Heat exchange assembly, battery device, energy storage device and power utilization device

Abstract

The embodiment of the utility model provides a heat exchange assembly, a battery device, an energy storage device and a power utilization device. The battery device comprises a box body, a battery monomer assembly and a heat exchange assembly, the battery monomer assembly is arranged in the box body; the heat exchange assembly comprises at least two heat exchange parts, at least one heat exchange part is arranged to be a flexible part, the at least two heat exchange parts are arranged in a stacked mode, at least one medium flow channel is formed between the heat exchange parts, the at least one medium flow channel is used for conducting a heat exchange medium, and the heat exchange medium is used for conducting heat exchange with the battery monomer assembly. The heat exchange assembly of the battery device provided by the embodiment of the utility model comprises the flexible part, the mass of the flexible part is relatively light, the mass of the heat exchange assembly is favorably reduced, the production cost of the heat exchange assembly is reduced, and the heat exchange assembly can be better attached to the box body and / or the battery monomer assembly, so that the heat exchange efficiency and the heat exchange effect of the heat exchange assembly are improved.

Description

[0001] This disclosure is based on and claims priority to patent application number PCT / CN2024 / 114643, filed on August 26, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, and in particular to a heat exchange component, a battery device, an energy storage device, and an electrical device. Background Technology

[0003] In new energy vehicles equipped with battery devices, the battery devices can provide all or part of the power. During the use of the battery devices, the individual battery cells generate heat. If this heat is too high, it will adversely affect the performance and lifespan of the battery device. Therefore, how to effectively dissipate heat from the individual battery cells while reducing the weight of the heat exchange components has become an important research direction in this field. Utility Model Content

[0004] In view of this, embodiments of this application aim to provide a heat exchange component, a battery device, an energy storage device, and an electrical device, which can reduce the weight of the heat exchange component to a certain extent.

[0005] Therefore, a first aspect of the embodiments of this application provides a battery device, including:

[0006] Box;

[0007] A battery cell assembly, wherein the battery cell assembly is disposed within the housing;

[0008] A heat exchange assembly includes at least two heat exchange elements, at least one of which is a flexible element. The at least two heat exchange elements are stacked and at least one medium flow channel is formed between the heat exchange elements. The at least one medium flow channel is used to conduct heat exchange medium, which is used to exchange heat with the battery cell assembly.

[0009] The battery device provided in this application includes a housing, battery cell assemblies, and a heat exchange assembly. The battery cell assemblies are disposed within the housing, and the housing protects them. The heat exchange assembly exchanges heat with the battery cell assemblies. Firstly, the heat exchange assembly includes flexible components, which are lightweight, reducing the overall weight and production cost of the heat exchange assembly, and also contributing to a lighter battery device. Secondly, by including a flexible structure, the heat exchange assembly can better fit with the housing and / or battery cell assemblies, thus facilitating the absorption of assembly tolerances. This eliminates the need for sealants or thermally conductive materials, improving the fit between the heat exchange assembly and the housing and / or battery cell assemblies, increasing the effective heat exchange area, and ultimately enhancing the heat exchange efficiency and effect.

[0010] In some embodiments, at least one of the heat exchange elements is configured as a rigid element, and the flexible element is stacked with the rigid element to form the medium flow channel.

[0011] Here, by setting at least one heat exchanger as a rigid component, the rigid component can support the flexible component, which helps to improve the structural strength and stability of the heat exchange assembly, and further improves the heat exchange efficiency and heat exchange effect of the heat exchange assembly.

[0012] In some embodiments, the housing and the heat exchange assembly enclose a receiving cavity, and the battery cell assembly is disposed within the receiving cavity.

[0013] This helps reduce the amount of material used in the housing, further reducing the weight of the heat exchange components and lowering costs. In addition, it allows the heat exchange components to come into direct contact with the battery cells, thereby further improving the heat exchange efficiency between the heat exchange components and the battery cells.

[0014] In some embodiments, the flexible member and the rigid member are hot-pressed to form a hot-pressed region and a medium flow channel, and the flexible member and the rigid member are interconnected in at least a portion of the hot-pressed region.

[0015] In this embodiment, the flexible component is sealed by a hot pressing process, that is, a hot pressing area is formed by hot pressing. The hot pressing area divides the heat exchange component to form at least one medium flow channel. This molding method is simple.

[0016] In some embodiments, the heat exchange assembly further includes a support member disposed in the hot-pressing region and located on the side of the flexible member opposite to the rigid member.

[0017] In this embodiment, by setting a support member and placing the support member in the hot-pressing area, it can be used to support the flexible member, thereby improving the stability of the flexible member.

[0018] In some embodiments, the heat exchange assembly further includes an adhesive layer, through which the support member and the flexible member are bonded.

[0019] In this embodiment, the support and the flexible component are bonded together by an adhesive layer, which is a simple connection method.

[0020] In some embodiments, the flexible element is configured as a metal plasticized film.

[0021] In this embodiment, because the metal plasticized film is thin and lightweight, and because it forms a medium flow channel between the metal plasticized film and the heat exchanger, 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. Simultaneously, because the heat exchange assembly has insulating properties, the risk of insulation failure can be reduced. This also reduces the risk of the heat exchange assembly reacting with the internally flowing heat exchange medium, further reducing the risk of heat exchange medium corrosion and leakage.

[0022] In some embodiments, the flexible element is configured as an aluminum-plastic film.

[0023] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0024] In some embodiments, the flexible element is a layered structure, comprising a metal layer and a non-metal layer, wherein the metal layer and the non-metal layer are stacked sequentially.

[0025] In this embodiment, the flexible component, composed of sequentially stacked metal and non-metal layers, is thin and lightweight. Furthermore, by forming a media flow channel 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.

[0026] In some embodiments, the metal layer includes one or more of aluminum foil, copper foil, and steel foil.

[0027] 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.

[0028] In some embodiments, the non-metallic layer includes one or more of polypropylene, polyvinyl chloride, and polyethylene.

[0029] This allows flexible components to have a certain degree of waterproofing.

[0030] In some embodiments, the non-metallic layer is a hot-melt layer.

[0031] 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.

[0032] In some embodiments, the flexible element has a layered structure, comprising a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged sequentially, wherein the waterproof layer is closer to the medium flow channel than the corrosion-resistant layer.

[0033] 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 medium flow channel than the corrosion-resistant layer, which helps to improve the reliability of the heat exchange component.

[0034] In some embodiments, the thickness of the isolation layer is 6.5 μm-100 μm.

[0035] This allows flexible components to possess both structural strength and flexibility.

[0036] In some embodiments, the thickness of the isolation layer is 6.5 μm-15 μm.

[0037] This can further enable flexible components to possess a certain degree of structural strength and flexibility.

[0038] In some embodiments, the thickness of the corrosion-resistant layer is 5μm-20μm.

[0039] It can improve the wear resistance and toughness of flexible parts.

[0040] In some embodiments, the thickness of the waterproof layer is 50μm-120μm.

[0041] This allows the waterproof layer to have a certain structural strength, improving its waterproof performance, and also facilitates the hot-pressing connection of flexible components through the waterproof layer.

[0042] In some embodiments, the thickness of the flexible element is 0.05mm-0.3mm.

[0043] In this embodiment, by setting the thickness of the flexible component to 0.05mm-0.3mm, the heat exchange component made of the flexible component has a certain structural strength while the overall thickness of the heat exchange component is small, which is beneficial to reduce the overall volume and weight of the battery device and increase the energy density of the battery device.

[0044] In some embodiments, the thickness of the flexible element is 0.08 mm to 0.2 mm.

[0045] In this embodiment, by setting the thickness of the flexible component to 0.08mm-0.2mm, the heat exchange component made of the flexible component has a certain structural strength, while further reducing the overall thickness of the heat exchange component. This is beneficial to further reduce the overall volume and weight of the battery device, thereby further increasing the energy density of the battery device.

[0046] In some embodiments, the elastic modulus of the flexible element is 0.1 MPa-10000 MPa.

[0047] 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 and / or the battery module and battery cell assembly, thereby increasing the effective heat exchange area between the heat exchange assembly and the housing and / or the battery module and battery cell assembly, and thus improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly.

[0048] In some embodiments, the battery device further includes a bottom cover plate disposed on the side of the heat exchange assembly opposite to the battery cell assembly.

[0049] By placing the bottom guard plate on the side of the heat exchange assembly away from the battery cell assembly, it can protect the heat exchange assembly and the housing, reduce the impact of external debris on the housing during driving, and improve the reliability of the battery device.

[0050] In some embodiments, the rigid member is a metal plate.

[0051] In this embodiment, by setting the rigid component as a metal plate, the metal plate has both good structural strength and good thermal conductivity. In other words, while ensuring that the heat exchange component has a certain heat exchange efficiency, the rigid component can also provide some support for the flexible component.

[0052] In some embodiments, the battery cell assembly includes multiple battery cells, the medium flow channel includes multiple sub-flow channels, each battery cell corresponds to multiple sub-flow channels, and the extension direction of the sub-flow channel corresponding to the battery cell is perpendicular to the length direction of the battery cell.

[0053] By assigning multiple sub-channels to each battery cell, it is beneficial to improve the temperature uniformity of the battery cells.

[0054] In some embodiments, the flexible member has a layered structure, comprising a metal layer and a non-metal layer, wherein the metal layer and the non-metal layer are stacked sequentially, and the non-metal layer is disposed on the side of the metal layer facing the rigid member.

[0055] Here, by placing a non-metallic layer on the side of the metal layer facing the rigid component, the non-metallic layer can be thermally pressed to connect with the rigid component.

[0056] A second aspect of this application provides a heat exchange component, which is the heat exchange component of the battery device described above, and the heat exchange component is used to exchange heat with the battery cell assembly.

[0057] A third aspect of this application provides an energy storage device, characterized in that it includes the battery device or the heat exchange component described above.

[0058] A fourth aspect of this application provides an electrical device, including the battery device described above, the heat exchange component described above, or the heat exchange component described above. Attached Figure Description

[0059] Figure 1 This is a schematic diagram of the structure of a vehicle provided in an embodiment of the present disclosure;

[0060] Figure 2 This is an exploded perspective view of a battery device provided in an embodiment of the present disclosure;

[0061] Figure 3 This is an exploded perspective view of a heat exchange component provided in an embodiment of the present disclosure;

[0062] Figure 4 An exploded perspective view of a flexible component provided in an embodiment of this disclosure;

[0063] Figure 5 This is an exploded perspective view of a flexible component and a rigid component provided in an embodiment of this disclosure;

[0064] Figure 6 This is a partial structural schematic diagram of a heat exchange component provided in an embodiment of the present disclosure;

[0065] Figure 7 This is an exploded perspective view of the flexible component, support component, and bottom protective plate provided in an embodiment of the present disclosure.

[0066] Explanation of reference numerals in the attached figures

[0067] 10. Battery cell assembly; 11. Battery cell; 20. Housing; 21. Housing body; 211. First housing section; 212. Second housing section; 22. Bottom protective plate; 23. Receiving cavity; 30. Heat exchange assembly; 31. Flexible component; 311. Hot pressing area; 312. Medium flow channel; 313. Corrosion resistant layer; 314. Insulation layer; 315. Waterproof layer; 32. Rigid component; 33. Support component; 34. Connector; 100. Battery device; 200. Controller; 300. Motor; 1000. Vehicle. Detailed Implementation

[0068] Unless otherwise specified, all embodiments and optional embodiments of this disclosure can be combined to form new technical solutions.

[0069] Unless otherwise specified, all technical features and optional technical features of this disclosure can be combined to form new technical solutions.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0075] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0076] In some implementations, the electrode assembly is a stacked structure.

[0077] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0078] 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.

[0079] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0080] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0081] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0082] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] In some embodiments, energy storage devices include energy storage containers, energy storage cabinets, etc.

[0089] 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.

[0090] 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 while reducing the weight of the heat exchange components 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, the aluminum water-cooled plates in this cooling system are quite heavy.

[0091] In view of this, in order to reduce the weight of the heat exchange assembly, this disclosure provides a battery device including a housing, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is disposed within the housing. The heat exchange assembly includes at least two heat exchange elements, at least one of which is a flexible element. The at least two heat exchange elements are stacked, and at least one medium flow channel is formed between the heat exchange elements. The at least one medium flow channel is used to conduct a heat exchange medium for exchanging heat with the battery cell assembly.

[0092] The battery device provided in this application includes a housing, battery cell assemblies, and a heat exchange assembly. The battery cell assemblies are disposed within the housing, and the housing protects them. The heat exchange assembly exchanges heat with the battery cell assemblies. Firstly, the heat exchange assembly includes flexible components, which are lightweight, reducing the overall weight and production cost of the heat exchange assembly, and also contributing to a lighter battery device. Secondly, by including a flexible structure, the heat exchange assembly can better fit with the housing and / or battery cell assemblies, thus facilitating the absorption of assembly tolerances. This eliminates the need for sealants or thermally conductive materials, improving the fit between the heat exchange assembly and the housing and / or battery cell assemblies, increasing the effective heat exchange area, and ultimately enhancing the heat exchange efficiency and effect.

[0093] The technical solutions described in this disclosure are applicable to electrical devices that use battery devices. The electrical device includes the battery device according to any embodiment of this disclosure, and the battery device is used to provide electrical energy.

[0094] Electrical devices 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 devices.

[0095] It should be noted that the technical solutions described in this disclosure are not limited to the battery devices described above, but can also be applied to all electrical devices and energy storage devices that include battery devices. However, for the sake of brevity, the following embodiments are all described using electric vehicles as examples.

[0096] Please refer to Figure 1 The vehicle 1000 may contain a controller 200, a motor 300, and a battery device 100. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 may be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, it can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation. 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, replacing or partially replacing fuel or natural gas to provide driving power to the vehicle 1000.

[0097] Please see Figure 2To meet different power demands, the battery device 100 includes a battery cell assembly 10, which may include multiple battery cells 11. A battery cell 11 is the smallest unit that makes up a module or package of the battery device 100. Multiple battery cells 11 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 11 are connected in both series and parallel connections. Multiple battery cells 11 can be directly connected in series, parallel, or in a mixed configuration and then housed within a housing 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 20. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between 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.

[0098] Please see Figures 1 to 7 This disclosure provides a battery device 100, which includes a housing 20, a battery cell assembly 10, and a heat exchange assembly 30. The battery cell assembly 10 is disposed within the housing 20. The heat exchange assembly 30 includes at least two heat exchange elements, at least one of which is a flexible element 31. The at least two heat exchange elements are stacked, and at least one medium flow channel 312 is formed between the heat exchange elements. The at least one medium flow channel 312 is used to conduct heat exchange medium for heat exchange with the battery cell assembly 10.

[0099] Please refer to Figure 2 The battery device 100 includes a housing 20 and a battery cell assembly 10. The battery cell assembly 10 includes at least one battery cell 11, which is disposed within the housing 20.

[0100] The enclosure 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 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.

[0101] The housing 20 is used to encapsulate the battery cell assembly 10. The housing 20 can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cell assembly 10.

[0102] For example, the box 20 is typically a cuboid structure, with both its length and width directions parallel to the horizontal plane. The length direction of the box 20 is parallel to the longest side of its cuboid structure. The height of the box 20 is perpendicular to the ground. For example, as... Figure 2 As shown, the length direction of the box 20 is represented by X, the width direction of the box 20 is represented by Y, and the height direction of the box 20 is represented by Z.

[0103] This disclosure provides a heat exchange assembly 30, which includes at least two heat exchange elements, at least one of which is configured as a flexible element 31. The at least two heat exchange elements are stacked and at least one medium flow channel 312 is formed between the heat exchange elements. The at least one medium flow channel 312 is used to conduct heat exchange medium, which is used to exchange heat with the battery cell assembly 10.

[0104] 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.

[0105] At least one medium flow channel 312 is formed between the rigid members of the heat exchange component, meaning that the heat exchange assembly 30 forms a medium flow channel 312 between the rigid members of the heat exchange component. The heat exchange medium flows within the medium flow channel 312 to achieve heat exchange with the battery cell assembly 10.

[0106] 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.

[0107] It should be noted that the specific number of medium flow channels 312 is not limited here. There can be one or more.

[0108] The "multiple" mentioned in the embodiments of this disclosure refers to two or more items.

[0109] The heat exchange assembly 30 includes at least two heat exchange elements, that is, the number of heat exchange elements is multiple.

[0110] Setting at least one heat exchanger as a flexible element 31 means that all heat exchangers can be set as flexible elements 31, or some heat exchangers can be set as flexible elements 31 and the other part can be non-flexible elements.

[0111] 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 channel 312 through the inlet of heat exchange component 30. After the heat exchange medium exchanges heat with battery cell assembly 10, the heat exchange medium flows out through the outlet of heat exchange component 30, thus completing the heat exchange of battery cell assembly 10.

[0112] 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.

[0113] 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 312 through the inlet 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 of the heat exchange component 30, releasing the heat and completing the cooling and heat dissipation of battery cell assembly 10.

[0114] 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 312 through the inlet 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 of the heat exchange component 30, thus completing the heating of the battery cell assembly 10.

[0115] The flexible component 31 is configured as a flexible structure. The flexible component 31 has certain expandable or contractible characteristics. It can also be understood that the flexible component 31 can be an elastically deformable structure. The flexible component 31 has the ability to deform and recover its deformation, so that the heat exchange assembly 30 can be formed into a contoured structure. The heat exchange assembly 30 can better adapt to the external contour shape of the battery cell 11 or other components, so as to improve the fit between the heat exchange assembly 30 and the housing 20 and / or the battery cell assembly 10, thereby increasing the effective heat exchange area between the heat exchange assembly 30 and the housing 20 and / or the battery cell assembly 10, and thus improving the heat exchange efficiency.

[0116] It should be noted that the flexible component 31 can be conductive, which helps to maintain an equipotential setting with the housing 20; the flexible component 31 can also be electrically insulating, eliminating the need for insulation treatment, which helps to reduce the leakage risk and production cost of the battery device 100, thereby improving the reliability of the battery device 100.

[0117] The battery device 100 provided in this application embodiment includes a housing 20, a battery cell assembly 10, and a heat exchange assembly 30. The battery cell assembly 10 is disposed inside the housing 20, and the housing 20 protects the battery cell assembly 10. The heat exchange component 30 is used to exchange heat with the battery cell assembly 10. On the one hand, the heat exchange component 30 includes a flexible element 31, which is lightweight, thus reducing the weight of the heat exchange component 30, lowering its production cost, and also reducing the weight of the battery device 100. On the other hand, by setting the heat exchange component 30 to include a flexible structure, the heat exchange component 30 can fit better with the housing 20 and / or the battery cell assembly 10, thereby absorbing the assembly tolerances of the heat exchange component 30, eliminating the need for sealant or thermally conductive materials, improving the fit between the heat exchange component 30 and the housing 20 and / or the battery cell assembly 10, increasing the effective heat exchange area between the heat exchange component 30 and the housing 20 and / or the battery cell assembly 10, and thus improving the heat exchange efficiency and heat exchange effect of the heat exchange component 30.

[0118] In some embodiments, at least one heat exchanger is configured as a rigid member 32, and a flexible member 31 is stacked with the rigid member 32 to form a medium flow channel 312.

[0119] The rigid component 32 is a rigid plate structure that can support the flexible component 31, thereby improving the overall structural strength and stability of the heat exchange assembly 30.

[0120] Here, the rigidity of the rigid member 32 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 modulus of elasticity. As an example, the material of the rigid member 32 can be selected from materials similar to conventional aluminum plates, steel plates, etc., and its rigidity can be controlled by the thickness, width, length, and type of material of the rigid member 32. In this embodiment of the disclosure, by setting at least one heat exchanger of the heat exchange assembly 30 in the form of a rigid member 32, it is beneficial to provide support for the flexible member 31.

[0121] For example, there are two heat exchange components, one of which is a flexible component 31 and the other is a rigid component 32. The flexible component 31 and the rigid component 32 are stacked to form a medium flow channel 312.

[0122] For example, the rigid member 32 can also be stamped or welded with specific structures as needed for support or other functions.

[0123] For example, the heat exchange assembly 30 also includes an inlet and an outlet, both of which are connected to the medium flow channel 312.

[0124] Here, the inlet and outlet of the heat exchange component 30 are used to connect to the air conditioning system of the vehicle or electrical device or liquid storage device such as a water tank.

[0125] For example, the heat exchange assembly 30 also includes a connector 34 having an inlet and a connector 34 having an outlet, the connector 34 being connected to the rigid member 32.

[0126] For example, the connector 34 is brazed to the rigid member 32.

[0127] Here, "at least one heat exchanger is configured as a rigid element 32" means that there may be one or more heat exchangers configured as rigid elements 32. In embodiments where multiple heat exchangers are configured as rigid elements 32, the rigid elements 32 may be the same or different.

[0128] Here, by setting at least one heat exchanger as a rigid member 32, the rigid member 32 can support the flexible member 31, which is beneficial to improving the structural strength and stability of the heat exchange assembly 30, and further improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly 30.

[0129] It should be noted that the specific location of the heat exchange component 30 is not restricted here.

[0130] Exemplary examples, in some embodiments, refer to Figure 2 The housing 20 and the heat exchange component 30 are arranged to form a receiving cavity 23, and the battery cell assembly 10 is disposed in the receiving cavity 23.

[0131] Here, the flexible member 31 can be disposed on the side of the rigid member 32 facing the battery cell assembly 10, or it can be disposed on the side of the rigid member 32 away from the battery cell assembly 10.

[0132] In other words, the heat exchange component 30 constitutes part of the cavity wall of the receiving cavity 23. This helps to reduce the material used in the housing 20, further reducing the weight of the heat exchange component 30 and lowering costs. In addition, it allows the heat exchange component 30 to directly contact the battery cell assembly 10, thereby further improving the heat exchange efficiency between the heat exchange component 30 and the battery cell assembly 10.

[0133] For example, the rigid member 32 is connected to the housing 20 by welding or screwing.

[0134] In other embodiments, the heat exchange component 30 may be disposed inside the housing 20, that is, it may be in direct contact with the battery cell assembly 10. Alternatively, it may be disposed outside the housing 20, that is, the housing 20 is provided with a receiving cavity 23, and the heat exchange component 30 is disposed outside the receiving cavity 23, transferring heat through an intermediate medium, thereby realizing heat exchange between the heat exchange component 30 and the battery cell assembly 10.

[0135] That is, at least some of the heat exchange components 30 are located on the outside of the housing 20 to separate the heat exchange components 30 from the battery cell assembly 10.

[0136] The housing 20 is used to house the battery cell assembly 10, and the housing 20 can have various structures. In some embodiments, please refer again... Figure 2 The housing 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. The first housing portion 211, the second housing portion 212 and the heat exchange assembly 30 together define a receiving space for accommodating the battery cell assembly 10.

[0137] For example, the second housing portion 212 may be a frame structure with openings at both ends, the first housing portion 211 is a plate-like structure, the first housing portion 211 covers the opening at one end of the second housing portion 212, and the heat exchange assembly 30 is disposed at the opening at the other end of the second housing portion 212 to form a receiving cavity 23.

[0138] The first box section 211 and the second box section 212 can both be hollow structures with an opening on one side. The opening side of the first box section 211 covers the opening side of the second box section 212 to form a box body 21 with a accommodating space. Of course, the first box section 211 and the second box section 212 can be various shapes, such as cylinders, cuboids, etc.

[0139] 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.

[0140] 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.

[0141] For example, please refer again Figure 2 The battery assembly 100 also includes a bottom protective plate 22, which is disposed on the side of the heat exchange assembly 30 away from the battery cell assembly 10.

[0142] Here, by setting the bottom guard plate 22 on the side of the heat exchange assembly 30 away from the battery cell assembly 10, it can be used to protect the heat exchange assembly 30 and the housing 20, reduce the impact of external debris on the housing 20 during driving, and improve the reliability of the battery device 100.

[0143] In some implementations, please refer to Figures 6 to 7The flexible component 31 and the rigid component 32 are hot-pressed to form a hot-pressed region 311 and a medium flow channel 312. The flexible component 31 and the rigid component 32 are connected to each other in at least a part of the hot-pressed region 311.

[0144] In other words, the flexible part 31 and the rigid part 32 are connected by hot pressing, and the hot pressing forms a hot pressing area 311 and a medium flow channel 312. The flow channel area is used to guide the medium flow channel 312. This molding method is simple.

[0145] Here, the flexible component 31 is sealed by hot pressing. The hot pressing process can effectively ensure that the heat exchange component 30 has good sealing performance and is not easy to crack.

[0146] In this embodiment, the flexible component 31 is sealed by a hot pressing process, that is, a hot pressing region 311 is formed by hot pressing. The hot pressing region 311 divides the heat exchange component 30 to form at least one medium flow channel 312. This molding method is simple.

[0147] For example, the hot-pressing region 311 includes a heat-sealed region and a non-heat-sealed region. The non-heat-sealed region and the medium flow channel 312 are located on both sides of the heat-sealed region, which helps to reduce the width of the heat-sealed region and improve the problem of excessive temperature caused by an excessively wide heat-sealed region, which affects the hot-pressing quality and damages the flexible component 31. In addition, the non-heat-sealed region can also form a stress-relieving buffer when the flexible component 31 is folded, which improves the situation where stress concentration occurs in the heat-sealed region and causes damage to the heat-sealed region.

[0148] In related technologies, heat exchange components are formed by welding high-strength aluminum alloys. However, high-strength aluminum alloys (5 series, 6 series, etc.) have a high alloy content, and alloying elements will precipitate during welding, affecting the welding quality.

[0149] In this embodiment, the heat exchange component 30 is configured to include a flexible component 31 and a rigid component 32. The flexible component 31 and the rigid component 32 are hot-pressed to form a hot-pressed region 311 and a medium flow channel 312. The hot-pressing temperature (150℃±10℃) is lower than the brazing temperature in related technologies, so alloy elements will not precipitate, which is beneficial to further improve the structural strength of the heat exchange component 30.

[0150] In some implementations, please refer to Figure 2 and Figure 7 The heat exchange assembly 30 also includes a support member 33, which is disposed in the hot pressing area 311 and located on the side of the flexible member 31 away from the rigid member 32.

[0151] It should be noted that the specific number of support components 33 is not limited here. It can be a single unit or multiple components.

[0152] The support member 33 is disposed in the hot pressing area 311, that is, the support member 33 supports the flexible member 31 by abutting against the hot pressing area 311.

[0153] In this embodiment, by setting a support member 33 and placing the support member 33 in the hot pressing area 311, it can be used to support the flexible member 31, thereby improving the stability of the flexible member 31.

[0154] For example, the support member 33 is disposed on the side of the flexible member 31 away from the rigid member 32, so that the flexible member 31 can be abutted against the rigid member 32 by the bottom guard plate 22 abutting against the support member 33.

[0155] For example, the support 33 may be a protective or insulating material such as foam.

[0156] It should be noted that the specific connection method of the support member 33 is not limited here.

[0157] In some implementations, please refer to Figure 2 and Figure 7 The heat exchange assembly 30 also includes an adhesive layer, through which the support 33 and the flexible member 31 are bonded.

[0158] Here, the adhesive layer is formed, for example, by double-sided tape or self-adhesive tape bonded between the support member 33 and the flexible member 31.

[0159] In this embodiment, the support member 33 and the flexible member 31 are bonded together by an adhesive layer, which is a simple connection method.

[0160] In other embodiments, the support member 33 may be bonded or welded to the bottom protective plate 22 via an adhesive layer, or the support member 33 may be an integral structure with the bottom protective plate 22.

[0161] In some implementations, please refer to Figures 2 to 4 The flexible component 31 is configured as a metal plastic film.

[0162] The flexible component 31 is a single-layer or multi-layer thin film.

[0163] Here, the metal plastic film is a metal-plastic composite material, which includes a metal layer and a plastic layer.

[0164] In this embodiment, because the metal plasticized film is thin and lightweight, and because a medium flow channel 312 is formed between the metal plasticized film and the heat exchanger, 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 heat exchange assembly 30 has insulating properties, the risk of insulation failure can be reduced. This also 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.

[0165] For example, the flexible element 31 is configured as an aluminum-plastic film.

[0166] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0167] In some embodiments, the flexible member 31 has a layered structure, and the flexible member 31 includes a metal layer and a non-metal layer, which are stacked sequentially.

[0168] Here, the flexible component 31 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.

[0169] For example, the metal layer and the non-metal layer can be formed by hot pressing or hot melting.

[0170] Here, there is no limit to the number of metal layers and non-metal layers.

[0171] In this embodiment, the flexible element 31, which is composed of sequentially stacked metal and non-metal layers, is thin and lightweight. Furthermore, by forming a medium flow channel 312 between at least two flexible elements 31, 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.

[0172] In some embodiments, the flexible member 31 has a layered structure, including a metal layer and a non-metal layer, which are stacked sequentially, wherein the non-metal layer is disposed on the side of the metal layer facing the rigid member 32.

[0173] In other words, the non-metallic layer is located between the metallic layer and the rigid component 32.

[0174] Here, by placing a non-metallic layer on the side of the metal layer facing the rigid member 32, the non-metallic layer can be thermally pressed to connect with the rigid member 32.

[0175] In some embodiments, the metal layer includes one or more of aluminum foil, copper foil, and steel foil.

[0176] By setting the metal layer to one or more of aluminum foil, copper foil, and steel foil, the flexible component 31 can have a certain structural strength and can play an isolation role.

[0177] In some embodiments, the non-metallic layer includes one or more of polypropylene, polyvinyl chloride, and polyethylene.

[0178] By setting the non-metallic layer to one or more of polypropylene, polyvinyl chloride and polyethylene, the flexible component 31 can have a certain waterproof function.

[0179] 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.

[0180] In some embodiments, the non-metallic layer is a hot-melt layer.

[0181] 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.

[0182] In some embodiments, the flexible member 31 has a layered structure and includes a corrosion-resistant layer 313, an isolation layer 314 and a waterproof layer 315 arranged sequentially. The waterproof layer 315 is closer to the medium flow channel 312 than the corrosion-resistant layer 313.

[0183] Here, the corrosion-resistant layer 313 can be a nylon layer made of nylon material, thus having certain corrosion resistance, such as resistance to acid and alkali corrosion.

[0184] The isolation layer 314 can be a metal layer, which can be one or more of aluminum foil, copper foil and steel foil, so that the flexible part 31 has a certain structural strength and can play an isolation role.

[0185] The waterproof layer 315 can be a non-metallic layer, which can be one or more of polypropylene, polyvinyl chloride and polyethylene, so that the flexible part 31 can have a certain waterproof function.

[0186] In this embodiment, by configuring the flexible component 31 to include a corrosion-resistant layer 313, an isolation layer 314, and a waterproof layer 315 arranged sequentially, the waterproof layer 315 is closer to the medium flow channel 312 than the corrosion-resistant layer 313, which is beneficial to improving the reliability of the heat exchange component 30.

[0187] In some embodiments, the thickness of the isolation layer 314 is 6.5 μm-100 μm.

[0188] The thickness of the isolation layer 314 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.

[0189] In this embodiment, by setting the thickness of the isolation layer 314 to 6.5μm-100μm, the flexible component 31 can have a certain structural strength and flexibility.

[0190] In some embodiments, the thickness of the isolation layer 314 is 6.5 μm-15 μm.

[0191] The thickness of the isolation layer 314 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.

[0192] In this embodiment, by setting the thickness of the isolation layer 314 to 6.5μm-15μm, the flexible component 31 can be further made to have a certain structural strength and flexibility.

[0193] In some embodiments, the thickness of the corrosion-resistant layer 313 is 5 μm-20 μm.

[0194] The thickness of the corrosion-resistant layer 313 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, 1 Point values ​​of any one of the following: 1.8μm, 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.

[0195] In this embodiment, by setting the thickness of the corrosion-resistant layer 313 to 5μm-20μm, the wear resistance and toughness of the flexible part 31 can be improved.

[0196] In some embodiments, the thickness of the waterproof layer 315 is 50μm-120μm.

[0197] The thickness of the waterproof layer 315 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.

[0198] In this embodiment, by setting the thickness of the waterproof layer 315 to 50μm-120μm, the waterproof layer 315 can have a certain structural strength, improve waterproof performance, and facilitate the hot pressing connection of the flexible component 31 through the waterproof layer 315.

[0199] In some embodiments, please refer to Figures 2 to 4 The thickness of the flexible component 31 is 0.05mm-0.3mm.

[0200] 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.

[0201] In this embodiment, by setting the thickness of the flexible element 31 to 0.05mm-0.3mm, the heat exchange component 30 made of the flexible element 31 has a certain structural strength while the overall thickness of the heat exchange component 30 is small, which is beneficial to reduce the overall volume and weight of the battery device 100 and increase the energy density of the battery device 100.

[0202] In some embodiments, please refer to Figures 2 to 4 The thickness of the flexible component 31 is 0.08mm-0.2mm.

[0203] 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.

[0204] In this embodiment, by setting the thickness of the flexible element 31 to 0.08mm-0.2mm, the heat exchange component 30 made of the flexible element 31 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.

[0205] In some embodiments, the elastic modulus of the flexible member 31 is 0.1 MPa-10000 MPa.

[0206] For example, the elastic modulus of the flexible component 31 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.

[0207] 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.

[0208] In this embodiment, by setting the elastic modulus of the flexible component 31 to 0.1MPa-10000MPa, the flexible component 31 is made to have a certain structural strength, which improves the reliability of the heat exchange assembly 30, and also has a certain deformation capability. This can improve the fit between the heat exchange assembly 30 and the housing 20 and / or the battery module battery cell assembly 10, thereby increasing the effective heat exchange area between the heat exchange assembly 30 and the housing 20 and / or the battery module battery cell assembly 10, and thus improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly 30.

[0209] It should be noted that the specific material of rigid component 32 is not limited here.

[0210] In some embodiments, the rigid member 32 is a metal plate.

[0211] For example, it could be an aluminum alloy.

[0212] In this embodiment, by setting the rigid member 32 as a metal plate, the metal plate has both good structural strength and good thermal conductivity. In other words, while ensuring that the heat exchange component 30 has a certain heat exchange efficiency, the rigid member 32 can also provide a certain support for the flexible member 31.

[0213] In some implementations, please refer to Figure 2 and Figure 6The battery cell assembly 10 includes multiple battery cells 11, and the medium flow channel 312 includes multiple sub-flow channels. Each battery cell 11 corresponds to multiple sub-flow channels, and the extension direction of the sub-flow channel corresponding to the battery cell 11 is perpendicular to the length direction of the battery cell 11.

[0214] Multiple sub-channels are connected to form a medium flow channel 312.

[0215] The extension direction of the sub-channel is perpendicular to the length direction of the battery cell 11. In other words, multiple sub-channels are arranged along the length direction of the battery cell 11, so that the length direction of the battery cell 11 corresponds to multiple sub-channels.

[0216] It can be understood that the temperature of the heat exchange medium will gradually increase along the flow direction of the heat exchange medium. Therefore, by having each battery cell 11 correspond to multiple sub-channels, it is beneficial to improve the temperature uniformity of the battery cell 11.

[0217] In one specific embodiment, please refer to Figures 2 to 7 The battery device 100 includes a housing 20, a battery cell assembly 10, and a heat exchange assembly 30. The heat exchange assembly 30 is disposed at the bottom of the housing 20 and forms a receiving cavity 23 with the housing 20. The battery cell assembly 10 is disposed within the receiving cavity 23. The heat exchange assembly 30 includes a flexible member 31 and a rigid member 32, which are stacked and at least one medium flow channel 312 is formed between the flexible member 31 and the rigid member 32. The at least one medium flow channel 312 is used to conduct heat exchange medium for heat exchange with the battery cell assembly 10. The flexible member 31 and the rigid member 32 are hot-pressed to form a hot-pressed region 311 and a medium flow channel 312. The flexible member 31 and the rigid member 32 are interconnected in at least a portion of the hot-pressed region 311. The heat exchange assembly 30 also includes a support member 33, which is disposed in the hot-pressed region 311 and located on the side of the flexible member 31 opposite to the rigid member 32. The heat exchange assembly 30 also includes an adhesive layer, through which the support member 33 and the flexible member 31 are bonded. The battery device 100 also includes a bottom protective plate 22, which is disposed on the side of the heat exchange assembly 30 away from the battery cell assembly 10.

[0218] In one specific embodiment, the flexible component 31 has a layered structure, comprising a corrosion-resistant layer 313, an isolation layer 314, and a waterproof layer 315 sequentially disposed therefrom. The waterproof layer 315 is closer to the medium flow channel 312 than the corrosion-resistant layer 313. The thickness of the isolation layer 314 is 6.5μm-15μm. The thickness of the corrosion-resistant layer 313 is 5μm-20μm. The thickness of the waterproof layer 315 is 50μm-120μm. The thickness of the flexible component 31 is 0.05mm-0.3mm. The elastic modulus of the flexible component 31 is 0.1MPa-10000MPa.

[0219] 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.

[0220] 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 the elastic modulus is calculated by analyzing the relationship between the indentation depth and the load.

[0221] 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.

[0222] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A battery device, characterized in that, include: Box; A battery cell assembly, wherein the battery cell assembly is disposed within the housing; A heat exchange assembly includes at least two heat exchange elements, at least one of which is a flexible element. The at least two heat exchange elements are stacked and at least one medium flow channel is formed between the heat exchange elements. The at least one medium flow channel is used to conduct heat exchange medium, which is used to exchange heat with the battery cell assembly.

2. The battery device according to claim 1, characterized by At least one of the heat exchange components is configured as a rigid component, and the flexible component is stacked with the rigid component to form the medium flow channel.

3. The battery device of claim 1, wherein The housing and the heat exchange assembly form a receiving cavity, and the battery cell assembly is disposed within the receiving cavity.

4. The battery device of claim 2, wherein The flexible component and the rigid component are hot-pressed to form a hot-pressed region and a medium flow channel, and the flexible component and the rigid component are interconnected in at least a portion of the hot-pressed region.

5. The battery device of claim 4, wherein, The heat exchange assembly also includes a support member disposed in the hot-pressing area and located on the side of the flexible member away from the rigid member.

6. The battery device of claim 5, wherein, The heat exchange assembly also includes an adhesive layer, through which the support member and the flexible member are bonded.

7. The battery device according to any one of claims 1 to 6, wherein The flexible component is configured as a metal plastic film.

8. The battery device of claim 7, wherein, The flexible component is made of aluminum-plastic film.

9. The battery device according to any one of claims 1-6, characterized in that, The flexible component has a layered structure, comprising a metal layer and a non-metal layer, which are stacked sequentially.

10. The battery device of claim 9, wherein, The metal layer includes one or more of aluminum foil, copper foil, and steel foil.

11. The battery device of claim 9, wherein, The non-metallic layer includes one of polypropylene, polyvinyl chloride, and polyethylene.

12. The battery device of claim 9, wherein, The non-metallic layer is a hot-melt layer.

13. The battery device according to any one of claims 1 to 6, wherein The flexible component has a layered structure, comprising a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged sequentially, wherein the waterproof layer is closer to the medium flow channel than the corrosion-resistant layer.

14. The battery device according to claim 13, characterized in that, The thickness of the isolation layer is 6.5μm-100μm.

15. The battery device of claim 14, wherein, The thickness of the isolation layer is 6.5μm-15μm.

16. The battery device of claim 14, wherein, The thickness of the corrosion-resistant layer is 5μm-20μm.

17. The battery device of claim 14, wherein, The thickness of the waterproof layer is 50μm-120μm.

18. The battery device according to any one of claims 1 to 6, wherein The thickness of the flexible component is 0.05mm-0.3mm.

19. The battery device of claim 18, wherein, The thickness of the flexible component is 0.08mm-0.2mm.

20. The battery device of any one of claims 1-6, wherein, The elastic modulus of the flexible component is 0.1 MPa-10000 MPa.

21. The battery device of any one of claims 1-6, wherein, The battery device also includes a bottom protective plate, which is disposed on the side of the heat exchange assembly away from the battery cell assembly.

22. The battery device according to any one of claims 2, 4-6, wherein The rigid component is a metal plate.

23. The battery device according to any one of claims 1-6, characterized in that, The battery cell assembly includes multiple battery cells, and the medium flow channel includes multiple sub-flow channels. Each battery cell corresponds to multiple sub-flow channels, and the extension direction of the sub-flow channel corresponding to the battery cell is perpendicular to the length direction of the battery cell.

24. The battery device according to any one of claims 2, 4-6, wherein The flexible component has a layered structure, comprising a metal layer and a non-metal layer, which are stacked sequentially, wherein the non-metal layer is disposed on the side of the metal layer facing the rigid component.

25. A heat exchange assembly, comprising: The heat exchange component is the heat exchange component of the battery device according to any one of claims 1-24, and the heat exchange component is used to exchange heat with the battery cell assembly.

26. An energy storage device, comprising: Includes the battery device according to any one of claims 1-24 or the heat exchange assembly according to claim 25.

27. An electrical device, comprising: This includes the battery device according to any one of claims 1-24, the heat exchange component according to claim 25, or the energy storage device according to claim 26.

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