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

Abstract

A heat exchange assembly (30), a battery apparatus (100), an electric device, and an energy storage device. The battery apparatus (100) comprises a case assembly (20), a battery cell assembly (10), and a heat exchange assembly (30). The battery cell assembly (10) is arranged in the case assembly (20). The heat exchange assembly (30) is arranged in the case assembly (20). The heat exchange assembly (30) comprises at least two flexible members (31), and the at least two flexible members (31) are stacked. The at least two flexible members (31) form a heat-sealed region (34) and a flow channel region (32) by means of hot pressing. The flow channel region (32) is used for conducting a heat exchange medium so as to perform heat exchange on the battery cell assembly (10). The heat-sealed region (34) comprises a non-heat-sealed region (37), and the at least two flexible members (31) are connected to each other in the heat-sealed region (34).

Description

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

[0001] This disclosure relates to the field of battery technology, and in particular to a heat exchange component, battery device, electrical equipment, and energy storage device. Background Technology

[0002] This section is intended to provide background or context for embodiments of this disclosure. The description herein is not intended to imply that it is prior art simply because it is included in this section.

[0003] In battery-powered new energy vehicles, the battery can provide all or part of the power. During battery use, the individual battery cells generate heat. If this heat is too high, it will adversely affect the battery's performance and lifespan. Therefore, how to effectively dissipate heat from the battery cells has become an important research direction in this field.

[0004] Summary of the Invention

[0005] In view of this, the present disclosure aims to provide a heat exchange component, a battery device, an electrical device, and an energy storage device to solve the technical problem of how to improve the heat exchange effect.

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

[0007] Enclosure assembly;

[0008] A battery cell assembly is disposed within the housing assembly;

[0009] A heat exchange assembly is disposed within the housing assembly; wherein the heat exchange assembly includes at least two flexible elements, which are stacked together, and the at least two flexible elements are hot-pressed to form a heat-sealing area and a flow channel area;

[0010] The flow channel region is used to conduct heat exchange medium to exchange heat with the battery cell assembly; the heat sealing region includes a heat sealing area, and the at least two flexible members are interconnected within the heat sealing area.

[0011] The battery device provided in this disclosure includes a housing assembly, battery cell assemblies, and a heat exchange assembly. The battery cell assemblies are disposed within the housing assembly, which protects them. The heat exchange assembly exchanges heat with the battery cell assemblies. On one hand, the heat exchange assembly is made of a flexible component, which is lightweight, reducing the overall weight of the battery device, lowering production costs, and improving energy density. On the other hand, by making the flexible component a flexible structure, the heat exchange assembly can fit better with the housing assembly and / or battery cell assemblies, thus absorbing assembly tolerances and eliminating the need for sealants or thermally conductive materials. This improves the fit between the heat exchange assembly and the housing assembly and / or battery cell assemblies, increasing the effective heat exchange area and improving heat exchange efficiency and effect. Furthermore, the flexible component is hot-pressed to form a heat-sealing area and a flow channel area, with the flow channel area used to conduct the heat exchange medium; this molding method is simple.

[0012] In some embodiments, the heat-sealing zone further includes a non-heat-sealing zone, and the non-heat-sealing zone and the heat exchange channel are located on opposite sides of the heat-sealing zone.

[0013] By incorporating a non-heat-sealed zone within the heat-sealing zone, with the non-heat-sealed zone and heat exchange channels located on opposite sides of the heat-sealing zone, the width of the heat-sealing zone is reduced. This mitigates the problem of excessively wide heat-sealing zones leading to overheating, which can negatively impact hot-pressing quality and damage to flexible components. Furthermore, the non-heat-sealed zone acts as a buffer zone for stress release during flexible component folding, reducing stress concentration and potential damage to the heat-sealing zone.

[0014] In some embodiments, the width of the heat-sealing zone is 0.5mm-30mm.

[0015] 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 component, 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 an excessively wide heat-sealing area, which affects the hot pressing quality and damages the flexible component.

[0016] In some embodiments, the width of the heat-sealed area is 2mm-3mm.

[0017] In this embodiment, it is beneficial to further improve the problem of excessively high temperature caused by an excessively wide heat-sealing zone, which affects the hot-pressing quality and damages the flexible component.

[0018] In some embodiments, the non-heat-sealed area includes a closed area, and the flow channel region surrounds the closed area.

[0019] In this embodiment, by surrounding the closed area with the flow channel area, i.e. forming a closed area between the flow channel areas, the width of the heat-sealing area can be controlled. In other words, by setting the closed area, the reliability of the heat-sealing area can be improved, and the problem of excessively high temperature caused by an excessively wide heat-sealing area, which affects the hot pressing quality and damages the flexible parts can also be mitigated.

[0020] In some embodiments, the enclosed region includes a first sub-region extending along a first direction, the first sub-region having a dimension D in a second direction, where 1mm ≤ D ≤ 50mm, and the first direction being perpendicular to the second direction.

[0021] When D ≥ 1 mm, adjacent heat-sealing zones can be separated, which helps to improve the situation where the heat-sealing zone is too wide due to overlap, thus mitigating the problem of excessively wide heat-sealing zones leading to excessively high temperatures, affecting heat-sealing quality, and damaging flexible components. When D ≤ 50 mm, it helps to control the spacing between adjacent flow channel areas, thereby improving heat exchange efficiency and effect. Therefore, when 1 mm ≤ D ≤ 50 mm, both heat-sealing quality and heat exchange efficiency can be balanced, making the heat exchange component more practical.

[0022] In some embodiments, the non-heat-sealed area further includes a second sub-region extending along a second direction, the second sub-region having a dimension D in the first direction, where 1mm ≤ D ≤ 50mm.

[0023] When D ≥ 1 mm, adjacent heat-sealing zones can be separated, which helps to improve the situation where the heat-sealing zone is too wide due to overlap, thus mitigating the problem of excessively wide heat-sealing zones leading to excessively high temperatures, affecting heat-sealing quality, and damaging flexible components. When D ≤ 50 mm, it helps to control the spacing between adjacent flow channel areas, thereby improving heat exchange efficiency and effect. Therefore, when 1 mm ≤ D ≤ 50 mm, both heat-sealing quality and heat exchange efficiency can be balanced, making the heat exchange component more practical.

[0024] In some embodiments, at least a portion of the enclosed region has an arcuate region at its end along the extension direction.

[0025] 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 helps to improve the problem of overlapping heat-sealing areas at the end of the closed area, and 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 heat-sealing area failure caused by stress concentration and improving the hot pressing quality.

[0026] In some embodiments, the radius of the arc-shaped region is R, where 4mm ≤ R ≤ 30mm.

[0027] When R ≥ 4mm, adjacent heat-sealing zones can be separated, which helps to mitigate the problem of excessively wide hot-pressing areas due to overlap. This improves the issue of excessively wide heat-sealing zones leading to overheating, affecting hot-pressing quality and damaging flexible components. Furthermore, it avoids stress concentration caused by right angles at the ends of the sealed areas, thus preventing heat-sealing zone failure and improving hot-pressing quality. When R ≤ 30mm, it helps to control the spacing between adjacent flow channel areas, thereby improving heat exchange efficiency and effect. Therefore, when 4mm ≤ R ≤ 30mm, both hot-pressing quality and heat exchange efficiency can be balanced, making the heat exchange component more practical.

[0028] In some embodiments, 8mm ≤ R ≤ 20mm.

[0029] When 8mm≤R≤20mm, the hot pressing quality and heat exchange efficiency can be further improved, making the heat exchange components more practical.

[0030] In some embodiments, the enclosed area includes a main body region and an arc-shaped region. The main body region extends along a first direction, and the arc-shaped region is provided at at least one end of the main body region along the first direction. The main body region has a dimension D in a second direction, and the radius of the arc-shaped region is R, where R ≥ D / 2. The first direction is perpendicular to the second direction.

[0031] In this embodiment, when R≥D / 2, adjacent heat-sealing areas can be separated, which helps to improve the situation where the heat-sealing area has a large hot-pressing width due to overlap. This improves the problem of excessively wide heat-sealing areas causing excessively high temperatures, affecting hot-pressing quality and damaging flexible parts. It also avoids the problem of stress concentration due to right angles at the ends of the closed area, thus improving the problem of heat-sealing area failure caused by stress concentration and further improving hot-pressing quality.

[0032] In some embodiments, the main body region and the arcuate region are smoothly connected.

[0033] The smooth connection between the main body area and the arc-shaped area refers to the smooth transition between the main body area and the arc-shaped area through a circular arc, which further improves the problem of heat-sealing zone failure caused by stress concentration and further improves the hot-pressing quality.

[0034] In some embodiments, the central angle corresponding to the arc-shaped region is greater than or equal to 180°.

[0035] The central angle corresponding to the arc-shaped region is greater than or equal to 180°, which means that the area corresponding to the arc-shaped region is greater than or equal to a semicircle. This helps to further improve the problem of stress concentration.

[0036] In some embodiments, the at least two flexible elements are configured as metal plasticized films.

[0037] In this embodiment, because the metal plasticized film is thin and lightweight, and because a flow channel region is formed between at least two metal plasticized films, it is not affected by the extrusion process and does not need to meet a large thickness requirement. Therefore, the overall thickness and weight of the heat exchange assembly can be reduced. Furthermore, the heat exchange assembly does not react with the internally flowing heat exchange medium, thus eliminating the risk of corrosion and leakage.

[0038] In some embodiments, the at least two flexible elements are configured as aluminum-plastic films.

[0039] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0040] In some embodiments, the flexible element is a layered structure, comprising a metal layer and a non-metal layer, wherein the metal layer and the non-metal layer are stacked sequentially.

[0041] In this embodiment, the flexible component, composed of sequentially stacked metal and non-metal layers, is thin and lightweight. Furthermore, by forming a flow channel region between at least two flexible components, it is unaffected by the extrusion process and does not need to meet large thickness requirements, thus reducing the overall thickness and weight of the heat exchange assembly. In addition, the heat exchange assembly does not react with the internally flowing heat exchange medium, therefore eliminating the risk of corrosion and leakage.

[0042] In some embodiments, the metal layer includes one or more of aluminum foil, copper foil, and steel foil.

[0043] This allows flexible components to have a certain structural strength and to serve as an isolation mechanism.

[0044] In some embodiments, the non-metallic layer includes one or more of polypropylene, polyvinyl chloride, and polyethylene.

[0045] This allows flexible components to have a certain degree of waterproofing.

[0046] In some embodiments, the non-metallic layer is a hot-melt layer.

[0047] Here, by setting the non-metallic layer as a hot-melt layer, that is, a hot-melt material, it is advantageous to combine the non-metallic layer and the metallic layer together through hot melting, which is simple to form and has high production efficiency.

[0048] In some embodiments, the flexible element has a layered structure, comprising a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged sequentially, wherein the waterproof layer is closer to the flow channel region than the corrosion-resistant layer.

[0049] In this embodiment, by configuring the flexible component to include a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged sequentially, the waterproof layer is closer to the flow channel area than the corrosion-resistant layer, which helps to improve the reliability of the heat exchange component.

[0050] In some embodiments, the thickness of the isolation layer is 6.5 μm-100 μm.

[0051] In this embodiment, by setting the thickness of the isolation layer to 6.5μm-100μm, the flexible component can have a certain structural strength and flexibility.

[0052] In some embodiments, the thickness of the isolation layer is 6.5 μm-15 μm.

[0053] In this embodiment, by setting the thickness of the isolation layer to 6.5μm-15μm, the flexible component can be further made to have a certain structural strength and flexibility.

[0054] In some embodiments, the thickness of the corrosion-resistant layer is 5 μm-20 μm.

[0055] In this embodiment, by setting the thickness of the corrosion-resistant layer to 5μm-20μm, the wear resistance and toughness of the flexible component can be improved.

[0056] In some embodiments, the thickness of the waterproof layer is 50μm-120μm.

[0057] In this embodiment, by setting the thickness of the waterproof layer to 50μm-120μm, the waterproof layer can have a certain structural strength, improve the waterproof performance, and facilitate the hot pressing connection of flexible components through the waterproof layer.

[0058] In some embodiments, the thickness of the flexible element is 0.05mm-0.3mm.

[0059] By setting the thickness of the flexible component to 0.05mm-0.3mm, the heat exchange assembly made of the flexible component has a certain structural strength while making the overall thickness of the heat exchange assembly small. This helps to reduce the overall volume and weight of the battery, thereby increasing the energy density of the battery.

[0060] In some embodiments, the thickness of the flexible element is 0.08 mm to 0.2 mm.

[0061] By setting the thickness of the flexible component to 0.08mm-0.2mm, the heat exchange assembly made of the flexible component has a certain structural strength, while further reducing the overall thickness of the heat exchange assembly. This is beneficial to further reduce the overall volume and weight of the battery, thereby further increasing the energy density of the battery.

[0062] In some embodiments, the elastic modulus of the flexible element is 0.1 MPa-10000 MPa.

[0063] In this embodiment, by setting the elastic modulus of the flexible component to 0.1MPa-10000MPa, the flexible component has a certain structural strength, which improves the reliability of the heat exchange assembly and also has a certain deformation capacity. This can improve the fit between the heat exchange assembly and the housing assembly and / or the battery assembly and battery cell assembly, thereby increasing the effective heat exchange area between the heat exchange assembly and the housing assembly and / or the battery assembly and battery cell assembly, thus improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly.

[0064] A second aspect of this disclosure provides a heat exchange component, which is the heat exchange component of the battery device described above, and the heat exchange component is used to exchange heat with the battery cell assembly.

[0065] The heat exchange assembly provided in this disclosure is used for heat exchange with a battery cell assembly. On one hand, the heat exchange assembly is made of a flexible component, which is lightweight, thus reducing the weight of the battery device, lowering the production cost of the heat exchange assembly, and improving the energy density of the battery device. On the other hand, by setting the flexible component as a flexible structure, the heat exchange assembly can better fit with the housing assembly and / or battery cell assembly, thereby facilitating the absorption of assembly tolerances and eliminating the need for sealants or thermally conductive materials. This improves the fit between the heat exchange assembly and the housing assembly and / or battery cell assembly, increasing the effective heat exchange area between them, thereby improving the heat exchange efficiency and effect. Furthermore, the flexible component is hot-pressed to form a heat-sealing area and a flow channel area, with the flow channel area used to conduct the heat exchange medium; this molding method is simple.

[0066] A third aspect of this disclosure provides an electrical device, including the battery device or the heat exchange component described above.

[0067] The battery device of the electrical equipment provided in this disclosure includes a housing assembly, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is disposed within a first receiving cavity of the housing assembly, and the housing assembly protects the battery cell assembly. The heat exchange assembly is used for heat exchange with the battery cell assembly. On one hand, the heat exchange assembly is made of a flexible component, which is lightweight, thus reducing the weight of the battery device, lowering the production cost of the heat exchange assembly, and improving the energy density of the battery device. On the other hand, by setting the flexible component as a flexible structure, the heat exchange assembly can fit better with the housing assembly and / or the battery cell assembly, thereby facilitating the absorption of assembly tolerances of the heat exchange assembly. It eliminates the need for sealants or thermally conductive materials, improving the fit between the heat exchange assembly and the housing assembly and / or the battery cell assembly, increasing the effective heat exchange area between the heat exchange assembly and the housing assembly and / or the battery cell assembly, and thus improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly. Furthermore, the flexible component is hot-pressed to form a heat-sealing area and a flow channel area. The flow channel area is used to conduct the heat exchange medium; this molding method is simple.

[0068] A fourth aspect of this disclosure provides an energy storage device, including the battery device or the heat exchange component described above.

[0069] The battery device of the energy storage device provided in this disclosure includes a housing assembly, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is disposed within a first receiving cavity of the housing assembly, and the housing assembly protects the battery cell assembly. The heat exchange assembly is used for heat exchange with the battery cell assembly. On one hand, the heat exchange assembly is made of a flexible component, which is lightweight, thus reducing the weight of the battery device, lowering the production cost of the heat exchange assembly, and improving the energy density of the battery device. On the other hand, by setting the flexible component as a flexible structure, the heat exchange assembly can fit better with the housing assembly and / or the battery cell assembly, thereby facilitating the absorption of assembly tolerances of the heat exchange assembly. It eliminates the need for sealants or thermally conductive materials, improving the fit between the heat exchange assembly and the housing assembly and / or the battery cell assembly, increasing the effective heat exchange area between the heat exchange assembly and the housing assembly and / or the battery cell assembly, and thus improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly. Furthermore, the flexible component is hot-pressed to form a heat-sealing area and a flow channel area. The flow channel area is used to conduct the heat exchange medium; this molding method is simple. Attached Figure Description

[0070] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of this disclosure;

[0071] Figure 2 is an exploded perspective view of a battery device provided in an embodiment of the present disclosure, wherein the heat exchange component is disposed in the second receiving cavity;

[0072] Figure 3 is a cross-sectional view of a battery device provided in an embodiment of this disclosure;

[0073] Figure 4 is an enlarged view of point A in Figure 3;

[0074] Figure 5 is a schematic diagram of the connection structure between the heat exchange component and the bottom cover plate provided in an embodiment of the present disclosure;

[0075] Figure 6 is a schematic diagram of the structure of a heat exchange component provided in an embodiment of this disclosure;

[0076] Figure 7 is a schematic diagram of the structure of a bottom protective plate provided in an embodiment of the present disclosure;

[0077] Figure 8 is a schematic diagram of the structure of a heat exchange component provided in another embodiment of this disclosure;

[0078] Figure 9 is an enlarged view of point B in Figure 8.

[0079] Explanation of reference numerals in the attached drawings: 10. Battery cell assembly; 11. Battery cell; 20. Housing assembly; 21. Housing body; 211. First housing section; 212. Second housing section; 22. Bottom protective plate; 221. Connecting part; 222. Limiting structure; 23. First receiving cavity; 24. Second receiving cavity; 30. Heat exchange assembly; 31. Flexible component; 32. Flow channel area; 33. Clearance hole; 34. Heat-sealed area; 35. Inlet; 36. Outlet; 37. Non-heat-sealed area; 38. Closed area; 381. First sub-area; 382. Second sub-area; 383. Main body area; 384. Arc-shaped area; 39. Open area; 100. Battery device; 200. Controller; 300. Motor; 1000. Vehicle. Detailed Implementation

[0080] Unless otherwise specified, all embodiments and optional embodiments of this disclosure can be combined to form new technical solutions.

[0081] Unless otherwise specified, all technical features and optional technical features of this disclosure can be combined to form new technical solutions.

[0082] With the development of clean energy, more and more devices are using electricity as their driving force, leading to the rapid development of power batteries, such as lithium-ion batteries, which can store a large amount of electrical energy and can be repeatedly charged and discharged. These power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields.

[0083] In this embodiment of the disclosure, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0084] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments disclosed herein are not limited to this.

[0085] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0086] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0087] In some implementations, the electrode assembly is a stacked structure.

[0088] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0089] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0090] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0091] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0092] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

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

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

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

[0096] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This disclosure does not impose any particular limitations.

[0097] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also have one or more.

[0098] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0099] In some embodiments, energy storage devices include energy storage containers, energy storage cabinets, etc.

[0100] Power plants are demanding increasingly higher energy density from the surface area of ​​energy storage containers. Consequently, to increase power output, the weight of these containers also increases. However, these containers need to be transported from the production site to the usage site via land and / or sea transport. Land and sea transport typically have weight restrictions, creating a conflict between increasing energy density and the weight of energy storage containers.

[0101] During the use of a battery device, the individual battery cells generate heat. Excessive heat can negatively impact the performance and lifespan of the battery device. Therefore, effectively dissipating heat from the battery cells has become an important research direction in this field. Related technologies utilize a cooling system installed within the battery device housing to cool the individual battery cells. This cooling system may include multiple aluminum water-cooled plates laid within the battery device housing, with the surfaces of these plates in contact with the surfaces of the individual battery cells. During use, a heat exchange medium, such as water, flows through these water-cooled plates, carrying away heat from the battery cells and cooling them down. However, when the aluminum water-cooled plates in the cooling system do not adhere well to the surfaces of the battery cells, the heat exchange efficiency and effect are poor. Furthermore, assembly tolerance compensation and the use of sealant are required during assembly with the battery cell assembly, resulting in higher production costs. In addition, the water-cooling plate and battery pack are highly rigid and require the use of hard structural adhesive, making disassembly difficult. If self-adhesive, soft, or double-sided adhesive is used, the rigidity of the water-cooling plate and battery pack is relatively good, but when there are gaps and mismatches in flatness, there will be problems with the adhesive coming unglued.

[0102] Therefore, in order to improve the heat exchange efficiency and effect of the heat exchange assembly, this disclosure provides a battery device, which includes a housing assembly, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is disposed within the housing assembly. The heat exchange assembly is disposed within the housing assembly. The heat exchange assembly includes at least two flexible members, which are stacked. Each of the at least two flexible members includes a heat-sealing region, which is formed by hot-pressing the at least two flexible members. The heat-sealing region separates the heat exchange assembly into a flow channel region and a non-heat-sealed region. The flow channel region is used to conduct the heat exchange medium, which exchanges heat with the battery cell assembly.

[0103] The battery device provided in this disclosure includes a housing assembly, battery cell assemblies, and a heat exchange assembly. The battery cell assemblies are disposed within the housing assembly, which protects them. The heat exchange assembly exchanges heat with the battery cell assemblies. On one hand, the heat exchange assembly is made of a flexible component, which is lightweight, thus reducing the weight of the battery device, lowering production costs, and improving energy density. On the other hand, by setting the flexible component as a flexible structure, which has a certain deformation capacity, the heat exchange assembly can better fit and adapt to the housing assembly and / or battery cell assemblies. This helps to absorb assembly tolerances, improves the fit between the heat exchange assembly and the housing assembly and / or battery cell assemblies, increases the effective heat exchange area between them, and thus improves the heat exchange efficiency and effect.

[0104] Furthermore, the flexible component is sealed using a hot-pressing process, which creates a heat-sealed zone. This zone separates the heat exchange assembly into a flow channel area and a non-heat-sealed area. This molding method is simple, and the inclusion of a non-heat-sealed area helps reduce the width of the heat-sealed zone, mitigating the problem of excessively wide heat-sealed zones leading to overheating, which affects hot-pressing quality and can damage the flexible component. Additionally, the non-heat-sealed area can act as a stress-relieving buffer zone during folding of the flexible component, reducing stress concentration and preventing damage to the heat-sealed zone.

[0105] The technical solutions described in this disclosure are applicable to electrical devices that use battery devices. The electrical devices include battery devices according to any embodiment of this disclosure, and the battery devices are used to provide electrical energy.

[0106] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This disclosure does not impose any special limitations on the above-mentioned electrical equipment.

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

[0108] Referring to Figure 1, a controller 200, a motor 300, and a battery device 100 can be installed inside the vehicle 100. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 can be installed at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000. For example, the battery device 100 can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 1000. In another embodiment of this disclosure, the battery device 100 can not only serve as the operating power source for the vehicle 1000 but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0109] Referring to Figure 2, to meet different power demands, the battery device 100 includes a battery cell assembly 10, which may include multiple battery cells 11. A battery cell 11 is the smallest unit that makes up a module or package of the battery device 100. Multiple battery cells 11 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 11 are connected in both series and parallel connections. Multiple battery cells 11 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 11 is housed within a housing assembly 20. Alternatively, the battery device 100 can also be composed of multiple battery cells 11 first connected in series, parallel, or in a mixed configuration to form a battery device 100 module, and then these modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing assembly 20. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 11. Each battery cell 11 can be a secondary battery device 100 or a primary battery device 100; it can also be a lithium-sulfur battery device 100, a sodium-ion battery device 100, or a magnesium-ion battery device 100, but is not limited to these. The battery cell 11 can be cylindrical, flat, cuboid, or other shapes.

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

[0111] Referring to Figure 2, the battery device 100 includes a housing assembly 20 and a battery cell assembly 10. The battery cell assembly 10 includes at least one battery cell 11, which is disposed within the first receiving cavity 23 of the housing assembly 20.

[0112] The enclosure component 20 can be a simple three-dimensional structure such as a cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres. The material of the enclosure component 20 can be an alloy material such as aluminum alloy or iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

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

[0114] Please refer to Figures 2 to 9. This disclosure provides a heat exchange component 30, which is the heat exchange component 30 of the battery device 100 provided in this 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 disposed inside the first receiving cavity 23 of the housing component 20, that is, it can be in direct contact with the battery cell component 10, or it can be disposed outside the first receiving cavity 23, and heat is transferred through an 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 being set inside the housing assembly 20 means that the heat exchange component 30 can be set inside the first receiving cavity 23, that is, it can be in direct contact with the battery cell assembly 10 to improve heat exchange efficiency, or it can be set outside the first receiving cavity 23, and heat is transferred through an intermediate medium, thereby realizing heat exchange between the heat exchange component 30 and the battery cell assembly 10.

[0117] The heat exchange assembly 30 includes at least two flexible elements 31, meaning that the number of flexible elements 31 included in the heat exchange assembly 30 can be two or more.

[0118] Here, the flexibility in flexible component 31 refers to the material properties of the structure. This type of property can be due to the material's light weight, or it can be due to at least one of the material's properties such as thickness, stiffness, strength, and elastic modulus. As an example, the material of flexible component 31 can be selected as a material that is lighter than conventional aluminum plates, steel plates, etc., and its flexibility can be controlled by the thickness, width, length, and type of material of flexible component 31. By setting the heat exchange assembly 30 in the form of flexible component 31 in this embodiment, it is beneficial to reduce the weight of heat exchange assembly 30.

[0119] In some embodiments, at least two flexible elements 31 form a heat-sealing area and a flow channel area 32 by hot pressing. The heat-sealing area also includes a non-heat-sealing area 37, and the non-heat-sealing area 37 and the heat exchange flow channel 32 are located on both sides of the heat-sealing area 34.

[0120] At least two flexible elements 31 include a heat-sealing region 34, which is constructed by hot pressing the at least two flexible elements 31 together. The heat-sealing region 34 separates the heat exchange assembly 30 into a flow channel region 32 and a non-heat-sealing region 37. This means that the flexible elements 31 are hot-pressed to form the flow channel region 32 and the non-heat-sealing region 37. In other words, the heat-sealing region 34 separates the flow channel region 32 and the non-heat-sealing region 37.

[0121] The heat exchange medium flows within the flow channel region 32 to exchange heat 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 achieve a cooling effect on the battery cell 11, such as being gaseous or liquid. In this embodiment, a coolant is used as an example for description.

[0123] For example, the heat exchange assembly 30 also includes an inlet 35 and an outlet 36, both of which are connected to the flow channel region 32.

[0124] Here, the inlet 35 and outlet 36 of the heat exchange component 30 are used for connecting to the air conditioning system of the vehicle or electrical equipment or liquid storage devices such as water tanks.

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

[0126] The "multiple" mentioned in the embodiments of this disclosure refers to two or more items.

[0127] The principle of heat exchange component 30 for heat exchange of battery cell assembly 10 is as follows: the heat exchange medium output from the heat exchange medium source (not shown in the figure) enters the 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, thus completing the heat exchange of the battery cell assembly 10.

[0128] Here, the heat exchange component 30 can exchange heat with the battery cell assembly 10 by either dissipating heat from the battery cell assembly 10 or by heating the battery cell assembly 10.

[0129] The principle of heat exchange component 30 for heat dissipation of battery cell assembly 10 is as follows: the heat exchange medium output from the heat exchange medium source enters the 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 battery cell assembly 10, the heat exchange medium flows out through the outlet 36 of the heat exchange component 30, releasing the heat and completing the cooling and heat dissipation of 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 from 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, thus completing the heating of the battery cell assembly 10.

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

[0132] It should be noted that the flexible component 31 can be conductive, which is beneficial for maintaining an equipotential setting with the housing assembly 20; the flexible component 31 can also be electrically insulating, eliminating the need for insulation treatment, which helps reduce the leakage risk and production cost of the battery device 100, thereby improving the reliability of the battery device 100.

[0133] The battery device provided in this embodiment includes a housing assembly 20, a battery cell assembly 10, and a heat exchange assembly 30. The battery cell assembly 10 is disposed within the 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 component 31, which is lightweight and helps to reduce the weight of the battery device 100, lower the production cost of the heat exchange component 30, and improve the energy density of the battery device 100. On the other hand, by setting the flexible component 31 as a flexible structure, the flexible structure has a certain deformation capability, which allows the heat exchange component 30 to fit and adapt better with the housing component 20 and / or the battery cell component 10. This helps to absorb the assembly tolerance of the heat exchange component 30, improve the fit between the heat exchange component 30 and the housing component 20 and / or the battery cell component 10, increase the effective heat exchange area between the heat exchange component 30 and the housing component 20 and / or the battery cell component 10, and thus improve the heat exchange efficiency and heat exchange effect of the heat exchange component 30.

[0134] Furthermore, the flexible component 31 is hot-pressed to form a heat-sealing area and a flow channel area 32. The flow channel area 32 is used to conduct the heat exchange medium. This forming method is simple. The heat-sealing area is supplemented by a non-heat-sealing area 37, which is located on both sides of the heat-sealing area 34. This helps to reduce the width of the heat-sealing area 34 and improve the problem of excessively high temperature caused by an overly wide heat-sealing area 34, which affects the hot-pressing quality and damages the flexible component 31. In addition, the non-heat-sealing area 37 can also form a stress-relieving buffer when the flexible component 31 is folded, which improves the situation where stress concentration occurs in the heat-sealing area 34 and causes damage to the heat-sealing area 34.

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

[0136] Of course, in other embodiments, please refer to FIG2, the heat exchange assembly 30 may be disposed outside the first receiving cavity 23.

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

[0138] In related technologies, heat exchange components and battery cell components are placed in the same space, which helps to ensure heat exchange efficiency. However, when the battery cell components are under very abnormal conditions, the heat exchange medium in the cooling system may leak. The leaked heat exchange medium increases the risk of short circuit in the battery cell components inside the battery pack to a certain extent, affecting the reliability of the battery pack.

[0139] In this embodiment, by providing a heat exchange component 30 on the outside of the first receiving cavity 23, the heat exchange component 30 is separated from the battery cell assembly 10, reducing the risk of the heat exchange medium of the heat exchange component 30 coming into contact with the battery cell assembly 10 after leakage, thereby reducing the risk of short circuit of the battery device 100 and improving the reliability of the battery device 100.

[0140] The housing assembly 20 is used to house the battery cell assembly 10, and the housing assembly 20 can have various structures. In some embodiments, referring again to FIG2, the housing assembly 20 includes a housing body 21, which may include a first housing portion 211 and a second housing portion 212. The first housing portion 211 and the second housing portion 212 cover each other, and the first housing portion 211 and the second housing portion 212 together define a first receiving cavity 23 for housing the battery cell assembly 10. The second housing portion 212 may be a hollow structure with one end open, and 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 a housing body 21 with the first receiving cavity 23; the first housing portion 211 and the second housing portion 212 may also be hollow structures with one side open, and the open side of the first housing portion 211 covers the open side of the second housing portion 212 to form a housing body 21 with the first receiving cavity 23. Of course, the first box portion 211 and the second box portion 212 can be of various shapes, such as cylinders, cuboids, etc.

[0141] To improve the sealing performance after the first housing part 211 and the second housing part 212 are connected, a sealing element, such as sealant or sealing ring, can also be provided between the first housing part 211 and the second housing part 212.

[0142] Assuming that the first box part 211 covers the top of the second box part 212, the first box part 211 can also be called the upper box cover, and the second box part 212 can also be called the lower box cover.

[0143] In other embodiments, referring again to Figure 2, the housing assembly 20 may also be configured to include a housing body 21 and a bottom protective plate 22, depending on requirements. A second receiving cavity 24 is formed between the bottom protective plate 22 and the outer side wall of the housing body 21. A heat exchange assembly 30 is disposed within the second receiving cavity 24.

[0144] It should be noted that the bottom guard plate 22 can be located at the bottom of the box body 21, in which case the bottom guard plate 22 is, for example, a bottom guard plate 22. The bottom guard plate 22 can also be located 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 impact of external debris on the box body 21 during driving, thereby improving the reliability of the battery cell assembly 10.

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

[0146] Here, the provision of heat exchange component 30 in the second receiving cavity 24 means that the heat exchange component 30 can be provided only in the second receiving cavity 24, or the heat exchange component 30 can be provided in other areas besides the second receiving cavity 24.

[0147] A second receiving cavity 24 is formed between the bottom protective plate 22 and the second housing part 212, that is, the first receiving cavity 23 and the second receiving cavity 24 are separated.

[0148] Here, by setting the bottom protective plate 22, it can not only protect the housing assembly 20 and the battery cell 11, but also support and protect the heat exchange assembly 30.

[0149] The heat exchange component 30 is disposed in the second receiving cavity 24, that is, the heat exchange component 30 is disposed outside the first receiving cavity 23, so as to separate the heat exchange component 30 from the battery cell assembly 10, avoid the heat exchange medium of the heat exchange component 30 from contacting the battery cell assembly 10, thereby preventing the battery device 100 from short-circuiting and improving the reliability of the battery device 100.

[0150] In this embodiment, a bottom protective plate 22 is provided on the outside of the housing body 21, defining a second receiving cavity 24 between the bottom protective plate 22 and the second housing part 212. A heat exchange assembly 30 is disposed within the second receiving cavity 24 for heat exchange with the housing body 21, thereby achieving heat exchange for the battery cell assembly 10 carried within the housing body 21. In other words, by placing the heat exchange assembly 30 on the outside of the first receiving cavity 23 of the housing assembly 20, the problem of short circuit in the battery device 100 due to leakage of the heat exchange medium of the heat exchange assembly 30 can be avoided to a certain extent, improving the reliability of the battery device 100 and increasing the utilization rate of the internal receiving cavity of the housing assembly 20, thus improving the compactness of the battery device 100. On the other hand, by providing the bottom protective plate 22, which cooperates with the housing body 21 to connect and protect the battery cell assembly 10, the reliability of the housing assembly 20 is further improved.

[0151] In some embodiments, as shown in Figures 2 to 7, a portion of the bottom protective plate 22 protrudes to form a connecting portion 221, which is sealed to the second housing portion 212.

[0152] For example, the bottom guard plate 22 may be the outermost ring protruding to form a ring of connecting portions 221.

[0153] The specific manner in which the connecting part 221 is connected to the second housing part 212 is not limited here. For example, the connecting part 221 and the second housing part 212 are fastened together by bolts, screws or rivets.

[0154] In this embodiment, by forming a protruding connecting portion 221, a second receiving cavity 24 is defined between the bottom protective plate 22 and the second housing portion 212, while simultaneously connecting with the second housing portion 212. Furthermore, the sealing connection between the connecting portion 221 and the second housing portion 212 effectively prevents mud, sand, or water from entering the second receiving cavity 24, thus protecting the heat exchange assembly 30 within the second receiving cavity 24.

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

[0156] For example, the seal is a sealing strip.

[0157] In this embodiment, by providing a sealing element and clamping it between the connecting part 221 and the second housing part 212, the sealing element is used to seal the gap between the connecting part 221 and the second housing part 212, which further helps to prevent mud or water from entering the second receiving cavity 24 and improves the sealing performance between the bottom guard plate 22 and the second housing part 212; at the same time, it can also reduce the occurrence of liquid leakage from the heat exchange assembly 30.

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

[0159] Here, "the limiting structure 222 is used to support the flexible member 31 and / or the second housing portion 212" means that the limiting structure 222 abuts against the flexible member 31 and / or the second housing portion 212, providing a certain supporting force to the flexible member 31 and / or the second housing portion 212. That is to say, the limiting structure 222 can be used to support the flexible member 31, or it can be used to support the second housing portion 212, or it can be used to support both the flexible member 31 and the second housing portion 212.

[0160] It should be noted that the bottom guard plate 22 protrudes in a certain area to form a limiting structure 222. This can mean that the side of the bottom guard plate 22 away from the box body 21 is recessed, so that the side of the bottom guard plate 22 facing the box body 21 protrudes to form a limiting structure 222; or the side of the bottom guard plate 22 away from the box body 21 is not recessed, and the side of the bottom guard plate 22 facing the box body 21 is thickened and protrudes to form a limiting structure 222.

[0161] The limiting structure 222 is used to support the flexible member 31 and / or the second housing part 212 so that a fixed space is formed between the bottom guard plate 22 and the second housing part 212, which helps to improve the reliability of the battery device 100.

[0162] In this embodiment, the bottom protective plate 22 is provided with a limiting structure 222 to support the flexible member 31 and / or the second housing part 212. This helps to improve the problem of deformation of the second housing part 212 due to insufficient support strength under pressure. This can improve the problem of the second housing part 212 directly contacting the heat exchange component 30 and causing the heat exchange component 30 to collapse. This helps 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 abuts the flexible member 31 against the second housing portion 212 to support the flexible member 31 and the second housing 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 support the surface of the flexible member 31 and abut the flexible member 31 against the second housing portion 212.

[0165] In this embodiment, the flexible component 31 is abutted against the second housing part 212 by setting the limiting structure 222. While supporting the second housing part 212, the heat exchange component 30 can also be fixed, thereby improving the stability of the heat exchange component 30.

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

[0167] Here, the heat exchange component 30 is provided with a clearance hole 33, that is, the flexible component 31 is provided with a clearance hole 33, and the clearance hole 33 penetrates through the opposite sides of the heat exchange component 30 in the thickness direction.

[0168] It should be noted that the clearance hole 33 must avoid the flow channel area 32.

[0169] The specific location and number of clearance holes 33 are not limited here. They will be determined based on the specific circumstances.

[0170] For example, in an embodiment where the limiting structure 222 is used to support the second housing portion 212, the heat exchange assembly 30 may be provided with a clearance hole 33 to allow the limiting structure 222 to pass through the clearance hole 33 and abut against the second housing portion 212.

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

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

[0173] For example, the thicknesses are 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, etc.

[0174] It is understandable that by setting an appropriate width of the heat sealing zone 34, it is beneficial to ensure the sealing performance of the flow channel region 32, that is, to ensure the reliability of the flow channel region 32. It can also improve the problem that the temperature is too high due to the heat sealing zone 34 being too wide, which affects the hot pressing quality and damages 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 component 31, increase 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, which affects the hot pressing quality and damages the flexible component 31.

[0176] In some embodiments, as shown in 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 2mm-3mm, it is beneficial to further improve the problem that the temperature is too high due to the heat-sealing area 34 being too wide, which affects the hot pressing quality and damages the flexible part 31.

[0179] In some embodiments, as shown in Figures 8 and 9, the flow channel region 32 surrounds the closed region 38.

[0180] The closed area 38 is formed by the flow channel area 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 area 32.

[0181] For example, the non-heat-sealed area 37 also includes an open area 39 located inside 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 member 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 closed, but if the closed area 38 is connected to the flow channel area 32 due to process issues, it is also within the scope of protection of this disclosure.

[0183] In related technologies, if the area between adjacent flow channel regions is formed into a heat-sealing zone, the width of the heat-sealing zone will be too large, which may lead to excessively high temperature due to the excessively wide heat-sealing zone, affecting the hot pressing quality and damaging the flexible parts.

[0184] In this embodiment, by surrounding the closed area 38 with the flow channel area 32, the width of the heat-sealing area 34 can be controlled. In other words, by setting the closed area 38, the reliability of the heat-sealing area 34 can be improved, and the problem of excessively high temperature caused by the heat-sealing area 34 being too wide, affecting the hot pressing quality and damaging the flexible component 31 can also be improved.

[0185] In some embodiments, please refer to Figures 8 and 9. The closed region 38 includes a first sub-region 381, which extends along a first direction. The first sub-region 381 has a dimension D in a second direction, where 1 mm ≤ D ≤ 50 mm. The first direction is perpendicular to the second direction.

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

[0187] For example, the housing assembly 20 is typically a cuboid structure. Both the length and width directions of the housing assembly 20 are parallel to the horizontal plane, and the length direction of the housing assembly 20 is parallel to the longest side of its cuboid structure. The height direction of the housing assembly 20 is perpendicular to the ground. For example, as shown in Figures 2, 3, and 8, the length direction of the housing assembly 20 is represented by X, the width direction by Y, and the height direction by Z.

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

[0189] When D ≥ 1 mm, adjacent heat-sealing zones 34 can be separated, which helps to improve the situation where the heat-sealing zones 34 overlap and the resulting large hot-pressing width. This, in turn, mitigates the problem of excessively wide heat-sealing zones 34 leading to excessively high temperatures, affecting hot-pressing quality and damaging the flexible component 31. When D ≤ 50 mm, it helps to control the spacing between adjacent flow channel regions 32, thereby improving heat exchange efficiency and effect. Therefore, when 1 mm ≤ D ≤ 50 mm, both hot-pressing quality and heat exchange efficiency can be balanced, making the heat exchange component 30 more practical.

[0190] In some embodiments, referring to Figures 8 and 9, the non-heat-sealed area 37 further includes a second sub-region 382, ​​which extends along a second direction and has a dimension D in the first direction, where 1 mm ≤ D ≤ 50 mm.

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

[0192] Here, the first direction can be the length direction of the housing assembly 20, and the second direction can be the width direction of the housing assembly 20.

[0193] When D ≥ 1 mm, adjacent heat-sealing zones 34 can be separated, which helps to improve the situation where the heat-sealing zones 34 overlap and the resulting large hot-pressing width. This, in turn, mitigates the problem of excessively wide heat-sealing zones 34 leading to excessively high temperatures, affecting hot-pressing quality and damaging the flexible component 31. When D ≤ 50 mm, it helps to control the spacing between adjacent flow channel regions 32, thereby improving heat exchange efficiency and effect. Therefore, when 1 mm ≤ D ≤ 50 mm, both hot-pressing quality and heat exchange efficiency can be balanced, making the heat exchange component 30 more practical.

[0194] In some embodiments, as shown in Figures 8 and 9, at least a portion of the enclosed region 38 has an arcuate region 384 at its end along the extending direction.

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

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

[0197] An arc is the shape of a portion of a circle or ellipse. Any deviation or bend from a straight line or horizontal plane that causes it to appear as a circular or elliptical arc.

[0198] Of course, the flow channel region 32 can also be transitioned by a rounded arc at the corner.

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

[0200] In some embodiments, please continue to refer to Figures 8 and 9, where the radius of the arc-shaped region 384 is R, and 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 value between two of them.

[0202] When R ≥ 4 mm, adjacent heat-sealing zones 34 can be separated, which helps to improve the situation where the heat-sealing zones 34 overlap and the resulting large hot-pressing width. This improves the problem of excessively wide heat-sealing zones 34 leading to excessively high temperatures, affecting hot-pressing quality and damaging the flexible component 31. It also further avoids the problem of stress concentration caused by right angles at the ends of the closed zone 38, thus improving the problem of heat-sealing zone 34 failure due to stress concentration and improving hot-pressing quality. When R ≤ 30 mm, it helps to control the spacing between adjacent flow channel regions 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 balanced, making the heat exchange component 30 more practical.

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

[0204] R can be any one of the following values: 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 combination thereof.

[0205] When 8mm≤R≤20mm, the hot pressing quality and heat exchange efficiency can be further improved, making the heat exchange component 30 more practical.

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

[0207] In other words, the diameter of the arc-shaped region 384 is set to be larger than the size of the main body region 383 in the direction perpendicular to the extension direction.

[0208] In this embodiment, when R≥D / 2, adjacent heat-sealing areas 34 can be separated, which helps to improve the situation where the heat-sealing areas 34 overlap and the hot-pressing width of the area is too large. This improves the problem of excessively wide heat-sealing areas 34 causing excessively high temperatures, affecting the hot-pressing quality and damaging the flexible component 31. It also avoids the problem of stress concentration caused by right angles at the ends of the closed area 38, thus improving the problem of heat-sealing area 34 failure due to stress concentration and further improving the hot-pressing quality.

[0209] In some embodiments, as shown in Figures 8 and 9, the main body region 383 and the arcuate region 384 are smoothly connected.

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

[0211] In some embodiments, please continue to refer to Figures 8 and 9, the central angle corresponding to the arc region 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°, which means that the area corresponding to the arc region 384 is greater than or equal to a semicircle. This is beneficial to further improve the problem of stress concentration.

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

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

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

[0216] In this embodiment, because the metal plasticized film is thin and lightweight, and because the flow channel region 32 is formed between at least two metal plasticized films, it is not affected by the extrusion process and does not need to meet a large thickness requirement. Therefore, the overall thickness and weight of the heat exchange assembly 30 can be reduced. Simultaneously, because the metal plasticized film has insulating properties, the risk of insulation failure can be reduced. This reduces the risk of the heat exchange assembly 30 reacting with the internally flowing heat exchange medium, further reducing the risk of heat exchange medium corrosion and leakage.

[0217] For example, at least two flexible elements 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 has a layered structure, and the flexible member 31 includes a metal layer and a non-metal layer, which are stacked sequentially.

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

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

[0222] Here, there is no limit to the number of metal layers and non-metal layers.

[0223] In this embodiment, the flexible element 31, which is composed of sequentially stacked metal and non-metal layers, is thin and lightweight. Furthermore, by forming a flow channel region 32 between at least two flexible elements 31, it is unaffected by the extrusion process and does not need to meet large thickness requirements, thus reducing the overall thickness and weight of the heat exchange assembly 30. In addition, the heat exchange assembly 30 does not react with the internally flowing heat exchange medium, therefore there is no risk of corrosion or leakage.

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

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

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

[0227] By setting the non-metallic layer to one or more of polypropylene, polyvinyl chloride and polyethylene, the flexible component 31 can have a certain waterproof function.

[0228] For example, a non-metallic layer of corrosion-resistant material with acid and alkali corrosion resistance can also be selected, or additives can be added to the non-metallic layer to make the non-metallic layer resistant to acid and alkali corrosion.

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

[0231] In some embodiments, the flexible member 31 has a layered structure, and the flexible member 31 includes a corrosion-resistant layer, an isolation layer and a waterproof layer arranged sequentially, with the waterproof layer being closer to the flow channel region 32 than the corrosion-resistant layer.

[0232] Here, the corrosion-resistant layer can be a nylon layer made of nylon material, which has certain corrosion resistance properties, such as resistance to acid and alkali corrosion.

[0233] The isolation layer can be a metal layer, which can be one or more of aluminum foil, copper foil and steel foil, so that the flexible part 31 has a certain structural strength and can play an isolation role.

[0234] The waterproof layer can be a non-metallic layer, which can be one or more of polypropylene, polyvinyl chloride and polyethylene, so that the flexible part 31 can have a certain waterproof function.

[0235] In this embodiment, by setting the flexible component 31 to include a corrosion-resistant layer, an isolation layer and a waterproof layer arranged in sequence, and the waterproof layer being closer to the flow channel region 32 than the corrosion-resistant layer, the reliability of the heat exchange component 30 is improved.

[0236] In some embodiments, the thickness of the isolation layer is 6.5 μm-100 μm.

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

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

[0239] In some embodiments, the thickness of the isolation layer is 6.5 μm-15 μm.

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

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

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

[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. Point values ​​of any one of the following: 8μm, 12μm, 12.3μm, 12.5μm, 13μm, 13.5μm, 14μm, 14.5μm, 15μm, 15.5μm, 16μm, 16.5μm, 17μm, 17.5μm, 18μm, 18.5μm, 18.7μm, 19μm, 19.5μm, and 20μm, or point values ​​between any two.

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

[0245] In some embodiments, the thickness of the waterproof layer is 50μm-120μm.

[0246] The thickness of the waterproof layer can be any one of the following values ​​or any combination of two: 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 92μm, 95μm, 100μm, 105μm, 108μm, 110μm, 115μm, and 120μm.

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

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

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

[0251] In some embodiments, the thickness of the flexible element 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 element 31 to 0.08mm-0.2mm, the heat exchange component 30 made of the flexible element 31 has a certain structural strength, while further reducing the overall thickness of the heat exchange component 30. This is beneficial to further reduce the overall volume and weight of the battery device 100, thereby further increasing the energy density of the battery device 100.

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

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

[0256] The elastic modulus describes the magnitude of a unit strain caused by a unit stress when a solid is subjected to force within a certain range; it is one of the fundamental physical quantities of materials. The larger the elastic modulus, the greater the stiffness and compressive strength of the material. The elastic modulus is a physical quantity that describes the elasticity of a material.

[0257] In this embodiment, by setting the elastic modulus of the flexible component 31 to 0.1MPa-10000MPa, the flexible component 31 is made to have a certain structural strength, which improves the reliability of the heat exchange component 30, and also has a certain deformation capability. This can improve the fit between the heat exchange component 30 and the housing component 20 and / or the battery component battery cell component 10, thereby increasing the effective heat exchange area between the heat exchange component 30 and the housing 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 one specific embodiment, referring to Figures 2 to 4, the battery device includes a housing assembly 20, a battery cell assembly 10, and a heat exchange assembly 30. The housing assembly 20 has a first receiving cavity 23 inside. The battery cell assembly 10 is disposed within the first receiving cavity 23. The heat exchange assembly 30 is disposed within the housing assembly 20. The heat exchange assembly 30 includes at least two flexible members 31. Referring to Figure 3, the at least two flexible members 31 are stacked, and at least one flow channel region 32 is formed between the flexible members 31. The at least one flow channel region 32 is used to conduct a heat exchange medium, which is used to exchange heat with the battery cell assembly 10. The housing assembly 20 includes a housing body 21 and a bottom protective plate 22. The housing body 21 may include a first housing portion 211 and a second housing portion 212, which overlap each other, and the first housing portion 211 and the second housing portion 212 together define a first receiving cavity 23 for accommodating the battery cell assembly 10. A second receiving cavity 24 is formed between the bottom protective plate 22 and the outer side wall of the housing body 21. A heat exchange assembly 30 is disposed within the second receiving cavity 24. A portion of the bottom protective plate 22 protrudes to form a connecting portion 221, which is sealed to the second housing portion 212. A portion of the bottom protective plate 22 also protrudes to form a limiting structure 222. The heat exchange assembly 30 is provided with a clearance hole 33, through which the limiting structure 222 passes to support the second housing portion 212. The limiting structure 222 is disposed in the central region of the second receiving cavity 24. At least two flexible elements 31 are provided as aluminum-plastic films. The at least two flexible elements 31 include a heat-sealing area 34. The heat-sealing area 34 is constructed by hot-pressing the at least two flexible elements 31. The heat-sealing area 34 divides the heat exchange assembly 30 to form at least one flow channel region 32.

[0259] In one specific embodiment, the flexible component 31 has a layered structure, comprising a corrosion-resistant layer, an isolation layer, and a waterproof layer sequentially arranged, with the waterproof layer positioned closer to the flow channel region 32 than the corrosion-resistant layer. The thickness of the isolation layer is 6.5 μm-15 μm. The thickness of the corrosion-resistant layer is 5 μm-20 μm. The thickness of the waterproof layer is 50 μm-120 μm. The thickness of the flexible component 31 is 0.05 mm-0.3 mm. The elastic modulus of the flexible component 31 is 0.1 MPa-10000 MPa.

[0260] It should be noted that the width of the heat-sealed area 34 can be measured with vernier calipers before the heat exchange component is assembled into the housing component; the dimension of the first sub-area 381 in the second direction can be measured with vernier calipers before the heat exchange component is assembled into the housing component; the radius of the arc-shaped area 384 can be measured with calipers before the heat exchange component is assembled into the housing component; the thickness of the corrosion-resistant layer, the isolation layer, and the waterproof layer can be measured with vernier calipers; the thickness of the flexible component 31 can be measured with vernier calipers before the heat exchange component is assembled into the housing component. It should be noted that all of the above measurements can be performed at normal temperature and pressure.

[0261] The elastic modulus of the flexible component 31 can be measured by at least one of the following methods: static tensile testing, dynamic testing, sound velocity method, nanoindentation method, and bending method. The measuring instrument can include a nanoindenter and a universal testing machine.

[0262] For example, the elastic modulus of the flexible part 31 can be measured by nanoindentation under normal temperature and pressure. Nanoindentation uses a tiny indenter to indent the surface of the flexible part 31, and calculates the elastic modulus by analyzing the relationship between the indentation depth and the load.

[0263] In the description of this disclosure, references to terms such as "in one embodiment," "in some embodiments," "in other embodiments," "in yet another embodiment," or "exemplary," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the embodiments of this disclosure. In this disclosure, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine the different embodiments or examples described in this disclosure and the features of the different embodiments or examples without contradiction.

[0264] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure are included within the scope of protection of this disclosure.

Claims

1. A battery device, comprising: Enclosure assembly; A battery cell assembly is disposed within the housing assembly; A heat exchange assembly is disposed within the housing assembly; wherein the heat exchange assembly includes at least two flexible elements, which are stacked together, and the at least two flexible elements are hot-pressed to form a heat-sealing area and a flow channel area; The flow channel region is used to conduct heat exchange medium to exchange heat with the battery cell assembly; the heat sealing region includes a heat sealing area, and the at least two flexible members are interconnected within the heat sealing area.

2. The battery device according to claim 1, wherein, The heat-sealing zone also includes a non-heat-sealing zone, and the non-heat-sealing zone and the heat exchange channel are located on opposite sides of the heat-sealing zone.

3. The battery device according to claim 1 or 2, wherein, The width of the heat-sealing zone is 0.5mm-30mm.

4. The battery device according to claim 3, wherein, The width of the heat-sealing zone is 2mm-3mm.

5. The battery device according to any one of claims 2-4, wherein, The non-heat-sealed area includes a closed area, and the flow channel region surrounds the closed area.

6. The battery device according to claim 5, wherein, The enclosed area includes a first sub-region that extends along a first direction and has a dimension D in a second direction, where 1mm ≤ D ≤ 50mm. The first direction is perpendicular to the second direction.

7. The battery device according to claim 6, wherein, The non-heat-sealed area also includes a second sub-region, which extends along a second direction and has a dimension D in the first direction, where 1mm ≤ D ≤ 50mm.

8. The battery device according to any one of claims 5-7, wherein, At least a portion of the enclosed area has an arc-shaped region at its end along the extension direction.

9. The battery device according to claim 8, wherein, The radius of the arc-shaped region is R, where 4mm ≤ R ≤ 30mm.

10. The battery device according to claim 9, wherein, 8mm≤R≤20mm.

11. The battery device according to any one of claims 8-10, wherein, The enclosed area includes a main area and an arc-shaped area. The main area extends along a first direction, and the arc-shaped area is provided at at least one end of the main area along the first direction. The main area has a dimension D in a second direction, and the radius of the arc-shaped area is R, where R ≥ D / 2. The first direction is perpendicular to the second direction.

12. The battery device according to claim 11, wherein, The main body area and the arc-shaped area are smoothly connected.

13. The battery device according to any one of claims 8-12, wherein, The central angle corresponding to the arc-shaped region is greater than or equal to 180°.

14. The battery device according to any one of claims 1-13, wherein, The at least two flexible components are configured as metal plasticized films.

15. The battery device according to claim 14, wherein, The at least two flexible components are configured as aluminum-plastic films.

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

17. The battery device according to claim 16, wherein, The metal layer includes one or more of aluminum foil, copper foil, and steel foil.

18. The battery device according to claim 16 or 17, wherein, The non-metallic layer includes one or more of polypropylene, polyvinyl chloride, and polyethylene.

19. The battery device according to any one of claims 16-18, wherein, The non-metallic layer is a hot-melt layer.

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

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

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

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

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

25. The battery device according to any one of claims 1-24, wherein, The thickness of the flexible component is 0.05mm-0.3mm.

26. The battery device according to claim 25, wherein, The thickness of the flexible component is 0.08mm-0.2mm.

27. The battery device according to any one of claims 1-26, wherein, The elastic modulus of the flexible component is 0.1 MPa-10000 MPa.

28. A heat exchange component, wherein the heat exchange component is a heat exchange component of the battery device according to any one of claims 1-27, the heat exchange component being used to exchange heat with the battery cell assembly.

29. An electrical device comprising a battery device according to any one of claims 1-27 or a heat exchange assembly according to claim 28.

30. An energy storage device comprising a battery device according to any one of claims 1-27 or a heat exchange component according to claim 28.

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