Battery device and electric device

Abstract

The embodiment of the invention provides a battery device and a power utilization device. The battery device comprises a box body, a first bonding layer, a heat management part and a plurality of battery cells. The plurality of battery cells are arranged along a first direction. The case accommodates a plurality of battery cells, the case includes a first wall carrying the battery cells in a second direction, the second direction intersecting the first direction. At least a portion of the first adhesive layer is located between the battery cell and the first wall and connects the battery cell and the first wall. The heat management component comprises a heat exchange part and a shielding part, at least part of the heat exchange part is arranged between two adjacent single batteries in the first direction, the shielding part is connected with the heat exchange part, the shielding part protrudes out of the surface, facing the single batteries in the first direction, of the heat exchange part, and at least part of the shielding part is located between the single batteries and the first wall in the second direction. The service life of the battery device can be prolonged.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery device and an electrical device. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] Battery devices are widely used in portable electronic devices, electric vehicles, power tools, drones, energy storage devices, and other fields. In the development of battery technology, the lifespan of battery devices is a crucial issue. Therefore, extending the lifespan of battery devices is a pressing technical problem that needs to be solved in battery technology. Summary of the Invention

[0004] This application provides a battery device and an electrical device to extend the service life of the battery device.

[0005] In a first aspect, embodiments of this application provide a battery device, including a housing, a first adhesive layer, a thermal management component, and a plurality of battery cells; the plurality of battery cells are arranged along a first direction; the housing accommodates the plurality of battery cells, the housing includes a first wall, the first wall carries the plurality of battery cells along a second direction, the second direction intersects the first direction; at least a portion of the first adhesive layer is located between the battery cells and the first wall, and connects the battery cells and the first wall; the thermal management component includes a heat exchange portion and a shielding portion, along the first direction, at least a portion of the heat exchange portion is disposed between two adjacent battery cells, the shielding portion is connected to the heat exchange portion, the shielding portion protrudes from the surface of the heat exchange portion facing the battery cells along the first direction, and along the second direction, at least a portion of the shielding portion is located between the battery cells and the first wall.

[0006] In the above technical solution, the connection strength between the battery cell and the first wall is improved by using a first adhesive layer, thereby enhancing the positional stability of the battery cell within the housing. During the cycling process of the battery cell, the battery cell tends to expand or contract along the first direction. By providing a shielding part connected to the heat exchange part, and with at least a portion of the shielding part located between the battery cell and the first wall, the positional stability of the heat exchange part is improved, enhancing its temperature management effect on the battery cell. Furthermore, the shielding part can shield the first adhesive layer, reducing the risk of the first adhesive layer entering between two adjacent battery cells along the first direction. This reduces the risk of damage caused by the battery cell pressing against the first adhesive layer along the first direction, extending the service life of the battery device.

[0007] In some embodiments, along a first direction, a receiving space is formed between two adjacent battery cells, and at least a portion of the heat exchanger is received within the receiving space. Along a second direction, an opening is formed at the end of the receiving space facing the first wall, and a shielding portion covers at least a portion of the opening. The area of ​​the opening covered by the shielding portion is S1, and the area of ​​the opening is S2, with 80% ≤ S1 / S2 ≤ 1. S1 / S2 ≥ 80% improves the shielding effect of the shielding portion on the first adhesive layer, thereby reducing the risk of the first adhesive layer entering between two adjacent battery cells along the first direction. S1 / S2 ≤ 1 reduces the material usage of the shielding portion, saving material costs. Therefore, 80% ≤ S1 / S2 ≤ 1 balances improving the shielding effect of the shielding portion on the first adhesive layer and reducing the material usage of the shielding portion, extending the lifespan of the battery cells and saving material costs for the shielding portion.

[0008] In some embodiments, the shielding portion completely covers the opening. This further enhances the shielding effect of the shielding portion on the first adhesive layer, thereby further reducing the risk of the first adhesive layer entering between two adjacent battery cells along the first direction and extending the service life of the battery cells.

[0009] In some embodiments, along the second direction, the battery cell has a first surface facing the first wall, the first surface including a connection area covered by a shielding portion and an exposed area not covered by the shielding portion; along the second direction, the shielding portion has a second surface facing away from the battery cell, and a first adhesive layer covers at least a portion of the exposed area and at least a portion of the second surface. Thus, both the exposed area and the shielding portion are connected to the first wall via the first adhesive layer, which improves the connection strength between the thermal management component and the battery cell and the first wall, reduces the risk of the thermal management component and the battery cell detaching from the first wall, and improves the structural stability of the battery device.

[0010] In some embodiments, the first adhesive layer covers the entire exposed area. This improves the connection strength between the battery cell and the first wall, reducing the risk of the battery cell detaching from the first wall.

[0011] In some embodiments, the first adhesive layer covers the entire second surface. This improves the connection strength between the thermal management component and the first wall, reducing the risk of the thermal management component detaching from the first wall.

[0012] In some embodiments, the first adhesive layer covers the entire exposed area and the entire second surface. This reduces the risk of battery cells and thermal management components detaching from the first wall, improving the structural stability of the battery device.

[0013] In some embodiments, along a first direction, the shielding portion includes a first side surface, which is connected to a second surface, and a first adhesive layer covers at least a portion of the first side surface. This increases the contact area between the first adhesive layer and the shielding portion, thereby improving the connection strength between the first adhesive layer and the shielding portion and the first wall, and reducing the risk of the shielding portion detaching from the first wall.

[0014] In some embodiments, along a third direction, the shielding portion further includes a second side surface, which is connected to a second surface. A first adhesive layer covers at least a portion of the second side surface, and the first direction, second direction, and third direction are perpendicular to each other. This further increases the contact area between the first adhesive layer and the shielding portion, thereby further enhancing the connection strength between the first adhesive layer and the shielding portion and the first wall, and reducing the risk of the shielding portion detaching from the first wall.

[0015] In some embodiments, the ratio of the surface area of ​​the exposed area to the surface area of ​​the first surface is 0.5-1. This allows the battery cell to have a larger exposed area connected to the first adhesive layer, thereby increasing the connection strength between the first adhesive layer and the exposed area and reducing the risk of the battery cell detaching from the first wall.

[0016] In some embodiments, the Shore hardness of the first adhesive layer is 40-60. A Shore hardness greater than or equal to 40 in the first adhesive layer can improve the mechanical strength and thermal conductivity of the first adhesive layer; a Shore hardness less than or equal to 60 in the first adhesive layer can improve the adhesive performance of the first adhesive layer and the connection strength between the first adhesive layer and the battery cell and the first wall; therefore, a Shore hardness of 40-60 in the first adhesive layer can balance the thermal conductivity and adhesive performance of the first adhesive layer.

[0017] In some embodiments, the first wall has a third surface facing the battery cell, and the third surface is provided with a groove, into which the shielding portion is at least partially embedded. By embedding at least part of the shielding portion into the groove, the thickness between the battery cell and the third surface can be adjusted, allowing for a thinner first adhesive layer between the third surface and the battery cell, which is beneficial for improving the connection strength between the battery cell and the first wall.

[0018] In some embodiments, the battery device further includes a second adhesive layer, which is at least partially located between the battery cell and the heat exchanger along the first direction, and connects the battery cell and the heat exchanger. This improves the connection strength between the battery cell and the thermal management component, reduces the risk of the thermal management component detaching from the battery cell, and further enhances the positional stability of the battery cell within the housing.

[0019] In some embodiments, the Shore hardness of the second adhesive layer is 10-25. A Shore hardness greater than or equal to 10 can improve the cohesive strength and shear strength of the second adhesive layer; a Shore hardness less than or equal to 25 can improve the flexibility of the second adhesive layer and reduce the risk of damage to the battery cells caused by the second adhesive layer compressing the battery cells. Therefore, a Shore hardness of 10-25 for the second adhesive layer can balance improving both the strength and flexibility of the second adhesive layer.

[0020] In some embodiments, along the second direction, a shielding portion is disposed at the end of the heat exchange portion facing the first wall. This reduces the difficulty of installing the thermal management components and battery cells.

[0021] In some embodiments, the plurality of battery cells includes a first battery cell and a second battery cell arranged adjacent to each other along a first direction. A heat exchange portion is at least partially located between the first and second battery cells. Along a second direction, a portion of a shielding portion is located between the first battery cell and a first wall, and another portion of the shielding portion is located between the second battery cell and the first wall. Thus, the shielding portions on both sides of the heat exchange portion along the first direction are at least partially located between the battery cells and the first wall, reducing the risk of the first adhesive layer entering between the heat exchange portion and the battery cells. This reduces the risk of damage caused by the battery cells squeezing the first adhesive layer along the first direction, extending the service life of the battery device.

[0022] In some embodiments, the thermal management component has a flow channel for containing a heat exchange medium to manage the temperature of the battery cells; the flow channel is entirely located within the heat exchange section. The heat exchange medium is contained within the flow channel of the heat exchange section to facilitate heat exchange between the battery cells and the heat exchange section, reducing the risk of thermal runaway due to excessively high battery cell temperatures and improving the reliability of the battery device.

[0023] In some embodiments, the thermal management component has flow channels for containing heat exchange medium to manage the temperature of the battery cells; a portion of the flow channels is located in the heat exchange section, and another portion is located in the shielding section. Thus, flow channels are present in both the heat exchange section and the shielding section, thereby enhancing the thermal management component's ability to manage the temperature of the battery cells, further reducing the risk of thermal runaway due to excessively high battery cell temperatures, and improving the reliability of the battery device.

[0024] In some embodiments, the battery cell includes a housing, and along a first direction, the housing has a first outer surface, which is the surface with the largest area among the outer surfaces of the housing. During the cycling process of the battery cell, the deformation of the first outer surface is typically large. By providing a shielding portion connected to the heat exchange portion and located at least partially between the battery cell and the first wall, the shielding portion can reduce the amount of the first adhesive layer in contact with the first outer surface, thereby reducing the risk of damage to the battery cell and extending the service life of the battery cell.

[0025] Secondly, embodiments of this application provide an electrical device, including a battery device as provided in any embodiment of the first aspect. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments; Figure 2 Exploded views of battery devices provided in some embodiments of this application; Figure 3 Exploded views of a single battery cell provided in some embodiments of this application; Figure 4 Exploded views of a battery device provided in some embodiments of this application; Figure 5 This is an assembly diagram of a battery cell and a thermal management component provided in some embodiments of this application; Figure 6 This is a schematic diagram of the structure of a thermal management component provided in some embodiments of this application; Figure 7 This is a schematic diagram illustrating the installation of a battery cell and thermal management components according to some embodiments of this application; Figure 8 This is an assembly diagram of a battery cell and a thermal management component provided for some embodiments of this application; Figure 9 This is an assembly diagram of a battery cell and a thermal management component provided in some embodiments of this application; Figure 10 A schematic diagram illustrating the installation of a battery cell and a thermal management component, provided for further embodiments of this application; Figure 11 for Figure 10 A magnified view of a portion of region A in the middle; Figure 12 This is a schematic diagram illustrating the installation of a battery cell and a thermal management component in some embodiments of this application; Figure 13 for Figure 12 A magnified view of a portion of region B in the middle; Figure 14 This is a schematic diagram showing the installation of a battery cell and thermal management components provided for other embodiments of this application.

[0028] Icons: 1-Outer casing; 11-Housing shell; 12-End cap; 13-First outer surface; 2-Electrode assembly; 21-Taper; 3-Electrode terminal; 4-First surface; 41-Connection area; 42-Exposed area; 10-Battery cell; 20-Casing; 201-First casing; 202-Second casing; 203-First wall; 2031-Third surface; 20311-Groove; 30-First adhesive layer; 40-Thermal management component ; 401-Heat exchange section; 402-Shielding section; 4021-Second surface; 4022-First side surface; 4023-Second side surface; 403-Inlet pipe; 404-Outlet pipe; 405-Flow channel; 50-Accommodation space; 501-Opening; 60-Second adhesive layer; 100-Battery device; 200-Controller; 300-Motor; 1000-Vehicle; X-First direction; Z-Second direction; Y-Third direction. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0031] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0034] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0035] In this application, "multiple" means two or more (including two).

[0036] In this embodiment of the application, 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.

[0037] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0038] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. 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, reduces the risk of short circuits while allowing active ions to pass through.

[0039] 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.

[0040] 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.

[0041] As an example, the positive electrode current collector can be a foil or a composite current collector. For example, as a foil, it can be aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, or titanium, etc. Composite current collectors can include a polymer material base layer and a metal layer. Composite current collectors can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0042] 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 application 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) 0.85 Co 0.15 Al 0.05 At least one of O2 and its modified compounds.

[0043] In some embodiments, the positive electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, or foam alloys, 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, lithium source material, potassium metal, or sodium metal may also be filled and / or deposited within the foamed metal, where the lithium source material is lithium metal and / or a lithium-rich material.

[0044] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0045] As an example, the negative electrode current collector can be a foil, a foamed metal, or a composite current collector. For example, as a foil, it can be silver-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, or titanium, etc. Foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloys, etc. Composite current collectors can include a polymer material base layer and a metal layer. Composite current collectors 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.).

[0046] 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.

[0047] 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.

[0048] 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 application is not limited to these materials, and other conventional materials that can be used as battery negative electrode active materials may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0049] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0050] In some embodiments, the separator is a separator membrane. The separator membrane can be any known porous structure separator membrane with good chemical and mechanical stability.

[0051] As an example, the material of the separator may include at least one of glass fiber, nonwoven fabric, polyethylene, polypropylene, and polyvinylidene fluoride. The separator may be a single-layer film or a multi-layer composite film. When the separator is a multi-layer composite film, the materials of each layer may be the same or different. The separator may be a separate component located between the positive and negative electrodes, or it may be attached to the surfaces of the positive and negative electrodes.

[0052] 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.

[0053] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The electrolyte can be liquid, gel-like, or solid. Liquid electrolytes include electrolyte salts and solvents.

[0054] In some embodiments, the electrolyte salt may include 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.

[0055] In some embodiments, the solvent may include at least one selected from 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 selected from 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.

[0056] Among them, the gel electrolyte includes a polymer as the electrolyte backbone network, combined with an ionic liquid - lithium salt.

[0057] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0058] As an example, polymer solid electrolytes can be polyethers (polyoxyethylene), polysiloxanes, polycarbonates, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids-lithium salts, cellulose, etc.

[0059] As an example, inorganic solid electrolytes may include 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 phosphate sulfide, silver sulfide germanium ore), amorphous sulfides), halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes.

[0060] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0061] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0062] In some implementations, the electrode assembly is a stacked structure.

[0063] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0064] 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.

[0065] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0066] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0067] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0068] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0069] 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.

[0070] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0071] As an example, a 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.

[0072] The battery device mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity.

[0073] In some embodiments, the battery device can be a battery module, and when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0074] In some embodiments, the battery device may be a battery pack, which includes a housing and individual battery cells, with the individual battery cells or battery modules housed within the housing.

[0075] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0076] In some embodiments, the battery device may be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0077] The battery device may include a housing and multiple battery cells arranged along a first direction. During the cycling process of the battery cells, the battery cells tend to expand or contract along their arrangement direction. To make the position of the battery cells within the housing more stable, an adhesive layer can be provided between the wall of the housing connecting the battery cells and the battery cells to bond the battery cells to the housing. However, the adhesive layer can easily become embedded between two adjacent battery cells along the first direction. During battery cell cycling, the outer shell of the battery cells accommodates and compresses the adhesive layer, which can easily cause damage to the battery cells.

[0078] In view of this, in order to reduce the risk of damage to individual battery cells in the battery device, embodiments of this application provide a battery device including a housing, a first adhesive layer, a thermal management component, and multiple battery cells. The multiple battery cells are arranged along a first direction. The housing accommodates the multiple battery cells and includes a first wall that supports the battery cells along a second direction, intersecting the first direction. At least a portion of the first adhesive layer is located between the battery cells and the first wall, connecting the battery cells and the first wall. The thermal management component includes a heat exchange portion and a shielding portion. Along the first direction, at least a portion of the heat exchange portion is disposed between two adjacent battery cells. The shielding portion is connected to the heat exchange portion and protrudes from the surface of the heat exchange portion facing the battery cells along the first direction. Along the second direction, at least a portion of the shielding portion is located between the battery cells and the first wall.

[0079] In such a battery device, by providing a shielding part connected to the heat exchange part, and by providing at least a portion of the shielding part between the battery cell and the first wall, on the one hand, the positional stability of the heat exchange part can be improved, and the temperature management effect of the heat exchange part on the battery cell can be improved; on the other hand, the shielding part can shield the first adhesive layer, thereby reducing the risk of the first adhesive layer entering between two adjacent battery cells along the first direction, thereby reducing the risk of the battery cell being damaged by squeezing the first adhesive layer along the first direction, and extending the service life of the battery device.

[0080] The technical solutions described in the embodiments of this application are applicable to battery devices and electrical devices that use battery devices.

[0081] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools. 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. Spacecraft include airplanes, rockets, space shuttles, and spacecraft. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. 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.

[0082] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0083] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 may be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000.

[0084] The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0085] In some embodiments of this application, 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.

[0086] Please refer to Figure 2 , Figure 2The following is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 may include a housing 20 and a battery cell 10, wherein the housing 20 is used to house the battery cell 10.

[0087] The housing 20 has an enclosed space inside for accommodating the battery cell 10. The housing 20 can have various structures. In some embodiments, the housing 20 may include a first housing 201 and a second housing 202, which are interlocked. The first housing 201 and the second housing 202 can have various shapes, such as cuboids or cylinders. The first housing 201 can be a hollow structure open on one side, and the second housing 202 can also be a hollow structure open on one side. The open side of the second housing 202 interlocks with the open side of the first housing 201, thus forming a housing 20 with an enclosed space. Alternatively, the first housing 201 can be a hollow structure open on one side, and the second housing 202 can be a plate-like structure, with the second housing 202 interlocked with the open side of the first housing 201, thus forming a housing 20 with a receiving cavity.

[0088] In the battery device 100, there can be one or more battery cells 10. If there are multiple battery cells 10, they can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 10 are connected in both series and parallel. Alternatively, multiple battery cells 10 can be first connected in series, parallel, or in a mixed manner to form a battery module, and then multiple battery modules can be connected in series, parallel, or in a mixed manner to form a whole, which is then housed within the housing 20. Another option is that all battery cells 10 can be directly connected in series, parallel, or in a mixed manner, and then the whole consisting of all battery cells 10 is housed within the housing 20.

[0089] In some embodiments, the battery device 100 may further include a busbar component, through which multiple battery cells 10 can be electrically connected to each other to achieve series, parallel, or mixed connection of multiple battery cells 10. The busbar component may be a metallic conductor, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0090] Please refer to Figure 3 , Figure 3 This is an exploded view of a battery cell 10 provided in some embodiments of this application. The battery cell 10 may include a housing 1 and an electrode assembly 2, the electrode assembly 2 being housed within the housing 1.

[0091] In some embodiments, the housing 1 may include a housing 11 and an end cap 12, the housing 11 having an opening, and the end cap 12 closing the opening of the housing 11. Here, "closing" refers to covering or shutting off, and can be either sealed or unsealed.

[0092] The housing 11 is a component used to house the electrode assembly 2. The housing 11 can be a hollow structure with an opening at one end, or it can be a hollow structure with openings at both opposite ends. The housing 11 can have various shapes, such as cylindrical or cuboid. The housing 11 can be made of various materials, such as copper, iron, aluminum, steel, or aluminum alloy. The electrode assembly 2 can be partially or completely housed within the housing 11.

[0093] The end cap 12 and the housing 11 together define a receiving space for accommodating the electrode assembly 2 and other components. The end cap 12 can be connected to the housing 11 by welding, rolling, or other methods to close the opening of the housing 11. The shape of the end cap 12 can be adapted to the shape of the housing 11. For example, if the housing 11 is a cuboid structure, the end cap 12 can be a rectangular plate structure adapted to the housing 11; or if the housing 11 is a cylindrical structure, the end cap 12 can be a circular plate structure adapted to the housing 11. The end cap 12 can also be made of various materials, such as copper, iron, aluminum, steel, or aluminum alloy. The end cap 12 and the housing 11 can be made of the same or different materials.

[0094] There can be one electrode assembly 2 or multiple electrode assemblies.

[0095] In an embodiment where the housing 11 has an opening at one end, one end cap 12 may be provided accordingly. In an embodiment where the housing 11 has openings at both opposite ends, two end caps 12 may be provided accordingly. The two end caps 12 respectively close the two openings of the housing 11, and the two end caps 12 and the housing 11 together define the receiving space.

[0096] In some embodiments, the battery cell 10 may further include electrode terminals 3, which are disposed on the housing 1 and are used for electrical connection with the tabs 21 of the electrode assembly 2 to input or output electrical energy of the battery cell 10. The electrode terminals 3 may be disposed on the housing 11 of the housing 1 or on the end cap 12 of the housing 1. The electrode terminals 3 and the tabs 21 may be directly connected, for example, by welding. Alternatively, the electrode terminals 3 and the tabs 21 may be indirectly connected, for example, through a current collector. The current collector may be a metallic conductor, such as copper, iron, aluminum, steel, or aluminum alloy.

[0097] As an example, such as Figure 3 As shown, one end of the housing 11 forms an opening, and there is one end cap 12 in the housing 1, which closes one opening of the housing 11. Two electrode terminals 3 are provided on the end cap 12, which are a positive electrode terminal and a negative electrode terminal, respectively. The end of the electrode assembly 2 facing the end cap 12 has a positive electrode tab and a negative electrode tab. The positive electrode terminal is electrically connected to the positive electrode tab, and the negative electrode terminal is electrically connected to the negative electrode tab.

[0098] Please refer to Figures 4-7 , Figure 4 Exploded view of a battery device 100 provided in some embodiments of this application; Figure 5 This is an assembly diagram of the battery cell 10 and the thermal management component 40 provided in some embodiments of this application; Figure 6 This is a schematic diagram of the structure of the thermal management component 40 provided in some embodiments of this application; Figure 7 This is a schematic diagram illustrating the installation of a battery cell 10 and a thermal management component 40 according to some embodiments of this application. Embodiments of this application provide a battery device 100, including a housing 20, a first adhesive layer 30, a thermal management component 40, and a plurality of battery cells 10. The plurality of battery cells 10 are arranged along a first direction X. The housing 20 accommodates the plurality of battery cells 10 and includes a first wall 203 that supports the plurality of battery cells 10 along a second direction Z, where the second direction Z intersects the first direction X. At least a portion of the first adhesive layer 30 is located between the battery cells 10 and the first wall 203, connecting the battery cells 10 and the first wall 203. The thermal management component 40 includes a heat exchange portion 401 and a shielding portion 402. Along the first direction X, at least a portion of the heat exchange portion 401 is disposed between two adjacent battery cells 10. The shielding portion 402 is connected to the heat exchange portion 401 and protrudes from the heat exchange portion 401 onto the surface of the battery cell 10 along the first direction X. Along the second direction Z, at least a portion of the shielding portion 402 is located between the battery cell 10 and the first wall 203.

[0099] Multiple battery cells 10 are housed within a housing 20, and the first wall 203 of the housing 20 supports the multiple battery cells 10 along the second direction Z. Alternatively, the multiple battery cells 10 may be arranged only along the first direction X and housed within the housing 20; or the multiple battery cells 10 may be arranged along a third direction Y to form a battery cell 10 assembly, and the battery cell 10 assembly may be arranged along the first direction X and housed within the housing 20. The first direction X, the second direction Z, and the third direction Y are not coplanar and intersect each other; exemplarily, the first direction X, the second direction Z, and the third direction Y are perpendicular to each other.

[0100] The first adhesive layer 30 connects the first wall 203 and the plurality of battery cells 10. The entire first adhesive layer 30 may be located between the battery cells 10 and the first wall 203 to connect the battery cells 10 and the first wall 203. Alternatively, only a portion of the first adhesive layer 30 may be located between the battery cells 10 and the first wall 203 to connect the battery cells 10 and the first wall 203; another portion of the first adhesive layer 30 may be located between the shielding portion 402 and the first wall 203 or in other areas within the housing 20 away from the thermal management component 40 and the battery cells 10.

[0101] The heat exchange section 401 of the thermal management component 40 can exchange heat with the battery cell 10 to manage the temperature of the battery cell 10. The thermal management component 40 can be disposed between every two adjacent battery cells 10; alternatively, it can be disposed between partially adjacent battery cells 10. Along the first direction X, the entire heat exchange section 401 can be arranged with the battery cell 10 along the first direction X, or only a portion of the heat exchange section 401 can be arranged with the battery cell 10 along the first direction X. The heat exchange section 401 can be in direct contact with the battery cell 10; alternatively, the heat exchange section 401 can be in indirect contact with the battery cell 10, for example, the heat exchange section 401 can be connected to the battery cell 10 via flexible thermally conductive adhesive.

[0102] The shielding part 402 and the heat exchange part 401 can be integrally formed; for example, the shielding part 402 and the heat exchange part 401 can be integrally injection molded. Alternatively, the shielding part 402 and the heat exchange part 401 can be separately arranged and connected; for example, the shielding part 402 and the heat exchange part 401 can be welded together. Along the second direction Z, the shielding part 402 can be located at the end of the heat exchange part 401, or it can be at a distance from the end of the heat exchange part 401.

[0103] Along the first direction X, the heat exchange section 401 has a surface facing the battery cell 10. When the heat exchange section 401 is located between two battery cells 10, the heat exchange section 401 has two surfaces facing the battery cells 10, and the shielding portion 402 protrudes from these two surfaces along the first direction X. When the battery cell 10 is disposed on only one side of the heat exchange section 401 along the first direction X, the heat exchange section 401 has one surface facing the battery cell 10, and the shielding portion 402 protrudes from this surface along the first direction X.

[0104] Along the second direction Z, the entire shielding portion 402 may be located between the battery cell 10 and the first wall 203. Alternatively, only a portion of the shielding portion 402 may be located between the battery cell 10 and the first wall 203. Exemplarily, in an embodiment where the shielding portion 402 is located at the end of the heat exchange portion 401 along the second direction Z, a portion of the shielding portion 402 is located between the battery cell 10 and the first wall 203; another portion is located between the heat exchange portion 401 and the first wall 203. In an embodiment where the shielding portion 402 is at a distance from the end of the heat exchange portion 401 along the second direction Z, the shielding portion 402 protrudes from the end of the heat exchange portion 401, and the entire shielding portion 402 may be located between the battery cell 10 and the first wall 203.

[0105] In this embodiment, the first adhesive layer 30 connects the battery cell 10 and the first wall 203, thereby improving the connection strength between the battery cell 10 and the first wall 203 and thus enhancing the positional stability of the battery cell 10 within the housing 20. During the cycling process of the battery cell 10, the battery cell 10 is prone to expand or contract along the first direction X. By providing a shielding part 402 connected to the heat exchange part 401, and with at least a portion of the shielding part 402 located between the battery cell 10 and the first wall 203, on the one hand, the positional stability of the heat exchange part 401 can be improved, enhancing the heat exchange part 401's temperature management effect on the battery cell 10; on the other hand, the shielding part 402 can shield the first adhesive layer 30, reducing the risk of the first adhesive layer 30 entering between two adjacent battery cells 10 along the first direction X, thereby reducing the risk of the battery cell 10 being damaged by squeezing the first adhesive layer 30 along the first direction X and extending the service life of the battery device 100.

[0106] In some embodiments, the housing 20 further includes side beams, which are arranged along a first direction X with the battery cells 10, and the battery cells 10 are located on the same side of the side beams. The side beams can be the walls of the housing 20 or expansion beams. Along the first direction X, a thermal management component 40 can also be provided between the battery cell 10 closest to the side beam and the side beam. The heat exchange portion 401 of the thermal management component 40 separates the side beam and the battery cell 10, and at least a portion of the shielding portion 402 of the thermal management component 40 is located between the battery cell 10 and the first wall 203 along a second direction Z.

[0107] In some embodiments, please continue to refer to Figures 4-7 And further refer to Figure 8 , Figure 8 This is a schematic diagram illustrating the assembly of a battery cell 10 and a thermal management component 40 according to further embodiments of this application. Along the first direction X, a receiving space 50 is formed between two adjacent battery cells 10, and at least a portion of the heat exchange section 401 is received within the receiving space 50. Along the second direction Z, an opening 501 is formed at the end of the receiving space 50 facing the first wall 203, and a blocking portion 402 covers at least a portion of the opening 501. The area of ​​the opening 501 covered by the blocking portion 402 is S1, and the area of ​​the opening 501 is S2, where 80% ≤ S1 / S2 ≤ 1.

[0108] The accommodating space 50 is located between two adjacent battery cells 10. The width of the accommodating space 50 is the distance between two adjacent battery cells 10 along the first direction X; the length of the accommodating space 50 is the dimension of the battery cell 10 along the third direction Y, and the accommodating space 50 is the area enclosed by two adjacent battery cells 10. In embodiments where multiple battery cells 10 are arranged along the third direction Y, adjacent accommodating spaces 50 are connected to form accommodating spaces 50 for multiple battery cells 10.

[0109] Each battery cell 10 has a first surface 4 facing the first wall 203, and the positions where the first surfaces 4 of two adjacent battery cells 10 intersect with the receiving space 50 form an opening 501. The shielding part 402 may completely cover the opening 501, or the shielding part 402 may only cover a part of the opening 501.

[0110] S1 / S2 can be any one of the following values ​​or any value between the two: 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 1.

[0111] The entire heat exchange section 401 may be contained within the containing space 50; or only a portion of the heat exchange section 401 may be contained within the containing space 50.

[0112] In this embodiment, S1 / S2≥80% improves the shielding effect of the shielding portion 402 on the first adhesive layer 30, thereby reducing the risk of the first adhesive layer 30 entering between two adjacent battery cells 10 along the first direction X; S1 / S2≤1 reduces the material usage of the shielding portion 402, saving material costs. Therefore, 80%≤S1 / S2≤1 can balance improving the shielding effect of the shielding portion 402 on the first adhesive layer 30 and reducing the material usage of the shielding portion 402, extending the service life of the battery cell 10 and saving material costs of the shielding portion 402.

[0113] In some embodiments, please refer to Figure 9 , Figure 9 This is an assembly diagram of the battery cell 10 and thermal management component 40 provided in some embodiments of this application. The shielding portion 402 completely covers the opening 501.

[0114] Along the third direction Y, the size of the blocking portion 402 may be the same as the size of the opening 501, so that the blocking portion 402 completely covers the opening 501; or the size of the blocking portion 402 may be larger than the size of the opening 501, so as to cover the opening 501. For example, as Figure 9 As shown, the size of the blocking part 402 along the third direction Y is the same as the size of the opening 501, so that the blocking part 402 completely covers the opening 501.

[0115] In this embodiment, the shielding effect of the shielding portion 402 on the first adhesive layer 30 is further improved, thereby further reducing the risk of the first adhesive layer 30 entering between two adjacent battery cells 10 along the first direction X, and extending the service life of the battery cells 10.

[0116] In some embodiments, please refer to Figure 10 , Figure 10 This is a schematic diagram illustrating the installation of a battery cell 10 and a thermal management component 40 according to further embodiments of this application. Along the second direction Z, the battery cell 10 has a first surface 4 facing the first wall 203. The first surface 4 includes a connection area 41 covered by a shielded portion 402 and an exposed area 42 not covered by the shielded portion 402. Along the second direction Z, the shielded portion 402 has a second surface 4021 facing away from the battery cell 10. A first adhesive layer 30 covers at least a portion of the exposed area 42 and at least a portion of the second surface 4021.

[0117] The shielding part 402 may be in direct contact with the connecting area 41; or the shielding part 402 may be in indirect contact with the connecting area 41, for example, a portion of the first adhesive layer 30 may be located between the shielding part 402 and the connecting area 41.

[0118] The exposed area 42 and the connecting area 41 are arranged along the first direction X. In the projection plane perpendicular to the second direction Z, the orthographic projection of the exposed area 42 does not overlap with the orthographic projection of the shielding part 402.

[0119] The first adhesive layer 30 covers the exposed area 42 and the second surface 4021 to achieve the connection between the battery cell 10, the thermal management component 40, and the first wall 203. The first adhesive layer 30 may cover only a portion of the exposed area 42, or it may cover the entire exposed area 42. Similarly, the first adhesive layer 30 may cover only a portion of the second surface 4021, or it may cover the entire second surface 4021.

[0120] In this embodiment, both the exposed area 42 and the shielding part 402 are connected to the first wall 203 through the first adhesive layer 30, which can improve the connection strength between the thermal management component 40 and the battery cell 10 and the first wall 203, reduce the risk of the thermal management component 40 and the battery cell 10 detaching from the first wall 203, and improve the structural stability of the battery device 100.

[0121] In some embodiments, the first adhesive layer 30 covers the entire exposed area 42.

[0122] Multiple battery cells 10 are installed inside the housing 20. The exposed area 42 of each battery cell 10 is covered by the first adhesive layer 30 to improve the connection between the battery cell 10 and the first wall 203.

[0123] In this embodiment, the connection strength between the battery cell 10 and the first wall 203 can be improved, reducing the risk of the battery cell 10 detaching from the first wall 203.

[0124] In some embodiments, the first adhesive layer 30 covers the entire second surface 4021.

[0125] Inside the housing 20, the second surface 4021 of the shielding portion 402 of each thermal management component 40 is covered by the first adhesive layer 30.

[0126] In this embodiment, the connection strength between the thermal management component 40 and the first wall 203 can be improved, reducing the risk of the thermal management component 40 detaching from the first wall 203.

[0127] In some embodiments, the first adhesive layer 30 covers the entire exposed area 42 and the entire second surface 4021.

[0128] In this embodiment, the risk of the battery cell 10 and the thermal management component 40 detaching from the first wall 203 can be reduced, thereby improving the structural stability of the battery device 100.

[0129] In some embodiments, please refer to Figure 11 , Figure 11 for Figure 10 A partial enlarged view of region A. Along the first direction X, the shielding portion 402 includes a first side surface 4022, which is connected to a second surface 4021, and a first adhesive layer 30 covers at least a portion of the first side surface 4022.

[0130] Along the second direction Z, the battery cell 10 has a first surface 4 facing the first wall 203. A shielding portion 402 is located on the side of the first surface 4 facing the first wall 203. At least one side of the shielding portion 402 along the first direction X includes a first side surface 4022. (Example...) Figure 10 and Figure 11 As shown, the shielding portion 402 has first side surfaces 4022 on both sides along the first direction X. The first adhesive layer 30 covers at least a portion of the two first side surfaces 4022.

[0131] The first adhesive layer 30 may cover only a portion of the first side surface 4022; or the first adhesive layer 30 may cover the entire first side surface 4022.

[0132] In this embodiment, the contact area between the first adhesive layer 30 and the shielding portion 402 can be increased, thereby increasing the connection strength between the first adhesive layer 30 and the shielding portion 402 and the first wall 203, and reducing the risk of the shielding portion 402 detaching from the first wall 203.

[0133] In some embodiments, along the third direction Y, the occlusion portion 402 further includes a second side surface 4023 ( Figure 5 and Figure 6 As shown in the figure, the second side 4023 is connected to the second surface 4021, and the first adhesive layer 30 covers at least a portion of the second side 4023. The first direction X, the second direction Z and the third direction Y are perpendicular to each other.

[0134] Along the third direction Y, both sides of the shielding portion 402 have second side surfaces 4023. The first adhesive layer 30 may cover only a portion of the second side surface 4023, or the first adhesive layer 30 may cover the entire second side surface 4023.

[0135] In this embodiment, the contact area between the first adhesive layer 30 and the shielding portion 402 can be further increased, thereby further improving the connection strength between the first adhesive layer 30 and the shielding portion 402 and the first wall 203, and reducing the risk of the shielding portion 402 detaching from the first wall 203.

[0136] In some embodiments, the ratio of the surface area of ​​the exposed area 42 to the surface area of ​​the first surface 4 is 0.5-1.

[0137] The area covered by the shielding part 402 on the first surface 4 is less than half the surface area of ​​the first surface 4.

[0138] The ratio of the surface area of ​​the exposed area 42 to the surface area of ​​the first surface 4 can be any one of 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, or 1, or any value between the two.

[0139] In this embodiment, the battery cell 10 can have a large exposed area 42 connected to the first adhesive layer 30, thereby improving the connection strength between the first adhesive layer 30 and the exposed area 42 and reducing the risk of the battery cell 10 detaching from the first wall 203.

[0140] In some embodiments, the Shore hardness of the first adhesive layer 30 is 40-60.

[0141] The Shore hardness of the first adhesive layer 30 can be any one of 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60 or any value between two of them.

[0142] In this embodiment, the Shore hardness of the first adhesive layer 30 is greater than or equal to 40, which can improve the mechanical strength and thermal conductivity of the first adhesive layer 30; the Shore hardness of the first adhesive layer 30 is less than or equal to 60, which can improve the adhesive performance of the first adhesive layer 30 and the connection strength between the first adhesive layer 30 and the battery cell 10 and the first wall 203; therefore, a Shore hardness of 40-60 for the first adhesive layer 30 can balance the thermal conductivity and adhesive performance of the first adhesive layer 30.

[0143] In some embodiments, the first adhesive layer 30 may include epoxy resin, aluminum oxide, and filler; wherein the filler may include at least one of boron nitride, aluminum nitride, and aluminum hydroxide.

[0144] In some embodiments, please refer to Figure 12 and Figure 13 , Figure 12 This is a schematic diagram showing the installation of the battery cell 10 and the thermal management component 40 in some embodiments of this application; Figure 13 for Figure 12 A partial enlarged view of region B. The first wall 203 has a third surface 2031 facing the battery cell 10. The third surface 2031 is provided with a groove 20311, and the shielding part 402 is at least partially embedded in the groove 20311.

[0145] The entire shielding part 402 may be embedded in the groove 20311; or only a portion of the shielding part 402 may be embedded in the groove 20311, while the other portion may be located outside the groove 20311.

[0146] The groove 20311 can also accommodate the first adhesive layer 30, which can connect the groove wall of the groove 20311 with the second surface 4021, the first side surface 4022 and the second side surface 4023 of the shielding part 402.

[0147] In this embodiment, by embedding at least a portion of the shielding portion 402 into the groove 20311, the thickness between the battery cell 10 and the third surface 2031 can be adjusted, so that there can be a thinner first adhesive layer 30 between the third surface 2031 and the battery cell 10, which is beneficial to improving the connection strength between the battery cell 10 and the first wall 203.

[0148] In some embodiments, please refer to Figure 14 , Figure 14 This is a schematic diagram illustrating the installation of the battery cell 10 and the thermal management component 40 according to other embodiments of this application. The battery device 100 also includes a second adhesive layer 60, at least a portion of which is located between the battery cell 10 and the heat exchanger 401 along a first direction X, and connects the battery cell 10 and the heat exchanger 401.

[0149] The second adhesive layer 60 may be entirely located between the battery cell 10 and the heat exchange section 401, or only a portion of the second adhesive layer 60 may be located between the battery cell 10 and the heat exchange section 401. In some embodiments, the second adhesive layer 60 may be a flexible double-sided adhesive.

[0150] In this embodiment, by setting at least a portion of the second adhesive layer 60 between the battery cell 10 and the heat exchange part 401 and connecting the battery cell 10 and the heat exchange part 401, the connection strength between the battery cell 10 and the thermal management component 40 can be improved, the risk of the thermal management component 40 detaching from the battery cell 10 can be reduced, thereby further improving the positional stability of the battery cell 10 within the housing 20.

[0151] In some embodiments, the Shore hardness of the second adhesive layer 60 is 10-25.

[0152] The Shore hardness of the second adhesive layer 60 can be any one of 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 or any value between two of them.

[0153] In this embodiment, the Shore hardness of the second adhesive layer 60 is greater than or equal to 10, which can improve the cohesive strength and shear strength of the second adhesive layer 60; the Shore hardness of the second adhesive layer 60 is less than or equal to 25, which can improve the flexibility of the second adhesive layer 60 and reduce the risk of damage to the battery cell 10 caused by the second adhesive layer 60 squeezing the battery cell 10; therefore, a Shore hardness of 10-25 for the second adhesive layer 60 can balance improving the strength and flexibility of the second adhesive layer 60.

[0154] In some embodiments, the second adhesive layer 60 may include an acrylic pressure-sensitive adhesive and a substrate; wherein the substrate may include at least one of a petroleum resin and a crosslinking agent.

[0155] In this embodiment, the second adhesive layer 60 has high elasticity and buffering capacity. During the cycling process of the battery cell 10, such a second adhesive layer 60 can reduce the risk of damage to the battery cell 10 and the thermal management component 40, and extend the service life of the battery device 100.

[0156] In some embodiments, please continue to refer to Figure 6 , Figure 7 , Figure 10 and Figure 12 Along the second direction Z, the shielding part 402 is disposed at the end of the heat exchange part 401 facing the first wall 203.

[0157] like Figure 6 , Figure 7 , Figure 10 and Figure 12 As shown, the shielding part 402 is provided at the end of the heat exchange part 401 facing the first wall 203.

[0158] In this embodiment, by providing the shielding part 402 at the end of the heat exchange part 401 facing the first wall 203, the installation difficulty of the thermal management component 40 and the battery cell 10 is reduced.

[0159] In some embodiments, please continue to refer to Figure 14 The thermal management component 40 has a flow channel 405 for containing a heat exchange medium to manage the temperature of the battery cell 10; the flow channel 405 is located entirely within the heat exchange section 401.

[0160] The flow channel 405 can be a closed flow channel 405 within the thermal management component 40, containing a heat exchange medium; or the flow channel 405 can be connected to the outside, allowing the heat exchange medium to flow into or out of the flow channel 405, facilitating heat exchange between the heat exchange medium and the thermal management component 40. The heat exchange medium can be a phase change material, an aqueous solution of ethylene glycol, etc.

[0161] In this embodiment, the heat exchange medium is contained in the flow channel 405 of the heat exchange section 401 to facilitate heat exchange between the battery cell 10 and the heat exchange section 401, thereby reducing the risk of thermal runaway due to excessive temperature of the battery cell 10 and improving the reliability of the battery device 100.

[0162] In some embodiments, the thermal management component 40 has a flow channel 405 for containing a heat exchange medium to manage the temperature of the battery cell 10; a portion of the flow channel 405 is located in the heat exchange section 401 and another portion is located in the shielding section 402.

[0163] In this embodiment, both the heat exchange section 401 and the shielding section 402 have flow channels 405, thereby improving the thermal management component 40's ability to manage the temperature of the battery cell 10, further reducing the risk of thermal runaway due to excessive temperature of the battery cell 10, and improving the reliability of the battery device 100.

[0164] In some embodiments, please refer to Figure 6 The thermal management component 40 also includes an inlet pipe 403 and an outlet pipe 404. Both the inlet pipe 403 and the outlet pipe 404 are connected to the flow channel 405. The inlet pipe 403 is used to introduce the heat exchange medium into the flow channel 405, and the outlet pipe 404 is used to remove the heat exchange medium from the flow channel 405 from the thermal management component 400. Figure 6 As shown, the thermal management component 40 has two pipes on both sides along the third direction Y. One of the two pipes is the liquid inlet pipe 403, and the other is the liquid outlet pipe 404. The first direction X, the second direction Z, and the third direction Y are perpendicular to each other.

[0165] In some embodiments, please continue to refer to Figure 5 , Figure 7 , Figure 10 and Figure 12 The battery cell 10 includes a housing 1. Along the first direction X, the housing 1 has a first outer surface 13, which is the surface with the largest area among the outer surfaces of the housing 1.

[0166] The battery cell 10 can be a prismatic battery cell 10. The surface with the largest outer surface area in the battery cell 10 is the first outer surface 13. It can be understood that the outer casing 1 of the battery cell 10 has two first outer surfaces 13, and the two first outer surfaces 13 are arranged opposite each other along the first direction X.

[0167] In this embodiment, during the cycling process of the battery cell 10, the deformation of the first outer surface 13 is usually large. By providing a shielding part 402 connected to the heat exchange part 401 and located at least partially between the battery cell 10 and the first wall 203, the shielding part 402 can reduce the amount of the first adhesive layer 30 in contact with the first outer surface 13, thereby reducing the risk of damage to the battery cell 10 and extending the service life of the battery cell 10.

[0168] This application provides an electrical device, including a battery device 100 as provided in any of the above embodiments.

[0169] Please continue to refer to Figure 5 , Figure 6 , Figure 12 and Figure 13This application provides a battery device 100, including a housing 20, a first adhesive layer 30, a thermal management component 40, and a plurality of battery cells 10. The plurality of battery cells 10 are arranged along a first direction X. The housing 20 accommodates the plurality of battery cells 10 and includes a first wall 203, which supports the battery cells 10 along a second direction Z. At least a portion of the first adhesive layer 30 is located between the battery cells 10 and the first wall 203 and connects the battery cells 10 and the first wall 203. The thermal management component 40 includes a heat exchange portion 401 and a shielding portion 402. Along the first direction X, at least a portion of the heat exchange portion 401 is disposed between two adjacent battery cells 10. The shielding portion 402 is connected to the heat exchange portion 401 and protrudes from the heat exchange portion 401 onto the surface of the battery cells 10 along the first direction X. Along the second direction Z, at least a portion of the shielding portion 402 is located between the battery cells 10 and the first wall 203. Along the second direction Z, the battery cell 10 has a first surface 4 facing the first wall 203. The first surface 4 includes a connection area 41 covered by the shielded portion 402 and an exposed area 42 not covered by the shielded portion 402. Along the second direction Z, the shielded portion 402 has a second surface 4021 facing away from the battery cell 10. A first adhesive layer 30 covers at least a portion of the exposed area 42 and at least a portion of the second surface 4021. Along the first direction X, the shielded portion 402 includes a first side surface 4022 connected to the second surface 4021. The first adhesive layer 30 covers at least a portion of the first side surface 4022. Along the third direction Y, the shielded portion 402 further includes a second side surface 4023 connected to the second surface 4021. The first adhesive layer 30 covers at least a portion of the second side surface 4023. The first wall 203 has a third surface 2031 facing the battery cell 10. The third surface 2031 has a groove 20311, and the shielding portion 402 is at least partially embedded in the groove 20311. The thermal management component 40 has a flow channel 405 for containing a heat exchange medium to manage the temperature of the battery cell 10. A portion of the flow channel 405 is located in the heat exchange portion 401, and another portion is located in the shielding portion 402. The first direction X, the second direction Z, and the third direction Y are perpendicular to each other.

[0170] In this battery device 100, the battery cell 10 and the first wall 203 are connected by the first adhesive layer 30, which improves the connection strength between the battery cell 10 and the first wall 203, thereby improving the positional stability of the battery cell 10 within the housing 20. During the cycling process of the battery cell 10, the battery cell 10 is prone to expand or contract along the first direction X. By providing a shielding part 402 connected to the heat exchange part 401, and at least a portion of the shielding part 402 being located between the battery cell 10 and the first wall 203, on the one hand, the positional stability of the heat exchange part 401 can be improved, enhancing the heat exchange part 401's temperature management effect on the battery cell 10; on the other hand, the shielding part 402 can shield the first adhesive layer 30, reducing the risk of the first adhesive layer 30 entering between two adjacent battery cells 10 along the first direction X, thereby reducing the risk of damage caused by the battery cell 10 pressing against the first adhesive layer 30 along the first direction X, and extending the service life of the battery device 100. Both the exposed area 42 and the shielding portion 402 are connected to the first wall 203 via the first adhesive layer 30. This enhances the connection strength between the thermal management component 40 and the battery cell 10 and the first wall 203, reduces the risk of the thermal management component 40 and the battery cell 10 detaching from the first wall 203, and improves the structural stability of the battery device 100. By embedding at least a portion of the shielding portion 402 into the groove 20311, the thickness between the battery cell 10 and the third surface 2031 can be adjusted, allowing for a thinner first adhesive layer 30 between the third surface 2031 and the battery cell 10, which further enhances the connection strength between the battery cell 10 and the first wall 203. By positioning at least a portion of the second adhesive layer 60 between the battery cell 10 and the heat exchange portion 401 and connecting the battery cell 10 and the heat exchange portion 401, the connection strength between the battery cell 10 and the thermal management component 40 can be enhanced, reducing the risk of the thermal management component 40 detaching from the battery cell 10, thereby further improving the positional stability of the battery cell 10 within the housing 20. By embedding at least a portion of the shielding portion 402 into the groove 20311, the thickness between the battery cell 10 and the third surface 2031 can be adjusted, so that there can be a thinner first adhesive layer 30 between the third surface 2031 and the battery cell 10, which is beneficial to improving the connection strength between the battery cell 10 and the first wall 203.

[0171] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0172] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, include: Multiple battery cells are arranged along the first direction; A housing that accommodates multiple battery cells, the housing including a first wall that supports multiple battery cells along a second direction, the second direction intersecting the first direction; A first adhesive layer is located at least partially between the battery cell and the first wall, and connects the battery cell and the first wall; A thermal management component includes a heat exchange section and a shielding section. Along a first direction, at least a portion of the heat exchange section is disposed between two adjacent battery cells. The shielding section is connected to the heat exchange section and protrudes from the surface of the heat exchange section facing the battery cells along the first direction. Along a second direction, at least a portion of the shielding section is located between the battery cells and the first wall.

2. The battery device as claimed in claim 1, characterized in that, Along the first direction, a receiving space is formed between two adjacent battery cells, and at least a portion of the heat exchanger is received within the receiving space. Along the second direction, an opening is formed at one end of the receiving space facing the first wall, and the shielding portion covers at least a portion of the opening. The area of ​​the opening covered by the shielding part is S1, and the area of ​​the opening is S2, where 80% ≤ S1 / S2 ≤ 1.

3. The battery device as claimed in claim 2, characterized in that, The shielding portion completely covers the opening.

4. The battery device as claimed in claim 1, characterized in that, Along the second direction, the battery cell has a first surface facing the first wall, the first surface including a connection area covered by the shielding portion and an exposed area not covered by the shielding portion; Along the second direction, the shielding portion has a second surface facing away from the battery cell, and the first adhesive layer covers at least a portion of the exposed area and at least a portion of the second surface.

5. The battery device as claimed in claim 4, characterized in that, The first adhesive layer covers the entire exposed area; and / or the first adhesive layer covers the entire second surface.

6. The battery device as claimed in claim 4, characterized in that, Along the first direction, the shielding portion includes a first side surface, the first side surface being connected to the second surface, and the first adhesive layer covering at least a portion of the first side surface.

7. The battery device as claimed in claim 6, characterized in that, Along the third direction, the shielding portion further includes a second side surface, which is connected to the second surface. The first adhesive layer covers at least a portion of the second side surface, and the first direction, the second direction, and the third direction are perpendicular to each other.

8. The battery device as claimed in claim 4, characterized in that, The ratio of the surface area of ​​the exposed area to the surface area of ​​the first surface is 0.5-1.

9. The battery device as claimed in claim 1, characterized in that, The Shore hardness of the first adhesive layer is 40-60.

10. The battery device according to any one of claims 1-9, characterized in that, The first wall has a third surface facing the battery cell, the third surface being provided with a groove, and the shielding portion being at least partially embedded in the groove.

11. The battery device according to any one of claims 1-9, characterized in that, The battery device further includes a second adhesive layer, which is located at least partially between the battery cell and the heat exchange section along the first direction, and connects the battery cell and the heat exchange section.

12. The battery device as claimed in claim 11, characterized in that, The Shore hardness of the second adhesive layer is 10-25.

13. The battery device according to any one of claims 1-9, characterized in that, Along the second direction, the shielding portion is disposed at the end of the heat exchange portion facing the first wall.

14. The battery device as claimed in claim 13, characterized in that, The plurality of battery cells include a first battery cell and a second battery cell arranged adjacent to each other along the first direction. The heat exchange portion is at least partially located between the first battery cell and the second battery cell. Along the second direction, a portion of the shielding portion is located between the first battery cell and the first wall, and another portion of the shielding portion is located between the second battery cell and the first wall.

15. The battery device according to any one of claims 1-9, characterized in that, The thermal management component has a flow channel for containing a heat exchange medium to manage the temperature of the battery cell; The flow channel is entirely located within the heat exchange section; or a portion of the flow channel is located within the heat exchange section, and another portion is located within the shielding section.

16. The battery device according to any one of claims 1-9, characterized in that, The battery cell includes a casing, and along the first direction, the casing has a first outer surface, which is the surface with the largest area among the outer surfaces of the casing.

17. An electrical device, characterized in that, Includes the battery device as described in any one of claims 1-16.

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