Heat exchange assembly, battery device and electric device

Abstract

Provided in the embodiments of the present disclosure are a heat exchange assembly, a battery device and an electric device. The battery device comprises a box, a heat exchange assembly and a plurality of battery cells, wherein the plurality of battery cells are arranged in the box; and the heat exchange assembly comprises a connector and at least two heat exchange members. At least one heat exchange member is configured as a flexible member, at least one heat exchange member is configured as a rigid member, and the elastic modulus of at least partial region of the flexible member is less than the elastic modulus of the rigid member. The flexible member and the rigid member are stacked to form at least one medium flow channel, the at least one medium flow channel is configured for the passing of a heat exchange medium, and the heat exchange medium is configured to exchange heat with the plurality of battery cells. The connector is provided with a connecting channel, the connector is connected to the rigid member, and the connecting channel is in communication with the medium flow channel. The rigid member is provided with a connection port, which is in communication with the medium flow channel, and the connector is arranged at the connection port and is connected to at least the side of the rigid member facing the flexible member.

Description

Heat exchange components, battery devices and electrical devices

[0001] Cross-reference to related applications

[0002] This disclosure is based on and claims priority to Chinese Patent Application No. 202510485892.7, filed on April 17, 2025, entitled “Heat Exchange Components, Battery Devices and Electrical Devices”, the entire contents of which are incorporated herein by reference. Technical Field

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

[0004] 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. Summary of the Invention

[0005] In view of this, the present disclosure aims to provide a heat exchange component, a battery device, and an electrical device that can reduce the weight of the heat exchange component to a certain extent.

[0006] Therefore, a first aspect of the present disclosure provides a battery device, comprising:

[0007] Box;

[0008] Multiple battery cells are housed inside the casing.

[0009] A heat exchange assembly includes a connector and at least two heat exchange elements, at least one heat exchange element being configured as a flexible element and at least one heat exchange element being configured as a rigid element, wherein the elastic modulus of at least a portion of the flexible element is less than the elastic modulus of the rigid element, and the flexible element and the rigid element are stacked to form at least one medium flow channel, the at least one medium flow channel being used to conduct heat exchange medium, and the heat exchange medium being used to exchange heat with multiple battery cells.

[0010] The connector has a connection channel, the connector is connected to the rigid component, and the connection channel is connected to the medium flow channel;

[0011] The rigid member has a connection port that communicates with the medium flow channel, and the connecting member is disposed at the connection port and is connected to at least the side of the rigid member facing the flexible member.

[0012] The battery device provided in this disclosure includes a housing, a heat exchange assembly, and multiple battery cells. The battery cells are disposed within the housing, which protects them. The heat exchange assembly exchanges heat with the battery cells. On one hand, by making at least one heat exchange component a flexible component, the lighter weight of the heat exchange assembly reduces its production cost and overall battery device weight. Furthermore, the flexibility of the flexible component allows for better fit between the heat exchange assembly and the housing and / or battery cells, 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 cells, increasing the effective heat exchange area, and ultimately enhancing the heat exchange efficiency and effect of the heat exchange assembly. On the other hand, by setting at least one heat exchanger as a rigid component and stacking flexible components with the rigid component to form at least one medium flow channel, the rigid component can support the flexible component, which helps to improve the overall structural strength and stability of the heat exchange assembly, further improving the heat exchange efficiency and heat exchange effect. Furthermore, by setting the rigid component, the heat exchange assembly has sufficient structural strength to support the battery cells, improving its applicability. On the other hand, by connecting the heat exchange assembly's connectors to the rigid component, the reliability and stability of the connector connection are improved. Moreover, by placing the connector at the connection port and connecting it at least to the side of the rigid component facing the flexible component, the flow of heat exchange medium within the medium flow channel to the sidewall of the connection port, which would otherwise corrode the sidewall, can be mitigated to some extent, thus improving the reliability of the heat exchange assembly. In addition, the number of anti-corrosion treatment steps for the sidewall of the connection port can be reduced, which helps to lower costs and improve production efficiency.

[0013] In some embodiments, the connector includes a connecting body and a flange, the flange being connected to the circumferential sidewall of the connecting body, the connecting body forming a connecting channel, at least a portion of the flange being disposed within the medium flow channel, and the flange being connected to the side of the rigid member facing the flexible member.

[0014] In this embodiment, by configuring the connector to include a connecting body and a flange, the flange is connected to the side of the rigid member facing the flexible member. This helps to increase the contact area between the connector and the rigid member, thereby further improving the connection reliability between the connector and the rigid member.

[0015] In some embodiments, the flange is welded to or glued to the rigid member.

[0016] This connection method is simple and reliable, and it can provide a certain degree of sealing between the connecting parts and the rigid parts.

[0017] In some embodiments, the heat exchange assembly further includes a seal sandwiched between the flange and the rigid member.

[0018] In this embodiment, by setting a seal and clamping the seal between the flange and the rigid member to seal the gap between the flange and the seal, the flow of heat exchange medium in the medium channel to the side wall of the connection port can be further improved, thus preventing the heat exchange medium from corroding the side wall of the connection port, thereby further improving the reliability of the heat exchange assembly.

[0019] In some embodiments, the flange is provided with a groove, and the seal is disposed within the groove.

[0020] The seal is sandwiched between the groove wall and the rigid component, which can reduce the possibility of misalignment or movement of the seal, thereby further improving the sealing performance between the connector and the rigid component.

[0021] In some embodiments, the heat exchange assembly includes a first anti-corrosion layer, and the rigid member is provided with the first anti-corrosion layer at least in the area forming the medium flow channel.

[0022] In this embodiment, by providing a first anti-corrosion layer in the area where at least the medium flow channel is formed on the rigid member, the first anti-corrosion layer can improve the situation where the heat exchange medium damages the rigid member, which is beneficial to improving the reliability of the heat exchange assembly.

[0023] In some embodiments, the side of the rigid component facing the flexible component is covered with a first anti-corrosion layer.

[0024] This can further improve the problem of heat exchange medium damaging rigid components and further improve the reliability of heat exchange components.

[0025] In some embodiments, the first anti-corrosion layer is a metal plastic film.

[0026] In this embodiment, because the metal plasticized film is thin and lightweight, and because a medium flow channel is formed between the metal plasticized film and the flexible component, 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 possibility of insulation failure can be reduced. This also reduces the possibility of a reaction between the rigid component and the internally flowing heat exchange medium, further reducing the possibility of heat exchange medium corrosion and leakage.

[0027] In some embodiments, the first anti-corrosion layer is an aluminum-plastic film.

[0028] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0029] In some embodiments, the first anti-corrosion layer comprises one or more of polypropylene, polyphenylene sulfide, polyphthalamide, and polyethylene; or,

[0030] The first anti-corrosion layer has a layered structure, and at least one layer of the first anti-corrosion layer close to the medium flow channel includes one or more of polypropylene, polyphenylene sulfide, polyphthalamide and polyethylene.

[0031] Here, polypropylene (PP), polyphenylene sulfide (PPS), polyphthalamide (PPA), or polyethylene (PE) have good corrosion resistance, which helps reduce the possibility of corrosion leakage of the heat exchange medium.

[0032] In some embodiments, the flexible element includes a metallized film.

[0033] 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 possibility of insulation failure can be reduced. This reduces the risk of the heat exchange assembly reacting with the internally flowing heat exchange medium, further reducing the possibility of heat exchange medium corrosion and leakage.

[0034] In some embodiments, the flexible element includes an aluminum-plastic film.

[0035] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0036] In some embodiments, the flexible element has a layered structure, comprising a metal layer and a non-metal layer, which are stacked sequentially.

[0037] 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 the flexible and rigid 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 possibility of corrosion and leakage.

[0038] In some embodiments, the metal layer includes one or more of aluminum foil, copper foil, and steel foil.

[0039] 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.

[0040] In some embodiments, the non-metallic layer includes one or more of polypropylene, polyphenylene sulfide, polyphthalamide, and polyethylene.

[0041] By setting the non-metallic layer to one or more of polypropylene, polyphenylene sulfide, polyphthalamide, and polyethylene, the flexible component can be made waterproof.

[0042] In some embodiments, the non-metallic layer is a hot-melt layer.

[0043] 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.

[0044] In some embodiments, the flexible element has a layered structure, comprising a first anti-corrosion layer, an isolation layer, and a second anti-corrosion layer arranged sequentially, wherein the first anti-corrosion layer is closer to the medium flow channel than the second anti-corrosion layer.

[0045] In this embodiment, by setting the flexible component to include a first anti-corrosion layer, an isolation layer and a second anti-corrosion layer arranged in sequence, the second anti-corrosion layer is closer to the medium flow channel than the first anti-corrosion layer, which is beneficial to improving the reliability of the heat exchange component.

[0046] In some embodiments, the thickness of the flexible element is 0.05mm-0.3mm.

[0047] 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.

[0048] In some embodiments, the thickness of the flexible element is 0.08mm-0.2mm.

[0049] 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.

[0050] In some embodiments, the elastic modulus of the flexible element is 0.1 MPa-10000 MPa.

[0051] 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 battery cells, thereby increasing the effective heat exchange area between the heat exchange assembly and the housing and / or battery cells, and thus improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly.

[0052] In some embodiments, the rigid element is a metal plate.

[0053] 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.

[0054] A second aspect of this disclosure provides a heat exchange assembly, which includes a connector and at least two heat exchange elements. At least one heat exchange element is configured as a flexible element and at least one heat exchange element is configured as a rigid element. The elastic modulus of at least a portion of the flexible element is less than the elastic modulus of the rigid element. The flexible element and the rigid element are stacked to form at least one medium flow channel. The at least one medium flow channel is used to conduct heat exchange medium, and the heat exchange medium is used to exchange heat with multiple battery cells.

[0055] The connector has a connection channel, the connector is connected to the rigid component, and the connection channel is connected to the medium flow channel;

[0056] The rigid member has a connection port that communicates with the medium flow channel, and the connecting member is disposed at the connection port and is connected to at least the side of the rigid member facing the flexible member.

[0057] The heat exchange assembly provided in this disclosure is used for heat exchange with battery cells. On one hand, by setting at least one heat exchange element as a flexible element, the lighter weight of the heat exchange assembly reduces its production cost and the overall weight of the battery device. Furthermore, the flexibility of the flexible element allows for better fit between the heat exchange assembly and the housing and / or battery cells, thus facilitating the absorption of assembly tolerances and eliminating the need for sealants or thermally conductive materials. This improves the fit between the heat exchange assembly and the housing and / or battery cells, increasing the effective heat exchange area and thereby enhancing the heat exchange efficiency and effect. On the other hand, by setting at least one heat exchange element as a rigid element, with the flexible and rigid elements stacked to form at least one medium flow channel, the rigid element provides support for the flexible element, improving the overall structural strength and stability of the heat exchange assembly and further enhancing its heat exchange efficiency and effect. Additionally, the rigid element provides sufficient structural strength to support the battery cells, improving the applicability of the heat exchange assembly. On the other hand, connecting the heat exchanger assembly's connectors to the rigid components improves the reliability and stability of the connection. Furthermore, by placing the connectors at the connection port and at least connecting them to the side of the rigid component facing the flexible component, the flow of heat exchange medium within the medium channel to the sidewall of the connection port, which could otherwise corrode the sidewall, can be mitigated. This improves the reliability of the heat exchanger assembly. Additionally, it reduces the need for anti-corrosion treatment of the connection port sidewalls, thus lowering costs and increasing production efficiency.

[0058] A third aspect of this disclosure provides an electrical device, including the battery device described above or the heat exchange component described above.

[0059] The battery device of the electrical device provided in this disclosure includes a housing, a heat exchange assembly, and multiple battery cells. The multiple battery cells are disposed within the housing, and the housing protects the battery cells. The heat exchange assembly is used for heat exchange with the battery cells. On the one hand, by making at least one heat exchange component a flexible component, the lighter weight of the flexible component helps reduce the weight of the heat exchange assembly, thereby reducing the production cost of the heat exchange assembly and the weight of the battery device. In addition, the flexibility of the flexible component allows for better fit between the heat exchange assembly and the housing and / or battery cells, which 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 and / or battery cells, increasing the effective heat exchange area between the heat exchange assembly and the housing and / or battery cells, and thus improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly. On the other hand, by setting at least one heat exchanger as a rigid component and stacking flexible components with the rigid component to form at least one medium flow channel, the rigid component can support the flexible component, which helps to improve the overall structural strength and stability of the heat exchange assembly, further improving the heat exchange efficiency and heat exchange effect. Furthermore, by setting the rigid component, the heat exchange assembly has sufficient structural strength to support the battery cells, improving its applicability. On the other hand, by connecting the heat exchange assembly's connectors to the rigid component, the reliability and stability of the connector connection are improved. Moreover, by placing the connector at the connection port and connecting it at least to the side of the rigid component facing the flexible component, the flow of heat exchange medium within the medium flow channel to the sidewall of the connection port, which would otherwise corrode the sidewall, can be mitigated to some extent, thus improving the reliability of the heat exchange assembly. In addition, the number of anti-corrosion treatment steps for the sidewall of the connection port can be reduced, which helps to lower costs and improve production efficiency. Attached Figure Description

[0060] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of this disclosure;

[0061] Figure 2 is an exploded perspective view of a battery device provided in an embodiment of the present disclosure;

[0062] Figure 3 is a three-dimensional exploded view of the heat exchange component provided in the first embodiment of this disclosure;

[0063] Figure 4 is an exploded perspective view of a flexible component provided in an embodiment of this disclosure;

[0064] Figure 5 is a three-dimensional exploded view of the heat exchange component provided in the second embodiment of this disclosure;

[0065] Figure 6 is a schematic diagram of the structure of a heat exchange component provided in an embodiment of this disclosure;

[0066] Figure 7 is a schematic diagram of the connection structure between the rigid member and the connecting member provided in the first embodiment of this disclosure;

[0067] Figure 8 is a schematic diagram of the connection structure between the rigid component and the connecting component provided in the second embodiment of this disclosure;

[0068] Figure 9 is a cross-sectional view along the AA direction in Figure 8;

[0069] Figure 10 is a structural schematic diagram of a connector provided in an embodiment of this disclosure;

[0070] Figure 11 is a schematic diagram of the connection structure of the seal and the connector provided in an embodiment of this disclosure.

[0071] Explanation of reference numerals in the attached drawings: 10. 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. First anti-corrosion layer; 314. Isolation layer; 315. Second anti-corrosion layer; 316. Reinforcing part; 317. Flexible part; 32. Rigid component; 321. Connection port; 34. Connector; 341. Connecting body; 342. Flange; 343. Connecting channel; 344. Inlet; 345. Outlet; 346. Groove; 35. Sealing element; 100. Battery device; 200. Controller; 300. Motor; 1000. Vehicle. Detailed Implementation

[0072] Unless otherwise specified, all embodiments and optional embodiments of this disclosure can be combined to form new technical solutions.

[0073] Unless otherwise specified, all technical features and optional technical features of this disclosure can be combined to form new technical solutions.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0079] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0080] In some implementations, the electrode assembly is a stacked structure.

[0081] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0082] 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.

[0083] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0084] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0085] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0086] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0087] In some embodiments, the electrode assembly has tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] In some embodiments, energy storage devices include energy storage containers, energy storage cabinets, etc.

[0093] 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.

[0094] 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.

[0095] In view of this, to improve the corrosion problem of heat exchange components, this disclosure provides a battery device including a housing, a heat exchange component, and multiple battery cells. The multiple battery cells are disposed within the housing. The heat exchange component includes a connector and at least two heat exchange elements. At least one heat exchange element is configured as a flexible element, and at least one heat exchange element is configured as a rigid element. The elastic modulus of at least a portion of the flexible element is less than the elastic modulus of the rigid element. The flexible element and the rigid element are stacked to form at least one medium flow channel for conducting heat exchange medium, which exchanges heat with the multiple battery cells. The connector has a connection channel, is connected to the rigid element, and communicates with the medium flow channel. The rigid element has a connection port communicating with the medium flow channel, and the connector is disposed at the connection port and connected to at least the side of the rigid element facing the flexible element.

[0096] The battery device provided in this disclosure includes a housing, a heat exchange assembly, and multiple battery cells. The battery cells are disposed within the housing, which protects them. The heat exchange assembly exchanges heat with the battery cells. On one hand, by making at least one heat exchange component a flexible component, the lighter weight of the heat exchange assembly reduces its production cost and overall battery device weight. Furthermore, the flexibility of the flexible component allows for better fit between the heat exchange assembly and the housing and / or battery cells, 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 cells, increasing the effective heat exchange area, and ultimately enhancing the heat exchange efficiency and effect of the heat exchange assembly. On the other hand, by setting at least one heat exchanger as a rigid component and stacking flexible components with the rigid component to form at least one medium flow channel, the rigid component can support the flexible component, which helps to improve the overall structural strength and stability of the heat exchange assembly, further improving the heat exchange efficiency and heat exchange effect. Furthermore, by setting the rigid component, the heat exchange assembly has sufficient structural strength to support the battery cells, improving its applicability. On the other hand, by connecting the heat exchange assembly's connectors to the rigid component, the reliability and stability of the connector connection are improved. Moreover, by placing the connector at the connection port and connecting it at least to the side of the rigid component facing the flexible component, the flow of heat exchange medium within the medium flow channel to the sidewall of the connection port, which would otherwise corrode the sidewall, can be mitigated to some extent, thus improving the reliability of the heat exchange assembly. In addition, the number of anti-corrosion treatment steps for the sidewall of the connection port can be reduced, which helps to lower costs and improve production efficiency.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] Referring to Figure 2, to meet different power demands, the battery device 100 includes multiple battery cells 10, where each battery cell 10 is the smallest unit that makes up a battery module or battery pack. Multiple battery cells 10 can be connected in series, parallel, or in a mixed configuration, where some cells are connected in series and others in parallel. Multiple battery cells 10 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly is housed within the housing 20. Alternatively, the battery device 100 can also consist of multiple battery cells 10 first connected in series, parallel, or in a mixed configuration to form battery modules, which are then connected in series, parallel, or in a mixed configuration to form a whole, 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 the multiple battery cells 10. Each battery cell 10 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 10 can be cylindrical, flat, cuboid, or other shapes.

[0102] Referring to Figures 2 to 11, this disclosure provides a battery device 100, which includes a housing 20, a heat exchange assembly 30, and a plurality of battery cells 10. The plurality of battery cells 10 are disposed within the housing 20. The heat exchange assembly 30 includes a connector 34 and at least two heat exchange elements. At least one heat exchange element is configured as a flexible element 31, and at least one heat exchange element is configured as a rigid element 32. The elastic modulus of at least a portion of the flexible element 31 is less than the elastic modulus of the rigid element 32. The flexible element 31 and the rigid element 32 are stacked to form at least one medium flow channel 312, which is used to conduct a heat exchange medium for heat exchange with the plurality of battery cells 10. The connector 34 has a connecting channel 343, which is connected to the rigid element 32 and communicates with the medium flow channel 312.

[0103] In this disclosure, "multiple" refers to two or more items.

[0104] Please refer to Figure 2. The battery device 100 includes a housing 20 and a plurality of battery cells 10, with the plurality of battery cells 10 disposed inside the housing 20.

[0105] 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.

[0106] The housing 20 is used to encapsulate the battery cell 10. The housing 20 can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cell 10.

[0107] For example, the box 20 is typically a cuboid structure. The length and width directions of the box 20 are parallel to the horizontal plane, and the length direction of the box 20 is parallel to the longest side of its cuboid structure. The height direction of the box 20 is perpendicular to the ground. For example, as shown in Figure 2, the length direction of the box 20 is represented by X, the width direction by Y, and the height direction by Z.

[0108] Referring to Figures 3 to 11, this embodiment of the disclosure provides a heat exchange assembly 30, which includes a connector 34 and at least two heat exchange elements. At least one heat exchange element is configured as a flexible element 31, and at least one heat exchange element is configured as a rigid element 32. The elastic modulus of at least a portion of the flexible element 31 is less than the elastic modulus of the rigid element 32. The flexible element 31 and the rigid element 32 are stacked to form at least one medium flow channel 312, which is used to conduct a heat exchange medium for heat exchange with multiple battery cells 10. The connector 34 has a connection channel 343, which is connected to the rigid element 32 and communicates with the medium flow channel 312.

[0109] Here, the flexibility in the 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, elastic modulus, and elongation at break. As an example, the material of the 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 the flexible component 31. By setting the heat exchange assembly 30 to include the flexible component 31 in this embodiment, it is beneficial to reduce the weight of the heat exchange assembly 30.

[0110] Here, the rigidity of the rigid component 32 refers to the material properties of the structure. This type of property can be due to the large mass of the material, or it can be due to at least one of the following properties: thickness, stiffness, strength, elastic modulus, elongation at break, etc. As an example, the material of the rigid component 32 can be selected as a metal plate such as a conventional aluminum plate or steel plate, or a composite material, etc., and its rigidity can be controlled by the thickness, width, length, and type of material of the rigid component 32. By setting the heat exchange assembly 30 to include the rigid component 32, the flexible component 31 can be supported, which is beneficial to improving the overall structural strength and stability of the heat exchange assembly 30.

[0111] For example, at least a portion of the elastic modulus of the flexible member 31 is less than that of the rigid member 32.

[0112] Here, the elastic modulus of a portion of the flexible component 31 may be less than that of the rigid component 32, or the elastic modulus of the entire flexible component 31 may be less than that of the rigid component 32.

[0113] By configuring the heat exchange component 30 to include a flexible component 31 and a rigid component 32, the heat exchange component 30 can have a flexible function while also having a certain structural strength.

[0114] The flexible function of the heat exchange component 30 allows the heat exchange surface of the heat exchange component 30 to fit better with the battery cell 10, further improving the heat exchange efficiency and heat exchange effect of the heat exchange component 30.

[0115] The flexible element 31 and the rigid element 32 are stacked to form at least one medium flow channel 312. This means that the heat exchange assembly 30 forms the medium flow channel 312 between the flexible element 31 and the rigid element 32. In other words, the flexible element 31 constitutes at least a portion of the sidewall of the medium flow channel 312, and the rigid element 32 also constitutes at least a portion of the sidewall of the medium flow channel 312. The heat exchange medium flows within the medium flow channel 312 to achieve heat exchange with the battery cell 10.

[0116] It should be noted that the specific type of heat exchange medium is not limited here, as long as it can achieve a heat exchange effect on the battery cell 10, such as being gaseous or liquid. In this embodiment, a coolant is used as an example for description.

[0117] It should be noted that the specific number of medium flow channels 312 is not limited here. There can be one or more.

[0118] The heat exchange assembly 30 includes at least two heat exchange elements, that is, the number of heat exchange elements is multiple.

[0119] The phrase "at least one heat exchanger is configured as a flexible element 31" means that the number of flexible elements 31 is one or more. In embodiments where multiple heat exchangers are configured as flexible elements 31, the flexible elements 31 may be the same or different.

[0120] The phrase "at least one heat exchanger is a rigid member 32" means that the number of rigid members 32 is one or more. In embodiments where multiple heat exchangers are configured as rigid members 32, the rigid members 32 may be the same or different.

[0121] For example, the heat exchange assembly 30 includes two heat exchange elements, one of which is a flexible element 31 and the other is a rigid element 32.

[0122] For example, the rigid member 32 is a rigid plate structure that can support the flexible member 31, thereby improving the overall structural strength and stability of the heat exchange assembly 30.

[0123] For example, the rigid member 32 can also be stamped or welded to form a specific structure as needed for support or other functions.

[0124] As exemplarily, referring to Figures 7 to 11, the heat exchange assembly 30 also includes a connector 34 having a connection channel 343 for communication with the outside. Exemplarily, the connector 34 may be a pipeline for connection to an air conditioning system or a liquid storage device such as a water tank in a vehicle or electrical equipment.

[0125] Here, the connector 34 can be a metal part or a plastic part, etc., and the specific material is not limited here.

[0126] The connector 34 may include an inlet connector, an outlet connector, or both an inlet connector and an outlet connector.

[0127] For example, please refer to Figures 2 and 9. The liquid inlet connector includes a connecting channel 343 and an inlet 344 communicating with the connecting channel 343. The inlet 344 is connected to the medium flow channel 312 through the connecting channel 343.

[0128] For example, the liquid outlet connector includes a connection channel 343 and an outlet 345 communicating with the connection channel 343, the outlet 345 being connected to the medium flow channel 312 via the connection channel 343.

[0129] For example, connector 34 is a water tap.

[0130] The connector 34 is configured as a rigid structure, and for example, the elastic modulus of the connector 34 is greater than the elastic modulus of the flexible member 31.

[0131] Here, since both the connector 34 and the rigid member 32 are rigid structures, connecting the connector 34 and the rigid member 32 helps to improve the connection reliability and connection stability of the connector 34.

[0132] The principle of heat exchange component 30 for heat exchange of battery cell 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 344 of the heat exchange component 30. After the heat exchange medium exchanges heat with the battery cell 10, the heat exchange medium flows out through the outlet 345 of the heat exchange component 30, thus completing the heat exchange of the battery cell 10.

[0133] Here, the heat exchange component 30 can exchange heat with the battery cell 10 by either dissipating heat from the battery cell 10 or by heating the battery cell 10.

[0134] The principle of heat exchange component 30 for heat dissipation of battery cell 10 is as follows: the heat exchange medium output from the heat exchange medium source enters the medium flow channel 312 through the inlet 344 of the heat exchange component 30. After the heat exchange medium absorbs the heat generated by the battery cell 10 during operation, the heat exchange medium flows out through the outlet 345 of the heat exchange component 30, releasing the heat and completing the cooling and heat dissipation of the battery cell 10.

[0135] The principle of the heat exchange component 30 heating the battery cell 10 is as follows: the heat exchange medium output from the heat exchange medium source enters the medium flow channel 312 through the inlet 344 of the heat exchange component 30, and the heat exchange medium transfers heat to the battery cell 10. After heating the battery cell 10, the heat exchange medium flows out through the outlet 345 of the heat exchange component 30, thus completing the heating of the battery cell 10.

[0136] 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 10 or other components, so as to improve the fit between the heat exchange assembly 30 and the housing 20 and / or the battery cell 10, thereby increasing the effective heat exchange area between the heat exchange assembly 30 and the housing 20 and / or the battery cell 10, and thus improving the heat exchange efficiency.

[0137] 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.

[0138] It should be noted that the specific location of the heat exchange component 30 is not restricted here.

[0139] For example, in some embodiments, please refer to FIG2, the housing 20 and the heat exchange assembly 30 are arranged to form a receiving cavity 23, and the battery cell 10 is disposed in the receiving cavity 23.

[0140] In other words, the heat exchange component 30 forms the cavity wall of the receiving cavity 23. This helps to reduce the material used in the housing 20, and further helps to reduce the weight and cost of the battery device 100. In addition, it allows the heat exchange component 30 to directly contact the battery cell 10, further improving the heat exchange efficiency between the heat exchange component 30 and the battery cell 10.

[0141] For example, the heat exchange assembly 30 forms the bottom wall of the receiving cavity 23, and the battery cell 10 is supported on the heat exchange assembly 30.

[0142] Here, the flexible member 31 can be disposed on the side of the rigid member 32 facing the battery cell 10, or it can be disposed on the side of the rigid member 32 away from the battery cell 10.

[0143] For example, the rigid member 32 is connected to the housing 20 by welding or screwing.

[0144] In other embodiments, the heat exchange component 30 may be disposed inside the housing 20, meaning it can directly contact the battery cell 10. Alternatively, it may be disposed outside the housing 20, meaning the housing 20 has a receiving cavity 23, and the heat exchange component 30 is disposed outside the receiving cavity 23, transferring heat through an intermediate medium to achieve heat exchange between the heat exchange component 30 and the battery cell 10.

[0145] 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 cells 10.

[0146] The housing 20 is used to accommodate the battery cell 10, and the housing 20 can have various structures. In some embodiments, please continue to refer to FIG2, 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, and 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 10.

[0147] For example, the second housing portion 212 may be a frame structure with openings at both ends, the first housing portion 211 may be a plate structure, the first housing portion 211 may cover the opening at one end of the second housing portion 212, and the heat exchange assembly 30 may be disposed at the opening at the other end of the second housing portion 212 to form a receiving cavity 23.

[0148] 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 receiving space. Of course, the first box section 211 and the second box section 212 can be various shapes, such as cylinders, cuboids, etc.

[0149] To improve the sealing performance after the first housing part 211 and the second housing part 212 are connected, a sealing element 35, such as sealant or sealing ring, can also be provided between the first housing part 211 and the second housing part 212.

[0150] 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.

[0151] For example, referring to FIG2, the battery device 100 also includes a bottom cover plate 22, which is disposed on the side of the heat exchange assembly 30 away from the battery cell 10.

[0152] Here, by setting the bottom guard plate 22 on the side of the heat exchange assembly 30 away from the battery cell 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.

[0153] In some embodiments, as shown in Figures 5 and 6, 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, and the flexible member 31 and the rigid member 32 are interconnected in at least a portion of the hot-pressed region 311.

[0154] 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.

[0155] 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.

[0156] 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.

[0157] 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.

[0158] 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.

[0159] 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 alloying elements will not precipitate, which is beneficial to further improve the structural strength of the heat exchange component 30.

[0160] For example, at least one of the flexible member 31 and the rigid member 32 includes a corrosion-resistant layer.

[0161] The flexible component 31 may include an anti-corrosion layer, the rigid component 32 may include an anti-corrosion layer, or both the flexible component 31 and the rigid component 32 may include an anti-corrosion layer.

[0162] Here, by setting an anti-corrosion layer, the problem of corrosion of the heat exchange components 30 by heat exchange medium, external corrosive substances, etc. can be improved.

[0163] The battery device 100 provided in this embodiment includes a housing 20, a heat exchange assembly 30, and multiple battery cells 10. The multiple battery cells 10 are disposed within the housing 20, which protects the battery cells 10. The heat exchange assembly 30 is used to exchange heat with the battery cells 10. On the one hand, by setting at least one heat exchange element as a flexible element 31, the lightweight nature of the flexible element 31 helps to reduce the weight of the heat exchange assembly 30, thereby reducing its production cost and the overall weight of the battery device 100. Furthermore, the flexible element 31 has a certain degree of flexibility, which allows the heat exchange assembly 30 to fit better with the housing 20 and / or the battery cells 10. This helps to absorb assembly tolerances of the heat exchange assembly 30, eliminating the need for sealants or thermally conductive materials, improving the fit between the heat exchange assembly 30 and the housing 20 and / or the battery cells 10, increasing the effective heat exchange area between the heat exchange assembly 30 and the housing 20 and / or the battery cells 10, and thus improving the heat exchange efficiency and effect of the heat exchange assembly 30. On the other hand, by setting at least one heat exchanger as a rigid member 32, and stacking the flexible member 31 with the rigid member 32 to form at least one medium flow channel 312, the rigid member 32 can support the flexible member 31, which helps to improve the overall structural strength and stability of the heat exchange assembly 30, and further improves the heat exchange efficiency and heat exchange effect of the heat exchange assembly 30. In addition, by setting the rigid member 32, the heat exchange assembly 30 has sufficient structural strength to support the battery cell 10, which improves the applicability of the heat exchange assembly 30. Furthermore, by setting at least one of the flexible member 31 and the rigid member 32 to include an anti-corrosion layer, the anti-corrosion layer helps to improve the anti-corrosion performance of the heat exchange assembly 30, which helps to improve the problem of corrosion of the heat exchange assembly 30 by heat exchange medium, external corrosive substances, etc., thereby improving the reliability of the heat exchange assembly 30.

[0164] In some embodiments, please refer to FIG3, the rigid member 32 is formed with a connection port 321 communicating with the medium flow channel 312, and the connector 34 is disposed at the connection port 321 and is connected to at least the side of the rigid member 32 facing the flexible member 31.

[0165] For example, the rigid member 32 extends through the rigid member 32 along the thickness direction to form a connection port 321. The connection port 321 communicates with the medium flow channel 312 so that the connection channel 343 of the connector 34 provided at the connection port 321 communicates with the medium flow channel 312.

[0166] For example, the connection port 321 can be formed by stamping on the rigid member 32.

[0167] For example, when projected along the thickness direction of the rigid member 32 in the same plane, the projection of the connection port 321 is located within the projection range of the medium flow channel 312.

[0168] Here, the connector 34 can be connected only to the side of the rigid member 32 facing the flexible member 31, or it can be connected to the side wall of the connector 321, or it can be connected to the side of the rigid member 32 away from the flexible member 31.

[0169] Here, a portion of the connector 34 is located on the side of the rigid member 32 away from the flexible member 31, and a portion is located on the side of the rigid member 32 facing the flexible member 31. This allows the portion of the connector 34 located on the side of the rigid member 32 away from the flexible member 31 to be connected to the piping of the air conditioning system or water tank of the vehicle or electrical equipment, and the portion of the connector 34 located on the side of the rigid member 32 facing the flexible member 31 to be connected to the side of the rigid member 32 facing the flexible member 31.

[0170] It is understandable that the side wall of the rigid component 32 located at the connection port 321 may not have been treated with anti-corrosion measures. If the heat exchange medium comes into contact with the side wall of the connection port 321, it may cause the heat exchange medium to corrode the side wall of the connection port 321.

[0171] By connecting the connector 34 to the side of the rigid member 32 facing the flexible member 31, the flow of heat exchange medium in the medium flow channel 312 to the side wall of the connection port 321 can be improved to a certain extent, thus reducing the corrosion of the side wall of the connection port 321 caused by the heat exchange medium. This improves the reliability of the heat exchange assembly 30. In addition, it can reduce the number of anti-corrosion treatment steps for the side wall of the connection port 321, which is beneficial to reduce costs and improve production efficiency.

[0172] It should be noted that there are various ways to connect the connector 34 and the rigid member 32. For example, the connector 34 and the rigid member 32 can be connected by welding, such as brazing, or by adhesive bonding. This connection method is simple and reliable, and can provide a certain degree of sealing between the connector 34 and the rigid member 32.

[0173] Of course, other common connection methods are also possible.

[0174] In some embodiments, referring to Figures 7 and 9, the connector 34 includes a connecting body 341 and a flange 342. The flange 342 is connected to the circumferential sidewall of the connecting body 341. The connecting body 341 forms a connecting channel 343. At least a portion of the flange 342 is disposed within the medium flow channel 312. The flange 342 is connected to the side of the rigid member 32 facing the flexible member 31.

[0175] The connecting body 341 and the flange 342 can be a single integrated structure, which helps to reduce the number of parts and improve assembly efficiency. For example, the outer side wall of the connecting body 341 can protrude radially outward to form the flange 342.

[0176] The connecting body 341 and the flange 342 can also be a separate structure, with the flange 342 connected to the connecting body 341 by means of adhesive or welding.

[0177] Here, the flange 342 is located at the end of the connecting body 341 near the flexible member 31.

[0178] For example, the radial dimension of the flange 342 is larger than the radial dimension of the connecting body 341. This is beneficial in two ways: firstly, it increases the contact area between the flange 342 and the rigid member 32, thereby further improving the connection reliability between the connecting member 34 and the rigid member 32; secondly, it facilitates the connection of the connecting body 341 to the side of the rigid member 32 facing the flexible member 31 and the flange 342.

[0179] In this embodiment, by configuring the connector 34 to include a connecting body 341 and a flange 342, the flange 342 is connected to the side of the rigid member 32 facing the flexible member 31. This helps to increase the contact area between the connector 34 and the rigid member 32, thereby further improving the connection reliability between the connector 34 and the rigid member 32.

[0180] In some embodiments, as shown in Figures 7 to 9, the flange 342 is welded to or glued to the rigid member 32.

[0181] For example, the flange 342 is brazed to the rigid member 32.

[0182] This connection method is simple and reliable, and it can provide a certain degree of sealing between the connector 34 and the rigid component 32.

[0183] In some embodiments, referring to FIG11, the heat exchange assembly 30 further includes a seal 35 sandwiched between the flange 342 and the rigid member 32.

[0184] For example, the seal 35 can be configured as a sealing ring, which is disposed around the periphery of the connecting body 341.

[0185] For example, the sealing ring may be in contact with the side wall of the connecting body 341 or may not be in contact with the side wall of the connecting body 341.

[0186] In this embodiment, by providing a sealing element 35 and clamping the sealing element 35 between the flange 342 and the rigid member 32 to seal the gap between the flange 342 and the sealing element 35, the flow of heat exchange medium in the medium flow channel 312 to the side wall of the connection port 321, which would otherwise cause the heat exchange medium to corrode the side wall of the connection port 321, can be further improved, thereby further improving the reliability of the heat exchange assembly 30.

[0187] In some embodiments, please refer to Figures 10 and 11, the flange 342 is provided with a groove 346, and the seal 35 is disposed in the groove 346.

[0188] For example, the groove 346 is provided on the side of the flange 342 facing the rigid member 32.

[0189] The seal 35 is sandwiched between the groove wall of the groove 346 and the rigid member 32, which can reduce the possibility of misalignment or movement of the seal 35, thereby further improving the sealing performance between the connector 34 and the rigid member 32.

[0190] In some embodiments, please refer to FIG6, the flexible member 31 includes a reinforcing portion 316 and a flexible portion 317, wherein the elastic modulus of the flexible portion 317 is less than the elastic modulus of the reinforcing portion 316.

[0191] For example, the reinforcing part 316 is located at the dashed box of the flexible member 31. Of course, in different embodiments, the reinforcing part 316 can be formed at different positions of the flexible member 31 as needed.

[0192] The elastic modulus of the flexible portion 317 is less than that of the reinforcing portion 316, meaning that the flexible member 31 includes regions with different elastic moduli. Therefore, depending on requirements, a portion of the flexible member 31 can be designated as the reinforcing portion 316, so that the elastic modulus of that region is greater than that of the flexible portion 317. This allows the flexible member 31 to possess flexible functionality and reduce its weight while also improving the overall structural strength and stability of the flexible member 31.

[0193] Here, the elastic modulus of the reinforcing part 316 can be equal to the elastic modulus of the rigid part 32, less than the elastic modulus of the rigid part 32, or greater than the elastic modulus of the rigid part 32.

[0194] For example, the number of reinforcing parts 316 can be one or more.

[0195] For example, the number of flexible parts 317 can be one or more.

[0196] For example, there are multiple reinforcing parts 316, which are spaced apart and / or staggered, and flexible parts 317 are disposed between adjacent reinforcing parts 316, thereby improving the overall structural strength of the flexible part 31.

[0197] For example, at least a portion of the reinforcing part 316 extends along the length direction of the housing 20.

[0198] For example, at least a portion of the reinforcing part 316 extends along the width direction of the housing 20.

[0199] For example, a portion of the reinforcing portion 316 extends along the length direction of the housing 20, and the reinforcing portions 316 extending along the length direction of the housing 20 are spaced apart along the width direction of the housing 20, while another portion of the reinforcing portion 316 extends along the width direction of the housing 20.

[0200] In some embodiments, referring to FIG6, at least a portion of the reinforcement 316 is disposed at the edge of the flexible member 31.

[0201] In this way, the overall structural strength and stability of the flexible component 31 can be further improved.

[0202] For example, the rigid member 32 can be connected by a reinforcing part 316 provided on the edge of the flexible member 31.

[0203] In some embodiments, referring to FIG6, the flexible portion 317 is formed with at least a portion of the medium flow channel 312.

[0204] In other words, the flexible part 317 may have a portion of the medium flow channel 312 formed therein, and the reinforcing part 316 may also have a portion of the medium flow channel 312 formed therein. Alternatively, the medium flow channels 312 may all be formed in the flexible part 317.

[0205] Here, by forming at least a portion of the medium flow channel 312 in the flexible part 317, the flexibility of the flexible part 317 can make the heat exchange surface of the heat exchange assembly 30 contact the battery cell 10 better, thus providing better heat exchange capability.

[0206] It is understandable that there are many ways in which the elastic modulus of the flexible part 317 is less than that of the elastic modulus of the reinforcing part 316.

[0207] In some embodiments, the thickness of the flexible portion 317 is less than the thickness of the reinforcing portion 316.

[0208] In other words, the flexible part 31 can be thinned in the flexible part 317 so that the thickness of the flexible part 317 is less than the thickness of the reinforcing part 316, thereby making the elastic modulus of the flexible part 317 less than the elastic modulus of the reinforcing part 316. This manufacturing method is simple.

[0209] For example, the flexible member 31 has a layered structure. By setting the number of layers of the flexible member 31 in the flexible part 317 to be less than the number of layers of the flexible member 31 in the reinforcing part 316, the thickness of the flexible part 317 is less than the thickness of the reinforcing part 316.

[0210] In some embodiments, the flexible part 317 is made of a different material than the reinforcing part 316.

[0211] In other words, by setting the material of the flexible part 317 to be different from that of the reinforcing part 316, the elastic modulus of the flexible part 317 is made smaller than that of the reinforcing part 316.

[0212] In some embodiments, please refer to Figures 3 to 5, the heat exchange assembly 30 includes a first anti-corrosion layer 313, and the rigid member 32 is provided with the first anti-corrosion layer 313 in at least the area forming the medium flow channel 312.

[0213] In other words, the anti-corrosion layer includes the first anti-corrosion layer 313.

[0214] The rigid component 32 is provided with a first anti-corrosion layer 313 in the area that is in contact with the heat exchange medium. The first anti-corrosion layer 313 serves to separate the heat exchange medium from the rigid component 32, thereby improving the situation where the heat exchange medium damages the rigid component 32, that is, reducing the situation where the heat exchange medium corrodes and leaks.

[0215] Here, the first anti-corrosion layer 313 is, for example, a heat exchange medium resistant layer. In an embodiment where the heat exchange medium is water, the first anti-corrosion layer 313 may be a waterproof layer.

[0216] In this embodiment, by providing a first anti-corrosion layer 313 in the area where at least the medium flow channel 312 is formed on the rigid member 32, the first anti-corrosion layer 313 can improve the situation where the heat exchange medium damages the rigid member 32, which is beneficial to improving the reliability of the heat exchange assembly 30.

[0217] Here, the rigid member 32 may have the first anti-corrosion layer 313 provided only in the area forming the medium flow channel 312. Alternatively, the rigid member 32 may be covered with the first anti-corrosion layer 313 on both sides facing the flexible member 31. In this way, the problem of heat exchange medium damaging the rigid member 32 can be further improved, and the reliability of the heat exchange assembly 30 can be further improved.

[0218] In some embodiments, the first anti-corrosion layer 313 includes a metal plastic film.

[0219] The first anti-corrosion layer 313 is a single-layer or multi-layer thin film.

[0220] Here, the metal plastic film is a metal-plastic composite material, which includes a metal layer and a plastic layer.

[0221] 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 flexible component 31, 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 possibility of insulation failure can be reduced. This also reduces the possibility of the rigid component 32 reacting with the internally flowing heat exchange medium, further reducing the possibility of heat exchange medium corrosion and leakage.

[0222] In some embodiments, the first anti-corrosion layer 313 includes an aluminum-plastic film.

[0223] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0224] For example, the first anti-corrosion layer 313 includes one or more of polypropylene, polyphenylene sulfide, polyphthalamide, and polyethylene.

[0225] Here, polypropylene (PP), polyphenylene sulfide (PPS), polyphthalamide (PPA), or polyethylene (PE) have good corrosion resistance, which helps reduce the possibility of corrosion leakage of the heat exchange medium.

[0226] For example, the first anti-corrosion layer 313 has a layered structure, and at least one layer of the first anti-corrosion layer 313 near the medium flow channel 312 includes one or more of polypropylene, polyphenylene sulfide, polyphthalamide and polyethylene.

[0227] For example, the first anti-corrosion layer 313 is an anti-corrosion coating, which includes one or both of epoxy resin and polyester resin.

[0228] In some embodiments, the first anti-corrosion layer 313 is hot-pressed onto the rigid member 32.

[0229] This manufacturing method is simple, low-cost, and helps to improve the connection reliability between the first anti-corrosion layer 313 and the rigid component 32.

[0230] For example, the flexible component 31 is provided with a first anti-corrosion layer 313.

[0231] Here, the flexible member 31 may have a first anti-corrosion layer 313 provided in at least the area forming the medium flow channel 312, or the flexible member 31 may have the first anti-corrosion layer 313 covering the side facing the rigid member 32.

[0232] In some embodiments, referring to Figure 4, the anti-corrosion layer includes a second anti-corrosion layer 315.

[0233] Here, the second anti-corrosion layer 315 is disposed on the outside of the heat exchange component 30 to reduce the corrosion of the heat exchange component 30 by external corrosive substances.

[0234] For example, the second anti-corrosion layer 315 has good resistance to acid and alkali corrosion.

[0235] For example, a second anti-corrosion layer 315 is provided on the side of the rigid member 32 that is away from the flexible member 31.

[0236] In other words, a second anti-corrosion layer 315 is provided on the side of the rigid component 32 away from the medium flow channel 312, that is, on the outer side of the rigid component 32. The second anti-corrosion layer 315 can reduce the corrosion of the rigid component 32 by external corrosive substances, thereby improving the reliability of the heat exchange assembly 30.

[0237] For example, a second anti-corrosion layer 315 is provided on the side of the flexible member 31 that is away from the rigid member 32.

[0238] In other words, the flexible component 31 is provided with a second anti-corrosion layer 315 on the side opposite to the medium flow channel 312, that is, on the outer side of the flexible component 31. The second anti-corrosion layer 315 can reduce the corrosion of the flexible component 31 by external corrosive substances, thereby improving the reliability of the heat exchange assembly 30.

[0239] In some embodiments, a second anti-corrosion layer 315 is provided on the side of the heat exchange component 30. That is, the second anti-corrosion layer 315 covers the side of the heat exchange component 30.

[0240] Thus, on the one hand, the second anti-corrosion layer 315 can reduce the corrosion of the sides of the flexible component 31 and the rigid component 32 by external corrosive substances. On the other hand, it can also reduce the penetration of external corrosive substances from the connection between the flexible component 31 and the rigid component 32 into the gap between the flexible component 31 and the rigid component 32, thereby further improving the reliability of the heat exchange assembly 30.

[0241] In some embodiments, one of the flexible member 31 and the rigid member 32 forms a flange, which at least covers the side of the other member.

[0242] For example, the flexible member 31 forms a flange that at least covers the side of the rigid member 32.

[0243] The phrase "the flanged portion at least covers the side of the rigid member 32" means that the flanged portion may only cover the side of the rigid member 32, or it may cover part of the side wall of the rigid member 32 that is away from the flexible member 31.

[0244] For example, the rigid member 32 forms a flange that at least covers the side of the flexible member 31.

[0245] The phrase "the flanged portion at least covers the side of the flexible member 31" means that the flanged portion may only cover the side of the flexible member 31, or it may cover part of the side wall of the flexible member 31 that is away from the rigid member 32.

[0246] In this embodiment, by forming a flange and covering at least one of the sides of the other, it is further beneficial to reduce the penetration of external corrosive substances from the connection between the flexible member 31 and the rigid member 32 into the gap between the flexible member 31 and the rigid member 32, thereby further improving the reliability of the heat exchange assembly 30.

[0247] In some embodiments, the second anti-corrosion layer 315 comprises nylon.

[0248] Here, the second anti-corrosion layer 315 can be a nylon layer made of nylon material, thus having certain corrosion resistance, such as resistance to acid and alkali corrosion.

[0249] In some embodiments, the flexible element 31 includes a metallized film.

[0250] The flexible component 31 is a single-layer or multi-layer thin film.

[0251] Here, the metal plastic film is a metal-plastic composite material, which includes a metal layer and a plastic layer.

[0252] 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 possibility 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 possibility of heat exchange medium corrosion and leakage.

[0253] For example, the flexible component 31 includes an aluminum-plastic film.

[0254] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0255] 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.

[0256] 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.

[0257] For example, the metal layer and the non-metal layer can be formed by hot pressing or hot melting.

[0258] Here, there is no limit to the number of metal layers and non-metal layers.

[0259] In this embodiment, the flexible member 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 the flexible member 31 and the rigid member 32, 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 eliminating the possibility of corrosion and leakage.

[0260] 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.

[0261] In other words, the non-metallic layer is located between the metallic layer and the rigid component 32.

[0262] 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.

[0263] In some embodiments, the metal layer includes one or more of aluminum foil, copper foil, and steel foil.

[0264] 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.

[0265] In some embodiments, the non-metallic layer includes one or more of polypropylene, polyphenylene sulfide, polyphthalamide, and polyethylene.

[0266] By setting the non-metallic layer to one or more of polypropylene, polyphenylene sulfide, polyphthalamide and polyethylene, the flexible component 31 can have a certain waterproof function.

[0267] 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.

[0268] In some embodiments, the non-metallic layer is a hot-melt layer.

[0269] 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.

[0270] In some embodiments, please refer to Figures 3 and 4. The flexible member 31 has a layered structure. The flexible member 31 includes a first anti-corrosion layer 313, an isolation layer 314 and a second anti-corrosion layer 315 arranged in sequence. The first anti-corrosion layer 313 is closer to the medium flow channel 312 than the second anti-corrosion layer 315.

[0271] Here, the second anti-corrosion layer 315 can be a nylon layer made of nylon material, thus having certain corrosion resistance, such as resistance to acid and alkali corrosion.

[0272] 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.

[0273] The first anti-corrosion layer 313 can be a non-metallic layer, which can be one or more of polypropylene, polyphenylene sulfide, polyphthalamide and polyethylene, so that the flexible part 31 can have a certain waterproof function.

[0274] In this embodiment, by configuring the flexible component 31 to include a first anti-corrosion layer 313, an isolation layer 314 and a second anti-corrosion layer 315 arranged in sequence, the second anti-corrosion layer 315 is closer to the medium flow channel 312 than the first anti-corrosion layer 313, which is beneficial to improving the reliability of the heat exchange component 30.

[0275] In some embodiments, the thickness of the isolation layer 314 is 6.5 μm-100 μm.

[0276] 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.

[0277] 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.

[0278] In some embodiments, the thickness of the isolation layer 314 is 6.5 μm-15 μm.

[0279] 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.

[0280] 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.

[0281] In some embodiments, the thickness of the second anti-corrosion layer 315 is 5μm-20μm.

[0282] The thickness of the second anti-corrosion layer 315 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.

[0283] In this embodiment, by setting the thickness of the second anti-corrosion layer 315 to 5μm-20μm, the wear resistance and toughness of the flexible part 31 can be improved.

[0284] In some embodiments, the thickness of the first anti-corrosion layer 313 is 50μm-120μm.

[0285] The thickness of the first anti-corrosion layer 313 can be any one of 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 92μm, 95μm, 100μm, 105μm, 108μm, 110μm, 115μm, and 120μm, or any value between two of them.

[0286] In this embodiment, by setting the thickness of the first anti-corrosion layer 313 to 50μm-120μm, the first anti-corrosion layer 313 can have a certain structural strength, improve waterproof performance, and facilitate the hot-pressing connection of the flexible component 31 through the first anti-corrosion layer 313.

[0287] In some embodiments, the thickness of the flexible element 31 is 0.05mm-0.3mm.

[0288] 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.

[0289] 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.

[0290] In some embodiments, the thickness of the flexible element 31 is 0.08 mm to 0.2 mm.

[0291] 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.

[0292] 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.

[0293] In some embodiments, the elastic modulus of the flexible member 31 is 0.1 MPa-10000 MPa.

[0294] 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.

[0295] 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.

[0296] In this embodiment, by setting the elastic modulus of the flexible component 31 to 0.1MPa-10000MPa, the flexible component 31 has 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 cell 10, thereby increasing the effective heat exchange area between the heat exchange assembly 30 and the housing 20 and / or the battery cell 10, and thus improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly 30.

[0297] It should be noted that the specific material of rigid component 32 is not limited here.

[0298] In some embodiments, the rigid member 32 is a metal plate.

[0299] For example, it could be an aluminum alloy.

[0300] 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.

[0301] In some embodiments, the medium flow channel 312 includes multiple sub-flow channels, each battery cell 10 corresponds to multiple sub-flow channels, and the extension direction of the sub-flow channel corresponding to the battery cell 10 is perpendicular to the length direction of the battery cell 10.

[0302] Multiple sub-channels are connected to form a medium flow channel 312.

[0303] The extension direction of the sub-channel is perpendicular to the length direction of the battery cell 10. In other words, multiple sub-channels are arranged along the length direction of the battery cell 10, so that the length direction of the battery cell 10 corresponds to multiple sub-channels.

[0304] 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 corresponding each battery cell 10 with multiple sub-channels, it is beneficial to improve the temperature uniformity of the battery cell 10.

[0305] In one specific embodiment, referring to Figures 2 to 6, the battery includes a housing 20, a heat exchange assembly 30, and multiple battery cells 10. The multiple battery cells 10 are disposed within the housing 20. The heat exchange assembly 30 includes a connector 34 and at least two heat exchange elements, at least one of which is a flexible element 31 and at least one of which is a rigid element 32. The elastic modulus of at least a portion of the flexible element 31 is less than the elastic modulus of the rigid element 32. The flexible element 31 and the rigid element 32 are stacked to form at least one medium flow channel 312. The at least one medium flow channel 312 is used to conduct a heat exchange medium for heat exchange with the multiple battery cells 10. The flexible element 31 and the rigid element 32 are hot-pressed to form a hot-pressed region 311 and a medium flow channel 312, and the flexible element 31 and the rigid element 32 are interconnected in at least a portion of the hot-pressed region 311. The rigid member 32 has a connection port 321 that communicates with the medium flow channel 312. The connector 34 is disposed at the connection port 321. The connector 34 includes a connecting body 341 and a flange 342. The flange 342 is connected to the circumferential sidewall of the connecting body 341. The connecting body 341 forms a connecting channel 343. At least a portion of the flange 342 is disposed in the medium flow channel 312. The flange 342 is connected to the side of the rigid member 32 facing the flexible member 31.

[0306] In one specific embodiment, referring to Figures 3 and 4, the flexible component 31 has a layered structure, comprising a first anti-corrosion layer 313, an isolation layer 314, and a second anti-corrosion layer 315 sequentially disposed. The first anti-corrosion layer 313 is closer to the medium flow channel 312 than the second anti-corrosion layer 315. The thickness of the isolation layer 314 is 6.5 μm-15 μm. The thickness of the first anti-corrosion layer 313 is 5 μm-20 μm. The thickness of the second anti-corrosion layer 315 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.

[0307] 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.

[0308] 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.

[0309] 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.

[0310] 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

1. A battery device, comprising: Box; Multiple battery cells are disposed inside the housing; A heat exchange assembly includes a connector and at least two heat exchange elements, at least one of the heat exchange elements being a flexible element and at least one of the heat exchange elements being a rigid element. The elastic modulus of at least a portion of the flexible element is less than the elastic modulus of the rigid element. The flexible element and the rigid element are stacked to form at least one medium flow channel. The at least one medium flow channel is used to conduct heat exchange medium, and the heat exchange medium is used to exchange heat with the plurality of battery cells. The connector has a connection channel, the connector is connected to the rigid member, and the connection channel is in communication with the medium flow channel; The rigid member has a connection port communicating with the medium flow channel, and the connector is disposed at the connection port and is connected to at least the side of the rigid member facing the flexible member.

2. The battery device according to claim 1, wherein, The connector includes a connecting body and a flange. The flange is connected to the circumferential sidewall of the connecting body. The connecting body forms the connecting channel. At least a portion of the flange is disposed within the medium flow channel. The flange is connected to the side of the rigid member facing the flexible member.

3. The battery device according to claim 2, wherein, The flange is welded to or glued to the rigid component.

4. The battery device according to claim 2, wherein, The heat exchange assembly also includes a seal, which is sandwiched between the flange and the rigid member.

5. The battery device according to claim 4, wherein, The flange is provided with a groove, and the seal is disposed in the groove.

6. The battery device according to any one of claims 1 to 5, wherein, The heat exchange assembly includes a first anti-corrosion layer, and the rigid member is provided with the first anti-corrosion layer at least in the area forming the medium flow channel.

7. The battery device according to claim 6, wherein, The rigid component is covered with the first anti-corrosion layer on the side facing the flexible component.

8. The battery device according to claim 6 or 7, wherein, The first anti-corrosion layer includes a metal plastic film.

9. The battery device according to claim 8, wherein, The first anti-corrosion layer includes an aluminum-plastic film.

10. The battery device according to claim 6 or 7, wherein, The first anti-corrosion layer comprises one or more of polypropylene, polyphenylene sulfide, polyphthalamide, and polyethylene; or, The first anti-corrosion layer has a layered structure, and at least one layer of the first anti-corrosion layer near the medium flow channel includes one or more of polypropylene, polyphenylene sulfide, polyphthalamide and polyethylene.

11. The battery device according to any one of claims 1 to 10, wherein, The flexible component includes a metal plasticized film.

12. The battery device according to claim 11, wherein, The flexible component includes an aluminum-plastic film.

13. The battery device according to any one of claims 1 to 10, wherein, The flexible component has a layered structure, comprising a metal layer and a non-metal layer, which are stacked sequentially.

14. The battery device according to claim 13, wherein, The metal layer includes one or more of aluminum foil, copper foil, and steel foil; and / or, The non-metallic layer includes one or more of polypropylene, polyphenylene sulfide, polyphthalamide, and polyethylene.

15. The battery device according to claim 13 or 14, wherein, The non-metallic layer is a hot-melt layer.

16. The battery device according to any one of claims 1 to 5, wherein, The flexible component has a layered structure and includes a second anti-corrosion layer, an isolation layer, and a first anti-corrosion layer arranged sequentially. The first anti-corrosion layer is closer to the medium flow channel than the second anti-corrosion layer.

17. The battery device according to any one of claims 1 to 16, wherein, The thickness of the flexible component is 0.05mm-0.3mm.

18. The battery device according to claim 17, wherein, The thickness of the flexible component is 0.08mm-0.2mm.

19. The battery device according to any one of claims 1 to 18, wherein, The elastic modulus of the flexible component is 0.1 MPa-10000 MPa.

20. The battery device according to any one of claims 1 to 19, wherein, The rigid component is a metal plate.

21. A heat exchange assembly, the heat exchange assembly comprising a connector and at least two heat exchange elements, at least one of the heat exchange elements being configured as a flexible element and at least one of the heat exchange elements being configured as a rigid element, wherein the elastic modulus of at least a portion of the flexible element is less than the elastic modulus of the rigid element, the flexible element and the rigid element being stacked to form at least one medium flow channel, the at least one medium flow channel being used to conduct a heat exchange medium, the heat exchange medium being used to exchange heat with a plurality of battery cells; in, The connector has a connection channel, the connector is connected to the rigid member, and the connection channel communicates with the medium flow channel; The rigid member has a connection port communicating with the medium flow channel, and the connector is disposed at the connection port and is connected to at least the side of the rigid member facing the flexible member.

22. An electrical device comprising a battery device according to any one of claims 1 to 20 or a heat exchange assembly according to claim 21.

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