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

Abstract

The embodiments of the present disclosure provide a heat exchange unit, a battery apparatus, an electric device, and an energy storage device. The battery apparatus comprises a casing assembly, a battery cell assembly, a heat exchange unit, and an adjustment assembly. The casing assembly is internally provided with a first accommodating cavity. The battery cell assembly is disposed within the first accommodating cavity. The heat exchange unit is configured for exchanging heat with the battery cell assembly. The heat exchange unit comprises a flexible heat exchange unit, wherein the flexible heat exchange unit is provided with at least one flexible flow channel portion, and the flexible flow channel portion forms a heat exchange flow channel. The adjustment assembly presses the flexible flow channel portion so as to adjust a flow channel cross-sectional area of the at least one heat exchange flow channel.

Description

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

[0001] Cross-reference to related applications

[0002] This disclosure is based on and claims priority to Chinese Patent Application No. 202422074703.0, filed on August 26, 2024, entitled "Heat Exchange Unit, Battery Device, Electrical Equipment and Energy Storage Device", the entire contents of which are incorporated herein by reference. Technical Field

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

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

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

[0006] In view of this, the present disclosure aims to provide a heat exchange unit, a battery device, an electrical device, and an energy storage device that can improve the heat exchange effect to a certain extent.

[0007] To achieve the above objectives, a first aspect of this disclosure provides a battery device, comprising:

[0008] The housing assembly has a first receiving cavity inside;

[0009] A battery cell assembly is disposed within the first receiving cavity;

[0010] A heat exchange unit is configured to exchange heat with a battery cell assembly; the heat exchange unit includes a flexible heat exchange unit having at least one flexible flow channel portion forming a heat exchange flow channel.

[0011] An adjustment component that extrudes a flexible flow channel to adjust the cross-sectional area of ​​at least one heat exchange flow channel.

[0012] The battery device provided in this disclosure includes a housing assembly, a battery cell assembly, a heat exchange unit, and an adjustment 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 unit is configured to exchange heat with the battery cell assembly. On one hand, the heat exchange unit includes a flexible heat exchange unit made of a flexible component. The flexible component is lightweight, which helps to reduce the weight of the battery device, lower the production cost of the heat exchange unit, and improve the energy density of the battery device. On the other hand, by setting the flexible component as a flexible structure, the heat exchange unit can fit better with the housing assembly and / or the battery cell assembly, thereby facilitating the absorption of assembly tolerances of the heat exchange unit. It eliminates the need for sealants or thermally conductive materials, improves the fit between the heat exchange unit and the housing assembly and / or the battery cell assembly, increases the effective heat exchange area between the heat exchange unit and the housing assembly and / or the battery cell assembly, and thus improves the heat exchange efficiency and heat exchange effect of the heat exchange unit.

[0013] Furthermore, by setting an adjustment component, the adjustment component can adjust the cross-sectional area of ​​at least one heat exchange channel by squeezing the flexible flow channel section. In other words, the flow rate of the heat exchange medium in the heat exchange channel can be adjusted. Thus, the flow rate of the heat exchange medium in each heat exchange channel can be adjusted according to the temperature difference in different areas of the battery device or the temperature difference in different states of the battery device, thereby further improving the heat exchange efficiency and heat exchange effect of the heat exchange unit, and thus improving the thermal management performance and temperature uniformity of the battery device.

[0014] In some embodiments, the battery device further includes an adjustment component disposed in the heat exchange unit and configured to control the size of the cross-sectional area of ​​at least one heat exchange channel.

[0015] This allows for dynamic adjustment of the cross-sectional area of ​​the heat exchange channel in different areas of the battery device based on temperature changes, thereby achieving dynamic distribution of the heat exchange medium flow rate. This is beneficial for improving the heat dissipation performance of the high-temperature areas of the battery device, and further enhances the thermal management performance and temperature uniformity of the battery device.

[0016] In some embodiments, the regulating component includes at least two controllers, each corresponding to a different heat exchange channel, and the at least two controllers can compress the heat exchange channel by movement.

[0017] Because the flexible component is a flexible structure, the size of the flow cross-sectional area of ​​each heat exchange channel can be controlled by moving the control component closer to or further away from each heat exchange channel.

[0018] In some embodiments, the regulating assembly further includes a connector, one end of each control element is connected to the connector, the free end of each control element is used to compress the heat exchange channel, and the distance between the free end of at least one control element and the connector is different from the distance between the free end of the other control elements and the connector.

[0019] By setting different heights for each control component, the connection can be adjusted to move closer to or further away from the heat exchange unit, thereby achieving fixed differential control of each heat exchange channel by each control component. The movement and control methods of this adjustment component are simple and reliable.

[0020] In some embodiments, the regulating component further includes a signal acquisition device and an regulating structure. The signal acquisition device is used to acquire temperature information of different regions of the battery cell assembly, and the regulating structure is used to control the compression amount of the heat exchange channel by the control element based on the temperature information.

[0021] In this embodiment, by setting up a signal acquisition device and an adjustment structure, the signal acquisition device collects temperature information of different areas of the battery cell assembly, and the adjustment structure is used to control the compression amount of the control component in the heat exchange channel according to the temperature information. That is, according to the temperature changes in different areas of the battery device, the size of the flow cross-sectional area of ​​the heat exchange channel in the corresponding area can be dynamically adjusted, which further improves the accuracy of temperature adjustment of the battery device.

[0022] In some embodiments, the regulating component includes a temperature controller disposed between the battery cell assembly and the heat exchange unit. The arrangement direction of the battery cell assembly, the temperature controller, and the heat exchange unit is defined as a first direction. When the temperature of the battery cell assembly rises, the temperature controller absorbs heat and expands in a direction perpendicular to the first direction, and contracts in the first direction, thereby reducing the compression of the heat exchange channel by the temperature controller.

[0023] In this embodiment, by setting a temperature controller, when the temperature of the battery cell assembly rises, the temperature controller absorbs heat and expands in a direction perpendicular to the first direction and contracts in the first direction. In this way, the size of the temperature controller in the first direction can be reduced, thereby reducing the amount of compression of the heat exchange channel by the temperature controller. The cross-sectional area of ​​the heat exchange channel corresponding to this area is increased, which is beneficial to improving the heat dissipation of this area, thereby realizing automatic control of the size of the cross-sectional area of ​​the heat exchange channel.

[0024] In some embodiments, at least one heat exchange channel has a width different from the widths of the other heat exchange channels.

[0025] In this embodiment, the width of the heat exchange channel can be designed to be different according to the heat dissipation requirements of different areas of the battery device. For example, the width of the heat exchange channel corresponding to the high temperature area of ​​the battery device is generally larger, and the width of the heat exchange channel corresponding to the low temperature area of ​​the battery device is smaller. According to the temperature changes in different areas of the battery device, the flow rate of the heat exchange medium can be distributed, the overall temperature of the battery device can be accurately adjusted, the heat exchange efficiency and heat exchange effect of the heat exchange unit are improved, and the thermal management performance and temperature uniformity of the battery device are improved.

[0026] In some embodiments, the flexible heat exchange unit includes at least two flexible elements, which are stacked and at least one heat exchange channel is formed between the flexible elements. The at least one heat exchange channel is used to conduct heat exchange medium, which is used to exchange heat with the battery cell assembly.

[0027] In this embodiment, the heat exchange unit utilizes a flexible heat exchange unit made of a flexible component. The lightweight flexible component helps reduce the weight of the battery device, lowers the production cost of the heat exchange unit, and improves the energy density of the battery device. Furthermore, by setting the flexible component as a flexible structure, its thinness and good flexibility allow for better bending, enabling it to bend towards adjacent heat exchange units as needed. This allows for proximity and connection between adjacent heat exchange units, facilitating communication between them and reducing space requirements. Additionally, it allows for better fit between the heat exchange unit and the housing assembly and / or battery cell assembly, facilitating the absorption of assembly tolerances and eliminating the need for sealants or thermally conductive materials. This improves the fit between the heat exchange unit and the housing assembly and / or battery cell assembly, increasing the effective heat exchange area and thus enhancing the heat exchange efficiency and effect of the heat exchange unit.

[0028] In some embodiments, at least two flexible elements are configured as metal plasticized films.

[0029] In this embodiment, because the metal plasticized film is thin and lightweight, and because a heat exchange channel 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 unit can be reduced. Furthermore, the heat exchange unit does not react with the internally flowing heat exchange medium, so there is no risk of corrosion or leakage.

[0030] In some embodiments, at least two flexible elements are configured as aluminum-plastic films.

[0031] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0032] In some embodiments, the flexible element has a layered structure, comprising a metal layer and a non-metal layer, which are stacked sequentially.

[0033] In this embodiment, the flexible component, composed of sequentially stacked metal and non-metal layers, is thin and lightweight. Furthermore, by forming a heat exchange channel 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 unit. In addition, the heat exchange unit does not react with the internally flowing heat exchange medium, therefore eliminating the risk of corrosion and leakage.

[0034] In some embodiments, the metal layer includes one or more of aluminum foil, copper foil, and steel foil.

[0035] This allows flexible components to have a certain structural strength and to serve as an isolation mechanism.

[0036] In some embodiments, the non-metallic layer includes one or more of polypropylene, polyvinyl chloride, and polyethylene.

[0037] This allows flexible components to have a certain degree of waterproofing.

[0038] In some embodiments, the non-metallic layer is a hot-melt layer.

[0039] 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.

[0040] In some embodiments, the flexible element has a layered structure, comprising a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged sequentially, with the waterproof layer being closer to the heat exchange channel than the corrosion-resistant layer.

[0041] 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 heat exchange channel than the corrosion-resistant layer, which helps to improve the reliability of the heat exchange unit.

[0042] In some embodiments, the thickness of the isolation layer is 6.5 μm-100 μm.

[0043] 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.

[0044] In some embodiments, the thickness of the isolation layer is 6.5 μm-15 μm.

[0045] 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.

[0046] In some embodiments, the thickness of the corrosion-resistant layer is 5μm-20μm.

[0047] 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.

[0048] In some embodiments, the thickness of the waterproof layer is 50μm-120μm.

[0049] 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.

[0050] In some embodiments, the thickness of the flexible element is 0.05mm-0.3mm.

[0051] By setting the thickness of the flexible component to 0.05mm-0.3mm, the heat exchange unit made of the flexible component has a certain structural strength while making the overall thickness of the heat exchange unit small, which helps to reduce the overall volume and weight of the battery and increase the energy density of the battery.

[0052] In some embodiments, the thickness of the flexible element is 0.08mm-0.2mm.

[0053] By setting the thickness of the flexible component to 0.08mm-0.2mm, the heat exchange unit made of the flexible component has a certain structural strength, while the overall thickness of the heat exchange unit is further reduced, which is beneficial to further reduce the overall volume and weight of the battery, thereby further increasing the energy density of the battery.

[0054] In some embodiments, the elastic modulus of the flexible element is 0.1 MPa-10000 MPa.

[0055] 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 unit and also has a certain deformation capacity. This can improve the fit between the heat exchange unit and the housing assembly and / or the battery assembly / cell assembly, thereby increasing the effective heat exchange area between the heat exchange unit and the housing assembly and / or the battery assembly / cell assembly, and thus improving the heat exchange efficiency and heat exchange effect of the heat exchange unit.

[0056] In some embodiments, at least two flexible elements include hot-pressed regions, which are configured such that at least two flexible elements are formed by hot pressing, and the hot-pressed regions divide the heat exchange unit to form at least one heat exchange channel.

[0057] In this embodiment, the flexible component is sealed by a hot pressing process, that is, a hot pressing area is formed by hot pressing. The hot pressing area divides the heat exchange unit to form at least one heat exchange channel. This molding method is simple.

[0058] A second aspect of this disclosure provides a heat exchange unit, which is the heat exchange unit of the battery device described above, and the heat exchange unit is configured to exchange heat with the battery cell assembly.

[0059] The heat exchange unit provided in this embodiment is disposed within a housing assembly and configured to exchange heat with the battery cell assembly. On one hand, the heat exchange unit includes a flexible heat exchange unit made of a flexible component. The flexible component is lightweight, which helps to reduce the weight of the battery device, lower the production cost of the heat exchange unit, and improve the energy density of the battery device. On the other hand, by setting the flexible component as a flexible structure, the heat exchange unit can fit better with the housing assembly and / or the battery cell assembly, thereby facilitating the absorption of assembly tolerances of the heat exchange unit. It eliminates the need for sealant or thermally conductive materials, improves the fit between the heat exchange unit and the housing assembly and / or the battery cell assembly, and increases the effective heat exchange area between the heat exchange unit and the housing assembly and / or the battery cell assembly, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange unit.

[0060] Furthermore, by setting an adjustment component, the adjustment component can adjust the cross-sectional area of ​​at least one heat exchange channel by squeezing the flexible flow channel section. In other words, the flow rate of the heat exchange medium in the heat exchange channel can be adjusted. Thus, the flow rate of the heat exchange medium in each heat exchange channel can be adjusted according to the temperature difference in different areas of the battery device or the temperature difference in different states of the battery device, thereby further improving the heat exchange efficiency and heat exchange effect of the heat exchange unit, and thus improving the thermal management performance and temperature uniformity of the battery device.

[0061] A third aspect of this disclosure provides an electrical device, including the battery device or the heat exchange unit described above.

[0062] The battery device of the electrical equipment provided in this disclosure includes a housing assembly, a battery cell assembly, a heat exchange unit, and a regulating 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 unit is also disposed within the housing assembly and configured to exchange heat with the battery cell assembly. On one hand, the heat exchange unit includes a flexible heat exchange unit made of a flexible component. The flexible component is lightweight, which helps to reduce the weight of the battery device, lower the production cost of the heat exchange unit, and improve the energy density of the battery device. On the other hand, by setting the flexible component as a flexible structure, the heat exchange unit can fit better with the housing assembly and / or the battery cell assembly, thereby facilitating the absorption of assembly tolerances of the heat exchange unit. It eliminates the need for sealants or thermally conductive materials, improves the fit between the heat exchange unit and the housing assembly and / or the battery cell assembly, increases the effective heat exchange area between the heat exchange unit and the housing assembly and / or the battery cell assembly, and thus improves the heat exchange efficiency and heat exchange effect of the heat exchange unit.

[0063] Furthermore, by setting an adjustment component, the adjustment component can adjust the cross-sectional area of ​​at least one heat exchange channel by squeezing the flexible flow channel section. In other words, the flow rate of the heat exchange medium in the heat exchange channel can be adjusted. Thus, the flow rate of the heat exchange medium in each heat exchange channel can be adjusted according to the temperature difference in different areas of the battery device or the temperature difference in different states of the battery device, thereby further improving the heat exchange efficiency and heat exchange effect of the heat exchange unit, and thus improving the thermal management performance and temperature uniformity of the battery device.

[0064] A fourth aspect of this disclosure provides an energy storage device, including the battery device described above or the heat exchange unit described above.

[0065] The battery device of the energy storage device provided in this embodiment includes a housing assembly, a battery cell assembly, a heat exchange unit, and a regulating 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 unit is also disposed within the housing assembly and configured to exchange heat with the battery cell assembly. On one hand, the heat exchange unit includes a flexible heat exchange unit made of a flexible component. The flexible component is lightweight, which helps to reduce the weight of the battery device, lower the production cost of the heat exchange unit, and improve the energy density of the battery device. On the other hand, by setting the flexible component as a flexible structure, the heat exchange unit can fit better with the housing assembly and / or the battery cell assembly, thereby facilitating the absorption of assembly tolerances of the heat exchange unit, eliminating the need for sealants or thermally conductive materials, improving the fit between the heat exchange unit and the housing assembly and / or the battery cell assembly, increasing the effective heat exchange area between the heat exchange unit 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 unit.

[0066] Furthermore, by setting an adjustment component, the adjustment component can adjust the cross-sectional area of ​​at least one heat exchange channel by squeezing the flexible flow channel section. In other words, the flow rate of the heat exchange medium in the heat exchange channel can be adjusted. Thus, the flow rate of the heat exchange medium in each heat exchange channel can be adjusted according to the temperature difference in different areas of the battery device or the temperature difference in different states of the battery device, thereby further improving the heat exchange efficiency and heat exchange effect of the heat exchange unit, and thus improving the thermal management performance and temperature uniformity of the battery device. Attached Figure Description

[0067] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of this disclosure;

[0068] Figure 2 is an exploded perspective view of a battery device provided in an embodiment of the present disclosure, wherein the heat exchange unit is disposed in the second receiving cavity;

[0069] Figure 3 is a cross-sectional view of the battery device shown in Figure 2 after assembly in the BB direction;

[0070] Figure 4 is an enlarged view of point A in Figure 3;

[0071] Figure 5 is a schematic diagram of the connection structure between the heat exchange unit and the bottom cover plate provided in an embodiment of the present disclosure;

[0072] Figure 6 is a schematic diagram of the structure of a heat exchange unit provided in an embodiment of the present disclosure;

[0073] Figure 7 is a schematic diagram of the structure of a bottom protective plate provided in an embodiment of the present disclosure;

[0074] Figure 8 is an exploded perspective view of a battery device provided in another embodiment of the present disclosure, wherein the heat exchange unit is disposed in the first receiving cavity;

[0075] Figure 9 is a schematic diagram of the structure of an adjustment component provided in an embodiment of this disclosure;

[0076] Figure 10 is a schematic diagram of the structure of an adjustment component provided in another embodiment of the present disclosure, wherein the adjustment component includes a temperature controller;

[0077] Figure 11 is a schematic diagram of the structure of the regulating component shown in Figure 10 after heat absorption.

[0078] 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 unit; 31. Flexible component; 32. Heat exchange channel; 33. Clearance hole; 34. Hot pressing area; 35. Inlet; 36. Outlet; 40. Adjustment component; 41. Connecting component; 42. Control component; 43. Temperature controller; 100. Battery device; 200. Controller; 300. Motor; 1000. Vehicle. Detailed Implementation

[0079] Unless otherwise specified, all embodiments and optional embodiments of this disclosure can be combined to form new technical solutions.

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

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0086] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0087] As an example, the positive current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0088] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this disclosure is not limited to these materials, and other conventional materials that can be used as battery positive electrode active materials may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium phosphate include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), lithium iron phosphate and carbon composites, lithium manganese phosphate (such as LiMnPO4), lithium manganese phosphate and carbon composites, lithium iron manganese phosphate, and lithium iron manganese phosphate and carbon composites. Examples of lithium transition metal oxides include, but are not limited to, lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, and lithium nickel cobalt manganese oxide (such as LiNi). 1 / 3 Co 1 / 3 Mn 1 / 3 O2 (also known as NCM) 333 LiNi 0.5 Co 0.2 Mn 0.3 O2 (also known as NCM) 523 LiNi 0.5 Co 0.25 Mn 0.25 O2 (also known as NCM) 211 LiNi 0.6 Co 0.2 Mn 0.2 O2 (also known as NCM) 622 LiNi 0.8 Co 0.1 Mn 0.1 O2 (also known as NCM)811 ), lithium nickel cobalt aluminum oxide (such as LiNi) 0.8 Co 0.15 Al 0.05 At least one of O2 and its modified compounds. Modified compounds refer to substances obtained by modification methods such as doping or coating based on the above-mentioned substances.

[0089] In some embodiments, the positive electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. When foamed metal is used as the positive electrode, the surface of the foamed metal may or may not contain a positive electrode active material. As an example, a positive electrode active material is filled and / or deposited within the foamed metal.

[0090] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0091] As an example, the negative electrode current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material substrate and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0092] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0093] As an example, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0094] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cells. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this disclosure is not limited to these materials, and other conventional materials that can be used as negative electrode active materials for battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0095] In some embodiments, the negative electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. When foamed metal is used as the negative electrode sheet, the surface of the foamed metal may or may not have a negative electrode active material.

[0096] As an example, negative electrode active materials can be filled or / and deposited within the negative electrode current collector.

[0097] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0098] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0099] In some embodiments, the separator is a separator membrane. This disclosure does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0100] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a single component located between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes. An inorganic particle coating, an organic particle coating, or an organic / inorganic composite coating can also be applied to the surface of the separator.

[0101] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0102] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This disclosure does not impose specific limitations on the type of electrolyte; it can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0103] Liquid electrolytes include electrolyte salts and solvents.

[0104] In some embodiments, the electrolyte salt may be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalate borate, lithium dioxalate borate, lithium difluorodioxalate phosphate, and lithium tetrafluorooxalate phosphate.

[0105] In some embodiments, the solvent may be selected from at least one of ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butyl carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent may also be an ether solvent. Ether solvents may include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyl tetrahydrofuran, diphenyl ether, and crown ethers.

[0106] In some embodiments, the electrolyte may optionally include additives. For example, additives may include negative electrode film-forming additives, positive electrode film-forming additives, and additives that can improve certain properties of the battery cell, such as additives that improve the overcharge / fast charge performance of the battery cell, additives that improve the high-temperature performance of the battery cell, and additives that improve the low-temperature performance of the battery cell.

[0107] The gel electrolyte includes a polymer as a backbone network and can be used in conjunction with an ionic liquid-lithium salt.

[0108] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0109] As an example, the polymers of polymeric solid electrolytes may include polyethers (polyoxyethylene), polysiloxanes, polycarbonates, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids, cellulose, etc.

[0110] As an example, inorganic solid electrolytes can be one or more of the following: oxide solid electrolytes (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON thin film), sulfide solid electrolytes (crystalline lithium superconducting ion conductor (lithium-germanium-phosphorus-sulfur, sulfosilium-germanium), amorphous sulfides), halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes.

[0111] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0112] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0113] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0114] In some implementations, the electrode assembly is a stacked structure.

[0115] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0116] 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.

[0117] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0118] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0119] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0120] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] In some embodiments, energy storage devices include energy storage containers, energy storage cabinets, etc.

[0127] 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.

[0128] Therefore, in order to improve the heat exchange efficiency and effect of the heat exchange unit, this disclosure provides a battery device, which includes a housing assembly, a battery cell assembly, a heat exchange unit, and an adjustment assembly. The housing assembly has a first receiving cavity inside. The battery cell assembly is disposed within the first receiving cavity. The heat exchange unit is configured to exchange heat with the battery cell assembly. The heat exchange unit includes a flexible heat exchange unit having at least one flexible flow channel portion forming a heat exchange flow channel. The adjustment assembly compresses the flexible flow channel portion to adjust the cross-sectional area of ​​the at least one heat exchange flow channel.

[0129] The battery device provided in this embodiment includes a housing assembly, a battery cell assembly, a heat exchange unit, and an adjustment 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 unit is also disposed within the housing assembly and configured to exchange heat with the battery cell assembly. On one hand, the heat exchange unit includes a flexible heat exchange unit made of a flexible component. The flexible component is lightweight, which helps to reduce the weight of the battery device, lower the production cost of the heat exchange unit, and improve the energy density of the battery device. On the other hand, by setting the flexible component as a flexible structure, the flexible structure has a certain deformation capability, which allows the heat exchange unit to better fit and adapt to the housing assembly and / or the battery cell assembly. This helps to absorb the assembly tolerance of the heat exchange unit, improve the fit between the heat exchange unit and the housing assembly and / or the battery cell assembly, increase the effective heat exchange area between the heat exchange unit and the housing assembly and / or the battery cell assembly, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange unit.

[0130] Furthermore, by setting an adjustment component, the adjustment component can adjust the cross-sectional area of ​​at least one heat exchange channel by squeezing the flexible flow channel section. In other words, the flow rate of the heat exchange medium in the heat exchange channel can be adjusted. Thus, the flow rate of the heat exchange medium in each heat exchange channel can be adjusted according to the temperature difference in different areas of the battery device or the temperature difference in different states of the battery device, thereby further improving the heat exchange efficiency and heat exchange effect of the heat exchange unit, and thus improving the thermal management performance and temperature uniformity of the battery device.

[0131] 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.

[0132] 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.

[0133] 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.

[0134] 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.

[0135] To meet different power demands, the battery device includes a battery cell assembly 10, which may include multiple battery cells 11. Each battery cell 11 is the smallest unit that makes up a battery device module or battery pack. 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 multiple battery cells 11 is housed within a housing assembly 20. Alternatively, the battery device 100 can also consist of multiple battery cells 11 first connected in series, parallel, or in a mixed configuration to form battery device modules, 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 multiple battery cells 11. Each battery cell 11 can be a secondary battery device or a primary battery device; it can also be a lithium-sulfur battery device, a sodium-ion battery device, or a magnesium-ion battery device, but is not limited to these. The battery cell 11 can be cylindrical, flat, cuboid, or other shapes.

[0136] This disclosure provides a battery device including a housing assembly 20, a battery cell assembly 10, and a heat exchange unit 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 unit 30 is configured to exchange heat with the battery cell assembly 10. The heat exchange unit 30 includes a flexible heat exchange unit having at least one flexible flow channel portion forming a heat exchange flow channel 32. An adjusting assembly 40 compresses the flexible flow channel portion to adjust the cross-sectional area of ​​the at least one heat exchange flow channel.

[0137] Please refer to Figures 2 and 8. The battery device 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 in the first receiving cavity 23 of the housing assembly 20.

[0138] 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.

[0139] 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.

[0140] Please refer to Figures 2 to 6. This embodiment of the present disclosure provides a heat exchange unit. The heat exchange unit 30 is the heat exchange unit 30 of the battery device 100 provided in this embodiment of the present disclosure. The heat exchange unit 30 is configured to exchange heat with the battery cell assembly 10.

[0141] Here, the heat exchange unit 30 can be disposed inside the first receiving cavity 23, that is, it can be in direct contact with the battery cell assembly 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 unit 30 and the battery cell assembly 10.

[0142] The heat exchange unit 30 includes a flexible heat exchange unit, which includes at least two flexible elements 31. The at least two flexible elements 31 are stacked and at least one heat exchange channel 32 is formed between the flexible elements 31. The at least one heat exchange channel 32 is used to conduct heat exchange medium, which is used to exchange heat with the battery cell assembly 10.

[0143] Here, the flexible component 31 is configured as a flexible structure, meaning it is made of a material that can be deformed by extrusion, giving it good tensile strength, water impermeability, and elongation at break. The flexible component 31, being a flexible structure, possesses certain expandable or contractile characteristics, allowing the heat exchange unit 30 to be formed into a contoured structure. This improves the fit between the heat exchange unit 30 and the housing assembly 20 and / or the battery cell assembly 10, thereby increasing the effective heat exchange area between the heat exchange unit 30 and the housing assembly 20 and / or the battery cell assembly 10.

[0144] Of course, the heat exchange unit 30 may also include a rigid heat exchange unit.

[0145] The heat exchange unit 30 includes at least two flexible elements 31, meaning that the number of flexible elements 31 included in the heat exchange unit 30 can be two or more.

[0146] Here, the flexibility in the flexible component 31 refers to the material properties of the structure. This type of property can be due to the material's light weight, or it can be due to at least one of the material's properties such as thickness, stiffness, strength, and elastic modulus. As an example, the material of the flexible component 31 can be selected as a material that is lighter than conventional aluminum plates, steel plates, etc., and its flexibility can be controlled by the thickness, width, length, and type of material of the flexible component 31. In this embodiment of the disclosure, by setting the heat exchange unit 30 in the form of a flexible component 31, it is beneficial to reduce the weight of the heat exchange unit 30.

[0147] 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.

[0148] The flow rate of the heat exchange medium in each heat exchange channel 32 can be adjusted according to the temperature difference in different areas of the battery device 100, or according to the temperature difference in different states of the battery device 100.

[0149] It should be noted that a flow cross-section refers to a cross-section orthogonal to all streamlines of the primary or total flow, that is, a surface perpendicular to the velocity cluster, such as airflow or liquid flow. When the streamline clusters are not parallel to each other, the flow cross-section is a curved surface; when the streamline clusters are parallel straight lines, the flow cross-section is a plane.

[0150] For example, referring to Figures 6 and 7, the heat exchange unit 30 also includes an inlet 35 and an outlet 36, both of which are connected to the heat exchange channel 32.

[0151] Here, the inlet 35 and outlet 36 of the heat exchange unit 30 are used for connecting to the pipelines of the vehicle or electrical equipment.

[0152] The heat exchange unit 30 having at least two heat exchange channels 32 means that the number of heat exchange channels 32 is two or more.

[0153] The principle of heat exchange unit 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 heat exchange channel through the inlet 35 of heat exchange unit 30. After the heat exchange medium exchanges heat with battery cell assembly 10, the heat exchange medium flows out through the outlet 36 of heat exchange unit 30, thus completing the heat exchange of battery cell assembly 10.

[0154] Here, the heat exchange unit 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.

[0155] The principle of heat exchange unit 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 heat exchange channel through the inlet 35 of the heat exchange unit 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 unit 30, releasing the heat and completing the cooling and heat dissipation of battery cell assembly 10.

[0156] The principle of the heat exchange unit 30 heating the battery cell assembly 10 is as follows: the heat exchange medium output from the heat exchange source enters the heat exchange channel through the inlet 35 of the heat exchange unit 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 unit 30, thus completing the heating of the battery cell assembly 10.

[0157] 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 unit 30 can be formed into a contour structure. The heat exchange unit 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 unit 30 and the housing assembly 20 and / or the battery cell assembly 10, thereby increasing the effective heat exchange area between the heat exchange unit 30 and the housing assembly 20 and / or the battery cell assembly 10, and thus improving the heat exchange efficiency.

[0158] It should be noted that the flexible component 31 can have conductive properties, which is beneficial for equipotential setting; the flexible component 31 can also have electrical insulation properties, 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.

[0159] The battery device provided in this embodiment includes a housing assembly 20, a battery cell assembly 10, a heat exchange unit 30, and an adjustment assembly 40. The battery cell assembly 10 is disposed in the first receiving cavity 23 of the housing assembly 20, and the housing assembly 20 protects the battery cell assembly 10. The heat exchange unit 30 is configured to exchange heat with the battery cell assembly 10. On the one hand, the heat exchange unit 30 includes a flexible heat exchange unit made of a flexible element 31. The flexible element 31 is lightweight, which helps to reduce the weight of the battery device 100, reduce the production cost of the heat exchange unit 30, and improve the energy density of the battery device 100. On the other hand, by setting the flexible element 31 as a flexible structure, the flexible structure has a certain deformation capability, which allows the heat exchange unit 30 to fit and adapt better with the housing assembly 20 and / or the battery cell assembly 10. This helps to absorb the assembly tolerance of the heat exchange unit 30, improve the fit between the heat exchange unit 30 and the housing assembly 20 and / or the battery cell assembly 10, increase the effective heat exchange area between the heat exchange unit 30 and the housing assembly 20 and / or the battery cell assembly 10, and thus improve the heat exchange efficiency and heat exchange effect of the heat exchange unit 30.

[0160] Furthermore, by providing the adjustment component 40, the adjustment component 40 can adjust the cross-sectional area of ​​at least one heat exchange channel 32 by squeezing the flexible flow channel portion. In other words, the flow rate of the heat exchange medium in the heat exchange channel 32 can be adjusted. Thus, the flow rate of the heat exchange medium in each heat exchange channel 32 can be adjusted according to the temperature difference in different areas of the battery device 100 or the temperature difference in different states of the battery device 100, thereby further improving the heat exchange efficiency and heat exchange effect of the heat exchange unit 30, and thus improving the thermal management performance and temperature uniformity of the battery device 100.

[0161] Here, the heat exchange unit 30 can be disposed in the first receiving cavity 23, that is, the heat exchange unit 30 can be in direct contact with the battery cell assembly 10, thereby further improving the heat exchange efficiency between the heat exchange unit 30 and the battery cell assembly 10.

[0162] Of course, in other embodiments, please refer to Figure 2, a heat exchange unit 30 may be provided on the outside of the first receiving cavity 23.

[0163] That is, at least some of the heat exchange units 30 are disposed on the outside of the first receiving cavity 23, so as to separate the heat exchange units 30 from the battery cell assembly 10.

[0164] In this embodiment, a heat exchange unit 30 is provided on the outside of the first receiving cavity 23 to separate the heat exchange unit 30 from the battery cell assembly 10, thereby reducing the risk of the heat exchange medium of the heat exchange unit 30 coming into contact with the battery cell assembly 10 after leakage, thus reducing the risk of short circuit of the battery device 100 and improving the reliability of the battery device 100.

[0165] The housing assembly 20 is used to house the battery cell assembly 10, and the housing assembly 20 can have various structures. In some embodiments, referring to Figures 2 and 8, 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 may be a plate-like structure. The first housing portion 211 covers the open side of the second housing portion 212 to form a housing body 21 with the first receiving cavity 23; the first housing portion 211 and the second housing portion 212 may also both 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.

[0166] 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.

[0167] 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.

[0168] In other embodiments, referring to FIG2, the housing assembly 20 includes a housing body 21 and a bottom protective plate 22. 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 unit 30 is disposed within the second receiving cavity 24.

[0169] 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 it can be located on the side of the box body 21.

[0170] 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 part 211 and a second housing part 212. A first receiving cavity 23 is formed between the first housing part 211 and the second housing part 212. A second receiving cavity 24 is formed between the bottom guard plate 22 and the second housing part 212. A heat exchange unit 30 is disposed in the second receiving cavity 24.

[0171] Here, the provision of heat exchange unit 30 in the second receiving cavity 24 means that the heat exchange unit 30 can be provided only in the second receiving cavity 24, or the heat exchange unit 30 can be provided in other areas besides the second receiving cavity 24.

[0172] 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.

[0173] Here, by setting the bottom guard plate 22, the heat exchange unit 30 can be supported and protected.

[0174] The heat exchange unit 30 is disposed in the second receiving cavity 24, that is, the heat exchange unit 30 is disposed outside the first receiving cavity 23, so as to separate the heat exchange unit 30 from the battery cell assembly 10, avoid the problem of the heat exchange medium of the heat exchange unit 30 leaking and coming into contact with the battery cell assembly 10, thereby causing a short circuit in the battery device 100 and improving the reliability of the battery device 100.

[0175] 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 unit 30 is disposed within the second receiving cavity 24 and configured to exchange heat 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 unit 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 in the heat exchange unit 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.

[0176] 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.

[0177] A portion of the bottom guard plate 22 protrudes to form a connecting part 221, which is used to connect with the second housing part 212.

[0178] For example, the edge of the bottom guard plate 22 protrudes to form a ring of connecting portions 221, that is, the outermost ring of the bottom guard plate 22 protrudes to form a ring of connecting portions 221.

[0179] 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.

[0180] 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 unit 30 within the second receiving cavity 24.

[0181] In some embodiments, the housing assembly 20 further includes a seal that is sealed between the connecting portion 221 and the second housing portion 212.

[0182] For example, the seal is a sealing strip.

[0183] In this embodiment, by providing a sealing element and sealing the sealing element between the connecting part 221 and the second housing part 212, that is, by sealing the gap between the connecting part 221 and the second housing part 212, it is further beneficial to prevent mud or water from entering the second receiving cavity 24, thereby improving the sealing performance between the bottom guard plate 22 and the second housing part 212.

[0184] In some embodiments, as shown in Figures 2 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.

[0185] 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.

[0186] 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.

[0187] 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.

[0188] 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 unit 30 and causing the heat exchange unit 30 to collapse. This helps to improve the stability of the heat conduction interface contact of the heat exchange unit 30, thereby improving the thermal management performance of the heat exchange unit 30.

[0189] 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.

[0190] 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.

[0191] In this embodiment, the flexible member 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 unit 30 can also be fixed, thereby improving the stability of the heat exchange unit 30.

[0192] In some embodiments, please refer to Figures 2 to 6, the heat exchange unit 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.

[0193] Here, the heat exchange unit 30 is provided with a clearance hole 33, that is, the flexible part 31 is provided with a clearance hole 33, and the clearance hole 33 penetrates through the heat exchange unit 30 on both sides in the thickness direction.

[0194] It should be noted that the clearance hole 33 must avoid the heat exchange channel 32.

[0195] The specific location and number of clearance holes 33 are not limited here. They will be determined based on the specific circumstances.

[0196] For example, in an embodiment where the limiting structure 222 is used to support the second housing portion 212, the heat exchange unit 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.

[0197] In this embodiment, the heat exchange unit 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 unit 30, thereby improving the stability of the heat exchange unit 30.

[0198] In some embodiments, referring to Figures 2 through 6, at least two flexible members 31 include a hot-pressed region 34. The hot-pressed region 34 is configured such that at least two flexible members 31 are formed by hot pressing. The hot-pressed region 34 divides the heat exchange unit 30 to form at least one heat exchange channel 32.

[0199] Here, the flexible component 31 is sealed by hot pressing. The hot pressing process can effectively ensure that the heat exchange unit 30 has good sealing performance and is not easy to crack.

[0200] In this embodiment, the flexible component 31 is sealed by a hot pressing process, that is, a hot pressing region 34 is formed by hot pressing. The hot pressing region 34 divides the heat exchange unit 30 to form at least one heat exchange channel 32. This molding method is simple.

[0201] It should be noted that there are multiple ways to control the cross-sectional area of ​​the heat exchange channel 32.

[0202] In some embodiments, at least one heat exchange channel 32 has a width different from the widths of the other heat exchange channels 32.

[0203] In other words, the width of each heat exchange channel 32 is not the same, that is, the initial cross-sectional area of ​​each heat exchange channel 32 is different.

[0204] It should be noted that the greater the width of the heat exchange channel 32, the larger the cross-sectional area of ​​the heat exchange channel 32, and consequently the greater the flow rate of the heat exchange medium within the heat exchange channel 32. In other words, the cross-sectional area of ​​the heat exchange channel 32 is controlled according to its width.

[0205] In this embodiment, the width of the heat exchange channel 32 can be designed to be different according to the heat dissipation requirements of different areas of the battery device 100. For example, the width of the heat exchange channel 32 corresponding to the high temperature area of ​​the battery device 100 is generally larger, and the width of the heat exchange channel 32 corresponding to the low temperature area of ​​the battery device 100 is smaller. According to the temperature changes of different areas of the battery device 100, the flow rate of the heat exchange medium can be distributed, the overall temperature of the battery device 100 can be precisely adjusted, the heat exchange efficiency and heat exchange effect of the heat exchange unit 30 can be improved, and the thermal management performance and temperature uniformity of the battery device 100 can be improved.

[0206] In some embodiments, referring to Figures 8 to 11, the battery device 100 further includes an adjustment component 40. The adjustment component 40 is disposed in the heat exchange unit 30 and is used to control the size of the cross-sectional area of ​​at least one heat exchange channel 32.

[0207] The term "adjustment component 40 for controlling the size of the cross-sectional area of ​​at least one heat exchange channel 32" means that the adjustment component 40 can be used to control the size of the cross-sectional area of ​​one heat exchange channel 32, or it can be used to control the size of the cross-sectional area of ​​multiple heat exchange channels 32, such as controlling the size of the cross-sectional area of ​​all heat exchange channels 32.

[0208] Here, the initial cross-sectional area of ​​each heat exchange channel 32 can be the same or different.

[0209] It should be noted that the specific location of the adjustment component 40 is not limited here. For example, the adjustment component 40 is located near the inlet 35 or near the outlet 36. This facilitates full utilization of the space at the inlet 35 or outlet 36, thereby improving the structural compactness of the battery device 100 and thus increasing the energy density of the battery device 100.

[0210] In this embodiment, by setting an adjustment component 40 to control the size of the cross-sectional area of ​​at least one heat exchange channel 32, the size of the cross-sectional area of ​​the heat exchange channel 32 in the corresponding area can be dynamically adjusted according to the temperature changes in different areas of the battery device 100, thereby achieving the effect of dynamic distribution of the flow rate of the heat exchange medium. This is beneficial to improving the heat dissipation performance of the high-temperature area of ​​the battery device 100, and further improving the thermal management performance and temperature uniformity of the battery device 100.

[0211] It should be noted that the specific structure of the adjustment component 40 is not limited here.

[0212] In some embodiments, please refer to Figures 8 and 9, the regulating component 40 includes at least two control elements 42, each control element 42 corresponding to a different heat exchange channel 32, and the at least two control elements 42 can compress the heat exchange channel 32 by movement.

[0213] The regulating component 40 is equipped with multiple control elements 42, each of which corresponds to a different heat exchange channel 32. That is, the heat exchange channel 32 can be compressed by controlling each control element 42, and the cross-sectional area of ​​each heat exchange channel 32 can be controlled by controlling each control element 42 to move closer to or further away from each heat exchange channel 32.

[0214] It should be noted that the control of the flow cross-sectional area of ​​each heat exchange channel 32 by each control component 42 can be a fixed difference control, that is, the difference in the flow cross-sectional area of ​​each heat exchange channel 32 is fixed, that is, it is necessary to change the flow cross-sectional area of ​​each heat exchange channel 32 at the same time, or it can be a dynamic difference control, that is, the difference in the flow cross-sectional area of ​​each heat exchange channel 32 is not fixed, that is, it is not necessary to change the flow cross-sectional area of ​​each heat exchange channel 32 at the same time.

[0215] In this embodiment, since the flexible member 31 is a flexible structure, the size of the flow cross-sectional area of ​​each heat exchange channel 32 can be controlled by controlling the control member 42 to move closer to or further away from each heat exchange channel 32.

[0216] In some embodiments, referring further to Figures 8 and 9, the adjustment assembly 40 also includes a connector 41. One end of each control element 42 is connected to the connector 41. The free end of each control element 42 is used to compress the heat exchange channel 32. Furthermore, the distance between the free end of at least one control element 42 and the connector 41 is different from the distances between the free ends of the other control elements 42 and the connector 41.

[0217] One end of each control component 42 is connected to the connector 41. That is, the connector 41 is used to assemble each control component 42. Thus, by controlling the movement of the connector 41, each control component 42 can move simultaneously and with the same displacement.

[0218] Here, connector 41 is, for example, a connecting plate or a connecting block.

[0219] Here, the control element 42 is, for example, a control panel or a control block.

[0220] The end of each control element 42 away from the connector 41 is the free end of each control element 42, and the free end of each control element 42 is used to compress the heat exchange channel 32.

[0221] At least one control element 42 has a different distance between its free end and the connector 41 than the other control elements 42. In other words, the heights of the control elements 42 are not all the same. The heights of the control elements 42 can be set differently as needed, thus ensuring that the distances between each control element 42 and each heat exchange channel 32 are also different. This allows for fixed differential control of each heat exchange channel 32 by each control element 42.

[0222] In this embodiment, by setting the height of each control element 42 to be different, the connection element 41 can be controlled to move closer to or further away from the heat exchange unit 30, thereby achieving fixed differential control of each heat exchange channel 32 by each control element 42. The movement and control methods of this adjustment component are simple and reliable.

[0223] In some embodiments, referring to Figures 8 and 9, the regulating assembly 40 further includes a signal acquisition device and an regulating structure. The signal acquisition device is used to acquire temperature information of different regions of the battery cell assembly 10. The regulating structure is used to control the compression amount of the heat exchange channel 32 by the control element 42 based on the temperature information.

[0224] Here, the specific type of signal acquisition device is not limited; for example, it could be a temperature sensor.

[0225] Here, the specific type of adjustment structure is not limited, such as a linear module or a cylinder, which can control the control element 42 to move in the direction of approaching or moving away from the heat exchange channel 32.

[0226] In this embodiment, by setting up a signal acquisition device and an adjustment structure, the signal acquisition device acquires temperature information of different areas of the battery cell assembly 10, and the adjustment structure is used to control the compression amount of the control element 42 to compress the heat exchange channel 32 according to the temperature information. That is, according to the temperature changes of different areas of the battery device 100, the size of the flow cross-sectional area of ​​the heat exchange channel 32 in the corresponding area can be dynamically adjusted, which further improves the accuracy of temperature adjustment of the battery device 100.

[0227] In some embodiments, referring to Figures 10 and 11, the regulating assembly 40 includes a thermostat 43 disposed between the battery cell assembly 10 and the heat exchange unit 30. The arrangement direction of the battery cell assembly 10, the thermostat 43, and the heat exchange unit 30 is defined as a first direction. When the temperature of the battery cell assembly 10 rises, the thermostat 43 absorbs heat and expands in a direction perpendicular to the first direction, and contracts in the first direction. The compression of the heat exchange channel 32 by the thermostat 43 decreases.

[0228] Here, the first direction is not limited, and the embodiment of this disclosure takes the height direction as an example.

[0229] The temperature controller 43 is disposed between the battery cell assembly 10 and the heat exchange unit 30. For example, the temperature controller 43 is located at the bottom of the battery cell assembly 10 and above the heat exchange unit 30.

[0230] It should be noted that the specific structure of the thermostat 43 is not limited here. For example, the interior of the thermostat 43 is made of a temperature-controlling material, which expands rapidly when heated and contracts when cooled. The outer shell of the thermostat 43 is made of an elastic material, which is conducive to realizing the expansion or contraction of the thermostat 43.

[0231] Here, one temperature controller 43 can correspond to one heat exchange channel 32, or one temperature controller 43 can correspond to multiple heat exchange channels 32.

[0232] In this embodiment, by setting a temperature controller 43, when the temperature of the battery cell assembly 10 rises, the temperature controller 43 absorbs heat and expands in a direction perpendicular to the first direction and contracts in the first direction. In this way, the size of the temperature controller 43 in the first direction can be reduced, thereby reducing the amount of compression of the heat exchange channel 32 by the temperature controller 43. The cross-sectional area of ​​the heat exchange channel 32 corresponding to this area is increased, which is beneficial to improving the heat dissipation of this area, thereby realizing automatic control of the size of the cross-sectional area of ​​the heat exchange channel 32.

[0233] In some embodiments, the flexible element 31 is configured as a metal plastic film.

[0234] The flexible component 31 is a single-layer or multi-layer thin film.

[0235] Here, the metal plastic film is a metal-plastic composite material, which includes a metal layer and a plastic layer.

[0236] In this embodiment, because the metal plasticized film is thin and lightweight, and because a heat exchange channel 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 unit 30 can be reduced. Simultaneously, because the heat exchange unit 30 has insulating properties, the risk of insulation failure can be reduced. This also reduces the risk of the heat exchange unit 30 reacting with the internally flowing heat exchange medium, further reducing the risk of heat exchange medium corrosion and leakage.

[0237] For example, at least two flexible elements 31 are configured as aluminum-plastic films.

[0238] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0239] 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.

[0240] 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.

[0241] For example, the metal layer and the non-metal layer can be formed by hot pressing or hot melting.

[0242] Here, there is no limit to the number of metal layers and non-metal layers.

[0243] 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 heat exchange channel 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 unit 30. In addition, the heat exchange unit 30 does not react with the internally flowing heat exchange medium, therefore there is no risk of corrosion or leakage.

[0244] In some embodiments, the metal layer includes one or more of aluminum foil, copper foil, and steel foil.

[0245] 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.

[0246] In some embodiments, the non-metallic layer includes one or more of polypropylene, polyvinyl chloride, and polyethylene.

[0247] 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.

[0248] 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.

[0249] In some embodiments, the non-metallic layer is a hot-melt layer.

[0250] 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.

[0251] In some embodiments, the flexible element 31 has a layered structure, and the flexible element 31 includes a corrosion-resistant layer, an isolation layer and a waterproof layer arranged sequentially, with the waterproof layer being closer to the heat exchange channel 32 than the corrosion-resistant layer.

[0252] 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.

[0253] 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.

[0254] 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.

[0255] In this embodiment, by configuring the flexible component 31 to include a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged sequentially, and by placing the waterproof layer closer to the heat exchange channel 32 than the corrosion-resistant layer, the reliability of the heat exchange unit 30 is improved.

[0256] In some embodiments, referring to Figures 2 through 6, the flexible member 31 includes a hot-pressed region 34. The hot-pressed region 34 is configured such that at least two flexible members 31 are formed by hot pressing. The hot-pressed region 34 divides the heat exchange unit 30 to form at least one heat exchange channel 32.

[0257] Here, the flexible component 31 is sealed by hot pressing. The hot pressing process can effectively ensure that the heat exchange unit 30 has good sealing performance and is not easy to crack.

[0258] In this embodiment, the flexible component 31 is sealed by a hot pressing process, that is, a hot pressing region 34 is formed by hot pressing. The hot pressing region 34 divides the heat exchange unit 30 to form at least one heat exchange channel 32. This molding method is simple.

[0259] In some embodiments, the thickness of the isolation layer is 6.5 μm-100 μm.

[0260] 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.

[0261] 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.

[0262] In some embodiments, the thickness of the isolation layer is 6.5 μm-15 μm.

[0263] 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.

[0264] 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.

[0265] In some embodiments, the thickness of the corrosion-resistant layer is 5μm-20μm.

[0266] 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.

[0267] 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.

[0268] In some embodiments, the thickness of the waterproof layer is 50μm-120μm.

[0269] 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.

[0270] 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.

[0271] In some embodiments, the thickness of the flexible element 31 is 0.05mm-0.3mm.

[0272] 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.

[0273] In this embodiment, by setting the thickness of the flexible element 31 to 0.05mm-0.3mm, the heat exchange unit 30 made of the flexible element 31 has a certain structural strength while the overall thickness of the heat exchange unit 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.

[0274] In some embodiments, the thickness of the flexible element 31 is 0.08 mm to 0.2 mm.

[0275] 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.

[0276] In this embodiment, by setting the thickness of the flexible element 31 to 0.08mm-0.2mm, the heat exchange unit 30 made of the flexible element 31 has a certain structural strength, while further reducing the overall thickness of the heat exchange unit 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.

[0277] In some embodiments, the elastic modulus of the flexible member 31 is 0.1 MPa-10000 MPa.

[0278] 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.

[0279] 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.

[0280] 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 unit 30 and also has a certain deformation capability. This can improve the fit between the heat exchange unit 30 and the housing assembly 20 and / or the battery assembly / cell assembly 10, thereby increasing the effective heat exchange area between the heat exchange unit 30 and the housing assembly 20 and / or the battery assembly / cell assembly 10, and thus improving the heat exchange efficiency and heat exchange effect of the heat exchange unit 30.

[0281] It should be noted that the thickness and elastic modulus of the flexible component 31 can be measured using a micrometer, force gauge, or vernier caliper.

[0282] 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.

[0283] 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: The housing assembly has a first receiving cavity inside; A battery cell assembly is disposed within the first receiving cavity; A heat exchange unit is configured to exchange heat with the battery cell assembly; the heat exchange unit includes a flexible heat exchange unit having at least one flexible flow channel portion forming a heat exchange flow channel. An adjustment component that presses the flexible flow channel portion to adjust the cross-sectional area of ​​at least one of the heat exchange channels.

2. The battery device according to claim 1, wherein, The regulating component is disposed in the heat exchange unit, and the regulating component is configured to control the size of the cross-sectional area of ​​at least one of the heat exchange channels.

3. The battery device according to claim 2, wherein, The regulating assembly includes at least two control elements, each corresponding to a different heat exchange channel, and the at least two control elements can compress the heat exchange channel by moving.

4. The battery device according to claim 3, wherein, The adjustment assembly further includes a connector, one end of each of the control elements is connected to the connector, the free end of each of the control elements is used to compress the heat exchange channel, and the distance between the free end of at least one control element and the connector is different from the distance between the free end of the other control elements and the connector.

5. The battery device according to claim 3, wherein, The adjustment component also includes a signal acquisition device and an adjustment structure. The signal acquisition device is used to acquire temperature information of different regions of the battery cell assembly, and the adjustment structure is used to control the compression amount of the heat exchange channel by the control element according to the temperature information.

6. The battery device according to claim 2, wherein, The regulating component includes a temperature controller, which is disposed between the battery cell assembly and the heat exchange unit. The arrangement direction of the battery cell assembly, the temperature controller, and the heat exchange unit is defined as a first direction. When the temperature of the battery cell assembly rises, the temperature controller absorbs heat and expands in a direction perpendicular to the first direction, and contracts in the first direction, thereby reducing the compression of the heat exchange channel by the temperature controller.

7. The battery device according to any one of claims 1-6, wherein, At least one of the heat exchange channels has a width different from the widths of the other heat exchange channels.

8. The battery device according to any one of claims 1-7, wherein, The flexible heat exchange unit includes at least two flexible elements, which are stacked and at least one heat exchange channel is formed between the flexible elements. The at least one heat exchange channel is used to conduct heat exchange medium, which is used to exchange heat with the battery cell assembly.

9. The battery device according to claim 8, wherein, The at least two flexible components are configured as metal plasticized films.

10. The battery device according to claim 8, wherein, The at least two flexible components are configured as aluminum-plastic films.

11. The battery device according to any one of claims 8-10, wherein, The flexible component has a layered structure, comprising a metal layer and a non-metal layer, which are stacked sequentially.

12. The battery device according to claim 11, wherein, The metal layer includes one or more of aluminum foil, copper foil, and steel foil.

13. The battery device according to claim 11 or 12, wherein, The non-metallic layer includes one or more of polypropylene, polyvinyl chloride, and polyethylene.

14. The battery device according to any one of claims 11-13, wherein, The non-metallic layer is a hot-melt layer.

15. The battery device according to any one of claims 8-14, wherein, The flexible component has a layered structure, comprising a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged sequentially, with the waterproof layer being closer to the heat exchange channel than the corrosion-resistant layer.

16. The battery device according to claim 15, wherein, The thickness of the isolation layer is 6.5μm-100μm.

17. The battery device according to claim 16, wherein, The thickness of the isolation layer is 6.5μm-15μm.

18. The battery device according to any one of claims 15-17, wherein, The thickness of the corrosion-resistant layer is 5μm-20μm.

19. The battery device according to any one of claims 15-18, wherein, The thickness of the waterproof layer is 50μm-120μm.

20. The battery device according to any one of claims 8-19, wherein, The thickness of the flexible component is 0.05mm-0.3mm.

21. The battery device according to claim 20, wherein, The thickness of the flexible component is 0.08mm-0.2mm.

22. The battery device according to any one of claims 8-21, wherein, The elastic modulus of the flexible component is 0.1 MPa-10000 MPa.

23. The battery device according to any one of claims 8-22, wherein, The at least two flexible elements include a hot-pressed region, which is configured such that the at least two flexible elements are formed by hot pressing, and the hot-pressed region divides the heat exchange unit to form the at least one heat exchange channel.

24. A heat exchange unit, wherein the heat exchange unit is the heat exchange unit of the battery device according to any one of claims 1-23, and the heat exchange unit is configured to exchange heat with the battery cell assembly.

25. An electrical device comprising a battery device according to any one of claims 1-23 or a heat exchange unit according to claim 24.

26. An energy storage device comprising a battery device according to any one of claims 1-23 or a heat exchange unit according to claim 24.

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