 3411 and the second pipe section 342 can be increased, and the connection strength between the second extension arm 3411 and the second pipe section 342 can be guaranteed. By making the second extension arm 3411 flush with the inner wall surface of the second connector 34, the second extension arm 3411 can be made not to obstruct the flow of heat exchange fluid. When the heat exchange fluid flows from the second extension arm 3411 to the second pipe section 342, the inner wall is continuous, without steps or protrusions, effectively reducing fluid resistance, reducing the probability of eddies, turbulence and impurity retention, and improving the guiding effect on the heat exchange fluid.

[0117] In the above technical solution, by extending the first extension arm 3311 and the second extension arm 3411 along an arc and making them flush with the inner wall surfaces of the first pipe 33 and the second pipe 34 respectively, the connection reliability between the first extension arm 3311 and the first pipe portion 332 of the first pipe 33 and the second extension arm 3411 and the second pipe portion 342 of the second pipe 34 can be improved, the flow resistance to the fluid can be reduced, and the guiding effect of the first pipe 33 and the second pipe 34 on the heat exchange channel can be improved.

[0118] In some embodiments of this application, such as Figure 9 and Figure 11 As shown, there are multiple first holding parts 331, which are arranged at intervals in the circumferential direction at one end of the first tube 332. There are multiple second holding parts 341, which correspond one-to-one with the multiple first holding parts 331.

[0119] For example, the number of first retaining portions 331 can be two, three, four, or more, and the multiple first retaining portions 331 are evenly spaced apart in the circumferential direction of the first tube portion 332. In the circumferential direction of the first tube portion 332, two adjacent first retaining portions 331 cooperate to define a first communication port, and one end of the first tube portion 332 communicates with the fluid cavity 321 of the collector 32 through the first communication port. The number of second retaining portions 341 can be two, three, four, or more, and the multiple second retaining portions 341 are evenly spaced apart in the circumferential direction of the second tube portion 342. In the circumferential direction of the second tube portion 342, two adjacent second retaining portions 341 cooperate to define a second communication port, and one end of the second tube portion 342 communicates with the fluid cavity 321 of the collector 32 through the second communication port.

[0120] In the above technical solution, by setting multiple first retaining parts 331 and second retaining parts 341 arranged circumferentially, the first connector 33 and the second connector 34 can be subjected to uniform force in the circumferential direction, effectively reducing local stress concentration. At the same time, multiple points of engagement can be formed in the circumferential direction of the first connector 33 and the second connector 34, improving the overall strength and stability of the connection. It can also improve the coaxiality of the first connector 33 and the second connector 34, reducing the risk of eccentricity, loosening and relative shaking between the first connector 33 and the second connector 34.

[0121] In some embodiments of this application, such as Figure 7 , Figure 9 and Figure 11 As shown, the first connector 33 includes a first limiting platform 333, which is disposed on the outer peripheral surface of the first pipe section 332 and extends in a ring shape along the circumference of the first pipe section 332. The first limiting platform 333 is located outside the collector 32 and is sealed and abutted against the periphery of the first interface 322 by the first sealing member 35; and / or, the second connector 34 includes a second limiting platform 343, which is disposed on the outer peripheral surface of the second pipe section 342 and extends in a ring shape along the circumference of the second pipe section 342. The second limiting platform 343 is arranged outside the collector 32 and is sealed and abutted against the periphery of the second interface 323 by the second sealing member 36.

[0122] In some examples, the first seal 35 is an O-ring and the second seal 36 is an O-ring.

[0123] In some examples, such as Figure 10As shown, in the radial direction of the first tube portion 332, the distance 'a' between the outer peripheral surface of the first limiting platform 333 and the outer peripheral surface of the first tube portion 332 is greater than or equal to 6 mm. This provides sufficient space to arrange the first sealing element 35, ensuring a sealing effect. In some examples, in the radial direction of the second tube portion 342, the distance between the outer peripheral surface of the second limiting platform 343 and the outer peripheral surface of the second tube portion 342 is greater than or equal to 6 mm. This provides sufficient space to arrange the second sealing element 36, ensuring a sealing effect.

[0124] In some examples, such as Figure 10 As shown, the thickness b of the first limiting platform 333 in the circumferential direction of the first tube portion 332 is greater than or equal to 4 mm to ensure the structural strength of the first limiting platform 333. For example, the thickness of the first limiting platform 333 can be 5 mm, 6 mm, or 7 mm. In some examples, the thickness of the second limiting platform 343 in the circumferential direction of the second tube portion 342 is greater than or equal to 4 mm to ensure the structural strength of the second limiting platform 343. For example, the thickness of the second limiting platform 343 can be 5 mm, 6 mm, or 7 mm.

[0125] In some examples, such as Figure 10 As shown, the distance c between the end edge of the first tube portion 332 away from the second tube portion 342 and the surface of the first limiting platform 333 away from the second tube portion 342 is greater than or equal to 15 mm. That is, the length of the first tube portion 332 extending beyond the first limiting platform 333 away from the second tube portion 342 along the first direction is greater than or equal to 15 mm. This allows the first tube portion 332 to have sufficient length for connecting the second connecting pipe 34 of the adjacent heat exchange module 3a or the connecting pipe 3b described below. For example, the distance c between the end edge of the first tube portion 332 away from the second tube portion 342 and the surface of the first limiting platform 333 away from the second tube portion 342 can be 18 mm, 20 mm, 25 mm, or 30 mm.

[0126] In some examples, the distance between the end edge of the second tube portion 342 away from the first tube portion 332 and the side surface of the second limiting platform 343 away from the first tube portion 332 is greater than or equal to 15 mm. This allows the second tube portion 342 to have sufficient length to connect to the connecting tube 3b described below. For example, the distance between the end edge of the second tube portion 342 away from the first tube portion 332 and the side surface of the second limiting platform 343 away from the first tube portion 332 can be 18 mm, 20 mm, 25 mm, or 30 mm.

[0127] During the assembly of the first connecting pipe 33, the second connecting pipe 34, and the collector 32, one end of the first pipe 332 is inserted into the fluid cavity 321 through the first interface 322. The first limiting platform 333 can cooperate with the periphery of the first interface 322 to limit the depth of the first connecting pipe 33 inserted into the collector 32, thereby achieving effective positioning of the first connecting pipe 33 and the collector 32 in the first direction X, improving assembly efficiency. By setting a first sealing element 35 around the first limiting platform 333 and the first interface 322, the first sealing element 35 can seal the gap between the first limiting platform 333 and the periphery of the first interface 322, effectively reducing the risk of heat exchange fluid leakage from the gap between the first connecting pipe 33 and the collector 32, and improving sealing performance.

[0128] When one end of the second pipe section 342 is inserted into the fluid cavity 321 through the second interface 323, the second limiting platform 343 can cooperate with the periphery of the second interface 323 to limit the depth of the second pipe section 34 inserted into the collector 32, thereby achieving effective positioning of the second pipe section 34 and the collector 32 in the first direction X, improving assembly efficiency. By setting a second sealing element 36 around the periphery of the second limiting platform 343 and the second interface 323, the second sealing element 36 can seal the gap between the second limiting platform 343 and the periphery of the second interface 323, effectively reducing the risk of heat exchange fluid leakage from the gap between the second pipe section 34 and the collector 32, and improving sealing performance.

[0129] In the above technical solution, by setting the first limiting platform 333 and the second limiting platform 343, the first limiting platform 333 and the second limiting platform 343 can respectively realize the installation positioning between the first pipe 33 and the second pipe 34 and the collector 32, thereby improving the assembly efficiency. By sealing the first sealing member 35 against the periphery of the first limiting platform 333 and the first interface 322, and sealing the second sealing member 36 against the periphery of the second limiting platform 343 and the second interface 323, the sealing reliability between the first pipe 33 and the second pipe 34 and the collector 32 can be improved.

[0130] In some embodiments of this application, such as Figure 7 , Figure 9 and Figure 11 As shown, the surface of the first limiting platform 333 that abuts against the current collector 32 is provided with a first groove 3331. The first groove 3331 extends in an annular shape along the circumference of the first interface 322, and the first sealing member 35 is disposed in the first groove 3331. The surface of the second limiting platform 343 that abuts against the current collector 32 is provided with a second groove 3431. The second groove 3431 extends in an annular shape along the circumference of the second interface 323, and the second sealing member 36 is disposed in the second groove 3431.

[0131] In the above technical solution, by setting the first groove 3331 and the second groove 3431, the first groove 3331 and the second groove 3431 can respectively position and limit the first seal 35 and the second seal 36, reduce the probability of the first seal 35 and the second seal 36 shifting, and effectively ensure that the first seal 35 and the second seal 36 are reliably sealed between the first pipe 33 and the collector 32 and between the second pipe 34 and the receiving fluid.

[0132] In some embodiments of this application, such as Figure 5 As shown, the heat exchange device 30 also includes a connecting pipe 3b, which is a flexible hose, and the adjacent first pipe 33 and second pipe 34 of two adjacent heat exchange modules 3a are connected through the connecting pipe 3b.

[0133] It should be noted that in the existing technology, adjacent harmonica tube water-cooling plates are connected by two-color injection-molded tubes. However, the manufacturing process of two-color injection-molded tubes is relatively complex, and the raw materials required are expensive. To achieve the reliability of the thermal management circuit, the walls of the two-color injection-molded tubes are thicker, requiring more raw materials, resulting in higher costs. Furthermore, the outer shell of the two-color injection-molded tubes is relatively rigid and lacks a limiting design, making assembly difficult and unable to effectively absorb tolerances during the assembly process. During the assembly of the battery cells 21 into a group, any tolerances in the battery device 100 may cause damage to the two-color injection-molded tubes, or deformation of the harmonica tube water-cooling plates due to compression, leading to leakage in the thermal management circuit.

[0134] In the above technical solution, by setting the connecting pipe 3b as a flexible hose, and connecting the first pipe 33 and the second pipe 34 of the two adjacent heat exchange modules 3a through the connecting pipe 3b, the soft material of the connecting pipe 3b can absorb the tolerances during the assembly process, thereby effectively reducing the probability of damage to the connecting pipe 3b and the pressure damage to the current collector 32 and the heat exchange component 31, and reducing the risk of leakage of the heat exchange device 30. In addition, since the connecting pipe 3b does not use a two-color injection molding process, the material cost and processing cost of the connecting pipe 3b can be significantly reduced.

[0135] In some embodiments of this application, such as Figure 5 As shown, connecting pipe 3b is a corrugated pipe, and / or, connecting pipe 3b is a nylon pipe, a polypropylene pipe, or a polyamide pipe.

[0136] For example, the connecting pipe 3b can be a nylon corrugated pipe, and the connecting pipe 3b can be welded to the connected first pipe 33 and second pipe 34. For example, the two ends of the connecting pipe 3b can be laser welded to the first pipe 33 and the second pipe 34 respectively.

[0137] In the above technical solution, by making the connecting pipe 3b a corrugated pipe, the connecting pipe 3b can better absorb the tolerances in the assembly process and reduce the risk of pressure damage to the current collector 32 and the heat exchanger 31. By setting the connecting pipe 3b as a nylon pipe, polypropylene pipe or polyamide pipe, the material cost of the connecting pipe 3b can be reduced while ensuring the flexibility of the connecting pipe 3b.

[0138] In some embodiments of this application, such as Figures 6-11 As shown, the first connector 33 is an integral injection molded part, and / or the second connector 34 is an integral injection molded part, and / or the current collector 32 is an aluminum part or an injection molded part.

[0139] For example, the first connector 33 is a plastic part and is integrally formed by injection molding; the second connector 34 is a plastic part and is integrally formed by injection molding; the manifold 32 is an aluminum part and is integrally formed by injection molding or machining; or, the manifold 32 is a plastic part and is integrally formed by injection molding.

[0140] In the above technical solution, by making the first pipe 33 an integral injection molded part, the second pipe 34 an integral injection molded part, and / or the current collector 32 an aluminum part or an injection molded part, the processing and molding of the first pipe 33, the second pipe 34 and the current collector 32 can be facilitated, the processing efficiency and production efficiency can be improved, and the production cost can be reduced.

[0141] In some embodiments of this application, such as Figures 2-3 As shown, the heat exchange device 30 further includes: an inlet pipe, which is arranged at one end of one of the multiple battery cells in the first direction X. Among the multiple heat exchange modules 3a, the two heat exchange modules 3a located at the two ends in the first direction X are respectively formed as a first end module and a second end module. The first connector 33 in the first end module is arranged on the side of the current collector 32 away from the other heat exchange modules 3a and is connected to the inlet pipe. The second connector 34 in the second end module is arranged on the side of the current collector 32 away from the other heat exchange modules 3a, and the end of the second connector 34 away from the first connector 33 is sealed, that is, the second connector 34 in the second end module is formed as a sealing cap for sealing the second interface 323.

[0142] In some embodiments of this application, reference is made to Figure 2 and Figure 3As shown, each heat exchanger 31 has a collector 32 at both ends in the second direction Y. The heat exchange device 30 also includes an outlet pipe, which is arranged at the same end of the multiple battery cells 21 in the first direction X and located on both sides of the multiple battery cells 21 in the second direction Y. The inlet pipe and the outlet pipe are respectively connected to the first pipe 33 of the two collectors 32 connected to the two ends of the first end module. The second pipe 34 connected to the two collectors 32 at the two ends of the second end module are all formed as sealing caps to seal the second interfaces 323 of the two collectors 32 respectively.

[0143] In the above embodiment, the heat exchange elements 31 of the multiple heat exchange modules 3a are connected in parallel between the inlet pipe and the outlet pipe. During the operation of the heat exchange device 30, the heat exchange medium enters the current collector 32 on one side of the multiple heat exchange modules 3a through the inlet pipe. After exchanging heat with the battery cell 21 in the heat exchange elements 31 of the multiple heat exchange modules 3a, it flows from the current collector 32 on the other side of the multiple heat exchange modules 3a to the outlet pipe and finally flows out of the battery device 100, thereby realizing the heat exchange management of the battery device 100.

[0144] Secondly, embodiments of this application also provide an energy storage device, including the battery device 100 of any of the above embodiments.

[0145] In the above technical solution, since the energy storage device is equipped with the battery device 100, and since one end of the first pipe 33 and one end of the second pipe 34 of the heat exchange module 3a of the battery device 100 are detachably connected to the fluid cavity 321 of the current collector 32, the volume of raw materials required for processing the current collector 32 can be reduced, the loss of raw materials can be reduced, the manufacturing cost can be reduced, the machining steps of the current collector 32 can be reduced, the processing time can be reduced, and the processing cost can be reduced. At the same time, for current collectors 32 of the same thickness and diameter, the same first pipe 33 and second pipe 34 can be used, thereby reducing the development and design cost, further improving production efficiency, and improving the overall performance of the energy storage device.

[0146] Thirdly, embodiments of this application also provide an electrical device 1, including the battery device 100 of any of the above embodiments.

[0147] In the above technical solution, since the power device 1 is equipped with the battery device 100, by detachably connecting one end of the first pipe 33 and one end of the second pipe 34 of the heat exchange module 3a into the fluid cavity 321 of the current collector 32, the volume of raw materials required for processing the current collector 32 can be reduced, the loss of raw materials can be reduced, the manufacturing cost can be reduced, the machining steps of the current collector 32 can be reduced, the processing time can be reduced, and the processing cost can be reduced. At the same time, for current collectors 32 of the same thickness and diameter, the same first pipe 33 and second pipe 34 can be used, thereby reducing development and design costs, further improving production efficiency, and thus improving the overall performance of the power device 1.

[0148] The following will refer to Figures 2-11 This application describes a battery device 100 according to a specific embodiment.

[0149] Reference Figures 2-4 The battery device 100 includes a housing 10, structural beams, multiple battery cells 21, and a heat exchange device 30. The housing 10 includes a first housing 11 and a second housing 12, which are mutually fitted together in the third direction Z to define a receiving cavity. There are two structural beams, which extend along the second direction Y and are spaced apart in the first direction X. The multiple battery cells 21 are arranged sequentially between the two structural beams along the first direction X and the second direction Y. The first surface of the multiple battery cells 21 with the largest area is perpendicular to the first direction X, and the second surface with the smallest area is perpendicular to the second direction Y.

[0150] Multiple battery cells 21 constitute multiple battery packs, and the multiple battery packs are arranged at intervals in the first direction X. Each battery pack includes one or two rows of battery cells 21, and each row of battery cells 21 includes multiple battery cells 21 arranged sequentially along the second direction Y.

[0151] The heat exchange device 30 includes multiple heat exchange modules 3a and connecting pipes 3b. The multiple heat exchange modules 3a are disposed between two adjacent battery packs and on both sides of the multiple battery packs in the first direction X. The connecting pipes 3b are connected between two adjacent heat exchange modules 3a.

[0152] The heat exchange module 3a includes a heat exchange element 31, a collector 32, a first connecting pipe 33, a second connecting pipe 34, a first sealing element 35, and a second sealing element 36. The heat exchange element 31 is a water-cooled plate with a heat exchange flow channel. The collector 32 is disposed at at least one end of the heat exchange element 31 in the second direction Y. Each collector 32 has a fluid cavity 321, a first interface 322, and a second interface 323. The fluid cavity 321 is connected to the heat exchange flow channel. The first interface 322 and the second interface 323 are located on both sides of the collector 32 in the thickness direction (first direction X).

[0153] The first connecting pipe 33 includes a first pipe section 332, a first limiting platform 333, and a first holding part 331. The first pipe section 332 extends as a straight pipe along a first direction X. The first limiting platform 333 is disposed on the outer peripheral surface of the first pipe section 332 and extends as a ring along the circumference of the first pipe section 332. The first holding part 331 is connected to one end of the first pipe section 332. There are two first holding parts 331, which are symmetrically arranged in the radial direction of the first pipe section 332. The first holding part 331 includes a first extension arm 3311 and a first hook 3312. The first extension arm 3311 is connected to the first pipe section 332. One end face of the first extension arm 3311 extends away from the first tube 332 along the axis of the first tube 332. The first extension arm 3311 extends in an arc-shaped plate along the circumference of the first tube 332. The first hook 3312 is connected to the free end of the first extension arm 3311 and is located outside the first tube 332 in the radial direction. The end face of the first hook 3312 facing away from the first tube 332 in the first direction X is a first inclined surface 3313. In the direction from the first tube 332 toward the first hook 3312, the first inclined surface 3313 extends inwardly in the radial direction of the first tube 332. The first limiting platform 333 has a first groove 3331 on the side surface facing the first holding part 331. The first groove 3331 extends in an annular shape along the circumference of the first limiting platform 333. The first sealing member 35 is disposed in the first groove 3331.

[0154] The second connector 34 includes a second tube section 342, a second limiting platform 343, and a second holding part 341. The second tube section 342 extends as a straight tube along a first direction X. The second limiting platform 343 is disposed on the outer peripheral surface of the second tube section 342 and extends as a ring along the circumference of the second tube section 342. The second holding part 341 is connected to one end of the second tube section 342. There are two second holding parts 341, which are symmetrically arranged radially in the second tube section 342. The second holding part 341 includes a second extending arm 3411 and a second hook 3412. The second extending arm 3411 is connected to the second tube section 342. The end face of one end of the second tube 342 extends away from the second tube 342 along the axis of the second tube 342. The second extension arm 3411 extends in an arc-shaped plate along the circumference of the second tube 342. The second hook 3412 is connected to the free end of the second extension arm 3411 and is located inside the second extension arm 3411 in the radial direction of the second tube 342. The end face of the second hook 3412 facing away from the second tube 342 in the first direction X is a second inclined surface 3413. In the direction from the second tube 342 toward the second hook 3412, the second inclined surface 3413 extends outwardly in the radial direction of the first tube 332. The second limiting platform 343 has a second groove 3431 on the side surface facing the second holding part 341. The second groove 3431 extends in an annular shape along the circumference of the second limiting platform 343. The second sealing member 36 is disposed in the second groove 3431.

[0155] During assembly, one end of the first connecting pipe 33 with the first retaining part 331 and the other end of the second connecting pipe 34 with the second retaining part 341 extend into the fluid cavity 321 of the collector 32. The first retaining part 331 and the second retaining part 341 engage within the fluid cavity 321. The first sealing member 35 abuts between the first limiting platform 333 and the collector 32, and the second sealing member 36 abuts between the second limiting platform 343 and the collector 32.

[0156] The first pipe 33 and the second pipe 34 located between the two collectors 32 of the two adjacent heat exchange modules 3a are welded together by a connecting pipe 3b, which is a nylon corrugated pipe.

[0157] In the above embodiments, by providing a first retaining part 331 and a second retaining part 341 on the first connecting pipe 33 and the second connecting pipe 34 respectively, the first retaining part 331 and the second retaining part 341 are male and female snap-fits, which interlock within the fluid cavity 321 of the collector 32. Simultaneously, an O-ring seal is used to seal the large surface of the collector 32 with the first connecting pipe 33 and the second connecting pipe 34. This achieves the first connecting pipe 33 and the second connecting pipe 34 being fixed to the collector 32 through interlocking and sealing, replacing the water nozzle on a conventional collector 32. This results in a flattened collector 32, reducing processing costs and minimizing raw material waste during processing. Furthermore, the first connecting pipe 33 and the second connecting pipe 34 are laser-welded to a nylon corrugated pipe, replacing the two-color injection-molded pipe connecting adjacent heat exchange modules 3a. This absorbs tolerances during assembly and simultaneously reduces costs at the component level.

[0158] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Box; Multiple battery packs are spaced apart in the housing along a first direction, and each battery pack includes at least one battery cell. The heat exchange device includes a plurality of heat exchange modules arranged along the first direction, each heat exchange module comprising: A heat exchanger having a heat exchange channel is provided, and the heat exchanger is disposed between two adjacent battery packs and / or on at least one side of the plurality of battery packs in the first direction, for exchanging heat with the battery packs. A current collector is connected to at least one end of the heat exchanger in a second direction. The current collector defines a fluid cavity communicating with the heat exchange channel. The current collector has a first interface and a second interface, which are respectively located on both sides of the current collector in the first direction, and the first direction intersects the second direction. The first connector includes a first tube section and a first retaining portion. The first tube section is tubular, extending along the first direction. One end of the first tube section passes through the first interface and extends into the fluid cavity, communicating with the fluid cavity. The first retaining portion is disposed at the one end of the first tube section. The second connector includes a second tubular section and a second retaining section. The second tubular section is tubular, extending along the first direction. One end of the second tubular section passes through the second interface and extends into the fluid cavity, communicating with the fluid cavity. The second retaining section is disposed at the one end of the second tubular section, and the first retaining section and the second retaining section are engaged and connected within the fluid cavity. In two adjacent heat exchange modules, the other end of the first pipe of one heat exchange module is connected to the other end of the second pipe of the other heat exchange module.

2. The battery device according to claim 1, characterized in that, The first holding portion includes a first extension arm and a first hook portion. The first extension arm extends along the first direction and connects one end of the first tube portion and the first hook portion. The second holding portion includes a second extending arm and a second hook portion. The second extending arm extends along the first direction and connects one end of the second tube portion and the second hook portion. The first hook and the second hook are located between the first extension arm and the second extension arm, and the first hook and the second hook abut against each other in the first direction so that the first holding part and the second holding part engage.

3. The battery device according to claim 2, characterized in that, In the radial direction of the second tube, the second extension arm is located between the first extension arm and the peripheral wall of the second interface, wherein, The outer surface of the first hook portion in the radial direction of the first tube portion is a first inclined surface, which extends radially inward in the direction from the first interface toward the second interface along the first direction; and / or, The inner surface of the second hook in the radial direction of the second tube is a second inclined surface, which extends outward in the radial direction of the second tube in the direction from the second interface toward the first interface along the first direction.

4. The battery device according to claim 2, characterized in that, The first extension arm extends circumferentially along an arc in the first tube portion, and the surface of the first extension arm facing the central axis of the first tube portion is flush with the inner wall surface of one end of the first tube portion; and / or, The second extension arm extends along an arc in the circumference of the second tube, and the surface of the second extension arm facing the central axis of the second tube is flush with the inner wall surface of one end of the second tube.

5. The battery device according to any one of claims 1-4, characterized in that, The number of first retaining parts is multiple, and the multiple first retaining parts are arranged at intervals in the circumferential direction at one end of the first tube. The number of second retaining parts is multiple, and the multiple second retaining parts correspond one-to-one with the multiple first retaining parts.

6. The battery device according to claim 1, characterized in that, The first connector includes a first limiting platform, which is disposed on the outer peripheral surface of the first pipe portion and extends in a ring shape along the circumference of the first pipe portion. The first limiting platform is located outside the collector and is sealed against the periphery of the first interface by a first sealing member; and / or, The second connector includes a second limiting platform, which is disposed on the outer peripheral surface of the second pipe and extends in a ring shape along the circumference of the second pipe. The second limiting platform is arranged outside the collector and is sealed against the periphery of the second interface by a second sealing member.

7. The battery device according to claim 6, characterized in that, The surface of the first limiting platform that abuts against the current collector is provided with a first groove, the first groove extending in a ring shape along the circumference of the first interface, and the first sealing member disposed within the first groove; and / or, The second limiting platform has a second groove on the surface that abuts against the current collector. The second groove extends in a ring shape along the circumference of the second interface, and the second sealing member is disposed in the second groove.

8. The battery device according to claim 1, characterized in that, The heat exchange device further includes a connecting pipe, which is a flexible hose, and adjacent first and second connecting pipes of two adjacent heat exchange modules are connected through the connecting pipe.

9. The battery device according to claim 8, characterized in that, The connecting pipe is a corrugated pipe, and / or the connecting pipe is a nylon pipe, a polypropylene pipe, or a polyamide pipe.

10. The battery device according to claim 1, characterized in that, The first connector is an integral injection molded part, and / or the second connector is an integral injection molded part, and / or the current collector is an aluminum part or an injection molded part.

11. An energy storage device, characterized in that, Includes the battery device according to any one of claims 1-10.

12. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1-10.

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