Heat exchange assembly, battery device, electric equipment and energy storage equipment

Abstract

The embodiment of the utility model provides a heat exchange assembly, a battery device, electric equipment and energy storage equipment. The battery device comprises a box body assembly, a battery monomer assembly and a heat exchange assembly, a containing cavity is formed in the box body assembly. And the battery monomer assembly is arranged in the accommodating cavity. The heat exchange assembly is arranged in the containing cavity. Wherein the heat exchange assembly comprises at least two flexible parts, the at least two flexible parts are stacked, a heat exchange flow channel is formed between the flexible parts, the heat exchange flow channel is used for conducting a heat exchange medium, and the heat exchange medium is used for performing heat exchange with the battery monomer assembly. According to the battery device provided by the embodiment of the invention, the energy density of the battery device is favorably improved, and the fitting degree between the heat exchange assembly and the box body assembly and / or the battery monomer assembly can be improved, so that the effective heat exchange area between the heat exchange assembly and the box body assembly and / or the battery monomer assembly is increased; and the heat exchange efficiency and the heat exchange effect of the heat exchange assembly are improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery devices, and in particular to a heat exchange component, a battery device, an electrical device, and an energy storage device. Background Art

[0002] This section is intended to provide a background or context for the embodiments of the present application. No description herein is admitted to be prior art by virtue of its inclusion in this section.

[0003] In new energy vehicles equipped with batteries, these batteries can provide all or part of the power. During battery use, the cells within the battery generate heat. Excessive heat can negatively impact battery performance and service life. Therefore, effectively dissipating heat from these cells has become an important research topic in this field. Utility Model Content

[0004] In view of this, the embodiments of the present application hope to provide a heat exchange component, a battery device, an electrical device, and an energy storage device to solve the technical problem of how to improve the heat exchange effect.

[0005] To this end, a first aspect of an embodiment of the present application provides a battery device, including:

[0006] A box assembly having an accommodating cavity therein;

[0007] A battery cell assembly is disposed in the accommodating cavity;

[0008] A heat exchange assembly is arranged in the accommodating cavity, wherein the heat exchange assembly includes at least two flexible parts, the at least two flexible parts are stacked, and a heat exchange channel is formed between the flexible parts, the heat exchange channel is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the battery cell assembly.

[0009] The battery device provided in an embodiment of the present application includes a case assembly, a battery cell assembly and a heat exchange assembly. The battery cell assembly is arranged in a receiving cavity of the case assembly. The case assembly protects the battery cell assembly. By also arranging the heat exchange assembly in the receiving cavity, that is, arranging the heat exchange assembly and the battery cell assembly in the same space, it is beneficial to improve the heat exchange efficiency between the heat exchange assembly and the battery cell assembly. In addition, the heat exchange assembly is configured to include a flexible member. The flexible member is relatively light in weight, which is beneficial to reducing the weight of the battery device, reducing the production cost of the heat exchange assembly, and improving the energy density of the battery device. In addition, the flexible member is a flexible structure, which can make the heat exchange assembly better fit with the case assembly and / or the battery cell assembly, thereby absorbing the assembly tolerance of the heat exchange assembly, eliminating the need for filler or thermal conductive material, improving the fit between the heat exchange assembly and the case assembly and / or the battery cell assembly, and increasing the effective heat exchange area between the heat exchange assembly and the case assembly and / or the battery cell assembly, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly.

[0010] In some embodiments, the battery cell assembly includes a plurality of battery cells, and the heat exchange assembly is located between the battery cells.

[0011] This helps to improve the overall rigidity of the battery device, thereby improving the reliability of the battery device. In addition, by arranging the heat exchange component between the battery cells, the contact area between the heat exchange component and the battery cells can be increased, thereby improving the heat exchange efficiency and heat exchange effect.

[0012] In some embodiments, the battery cell assembly includes multiple battery cells, the battery cells include multiple sides, the multiple sides include a first side, and the first side is the side with the smallest area among the multiple sides, wherein the heat exchange assembly is located on one side of the first side of the battery cell.

[0013] In this embodiment, by arranging the heat exchange assembly on one side of the first side of the battery cell, the contact area between the heat exchange assembly and the battery cell can be increased, thereby improving the heat exchange efficiency and heat exchange effect. At the same time, it can also improve the situation in which the battery cell squeezes the heat exchange assembly due to expansion during the use of the battery device, thereby improving the reliability of the heat exchange assembly.

[0014] In some embodiments, the battery cell assembly includes at least one battery pack, the battery pack includes a plurality of battery cells arranged along a first direction, the heat exchange assembly is provided on at least one side of the battery pack along a second direction, and the first direction intersects with the second direction.

[0015] In other words, the heat exchange assembly is not located at the bottom of the battery cell, which helps improve the overall rigidity of the battery assembly, thereby enhancing the reliability of the battery assembly. In addition, by arranging the heat exchange assembly on at least one side of the battery pack along the second direction, the contact area between the heat exchange assembly and the battery cell assembly can be increased, thereby improving heat exchange efficiency and effect.

[0016] In some embodiments, the battery cell assembly includes multiple battery groups, and the multiple battery groups are arranged along the second direction; the battery cell includes multiple side faces, and the multiple side faces include a first side face, which is the side face with the smallest area among the multiple side faces, and the first direction is parallel to the first side face.

[0017] In this embodiment, by arranging the heat exchange assembly on one side of the first side of each battery cell of the battery pack, the contact area between the heat exchange assembly and the battery cell can be increased, thereby improving the heat exchange efficiency and heat exchange effect. At the same time, it can also improve the situation in which the battery cell squeezes the heat exchange assembly due to expansion during the use of the battery device, thereby improving the reliability of the heat exchange assembly.

[0018] In some embodiments, the heat exchange assembly includes at least one heat exchange unit, which includes a first current collector and multiple heat exchange elements arranged along the first direction. The heat exchange elements have the heat exchange flow channel, and the multiple heat exchange elements are all connected to the first current collector.

[0019] In this embodiment, the heat exchange unit is configured to include multiple heat exchange elements arranged along a first direction, so that the arrangement direction of the heat exchange elements in the heat exchange unit is the same as the arrangement direction of the battery cells in the battery pack, which is beneficial to increasing the contact area and thus improving the heat exchange efficiency; at the same time, by connecting multiple heat exchange elements to the first current collector, that is, each heat exchange element collects current through the same first current collector, it is beneficial to simplify the structure of the heat exchange component, reduce costs, and improve the energy density of the battery device.

[0020] In some embodiments, the heat exchange assembly includes a second current collector and a plurality of heat exchange units arranged along a second direction, and the first current collectors of the plurality of heat exchange units are all in communication with the second current collector.

[0021] In this embodiment, by configuring the heat exchange assembly to include multiple heat exchange units arranged along the second direction, so that the arrangement direction of the heat exchange units is the same as the arrangement direction of the battery pack, it is beneficial to increase the contact area between the heat exchange assembly and the battery cell assembly, thereby improving the heat exchange efficiency; at the same time, by connecting the first current collectors of the multiple heat exchange units to the second current collector, that is, each first current collector is collected through the same second current collector, it is beneficial to further simplify the structure of the heat exchange assembly, reduce costs, and improve the energy density of the battery device.

[0022] In some embodiments, the heat exchange element has an inlet and an outlet, and both the inlet and the outlet are connected to the heat exchange channel; the inlet of the same heat exchange unit is located on the same side of the heat exchange unit along the second direction, and the outlet of the same heat exchange unit is located on the same side of the heat exchange unit along the second direction.

[0023] In this embodiment, by locating the inlet of the same heat exchange unit on the same side of the heat exchange unit along the second direction, and locating the outlet of the same heat exchange unit on the same side of the heat exchange unit along the second direction, that is, the inlet and outlet of the same heat exchange unit are arranged on opposite sides of the heat exchange unit along the second direction, it is beneficial to connect multiple heat exchange components with the same first collector, facilitate assembly, and help simplify the structure of the heat exchange assembly.

[0024] In some embodiments, the first current collector includes a first conveying member and a second conveying member, the first conveying member and the second conveying member are arranged on opposite sides of the heat exchange unit along the second direction, the first conveying member is connected to the inlet of the heat exchange unit, and the second conveying member is connected to the outlet of the heat exchange unit.

[0025] In this embodiment, since the inlet and outlet of the same heat exchange unit are arranged on opposite sides of the heat exchange unit along the second direction, by arranging the first conveying member and the second conveying member on opposite sides of the heat exchange unit along the second direction, it is beneficial to connect the first conveying member with the inlet of the heat exchange unit and the second conveying member with the outlet of the heat exchange unit, which is convenient for assembly and helps to simplify the structure of the heat exchange component.

[0026] In some embodiments, the battery cell assembly includes a plurality of battery groups, the plurality of battery groups are arranged along the second direction, and the first current collector is sandwiched between two adjacent battery groups.

[0027] In this embodiment, the first current collector is sandwiched between two adjacent battery groups so that the first current collector is supported between the two adjacent battery groups to form a receiving space, and the heat exchange element is arranged in the receiving space formed between the two adjacent battery groups. In this way, the situation in which the heat exchange flow channel of the heat exchange element is blocked due to the squeezing of the heat exchange element by the two adjacent battery groups can be improved to a certain extent, thereby improving the reliability of the heat exchange component.

[0028] In some embodiments, a dimension of the first current collector in the second direction is greater than or equal to a dimension of the heat exchange element in the second direction.

[0029] In this embodiment, by setting the size of the first current collector in the second direction to be greater than or equal to the size of the heat exchange element in the second direction, a sufficiently large accommodation space can be formed between two adjacent battery packs, which is further beneficial to improving the situation where the heat exchange element is squeezed by two adjacent battery packs, resulting in blockage of the heat exchange flow channel of the heat exchange element, thereby further improving the reliability of the heat exchange component.

[0030] In some embodiments, the hardness of the first current collector is greater than the hardness of the heat exchange element.

[0031] In this embodiment, by setting the hardness of the first current collector to be greater than the hardness of the heat exchange element, the support strength of the first current collector is improved, thereby further improving the reliability of the heat exchange assembly.

[0032] In some embodiments, each of the heat exchange units includes two heat exchange elements, and the inlets and outlets of the two heat exchange elements are arranged at ends of the two heat exchange elements that are close to each other.

[0033] In this embodiment, by arranging the inlets and outlets of the two heat exchangers at the ends close to each other, it is further beneficial to connect multiple heat exchangers to the same first collector, which is convenient for assembly and further helps to simplify the structure of the heat exchange assembly.

[0034] In some embodiments, the heat exchange unit includes a support assembly, and the support assembly is sandwiched between two adjacent battery packs.

[0035] In this embodiment, the support assembly is clamped between two adjacent battery packs so that the support assembly is supported between the two adjacent battery packs to form a accommodating space, and the heat exchange component is arranged in the accommodating space formed between the two adjacent battery packs. In this way, the situation in which the heat exchange flow channel of the heat exchange component is blocked due to the squeezing of the heat exchange component by the two adjacent battery packs can be improved to a certain extent, thereby improving the reliability of the heat exchange component.

[0036] In some embodiments, the support assembly includes a first support member extending along the first direction, and the first support member is disposed at at least one end of the heat exchange member along the height direction.

[0037] In this embodiment, the support assembly includes a first support member extending along a first direction, that is, the first support member has the same extension direction as the heat exchange member and the same arrangement direction as the battery cells in the battery pack. This is beneficial for supporting the length direction of the heat exchange member and limiting the battery cells of the battery pack.

[0038] In some embodiments, the support assembly further includes a second support member extending along a height direction of the battery device, and the second support member is located at one end of the first support member along the first direction.

[0039] In this embodiment, a second support member extending along the height direction of the battery device is provided, and the second support member is located at one end of the first support member along the first direction, which is beneficial for supporting the area where the inlet and outlet parts of the heat exchanger are located, and is also beneficial for limiting the battery cells located in the area where the inlet and outlet parts of the heat exchanger are located.

[0040] In some embodiments, the heat exchange member is provided with an avoidance groove, and at least a portion of the second support member is disposed in the avoidance groove.

[0041] Exemplarily, an avoidance groove is provided between the inlet and the outlet of the heat exchange element, wherein one of the second support members is disposed at the avoidance groove.

[0042] In some embodiments, the support assembly corresponds to the heat exchange element on a one-to-one basis.

[0043] In this embodiment, by setting the support assembly and the heat exchanger in a one-to-one correspondence, it is beneficial to support and protect the heat exchanger in a targeted manner, and the battery cell corresponding to the heat exchanger can be limited in a targeted manner, which can further improve the situation where the heat exchange flow channel of the heat exchanger is blocked due to the squeezing of the heat exchanger by two adjacent battery packs, thereby improving the reliability of the heat exchanger assembly.

[0044] In some embodiments, the dimension of the support assembly in the second direction is greater than or equal to the dimension of the heat exchange element in the second direction.

[0045] In this way, a sufficiently large accommodation space can be formed between two adjacent battery packs, which is further beneficial to improving the situation where the heat exchange component is squeezed by the two adjacent battery packs, resulting in blockage of the heat exchange flow channel of the heat exchange component, thereby further improving the reliability of the heat exchange component.

[0046] In some embodiments, the dimension of the support component in the second direction is greater than 0 and less than or equal to 10 mm.

[0047] It can support the heat exchange component in the length direction, limit the battery cells of the battery pack, and also take into account the energy density of the battery device.

[0048] In some embodiments, the hardness of the support assembly is greater than the hardness of the heat exchange element.

[0049] In this embodiment, by setting the hardness of the support assembly to be greater than the hardness of the heat exchange component, it is helpful to improve the support strength of the support assembly, thereby further improving the reliability of the heat exchange assembly.

[0050] In some embodiments, the support component is an insulating member.

[0051] In this embodiment, by setting the support component as an insulating component, it is beneficial to improve the electrical conductivity between the support component and the blades, heat exchange components, etc., and it is beneficial to improve the corrosion resistance of the support component.

[0052] In some embodiments, the support component is a plastic component.

[0053] In some embodiments, the supporting component is an insulating adhesive layer.

[0054] In this embodiment, by setting the support component as an insulating rubber layer, it is beneficial to improve the conductivity between the support component and the bar, heat exchange component, etc., and to improve the corrosion resistance of the support component. At the same time, the heat exchange component, battery cell and support component can be bonded together, thereby improving the connection stability of the heat exchange component, battery cell and support component, thereby improving the reliability of the battery device.

[0055] In some embodiments, the at least two flexible members are configured as metal plasticized films.

[0056] In this embodiment, the thin and lightweight metal-plasticized films, combined with the flow channel region formed between at least two metal-plasticized films, are unaffected by the extrusion process and eliminate the need for high thickness requirements. This reduces the overall thickness and weight of the heat exchange assembly. Furthermore, the heat exchange assembly does not react with the heat exchange medium flowing within it, eliminating the risk of corrosion or leakage.

[0057] In some embodiments, the at least two flexible members are configured as aluminum-plastic films.

[0058] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0059] In some embodiments, the flexible member is a layered structure, and the flexible member includes a metal layer and a non-metal layer, and the metal layer and the non-metal layer are stacked in sequence.

[0060] In this embodiment, the flexible member, composed of a stack of metal and non-metal layers, is thin and lightweight. Furthermore, by forming a flow channel between at least two flexible members, the flow channel is unaffected by the extrusion process and eliminates the need for strict thickness requirements, thereby reducing the overall thickness and weight of the heat exchange assembly. Furthermore, the heat exchange assembly does not react with the heat exchange medium flowing within, eliminating the risk of corrosion or leakage.

[0061] In some embodiments, the metal layer includes one of aluminum foil, copper foil and steel foil.

[0062] The flexible part can have a certain structural strength and can play an isolation role.

[0063] In some embodiments, the non-metallic layer includes one of polypropylene, polyvinyl chloride, and polyethylene.

[0064] The flexible part can be made waterproof to a certain extent.

[0065] In some embodiments, the non-metallic layer is a hot-melt layer.

[0066] Here, by setting the non-metallic layer as a hot-melt layer, that is, composed of a hot-melt material, it is advantageous to combine the non-metallic layer and the metal layer through hot melting, which makes molding simple and the production efficiency high.

[0067] In some embodiments, the flexible member is a layered structure, and the flexible member includes a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged in sequence, and the waterproof layer is closer to the flow channel area than the corrosion-resistant layer.

[0068] In this embodiment, by configuring the flexible member to include a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged in sequence, the waterproof layer is closer to the flow channel area than the corrosion-resistant layer, which is beneficial to improving the reliability of the heat exchange component.

[0069] In some embodiments, the thickness of the isolation layer is 6.5 μm-100 μm.

[0070] In this embodiment, by setting the thickness of the isolation layer to 6.5 μm-100 μm, the flexible member can have a certain structural strength and flexibility.

[0071] In some embodiments, the thickness of the isolation layer is 6.5 μm-15 μm.

[0072] In this embodiment, by setting the thickness of the isolation layer to 6.5 μm-15 μm, the flexible member can further have a certain structural strength and flexibility.

[0073] In some embodiments, the corrosion-resistant layer has a thickness of 5 μm-20 μm.

[0074] In this embodiment, by setting the thickness of the corrosion-resistant layer to 5 μm-20 μm, the wear resistance and toughness of the flexible component can be improved.

[0075] In some embodiments, the waterproof layer has a thickness of 50 μm-120 μm.

[0076] In this embodiment, by setting the thickness of the waterproof layer to 50 μm-120 μm, the waterproof layer can have a certain structural strength, improve the waterproof performance, and facilitate hot pressing connection of the flexible parts through the waterproof layer.

[0077] In some embodiments, the thickness of the flexible member is 0.05 mm-0.3 mm.

[0078] By setting the thickness of the flexible part to 0.05mm-0.3mm, the heat exchange component made of the flexible part has a certain structural strength while the overall thickness of the heat exchange component is smaller, which is beneficial to reducing the overall volume and weight of the battery to increase the energy density of the battery.

[0079] In some embodiments, the thickness of the flexible member is 0.08 mm-0.2 mm.

[0080] By setting the thickness of the flexible part to 0.08mm-0.2mm, the heat exchange component made of the flexible part has a certain structural strength, while the overall thickness of the heat exchange component is further reduced, which is conducive to further reducing the overall volume and weight of the battery, thereby further increasing the energy density of the battery.

[0081] In some embodiments, the elastic modulus of the flexible member is 0.1 MPa-10000 MPa.

[0082] In this embodiment, by setting the elastic modulus of the flexible part to 0.1MPa-10000MPa, the flexible part can have a certain structural strength, thereby improving the reliability of the heat exchange component, and also have a certain deformation ability, which can improve the fit between the heat exchange component and the box component and / or the battery component battery cell component, thereby increasing the effective heat exchange area between the heat exchange component and the box component and / or the battery component battery cell component, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange component.

[0083] A second aspect of the embodiments of the present disclosure provides a heat exchange assembly, which is the heat exchange assembly of the battery device described above, and is used to exchange heat with the battery cell assembly.

[0084] The heat exchange assembly provided by the embodiment of the present disclosure is conducive to improving the heat exchange efficiency between the heat exchange assembly and the battery cell assembly; in addition, the heat exchange assembly is configured to include a flexible part, and the flexible part is relatively light in weight, which is conducive to reducing the weight of the battery device, reducing the production cost of the heat exchange assembly, and improving the energy density of the battery device; in addition, the flexible part is a flexible structure, which can make the heat exchange assembly fit better with the box assembly and / or the battery cell assembly, thereby facilitating the absorption of the assembly tolerance of the heat exchange assembly, eliminating the need for filler or thermal conductive material, improving the fit between the heat exchange assembly and the box assembly and / or the battery cell assembly, and increasing the effective heat exchange area between the heat exchange assembly and the box assembly and / or the battery cell assembly, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly.

[0085] A third aspect of the embodiments of the present disclosure provides an electrical device, comprising the battery device or the heat exchange assembly described above.

[0086] The battery device of an electrical device provided in an embodiment of the present disclosure includes a case assembly, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is arranged in a receiving cavity of the case assembly. The case assembly protects the battery cell assembly. By also arranging the heat exchange assembly in the receiving cavity, that is, arranging the heat exchange assembly and the battery cell assembly in the same space, it is beneficial to improve the heat exchange efficiency between the heat exchange assembly and the battery cell assembly. In addition, the heat exchange assembly is configured to include a flexible member. The flexible member is relatively light in weight, which is beneficial to reducing the weight of the battery device, reducing the production cost of the heat exchange assembly, and improving the energy density of the battery device. In addition, the flexible member is a flexible structure that can better fit the heat exchange assembly with the case assembly and / or the battery cell assembly, thereby absorbing the assembly tolerance of the heat exchange assembly, eliminating the need for filler or thermal conductive material, improving the fit of the heat exchange assembly with the case assembly and / or the battery cell assembly, and increasing the effective heat exchange area between the heat exchange assembly and the case assembly and / or the battery cell assembly, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly.

[0087] A fourth aspect of the embodiments of the present disclosure provides an energy storage device, comprising the battery device or the heat exchange assembly described above.

[0088] The battery device of the energy storage device provided in the embodiment of the present disclosure includes a case assembly, a battery cell assembly and a heat exchange assembly. The battery cell assembly is arranged in a receiving cavity of the case assembly. The case assembly protects the battery cell assembly. By also arranging the heat exchange assembly in the receiving cavity, that is, arranging the heat exchange assembly and the battery cell assembly in the same space, it is beneficial to improve the heat exchange efficiency between the heat exchange assembly and the battery cell assembly. In addition, the heat exchange assembly is configured to include a flexible member. The flexible member is relatively lightweight, which is beneficial to reducing the weight of the battery device, reducing the production cost of the heat exchange assembly, and improving the energy density of the battery device. In addition, the flexible member is a flexible structure that can better fit the heat exchange assembly with the case assembly and / or the battery cell assembly, thereby absorbing assembly tolerances of the heat exchange assembly, eliminating the need for filler or thermally conductive material, improving the fit of the heat exchange assembly with the case assembly and / or the battery cell assembly, and increasing the effective heat exchange area between the heat exchange assembly and the case assembly and / or the battery cell assembly, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0089] Figure 1 A schematic structural diagram of a vehicle provided in one embodiment of the present application;

[0090] Figure 2 A schematic exploded perspective view of a battery device according to an embodiment of the present application;

[0091] Figure 3 A schematic structural diagram of a second housing portion provided in one embodiment of the present application;

[0092] Figure 4 A schematic structural diagram of a battery pack and a heat exchange unit provided in one embodiment of the present application;

[0093] Figure 5 for Figure 4 Exploded diagram;

[0094] Figure 6 A schematic structural diagram of a heat exchange unit provided in one embodiment of the present application;

[0095] Figure 7 for Figure 6 Enlarged view of point A in the middle;

[0096] Figure 8 for Figure 6 Exploded diagram;

[0097] Figure 9 A schematic structural diagram of a battery cell assembly and a heat exchange assembly provided in one embodiment of the present application;

[0098] Figure 10 for Figure 9 Cross-sectional view in the BB direction

[0099] Figure 11 for Figure 9 Enlarged view of point C in the middle.

[0100] Description of Reference Numerals

[0101] 10. Battery cell assembly; 11. Battery cell; 111. First side; 12. Battery pack; 20. Box assembly; 21. Box body; 211. First box portion; 212. Second box portion; 22. Expansion beam; 23. Accommodation cavity; 30. Heat exchange assembly; 32. Heat exchange unit; 321. First current collector; 322. Heat exchange member; 3221. Heat exchange flow channel; 3222. Inlet; 3223. Outlet; 3224. First conveying member; 3225. Second conveying member; 3226. Avoidance groove; 323. Support assembly; 3231. First support member; 3232. Second support member; 100. Battery device; 200. Controller; 300. Motor; 1000. Vehicle. DETAILED DESCRIPTION

[0102] Unless otherwise specified, all embodiments and optional embodiments of the present disclosure can be combined with each other to form new technical solutions.

[0103] Unless otherwise specified, all technical features and optional technical features disclosed herein can be combined with each other to form a new technical solution.

[0104] With the development of clean energy, more and more devices are using electricity as a driving force. Consequently, power batteries, such as lithium-ion batteries, that can store large amounts of electricity and undergo multiple charge and discharge cycles are rapidly developing. These batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in aerospace and other fields.

[0105] In the embodiment of the present disclosure, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0106] The battery cells may be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present disclosure.

[0107] A battery cell typically includes an electrode assembly. This assembly includes a positive electrode, a negative electrode, and a separator, which is positioned between the positive and negative electrodes. During the charge and discharge process of a battery cell, active ions (such as lithium ions) are intercalated and released between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0108] The electrode assembly may be a wound structure, a laminated structure, or a mixed structure of wound and laminated structures.

[0109] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0110] In some embodiments, the electrode assembly is a laminate structure.

[0111] As an example, multiple positive electrode sheets and multiple negative electrode sheets can be provided respectively, and the multiple positive electrode sheets and the multiple negative electrode sheets can be alternately stacked.

[0112] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.

[0113] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of stacked folded segments.

[0114] As an example, a plurality of separators may be provided, each of which is disposed between any adjacent positive electrode sheets or negative electrode sheets.

[0115] As an example, the separator may be provided continuously, and may be provided between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0116] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0117] In some embodiments, the electrode assembly is provided with tabs that can conduct current from the electrode assembly. The tabs include a positive tab and a negative tab.

[0118] In some embodiments, the battery cell may include an outer shell. The outer shell may be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film. In some embodiments, the outer shell may be a sealed structure or a non-sealed structure. As an example, when the outer shell is a non-sealed structure, the outer shell serves to protect the electrode assembly, and a sealing bag is further included between the outer shell and the electrode assembly, which is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag may be a bag-shaped insulating member or an aluminum-plastic film. When the outer shell is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0119] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in the present disclosure.

[0120] In some embodiments, the housing includes an end cap and a shell, wherein the shell has an opening and the end cap covers the opening. The shell may have one or more openings. One or more end caps may also be provided.

[0121] In some embodiments, the housing is provided with at least one electrode terminal, which is electrically connected to the tab. The electrode terminal may be directly connected to the tab or indirectly connected to the tab via a current collecting member. The electrode terminal may be provided on an end cap or on the housing.

[0122] In some embodiments, the energy storage equipment includes an energy storage container, an energy storage cabinet, etc.

[0123] Power plants are increasingly demanding higher area energy density for energy storage containers. Consequently, to increase the amount of electricity they can hold, the weight of the containers is also increasing. However, containers must be transported from production sites to their intended destinations by land and / or sea, and these transport methods often have weight restrictions. This creates a conflict between the increased energy density and the weight of the energy storage containers.

[0124] During the use of the battery device, the battery cells in the battery device will generate heat. If this heat is too high, it will have an adverse effect on the performance and service life of the battery device. Therefore, how to effectively dissipate heat from the battery cells of the battery device has become an important research direction in this field. In the related art, a cooling system is provided in the battery device box to cool the battery cells in the battery device. The above-mentioned cooling system may include multiple aluminum water-cooling plates laid in the battery device box, and the surfaces of the multiple water-cooling plates are in contact with the surfaces of the battery cells in the battery device. During use, a heat exchange medium such as water flows through the above-mentioned multiple water-cooling plates, thereby removing heat from the battery cells and cooling the battery cells. However, when the aluminum water-cooling plates in the above-mentioned cooling system do not fit well with the surfaces of the battery cells in the battery device, the heat exchange efficiency and heat exchange effect are poor. At the same time, when assembling with the battery cell assembly, assembly tolerance compensation and filling of caulking agent are required, and the production cost is high. In addition, the water-cooling plate and battery device box have high rigidity and require the use of hard structural adhesive, which makes disassembly difficult. If self-adhesive, soft or double-sided adhesive is used, the rigidity of the water-cooling plate and battery device box is relatively good, and when there is a gap and flatness mismatch, there will be problems with debonding.

[0125] In view of this, in order to improve the heat exchange efficiency and heat exchange effect of the heat exchange component, an embodiment of the present application provides a battery device, which includes a box assembly, a battery cell assembly and a heat exchange component. The box assembly has a storage cavity inside. The battery cell assembly is disposed in the storage cavity. The heat exchange component is disposed in the storage cavity. The heat exchange component includes at least two flexible parts, the at least two flexible parts are stacked, and a heat exchange flow channel is formed between the flexible parts. The heat exchange flow channel is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the battery cell assembly.

[0126] The battery device provided in an embodiment of the present application includes a housing assembly, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is arranged in a receiving cavity of the housing assembly. The housing assembly protects the battery cell assembly. By also arranging the heat exchange assembly in the receiving cavity, that is, arranging the heat exchange assembly and the battery cell assembly in the same space, it is beneficial to improve the heat exchange efficiency between the heat exchange assembly and the battery cell assembly. In addition, the heat exchange assembly is configured to include a flexible member. The flexible member is relatively lightweight, which is beneficial to reducing the weight of the battery device, reducing the production cost of the heat exchange assembly, and improving the energy density of the battery device. In addition, the flexible member is a flexible structure with a certain degree of deformation ability, which can enable the heat exchange assembly to better fit and adapt to the housing assembly and / or the battery cell assembly, thereby absorbing the assembly tolerance of the heat exchange assembly, improving the fit of the heat exchange assembly with the housing assembly and / or the battery cell assembly, and increasing the effective heat exchange area between the heat exchange assembly and the housing assembly and / or the battery cell assembly, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly.

[0127] The technical solutions described in the embodiments of this application are applicable to electrical equipment using a battery device. The electrical equipment includes a battery device according to any embodiment of this application, and the battery device is used to provide electrical energy.

[0128] Electrical equipment can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and electric tools, etc. Vehicles can be fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical equipment.

[0129] It should be noted that the technical solutions described in the embodiments of the present application are not limited to the battery devices and electrical equipment described above, but can also be applied to all battery devices including box assemblies and electrical equipment using battery devices. However, for the sake of simplicity, the following embodiments are described using electric vehicles as an example.

[0130] Please refer to Figure 1 , a controller 200, a motor 300 and a battery device 100 may be provided inside the vehicle 1000, and the controller 200 is used to control the battery device 100 to power the motor 300. For example, the battery device 100 may be provided at the bottom, front or rear of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000. For example, the battery device 100 may be used as an operating power source for the vehicle 1000, for the circuit system of the vehicle 1000, for example, for the working power requirements during the start-up, navigation and operation of the vehicle 1000. In another embodiment of the present application, the battery device 100 may not only be used as an operating power source for the vehicle 1000, but may also be used as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0131] See also Figure 2In order to meet different power requirements, the battery device 100 includes a battery cell assembly 10, which may include multiple battery cells 11. The battery cell 11 refers to the smallest unit that constitutes the battery device 100 module or battery device 100 pack. The multiple battery cells 11 can be connected in series, in parallel, or in a mixed connection. Mixed connection means that the multiple battery cells 11 are connected in both series and parallel. The multiple battery cells 11 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 11 is accommodated in the box assembly 20. Of course, the battery device 100 can also be a battery device 100 module in the form of multiple battery cells 11 first connected in series, in parallel, or in a mixed connection, and the multiple battery device 100 modules are then connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box assembly 20. The battery device 100 may also include other structures. For example, the battery device 100 may also include a busbar component for achieving electrical connection between the multiple battery cells 11. Each battery cell 11 may be a secondary battery device 100 or a primary battery device 100; it may also be a lithium-sulfur battery device 100, a sodium-ion battery device 100, or a magnesium-ion battery device 100, but is not limited thereto. The battery cell 11 may be cylindrical, flat, rectangular, or in other shapes.

[0132] See also Figures 2 to 4 The embodiment of the present application provides a battery device, which includes a box assembly 20, a battery cell assembly 10, and a heat exchange assembly 30. The box assembly 20 has a receiving cavity 23. The battery cell assembly 10 is disposed in the receiving cavity 23. The heat exchange assembly 30 is disposed in the receiving cavity 23. The heat exchange assembly 30 includes at least two flexible parts, see Figure 11 At least two flexible parts are stacked, and a heat exchange channel 3221 is formed between the flexible parts. The heat exchange channel 3221 is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the battery cell assembly 10.

[0133] Please refer to Figure 2 The battery device 100 includes a box assembly 20 and a battery cell assembly 10 . The battery cell assembly 10 includes at least one battery cell 11 . The battery cell 11 is disposed in a receiving cavity 23 of the box assembly 20 .

[0134] The housing assembly 20 can be a simple three-dimensional structure such as a single rectangular parallelepiped, cylinder, or sphere, or a complex three-dimensional structure composed of a combination of simple three-dimensional structures such as rectangular parallelepiped, cylinder, or sphere. The housing assembly 20 can be made of an alloy material such as aluminum alloy or iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

[0135] The box assembly 20 is used to encapsulate the battery cell assembly 10 . The box assembly 20 can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cell assembly 10 .

[0136] For example, the box assembly 20 is generally a rectangular parallelepiped structure, the length and width directions of the box assembly 20 are parallel to the horizontal plane, and the length direction of the box assembly 20 is parallel to the longest side of the rectangular parallelepiped structure of the box assembly 20. The height direction of the box assembly 20 is perpendicular to the ground. For example, Figure 2 and Figure 3 As shown, the length direction of the box assembly 20 is represented by X, the width direction of the box assembly 20 is represented by Y, and the height direction of the box assembly 20 is represented by Z.

[0137] For example, the first direction may be the length direction of the box assembly 20 , and the second direction may be the width direction of the box assembly 20 .

[0138] Please refer to Figures 2 to 11 The embodiment of the present application provides a heat exchange component 30 , which is the heat exchange component 30 of the battery device 100 provided in the embodiment of the present application. The heat exchange component 30 is used to exchange heat with the battery cell component 10 .

[0139] Here, the heat exchange assembly 30 is disposed in the accommodating cavity 23 of the box assembly 20 , that is, it can be in direct contact with the battery cell assembly 10 , which is beneficial to improving the heat exchange efficiency and heat exchange effect.

[0140] That the heat exchange assembly 30 includes at least two flexible parts means that the number of flexible parts included in the heat exchange assembly 30 can be two or more than two.

[0141] Here, the flexibility of the flexible member 31 refers to the material properties of the structure. This type of property can be a property imparted to the material due to its light weight, or a property imparted to the material due to at least one of its properties, such as thickness, stiffness, strength, and elastic modulus. As an example, the material of the flexible member 31 can be selected to be a material that is lighter than conventional structures such as aluminum plates or steel plates, and its flexibility can be controlled by the thickness, width, length, and material type of the flexible member 31. By configuring the heat exchange assembly 30 as the flexible member 31 in the embodiment of the present disclosure, the weight of the heat exchange assembly 30 can be reduced.

[0142] At least two flexible parts include a heat-sealing area, and the heat-sealing area is constructed by hot pressing of at least two flexible parts. The heat-sealing area separates the heat exchange component 30 to form a heat exchange channel 3221 and a non-heat-sealing area, which means that the flexible parts are hot pressed to form the heat exchange channel 3221 and the non-heat-sealing area, that is, the heat-sealing area separates the heat exchange channel 3221 and the non-heat-sealing area.

[0143] The heat exchange medium circulates in the heat exchange channel 3221 to achieve heat exchange with the battery cell assembly 10 .

[0144] It should be noted that the specific type of heat exchange medium is not limited here, as long as it can cool the battery cells 11. For example, it can be gaseous or liquid. In the embodiment of the present application, the heat exchange medium is described as a cooling liquid.

[0145] Exemplarily, the heat exchange component 30 further includes a liquid inlet and a liquid outlet, which are used to connect to pipelines of liquid storage devices such as an air conditioning system or a water tank of a vehicle or electrical equipment.

[0146] It should be noted that the specific number of heat exchange channels 3221 is not limited here and can be one or more.

[0147] The multiple mentioned in the embodiments of the present application refers to a number of two or more.

[0148] The principle of heat exchange of the heat exchange component 30 for the battery cell assembly 10 is as follows: the heat exchange medium output by the heat exchange medium source (not shown) enters the medium circulation through the inlet 3222 of the heat exchange component 30, and after the heat exchange medium exchanges heat with the battery cell assembly 10, the heat exchange medium flows out through the outlet 3223 of the heat exchange component 30, completing the heat exchange of the battery cell assembly 10.

[0149] Here, the heat exchange assembly 30 exchanging heat with the battery cell assembly 10 may be to dissipate heat from the battery cell assembly 10 or to heat the battery cell assembly 10 .

[0150] The principle of heat dissipation of the battery cell assembly 10 by the heat exchange component 30 is as follows: the heat exchange medium output by the heat exchange medium source enters the medium flow channel through the inlet 3222 of the heat exchange component 30. After the heat exchange medium absorbs the heat generated during the operation of the battery cell assembly 10, the heat exchange medium flows out through the outlet 3223 of the heat exchange component 30, releasing heat, thereby completing the cooling and heat dissipation of the battery cell assembly 10.

[0151] The principle of the heat exchange component 30 heating the battery cell assembly 10 is as follows: the heat exchange medium output by the heat exchange medium source enters the medium flow channel through the inlet 3222 of the heat exchange component 30, and the heat exchange medium transfers heat to the battery cell assembly 10. After heating the battery cell assembly 10, the heat exchange medium flows out through the outlet 3223 of the heat exchange component 30, completing the heating of the battery cell assembly 10.

[0152] The flexible part is set as a flexible structure, and the flexible part has certain expandable or contractible characteristics. It can also be understood that the flexible part can be an elastically deformable structure. The flexible part has the ability to deform and restore deformation, so that the heat exchange component 30 can be formed into a contoured structure. The heat exchange component 30 can better adapt to the external contour shape of the battery cell or other components to improve the fit between the heat exchange component 30 and the box component 20 and / or the battery cell component 10, thereby increasing the effective heat exchange area between the heat exchange component 30 and the box component 20 and / or the battery cell component 10, thereby improving the heat exchange efficiency.

[0153] It should be noted that the flexible part can have conductive properties, which is conducive to maintaining an equipotential setting with the box assembly 20; the flexible part can also have electrical insulation properties, without the need for insulation treatment, which is conducive to reducing the leakage risk and production cost of the battery device 100, thereby improving the reliability of the battery device 100.

[0154] The battery device provided in the embodiment of the present application includes a box assembly 20, a battery cell assembly 10 and a heat exchange assembly 30. The battery cell assembly 10 is arranged in the accommodating cavity 23 of the box assembly 20. The box assembly 20 protects the battery cell assembly 10. By also arranging the heat exchange assembly 30 in the accommodating cavity 23, that is, arranging the heat exchange assembly 30 and the battery cell assembly 10 in the same space, it is beneficial to improve the heat exchange efficiency between the heat exchange assembly 30 and the battery cell assembly 10; in addition, the heat exchange assembly 30 is configured to include a flexible part. The weight of the flexible part is relatively light, which is beneficial to reducing the weight of the battery device 100 and reducing The production cost of the heat exchange component 30 is low, and it is beneficial to improve the energy density of the battery device 100; in addition, the flexible part is a flexible structure with a certain deformation ability, which can make the heat exchange component 30 better fit and adapt to the box component 20 and / or the battery cell component 10, thereby absorbing the assembly tolerance of the heat exchange component 30, improving the fit between the heat exchange component 30 and the box component 20 and / or the battery cell component 10, and increasing the effective heat exchange area between the heat exchange component 30 and the box component 20 and / or the battery cell component 10, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange component 30.

[0155] The box assembly 20 is used to accommodate the battery cell assembly 10. The box assembly 20 can be of various structures. In some embodiments, please refer to Figure 2The housing assembly 20 includes a housing body 21, which may include a first housing portion 211 and a second housing portion 212. The first housing portion 211 and the second housing portion 212 cover each other, and the first housing portion 211 and the second housing portion 212 jointly define a housing cavity 23 for accommodating the battery cell assembly 10 and the heat exchange assembly 30. The second housing portion 212 may be a hollow structure with one end open. The first housing portion 211 is a plate-like structure, and the first housing portion 211 covers the open side of the second housing portion 212 to form the housing body 21 with the housing cavity 23. The first housing portion 211 and the second housing portion 212 may also each be a hollow structure with one end open, and the open side of the first housing portion 211 covers the open side of the second housing portion 212 to form the housing body 21 with the housing cavity 23. Of course, the first housing portion 211 and the second housing portion 212 may have various shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0156] In order to improve the sealing performance after the first box body 211 and the second box body 212 are connected, a sealing member, such as a sealant, a sealing ring, etc., may also be provided between the first box body 211 and the second box body 212 .

[0157] Assuming that the first box portion 211 covers the top of the second box portion 212 , the first box portion 211 can also be referred to as an upper box cover, and the second box portion 212 can also be referred to as a lower box cover.

[0158] Exemplarily, the box assembly 20 includes a bottom guard plate, which may be provided at the bottom of the box body 21. By providing the bottom guard plate, the box assembly 20 and the battery cell 11 can be protected.

[0159] In some embodiments, see Figure 2 The battery cell assembly 10 includes a plurality of battery cells 11 , and the heat exchange assembly 30 is located between the battery cells 11 .

[0160] Here, the heat exchange assembly 30 includes a flexible part, and the structural strength of the flexible part is relatively weak. Therefore, if the heat exchange assembly 30 is arranged at the bottom of the battery cell assembly 10, the heat exchange assembly 30 cannot provide sufficient structural strength, that is, it cannot provide good support for the battery cell 11. In other words, the bottom of the battery cell 11 is in a suspended state, resulting in a low overall rigidity of the battery device 100.

[0161] In the embodiment of the present application, the heat exchange assembly 30 is disposed between the battery cells 11. That is, the heat exchange assembly 30 is not disposed at the bottom of the battery cells 11. This helps to improve the overall rigidity of the battery device 100, thereby improving the reliability of the battery device 100. In addition, by disposing the heat exchange assembly 30 between the battery cells 11, the contact area between the heat exchange assembly 30 and the battery cells 11 can be increased, thereby improving the heat exchange efficiency and heat exchange effect.

[0162] In some embodiments, see Figure 2 and Figure 5 The battery cell assembly 10 includes a plurality of battery cells 11. The battery cell 11 includes a plurality of side surfaces, including a first side surface 111. The first side surface 111 is the side surface with the smallest area among the plurality of side surfaces. The heat exchange assembly 30 is located on one side of the first side surface 111 of the battery cell 11.

[0163] It should be noted that the first side surface 111 described in the embodiment of the present application is the small side surface of the battery cell 11 , which is the side surface with the smallest area among the multiple side surfaces of the battery cell 11 .

[0164] Taking the square battery cell 11 as an example, in the vertical state, the side surface of the battery cell 11 is the surface formed by the length direction and height direction of the battery cell 11 and the surface formed by the width direction and height direction of the battery cell 11. The surface formed by the length direction and height direction of the battery cell 11 is the large surface of the battery cell 11, and the surface formed by the width direction and height direction of the battery cell 11 is the small surface of the battery cell 11.

[0165] Here, the heat exchange assembly 30 is located on one side of the first side 111 of the battery cell 11. The heat exchange assembly 30 can be provided on one side of the first side 111 of the battery cell 11, or on one side of both first side 111 of the battery cell 11.

[0166] Here, during the charge and discharge cycle, the battery cell 11 is prone to swelling on the large surface, while the small surface of the battery cell 11 does not experience significant swelling.

[0167] In this embodiment, by arranging the heat exchange assembly 30 on one side of the first side surface 111 of the battery cell 11, the contact area between the heat exchange assembly 30 and the battery cell 11 can be increased, thereby improving the heat exchange efficiency and heat exchange effect. At the same time, it can also improve the situation in which the battery cell 11 squeezes the heat exchange assembly 30 due to expansion during the use of the battery device 100, thereby improving the reliability of the heat exchange assembly 30.

[0168] In some embodiments, see Figures 2 to 5 The battery cell assembly 10 includes at least one battery group 12, the battery group 12 includes a plurality of battery cells 11 arranged along a first direction, and a heat exchange assembly 30 is provided on at least one side of the battery group 12 along a second direction, and the first direction intersects the second direction.

[0169] The intersection of the first direction and the second direction means that the first direction and the second direction are not parallel. Exemplarily, the first direction and the second direction are perpendicular to each other.

[0170] The battery cell assembly 10 may include one battery group 12 or may include multiple battery groups 12. In the embodiment where the battery cell assembly 10 includes multiple battery groups 12, the battery groups 12 are arranged along the second direction.

[0171] The heat exchange assembly 30 may be provided on one side of the battery pack 12 along the second direction, or may be provided on both sides of the battery pack 12 along the second direction.

[0172] In the embodiment of the present application, by disposing the heat exchange assembly 30 on at least one side of the battery pack 12 along the second direction, that is, the heat exchange assembly 30 is not disposed on the bottom of the battery cell 11, which helps to improve the overall rigidity of the battery device 100, thereby improving the reliability of the battery device 100. In addition, by disposing the heat exchange assembly 30 on at least one side of the battery pack 12 along the second direction, the contact area between the heat exchange assembly 30 and the battery cell assembly 10 can be increased, thereby improving the heat exchange efficiency and effect.

[0173] In some embodiments, see Figures 2 to 5 ,as well as Figures 9 to 11 The battery cell assembly 10 includes a plurality of battery packs 12 arranged along a second direction. The battery cell 11 includes a plurality of side surfaces, including a first side surface 111 having the smallest area among the plurality of side surfaces. The first direction is parallel to the first side surface 111.

[0174] The battery pack 12 includes a plurality of battery cells 11 arranged along a first direction parallel to the first side surface 111. In other words, the large surfaces of the battery cells 11 of the battery pack 12 are aligned relative to each other. In other words, the heat exchange assembly 30 is disposed on one side of the small surface of each battery cell 11 of the battery pack 12.

[0175] Here, the heat exchange assembly 30 may be disposed between adjacent battery packs 12 .

[0176] In this embodiment, by arranging the heat exchange assembly 30 on one side of the first side surface 111 of each battery cell 11 of the battery pack 12, the contact area between the heat exchange assembly 30 and the battery cell 11 can be increased, thereby improving the heat exchange efficiency and heat exchange effect. At the same time, it can also improve the situation in which the battery cell 11 squeezes the heat exchange assembly 30 due to expansion during the use of the battery device 100, thereby improving the reliability of the heat exchange assembly 30.

[0177] In some embodiments, see Figures 2 to 11 The heat exchange assembly 30 includes at least one heat exchange unit 32, which includes a first current collector 321 and a plurality of heat exchange elements 322 arranged along a first direction. The heat exchange elements 322 have heat exchange channels 3221. The plurality of heat exchange elements 322 are all in communication with the first current collector 321.

[0178] Here, the heat exchange assembly 30 including at least one heat exchange unit 32 means that the heat exchange assembly 30 may include one heat exchange unit 32 or multiple heat exchange units 32 , which may be determined according to different requirements of the battery device 100 .

[0179] The heat exchange unit 32 includes multiple heat exchange elements 322 arranged along a first direction. That is, the arrangement direction of the heat exchange elements 322 in the heat exchange unit 32 and the arrangement direction of the battery cells 11 in the battery pack 12 are both in the first direction, that is, the arrangement direction of the heat exchange elements 322 in the heat exchange unit 32 is the same as the arrangement direction of the battery cells 11 in the battery pack 12, which is beneficial to increase the contact area.

[0180] In addition, since the heat exchange element 322 includes a flexible element, the heat exchange unit 32 is configured to reduce the size of the heat exchange element 322 in the first direction by setting a plurality of heat exchange elements 322 arranged along the first direction, thereby reducing the manufacturing difficulty of the heat exchange element 322 and improving the rigidity of a single heat exchange element 322 in the first direction.

[0181] The plurality of heat exchange elements 322 are all in communication with the first fluid collector 321 , that is, the heat exchange elements 322 are collected through the same first fluid collector 321 , which is beneficial for simplifying the structure of the heat exchange assembly 30 .

[0182] It should be noted that the box assembly 20 is further provided with an expansion beam 22, which extends along the second direction and is used to support the battery pack 12. Therefore, the heat exchange unit 32 is provided with multiple heat exchange elements 322 arranged along the first direction, which is also conducive to avoiding the expansion beam 22.

[0183] In this embodiment, the heat exchange unit 32 is configured to include multiple heat exchange elements 322 arranged along a first direction, so that the arrangement direction of the heat exchange elements 322 in the heat exchange unit 32 is the same as the arrangement direction of the battery cells 11 in the battery pack 12, which is beneficial to increasing the contact area and thus improving the heat exchange efficiency; at the same time, by connecting the multiple heat exchange elements 322 to the first current collector 321, that is, the various heat exchange elements 322 are collected through the same first current collector 321, which is beneficial to simplifying the structure of the heat exchange assembly 30, reducing costs, and improving the energy density of the battery device 100.

[0184] In some embodiments, see Figures 2 to 11 The heat exchange assembly 30 includes a second fluid collector and a plurality of heat exchange units 32 arranged along the second direction, and the first fluid collectors 321 of the plurality of heat exchange units 32 are all connected to the second fluid collector.

[0185] Exemplarily, the second current collector is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet of the second current collector are used to be connected to pipelines of the entire vehicle.

[0186] The heat exchange assembly 30 is configured to include multiple heat exchange units 32 arranged along the second direction, that is, the arrangement direction of the heat exchange unit 32 and the arrangement direction of the battery pack 12 are both the second direction, that is, the arrangement direction of the heat exchange unit 32 is the same as the arrangement direction of the battery pack 12, which is conducive to increasing the contact area.

[0187] By configuring the heat exchange assembly 30 to include a plurality of heat exchange units 32 arranged along the second direction, the arrangement direction of the heat exchange units 32 is the same as the arrangement direction of the battery pack 12.

[0188] In this embodiment, the heat exchange assembly 30 is configured to include multiple heat exchange units 32 arranged along the second direction, so that the arrangement direction of the heat exchange units 32 is the same as the arrangement direction of the battery pack 12, which is beneficial to increasing the contact area between the heat exchange assembly 30 and the battery cell assembly 10, thereby improving the heat exchange efficiency; at the same time, by connecting the first collectors 321 of the multiple heat exchange units 32 to the second collector, that is, each first collector 321 is collected through the same second collector, which is beneficial to further simplifying the structure of the heat exchange assembly 30, reducing costs, and improving the energy density of the battery device 100.

[0189] In some embodiments, see Figures 6 to 11 The heat exchange element 322 has an inlet 3222 and an outlet 3223, both of which are in communication with the heat exchange channel 3221. The inlet 3222 of the same heat exchange unit 32 is located on the same side of the heat exchange unit 32 along the second direction, and the outlet 3223 of the same heat exchange unit 32 is located on the same side of the heat exchange unit 32 along the second direction.

[0190] The heat exchange element 322 has an inlet 3222 and an outlet 3223 . The heat exchange element 322 is in communication with the first current collector 321 through the inlet 3222 and the outlet 3223 .

[0191] The inlet 3222 of the same heat exchange unit 32 is located on the same side of the heat exchange unit 32 along the second direction, that is, the inlet 3222 of the heat exchange element 322 of the same heat exchange unit 32 is located on the same side of the heat exchange unit 32 along the second direction, or in other words, the inlet 3222 of the heat exchange element 322 of the same heat exchange unit 32 is arranged toward the same side of the heat exchange unit 32 along the second direction.

[0192] The outlet 3223 of the same heat exchange unit 32 is located on the same side of the heat exchange unit 32 along the second direction, that is, the outlet 3223 of the heat exchange element 322 of the same heat exchange unit 32 is located on the same side of the heat exchange unit 32 along the second direction, or in other words, the outlet 3223 of the heat exchange element 322 of the same heat exchange unit 32 is arranged toward the same side of the heat exchange unit 32 along the second direction.

[0193] In this embodiment, by locating the inlet 3222 of the same heat exchange unit 32 on the same side of the heat exchange unit 32 along the second direction, and locating the outlet 3223 of the same heat exchange unit 32 on the same side of the heat exchange unit 32 along the second direction, that is, the inlet 3222 and outlet 3223 of the same heat exchange unit 32 are arranged on opposite sides of the heat exchange unit 32 along the second direction, it is beneficial to connect multiple heat exchange components 322 with the same first fluid collector 321, facilitate assembly, and help simplify the structure of the heat exchange assembly 30.

[0194] In some embodiments, see Figures 8 to 11 The first current collector 321 includes a first conveying member 3224 and a second conveying member 3225. The first conveying member 3224 and the second conveying member 3225 are disposed on opposite sides of the heat exchange unit 32 along the second direction. The first conveying member 3224 is in communication with the inlet 3222 of the heat exchange unit 32, and the second conveying member 3225 is in communication with the outlet 3223 of the heat exchange unit 32.

[0195] Here, the first conveying member 3224 and the second conveying member 3225 both extend along the first direction, that is, along the arrangement direction of the heat exchange members 322 in the heat exchange unit 32 .

[0196] The first conveying member 3224 is, for example, a pipe, and a conveying channel is formed inside the pipe.

[0197] The second conveying member 3225 is, for example, a pipe, and a conveying channel is formed inside the pipe.

[0198] Here, the first conveying member 3224 and the second conveying member 3225 may be an integrated structure. The integrated first conveying member 3224 and the second conveying member 3225 can reduce the number of parts, shorten assembly time, and improve assembly efficiency.

[0199] Of course, the first conveying member 3224 and the second conveying member 3225 may also be a split structure. The split first conveying member 3224 and the second conveying member 3225 are conducive to forming the required structure.

[0200] In this embodiment, since the inlet 3222 and outlet 3223 of the same heat exchange unit 32 are arranged on opposite sides of the heat exchange unit 32 along the second direction, by arranging the first conveying member 3224 and the second conveying member 3225 on opposite sides of the heat exchange unit 32 along the second direction, it is beneficial to connect the first conveying member 3224 with the inlet 3222 of the heat exchange unit 32, and the second conveying member 3225 with the outlet 3223 of the heat exchange unit 32, which is convenient for assembly and helps to simplify the structure of the heat exchange component 30.

[0201] In some embodiments, the battery cell assembly 10 includes a plurality of battery groups 12 . The plurality of battery groups 12 are arranged along the second direction, and the first current collector 321 is sandwiched between two adjacent battery groups 12 .

[0202] Illustratively, the inlet 3222 and the outlet 3223 are located at the top of the heat exchange element 322 , and thus the first current collector 321 is also disposed at the top of the heat exchange unit 32 , which helps to shorten the connection path between the first current collector 321 and the heat exchange element 322 .

[0203] The first current collector 321 is sandwiched between two adjacent battery groups 12. Thus, the first current collector 321 can be used to support the space between the two adjacent battery groups 12 to form a storage space. The heat exchange element 322 is disposed in the storage space formed between the two adjacent battery groups 12. For example, when the battery cell assemblies 10 are grouped, the first current collector 321 can provide support.

[0204] In this embodiment, the first current collector 321 is sandwiched between two adjacent battery groups 12 so that the first current collector 321 is supported between the two adjacent battery groups 12 to form a receiving space, and the heat exchange element 322 is arranged in the receiving space formed between the two adjacent battery groups 12. In this way, the situation in which the heat exchange channel 3221 of the heat exchange element 322 is blocked due to the squeezing of the heat exchange element 322 by the two adjacent battery groups 12 can be improved to a certain extent, thereby improving the reliability of the heat exchange assembly 30.

[0205] In some embodiments, see Figures 4 to 8 Each heat exchange unit 32 includes two heat exchange elements 322 , and the inlets 3222 and outlets 3223 of the two heat exchange elements 322 are respectively arranged at one end of the two heat exchange elements 322 close to each other.

[0206] Here, each heat exchange unit 32 includes two heat exchange elements 322 . Exemplarily, the two heat exchange elements 322 are symmetrically arranged in a first direction with respect to a center line of the battery cell assembly 10 .

[0207] The ends of the two heat exchange elements 322 that are close to each other are the ends of the heat exchange elements 322 that are close to the center line of the battery cell assembly 10 along the first direction.

[0208] In this embodiment, by respectively arranging the inlet 3222 and the outlet 3223 of the two heat exchange components 322 at the ends of the two heat exchange components 322 close to each other, it is further beneficial to connect multiple heat exchange components 322 with the same first collector 321, which is convenient for assembly and further helps to simplify the structure of the heat exchange component 30.

[0209] In some embodiments, a dimension of the first current collector 321 in the second direction is greater than or equal to a dimension of the heat exchange element 322 in the second direction.

[0210] Here, the second direction is the thickness direction of the heat exchange element 322 .

[0211] It should be noted that the size of the first current collector 321 in the second direction refers to the size of the first current collector 321 in the second direction between two adjacent battery packs 12. For example, the size of the first current collector 321 in the second direction is the distance between the sides of the first conveying member 3224 and the second conveying member 3225 facing away from each other.

[0212] In this embodiment, by setting the size of the first current collector 321 in the second direction to be greater than or equal to the size of the heat exchange element 322 in the second direction, a sufficiently large accommodation space can be formed between two adjacent battery packs 12, which is further beneficial to improving the situation where the heat exchange element 322 is squeezed by two adjacent battery packs 12, resulting in blockage of the heat exchange flow channel 3221 of the heat exchange element 322, thereby further improving the reliability of the heat exchange assembly 30.

[0213] In some embodiments, the hardness of the first current collector 321 is greater than the hardness of the heat exchange element 322 .

[0214] Here, the greater the hardness of the first current collector 321 is, the harder it is to be deformed or damaged by squeezing.

[0215] In this embodiment, by setting the hardness of the first current collector 321 to be greater than the hardness of the heat exchange element 322 , the support strength of the first current collector 321 is improved, thereby further improving the reliability of the heat exchange assembly 30 .

[0216] In some embodiments, see Figures 5 to 11 The heat exchange unit 32 includes a support assembly 323 , which is sandwiched between two adjacent battery packs 12 .

[0217] The support assembly 323 is sandwiched between two adjacent battery packs 12. Thus, the support assembly 323 can be used to support the space between the two adjacent battery packs 12 to form a storage space. The heat exchange element 322 is disposed in the storage space formed between the two adjacent battery packs 12. For example, when the battery cell assemblies 10 are grouped, the support assembly 323 can provide support.

[0218] In some embodiments, the first current collector 321 may also be sandwiched between two adjacent battery groups 12, that is, the first current collector 321 and the support assembly 323 are jointly supported between the two adjacent battery groups 12, further improving the situation where the heat exchange element 322 is squeezed by the two adjacent battery groups 12; of course, the first current collector 321 can also be sandwiched between two adjacent battery groups 12, but it does not play a supporting role. For example, the size of the support assembly 323 in the second direction is greater than or equal to the size of the first current collector 321 in the second direction, which is conducive to making full use of the gap between the battery groups 12, thereby improving the energy density.

[0219] In other embodiments, the first current collector 321 may not be sandwiched between two adjacent battery groups 12, but may be located above the battery cell assembly 10. In this way, the support assembly 323 can provide support when the battery cell assemblies 10 are grouped.

[0220] In this embodiment, the support assembly 323 is clamped between two adjacent battery packs 12 so that the support assembly 323 is supported between the two adjacent battery packs 12 to form a receiving space, and the heat exchange element 322 is arranged in the receiving space formed between the two adjacent battery packs 12. In this way, the situation in which the heat exchange channel 3221 of the heat exchange element 322 is blocked due to the squeezing of the heat exchange element 322 by the two adjacent battery packs 12 can be improved to a certain extent, thereby improving the reliability of the heat exchange assembly 30.

[0221] It should be noted that the specific structure of the support assembly 323 is not limited herein. For example, at least a portion of the support assembly 323 is disposed at the edge of the heat exchanger 322, which is beneficial for protecting the heat exchanger 322 and improving the situation where the heat exchanger 322 is squeezed.

[0222] In some embodiments, see Figures 5 to 11 The support assembly 323 includes a first support member 3231 extending along a first direction. The first support member 3231 is disposed at at least one end of the heat exchange member 322 along a height direction.

[0223] Here, the first support member 3231 extends along the first direction, that is, the first support member 3231 extends in the same direction as the heat exchange member 322 , and is also in the same direction as the arrangement direction of the battery cells 11 in the battery pack 12 .

[0224] The first support member 3231 is arranged at at least one end of the heat exchange member 322 along the height direction, which means that the first support member 3231 can be arranged at the top of the heat exchange member 322, or at the bottom of the heat exchange member 322, and it also has the function of blocking the glue. The first support member 3231 can also be arranged at the top and bottom of the heat exchange member 322.

[0225] For example, the first support member 3231 disposed on the top of the heat exchange member 322 may be located between the heat exchange member 322 and the first current collector 321 .

[0226] Here, the first support member 3231 may be bonded or thermally melted to the heat exchange member 322 .

[0227] In this embodiment, the support assembly 323 includes a first support member 3231 extending along a first direction, that is, the first support member 3231 has the same extension direction as the heat exchange member 322 and the same arrangement direction as the battery cells 11 in the battery pack 12. This is beneficial for supporting the length direction of the heat exchange member 322 and limiting the battery cells 11 of the battery pack 12.

[0228] In some embodiments, see Figures 5 to 8 The support assembly 323 further includes a second support member 3232 extending along the height direction of the battery device 100 , and the second support member 3232 is located at at least one end of the first support member 3231 along the first direction.

[0229] The second support member 3232 being located at at least one end of the first support member 3231 along the first direction means that the second support member 3232 may be located at one end of the first support member 3231 along the first direction, or may be located at both ends of the first support member 3231 along the first direction.

[0230] Here, since the inlet 3222 and the outlet 3223 are located at the top of the heat exchanger 322, the inlet 3222 and outlet 3223 of the heat exchanger 322 extend upward for connection with the first current collector 321. Thus, the heat exchanger 322 is not supported by the first support member 3231 in the area of the inlet 3222 and outlet 3223.

[0231] In this embodiment, a second support member 3232 extending along the height direction of the battery device 100 is provided, and the second support member 3232 is located at one end of the first support member 3231 along the first direction, which is beneficial for supporting the area where the inlet 3222 and outlet 3223 of the heat exchange member 322 are located, and is also beneficial for limiting the battery cell 11 located in the area where the inlet 3222 and outlet 3223 of the heat exchange member 322 are located.

[0232] Here, the specific number of the second support members 3232 is not limited.

[0233] Exemplarily, there are two second support members 3232, one of which is located between the inlet 3222 and the outlet 3223 of the heat exchanger 322, and the other is located at one end of the heat exchanger 322 close to the adjacent heat exchanger 322, that is, the two second support members 3232 are respectively located at one end of the inlet 3222 and the outlet 3223 away from the first support member 3231.

[0234] In some embodiments, see Figures 6 and 7 The heat exchange member 322 has an avoidance groove 3226 , and at least a portion of the second support member 3232 is disposed in the avoidance groove 3226 .

[0235] Illustratively, an avoidance groove 3226 is defined between the inlet 3222 and the outlet 3223 of the heat exchange element 322 , wherein one of the second support members 3232 is disposed at the avoidance groove 3226 .

[0236] In some embodiments, see Figures 5 to 8 , the support assembly 323 corresponds to the heat exchange component 322 one by one.

[0237] The support components 323 correspond to the heat exchange components 322 on a one-to-one basis, that is, the number of the support components 323 is the same as the number of the heat exchange components 322 .

[0238] In this embodiment, by setting the support assembly 323 and the heat exchanger 322 in a one-to-one correspondence, it is beneficial to support and protect the heat exchanger 322 in a targeted manner, and the battery cell 11 corresponding to the heat exchanger 322 can be limited in a targeted manner, which can further improve the situation where the heat exchange channel 3221 of the heat exchanger 322 is blocked due to the squeezing of the heat exchanger 322 by two adjacent battery packs 12, thereby improving the reliability of the heat exchanger assembly 30.

[0239] In some embodiments, the dimension of the support assembly 323 in the second direction is greater than or equal to the dimension of the heat exchange element 322 in the second direction.

[0240] Here, the second direction is the thickness direction of the heat exchange element 322 .

[0241] It should be noted that the size of the support assembly 323 in the second direction refers to the size of the region of the support assembly 323 located between two adjacent battery packs 12 in the second direction.

[0242] In this embodiment, by setting the size of the support assembly 323 in the second direction to be greater than or equal to the size of the heat exchange element 322 in the second direction, a sufficiently large accommodation space can be formed between two adjacent battery packs 12, which is further beneficial to improving the situation where the heat exchange element 322 is squeezed by two adjacent battery packs 12, resulting in blockage of the heat exchange flow channel 3221 of the heat exchange element 322, thereby further improving the reliability of the heat exchange assembly 30.

[0243] In some embodiments, the dimension of the support component 323 in the second direction is greater than 0 and less than or equal to 10 mm.

[0244] For example, it is any one of the point values of 0.05mm, 0.1mm, 0.2mm, 0.5mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, and 10mm, or a point value between any two of them.

[0245] The size of the support assembly 323 in the second direction is generally identical or substantially identical to the size of the adjacent battery pack 12 in the second direction.

[0246] In this embodiment, by setting the size of the support assembly 323 in the second direction to be greater than 0 and less than or equal to 10 mm, the heat exchange component 322 can be supported in the longitudinal direction, and the battery cells 11 of the battery pack 12 can be limited while taking into account the energy density of the battery device 100.

[0247] In some embodiments, the hardness of the support assembly 323 is greater than the hardness of the heat exchange element 322 .

[0248] Here, the greater the hardness of the support component 323 is, the harder it is to be deformed or damaged by squeezing.

[0249] In this embodiment, by setting the hardness of the support assembly 323 to be greater than the hardness of the heat exchange component 322 , the support strength of the support assembly 323 is improved, thereby further improving the reliability of the heat exchange assembly 30 .

[0250] In some embodiments, the support element 323 is an insulating member.

[0251] Exemplarily, the flexible member is a layered structure, and the flexible member includes a metal layer and a non-metal layer, and the metal layer and the non-metal layer are stacked in sequence.

[0252] Exemplarily, the battery device 100 includes a tab disposed on the top of the battery cell assembly 10 .

[0253] In this embodiment, by setting the support component 323 as an insulating component, it is beneficial to improve the electrical conductivity between the support component 323 and the bar, heat exchange component 322, etc., and it is beneficial to improve the corrosion resistance of the support component 323.

[0254] Exemplarily, the support assembly 323 is a plastic component.

[0255] In some embodiments, the supporting component 323 is an insulating adhesive layer.

[0256] For example, adhesive is applied between the battery cell 11 and the heat exchange element 322 , and the adhesive is solidified to form an insulating adhesive layer.

[0257] In this embodiment, by setting the support component 323 as an insulating rubber layer, it is beneficial to improve the conductivity between the support component 323 and the bar, heat exchange component 322, etc., and it is beneficial to improve the corrosion resistance of the support component 323. At the same time, the heat exchange component 322, the battery cell 11 and the support component 323 can also be bonded together, thereby improving the connection stability of the heat exchange component 322, the battery cell 11 and the support component 323, thereby improving the reliability of the battery device 100.

[0258] In some embodiments, at least two flexible members are configured as metal plasticized films.

[0259] The flexible part is a single-layer or multi-layer film.

[0260] Here, the metal-plasticized film is a metal-plastic composite material, that is, it includes a metal layer and a plastic layer.

[0261] In this embodiment, the thin and lightweight metal-plasticized film, coupled with the heat exchange channel 3221 formed between at least two metal-plasticized films, is unaffected by the extrusion process and eliminates the need for high thickness requirements. This reduces the overall thickness and weight of the heat exchange assembly 30. Furthermore, the insulating properties of the metal-plasticized film reduce the risk of insulation failure. This reduces the risk of reaction between the heat exchange assembly 30 and the heat exchange medium flowing therein, further minimizing the risk of corrosion and leakage of the heat exchange medium.

[0262] Exemplarily, at least two flexible members are configured as aluminum-plastic films.

[0263] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0264] In some embodiments, the flexible member is a layered structure, and the flexible member includes a metal layer and a non-metal layer, and the metal layer and the non-metal layer are stacked in sequence.

[0265] Here, the flexible component includes a metal layer and a non-metal layer, that is, a composite material component composed of the metal layer and the non-metal layer.

[0266] For example, the metal layer and the non-metal layer may be formed by hot pressing or hot melting.

[0267] Here, the number of metal layers and non-metal layers is not limited.

[0268] In this embodiment, the flexible member, comprised of a stack of metal and non-metal layers, is thin and lightweight. Furthermore, by forming a heat exchange channel 3221 between at least two flexible members, it is unaffected by the extrusion process and eliminates the need for a high thickness requirement, thereby reducing the overall thickness and weight of the heat exchange assembly 30. Furthermore, the heat exchange assembly 30 does not react with the heat exchange medium flowing therein, eliminating the risk of corrosion or leakage.

[0269] In some embodiments, the metal layer includes one of aluminum foil, copper foil, and steel foil.

[0270] By setting the metal layer to be one of aluminum foil, copper foil and steel foil, the flexible component can have a certain structural strength and can play an isolation role.

[0271] In some embodiments, the non-metallic layer includes one of polypropylene, polyvinyl chloride, and polyethylene.

[0272] By setting the non-metallic layer to be one of polypropylene, polyvinyl chloride and polyethylene, the flexible component can have a certain waterproof effect.

[0273] For example, a non-metallic layer made of a corrosion-resistant material having acid and alkali corrosion resistance may be selected, or in other words, additives may be added to the non-metallic layer to make the non-metallic layer have acid and alkali corrosion resistance.

[0274] In some embodiments, the non-metallic layer is a hot melt layer.

[0275] Here, by setting the non-metallic layer as a hot-melt layer, that is, composed of a hot-melt material, it is advantageous to combine the non-metallic layer and the metal layer through hot melting, which makes molding simple and the production efficiency high.

[0276] In some embodiments, the flexible member is a layered structure, and the flexible member includes a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged in sequence. The waterproof layer is closer to the heat exchange channel 3221 than the corrosion-resistant layer.

[0277] Here, the corrosion-resistant layer may be a nylon layer formed of nylon material, thereby having certain corrosion resistance, such as acid and alkali corrosion resistance.

[0278] The isolation layer may be a metal layer, and the metal layer may be configured as one of aluminum foil, copper foil and steel foil, which can provide the flexible component with a certain structural strength and play an isolation role.

[0279] The waterproof layer may be a non-metallic layer, and the non-metallic layer may be configured to be one of polypropylene, polyvinyl chloride and polyethylene, so that the flexible component may have a certain waterproof effect.

[0280] In this embodiment, by configuring the flexible member to include a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged in sequence, the waterproof layer is closer to the heat exchange channel 3221 than the corrosion-resistant layer, which is beneficial to improving the reliability of the heat exchange assembly 30.

[0281] In some embodiments, the isolation layer has a thickness of 6.5 μm to 100 μm.

[0282] The thickness of the isolation layer can be any one of 6.5μm, 10μm, 15μm, 20μm, 25μm, 30μm, 35μm, 38μm, 40μm, 45μm, 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 92μm, 95μm, 100μm or any value between two of them.

[0283] In this embodiment, by setting the thickness of the isolation layer to 6.5 μm-100 μm, the flexible member can have a certain structural strength and flexibility.

[0284] In some embodiments, the isolation layer has a thickness of 6.5 μm to 15 μm.

[0285] The thickness of the isolation layer can be any one of 6.5μm, 7μm, 7.5μm, 7.8μm, 8μm, 8.3μm, 8.5μm, 8.8μm, 9μm, 9.2μm, 9.5μm, 9.7μm, 10μm, 10.3μm, 10.5μm, 10.8μm, 11μm, 11.5μm, 11.8μm, 12μm, 12.3μm, 12.5μm, 13μm, 13.5μm, 14μm, 14.5μm, 15μm or any value between any two of them.

[0286] In this embodiment, by setting the thickness of the isolation layer to 6.5 μm-15 μm, the flexible member can further have a certain structural strength and flexibility.

[0287] In some embodiments, the corrosion-resistant layer has a thickness of 5 μm to 20 μm.

[0288] The thickness of the corrosion-resistant layer can be 5μm, 5.5μm, 5.8μm, 6μm, 6.5μm, 7μm, 7.5μm, 7.8μm, 8μm, 8.3μm, 8.5μm, 8.8μm, 9μm, 9.2μm, 9.5μm, 9.7μm, 10μm, 10.3μm, 10.5μm, 10.8μm, 11μm, 11.5μm, 11. Any one of the point values of 8μm, 12μm, 12.3μm, 12.5μm, 13μm, 13.5μm, 14μm, 14.5μm, 15μm, 15.5μm, 16μm, 16.5μm, 17μm, 17.5μm, 18μm, 18.5μm, 18.7μm, 19μm, 19.5μm, 20μm or any point value between any two of them.

[0289] In this embodiment, by setting the thickness of the corrosion-resistant layer to 5 μm-20 μm, the wear resistance and toughness of the flexible component can be improved.

[0290] In some embodiments, the waterproof layer has a thickness of 50 μm to 120 μm.

[0291] The thickness of the waterproof layer can be any one of 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 92μm, 95μm, 100μm, 105μm, 108μm, 110μm, 115μm, 120μm or any value between two of them.

[0292] In this embodiment, by setting the thickness of the waterproof layer to 50 μm-120 μm, the waterproof layer can have a certain structural strength, improve the waterproof performance, and facilitate hot pressing connection of the flexible parts through the waterproof layer.

[0293] In some embodiments, the thickness of the flexible member is 0.05 mm to 0.3 mm.

[0294] For example, it is any one of 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.15mm, 0.2mm, 0.21mm, 0.22mm, 0.25mm, 0.27mm, 0.28mm, and 0.3mm, or a point value between any two of them.

[0295] In this embodiment, by setting the thickness of the flexible part to 0.05mm-0.3mm, the heat exchange component 30 made of the flexible part has a certain structural strength while the overall thickness of the heat exchange component 30 is smaller, which is beneficial to reducing the overall volume and weight of the battery device 100 and increasing the energy density of the battery device 100.

[0296] In some embodiments, the thickness of the flexible member is 0.08 mm to 0.2 mm.

[0297] For example, it is any one of 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, and 0.2mm, or a point value between any two of them.

[0298] In this embodiment, by setting the thickness of the flexible part to 0.08mm-0.2mm, the heat exchange component 30 made of the flexible part has a certain structural strength, and the overall thickness of the heat exchange component 30 is further made smaller, which is beneficial to further reduce the overall volume and weight of the battery device 100, so as to further increase the energy density of the battery device 100.

[0299] In some embodiments, the elastic modulus of the flexible member is 0.1 MPa-10000 MPa.

[0300] Exemplarily, the elastic modulus of the flexible part can be any one of 0.1 MPa, 1 MPa, 50 MPa, 100 MPa, 150 MPa, 200 MPa, 300 MPa, 500 MPa, 800 MPa, 1000 MPa, 1300 MPa, 1500 MPa, 1800 MPa, 2000 MPa, 2500 MPa, 2800 MPa, 3000 MPa, 3500 MPa, 4000 MPa, 4500 MPa, 5000 MPa, 5500 MPa, 6000 MPa, 6500 MPa, 7000 MPa, 7500 MPa, 8000 MPa, 8500 MPa, 8800 MPa, 9000 MPa, 9500 MPa, 9700 MPa, and 10000 MPa, or any point value between any two of them.

[0301] The elastic modulus describes the unit strain caused by unit stress when a solid is subjected to a certain force range. It is one of the fundamental physical quantities of a material. The larger the elastic modulus, the greater the material's stiffness and compressive resistance. The elastic modulus is a physical quantity that describes the elasticity of a material.

[0302] In this embodiment, by setting the elastic modulus of the flexible part to 0.1MPa-10000MPa, the flexible part has a certain structural strength, thereby improving the reliability of the heat exchange component 30, and has a certain deformation ability, which can improve the fit between the heat exchange component 30 and the box component 20 and / or the battery pack 12 battery cell components 10, thereby increasing the effective heat exchange area between the heat exchange component 30 and the box component 20 and / or the battery pack 12 battery cell components 10, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange component 30.

[0303] In one specific embodiment, the flexible member 31 has a layered structure, comprising a corrosion-resistant layer, an isolation layer, and a waterproof layer, arranged in sequence. The waterproof layer is closer to the medium flow channel 32 than the corrosion-resistant layer. The isolation layer has a thickness of 6.5 μm to 15 μm. The corrosion-resistant layer has a thickness of 5 μm to 20 μm. The waterproof layer has a thickness of 50 μm to 120 μm. The flexible member 31 has a thickness of 0.05 mm to 0.3 mm. The elastic modulus of the flexible member 31 is 0.1 MPa to 10,000 MPa.

[0304] It should be noted that the size of the support assembly in the second direction can be measured by a vernier caliper before assembly; the thickness of the corrosion-resistant layer, the isolation layer and the waterproof layer can be measured by a vernier caliper; the thickness of the flexible part 31 can be measured by a vernier caliper before assembly. It should be noted that the above measurements can all be carried out at normal temperature and pressure.

[0305] The elastic modulus of the flexible member 31 may be measured by at least one of a static tensile test method, a dynamic test method, a sonic velocity method, a nanoindentation method, and a bending method. The measuring instrument may include a nanoindenter and a universal testing machine.

[0306] For example, the elastic modulus of the flexible member 31 can be measured at room temperature and pressure by nanoindentation. The nanoindentation method uses a tiny indenter to indent the surface of the flexible member 31 and calculates the elastic modulus by analyzing the relationship between the indentation depth and the load.

[0307] In the description of this application, the descriptions with reference to the terms "in one embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine different embodiments or examples described in this application and features of different embodiments or examples, unless they are mutually inconsistent.

[0308] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application are intended to be within the scope of protection of the present application.

Claims

1. A battery device, characterized in that: include: A box assembly having an accommodating cavity therein; A battery cell assembly is disposed in the accommodating cavity; A heat exchange assembly is arranged in the accommodating cavity, wherein the heat exchange assembly includes at least two flexible parts, the at least two flexible parts are stacked, and a heat exchange channel is formed between the flexible parts, the heat exchange channel is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the battery cell assembly.

2. The battery device according to claim 1, wherein: The battery cell assembly includes a plurality of battery cells, and the heat exchange assembly is located between the battery cells.

3. The battery device according to claim 1, wherein: The battery cell assembly includes multiple battery cells, each of which includes multiple side surfaces, including a first side surface, which is the side surface with the smallest area among the multiple side surfaces, wherein the heat exchange assembly is located on one side of the first side surface of the battery cell.

4. The battery device according to claim 1, wherein: The battery cell assembly includes at least one battery pack, the battery pack includes a plurality of battery cells arranged along a first direction, the heat exchange assembly is provided on at least one side of the battery pack along a second direction, and the first direction intersects the second direction.

5. The battery device according to claim 4, characterized in that The battery cell assembly includes multiple battery groups, and the multiple battery groups are arranged along the second direction; the battery cell includes multiple side surfaces, and the multiple side surfaces include a first side surface, which is the side surface with the smallest area among the multiple side surfaces, and the first direction is parallel to the first side surface.

6. The battery device according to claim 4, characterized in that The heat exchange assembly includes at least one heat exchange unit, which includes a first current collector and a plurality of heat exchange elements arranged along the first direction. The heat exchange elements have the heat exchange flow channels, and the plurality of heat exchange elements are all connected to the first current collector.

7. The battery device according to claim 6, characterized in that The heat exchange assembly includes a second current collector and a plurality of heat exchange units arranged along a second direction, and the first current collectors of the plurality of heat exchange units are all in communication with the second current collector.

8. The battery device according to claim 6, characterized in that The heat exchange element has an inlet and an outlet, and both the inlet and the outlet are connected to the heat exchange channel; the inlet of the same heat exchange unit is located on the same side of the heat exchange unit along the second direction, and the outlet of the same heat exchange unit is located on the same side of the heat exchange unit along the second direction.

9. The battery device according to claim 8, characterized in that The first current collector includes a first conveying member and a second conveying member, which are arranged on opposite sides of the heat exchange unit along the second direction. The first conveying member is connected to the inlet of the heat exchange unit, and the second conveying member is connected to the outlet of the heat exchange unit.

10. The battery device according to claim 6, characterized in that The battery cell assembly includes a plurality of battery groups, the plurality of battery groups are arranged along the second direction, and the first current collector is sandwiched between two adjacent battery groups.

11. The battery device according to claim 10, characterized in that The size of the first current collector in the second direction is greater than or equal to the size of the heat exchange element in the second direction.

12. The battery device according to claim 10, wherein: The hardness of the first current collector is greater than the hardness of the heat exchange element.

13. The battery device according to claim 8, characterized in that Each of the heat exchange units includes two heat exchange elements, and the inlets and outlets of the two heat exchange elements are arranged at ends of the two heat exchange elements that are close to each other.

14. The battery device according to claim 6, characterized in that The heat exchange unit includes a support assembly, and the support assembly is sandwiched between two adjacent battery packs.

15. The battery device according to claim 14, characterized in that The support assembly includes a first support member extending along the first direction, and the first support member is arranged at at least one end of the heat exchange member along the height direction.

16. The battery device according to claim 15, characterized in that The support assembly further includes a second support member extending along a height direction of the battery device, wherein the second support member is located at one end of the first support member along the first direction.

17. The battery device according to claim 16, characterized in that The heat exchange member is provided with an avoidance groove, and at least a portion of the second support member is arranged in the avoidance groove.

18. The battery device according to claim 14, wherein: The supporting components correspond to the heat exchange components on a one-to-one basis.

19. The battery device according to claim 14, wherein: The dimension of the support assembly in the second direction is greater than or equal to the dimension of the heat exchange element in the second direction.

20. The battery device according to claim 14, wherein: The dimension of the support component in the second direction is greater than 0 and less than or equal to 10 mm.

21. The battery device according to claim 14, wherein: The hardness of the supporting assembly is greater than the hardness of the heat exchange element.

22. The battery device according to claim 14, wherein: The supporting component is an insulating member.

23. The battery device according to claim 22, characterized in that The supporting component is a plastic part.

24. The battery device according to claim 14, wherein: The supporting component is an insulating rubber layer.

25. The battery device according to claim 1, wherein: The at least two flexible members are configured as metal plasticized films.

26. The battery device according to claim 25, characterized in that The at least two flexible members are configured as aluminum-plastic films.

27. The battery device according to any one of claims 1 to 26, characterized in that: The flexible member is a layered structure, comprising a metal layer and a non-metal layer, wherein the metal layer and the non-metal layer are stacked in sequence.

28. The battery device according to claim 27, characterized in that The metal layer includes one of aluminum foil, copper foil and steel foil.

29. The battery device according to claim 27, wherein: The non-metallic layer includes one of polypropylene, polyvinyl chloride and polyethylene.

30. The battery device according to claim 27, wherein: The non-metallic layer is a hot-melt layer.

31. The battery device according to any one of claims 1 to 26, characterized in that: The flexible member is a layered structure, and includes a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged in sequence. The waterproof layer is closer to the heat exchange channel than the corrosion-resistant layer.

32. The battery device according to claim 31, wherein: The thickness of the isolation layer is 6.5 μm-100 μm.

33. The battery device according to claim 32, characterized in that The thickness of the isolation layer is 6.5 μm-15 μm.

34. The battery device according to claim 31, wherein: The thickness of the corrosion-resistant layer is 5 μm-20 μm.

35. The battery device according to claim 31, wherein: The thickness of the waterproof layer is 50 μm-120 μm.

36. The battery device according to any one of claims 1 to 26, characterized in that: The thickness of the flexible member is 0.05mm-0.3mm.

37. The battery device according to claim 36, characterized in that The thickness of the flexible member is 0.08 mm to 0.2 mm.

38. The battery device according to any one of claims 1 to 26, characterized in that: The elastic modulus of the flexible member is 0.1 MPa-10000 MPa.

39. A heat exchange component, characterized in that: The heat exchange component is the heat exchange component of the battery device according to any one of claims 1 to 38, and the heat exchange component is used to exchange heat with the battery cell assembly.

40. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1-38 or the heat exchange component according to claim 39.

41. An energy storage device, characterized in that: Comprising the battery device according to any one of claims 1-38 or the heat exchange component according to claim 39.

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