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

Abstract

The embodiment of the utility model provides a heat exchange assembly, a battery device, electric equipment and energy storage equipment. The battery device comprises a box body assembly, a battery monomer assembly and a heat exchange assembly, and the battery monomer assembly is arranged in the box body assembly. The heat exchange assembly is arranged in the box body assembly. The heat exchange assembly comprises at least two flexible parts, and the at least two flexible parts are arranged in a stacked mode. The at least two flexible parts form a hot pressing area and a flow channel area through hot pressing. Wherein the flow channel area is used for conducting a heat exchange medium so as to carry out heat exchange on the battery monomer assembly; the hot pressing area comprises a heat sealing area, and the at least two flexible parts are connected with each other in the heat sealing area. According to the battery device provided by the embodiment of the invention, the heat exchange efficiency and the heat exchange effect of the heat exchange assembly can be improved, the problems that the hot-pressing quality is influenced and the flexible part is damaged due to over-high temperature caused by over-wide heat sealing area can be improved, and the condition that the heat sealing area is damaged due to stress concentration generated in the heat sealing area is improved.

Description

Technical Field

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

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

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

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

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

[0006] Cabinet assembly;

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

[0008] A heat exchange assembly is provided in the box assembly; wherein the heat exchange assembly includes at least two flexible members, the at least two flexible members are stacked, and the at least two flexible members are formed into a hot pressing area and a flow channel area by hot pressing;

[0009] The flow channel area is used to conduct heat exchange medium to perform heat exchange on the battery monomer assembly; the hot pressing area includes a heat sealing area, and the at least two flexible parts are connected to each other in the heat sealing area.

[0010] The battery device provided by the embodiment of the present disclosure includes a housing assembly, a battery cell assembly and a heat exchange assembly. The battery cell assembly is arranged in the housing assembly, and the housing assembly plays a protective role for the battery cell assembly. The heat exchange assembly is used to exchange heat with the battery cell assembly. On the one hand, the heat exchange assembly is made of a flexible part, and the weight of the flexible part is relatively light, which is conducive to reducing the weight of the battery device, reducing the production cost of the heat exchange assembly, and improving the energy density of the battery device; on the other hand, by setting the flexible part as a flexible structure, the heat exchange assembly can be better fitted with the housing assembly and / or the battery cell assembly, thereby absorbing the assembly tolerance of the heat exchange assembly, eliminating the need for filler or thermal conductive material, improving the fit between the heat exchange assembly and the housing assembly and / or the battery cell assembly, and increasing the effective heat exchange area between the heat exchange assembly and the housing assembly and / or the battery cell assembly, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly. In addition, the flexible part is formed into a hot pressing area and a flow channel area by hot pressing. The flow channel area is used to conduct the heat exchange medium. This molding method is simple.

[0011] In some embodiments, the heat pressing area further includes a non-heat sealing area, and the non-heat sealing area and the flow channel area are respectively located on both sides of the heat sealing area.

[0012] The heat-pressing area is designed with a non-heat-sealable zone, with the non-heat-sealable zone and the flow channel zone located on either side of the heat-sealable zone. This helps reduce the width of the heat-sealable zone, thereby alleviating the problem of excessively wide heat-sealable zones leading to excessively high temperatures, which can affect heat-pressing quality and damage the flexible component. Furthermore, the non-heat-sealable zone creates a buffer zone for stress relief when the flexible component is folded, mitigating stress concentration in the heat-sealable zone that can lead to damage.

[0013] In some embodiments, the width of the heat-sealed area is 0.5 mm to 30 mm.

[0014] In this embodiment, by setting the width of the heat sealing area to 0.5mm-30mm, it is beneficial to improve the reliability of the flow channel area of the flexible part, increase the coverage of the flow channel area, and thus improve the heat exchange efficiency of the heat exchange component. At the same time, it can also improve the problem of excessive temperature caused by the heat sealing area being too wide, affecting the hot pressing quality and damaging the flexible part.

[0015] In some embodiments, the width of the heat-sealed area is 2 mm to 3 mm.

[0016] This embodiment is helpful to further improve the problem that the temperature is too high due to the heat sealing area being too wide, which affects the hot pressing quality and damages the flexible parts.

[0017] In some embodiments, the non-heat-sealable area includes a closed area, and the flow channel region surrounds the closed area.

[0018] In this embodiment, the flow channel area is surrounded by a closed area, that is, a closed area is formed between the flow channel areas, thereby controlling the width of the heat-sealed area. In other words, by setting the closed area, it is beneficial to improve the reliability of the heat-sealed area, and it can also improve the problem of excessive temperature caused by the heat-sealed area being too wide, affecting the hot pressing quality and damaging the flexible parts.

[0019] In some embodiments, the closed area includes a first sub-area, the first sub-area extends along a first direction, a size of the first sub-area in a second direction is D, 1mm≤D≤50mm, and the first direction is perpendicular to the second direction.

[0020] When D ≥ 1mm, it can separate adjacent heat-sealing areas, helping to improve the situation where the heat-sealing areas overlap, resulting in a larger heat-pressing width in that area. This, in turn, can alleviate the problem of excessively wide heat-sealing areas leading to excessively high temperatures, affecting heat-pressing quality and damaging flexible parts. When D ≤ 50mm, it helps to control the spacing between adjacent flow channel areas, thereby improving heat exchange efficiency and effects. Therefore, when 1mm ≤ D ≤ 50mm, both heat-pressing quality and heat exchange efficiency can be taken into account, making the heat exchange component more practical.

[0021] In some embodiments, the non-heat-sealable area further includes a second sub-area, the second sub-area extends along the second direction, and a size of the second sub-area in the first direction is D, 1 mm ≤ D ≤ 50 mm.

[0022] When D ≥ 1mm, it can separate adjacent heat-sealing areas, helping to improve the situation where the heat-sealing areas overlap, resulting in a larger heat-pressing width in that area. This, in turn, can alleviate the problem of excessively wide heat-sealing areas leading to excessively high temperatures, affecting heat-pressing quality and damaging flexible parts. When D ≤ 50mm, it helps to control the spacing between adjacent flow channel areas, thereby improving heat exchange efficiency and effects. Therefore, when 1mm ≤ D ≤ 50mm, both heat-pressing quality and heat exchange efficiency can be taken into account, making the heat exchange component more practical.

[0023] In some embodiments, at least part of the closed area is provided with an arc-shaped area at its end along the extension direction.

[0024] In this embodiment, by providing an arc-shaped area at the end of the closed area along the extension direction, on the one hand, it is helpful to improve the problem of overlap of the heat-sealed area at the end of the closed area. On the other hand, it can also avoid the problem of stress concentration caused by the right angle at the end of the closed area, thereby improving the problem of failure of the heat-sealed area due to stress concentration and improving the quality of hot pressing.

[0025] In some embodiments, the radius of the arc-shaped area is R, 4mm≤R≤30mm.

[0026] When R ≥ 4mm, it can separate adjacent heat-sealing areas, which helps to improve the situation where the heat-sealing areas overlap, resulting in a large hot pressing width in the area. This can further improve the problem of excessively high temperatures due to the wide heat-sealing areas, affecting the hot pressing quality and damaging the flexible parts. It can also further avoid the problem of stress concentration caused by the right angles at the ends of the closed areas, thereby improving the problem of heat-sealing area failure caused by stress concentration and improving the hot pressing quality. When R ≤ 30mm, it is beneficial to control the spacing between adjacent flow channel areas, thereby improving heat exchange efficiency and heat exchange effect. Therefore, when 4mm ≤ R ≤ 30mm, both hot pressing quality and heat exchange efficiency can be taken into account, and the practicality of the heat exchange component is more enhanced.

[0027] In some embodiments, 8 mm ≤ R ≤ 20 mm.

[0028] When 8mm≤R≤20mm, the hot pressing quality and heat exchange efficiency can be further improved, and the practicality of the heat exchange component is stronger.

[0029] In some embodiments, the closed area includes a main area and an arc area, the main area extends along a first direction, the arc area is provided at at least one end of the main area along the first direction, the size of the main area in the second direction is D, the radius of the arc area is R, R≥D / 2, and the first direction is perpendicular to the second direction.

[0030] In this embodiment, when R≥D / 2, adjacent heat-sealing areas can be separated, which is beneficial to improving the situation where the heat-sealing areas have a large hot pressing width due to overlap, thereby improving the problem of excessive temperature due to the heat-sealing areas being too wide, affecting the hot pressing quality and damaging the flexible parts. It can also avoid the problem of stress concentration due to the right angles at the ends of the closed areas, thereby improving the problem of failure of the heat-sealing areas due to stress concentration, and further improving the hot pressing quality.

[0031] In some embodiments, the main body region and the arc-shaped region are smoothly connected.

[0032] The smooth connection between the main body area and the arc area refers to a smooth transition between the main body area and the arc area through an arc, which further improves the problem of failure of the heat sealing area due to stress concentration and further improves the hot pressing quality.

[0033] In some embodiments, the central angle corresponding to the arc-shaped area is greater than or equal to 180°.

[0034] The central angle corresponding to the arc region is greater than or equal to 180°, that is, the area corresponding to the arc region is greater than or equal to a semicircle, which is conducive to further improving the problem of stress concentration.

[0035] In some embodiments, the at least two flexible members are configured as metal plasticized films.

[0036] In this embodiment, the thin and lightweight metal-plasticized films, combined with the flow channel region formed between at least two metal-plasticized films, are unaffected by the extrusion process and eliminate the need for high thickness requirements. This reduces the overall thickness and weight of the heat exchange assembly. Furthermore, the heat exchange assembly does not react with the heat exchange medium flowing within it, eliminating the risk of corrosion or leakage.

[0037] In some embodiments, the at least two flexible members are configured as aluminum-plastic films.

[0038] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0039] In some embodiments, the flexible member is a layered structure, and the flexible member includes a metal layer and a non-metal layer, and the metal layer and the non-metal layer are stacked in sequence.

[0040] In this embodiment, the flexible member, composed of a stack of metal and non-metal layers, is thin and lightweight. Furthermore, by forming a flow channel between at least two flexible members, the flow channel is unaffected by the extrusion process and eliminates the need for strict thickness requirements, thereby reducing the overall thickness and weight of the heat exchange assembly. Furthermore, the heat exchange assembly does not react with the heat exchange medium flowing within, eliminating the risk of corrosion or leakage.

[0041] In some embodiments, the metal layer includes one of aluminum foil, copper foil and steel foil.

[0042] The flexible part can have a certain structural strength and can play an isolation role.

[0043] In some embodiments, the non-metallic layer includes one of polypropylene, polyvinyl chloride, and polyethylene.

[0044] The flexible part can be made waterproof to a certain extent.

[0045] In some embodiments, the non-metallic layer is a hot-melt layer.

[0046] Here, by setting the non-metallic layer as a hot-melt layer, that is, composed of a hot-melt material, it is advantageous to combine the non-metallic layer and the metal layer through hot melting, which makes molding simple and the production efficiency high.

[0047] In some embodiments, the flexible member is a layered structure, and the flexible member includes a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged in sequence, and the waterproof layer is closer to the flow channel area than the corrosion-resistant layer.

[0048] In this embodiment, by configuring the flexible member to include a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged in sequence, the waterproof layer is closer to the flow channel area than the corrosion-resistant layer, which is beneficial to improving the reliability of the heat exchange component.

[0049] In some embodiments, the thickness of the isolation layer is 6.5 μm-100 μm.

[0050] In this embodiment, by setting the thickness of the isolation layer to 6.5 μm-100 μm, the flexible member can have a certain structural strength and flexibility.

[0051] In some embodiments, the thickness of the isolation layer is 6.5 μm-15 μm.

[0052] In this embodiment, by setting the thickness of the isolation layer to 6.5 μm-15 μm, the flexible member can further have a certain structural strength and flexibility.

[0053] In some embodiments, the corrosion-resistant layer has a thickness of 5 μm-20 μm.

[0054] In this embodiment, by setting the thickness of the corrosion-resistant layer to 5 μm-20 μm, the wear resistance and toughness of the flexible component can be improved.

[0055] In some embodiments, the waterproof layer has a thickness of 50 μm-120 μm.

[0056] In this embodiment, by setting the thickness of the waterproof layer to 50 μm-120 μm, the waterproof layer can have a certain structural strength, improve the waterproof performance, and facilitate hot pressing connection of the flexible parts through the waterproof layer.

[0057] In some embodiments, the thickness of the flexible member is 0.05 mm-0.3 mm.

[0058] By setting the thickness of the flexible part to 0.05mm-0.3mm, the heat exchange component made of the flexible part has a certain structural strength while the overall thickness of the heat exchange component is smaller, which is beneficial to reducing the overall volume and weight of the battery to increase the energy density of the battery.

[0059] In some embodiments, the thickness of the flexible member is 0.08 mm-0.2 mm.

[0060] By setting the thickness of the flexible part to 0.08mm-0.2mm, the heat exchange component made of the flexible part has a certain structural strength, while the overall thickness of the heat exchange component is further reduced, which is conducive to further reducing the overall volume and weight of the battery, thereby further increasing the energy density of the battery.

[0061] In some embodiments, the elastic modulus of the flexible member is 0.1 MPa-10000 MPa.

[0062] In this embodiment, by setting the elastic modulus of the flexible part to 0.1MPa-10000MPa, the flexible part can have a certain structural strength, thereby improving the reliability of the heat exchange component, and also have a certain deformation ability, which can improve the fit between the heat exchange component and the box component and / or the battery component battery cell component, thereby increasing the effective heat exchange area between the heat exchange component and the box component and / or the battery component battery cell component, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange component.

[0063] A second aspect of the embodiments of the present disclosure provides a heat exchange assembly, which is the heat exchange assembly of the battery device described above, and is used to exchange heat with the battery cell assembly.

[0064] The heat exchange assembly provided by the embodiment of the present disclosure is used to exchange heat with a battery cell assembly. On the one hand, the heat exchange assembly is made of a flexible part, which is relatively light in weight, which is beneficial to reducing the weight of the battery device, reducing the production cost of the heat exchange assembly, and improving the energy density of the battery device; on the other hand, by setting the flexible part as a flexible structure, the heat exchange assembly can be better fitted with the box assembly and / or the battery cell assembly, which is beneficial to absorbing the assembly tolerance of the heat exchange assembly, eliminating the need for fillers or thermally conductive materials, improving the fit between the heat exchange assembly and the box assembly and / or the battery cell assembly, and increasing the effective heat exchange area between the heat exchange assembly and the box assembly and / or the battery cell assembly, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly. In addition, the flexible part is formed into a hot pressing area and a flow channel area by hot pressing, and the flow channel area is used to conduct the heat exchange medium. This molding method is simple.

[0065] A third aspect of the embodiments of the present disclosure provides an electrical device, comprising the battery device or the heat exchange assembly described above.

[0066] The battery device of an electrical device provided in an embodiment of the present disclosure includes a housing assembly, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is disposed in a first accommodating cavity of the housing assembly, and the housing assembly protects the battery cell assembly. The heat exchange assembly is used to exchange heat with the battery cell assembly. On the one hand, the heat exchange assembly is made of a flexible member, which is lightweight, thereby reducing the weight of the battery device, reducing the production cost of the heat exchange assembly, and increasing the energy density of the battery device. On the other hand, by configuring the flexible member as a flexible structure, the heat exchange assembly can be better fitted to the housing assembly and / or the battery cell assembly, thereby absorbing the assembly tolerance of the heat exchange assembly, eliminating the need for caulking agent or thermally conductive material, improving the fit between the heat exchange assembly and the housing assembly and / or the battery cell assembly, and increasing the effective heat exchange area between the heat exchange assembly and the housing assembly and / or the battery cell assembly, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly. In addition, the flexible member is formed into a hot pressing area and a flow channel area by hot pressing. The flow channel area is used to conduct the heat exchange medium, and this molding method is simple.

[0067] A fourth aspect of the embodiments of the present disclosure provides an energy storage device, comprising the battery device or the heat exchange assembly described above.

[0068] The battery device of the energy storage device provided by the embodiment of the present disclosure includes a case assembly, a battery cell assembly and a heat exchange assembly. The battery cell assembly is arranged in the first accommodating cavity of the case assembly, and the case assembly plays a protective role for the battery cell assembly. The heat exchange assembly is used to exchange heat with the battery cell assembly. On the one hand, the heat exchange assembly is made of a flexible part. The flexible part is light in weight, which is conducive to reducing the weight of the battery device, reducing the production cost of the heat exchange assembly, and improving the energy density of the battery device; on the other hand, by setting the flexible part as a flexible structure, the heat exchange assembly can be better fitted with the case assembly and / or the battery cell assembly, thereby absorbing the assembly tolerance of the heat exchange assembly, eliminating the need for filler or thermal conductive material, improving the fit between the heat exchange assembly and the case assembly and / or the battery cell assembly, and increasing the effective heat exchange area between the heat exchange assembly and the case assembly and / or the battery cell assembly, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly. In addition, the flexible part is formed into a hot pressing area and a flow channel area by hot pressing. The flow channel area is used to conduct the heat exchange medium. This molding method is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 A schematic structural diagram of a vehicle provided in one embodiment of the present disclosure;

[0070] Figure 2 This is a perspective exploded schematic diagram of a battery device provided in one embodiment of the present disclosure, characterized in that the heat exchange component is disposed in the second accommodation cavity;

[0071] Figure 3 A cross-sectional view of a battery device according to an embodiment of the present disclosure;

[0072] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0073] Figure 5 A schematic diagram of the connection structure between the heat exchange assembly and the bottom guard plate provided in one embodiment of the present disclosure;

[0074] Figure 6 A schematic structural diagram of a heat exchange assembly provided in one embodiment of the present disclosure;

[0075] Figure 7 A schematic structural diagram of a bottom guard plate provided in one embodiment of the present disclosure;

[0076] Figure 8 A schematic structural diagram of a heat exchange assembly provided in another embodiment of the present disclosure;

[0077] Figure 9 for Figure 8 Enlarged view of point B in the middle.

[0078] Description of Reference Numerals

[0079] 10. Battery cell assembly; 11. Battery cell; 20. Box assembly; 21. Box body; 211. First box body portion; 212. Second box body portion; 22. Bottom guard plate; 221. Connecting portion; 222. Limiting structure; 23. First accommodating cavity; 24. Second accommodating cavity; 30. Heat exchange assembly; 31. Flexible part; 32. Flow channel area; 33. Avoidance hole; 34. Heat sealing area; 35. Inlet; 36. Outlet; 37. Non-heat sealing area; 38. Closed area; 381. First sub-area; 382. Second sub-area; 383. Main body area; 384. Arc area; 39. Open area; 100. Battery device; 200. Controller; 300. Motor; 1000. Vehicle. DETAILED DESCRIPTION

[0080] Unless otherwise specified, all embodiments and optional embodiments of the present disclosure can be combined with each other to form new technical solutions.

[0081] Unless otherwise specified, all technical features and optional technical features disclosed herein can be combined with each other to form a new technical solution.

[0082] With the development of clean energy, more and more devices are using electricity as a driving force. Consequently, power batteries, such as lithium-ion batteries, that can store large amounts of electricity and undergo multiple charge and discharge cycles are rapidly developing. These batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in aerospace and other fields.

[0083] In the embodiment of the present disclosure, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0084] The battery cells may be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present disclosure.

[0085] A battery cell typically includes an electrode assembly. This assembly includes a positive electrode, a negative electrode, and a separator, which is positioned between the positive and negative electrodes. During the charge and discharge process of a battery cell, active ions (such as lithium ions) are intercalated and released between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0086] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0087] In some embodiments, the electrode assembly is a laminate structure.

[0088] As an example, multiple positive electrode sheets and multiple negative electrode sheets can be provided respectively, and the multiple positive electrode sheets and the multiple negative electrode sheets can be alternately stacked.

[0089] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.

[0090] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of stacked folded segments.

[0091] As an example, a plurality of separators may be provided, each of which is disposed between any adjacent positive electrode sheets or negative electrode sheets.

[0092] As an example, the separator may be provided continuously, and may be provided between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0093] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0094] In some embodiments, the electrode assembly is provided with tabs that can conduct current from the electrode assembly. The tabs include a positive tab and a negative tab.

[0095] In some embodiments, the battery cell may include an outer shell. The outer shell may be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film. In some embodiments, the outer shell may be a sealed structure or a non-sealed structure. As an example, when the outer shell is a non-sealed structure, the outer shell serves to protect the electrode assembly, and a sealing bag is further included between the outer shell and the electrode assembly, which is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag may be a bag-shaped insulating member or an aluminum-plastic film. When the outer shell is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0096] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in the present disclosure.

[0097] In some embodiments, the housing includes an end cap and a shell, wherein the shell has an opening and the end cap covers the opening. The shell may have one or more openings. One or more end caps may also be provided.

[0098] In some embodiments, the housing is provided with at least one electrode terminal, which is electrically connected to the tab. The electrode terminal may be directly connected to the tab or indirectly connected to the tab via a current collecting member. The electrode terminal may be provided on an end cap or on the housing.

[0099] In some embodiments, the energy storage equipment includes an energy storage container, an energy storage cabinet, etc.

[0100] Power plants are increasingly demanding higher area energy density for energy storage containers. Consequently, to increase the amount of electricity they can hold, the weight of the containers is also increasing. However, containers must be transported from production sites to their intended destinations by land and / or sea, and these transport methods often have weight restrictions. This creates a conflict between the increased energy density and the weight of the energy storage containers.

[0101] During the use of the battery device, the battery cells in the battery device will generate heat. If this heat is too high, it will have an adverse effect on the performance and service life of the battery device. Therefore, how to effectively dissipate heat from the battery cells of the battery device has become an important research direction in this field. In the related art, a cooling system is provided in the battery device box to cool the battery cells in the battery device. The above-mentioned cooling system may include multiple aluminum water-cooling plates laid in the battery device box, and the surfaces of the multiple water-cooling plates are in contact with the surfaces of the battery cells in the battery device. During use, a heat exchange medium such as water flows through the above-mentioned multiple water-cooling plates, thereby removing heat from the battery cells and cooling the battery cells. However, when the aluminum water-cooling plates in the above-mentioned cooling system do not fit well with the surfaces of the battery cells in the battery device, the heat exchange efficiency and heat exchange effect are poor. At the same time, when assembling with the battery cell assembly, assembly tolerance compensation and filling of caulking agent are required, and the production cost is high. In addition, the water-cooling plate and battery device box have high rigidity and require the use of hard structural adhesive, which makes disassembly difficult. If self-adhesive, soft or double-sided adhesive is used, the rigidity of the water-cooling plate and battery device box is relatively good, and when there is a gap and flatness mismatch, there will be problems with debonding.

[0102] In view of this, in order to improve the heat exchange efficiency and heat exchange effect of the heat exchange assembly, an embodiment of the present disclosure provides a battery device, which includes a box assembly, a battery cell assembly and a heat exchange assembly. The battery cell assembly is arranged in the box assembly. The heat exchange assembly is arranged in the box assembly. Among them, the heat exchange assembly includes at least two flexible parts, and the at least two flexible parts are stacked. The at least two flexible parts include a heat sealing area, and the heat sealing area is constructed by hot pressing of at least two flexible parts. The heat sealing area separates the heat exchange assembly into a flow channel area and a non-heat sealing area. The flow channel area is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the battery cell assembly.

[0103] The battery device provided by the embodiment of the present disclosure includes a case assembly, a battery cell assembly and a heat exchange assembly. The battery cell assembly is arranged in the case assembly, and the case assembly plays a protective role for the battery cell assembly. The heat exchange assembly is used to exchange heat with the battery cell assembly. On the one hand, the heat exchange assembly is made of flexible parts, and the weight of the flexible parts is relatively light, which is conducive to reducing the weight of the battery device, reducing the production cost of the heat exchange assembly, and improving the energy density of the battery device; on the other hand, by setting the flexible parts as flexible structures, the flexible structures have a certain deformation ability, which can make the heat exchange assembly better fit and adapt to the case assembly and / or the battery cell assembly, thereby absorbing the assembly tolerance of the heat exchange assembly, improving the fit between the heat exchange assembly and the case assembly and / or the battery cell assembly, and increasing the effective heat exchange area between the heat exchange assembly and the case assembly and / or the battery cell assembly, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly.

[0104] Furthermore, the flexible component is sealed through a heat-pressing process, forming a heat-sealed area that separates the heat exchange component into a flow channel and a non-heat-sealed area. This simple molding method also reduces the width of the heat-sealed area, mitigating the problem of excessively wide heat-sealed areas leading to excessive temperatures, which can affect heat-pressing quality and damage the flexible component. Furthermore, the non-heat-sealed area also creates a buffer zone for stress relief when the flexible component is folded, mitigating stress concentration in the heat-sealed area that can lead to damage.

[0105] The technical solutions described in the embodiments of the present disclosure are applicable to electrical equipment using a battery device. The electrical equipment includes a battery device according to any embodiment of the present disclosure, and the battery device is used to provide electrical energy.

[0106] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and electric tools, etc. Vehicles can be fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting 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. The embodiments of the present disclosure do not impose any special restrictions on the above-mentioned electrical equipment.

[0107] It should be noted that the technical solutions described in the embodiments of the present disclosure are not limited to the battery devices and electrical equipment described above, but can also be applied to all battery devices including box assemblies and electrical equipment using battery devices. However, for the sake of simplicity, the following embodiments are described using electric vehicles as an example.

[0108] Please refer to Figure 1 , a controller 200, a motor 300 and a battery device 100 may be provided inside the vehicle 1000, and the controller 200 is used to control the battery device 100 to power the motor 300. For example, the battery device 100 may be provided at the bottom, front or rear of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000. For example, the battery device 100 may be used as an operating power source for the vehicle 1000, for the circuit system of the vehicle 1000, for example, for the working power requirements during the start-up, navigation and operation of the vehicle 1000. In another embodiment of the present disclosure, the battery device 100 may not only be used as an operating power source for the vehicle 1000, but may also be used as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0109] See also Figure 2 In order to meet different power requirements, the battery device 100 includes a battery cell assembly 10, which may include multiple battery cells 11. The battery cell 11 refers to the smallest unit that constitutes the battery device 100 module or battery device 100 pack. The multiple battery cells 11 can be connected in series, in parallel, or in a mixed connection. Mixed connection means that the multiple battery cells 11 are connected in both series and parallel. The multiple battery cells 11 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 11 is accommodated in the box assembly 20. Of course, the battery device 100 can also be a battery device 100 module in the form of multiple battery cells 11 first connected in series, in parallel, or in a mixed connection, and the multiple battery device 100 modules are then connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box assembly 20. The battery device 100 may also include other structures. For example, the battery device 100 may also include a busbar component for achieving electrical connection between the multiple battery cells 11. Each battery cell 11 may be a secondary battery device 100 or a primary battery device 100; it may also be a lithium-sulfur battery device 100, a sodium-ion battery device 100, or a magnesium-ion battery device 100, but is not limited thereto. The battery cell 11 may be cylindrical, flat, rectangular, or in other shapes.

[0110] See also Figures 2 to 4 The present disclosure provides a battery device 100, which includes a housing assembly 20, a battery cell assembly 10, and a heat exchange assembly 30. The battery cell assembly 10 is disposed in the housing assembly 20. The heat exchange assembly 30 is disposed in the housing assembly 20. The heat exchange assembly 30 includes at least two flexible members 31, which are stacked. Figure 3 At least two flexible members 31 are hot-pressed to form a hot-pressing region and a flow channel region 32. The flow channel region 32 is used to conduct a heat exchange medium to exchange heat with the battery cell assembly 10. The hot-pressing region includes a heat-sealing area 34, in which the at least two flexible members 31 are interconnected.

[0111] Please refer to Figure 2 The battery device 100 includes a box assembly 20 and a battery cell assembly 10 . The battery cell assembly 10 includes at least one battery cell 11 . The battery cell 11 is disposed in a first accommodating cavity 23 of the box assembly 20 .

[0112] The housing assembly 20 can be a simple three-dimensional structure such as a single rectangular parallelepiped, cylinder, or sphere, or a complex three-dimensional structure composed of a combination of simple three-dimensional structures such as rectangular parallelepiped, cylinder, or sphere. The housing assembly 20 can be made of an alloy material such as aluminum alloy or iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

[0113] The box assembly 20 is used to encapsulate the battery cell assembly 10 . The box assembly 20 can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cell assembly 10 .

[0114] Please refer to Figures 2 to 9 The embodiment of the present disclosure provides a heat exchange component 30 , which is the heat exchange component 30 of the battery device 100 provided in the embodiment of the present disclosure. The heat exchange component 30 is used to exchange heat with the battery cell assembly 10 .

[0115] Here, the heat exchange component 30 can be arranged in the first accommodating cavity 23 of the box component 20, that is, it can be in direct contact with the battery cell component 10, or it can be arranged outside the first accommodating cavity 23, and heat is transferred through the intermediate medium, thereby realizing heat exchange between the heat exchange component 30 and the battery cell component 10.

[0116] Here, the heat exchange component 30 is arranged in the box component 20, which means that the heat exchange component 30 can be arranged in the first accommodating cavity 23, that is, it can be in direct contact with the battery cell assembly 10 to improve the heat exchange efficiency, or it can be arranged outside the first accommodating cavity 23 and transfer heat through the intermediate medium, thereby realizing heat exchange between the heat exchange component 30 and the battery cell assembly 10.

[0117] That the heat exchange assembly 30 includes at least two flexible members 31 means that the number of the flexible members 31 included in the heat exchange assembly 30 may be two or more than two.

[0118] Here, the flexibility of the flexible member 31 refers to the material properties of the structure. This type of property can be a property imparted to the material due to its light weight, or a property imparted to the material due to at least one of its properties, such as thickness, stiffness, strength, and elastic modulus. As an example, the material of the flexible member 31 can be selected to be a material that is lighter than conventional structures such as aluminum plates or steel plates, and its flexibility can be controlled by the thickness, width, length, and material type of the flexible member 31. By configuring the heat exchange assembly 30 as the flexible member 31 in the embodiment of the present disclosure, the weight of the heat exchange assembly 30 can be reduced.

[0119] In some embodiments, at least two flexible members 31 are formed into a heat pressing area and a flow channel area 32 by heat pressing. The heat pressing area further includes a non-heat sealing area 37 . The non-heat sealing area 37 and the flow channel area 32 are respectively located on both sides of the heat sealing area 34 .

[0120] At least two flexible parts 31 include a heat-sealing area 34. The heat-sealing area 34 is constructed to be formed by hot pressing of at least two flexible parts 31. The heat-sealing area 34 separates the heat exchange component 30 to form a flow channel area 32 and a non-heat-sealing area 37. It means that the flexible parts 31 are hot-pressed to form the flow channel area 32 and the non-heat-sealing area 37. That is, the heat-sealing area 34 separates the flow channel area 32 and the non-heat-sealing area 37.

[0121] The heat exchange medium circulates in the flow channel area 32 to achieve heat exchange with the battery cell assembly 10 .

[0122] It should be noted that the specific type of heat exchange medium is not limited here, as long as it can cool the battery cells 11. For example, it can be gaseous or liquid. In the embodiment of the present disclosure, the heat exchange medium is described as a cooling liquid.

[0123] Exemplarily, the heat exchange assembly 30 further includes an inlet 35 and an outlet 36 , both of which are in communication with the flow channel area 32 .

[0124] Here, the inlet 35 and the outlet 36 of the heat exchange assembly 30 are used to connect to the pipelines of the air conditioning system or the water tank or other liquid storage device of the vehicle or electrical equipment.

[0125] It should be noted that the specific number of the flow channel regions 32 is not limited here and can be one or more.

[0126] The multiple mentioned in the embodiments of the present disclosure refers to a number of two or more.

[0127] The principle of heat exchange of the heat exchange component 30 for the battery cell assembly 10 is as follows: the heat exchange medium output by the heat exchange medium source (not shown) enters the flow channel area through the inlet 35 of the heat exchange component 30. After the heat exchange medium exchanges heat with the battery cell assembly 10, the heat exchange medium flows out through the outlet 36 of the heat exchange component 30, completing the heat exchange of the battery cell assembly 10.

[0128] Here, the heat exchange assembly 30 exchanging heat with the battery cell assembly 10 may be to dissipate heat from the battery cell assembly 10 or to heat the battery cell assembly 10 .

[0129] The principle of heat dissipation of the battery cell assembly 10 by the heat exchange component 30 is as follows: the heat exchange medium output by the heat exchange medium source enters the flow channel area through the inlet 35 of the heat exchange component 30. After the heat exchange medium absorbs the heat generated during the operation of the battery cell assembly 10, the heat exchange medium flows out through the outlet 36 of the heat exchange component 30, releasing heat, thereby completing the cooling and heat dissipation of the battery cell assembly 10.

[0130] The principle of the heat exchange component 30 heating the battery cell assembly 10 is as follows: the heat exchange medium output by the heat exchange medium source enters the flow channel area through the inlet 35 of the heat exchange component 30, and the heat exchange medium transfers heat to the battery cell assembly 10. After heating the battery cell assembly 10, the heat exchange medium flows out through the outlet 36 of the heat exchange component 30, completing the heating of the battery cell assembly 10.

[0131] The flexible part 31 is set as a flexible structure. The flexible part 31 has certain expandable or contractible characteristics. It can also be understood that the flexible part 31 can be an elastically deformable structure. The flexible part 31 has the ability to deform and restore deformation, so that the heat exchange component 30 can be formed into a contoured structure. The heat exchange component 30 can better adapt to the external contour shape of the battery cell or other components to improve the fit between the heat exchange component 30 and the box component 20 and / or the battery cell component 10, thereby increasing the effective heat exchange area between the heat exchange component 30 and the box component 20 and / or the battery cell component 10, thereby improving the heat exchange efficiency.

[0132] It should be noted that the flexible part 31 can have conductive properties, which is conducive to maintaining an equipotential setting with the box assembly 20; the flexible part 31 can also have electrical insulation properties, without the need for insulation treatment, which is conducive to reducing the leakage risk and production cost of the battery device 100, thereby improving the reliability of the battery device 100.

[0133] The battery device provided in the embodiment of the present disclosure includes a housing assembly 20, a battery cell assembly 10, and a heat exchange assembly 30. The battery cell assembly 10 is disposed in the housing assembly 20, and the housing assembly 20 protects the battery cell assembly 10. The heat exchange assembly 30 is used to exchange heat with the battery cell assembly 10. On the one hand, the heat exchange component 30 is made of a flexible part 31, and the flexible part 31 is relatively light, which is beneficial to reducing the mass of the battery device 100, reducing the production cost of the heat exchange component 30, and improving the energy density of the battery device 100; on the other hand, by setting the flexible part 31 as a flexible structure, the flexible structure has a certain deformation ability, which can make the heat exchange component 30 better fit and adapt to the box component 20 and / or the battery cell component 10, thereby absorbing the assembly tolerance of the heat exchange component 30, improving the fit between the heat exchange component 30 and the box component 20 and / or the battery cell component 10, and increasing the effective heat exchange area between the heat exchange component 30 and the box component 20 and / or the battery cell component 10, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange component 30.

[0134] Furthermore, the flexible member 31 is formed by hot pressing into a heat pressing region and a flow channel region 32. The flow channel region 32 is used to conduct the heat exchange medium. This simple forming method is used. The heat pressing region is provided with a non-heat-sealing region 37. The non-heat-sealing region 37 and the flow channel region 32 are located on either side of the heat-sealing region 34, which helps to reduce the width of the heat-sealing region 34. This alleviates the problem of excessively wide heat-sealing regions 34 causing excessive temperatures, which can affect the heat pressing quality and damage the flexible member 31. Furthermore, the non-heat-sealing region 37 also forms a buffer zone for stress release when the flexible member 31 is folded, thereby alleviating stress concentration in the heat-sealing region 34, which can lead to damage to the heat-sealing region 34.

[0135] Here, the heat exchange assembly 30 can be disposed in the first accommodating cavity 23 , that is, the heat exchange assembly 30 can be in direct contact with the battery cell assembly 10 , thereby further improving the heat exchange efficiency between the heat exchange assembly 30 and the battery cell assembly 10 .

[0136] Of course, in other implementations, see Figure 2 , the heat exchange component 30 can be arranged outside the first accommodating chamber 23.

[0137] That is, at least a portion of the heat exchange assembly 30 is disposed outside the first accommodating cavity 23 to separate the heat exchange assembly 30 from the battery cell assembly 10 .

[0138] In related technologies, the heat exchange assembly and the battery cell assembly are arranged in the same space, which is conducive to ensuring heat exchange efficiency. However, when the battery cell assembly is in a very abnormal condition, the heat exchange medium in the cooling system may leak. The leaked heat exchange medium increases the risk of short circuit of the battery cell assembly in the battery device box to a certain extent, affecting the reliability of the battery device.

[0139] In this embodiment, a heat exchange assembly 30 is provided on the outside of the first accommodating cavity 23 to separate the heat exchange assembly 30 from the battery cell assembly 10, thereby reducing the risk of the heat exchange medium of the heat exchange assembly 30 leaking and contacting the battery cell assembly 10, thereby reducing the risk of short circuit of the battery device 100 and improving the reliability of the battery device 100.

[0140] The box assembly 20 is used to accommodate the battery cell assembly 10. The box assembly 20 can be of various structures. In some embodiments, please refer to Figure 2 The housing assembly 20 includes a housing body 21. The housing body 21 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 together define a first accommodating cavity 23 for accommodating the battery cell assembly 10. The second housing portion 212 may be a hollow structure with one end open. The first housing portion 211 is a plate-like structure. The first housing portion 211 covers the open side of the second housing portion 212 to form the housing body 21 having the first accommodating cavity 23. The first housing portion 211 and the second housing portion 212 may also each be a hollow structure with one end open. The open side of the first housing portion 211 covers the open side of the second housing portion 212 to form the housing body 21 having the first accommodating cavity 23. Of course, the first housing portion 211 and the second housing portion 212 may have various shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0141] In order to improve the sealing performance after the first box body 211 and the second box body 212 are connected, a sealing member, such as a sealant, a sealing ring, etc., may also be provided between the first box body 211 and the second box body 212 .

[0142] Assuming that the first box portion 211 covers the top of the second box portion 212 , the first box portion 211 can also be referred to as an upper box cover, and the second box portion 212 can also be referred to as a lower box cover.

[0143] For other embodiments, please refer to Figure 2 The box assembly 20 can also be configured to include a box body 21 and a bottom guard plate 22 according to needs. A second accommodating cavity 24 is formed between the bottom guard plate 22 and the outer wall of the box body 21. A heat exchange assembly 30 is disposed in the second accommodating cavity 24.

[0144] It should be noted that the bottom guard plate 22 can be disposed at the bottom of the box body 21. In this case, the bottom guard plate 22 is, for example, a bottom guard plate 22. The bottom guard plate 22 can also be disposed at the top of the box body 21 or at the side of the box body 21. The function of the bottom guard plate 22 is to protect the box body 21 and reduce the risk of external debris colliding with the box body 21 during driving, thereby improving the reliability of the battery cell assembly 10.

[0145] For example, see Figures 2 to 4 The box assembly 20 includes a box body 21 and a bottom guard plate 22. The box body 21 includes a first box body portion 211 and a second box body portion 212. A first accommodating cavity 23 is formed between the first box body portion 211 and the second box body portion 212. A second accommodating cavity 24 is formed between the bottom guard plate 22 and the second box body portion 212. A heat exchange assembly 30 is arranged in the second accommodating cavity 24.

[0146] Here, the heat exchange component 30 is arranged in the second accommodating chamber 24, which means that the heat exchange component 30 can be arranged only in the second accommodating chamber 24, or the heat exchange component 30 can be arranged in other areas except the second accommodating chamber 24 in addition to being arranged in the second accommodating chamber 24.

[0147] A second accommodating cavity 24 is formed between the bottom guard plate 22 and the second box portion 212 , that is, the first accommodating cavity 23 and the second accommodating cavity 24 are separated.

[0148] Here, by providing the bottom guard plate 22 , while protecting the box assembly 20 and the battery cell 11 , it can also support and protect the heat exchange assembly 30 .

[0149] The heat exchange assembly 30 is arranged in the second accommodating cavity 24, that is, the heat exchange assembly 30 is arranged outside the first accommodating cavity 23, so as to separate the heat exchange assembly 30 from the battery cell assembly 10, thereby avoiding the heat exchange medium of the heat exchange assembly 30 from leaking and contacting the battery cell assembly 10, thereby causing the battery device 100 to short-circuit, thereby improving the reliability of the battery device 100.

[0150] In this embodiment, a bottom guard plate 22 is provided on the outside of the box body 21 to define a second accommodating chamber 24 between the bottom guard plate 22 and the second box portion 212. The heat exchange assembly 30 is disposed within the second accommodating chamber 24 for heat exchange with the box body 21, thereby achieving heat exchange with the battery cell assembly 10 carried within the box body 21. In other words, by disposing the heat exchange assembly 30 outside the first accommodating chamber 23 of the box assembly 20, the problem of short circuiting the battery device 100 due to leakage of the heat exchange medium from the heat exchange assembly 30 can be avoided to a certain extent, thereby improving the reliability of the battery device 100 and maximizing the utilization of the accommodating chamber within the box assembly 20, thereby increasing the compactness of the battery device 100. Furthermore, by providing the bottom guard plate 22, the bottom guard plate 22 cooperates with the box body 21 to connect and protect the battery cell assembly 10, further improving the reliability of the box assembly 20.

[0151] In some embodiments, see Figures 2 to 7Part of the bottom guard plate 22 protrudes to form a circle of connecting portion 221, and the connecting portion 221 is sealed and connected to the second box body portion 212.

[0152] Exemplarily, the bottom guard plate 22 may be a circle of protrusions at the outermost edge to form a circle of connecting portions 221 .

[0153] The specific method of connecting the connecting portion 221 and the second box body portion 212 is not limited herein. For example, the connecting portion 221 and the second box body portion 212 are fastened together by bolts, screws, or rivets.

[0154] In this embodiment, the protruding connecting portion 221 forms a circle, which not only connects to the second housing portion 212 but also defines a second accommodating chamber 24 between the bottom guard plate 22 and the second housing portion 212. Furthermore, the sealing connection between the connecting portion 221 and the second housing portion 212 can, to a certain extent, prevent mud, sand, or water from entering the second accommodating chamber 24, thereby protecting the heat exchange assembly 30 in the second accommodating chamber 24.

[0155] In some embodiments, the box assembly 20 further includes a seal, which is disposed between the connecting portion 221 and the second box portion 212 to achieve a sealed connection between the connecting portion 221 and the second box portion 212 .

[0156] Exemplarily, the sealing member is, for example, a sealing strip.

[0157] In this embodiment, a seal is provided and the seal is clamped between the connecting portion 221 and the second box body portion 212. That is, the seal is used to seal the gap between the connecting portion 221 and the second box body portion 212, which further helps to prevent mud or water from entering the second accommodating cavity 24, thereby improving the sealing performance between the bottom guard plate 22 and the second box body portion 212; at the same time, it can also reduce the occurrence of liquid leakage from the heat exchange component 30.

[0158] In some embodiments, see Figures 4 to 7 Part of the bottom guard plate 22 is protruding to form a limiting structure 222. The limiting structure 222 is used to support the flexible member 31 and / or the second box portion 212.

[0159] Here, the limiting structure 222 is used to support the flexible member 31 and / or the second box body 212, which means that the limiting structure 222 abuts against the flexible member 31 and / or the second box body 212, providing a certain supporting force for the flexible member 31 and / or the second box body 212. In other words, the limiting structure 222 can be used to support the flexible member 31, the second box body 212, or both the flexible member 31 and the second box body 212.

[0160] It should be noted that part of the area of the bottom guard plate 22 is protruding to form a limiting structure 222, which may mean that the side of the bottom guard plate 22 facing away from the box body 21 is concave, so that the side of the bottom guard plate 22 facing the box body 21 is protruding to form the limiting structure 222; it may also be that the side of the bottom guard plate 22 facing away from the box body 21 is not concave, and the side of the bottom guard plate 22 facing the box body 21 is thickened and protruded to form the limiting structure 222.

[0161] The limiting structure 222 is used to support the flexible member 31 and / or the second box portion 212 so as to form a fixed space between the bottom guard plate 22 and the second box portion 212 , which is beneficial to improving the reliability of the battery device 100 .

[0162] In this embodiment, the bottom guard plate 22 is used to support the flexible part 31 and / or the second box body 212 by setting a limiting structure 222. This is beneficial to improving the problem of deformation of the second box body 212 due to insufficient support strength when it is under pressure, thereby improving the problem of the second box body 212 directly adhering to the heat exchange component 30, which causes the heat exchange component 30 to be crushed. It is beneficial to improve the stability of the thermal interface contact of the heat exchange component 30, thereby improving the thermal management performance of the heat exchange component 30.

[0163] In some embodiments, the limiting structure 222 causes the flexible member 31 to abut against the second box portion 212 to support the flexible member 31 and the second box portion 212 .

[0164] For example, in an embodiment where the limiting structure 222 is used to support the flexible member 31 , the limiting structure 222 may be supported on the surface of the flexible member 31 and cause the flexible member 31 to abut against the second box portion 212 .

[0165] In this embodiment, the limiting structure 222 is provided to abut the flexible member 31 against the second box body portion 212 , which not only supports the second box body portion 212 but also fixes the heat exchange assembly 30 , thereby improving the stability of the heat exchange assembly 30 .

[0166] In some embodiments, please refer to Figures 2 to 7 The heat exchange assembly 30 is provided with an avoidance hole 33 , and the limiting structure 222 passes through the avoidance hole 33 to abut against the second box portion 212 .

[0167] Here, the heat exchange component 30 is provided with an avoidance hole 33 , that is, the flexible member 31 is provided with an avoidance hole 33 , and the avoidance hole 33 passes through two opposite sides of the heat exchange component 30 in the thickness direction.

[0168] It should be noted that the avoidance hole 33 needs to avoid the flow channel area 32 .

[0169] Here, the specific position and number of the avoidance holes 33 are not limited and are determined according to specific circumstances.

[0170] For example, in an embodiment where the limiting structure 222 is used to support the second box body portion 212 , the heat exchange assembly 30 may be provided with an avoidance hole 33 for avoiding the limiting structure 222 so that the limiting structure 222 passes through the avoidance hole 33 to abut against the second box body portion 212 .

[0171] In this embodiment, the heat exchange component 30 avoids the limiting structure 222 by setting an avoidance hole 33. The limiting structure 222 passes through the avoidance hole 33 to abut against the second box body 212. While supporting the second box body 212, it can also position the heat exchange component 30, thereby improving the stability of the heat exchange component 30.

[0172] In some embodiments, see Figures 2 to 7 , the width of the heat sealing area 34 is 0.5mm-30mm.

[0173] For example, 0.5mm, 1mm, 1.5mm, 2mm, 3mm, 4mm, 5mm, 8mm, 10mm, 12mm, 13mm, 15mm, 18mm, 20mm, 21mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, and so on.

[0174] It can be understood that by setting the heat sealing area 34 of appropriate width, it is helpful to ensure the sealing of the flow channel area 32, that is, it is helpful to ensure the reliability of the flow channel area 32. It can also improve the problem of excessive temperature caused by the heat sealing area 34 being too wide, affecting the hot pressing quality and damaging the flexible part 31.

[0175] In this embodiment, by setting the width of the heat sealing area 34 to 0.5mm-30mm, it is beneficial to improve the reliability of the flow channel area 32 of the flexible part 31, improve the coverage of the flow channel area 32, and thus improve the heat exchange efficiency of the heat exchange component 30. At the same time, it can also improve the problem of excessive temperature caused by the heat sealing area 34 being too wide, affecting the hot pressing quality and damaging the flexible part 31.

[0176] In some embodiments, see Figures 2 to 7 , the width of the heat-sealing area 34 is 2mm-3mm.

[0177] For example, 2.0mm, 2.1mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm, etc.

[0178] In this embodiment, by setting the width of the heat sealing area 34 to 2 mm-3 mm, it is helpful to further improve the problem that the temperature is too high due to the heat sealing area 34 being too wide, affecting the hot pressing quality and damaging the flexible part 31.

[0179] In some embodiments, see Figure 8 and Figure 9 , the flow channel area 32 surrounds the closed area 38 .

[0180] The closed area 38 is formed by being surrounded by the flow channel areas 32 , that is, the closed area 38 is located between the flow channel areas 32 , and the heat-sealing area 34 separates the closed area 38 from the flow channel areas 32 .

[0181] Exemplarily, the non-heat-sealed area 37 also includes an open area 39, which is located on the inner side of the flow channel area 32. One end of the open area 39 is connected to the heat-sealed area 34, and the other end extends to the edge of the flexible part 31. The flow channel area 32 separates the closed area 38 from the open area 39.

[0182] It should be noted that the closed area 38 is generally in a closed state, but the closed area 38 is connected to the flow channel area 32 due to process problems, which also falls within the scope of protection of the present disclosure.

[0183] In the related art, if the areas between adjacent flow channel areas are all formed into heat-sealed areas, the width of the heat-sealed areas will be too large, and there will be problems such as excessively high temperatures due to the wide heat-sealed areas, affecting the hot pressing quality and damaging the flexible parts.

[0184] In this embodiment, the flow channel area 32 is surrounded by the closed area 38, so that the width of the heat-sealing area 34 can be controlled. That is to say, by setting the closed area 38, it is beneficial to improve the reliability of the heat-sealing area 34, and it can also improve the problem that the temperature is too high due to the heat-sealing area 34 being too wide, affecting the hot pressing quality and damaging the flexible part 31.

[0185] In some embodiments, see Figure 8 and Figure 9 The closed area 38 includes a first sub-area 381, which extends along the first direction. The size of the first sub-area 381 in the second direction is D, 1mm≤D≤50mm, and the first direction is perpendicular to the second direction.

[0186] D can be any one of the point values of 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 15mm, 18mm, 20mm, 30mm, 40mm, 50mm, or any point value between any two of them.

[0187] For example, the box assembly 20 is generally a rectangular parallelepiped structure, the length and width directions of the box assembly 20 are parallel to the horizontal plane, and the length direction of the box assembly 20 is parallel to the longest side of the rectangular parallelepiped structure of the box assembly 20. The height direction of the box assembly 20 is perpendicular to the ground. For example, Figure 2 、 Figure 3 and Figure 8 As shown, the length direction of the box assembly 20 is represented by X, the width direction of the box assembly 20 is represented by Y, and the height direction of the box assembly 20 is represented by Z.

[0188] For example, the first direction may be the length direction of the box assembly 20 , and the second direction may be the width direction of the box assembly 20 .

[0189] When D ≥ 1 mm, adjacent heat-sealing areas 34 can be separated, which helps to improve the situation where the heat-sealing areas 34 overlap, resulting in a larger width during hot pressing. This, in turn, improves the problem of excessively wide heat-sealing areas 34 causing excessively high temperatures, affecting hot pressing quality, and damaging the flexible member 31. When D ≤ 50 mm, it helps to control the spacing between adjacent flow channel areas 32, thereby improving heat exchange efficiency and effectiveness. Therefore, when 1 mm ≤ D ≤ 50 mm, both hot pressing quality and heat exchange efficiency are achieved, making the heat exchange assembly 30 more practical.

[0190] In some embodiments, see Figure 8 and Figure 9 The non-heat-sealed area 37 further includes a second sub-area 382 , which extends along the second direction. The size of the second sub-area 382 in the first direction is D, 1mm≤D≤50mm.

[0191] D can be any one of the point values of 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 15mm, 18mm, 20mm, 30mm, 40mm, 50mm, or any point value between any two of them.

[0192] Here, the first direction may be a length direction of the box assembly 20 , and the second direction may be a width direction of the box assembly 20 .

[0193] When D ≥ 1 mm, adjacent heat-sealing areas 34 can be separated, which helps to improve the situation where the heat-sealing areas 34 overlap, resulting in a larger width during hot pressing. This, in turn, improves the problem of excessively wide heat-sealing areas 34 causing excessively high temperatures, affecting hot pressing quality, and damaging the flexible member 31. When D ≤ 50 mm, it helps to control the spacing between adjacent flow channel areas 32, thereby improving heat exchange efficiency and effectiveness. Therefore, when 1 mm ≤ D ≤ 50 mm, both hot pressing quality and heat exchange efficiency are achieved, making the heat exchange assembly 30 more practical.

[0194] In some embodiments, see Figure 8 and Figure 9 , at least part of the closed area 38 is provided with an arc-shaped area 384 at the end along the extension direction.

[0195] Here, the arc-shaped area 384 may be provided at the end of a portion of the closed area 38 along the extension direction, or the arc-shaped area 384 may be provided at the end of the entire closed area 38 along the extension direction.

[0196] Here, the arc-shaped area 384 may be provided at one end of the closed area 38 along the extension direction, or may be provided at both ends of the closed area 38 along the extension direction.

[0197] An arc is a shape that is a portion of a circle or ellipse. Any shape that deviates from a straight line or horizontal line or bends so that it appears to be an arc of a circle or ellipse.

[0198] Of course, the flow channel area 32 may also transition through an arc at the corner.

[0199] In this embodiment, by providing an arc-shaped area 384 at the end of the closed area 38 along the extension direction, on the one hand, it is helpful to improve the problem of overlap of the heat-sealed area 34 located at the end of the closed area 38. On the other hand, it can also avoid the problem of stress concentration caused by the right angle at the end of the closed area 38, thereby improving the problem of failure of the heat-sealed area 34 due to stress concentration and improving the hot pressing quality.

[0200] In some embodiments, please refer to Figure 8 and Figure 9 The radius of the arc area 384 is R, 4mm≤R≤30mm.

[0201] R can be any one of 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 10mm, 15mm, 18mm, 20mm, 30mm or any point value between any two of them.

[0202] When R ≥ 4 mm, adjacent heat-sealing areas 34 can be separated, which helps to improve the situation where the heat-sealing areas 34 overlap, resulting in a larger hot pressing width in the area. This can further improve the problem of excessively wide heat-sealing areas 34 causing excessive temperatures, affecting the hot pressing quality, and damaging the flexible member 31. It can also further avoid the problem of stress concentration caused by the right angle at the end of the sealing area 38, thereby improving the problem of failure of the heat-sealing area 34 due to stress concentration and improving the hot pressing quality. When R ≤ 30 mm, it is beneficial to control the spacing between adjacent flow channel areas 32, thereby improving heat exchange efficiency and heat exchange effect. Therefore, when 4 mm ≤ R ≤ 30 mm, both hot pressing quality and heat exchange efficiency can be taken into account, and the practicality of the heat exchange assembly 30 is enhanced.

[0203] In some embodiments, 8 mm ≤ R ≤ 20 mm.

[0204] R can be any one of 8mm, 8.5mm, 9mm, 9.5mm, 10mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5mm, 14mm, 14.5mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm or any point value between any two of them.

[0205] When 8mm≤R≤20mm, the hot pressing quality and heat exchange efficiency can be further improved, and the practicality of the heat exchange component 30 is stronger.

[0206] In some embodiments, see Figure 8 and Figure 9 The enclosed area 38 includes a main area 383 and an arc-shaped area 384. The main area 383 extends along a first direction, and the arc-shaped area 384 is provided at at least one end of the main area 383 along the first direction. The size of the main area 383 in the second direction is D, and the radius of the arc-shaped area 384 is R, where R ≥ D / 2, and the first direction is perpendicular to the second direction.

[0207] That is, by setting the diameter of the arc region 384 to be larger than the dimension of the main body region 383 in the direction perpendicular to the extending direction.

[0208] In this embodiment, when R≥D / 2, adjacent heat-sealing areas 34 can be separated, which is beneficial to improving the situation where the heat-sealing areas 34 have a large hot pressing width due to overlap, thereby improving the problem of excessive temperature caused by the heat-sealing areas 34 being too wide, affecting the hot pressing quality and damaging the flexible part 31. It can also avoid the problem of stress concentration caused by the right angle at the end of the closed area 38, thereby improving the problem of failure of the heat-sealing area 34 due to stress concentration, and further improving the hot pressing quality.

[0209] In some embodiments, see Figure 8 and Figure 9 , the main body area 383 and the arc area 384 are smoothly connected.

[0210] The smooth connection between the main body area 383 and the arc area 384 refers to a smooth transition between the main body area 383 and the arc area 384 through an arc, which further improves the problem of failure of the heat sealing area 34 due to stress concentration and further improves the hot pressing quality.

[0211] In some embodiments, please refer to Figure 8 and Figure 9 , the central angle corresponding to the arc area 384 is greater than or equal to 180°.

[0212] The central angle corresponding to the arc region 384 is greater than or equal to 180°, that is, the area corresponding to the arc region 384 is greater than or equal to a semicircle, which is helpful to further improve the problem of stress concentration.

[0213] In some embodiments, at least two flexible members 31 are configured as metal plasticized films.

[0214] The flexible member 31 is a single-layer or multi-layer film.

[0215] Here, the metal-plasticized film is a metal-plastic composite material, that is, it includes a metal layer and a plastic layer.

[0216] In this embodiment, the thin and lightweight metal-plasticized film, coupled with the flow channel region 32 formed between at least two metal-plasticized films, is unaffected by the extrusion process and eliminates the need for high thickness requirements. This reduces the overall thickness and weight of the heat exchange assembly 30. Furthermore, the insulating properties of the metal-plasticized film reduce the risk of insulation failure. This reduces the risk of reaction between the heat exchange assembly 30 and the heat exchange medium flowing therein, further minimizing the risk of corrosion and leakage of the heat exchange medium.

[0217] Exemplarily, at least two flexible members 31 are configured as aluminum-plastic films.

[0218] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0219] In some embodiments, the flexible member 31 is a layered structure, and the flexible member 31 includes a metal layer and a non-metal layer, and the metal layer and the non-metal layer are stacked in sequence.

[0220] Here, the flexible member 31 includes a metal layer and a non-metal layer, that is, a composite material member composed of the metal layer and the non-metal layer.

[0221] For example, the metal layer and the non-metal layer may be formed by hot pressing or hot melting.

[0222] Here, the number of metal layers and non-metal layers is not limited.

[0223] In this embodiment, the flexible member 31, composed of a stack of metal and non-metal layers, is thin and lightweight. Furthermore, by forming a flow channel region 32 between at least two flexible members 31, it is unaffected by the extrusion process and eliminates the need for high thickness requirements. This reduces the overall thickness and weight of the heat exchange assembly 30. Furthermore, the heat exchange assembly 30 does not react with the heat exchange medium flowing within it, eliminating the risk of corrosion or leakage.

[0224] In some embodiments, the metal layer includes one of aluminum foil, copper foil, and steel foil.

[0225] By setting the metal layer to be one of aluminum foil, copper foil and steel foil, the flexible member 31 can have a certain structural strength and can play an isolation role.

[0226] In some embodiments, the non-metallic layer includes one of polypropylene, polyvinyl chloride, and polyethylene.

[0227] By setting the non-metallic layer to be one of polypropylene, polyvinyl chloride and polyethylene, the flexible member 31 can have a certain waterproof effect.

[0228] For example, a non-metallic layer made of a corrosion-resistant material having acid and alkali corrosion resistance may be selected, or in other words, additives may be added to the non-metallic layer to make the non-metallic layer have acid and alkali corrosion resistance.

[0229] In some embodiments, the non-metallic layer is a hot melt layer.

[0230] Here, by setting the non-metallic layer as a hot-melt layer, that is, composed of a hot-melt material, it is advantageous to combine the non-metallic layer and the metal layer through hot melting, which makes molding simple and the production efficiency high.

[0231] In some embodiments, the flexible member 31 is a layered structure, and the flexible member 31 includes a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged in sequence. The waterproof layer is closer to the flow channel area 32 than the corrosion-resistant layer.

[0232] Here, the corrosion-resistant layer may be a nylon layer formed of nylon material, thereby having certain corrosion resistance, such as acid and alkali corrosion resistance.

[0233] The isolation layer may be a metal layer, and the metal layer may be configured as one of aluminum foil, copper foil and steel foil, which can provide the flexible member 31 with a certain structural strength and play an isolation role.

[0234] The waterproof layer may be a non-metallic layer, and the non-metallic layer may be set to be one of polypropylene, polyvinyl chloride and polyethylene, so that the flexible member 31 can have a certain waterproof effect.

[0235] In this embodiment, by configuring the flexible member 31 to include a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged in sequence, the waterproof layer is closer to the flow channel area 32 than the corrosion-resistant layer, which is beneficial to improving the reliability of the heat exchange component 30.

[0236] In some embodiments, the isolation layer has a thickness of 6.5 μm to 100 μm.

[0237] The thickness of the isolation layer can be any one of 6.5μm, 10μm, 15μm, 20μm, 25μm, 30μm, 35μm, 38μm, 40μm, 45μm, 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 92μm, 95μm, 100μm or any value between two of them.

[0238] In this embodiment, by setting the thickness of the isolation layer to 6.5 μm-100 μm, the flexible member 31 can have a certain structural strength and flexibility.

[0239] In some embodiments, the isolation layer has a thickness of 6.5 μm to 15 μm.

[0240] The thickness of the isolation layer can be any one of 6.5μm, 7μm, 7.5μm, 7.8μm, 8μm, 8.3μm, 8.5μm, 8.8μm, 9μm, 9.2μm, 9.5μm, 9.7μm, 10μm, 10.3μm, 10.5μm, 10.8μm, 11μm, 11.5μm, 11.8μm, 12μm, 12.3μm, 12.5μm, 13μm, 13.5μm, 14μm, 14.5μm, 15μm or any value between any two of them.

[0241] In this embodiment, by setting the thickness of the isolation layer to 6.5 μm-15 μm, the flexible member 31 can be further endowed with certain structural strength and flexibility.

[0242] In some embodiments, the corrosion-resistant layer has a thickness of 5 μm to 20 μm.

[0243] The thickness of the corrosion-resistant layer can be 5μm, 5.5μm, 5.8μm, 6μm, 6.5μm, 7μm, 7.5μm, 7.8μm, 8μm, 8.3μm, 8.5μm, 8.8μm, 9μm, 9.2μm, 9.5μm, 9.7μm, 10μm, 10.3μm, 10.5μm, 10.8μm, 11μm, 11.5μm, 11. Any one of the point values of 8μm, 12μm, 12.3μm, 12.5μm, 13μm, 13.5μm, 14μm, 14.5μm, 15μm, 15.5μm, 16μm, 16.5μm, 17μm, 17.5μm, 18μm, 18.5μm, 18.7μm, 19μm, 19.5μm, 20μm or any point value between any two of them.

[0244] In this embodiment, by setting the thickness of the corrosion-resistant layer to 5 μm-20 μm, the wear resistance and toughness of the flexible member 31 can be improved.

[0245] In some embodiments, the waterproof layer has a thickness of 50 μm to 120 μm.

[0246] The thickness of the waterproof layer can be any one of 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 92μm, 95μm, 100μm, 105μm, 108μm, 110μm, 115μm, 120μm or any value between two of them.

[0247] In this embodiment, by setting the thickness of the waterproof layer to 50 μm-120 μm, the waterproof layer can have a certain structural strength, improve the waterproof performance, and facilitate hot pressing connection of the flexible member 31 through the waterproof layer.

[0248] In some embodiments, the thickness of the flexible member 31 is 0.05 mm to 0.3 mm.

[0249] For example, 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, 0.3mm, etc.

[0250] In this embodiment, by setting the thickness of the flexible part 31 to 0.05mm-0.3mm, the heat exchange component 30 made of the flexible part 31 has a certain structural strength while the overall thickness of the heat exchange component 30 is smaller, which is beneficial to reducing the overall volume and weight of the battery device 100 and increasing the energy density of the battery device 100.

[0251] In some embodiments, the thickness of the flexible member 31 is 0.08 mm to 0.2 mm.

[0252] For example, 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, etc.

[0253] In this embodiment, by setting the thickness of the flexible part 31 to 0.08mm-0.2mm, the heat exchange component 30 made of the flexible part 31 has a certain structural strength, and the overall thickness of the heat exchange component 30 is further made smaller, which is beneficial to further reduce the overall volume and weight of the battery device 100, so as to further increase the energy density of the battery device 100.

[0254] In some embodiments, the elastic modulus of the flexible member 31 is 0.1 MPa-10000 MPa.

[0255] Exemplarily, the elastic modulus of the flexible part 31 can be any one of 0.1 MPa, 1 MPa, 50 MPa, 100 MPa, 150 MPa, 200 MPa, 300 MPa, 500 MPa, 800 MPa, 1000 MPa, 1300 MPa, 1500 MPa, 1800 MPa, 2000 MPa, 2500 MPa, 2800 MPa, 3000 MPa, 3500 MPa, 4000 MPa, 4500 MPa, 5000 MPa, 5500 MPa, 6000 MPa, 6500 MPa, 7000 MPa, 7500 MPa, 8000 MPa, 8500 MPa, 8800 MPa, 9000 MPa, 9500 MPa, 9700 MPa, and 10000 MPa, or any point value between any two of them.

[0256] The elastic modulus describes the unit strain caused by unit stress when a solid is subjected to a certain force range. It is one of the fundamental physical quantities of a material. The larger the elastic modulus, the greater the material's stiffness and compressive resistance. The elastic modulus is a physical quantity that describes the elasticity of a material.

[0257] In this embodiment, by setting the elastic modulus of the flexible part 31 to 0.1MPa-10000MPa, the flexible part 31 has a certain structural strength, thereby improving the reliability of the heat exchange component 30, and has a certain deformation ability, which can improve the fit between the heat exchange component 30 and the box component 20 and / or the battery component battery cell component 10, thereby increasing the effective heat exchange area between the heat exchange component 30 and the box component 20 and / or the battery component battery cell component 10, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange component 30.

[0258] In a specific embodiment, please refer to Figures 2 to 4 The battery device includes a box assembly 20, a battery cell assembly 10 and a heat exchange assembly 30. The box assembly 20 has a first accommodating cavity 23. The battery cell assembly 10 is disposed in the first accommodating cavity 23. The heat exchange assembly 30 is disposed in the box assembly 20. The heat exchange assembly 30 includes at least two flexible members 31. Figure 3At least two flexible parts 31 are stacked, and at least one flow channel area 32 is formed between the flexible parts 31. The at least one flow channel area 32 is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the battery cell assembly 10. The box assembly 20 includes a box body 21 and a bottom guard plate 22. The box body 21 may include a first box body portion 211 and a second box body portion 212. The first box body portion 211 and the second box body portion 212 cover each other, and the first box body portion 211 and the second box body portion 212 jointly define a first accommodating chamber 23 for accommodating the battery cell assembly 10. A second accommodating chamber 24 is formed between the bottom guard plate 22 and the outer wall of the box body 21. The heat exchange assembly 30 is arranged in the second accommodating chamber 24. Part of the bottom guard plate 22 protrudes to form a circle of connecting portions 221, and the connecting portions 221 are sealed and connected to the second box body portion 212. Partially protruding areas of the bottom guard plate 22 form a retaining structure 222. The heat exchange assembly 30 is provided with a relief hole 33, through which the retaining structure 222 passes to support the second housing portion 212. The retaining structure 222 is disposed in the center of the second accommodating cavity 24. At least two flexible members 31 are configured as aluminum-plastic films. At least two flexible members 31 include a hot-pressing region. The hot-pressing region is configured such that at least two flexible members 31 are formed by hot pressing. The hot-pressing region separates the heat exchange assembly 30 to form at least one flow channel region 32.

[0259] In one specific embodiment, the flexible member 31 has a layered structure, comprising a corrosion-resistant layer, an isolation layer, and a waterproof layer, arranged in sequence. The waterproof layer is closer to the flow channel region 32 than the corrosion-resistant layer. The isolation layer has a thickness of 6.5 μm to 15 μm. The corrosion-resistant layer has a thickness of 5 μm to 20 μm. The waterproof layer has a thickness of 50 μm to 120 μm. The flexible member 31 has a thickness of 0.05 mm to 0.3 mm. The elastic modulus of the flexible member 31 is 0.1 MPa to 10,000 MPa.

[0260] It should be noted that the width of the heat-sealing area 34 can be measured by a vernier caliper before the heat exchange assembly is assembled to the box assembly, the size of the first sub-area 381 in the second direction can be measured by a vernier caliper before the heat exchange assembly is assembled to the box assembly, and the radius of the arc area 384 can be measured by a caliper before the heat exchange assembly is assembled to the box assembly; the thickness of the corrosion-resistant layer, the isolation layer and the waterproof layer can be measured by a vernier caliper; the thickness of the flexible part 31 can be measured by a vernier caliper before the heat exchange assembly is assembled to the box assembly. It should be noted that the above measurements can all be carried out at normal temperature and pressure.

[0261] The elastic modulus of the flexible member 31 may be measured by at least one of a static tensile test method, a dynamic test method, a sonic velocity method, a nanoindentation method, and a bending method. The measuring instrument may include a nanoindenter and a universal testing machine.

[0262] For example, the elastic modulus of the flexible member 31 can be measured at room temperature and pressure by nanoindentation. The nanoindentation method uses a tiny indenter to indent the surface of the flexible member 31 and calculates the elastic modulus by analyzing the relationship between the indentation depth and the load.

[0263] In the description of the present disclosure, the descriptions with reference to the terms "in one embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present disclosure. In the present disclosure, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine different embodiments or examples described in the present disclosure and features of different embodiments or examples, unless they are mutually inconsistent.

[0264] The foregoing description is merely a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present disclosure are intended to be within the scope of protection of the present disclosure.

Claims

1. A battery device, characterized in that: include: Cabinet assembly; A battery cell assembly is disposed in the box assembly; A heat exchange assembly is provided in the box assembly; the heat exchange assembly comprises at least two flexible members, the at least two flexible members are stacked, and the at least two flexible members are formed into a hot pressing area and a flow channel area by hot pressing; The flow channel area is used to conduct heat exchange medium to perform heat exchange on the battery monomer assembly; the hot pressing area includes a heat sealing area, and the at least two flexible parts are connected to each other in the heat sealing area.

2. The battery device according to claim 1, wherein: The heat pressing area further includes a non-heat sealing area, and the non-heat sealing area and the flow channel area are respectively located on both sides of the heat sealing area.

3. The battery device according to claim 1, wherein: The width of the heat-sealing area is 0.5 mm to 30 mm.

4. The battery device according to claim 3, characterized in that The width of the heat-sealing area is 2mm-3mm.

5. The battery device according to claim 2, wherein: The non-heat-sealable area includes a closed area, and the flow channel region surrounds the closed area.

6. The battery device according to claim 5, characterized in that The closed area includes a first sub-area, the first sub-area extends along a first direction, a size of the first sub-area in a second direction is D, 1mm≤D≤50mm, and the first direction is perpendicular to the second direction.

7. The battery device according to claim 6, characterized in that The non-heat-sealable area further includes a second sub-area extending along a second direction. The size of the second sub-area in the first direction is D, and 1 mm ≤ D ≤ 50 mm.

8. The battery device according to claim 5, characterized in that At least part of the closed area is provided with an arc-shaped area at its end along the extension direction.

9. The battery device according to claim 8, characterized in that The radius of the arc-shaped area is R, 4mm≤R≤30mm.

10. The battery device according to claim 9, characterized in that 8mm≤R≤20mm.

11. The battery device according to claim 8, characterized in that The closed area includes a main area and an arc area, the main area extends along a first direction, the arc area is provided at at least one end of the main area along the first direction, the size of the main area in the second direction is D, the radius of the arc area is R, R≥D / 2, and the first direction is perpendicular to the second direction.

12. The battery device according to claim 11, wherein: The main body area is smoothly connected to the arc area.

13. The battery device according to claim 8, characterized in that The central angle corresponding to the arc-shaped area is greater than or equal to 180°.

14. The battery device according to any one of claims 1 to 13, characterized in that: The at least two flexible members are configured as metal plasticized films.

15. The battery device according to claim 14, characterized in that The at least two flexible members are configured as aluminum-plastic films.

16. The battery device according to any one of claims 1 to 13, characterized in that: The flexible member is a layered structure, comprising a metal layer and a non-metal layer, wherein the metal layer and the non-metal layer are stacked in sequence.

17. The battery device according to claim 16, characterized in that The metal layer includes one of aluminum foil, copper foil and steel foil.

18. The battery device according to claim 16, wherein: The non-metallic layer includes one of polypropylene, polyvinyl chloride and polyethylene.

19. The battery device according to claim 16, wherein: The non-metallic layer is a hot-melt layer.

20. The battery device according to any one of claims 1 to 13, characterized in that: The flexible member is a layered structure, and includes a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged in sequence. The waterproof layer is closer to the flow channel area than the corrosion-resistant layer.

21. The battery device according to claim 20, characterized in that The thickness of the isolation layer is 6.5 μm-100 μm.

22. The battery device according to claim 21, characterized in that The thickness of the isolation layer is 6.5 μm-15 μm.

23. The battery device according to claim 20, characterized in that The thickness of the corrosion-resistant layer is 5 μm-20 μm.

24. The battery device according to claim 20, wherein: The thickness of the waterproof layer is 50 μm-120 μm.

25. The battery device according to any one of claims 1 to 13, characterized in that: The thickness of the flexible member is 0.05mm-0.3mm.

26. The battery device according to claim 25, characterized in that The thickness of the flexible member is 0.08 mm to 0.2 mm.

27. The battery device according to any one of claims 1 to 13, characterized in that: The elastic modulus of the flexible member is 0.1 MPa-10000 MPa.

28. A heat exchange component, characterized in that: The heat exchange component is the heat exchange component of the battery device according to any one of claims 1 to 27, and the heat exchange component is used to exchange heat with the battery cell assembly.

29. An electrical device, characterized in that: The method comprises the battery device according to any one of claims 1 to 27 or the heat exchange component according to claim 28.

30. An energy storage device, characterized in that: The method comprises the battery device according to any one of claims 1 to 27 or the heat exchange component according to claim 28.

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