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

Abstract

The embodiment of the invention 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 device, in particular to a heat exchange assembly, a battery device, an electric equipment and an energy storage equipment. BACKGROUND

[0002] This section is intended to provide background or context to the embodiments of the application. The description herein does not constitute admission that the prior art is prior art nor does it constitute an admission of any description in this section as prior art to an application described herein and / or combinations of such prior art.

[0003] In a new energy vehicle equipped with a battery, the battery can be used to provide power in whole or in part. During use of the battery, the battery cells in the battery generate heat. If the heat is too high, it will adversely affect the performance and service life of the battery. Therefore, how to effectively dissipate heat from the battery cells of the battery has become an important research direction in the art. SUMMARY

[0004] Therefore, the embodiments of the present application aim to provide a heat exchange assembly, a battery device, an electric equipment and an energy storage equipment to solve the technical problem of how to improve the heat exchange effect.

[0005] To this end, a first aspect of the embodiments of the present application provides a battery device, comprising:

[0006] a box assembly having an accommodation cavity inside;

[0007] a battery cell assembly arranged in the accommodation cavity;

[0008] a heat exchange assembly arranged in the accommodation cavity, wherein the heat exchange assembly comprises at least two flexible members, the at least two flexible members are arranged in layers, and a heat exchange flow channel is formed between the flexible members, the heat exchange flow channel is used to guide a heat exchange medium, and the heat exchange medium is used to exchange heat with the battery cell assembly.

[0009] The battery device provided by the embodiment of the present application comprises a box assembly, a battery monomer assembly and a heat exchange assembly. The battery monomer assembly is arranged in the accommodating cavity of the box assembly, and the box assembly protects the battery monomer assembly. By arranging the heat exchange assembly in the accommodating cavity, that is, arranging the heat exchange assembly and the battery monomer assembly in the same space, the heat exchange efficiency of the heat exchange assembly and the battery monomer assembly can be improved. In addition, the heat exchange assembly is arranged to comprise a flexible member. The flexible member has a relatively light mass, which is beneficial to reducing the mass 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 has a flexible structure, which can make the heat exchange assembly better fit the box assembly and / or the battery monomer assembly, thereby being beneficial to absorbing the assembly tolerance of the heat exchange assembly, eliminating the need to use a caulking agent or a heat-conducting material, improving the fit of the heat exchange assembly, the box assembly and / or the battery monomer assembly, increasing the effective heat exchange area between the heat exchange assembly, the box assembly and / or the battery monomer assembly, and thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly.

[0010] In some embodiments, the battery monomer assembly comprises a plurality of battery monomers, and the heat exchange assembly is located between the battery monomers.

[0011] This is beneficial to improving the overall rigidity of the battery device, thereby improving the reliability of the battery device. In addition, by arranging the heat exchange assembly between the battery monomers, the contact area between the heat exchange assembly and the battery monomers can be improved, thereby improving the heat exchange efficiency and heat exchange effect.

[0012] In some embodiments, the battery monomer assembly comprises a plurality of battery monomers, and the battery monomers comprise a plurality of side surfaces, the plurality of side surfaces comprising a first side surface, the first side surface being the side surface with the smallest area among the plurality of side surfaces, and the heat exchange assembly is located on one side of the first side surface of the battery monomers.

[0013] In this embodiment, by arranging the heat exchange assembly on one side of the first side surface of the battery monomers, the contact area between the heat exchange assembly and the battery monomers can be improved, thereby improving the heat exchange efficiency and heat exchange effect, and at the same time, the situation that the battery monomers press the heat exchange assembly due to expansion during use of the battery device can be improved, thereby improving the reliability of the heat exchange assembly.

[0014] In some embodiments, the battery monomer assembly comprises at least one battery pack, the battery pack comprises a plurality of battery monomers arranged in a first direction, and the battery pack is provided with the heat exchange assembly on at least one side in a second direction, and the first direction intersects the second direction.

[0015] That is, the heat exchange assembly is not arranged at the bottom of the battery monomer, which is beneficial to improve the overall rigidity of the battery device, thereby improving the reliability of the battery device. 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 monomer assembly can be increased, thereby improving the heat exchange efficiency and heat exchange effect.

[0016] In some embodiments, the battery monomer assembly includes a plurality of battery packs arranged along the second direction; the battery monomer includes a plurality of sides, and the plurality of sides includes a first side, which is the smallest side among the plurality of sides, and the first direction is parallel to the first side.

[0017] In this embodiment, by arranging the heat exchange assembly on one side of the first side of each battery monomer of the battery pack, the contact area between the heat exchange assembly and the battery monomer can be increased, thereby improving the heat exchange efficiency and heat exchange effect, and at the same time, the situation that the battery monomer is pressed against the heat exchange assembly due to expansion during use of the battery device can be improved, thereby improving the reliability of the heat exchange assembly.

[0018] In some embodiments, the heat exchange assembly includes at least one heat exchange unit, and the heat exchange unit includes a first current collector and a plurality of heat exchange pieces arranged along the first direction, and the heat exchange pieces have the heat exchange flow channel, and the plurality of heat exchange pieces are in communication with the first current collector.

[0019] In this embodiment, by arranging the heat exchange unit to include a plurality of heat exchange pieces arranged along the first direction, the arrangement direction of the heat exchange pieces in the heat exchange unit is the same as the arrangement direction of the battery monomers in the battery pack, which is beneficial to increase the contact area, thereby improving the heat exchange efficiency; at the same time, by arranging the plurality of heat exchange pieces to be in communication with the first current collector, that is, each heat exchange piece is collected by the same first current collector, which is beneficial to simplify the structure of the heat exchange assembly, reduce the cost, 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 the second direction, and the first current collectors of the plurality of heat exchange units are in communication with the second current collector.

[0021] In this embodiment, by arranging the heat exchange assembly to include a plurality of heat exchange units arranged along the second direction, the arrangement direction of the heat exchange units is the same as the arrangement direction of the battery pack, which is beneficial to increase the contact area between the heat exchange assembly and the battery monomer assembly, thereby improving the heat exchange efficiency; at the same time, by arranging the first current collectors of the plurality of heat exchange units to be in communication with the second current collector, that is, each first current collector is collected by the same second current collector, which is beneficial to further simplify the structure of the heat exchange assembly, reduce the cost, and improve the energy density of the battery device.

[0022] In some embodiments, the heat exchanger has an inlet and an outlet, both of which are in communication with 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 placing the inlet of the same heat exchange unit on the same side of the heat exchange unit along the second direction and the outlet of the same heat exchange unit on the same side of the heat exchange unit along the second direction, that is, by setting the inlet and outlet of the same heat exchange unit on opposite sides of the heat exchange unit along the second direction, it is beneficial to connect multiple heat exchange components to the same first collector, which facilitates assembly and simplifies 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 being disposed on opposite sides of the heat exchange unit along the second direction, the first conveying member being connected to the inlet of the heat exchange unit, and the second conveying member being 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 located on opposite sides of the heat exchange unit along the second direction, by setting 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 facilitates assembly and simplifies the structure of the heat exchange assembly.

[0026] In some embodiments, the battery cell assembly includes multiple battery packs arranged along the second direction, and the first current collector is sandwiched between two adjacent battery packs.

[0027] In this embodiment, by sandwiching the first current collector between two adjacent battery packs, the first current collector is supported between the two adjacent battery packs to form a receiving space. The heat exchanger is disposed in the receiving space formed between the two adjacent battery packs. In this way, the blockage of the heat exchanger channel caused by the two adjacent battery packs squeezing the heat exchanger can be improved to a certain extent, thereby improving the reliability of the heat exchange assembly.

[0028] In some embodiments, the dimension of the first current collector in the second direction is greater than or equal to the dimension of the heat exchanger 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 exchanger in the second direction, a sufficiently large accommodating space can be formed between two adjacent battery packs. This further helps to improve the situation where the heat exchanger is squeezed by two adjacent battery packs, which leads to blockage of the heat exchanger flow channel, thereby further improving the reliability of the heat exchange assembly.

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

[0031] In this embodiment, by setting the hardness of the first current collector to be greater than that of the heat exchange component, it is beneficial to improve the support strength of the first current collector, thereby further improving the reliability of the heat exchange component.

[0032] In some embodiments, each heat exchange unit includes two heat exchange elements, with the inlet and outlet of the two heat exchange elements located at one end of the two heat exchange elements close to each other.

[0033] In this embodiment, by setting the inlet and outlet of the two heat exchangers at the ends of the two heat exchangers that are close to each other, it is further beneficial to connect multiple heat exchangers to the same first collector, which facilitates assembly and further simplifies the structure of the heat exchange assembly.

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

[0035] In this embodiment, by sandwiching the support component between two adjacent battery packs, the support component is supported between the two adjacent battery packs to form a receiving space. The heat exchanger is disposed in the receiving space formed between the two adjacent battery packs. In this way, the blockage of the heat exchanger channel caused by the two adjacent battery packs squeezing the heat exchanger can be improved to a certain extent, thereby improving the reliability of the heat exchanger component.

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

[0037] In this embodiment, by including a first support member extending along a first direction in the support assembly, i.e., the first support member extends in the same direction as the heat exchange member and in the same direction as the arrangement of the battery cells in the battery pack, it is beneficial to support the length direction of the heat exchange member and to limit the position of the battery cells in the battery pack.

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

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

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

[0041] For example, a clearance groove is provided between the inlet and outlet of the heat exchanger, and a second support member is provided at the clearance groove.

[0042] In some embodiments, the support components correspond one-to-one with the heat exchanger components.

[0043] In this embodiment, by setting the support components and heat exchange components to correspond one-to-one, it is beneficial to provide targeted support and protection for the heat exchange components, and to specifically limit the battery cells corresponding to the heat exchange components. This can further improve the situation where the heat exchange channels of the heat exchange components are blocked due to the compression of the heat exchange components by two adjacent battery packs, thereby improving the reliability of the heat exchange components.

[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 exchanger in the second direction.

[0045] This allows for a sufficiently large space between two adjacent battery packs, which further helps to improve the situation where adjacent battery packs squeeze the heat exchanger, causing blockage of the heat exchanger channels, thereby further improving the reliability of the heat exchanger assembly.

[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 exchanger along its length, limit the position of individual battery cells in the battery pack, and also take into account the energy density of the battery device.

[0048] In some embodiments, the hardness of the support component is greater than the hardness of the heat exchanger.

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

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

[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 heat exchange components, and also to improve the corrosion resistance of the support component.

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

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

[0054] In this embodiment, by setting the support component as an insulating adhesive layer, it is beneficial to improve the conductivity between the support component and the battery plate, heat exchanger, etc., and to improve the corrosion resistance of the support component. At the same time, it can also make the heat exchanger, battery cell and support component bonded together, improve the connection stability of the heat exchanger, battery cell and support component, and thus improve the reliability of the battery device.

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

[0056] In this embodiment, because the metal plasticized film is thin and lightweight, and because a flow channel region is formed between at least two metal plasticized films, it is not affected by the extrusion process and does not need to meet a large thickness requirement. Therefore, the overall thickness and weight of the heat exchange assembly can be reduced. Furthermore, the heat exchange assembly does not react with the internally flowing heat exchange medium, thus eliminating the risk of corrosion and leakage.

[0057] In some embodiments, the at least two flexible elements 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 element is a layered structure, comprising a metal layer and a non-metal layer, wherein the metal layer and the non-metal layer are stacked sequentially.

[0060] In this embodiment, the flexible component, composed of sequentially stacked metal and non-metal layers, is thin and lightweight. Furthermore, by forming a flow channel region between at least two flexible components, it is unaffected by the extrusion process and does not need to meet large thickness requirements, thus reducing the overall thickness and weight of the heat exchange assembly. In addition, the heat exchange assembly does not react with the internally flowing heat exchange medium, therefore eliminating the risk of corrosion and leakage.

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

[0062] This allows flexible components to have a certain structural strength and to serve as an isolation mechanism.

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

[0064] This allows flexible components to have a certain degree of waterproofing.

[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, a hot-melt material, it is advantageous to combine the non-metallic layer and the metallic layer together through hot melting, which is simple to form and has high production efficiency.

[0067] In some embodiments, the flexible element has a layered structure, comprising a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged sequentially, wherein the waterproof layer is closer to the flow channel region than the corrosion-resistant layer.

[0068] In this embodiment, by configuring the flexible component to include a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged sequentially, the waterproof layer is closer to the flow channel area than the corrosion-resistant layer, which helps to improve 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 6.5μm-100μm, the flexible component 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 6.5μm-15μm, the flexible component can be further made to have a certain structural strength and flexibility.

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

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

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

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

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

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

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

[0080] By setting the thickness of the flexible component to 0.08mm-0.2mm, the heat exchange assembly made of the flexible component has a certain structural strength, while further reducing the overall thickness of the heat exchange assembly. This is beneficial to further reduce 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 element is 0.1 MPa-10000 MPa.

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

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

[0084] The heat exchange assembly provided in this embodiment is beneficial for improving the heat exchange efficiency between the heat exchange assembly and the battery cell assembly. Furthermore, the heat exchange assembly includes a flexible component, which is lightweight, thus reducing the weight of the battery device, lowering the production cost of the heat exchange assembly, and increasing the energy density of the battery device. In addition, the flexible component has a flexible structure, allowing for better fit between the heat exchange assembly and the housing assembly and / or the battery cell assembly. This helps to absorb assembly tolerances of the heat exchange assembly, eliminating the need for sealants or thermally conductive materials, improving the fit between the heat exchange assembly and the housing assembly and / or the battery cell assembly, and increasing the effective heat exchange area between them, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly.

[0085] A third aspect of this disclosure provides an electrical device, including the battery device or the heat exchange component described above.

[0086] The battery device of the electrical equipment provided in this disclosure includes a housing assembly, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is disposed within the housing cavity of the housing assembly, which protects the battery cell assembly. By also disposing of the heat exchange assembly within the housing cavity, i.e., placing 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 includes a flexible component, which is lightweight, thus reducing the weight of the battery device, lowering the production cost of the heat exchange assembly, and improving the energy density of the battery device. Furthermore, the flexible component has a flexible structure, which allows the heat exchange assembly to fit better with the housing assembly and / or the battery cell assembly, thereby absorbing the assembly tolerances of the heat exchange assembly. It eliminates the need for sealants or thermally conductive materials, improving the fit between the heat exchange assembly and the housing assembly and / or the battery cell assembly, increasing the effective heat exchange area between the heat exchange assembly and the housing assembly and / or the battery cell assembly, and thus improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly.

[0087] A fourth aspect of this disclosure provides an energy storage device, including the battery device or the heat exchange component described above.

[0088] The battery device of the energy storage device provided in this disclosure includes a housing assembly, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is disposed within the housing cavity of the housing assembly, which protects the battery cell assembly. By also disposing of the heat exchange assembly within the housing cavity, i.e., placing 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 includes a flexible component, which is lightweight, thus reducing the weight of the battery device, lowering the production cost of the heat exchange assembly, and improving the energy density of the battery device. Furthermore, the flexible component has a flexible structure, which allows the heat exchange assembly to fit better with the housing assembly and / or the battery cell assembly, thereby absorbing the assembly tolerances of the heat exchange assembly. It eliminates the need for sealants or thermally conductive materials, improving the fit between the heat exchange assembly and the housing assembly and / or the battery cell assembly, increasing the effective heat exchange area between the heat exchange assembly and the housing assembly and / or the battery cell assembly, and thus improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly. Attached Figure Description

[0089] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application;

[0090] Figure 2 This is an exploded perspective view of a battery device provided in an embodiment of this application;

[0091] Figure 3 This is a schematic diagram of the structure of the second housing portion provided in an embodiment of this application;

[0092] Figure 4 This is a schematic diagram of the structure of a battery pack and a heat exchange unit provided in an embodiment of this application;

[0093] Figure 5 for Figure 4 Exploded view;

[0094] Figure 6 This is a schematic diagram of the structure of a heat exchange unit provided in an embodiment of this application;

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

[0096] Figure 8 for Figure 6 Exploded view;

[0097] Figure 9 This is a schematic diagram of the structure of a battery cell assembly and a heat exchange assembly provided in an embodiment of this application;

[0098] Figure 10 for Figure 9 Sectional view in the middle BB direction

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

[0100] Explanation of reference numerals in the attached figures

[0101] 10. Battery cell assembly; 11. Battery cell; 111. First side; 12. Battery pack; 20. Housing assembly; 21. Housing body; 211. First housing section; 212. Second housing section; 22. Expansion beam; 23. Receiving cavity; 30. Heat exchange assembly; 32. Heat exchange unit; 321. First current collector; 322. Heat exchange component; 3221. Heat exchange channel; 3222. Inlet; 3223. Outlet; 3224. First conveyor; 3225. Second conveyor; 3226. Clearance groove; 323. Support assembly; 3231. First support; 3232. Second support; 100. Battery device; 200. Controller; 300. Motor; 1000. Vehicle. Detailed Implementation

[0102] Unless otherwise specified, all embodiments and optional embodiments of this disclosure can be combined to form new technical solutions.

[0103] Unless otherwise specified, all technical features and optional technical features of this disclosure can be combined to form new technical solutions.

[0104] With the development of clean energy, more and more devices are using electricity as their driving force, leading to the rapid development of power batteries, such as lithium-ion batteries, which can store a large amount of electrical energy and can be repeatedly charged and discharged. These power 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 cars, as well as in aerospace and other fields.

[0105] In this embodiment of the disclosure, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0106] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments disclosed herein are not limited to this.

[0107] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract 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 can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0109] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0110] In some implementations, the electrode assembly is a stacked structure.

[0111] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0112] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0113] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0114] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0115] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

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

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

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

[0119] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This disclosure does not impose any particular limitations.

[0120] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also have one or more.

[0121] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0122] In some embodiments, energy storage devices include energy storage containers, energy storage cabinets, etc.

[0123] Power plants are demanding increasingly higher energy density from the surface area of ​​energy storage containers. Consequently, to increase power output, the weight of these containers also increases. However, these containers need to be transported from the production site to the usage site via land and / or sea transport. Land and sea transport typically have weight restrictions, creating a conflict between increasing energy density and the weight of energy storage containers.

[0124] During the use of a battery device, the individual battery cells generate heat. Excessive heat can negatively impact the performance and lifespan of the battery device. Therefore, effectively dissipating heat from the battery cells has become an important research direction in this field. Related technologies utilize a cooling system installed within the battery device housing to cool the individual battery cells. This cooling system may include multiple aluminum water-cooled plates laid within the battery device housing, with the surfaces of these plates in contact with the surfaces of the individual battery cells. During use, a heat exchange medium, such as water, flows through these water-cooled plates, carrying away heat from the battery cells and cooling them down. However, when the aluminum water-cooled plates in the cooling system do not adhere well to the surfaces of the battery cells, the heat exchange efficiency and effect are poor. Furthermore, assembly tolerance compensation and the use of sealant are required during assembly with the battery cell assembly, resulting in higher production costs. In addition, the water-cooling plate and battery pack are highly rigid and require the use of hard structural adhesive, making disassembly difficult. If self-adhesive, soft, or double-sided adhesive is used, the rigidity of the water-cooling plate and battery pack is relatively good, but when there are gaps and mismatches in flatness, there will be problems with the adhesive coming unglued.

[0125] Therefore, in order to improve the heat exchange efficiency and effect of the heat exchange assembly, this application provides a battery device, which includes a housing assembly, a battery cell assembly, and a heat exchange assembly. The housing assembly has a receiving cavity inside. The battery cell assembly is disposed within the receiving cavity. The heat exchange assembly is disposed within the receiving cavity. The heat exchange assembly includes at least two flexible members, which are stacked and a heat exchange channel is formed between them. The heat exchange channel is used to conduct a heat exchange medium, which exchanges heat with the battery cell assembly.

[0126] The battery device provided in this application includes a housing assembly, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is disposed within the housing cavity of the housing assembly, which protects the battery cell assembly. By also disposing of the heat exchange assembly within the housing cavity, i.e., placing 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 includes a flexible component, which is lightweight, thus reducing the weight of the battery device, lowering the production cost of the heat exchange assembly, and improving the energy density of the battery device. Furthermore, the flexible component is a flexible structure with a certain deformation capability, which allows the heat exchange assembly to better fit and adapt to the housing assembly and / or the battery cell assembly. This helps to absorb assembly tolerances of the heat exchange assembly, improve the fit between the heat exchange assembly and the housing assembly and / or the battery cell assembly, increase 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 devices that use battery devices. The electrical devices include the battery devices of any embodiment of this application, and the battery devices are used to provide electrical energy.

[0128] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical equipment.

[0129] It should be noted that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical equipment described above, but can also be applied to all battery devices including housing components and electrical equipment using battery devices. However, for the sake of brevity, the following embodiments are all described using electric vehicles as examples.

[0130] Please refer to Figure 1 The vehicle 1000 may contain a controller 200, a motor 300, and a battery device 100. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 may be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, it can serve as the operating power source for the vehicle 1000's electrical system, such as for the power requirements of starting, navigation, and operation. In another embodiment of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000 but also as the driving power source, replacing or partially replacing fuel or natural gas to provide driving power to the vehicle 1000.

[0131] Please see Figure 2To meet different power demands, the battery device 100 includes a battery cell assembly 10, which may include multiple battery cells 11. A battery cell 11 is the smallest unit that makes up a module or package of the battery device 100. Multiple battery cells 11 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 11 are connected in both series and parallel connections. Multiple battery cells 11 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 11 is housed within a housing assembly 20. Alternatively, the battery device 100 can also be composed of multiple battery cells 11 first connected in series, parallel, or in a mixed configuration to form a battery device 100 module, and then these modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing assembly 20. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 11. Each battery cell 11 can be a secondary battery device 100 or a primary battery device 100; it can 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 to these. The battery cell 11 can be cylindrical, flat, cuboid, or other shapes.

[0132] Please see Figures 2 to 4 This application provides a battery device 100, which includes a housing assembly 20, a battery cell assembly 10, and a heat exchange assembly 30. The housing assembly 20 has a receiving cavity 23 inside. The battery cell assembly 10 is disposed within the receiving cavity 23. The heat exchange assembly 30 is disposed within the receiving cavity 23. The heat exchange assembly 30 includes at least two flexible members. (See reference...) Figure 11 At least two flexible elements are stacked, and a heat exchange channel 3221 is formed between the flexible elements. The heat exchange channel 3221 is used to conduct heat exchange medium, which is used to exchange heat with the battery cell assembly 10.

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

[0134] The enclosure component 20 can be a simple three-dimensional structure such as a cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres. The material of the enclosure component 20 can be 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 housing assembly 20 is used to encapsulate the battery cell assembly 10. The housing assembly 20 can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cell assembly 10.

[0136] For example, the enclosure assembly 20 is typically a cuboid structure, with both its length and width directions parallel to the horizontal plane. The length direction of the enclosure assembly 20 is parallel to the longest side of its cuboid structure. The height direction of the enclosure assembly 20 is perpendicular to the ground. For example, as... Figure 2 and Figure 3 As shown, the length direction of the housing assembly 20 is represented by X, the width direction of the housing assembly 20 is represented by Y, and the height direction of the housing assembly 20 is represented by Z.

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

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

[0139] Here, the heat exchange component 30 is set inside the housing cavity 23 of the housing component 20, which means it can directly contact the battery cell component 10, which is beneficial to improving heat exchange efficiency and heat exchange effect.

[0140] The heat exchange assembly 30 includes at least two flexible elements, meaning that the number of flexible elements included in the heat exchange assembly 30 can be two or more.

[0141] Here, the flexibility in flexible component 31 refers to the material properties of the structure. This type of property can be due to the material's light weight, or it can be due to at least one of the material's properties such as thickness, stiffness, strength, and elastic modulus. As an example, the material of flexible component 31 can be selected as a material that is lighter than conventional aluminum plates, steel plates, etc., and its flexibility can be controlled by the thickness, width, length, and type of material of flexible component 31. By setting the heat exchange assembly 30 in the form of flexible component 31 in this embodiment, it is beneficial to reduce the weight of heat exchange assembly 30.

[0142] At least two flexible elements include a heat-sealing area, which is constructed by hot pressing the at least two flexible elements together. The heat-sealing area separates the heat exchange assembly 30 into a heat exchange channel 3221 and a non-heat-sealing area. This means that the flexible elements are hot-pressed to form the heat exchange channel 3221 and the non-heat-sealing area. In other words, the heat-sealing area separates the heat exchange channel 3221 and the non-heat-sealing area.

[0143] The heat exchange medium flows through the heat exchange channel 3221 to exchange heat 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 achieve a cooling effect on the battery cell 11, such as being gaseous or liquid. In this embodiment, a coolant is used as an example for description.

[0145] For example, the heat exchange assembly 30 also includes a liquid inlet and a liquid outlet, which are used to connect to the air conditioning system or liquid storage device such as 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. There can be one or more.

[0147] The "multiple" mentioned in the embodiments of this application refers to two or more.

[0148] The principle of heat exchange component 30 for heat exchange of battery cell assembly 10 is as follows: the heat exchange medium output from the heat exchange medium source (not shown in the figure) enters the medium flow through the inlet 3222 of the heat exchange component 30. 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, thus completing the heat exchange of the battery cell assembly 10.

[0149] Here, the heat exchange component 30 can exchange heat with the battery cell assembly 10 by either dissipating heat from the battery cell assembly 10 or by heating the battery cell assembly 10.

[0150] The principle of heat exchange component 30 for heat dissipation of battery cell assembly 10 is as follows: the heat exchange medium output from 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 battery cell assembly 10, the heat exchange medium flows out through the outlet 3223 of the heat exchange component 30, releasing the heat and completing the cooling and heat dissipation of 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 from 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, thus completing the heating of the battery cell assembly 10.

[0152] The flexible component is configured as a flexible structure, which has certain expandable or contractible characteristics. It can also be understood as a flexible structure that can elastically deform. This flexible component has the ability to deform and recover its 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, thereby improving the fit between the heat exchange component 30 and the housing assembly 20 and / or the battery cell assembly 10, thereby increasing the effective heat exchange area between the heat exchange component 30 and the housing assembly 20 and / or the battery cell assembly 10, and thus improving the heat exchange efficiency.

[0153] It should be noted that the flexible component can be conductive, which is beneficial for maintaining an equipotential setting with the housing assembly 20; the flexible component can also be electrically insulating, eliminating the need for insulation treatment, which helps reduce 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 this application includes a housing assembly 20, a battery cell assembly 10, and a heat exchange assembly 30. The battery cell assembly 10 is disposed within the receiving cavity 23 of the housing assembly 20, and the housing assembly 20 protects the battery cell assembly 10. By also disposing of the heat exchange assembly 30 within the receiving cavity 23, i.e., by placing the heat exchange assembly 30 and the battery cell assembly 10 in the same space, the heat exchange efficiency between the heat exchange assembly 30 and the battery cell assembly 10 is improved. Furthermore, the heat exchange assembly 30 includes a flexible component, which is lightweight, thus reducing the weight of the battery device 100. 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 component is a flexible structure with a certain deformation capability, which allows the heat exchange component 30 to fit and adapt better with the housing component 20 and / or the battery cell component 10. This helps to absorb the assembly tolerance of the heat exchange component 30, improve the fit between the heat exchange component 30 and the housing component 20 and / or the battery cell component 10, increase the effective heat exchange area between the heat exchange component 30 and the housing component 20 and / or the battery cell component 10, and thus improve the heat exchange efficiency and heat exchange effect of the heat exchange component 30.

[0155] The housing assembly 20 is used to house the battery cell assembly 10, and the housing assembly 20 can have various structures. See some embodiments. 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 overlap each other, and together define a receiving 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, and the first housing portion 211 may be a plate-like structure. The first housing portion 211 overlaps the open side of the second housing portion 212 to form a housing body 21 with the receiving cavity 23. Alternatively, both the first housing portion 211 and the second housing portion 212 may be hollow structures with one side open, and the open side of the first housing portion 211 overlaps the open side of the second housing portion 212 to form a housing body 21 with the receiving cavity 23. Of course, the first housing portion 211 and the second housing portion 212 may be of various shapes, such as cylinders, cuboids, etc.

[0156] To improve the sealing performance after the first housing part 211 and the second housing part 212 are connected, a sealing element, such as sealant or sealing ring, can also be provided between the first housing part 211 and the second housing part 212.

[0157] Assuming that the first box part 211 covers the top of the second box part 212, the first box part 211 can also be called the upper box cover, and the second box part 212 can also be called the lower box cover.

[0158] For example, the enclosure assembly 20 includes a bottom protective plate, which may be disposed at the bottom of the enclosure body 21. By providing the bottom protective plate, the enclosure assembly 20 and the battery cell 11 can be protected.

[0159] In some embodiments, please refer to Figure 2 The battery cell assembly 10 includes multiple battery cells 11, and the heat exchange assembly 30 is located between the battery cells 11.

[0160] Here, the heat exchange component 30 includes a flexible component. The flexible component has relatively weak structural strength. Therefore, if the heat exchange component 30 is placed at the bottom of the battery cell assembly 10, the heat exchange component 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 suspended, resulting in low overall stiffness of the battery device 100.

[0161] In this embodiment, by placing the heat exchange component 30 between the battery cells 11, that is, by not placing the heat exchange component 30 at the bottom of the battery cells 11, the overall rigidity of the battery device 100 is improved, thereby enhancing the reliability of the battery device 100. Furthermore, placing the heat exchange component 30 between the battery cells 11 increases the contact area between the heat exchange component 30 and the battery cells 11, thereby improving heat exchange efficiency and effect.

[0162] In some embodiments, please refer to Figure 2 and Figure 5 The battery cell assembly 10 includes multiple battery cells 11, and each battery cell 11 has multiple sides, including a first side 111, which is the side with the smallest area among the multiple sides. The heat exchange assembly 30 is located on one side of the first side 111 of the battery cell 11.

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

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

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

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

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

[0168] In some embodiments, please refer to Figures 2 to 5 The battery cell assembly 10 includes at least one battery pack 12, the battery pack 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 pack 12 along a second direction, the first direction intersecting 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; for example, the first direction and the second direction are perpendicular to each other.

[0170] The battery cell assembly 10 may include one battery pack 12 or multiple battery packs 12. In embodiments where the battery cell assembly 10 includes multiple battery packs 12, the battery packs 12 are arranged along a second direction.

[0171] The battery pack 12 may have a heat exchange component 30 provided on one side along the second direction, or it may have a heat exchange component 30 provided on both sides along the second direction.

[0172] In this embodiment, by placing the heat exchange component 30 on at least one side of the battery pack 12 along the second direction—that is, not at the bottom of the individual battery cells 11—the overall rigidity of the battery device 100 is improved, thereby enhancing its reliability. Furthermore, placing the heat exchange component 30 on at least one side of the battery pack 12 along the second direction increases the contact area between the heat exchange component 30 and the individual battery cells 10, thereby improving heat exchange efficiency and effect.

[0173] In some embodiments, please refer to Figures 2 to 5 ,as well as Figures 9 to 11 The battery cell assembly 10 includes multiple battery packs 12, which are arranged along a second direction. The battery cell 11 includes multiple sides, including a first side 111, which is the side with the smallest area among the multiple sides, and the first direction is parallel to the first side 111.

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

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

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

[0177] In some embodiments, please refer to Figures 2 to 11 The heat exchange assembly 30 includes at least one heat exchange unit 32, which includes a first collector 321 and a plurality of heat exchange elements 322 arranged along a first direction. Each heat exchange element 322 has a heat exchange channel 3221. All of the plurality of heat exchange elements 322 are in communication with the first collector 321.

[0178] Here, "heat exchange assembly 30 includes 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. It can be determined according to the 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 the first direction. In other words, 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.

[0180] Furthermore, since the heat exchanger 322 includes a flexible element, the heat exchange unit 32, by providing multiple heat exchangers 322 arranged along the first direction, can reduce the size of the heat exchanger 322 in the first direction, reduce the manufacturing difficulty of the heat exchanger 322, and improve the rigidity of a single heat exchanger 322 in the first direction.

[0181] Multiple heat exchange elements 322 are connected to the first collector 321, which means that each heat exchange element 322 collects the current through the same first collector 321, which helps to simplify the structure of the heat exchange assembly 30.

[0182] It should be noted that an expansion beam 22 is also provided inside the housing assembly 20. The expansion beam 22 extends along the second direction and is used to support the battery pack 12. Therefore, by providing multiple heat exchange elements 322 arranged along the first direction, the heat exchange unit 32 can also avoid the expansion beam 22.

[0183] In this embodiment, by configuring the heat exchange unit 32 to include multiple heat exchange elements 322 arranged along a first direction, 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 and thus improve the heat exchange efficiency. At the same time, by connecting multiple heat exchange elements 322 to the first current collector 321, that is, by collecting current through the same first current collector 321, the structure of the heat exchange assembly 30 is simplified, the cost is reduced, and the energy density of the battery device 100 is increased.

[0184] In some embodiments, please refer to Figures 2 to 11 The heat exchange assembly 30 includes a second collector and a plurality of heat exchange units 32 arranged along a second direction, wherein the first collectors 321 of the plurality of heat exchange units 32 are all in communication with the second collector.

[0185] For example, the second manifold is provided with an inlet and an outlet, which are used for connecting to the pipelines of the 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 units 32 and the arrangement direction of the battery pack 12 are both the second direction, which is beneficial 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, by configuring the heat exchange assembly 30 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, it is beneficial to increase 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 current collector 321 of the multiple heat exchange units 32 to the second current collector, that is, by collecting current through the same second current collector, it is beneficial to further simplify the structure of the heat exchange assembly 30, reduce costs, and increase the energy density of the battery device 100.

[0189] In some embodiments, please refer to Figures 6 to 11 The heat exchanger 322 has an inlet 3222 and an outlet 3223, both of which are connected to 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 exchanger 322 has an inlet 3222 and an outlet 3223, and the heat exchanger 322 is connected to the first 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 to say, 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 facing 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 the outlet 3223 of the heat exchange element 322 of the same heat exchange unit 32 is arranged facing the same side of the heat exchange unit 32 along the second direction.

[0193] In this embodiment, by placing 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 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, by placing the inlet 3222 and outlet 3223 of the same heat exchange unit 32 on opposite sides of the heat exchange unit 32 along the second direction, it is beneficial to connect multiple heat exchange components 322 to the same first current collector 321, which facilitates assembly and simplifies the structure of the heat exchange assembly 30.

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

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

[0196] The first conveying component 3224 is, for example, a pipe fitting, the interior of which has a conveying channel.

[0197] The second conveying component 3225 is, for example, a pipe fitting, the interior of which has a conveying channel.

[0198] Here, the first conveyor 3224 and the second conveyor 3225 can be an integrated structure. An integrated first conveyor 3224 and the second conveyor 3225 can reduce the number of parts, reduce assembly time, and improve assembly efficiency.

[0199] Of course, the first conveyor 3224 and the second conveyor 3225 can also be separate structures. Separate first conveyor 3224 and second conveyor 3225 are advantageous for forming the required structure.

[0200] In this embodiment, since the inlet 3222 and outlet 3223 of the same heat exchange unit 32 are located 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 facilitates assembly and simplifies the structure of the heat exchange assembly 30.

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

[0202] For example, the inlet 3222 and the outlet 3223 are located on the top of the heat exchanger 322, and thus the first collector 321 is also located on the top of the heat exchanger 322, which helps to shorten the connection path between the first collector 321 and the heat exchanger 322.

[0203] The first current collector 321 is sandwiched between two adjacent battery packs 12, thus supporting the two adjacent battery packs 12 to form a receiving space. The heat exchanger 322 is disposed in the receiving space formed between the two adjacent battery packs 12. For example, when the battery cell assembly 10 is assembled, the first current collector 321 can provide a supporting function.

[0204] In this embodiment, by sandwiching the first current collector 321 between two adjacent battery packs 12, the first current collector 321 is supported between the two adjacent battery packs 12 to form a receiving space. The heat exchanger 322 is disposed in the receiving space formed between the two adjacent battery packs 12. In this way, the blockage of the heat exchange channel 3221 of the heat exchanger 322 caused by the two adjacent battery packs 12 squeezing the heat exchanger 322 can be improved to a certain extent, thereby improving the reliability of the heat exchange assembly 30.

[0205] In some embodiments, please refer to Figures 4 to 8 Each heat exchange unit 32 includes two heat exchange elements 322, with the inlet 3222 and outlet 3223 of the two heat exchange elements 322 respectively located at the ends of the two heat exchange elements 322 that are close to each other.

[0206] Here, each heat exchange unit 32 includes two heat exchange elements 322, which are symmetrically arranged about the centerline of the battery cell assembly 10 in a first direction.

[0207] The end of the two heat exchangers 322 that is close to each other is the end of the heat exchanger 322 that is close to the centerline of the battery cell assembly 10 along the first direction.

[0208] In this embodiment, by setting the inlet 3222 and outlet 3223 of the two heat exchangers 322 at the ends of the two heat exchangers 322 that are close to each other, it is further beneficial to connect multiple heat exchangers 322 to the same first collector 321, which facilitates assembly and further simplifies the structure of the heat exchange assembly 30.

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

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

[0211] It should be noted that the dimension of the first current collector 321 in the second direction refers to the dimension of the area of ​​the first current collector 321 located between two adjacent battery packs 12 in the second direction. For example, the dimension of the first current collector 321 in the second direction is the distance between the opposite sides of the first conveyor 3224 and the second conveyor 3225.

[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 exchanger 322 in the second direction, a sufficiently large accommodating space can be formed between two adjacent battery packs 12. This further helps to improve the situation where the heat exchanger 322 is squeezed by two adjacent battery packs 12, which leads to the blockage of the heat exchanger channel 3221 of the heat exchanger 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 exchanger 322.

[0214] Here, the greater the hardness of the first current collector 321, the more difficult it is to be squeezed, deformed, or damaged.

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

[0216] In some embodiments, please refer to 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 supporting the two adjacent battery packs 12 to form a receiving space, and the heat exchanger 322 is disposed in the receiving space formed between the two adjacent battery packs 12. For example, when the battery cell modules 10 are assembled into a group, the support assembly 323 can provide support.

[0218] In some embodiments, the first current collector 321 may also be sandwiched between two adjacent battery packs 12, that is, the first current collector 321 and the support component 323 jointly support the two adjacent battery packs 12, further improving the situation where the two adjacent battery packs 12 squeeze the heat exchanger 322; of course, the first current collector 321 may also be sandwiched between two adjacent battery packs 12, but does not play a supporting role. For example, the dimension of the support component 323 in the second direction is greater than or equal to the dimension of the first current collector 321 in the second direction, which is beneficial to make full use of the gap between the battery packs 12, thereby improving the energy density.

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

[0220] In this embodiment, by sandwiching the support component 323 between two adjacent battery packs 12, the support component 323 is supported between the two adjacent battery packs 12 to form a receiving space. The heat exchange component 322 is disposed in the receiving space formed between the two adjacent battery packs 12. In this way, the blockage of the heat exchange channel 3221 of the heat exchange component 322 caused by the two adjacent battery packs 12 squeezing the heat exchange component 322 can be improved to a certain extent, thereby improving the reliability of the heat exchange component 30.

[0221] It should be noted that the specific structure of the support component 323 is not limited here. For example, at least a portion of the support component 323 is disposed at the edge of the heat exchanger 322, which helps to protect the heat exchanger 322 and improve the situation where the heat exchanger 322 is squeezed.

[0222] In some embodiments, please refer to Figures 5 to 11 The support assembly 323 includes a first support member 3231 extending along a first direction, and the first support member 3231 is disposed at at least one end of the heat exchange member 322 along the 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 in the same direction as the arrangement of the battery cells 11 in the battery pack 12.

[0224] The first support member 3231 being disposed at at least one end of the heat exchanger 322 along the height direction means that the first support member 3231 can be disposed at the top of the heat exchanger 322 or at the bottom of the heat exchanger 322, in which case it also has the function of blocking adhesive. Alternatively, the first support member 3231 can be disposed at both the top and bottom of the heat exchanger 322.

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

[0226] Here, the first support member 3231 can be bonded or heat-fused to the heat exchange member 322.

[0227] In this embodiment, by including a first support member 3231 extending along a first direction in the support component 323, that is, the first support member 3231 extends in the same direction as the heat exchange member 322 and in the same direction as the arrangement of the battery cells 11 in the battery pack 12, it is beneficial to support the length direction of the heat exchange member 322 and to limit the position of the battery cells 11 in the battery pack 12.

[0228] In some embodiments, please refer to 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, the second support member 3232 being 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 it may be located at both ends of the first support member 3231 along the first direction.

[0230] Here, since the inlet 3222 and 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 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, by providing a second support member 3232 extending along the height direction of the battery device 100, 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 exchanger 322 are located, and also beneficial for limiting the battery cell 11 located in the area where the inlet 3222 and outlet 3223 of the heat exchanger 322 are located.

[0232] The specific number of the second support member 3232 is not limited here.

[0233] For example, 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 near the adjacent heat exchanger 322. That is, the two second support members 3232 are located at the ends of the inlet 3222 and the outlet 3223 respectively away from the first support member 3231.

[0234] In some embodiments, please refer to Figures 6 to 7 The heat exchanger 322 has a relief groove 3226, and at least a portion of the second support 3232 is disposed in the relief groove 3226.

[0235] For example, the heat exchanger 322 has a clearance groove 3226 between the inlet 3222 and the outlet 3223, and a second support 3232 is disposed in the clearance groove 3226.

[0236] In some embodiments, please refer to Figures 5 to 8 The support component 323 corresponds one-to-one with the heat exchanger 322.

[0237] The support components 323 and the heat exchanger 322 are in one-to-one correspondence, that is, the number of support components 323 and the number of heat exchanger 322 are the same.

[0238] In this embodiment, by setting the support component 323 and the heat exchange component 322 to correspond one-to-one, it is beneficial to provide targeted support and protection for the heat exchange component 322, and to specifically limit the battery cell 11 corresponding to the heat exchange component 322. This can further improve the situation where the heat exchange channel 3221 of the heat exchange component 322 is blocked due to the compression of the heat exchange component 322 by two adjacent battery packs 12, thereby improving the reliability of the heat exchange component 30.

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

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

[0241] It should be noted that the dimension of the support component 323 in the second direction refers to the dimension of the area of ​​the support component 323 located between two adjacent battery packs 12 in the second direction.

[0242] In this embodiment, by setting the dimension of the support component 323 in the second direction to be greater than or equal to the dimension of the heat exchanger 322 in the second direction, a sufficiently large accommodating space can be formed between two adjacent battery packs 12. This further helps to improve the situation where the heat exchanger 322 is squeezed by two adjacent battery packs 12, which leads to the blockage of the heat exchanger channel 3221 of the heat exchanger 322, thereby further improving the reliability of the heat exchange component 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, the point value can be any one of 0.05mm, 0.1mm, 0.2mm, 0.5mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, or 10mm, or any point value between two of them.

[0245] The dimensions of the support assembly 323 in the second direction are generally exactly the same or approximately the same as those of the adjacent battery pack 12 in the second direction.

[0246] In this embodiment, by setting the dimension of the support component 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 length direction, and the battery cells 11 of the battery pack 12 can be limited while also taking into account the energy density of the battery device 100.

[0247] In some embodiments, the hardness of the support component 323 is greater than the hardness of the heat exchanger 322.

[0248] Here, the greater the rigidity of the support component 323, the less likely it is to be deformed or damaged by compression.

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

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

[0251] For example, the flexible component has a layered structure, including a metal layer and a non-metal layer, which are stacked sequentially.

[0252] For example, the battery device 100 includes a plate that is disposed on 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 conductivity between the support component 323 and the heat exchanger 322, and also to improve the corrosion resistance of the support component 323.

[0254] For example, the support component 323 is a plastic part.

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

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

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

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

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

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

[0261] In this embodiment, because the metal plasticized film is thin and lightweight, and because a heat exchange channel 3221 is formed between at least two metal plasticized films, it is not affected by the extrusion process and does not need to meet a large thickness requirement. Therefore, the overall thickness and weight of the heat exchange assembly 30 can be reduced. Simultaneously, because the metal plasticized film has insulating properties, the risk of insulation failure can be reduced. This reduces the risk of the heat exchange assembly 30 reacting with the internally flowing heat exchange medium, further reducing the risk of heat exchange medium corrosion and leakage.

[0262] For example, at least two flexible elements are configured as aluminum-plastic film.

[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 has a layered structure, comprising a metal layer and a non-metal layer, which are stacked sequentially.

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

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

[0267] Here, there is no limit to the number of metal layers and non-metal layers.

[0268] In this embodiment, the flexible component, composed of sequentially stacked metal and non-metal layers, is thin and lightweight. Furthermore, by forming a heat exchange channel 3221 between at least two flexible components, it is unaffected by the extrusion process and does not need to meet large thickness requirements, thus reducing the overall thickness and weight of the heat exchange assembly 30. In addition, the heat exchange assembly 30 does not react with the internally flowing heat exchange medium, therefore there is no risk of corrosion or leakage.

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

[0270] By using one or more of aluminum foil, copper foil, and steel foil as the metal layer, 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 or more of polypropylene, polyvinyl chloride, and polyethylene.

[0272] By using one or more of polypropylene, polyvinyl chloride, and polyethylene as the non-metallic layer, flexible components can be made waterproof.

[0273] For example, a non-metallic layer of corrosion-resistant material with acid and alkali corrosion resistance can also be selected, or additives can be added to the non-metallic layer to make the non-metallic layer resistant to acid and alkali corrosion.

[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, a hot-melt material, it is advantageous to combine the non-metallic layer and the metallic layer together through hot melting, which is simple to form and has high production efficiency.

[0276] In some embodiments, the flexible element has a layered structure, including a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged sequentially, with the waterproof layer being closer to the heat exchange channel 3221 than the corrosion-resistant layer.

[0277] Here, the corrosion-resistant layer can be a nylon layer made of nylon material, thus having certain corrosion resistance, such as resistance to acid and alkali corrosion.

[0278] The isolation layer can be a metal layer, which can be one or more of aluminum foil, copper foil, and steel foil. This allows the flexible component to have a certain structural strength and to play an isolation role.

[0279] The waterproof layer can be a non-metallic layer, which can be one or more of polypropylene, polyvinyl chloride and polyethylene, enabling the flexible component to have a certain degree of waterproofing.

[0280] In this embodiment, by setting the flexible component 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 component 30.

[0281] In some embodiments, the thickness of the isolation layer is 6.5 μm-100 μm.

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

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

[0284] In some embodiments, the thickness of the isolation layer is 6.5 μm-15 μm.

[0285] The thickness of the isolation layer can be any one of the following values, or any value between two of the following: 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, and 15μm.

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

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

[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. Point values ​​of any one of the following: 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, and 20μm, or point values ​​between any two.

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

[0290] In some embodiments, the thickness of the waterproof layer is 50μm-120μm.

[0291] The thickness of the waterproof layer can be any one of the following values ​​or any combination of two: 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 92μm, 95μm, 100μm, 105μm, 108μm, 110μm, 115μm, and 120μm.

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

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

[0294] For example, the point value can be 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, or 0.3mm, or a point value between any two of them.

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

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

[0297] For example, the point value can be 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, or 0.2mm, or a point value between any two of them.

[0298] In this embodiment, by setting the thickness of the flexible component to 0.08mm-0.2mm, the heat exchange component 30 made of the flexible component has a certain structural strength, while further reducing the overall thickness of the heat exchange component 30. This is beneficial to further reduce the overall volume and weight of the battery device 100, thereby further increasing the energy density of the battery device 100.

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

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

[0301] The elastic modulus describes the magnitude of a unit strain caused by a unit stress when a solid is subjected to force within a certain range; it is one of the fundamental physical quantities of materials. The larger the elastic modulus, the greater the stiffness and compressive strength of the material. 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 component to 0.1MPa-10000MPa, the flexible component has a certain structural strength, which improves the reliability of the heat exchange component 30 and also has a certain deformation capability. This can improve the fit between the heat exchange component 30 and the housing 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 housing component 20 and / or the battery pack 12 battery cell components 10, thus improving the heat exchange efficiency and heat exchange effect of the heat exchange component 30.

[0303] In one specific embodiment, the flexible component 31 has a layered structure, comprising a corrosion-resistant layer, an isolation layer, and a waterproof layer sequentially arranged, with the waterproof layer positioned closer to the heat exchange channel 3221 than the corrosion-resistant layer. The thickness of the isolation layer is 6.5 μm-15 μm. The thickness of the corrosion-resistant layer is 5 μm-20 μm. The thickness of the waterproof layer is 50 μm-120 μm. The thickness of the flexible component 31 is 0.05 mm-0.3 mm. The elastic modulus of the flexible component 31 is 0.1 MPa-10000 MPa.

[0304] It should be noted that the dimensions of the support components in the second direction can be measured with vernier calipers before assembly; the thicknesses of the corrosion-resistant layer, the isolation layer, and the waterproof layer can be measured with vernier calipers; the thickness of the flexible component 31 can be measured with vernier calipers before assembly. It should be noted that all of the above measurements can be performed at normal temperature and pressure.

[0305] The elastic modulus of the flexible component 31 can be measured by at least one of the following methods: static tensile testing, dynamic testing, sound velocity method, nanoindentation method, and bending method. The measuring instrument can include a nanoindenter and a universal testing machine.

[0306] For example, the elastic modulus of the flexible part 31 can be measured by nanoindentation under normal temperature and pressure. Nanoindentation uses a tiny indenter to indent the surface of the flexible part 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 references to terms such as "in one embodiment," "in some embodiments," "in other embodiments," "in yet another embodiment," or "exemplary," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions 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. Furthermore, without contradiction, those skilled in the art can combine the different embodiments or examples described in this application, as well as the features of the different embodiments or examples.

[0308] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A battery device, characterized by, The application relates to a battery pack, comprising: a box assembly internally provided with a containing cavity; a battery cell assembly arranged in the containing cavity; a heat exchange assembly arranged in the containing cavity, wherein the heat exchange assembly comprises at least two flexible members arranged in layers, and a heat exchange flow channel is formed between the flexible members, the heat exchange flow channel being used for guiding a heat exchange medium to exchange heat with the battery cell assembly.

2. The battery device according to claim 1, characterized by The battery cell assembly comprises a plurality of battery cells, and the heat exchange assembly is arranged between the battery cells.

3. The battery device of claim 1, wherein The battery cell assembly comprises a plurality of battery cells, and the battery cells comprise a plurality of sides, wherein the battery cells comprise a first side which is the side with the smallest area among the plurality of sides, and the heat exchange assembly is arranged on one side of the first side of the battery cell.

4. The battery device of claim 1, wherein The battery cell assembly comprises at least one battery group, the battery group comprises a plurality of battery cells arranged in a first direction, and the battery group is provided with the heat exchange assembly on at least one side in a second direction, wherein the first direction intersects the second direction.

5. The battery device of claim 4, wherein, The battery cell assembly comprises a plurality of battery groups arranged in the second direction, and the battery cells comprise a plurality of sides, wherein the battery cells comprise a first side which is the side with the smallest area among the plurality of sides, and the first direction is parallel to the first side.

6. The battery device of claim 4, wherein The heat exchange assembly comprises at least one heat exchange unit, the heat exchange unit comprises a first collector and a plurality of heat exchange members arranged in the first direction, the heat exchange members are provided with the heat exchange flow channel, and the plurality of heat exchange members are in communication with the first collector.

7. The battery device of claim 6, wherein The heat exchange assembly comprises a second collector and a plurality of heat exchange units arranged in a second direction, and the first collectors of the plurality of heat exchange units are in communication with the second collector.

8. The battery device of claim 6, wherein, The heat exchange members are provided with an inlet and an outlet, the inlet and the outlet are in communication with the heat exchange flow channel, the inlet of the same heat exchange unit is located on the same side of the heat exchange unit in the second direction, and the outlet of the same heat exchange unit is located on the same side of the heat exchange unit in the second direction.

9. The battery device of claim 8, wherein, The first collector comprises 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 in the second direction, the first conveying member is in communication with the inlet of the heat exchange unit, and the second conveying member is in communication with the outlet of the heat exchange unit.

10. The battery device of claim 6, wherein, The battery cell assembly comprises a plurality of battery groups arranged in the second direction, and the first collector is clamped between adjacent two battery groups.

11. The battery device of claim 10, wherein, The size of the first collector in the second direction is greater than or equal to the size of the heat exchange member in the second direction.

12. The battery device of claim 10, wherein, The hardness of the first collector is greater than the hardness of the heat exchange member.

13. The battery device of claim 8, wherein, Each heat exchange unit comprises two heat exchange members, and the inlet and the outlet of the two heat exchange members are arranged on one end of the two heat exchange members close to each other.

14. The battery device of claim 6, wherein, The heat exchange unit comprises a supporting assembly clamped between adjacent two battery groups.

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

16. The battery device of claim 15, wherein, The support assembly further comprises a second support extending along the height direction of the battery device, and the second support is arranged at one end of the first support in the first direction.

17. The battery device of claim 16, wherein, The heat exchange member is provided with a recess, and at least part of the second support is arranged in the recess.

18. The battery device of claim 14, wherein, The support assembly corresponds to the heat exchange member one by one.

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

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

21. The battery device of claim 14, wherein, The hardness of the support assembly is greater than the hardness of the heat exchange member.

22. The battery device of claim 14, wherein, The support assembly is an insulating member.

23. The battery device of claim 22, wherein, The support assembly is a plastic member.

24. The battery device of claim 14, wherein, The support assembly is an insulating adhesive layer.

25. The battery device of claim 1, wherein, The at least two flexible members are metal plasticized films.

26. The battery device of claim 25, wherein, The at least two flexible members are aluminum plastic films.

27. The battery device of any one of claims 1-26, wherein, The flexible member is a layered structure, and the flexible member comprises a metal layer and a non-metal layer, and the metal layer and the non-metal layer are arranged in sequence.

28. The battery device of claim 27, wherein, The metal layer comprises one or more of an aluminum foil, a copper foil, and a steel foil.

29. The battery device of claim 27, wherein, The non-metal layer comprises one or more of polypropylene, polyvinyl chloride, and polyethylene.

30. The battery device of claim 27, wherein, The non-metal layer is a hot melt layer.

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

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

33. The battery device of claim 32, wherein, The thickness of the isolation layer is 6.5 μm-15 μm.

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

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

36. The battery device of any one of claims 1-26, wherein, The thickness of the flexible member is 0.05 mm-0.3 mm.

37. The battery device of claim 36, wherein, The thickness of the flexible member is 0.08 mm-0.2 mm.

38. The battery device of any one of claims 1-26, wherein, The elastic modulus of the flexible member is 0.1 MPa-10000 MPa.

39. A heat exchange assembly, comprising: The heat exchange assembly is the heat exchange assembly of the battery device according to any one of claims 1-38, and the heat exchange assembly is used for heat exchange with the battery cell assembly.

40. An electrical device, comprising: The battery device according to any one of claims 1-38 or the heat exchange assembly according to claim 39.

41. An energy storage device, comprising: The battery device according to any one of claims 1-38 or the heat exchange assembly according to claim 39.

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