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

Abstract

Provided in the embodiments of the present disclosure are a heat exchange assembly, a battery device, an electric apparatus and an energy storage apparatus. The battery device comprises a case assembly, a battery cell assembly and a heat exchange assembly. The case assembly has an accommodating cavity therein. The battery cell assembly is arranged in the accommodating cavity. The heat exchange assembly is arranged in the accommodating cavity. The heat exchange assembly comprises at least two flexible members, which are arranged in a stacked manner; and a heat exchange flow channel is formed between the flexible members and configured for conduction of a heat exchange medium, which is configured for heat exchange with the battery cell assembly.

Description

Heat exchange components, battery devices, electrical equipment, and energy storage devices

[0001] Cross-reference to related applications

[0002] This disclosure is based on and claims priority to Chinese Patent Application No. 202411179433.8, filed on August 26, 2024, entitled "Heat Exchange Component, Battery Device, Electrical Equipment and Energy Storage Device", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of battery device technology, and in particular to a heat exchange component, battery device, electrical equipment, and energy storage device. Background Technology

[0004] This section is intended to provide background or context for embodiments of this disclosure. The description herein is not intended to imply that it is prior art simply because it is included in this section.

[0005] In battery-powered new energy vehicles, the battery can provide all or part of the power. During battery use, the individual battery cells generate heat. If this heat is too high, it will adversely affect the battery's performance and lifespan. Therefore, how to effectively dissipate heat from the battery cells has become an important research direction in this field. Summary of the Invention

[0006] In view of this, the present disclosure aims to provide a heat exchange component, a battery device, an electrical device, and an energy storage device to solve the technical problem of how to improve the heat exchange effect.

[0007] Therefore, a first aspect of the present disclosure provides a battery device, comprising:

[0008] The housing assembly has an internal cavity;

[0009] The battery cell assembly is housed within the receiving cavity;

[0010] A heat exchange assembly is disposed within a receiving cavity. The heat exchange assembly includes at least two flexible elements, which are stacked and a heat exchange channel is formed between the flexible elements. The heat exchange channel is used to conduct heat exchange medium, which is used to exchange heat with the battery cell assembly.

[0011] The battery 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, the heat exchange efficiency between the heat exchange assembly and the battery cell assembly is improved. 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 improving 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 facilitates the absorption of assembly tolerances in 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, increasing the effective heat exchange area between the heat exchange assembly and the housing assembly and / or the battery cell assembly, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly.

[0012] In some embodiments, the battery cell assembly includes multiple battery cells, and the heat exchange assembly is located between the battery cells.

[0013] This helps improve the overall rigidity of the battery pack, thereby enhancing its reliability. Furthermore, placing heat exchange components between the individual battery cells increases the contact area between them, thus improving heat exchange efficiency and effectiveness.

[0014] In some embodiments, the battery cell assembly includes multiple battery cells, each battery cell includes multiple sides, the multiple sides include a first side, the first side being the side with the smallest area among the multiple sides, wherein the heat exchange assembly is located on one side of the first side of the battery cell.

[0015] In this embodiment, by placing the heat exchange component on one side of the first side of the battery cell, the contact area between the heat exchange component and the battery cell 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 squeezes the heat exchange component due to expansion during the use of the battery device, thereby improving the reliability of the heat exchange component.

[0016] In some embodiments, the battery cell assembly includes at least one battery pack, the battery pack includes a plurality of battery cells arranged along a first direction, and a heat exchange component is disposed on at least one side of the battery pack along a second direction, the first direction intersecting the second direction.

[0017] In other words, the heat exchange components are not located at the bottom of the individual battery cells, which helps to improve the overall rigidity of the battery pack and thus improve its reliability. Furthermore, by positioning the heat exchange components on at least one side of the battery pack along the second direction, the contact area between the heat exchange components and the individual battery cells can be increased, thereby improving heat exchange efficiency and effectiveness.

[0018] In some embodiments, the battery cell assembly includes multiple battery packs arranged along a second direction; the battery cell includes multiple sides, including a first side, which is the side with the smallest area among the multiple sides, and the first direction is parallel to the first side.

[0019] In this embodiment, by placing the heat exchange component on one side of the first side of each battery cell in the battery pack, the contact area between the heat exchange component and the battery cell 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 expands and squeezes the heat exchange component during the use of the battery device, thereby improving the reliability of the heat exchange component.

[0020] In some embodiments, the heat exchange assembly includes at least one heat exchange unit, the heat exchange unit includes a first current collector and a plurality of heat exchange elements arranged along a first direction, the heat exchange elements having heat exchange channels, and the plurality of heat exchange elements being in communication with the first current collector.

[0021] In this embodiment, by configuring the heat exchange unit to include multiple heat exchange elements arranged along a first direction, the arrangement direction of the heat exchange elements in the heat exchange unit is the same as the arrangement direction of the battery cells in the battery pack, which helps to increase the contact area and thus improve the heat exchange efficiency. At the same time, by connecting multiple heat exchange elements to the first current collector, that is, by collecting current through the same first current collector, it helps to simplify the structure of the heat exchange assembly, reduce costs, and increase the energy density of the battery device.

[0022] In some embodiments, the heat exchange assembly includes a second current collector and a plurality of heat exchange units arranged along a second direction, wherein the first current collectors of the plurality of heat exchange units are all in communication with the second current collector.

[0023] In this embodiment, by configuring the heat exchange assembly to include multiple heat exchange units arranged along the second direction, so that the arrangement direction of the heat exchange units is the same as the arrangement direction of the battery pack, it is beneficial to increase the contact area between the heat exchange assembly and the battery cell assembly, thereby improving the heat exchange efficiency. At the same time, by connecting the first current collector of the multiple heat exchange units 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, reduce costs, and increase the energy density of the battery device.

[0024] 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.

[0025] 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.

[0026] In some embodiments, the first current collector includes a first conveying member and a second conveying member, which are disposed on opposite sides of the heat exchange unit along a second direction. The first conveying member is connected to the inlet of the heat exchange unit, and the second conveying member is connected to the outlet of the heat exchange unit.

[0027] 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.

[0028] In some embodiments, the battery cell assembly includes multiple battery packs arranged along a second direction, with a first current collector sandwiched between two adjacent battery packs.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] In some embodiments, the hardness of the first current collector is greater than the hardness of the heat exchanger.

[0033] 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.

[0034] 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 close to each other.

[0035] 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.

[0036] In some embodiments, the heat exchange unit includes a support assembly sandwiched between two adjacent battery packs.

[0037] 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.

[0038] In some embodiments, the support assembly includes a first support member extending along a first direction, the first support member being disposed at at least one end of the heat exchanger along the height direction.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] In some embodiments, the heat exchanger is provided with a clearance groove, and at least part of the second support is disposed in the clearance groove.

[0043] 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.

[0044] In some embodiments, the support components correspond one-to-one with the heat exchange components.

[0045] 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.

[0046] In some embodiments, the dimension of the support component in the second direction is greater than or equal to the dimension of the heat exchanger in the second direction.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] In some embodiments, the rigidity of the support component is greater than that of the heat exchanger.

[0051] 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.

[0052] In some embodiments, the support component is an insulating element.

[0053] 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.

[0054] In some embodiments, the support component is made of plastic.

[0055] In some embodiments, the support component is an insulating adhesive layer.

[0056] 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.

[0057] In some embodiments, at least two flexible elements are configured as metal plasticized films.

[0058] 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.

[0059] In some embodiments, at least two flexible elements are configured as aluminum-plastic films.

[0060] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0061] In some embodiments, the flexible element has a layered structure, comprising a metal layer and a non-metal layer, which are stacked sequentially.

[0062] 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.

[0063] In some embodiments, the metal layer includes one or more of aluminum foil, copper foil, and steel foil.

[0064] This allows flexible components to have a certain structural strength and to serve as an isolation mechanism.

[0065] In some embodiments, the non-metallic layer includes one or more of polypropylene, polyvinyl chloride, and polyethylene.

[0066] This allows flexible components to have a certain degree of waterproofing.

[0067] In some embodiments, the non-metallic layer is a hot-melt layer.

[0068] 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.

[0069] In some embodiments, the flexible component has a layered structure, comprising a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged sequentially, with the waterproof layer being closer to the flow channel area than the corrosion-resistant layer.

[0070] 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.

[0071] In some embodiments, the thickness of the isolation layer is 6.5 μm-100 μm.

[0072] 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.

[0073] In some embodiments, the thickness of the isolation layer is 6.5 μm-15 μm.

[0074] 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.

[0075] In some embodiments, the thickness of the corrosion-resistant layer is 5μm-20μm.

[0076] 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.

[0077] In some embodiments, the thickness of the waterproof layer is 50μm-120μm.

[0078] 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.

[0079] In some embodiments, the thickness of the flexible element is 0.05mm-0.3mm.

[0080] 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.

[0081] In some embodiments, the thickness of the flexible element is 0.08mm-0.2mm.

[0082] 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.

[0083] In some embodiments, the elastic modulus of the flexible element is 0.1 MPa-10000 MPa.

[0084] 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.

[0085] A second aspect of this disclosure provides a heat exchange component, which is the heat exchange component of the battery device described above, and is used to exchange heat with a single battery cell assembly.

[0086] 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.

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

[0088] 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.

[0089] A fourth aspect of this disclosure provides an energy storage device, including the battery device described above or the heat exchange component described above.

[0090] 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

[0091] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of this disclosure;

[0092] Figure 2 is an exploded perspective view of a battery device provided in an embodiment of the present disclosure;

[0093] Figure 3 is a structural schematic diagram of the second housing portion provided in an embodiment of this disclosure;

[0094] Figure 4 is a schematic diagram of the structure of the battery pack and heat exchange unit provided in an embodiment of the present disclosure;

[0095] Figure 5 is an exploded view of Figure 4;

[0096] Figure 6 is a schematic diagram of the structure of a heat exchange unit provided in an embodiment of the present disclosure;

[0097] Figure 7 is an enlarged view of point A in Figure 6;

[0098] Figure 8 is an exploded view of Figure 6;

[0099] Figure 9 is a schematic diagram of the structure of a battery cell assembly and a heat exchange assembly provided in an embodiment of this disclosure;

[0100] Figure 10 is a cross-sectional view along the BB direction in Figure 9.

[0101] Figure 11 is an enlarged view of point C in Figure 9.

[0102] Explanation of reference numerals in the attached drawings: 10. Battery cell assembly; 11. Battery cell; 111. First side surface; 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

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

[0104] Unless otherwise specified, all technical features and optional technical features of this disclosure can be combined to form new technical solutions.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0110] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0111] In some implementations, the electrode assembly is a stacked structure.

[0112] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0113] 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.

[0114] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0115] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0116] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0117] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] In some embodiments, energy storage devices include energy storage containers, energy storage cabinets, etc.

[0124] 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.

[0125] 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.

[0126] Therefore, in order to improve the heat exchange efficiency and effect of the heat exchange assembly, this disclosure 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 the flexible members. The heat exchange channel is used to conduct a heat exchange medium, which exchanges heat with the battery cell assembly.

[0127] The battery 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 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.

[0128] The technical solutions described in this disclosure are applicable to electrical devices that use battery devices. The electrical devices include battery devices according to any embodiment of this disclosure, and the battery devices are used to provide electrical energy.

[0129] 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 disclosure does not impose any special limitations on the above-mentioned electrical equipment.

[0130] It should be noted that the technical solutions described in this disclosure are not limited to the battery devices and electrical equipment described above, but can also be applied to all battery devices including housing assemblies and electrical equipment using battery devices. However, for the sake of brevity, the following embodiments are all described using electric vehicles as examples.

[0131] Referring to Figure 1, a controller 200, a motor 300, and a battery device 100 can be installed inside the vehicle 100. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 can be installed at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000. For example, the battery device 100 can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 1000. In another embodiment of this disclosure, the battery device 100 can not only serve as the operating power source for the vehicle 1000 but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0132] Referring to Figure 2, to 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.

[0133] Referring to Figures 2 to 4, this disclosure 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. Referring to Figure 11, the at least two flexible members are stacked, and a heat exchange channel 3221 is formed between the flexible members. The heat exchange channel 3221 is used to conduct a heat exchange medium, which exchanges heat with the battery cell assembly 10.

[0134] Referring 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.

[0135] 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.

[0136] 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.

[0137] For example, the housing assembly 20 is typically a cuboid structure. Both the length and width directions of the housing assembly 20 are parallel to the horizontal plane, and the length direction of the housing assembly 20 is parallel to the longest side of its cuboid structure. The height direction of the housing assembly 20 is perpendicular to the ground. For example, as shown in Figures 2 and 3, the length direction of the housing assembly 20 is represented by X, the width direction by Y, and the height direction by Z.

[0138] 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.

[0139] Please refer to Figures 2 to 11. This embodiment of the present disclosure provides a heat exchange component 30. The heat exchange component 30 is the heat exchange component 30 of the battery device 100 provided in this embodiment of the present disclosure. The heat exchange component 30 is used to exchange heat with the battery cell assembly 10.

[0140] 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.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] The heat exchange medium flows through the heat exchange channel 3221 to exchange heat with the battery cell assembly 10.

[0145] 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.

[0146] 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.

[0147] It should be noted that the specific number of heat exchange channels 3221 is not limited here. There can be one or more.

[0148] In this disclosure, "multiple" refers to two or more items.

[0149] 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.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] 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.

[0155] The battery device provided in this embodiment 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.

[0156] The housing assembly 20 is used to house the battery cell assembly 10, and the housing assembly 20 can have various structures. In some embodiments, referring to FIG2, the housing assembly 20 includes a housing body 21, which may include a first housing portion 211 and a second housing portion 212. The first housing portion 211 and the second housing portion 212 cover each other, and the first housing portion 211 and the second housing portion 212 together define a receiving cavity 23 for housing 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 covers the open side of the second housing portion 212 to form a housing body 21 with a receiving cavity 23; the first housing portion 211 and the second housing portion 212 may also be hollow structures with one side open, and the open side of the first housing portion 211 covers the open side of the second housing portion 212 to form a housing body 21 with a receiving cavity 23. Of course, the first box portion 211 and the second box portion 212 can be of various shapes, such as cylinders, cuboids, etc.

[0157] 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.

[0158] 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.

[0159] 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.

[0160] In some embodiments, referring to FIG2, the battery cell assembly 10 includes a plurality of battery cells 11, and the heat exchange assembly 30 is located between the battery cells 11.

[0161] 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.

[0162] In this embodiment, by placing the heat exchange component 30 between the battery cells 11—that is, not at the bottom of the battery cells 11—the overall rigidity of the battery device 100 is improved, thereby enhancing its reliability. 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, thus improving heat exchange efficiency and effect.

[0163] In some embodiments, referring to Figures 2 and 5, the battery cell assembly 10 includes a plurality of battery cells 11, each battery cell 11 having a plurality of sides, including a first side 111, which is the side with the smallest area among the plurality of sides. The heat exchange assembly 30 is located on one side of the first side 111 of the battery cell 11.

[0164] It should be noted that the first side 111 in this embodiment 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.

[0165] 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.

[0166] 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.

[0167] 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.

[0168] 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.

[0169] 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.

[0170] 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.

[0171] 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.

[0172] 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.

[0173] This embodiment of the disclosure, 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—advantages to improve the overall rigidity of the battery device 100, 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.

[0174] In some embodiments, referring to Figures 2 to 5 and Figures 9 to 11, the battery cell assembly 10 includes a plurality of battery packs 12 arranged along a second direction. The battery cell 11 includes a plurality of sides, including a first side 111, which is the side with the smallest area among the plurality of sides, and the first direction is parallel to the first side 111.

[0175] 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.

[0176] Here, the heat exchange component 30 may be disposed between adjacent battery packs 12.

[0177] 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.

[0178] In some embodiments, referring to Figures 2 to 11, the heat exchange assembly 30 includes at least one heat exchange unit 32. The heat exchange unit 32 includes a first current collector 321 and a plurality of heat exchange elements 322 arranged along a first direction. The heat exchange elements 322 have heat exchange channels 3221. The plurality of heat exchange elements 322 are all in communication with the first current collector 321.

[0179] 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.

[0180] 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.

[0181] 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.

[0182] 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.

[0183] 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.

[0184] 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.

[0185] 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.

[0186] For example, the second manifold is provided with an inlet and an outlet, which are used for connecting to the pipelines of the vehicle.

[0187] 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.

[0188] 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.

[0189] 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.

[0190] In some embodiments, referring 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.

[0191] 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.

[0192] 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.

[0193] 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.

[0194] 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.

[0195] In some embodiments, referring 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 communicates with the inlet 3222 of the heat exchange unit 32, and the second conveying member 3225 communicates with the outlet 3223 of the heat exchange unit 32.

[0196] 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.

[0197] The first conveying component 3224 is, for example, a pipe fitting, the interior of which has a conveying channel.

[0198] The second conveying component 3225 is, for example, a pipe fitting, the interior of which has a conveying channel.

[0199] 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.

[0200] 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.

[0201] 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.

[0202] 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.

[0203] 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.

[0204] 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.

[0205] 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.

[0206] In some embodiments, please refer to Figures 4 to 8. Each heat exchange unit 32 includes two heat exchange elements 322, and the inlet 3222 and outlet 3223 of the two heat exchange elements 322 are respectively disposed at the ends of the two heat exchange elements 322 that are close to each other.

[0207] 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.

[0208] 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.

[0209] 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.

[0210] 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.

[0211] Here, the second direction is the thickness direction of the heat exchanger 322.

[0212] 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.

[0213] 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.

[0214] In some embodiments, the hardness of the first current collector 321 is greater than the hardness of the heat exchanger 322.

[0215] Here, the greater the hardness of the first current collector 321, the more difficult it is to be squeezed, deformed, or damaged.

[0216] 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.

[0217] In some embodiments, as shown in Figures 5 to 11, the heat exchange unit 32 includes a support assembly 323, which is sandwiched between two adjacent battery packs 12.

[0218] 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.

[0219] 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.

[0220] 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.

[0221] 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.

[0222] 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.

[0223] In some embodiments, referring to Figures 5 to 11, the support assembly 323 includes a first support member 3231 extending along a first direction, the first support member 3231 being disposed at at least one end of the heat exchange member 322 along the height direction.

[0224] 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.

[0225] 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.

[0226] 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.

[0227] Here, the first support member 3231 can be bonded or heat-fused to the heat exchange member 322.

[0228] 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.

[0229] In some embodiments, referring 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 a first direction.

[0230] 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.

[0231] 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.

[0232] 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.

[0233] The specific number of the second support member 3232 is not limited here.

[0234] 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.

[0235] In some embodiments, as shown in Figures 6 and 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.

[0236] 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.

[0237] In some embodiments, please refer to Figures 5 to 8, where the support component 323 corresponds one-to-one with the heat exchanger 322.

[0238] 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.

[0239] 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.

[0240] 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.

[0241] Here, the second direction is the thickness direction of the heat exchanger 322.

[0242] 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.

[0243] 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.

[0244] 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.

[0245] 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.

[0246] 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.

[0247] 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.

[0248] In some embodiments, the hardness of the support component 323 is greater than the hardness of the heat exchanger 322.

[0249] Here, the greater the rigidity of the support component 323, the less likely it is to be deformed or damaged by compression.

[0250] 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.

[0251] In some embodiments, the support component 323 is an insulating element.

[0252] For example, the flexible component has a layered structure, including a metal layer and a non-metal layer, which are stacked sequentially.

[0253] For example, the battery device 100 includes a plate that is disposed on top of the battery cell assembly 10.

[0254] 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.

[0255] For example, the support component 323 is a plastic part.

[0256] In some embodiments, the support component 323 is an insulating adhesive layer.

[0257] 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.

[0258] 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.

[0259] In some embodiments, at least two flexible elements are configured as metal plasticized films.

[0260] The flexible component is a single-layer or multi-layer thin film.

[0261] Here, the metal plastic film is a metal-plastic composite material, which includes a metal layer and a plastic layer.

[0262] 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.

[0263] For example, at least two flexible elements are configured as aluminum-plastic film.

[0264] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0265] In some embodiments, the flexible member has a layered structure, comprising a metal layer and a non-metal layer, which are stacked sequentially.

[0266] 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.

[0267] For example, the metal layer and the non-metal layer can be formed by hot pressing or hot melting.

[0268] Here, there is no limit to the number of metal layers and non-metal layers.

[0269] 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.

[0270] In some embodiments, the metal layer includes one or more of aluminum foil, copper foil, and steel foil.

[0271] 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.

[0272] In some embodiments, the non-metallic layer includes one or more of polypropylene, polyvinyl chloride, and polyethylene.

[0273] By using one or more of polypropylene, polyvinyl chloride, and polyethylene as the non-metallic layer, flexible components can be made waterproof.

[0274] 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.

[0275] In some embodiments, the non-metallic layer is a hot-melt layer.

[0276] 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.

[0277] In some embodiments, the flexible element has a layered structure, and includes 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.

[0278] Here, the corrosion-resistant layer can be a nylon layer made of nylon material, which has certain corrosion resistance properties, such as resistance to acid and alkali corrosion.

[0279] The isolation layer can be a metal layer, which can be one or more of aluminum foil, copper foil, and steel foil, giving the flexible component a certain structural strength and enabling it to serve as an isolation layer.

[0280] 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.

[0281] 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.

[0282] In some embodiments, the thickness of the isolation layer is 6.5 μm-100 μm.

[0283] 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.

[0284] 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.

[0285] In some embodiments, the thickness of the isolation layer is 6.5 μm-15 μm.

[0286] 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.

[0287] 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.

[0288] In some embodiments, the thickness of the corrosion-resistant layer is 5μm-20μm.

[0289] 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.

[0290] 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.

[0291] In some embodiments, the thickness of the waterproof layer is 50μm-120μm.

[0292] 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.

[0293] 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.

[0294] In some embodiments, the thickness of the flexible element is 0.05mm-0.3mm.

[0295] 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.

[0296] 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.

[0297] In some embodiments, the thickness of the flexible element is 0.08 mm to 0.2 mm.

[0298] 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.

[0299] 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.

[0300] In some embodiments, the elastic modulus of the flexible component is 0.1 MPa-10000 MPa.

[0301] 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.

[0302] 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.

[0303] 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.

[0304] 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.

[0305] 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.

[0306] 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.

[0307] 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.

[0308] In the description of this disclosure, references to terms such as "in one embodiment," "in some embodiments," "in other embodiments," "in yet another embodiment," or "exemplary," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the embodiments of this disclosure. In this disclosure, 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 any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine the different embodiments or examples described in this disclosure and the features of the different embodiments or examples without contradiction.

[0309] The above are merely preferred embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure are included within the scope of protection of this disclosure.

Claims

A battery device, comprising: The housing assembly has an internal cavity; A battery cell assembly is disposed within the receiving cavity; A heat exchange assembly is disposed within the receiving cavity, wherein the heat exchange assembly includes at least two flexible members, the at least two flexible members are stacked, and a heat exchange channel is formed between the flexible members. The heat exchange channel is used to conduct heat exchange medium, and the heat exchange medium is used to exchange heat with the battery cell assembly. According to claim 1, the battery device, wherein, The battery cell assembly includes multiple battery cells, and the heat exchange assembly is located between the battery cells. The battery device according to claim 1 or 2, wherein, The battery cell assembly includes multiple battery cells, each battery cell having multiple sides, including a first side which is the side with the smallest area among the multiple sides, wherein the heat exchange assembly is located on one side of the first side of the battery cell. The battery device according to any one of claims 1 to 3, wherein, The battery cell assembly includes at least one battery pack, the battery pack includes a plurality of battery cells arranged along a first direction, and the heat exchange assembly is disposed on at least one side of the battery pack along a second direction, the first direction intersecting the second direction. The battery device according to claim 4, wherein, The battery cell assembly includes multiple battery packs, which are arranged along the second direction; the battery cell includes multiple sides, including a first side, which is the side with the smallest area among the multiple sides, and the first direction is parallel to the first side. The battery device according to claim 4 or 5, wherein, The heat exchange assembly includes at least one heat exchange unit, the heat exchange unit includes a first collector and a plurality of heat exchange elements arranged along the first direction, the heat exchange elements have the heat exchange channel, and the plurality of heat exchange elements are all in communication with the first collector. The battery device according to claim 6, wherein, The heat exchange assembly includes a second current collector and a plurality of heat exchange units arranged along a second direction, wherein the first current collector of the plurality of heat exchange units is in communication with the second current collector. The battery device according to claim 6 or 7, wherein, The heat exchanger has an inlet and an outlet, both of which are connected to the heat exchange channel; the inlet of the same heat exchanger unit is located on the same side of the heat exchanger unit along the second direction, and the outlet of the same heat exchanger unit is located on the same side of the heat exchanger unit along the second direction. The battery device according to claim 8, wherein, The first current collector includes a first conveying member and a second conveying member. The first conveying member and the second conveying member are disposed on opposite sides of the heat exchange unit along the second direction. The first conveying member is connected to the inlet of the heat exchange unit, and the second conveying member is connected to the outlet of the heat exchange unit. The battery device according to any one of claims 6 to 9, wherein, 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. The battery device according to claim 10, wherein, 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. The battery device according to claim 10 or 11, wherein, The hardness of the first current collector is greater than the hardness of the heat exchanger. The battery device according to any one of claims 8 to 12, wherein, 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. The battery device according to any one of claims 6 to 13, wherein, The heat exchange unit includes a support assembly sandwiched between two adjacent battery packs. The battery device according to claim 14, wherein, 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. The battery device according to claim 15, wherein, The support assembly further includes a second support member extending along the height direction of the battery device, the second support member being located at one end of the first support member along the first direction. The battery device according to claim 16, wherein, 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. The battery device according to any one of claims 14 to 17, wherein, The support components correspond one-to-one with the heat exchanger components. The battery device according to any one of claims 14 to 18, wherein, The dimension of the support component in the second direction is greater than or equal to the dimension of the heat exchanger in the second direction. The battery device according to any one of claims 14 to 19, wherein, The dimension of the support component in the second direction is greater than 0 and less than or equal to 10 mm. The battery device according to any one of claims 14 to 20, wherein, The hardness of the support component is greater than that of the heat exchanger. The battery device according to any one of claims 14 to 21, wherein, The support component is an insulating element. The battery device according to claim 22, wherein, The support component is made of plastic. The battery device according to any one of claims 14 to 21, wherein, The supporting component is an insulating adhesive layer. The battery device according to any one of claims 1 to 24, wherein, The at least two flexible components are configured as metal plasticized films. The battery device according to claim 25, wherein, The at least two flexible components are configured as aluminum-plastic films. The battery device according to any one of claims 1-26, wherein, The flexible component has a layered structure, comprising a metal layer and a non-metal layer, which are stacked sequentially. The battery device according to claim 27, wherein, The metal layer includes one or more of aluminum foil, copper foil, and steel foil. The battery device according to claim 27 or 28, wherein, The non-metallic layer includes one or more of polypropylene, polyvinyl chloride, and polyethylene. The battery device according to claim 27, wherein, The non-metallic layer is a hot-melt layer. The battery device according to any one of claims 1-26, wherein, The flexible component has a layered structure, comprising a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged sequentially, with the waterproof layer being closer to the heat exchange channel than the corrosion-resistant layer. The battery device according to claim 31, wherein, The thickness of the isolation layer is 6.5μm-100μm. The battery device according to claim 32, wherein, The thickness of the isolation layer is 6.5μm-15μm. The battery device according to any one of claims 31 to 33, wherein, The thickness of the corrosion-resistant layer is 5μm-20μm. The battery device according to any one of claims 31 to 34, wherein, The thickness of the waterproof layer is 50μm-120μm. The battery device according to any one of claims 1-35, wherein, The thickness of the flexible component is 0.05mm-0.3mm. The battery device according to claim 36, wherein, The thickness of the flexible component is 0.08mm-0.2mm. The battery device according to any one of claims 1-37, wherein, The elastic modulus of the flexible component is 0.1 MPa-10000 MPa. A heat exchange component, wherein the heat exchange component is the heat exchange component of the battery device according to any one of claims 1-38, the heat exchange component being used to exchange heat with the battery cell assembly. An electrical device comprising a battery device according to any one of claims 1-38 or a heat exchange assembly according to claim 39. An energy storage device includes a battery device according to any one of claims 1-38 or a heat exchange component according to claim 39.

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