Battery devices and electrical appliances

Abstract

This application discloses a battery device and an electrical device, belonging to the field of battery technology. The battery device includes a battery cell assembly, a first side plate, a first thermal management component, a second side plate, and a second thermal management component. The battery cell assembly includes at least one row of battery cells, and each row of battery cells includes multiple battery cells arranged along a first direction. The first side plate and the second side plate are respectively disposed on opposite sides of the battery cell assembly in a second direction. Along the second direction, the first thermal management component is located on the side of the first side plate opposite to the battery cell assembly, and the second thermal management component is located on the side of the second side plate opposite to the battery cell assembly. The first thermal management component forms a first flow channel, and the second thermal management component forms a second flow channel. Both the second and first flow channels are used to accommodate a heat exchange medium. The heat exchange medium and the battery cell assembly are thermally connected through the first and second side plates. The above-described battery device has high reliability.

Description

Technical Field

[0001] This application relates to the field of battery technology, 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] Improving the reliability of battery devices is a pressing issue in battery technology. Summary of the Invention

[0004] In view of the above problems, this application provides a battery device and an electrical device that can improve the reliability of the battery device.

[0005] In a first aspect, this application provides a battery device, comprising a battery cell assembly, a first side plate, a first thermal management component, a second side plate, and a second thermal management component. The battery cell assembly includes at least one row of battery cells, each row including a plurality of battery cells arranged along a first direction. The first side plate is disposed on one side of the battery cell assembly in a second direction, perpendicular to the first direction. Along the second direction, the first thermal management component is located on the side of the first side plate opposite to the battery cell assembly, and the first thermal management component forms a first flow channel for containing a heat exchange medium. The heat exchange medium and the battery cell assembly are thermally connected through the first side plate, and the heat exchange medium is used to regulate the temperature of the battery cells. The second side plate is disposed on the other side of the battery cell assembly in the second direction opposite to the first side plate. Along the second direction, the second thermal management component is located on the side of the second side plate opposite to the battery cell assembly, and the second thermal management component forms a second flow channel for containing a heat exchange medium. The heat exchange medium and the battery cell assembly are thermally connected through the second side plate, and the heat exchange medium is used to regulate the temperature of the battery cells.

[0006] In the technical solution of this application embodiment, since the heat exchange medium in the first flow channel is thermally connected to the battery cell assembly through the first side plate, the first side plate can play a role in temperature equalization when the two exchange heat. This reduces the temperature gradient between the multiple battery cells arranged along the first direction, thereby improving the temperature uniformity of the entire battery device. The second thermal management component can further improve the heat exchange efficiency of the battery cell assembly. At the same time, the second side plate can also effectively play a role in temperature equalization, resulting in a smaller temperature gradient between the multiple battery cells arranged along the first direction, thereby giving the entire battery device high temperature uniformity and high reliability.

[0007] In one or more embodiments of the first aspect, the first thermal management component includes a first heat exchange tube connected to the side of the first side plate away from the battery cell assembly, and the first heat exchange tube is used to transmit a heat exchange medium.

[0008] In the above scheme, since the first thermal management component includes a first heat exchange tube, on the one hand, the layout of its heat exchange area is more flexible. By designing the extension path of the first heat exchange tube in a targeted manner, the temperature gradient between multiple battery cells can be reduced, further improving the temperature consistency of the entire battery device. On the other hand, compared with a liquid cooling plate, the inner cavity of the first heat exchange tube directly forms a heat exchange channel, which helps to make the first thermal management component lighter, thereby enabling the battery device to have a higher mass energy density.

[0009] In one or more embodiments of the first aspect, the first heat exchange tube is bonded to the first side plate.

[0010] In the above solution, the first heat exchange tube and the first side plate are connected by adhesive bonding, which has high assembly efficiency and low maintenance cost.

[0011] In one or more embodiments of the first aspect, at least a portion of the wall of the first heat exchange tube is made of aluminum-plastic film.

[0012] In the above scheme, since at least part of the tube wall of the first heat exchange tube is made of aluminum-plastic film, the first heat exchange tube can have a lighter weight, which is beneficial to enable the battery device to have a higher mass energy density.

[0013] In one or more embodiments of the first aspect, the first heat exchange tube includes a first tube wall, a second tube wall, a third tube wall and a fourth tube wall connected end to end. The first tube wall and the third tube wall are spaced apart along a second direction, and the second tube wall and the fourth tube wall are spaced apart along a third direction. The first direction, the second direction and the third direction are perpendicular to each other. The third tube wall is connected to the first side plate. The material of the third tube wall is aluminum alloy, and the material of the first tube wall, the second tube wall and the fourth tube wall is aluminum-plastic film.

[0014] In the above scheme, the third tube wall connected to the first side plate in the first heat exchange tube is made of aluminum alloy, which significantly improves the overall structural stability of the first heat exchange tube, reduces the assembly difficulty, and helps to ensure high connection stability between the first side plate and the first heat exchange tube. At the same time, the first, second, and fourth tube walls are made of aluminum-plastic film, which effectively reduces the overall weight of the battery device while maintaining high structural stability.

[0015] In one or more embodiments of the first aspect, the first heat exchange tube includes a first tube segment, a second tube segment, and a third tube segment. The first tube segment and the third tube segment are spaced apart along a third direction. Both the first tube segment and the third tube segment extend along a first direction. The second tube segment connects one end of the first tube segment and one end of the third tube segment. The first direction, the second direction, and the third direction are perpendicular to each other.

[0016] In the above scheme, since the first pipe segment and the third pipe segment are spaced apart along the third direction, and the second pipe segment connects one end of the first pipe segment and one end of the third pipe segment, the first heat exchange tube can occupy less space while having a larger heat exchange area. This is beneficial for the first thermal management component to have high heat exchange efficiency, while also enabling the battery device to have high energy density.

[0017] In one or more embodiments of the first aspect, the battery device further includes a first protective plate along a second direction, the first protective plate being located on the side of the first side plate away from the battery cell assembly, the first protective plate being connected to the first side plate and forming a first receiving cavity with the first side plate, at least a portion of the first thermal management component being received within the first receiving cavity.

[0018] In the above scheme, the first protective plate and the first side plate can jointly limit the first thermal management component, so that the first thermal management component has high structural stability. At the same time, at least part of the first thermal management component is housed in the first accommodating cavity surrounded by the first protective plate and the first side plate, which can reduce the risk of damage to it and improve the reliability of the first heat pipe component.

[0019] In one or more embodiments of the first aspect, the battery device further includes a second protective plate along a second direction, the second protective plate being located on the side of the second side plate away from the battery cell assembly, the second protective plate being connected to the second side plate and forming a second accommodating cavity with the second side plate, at least a portion of the second thermal management component being accommodated within the second accommodating cavity.

[0020] In the above scheme, the second protective plate and the second side plate can jointly limit the second thermal management component, so that the second thermal management component has high structural stability. At the same time, at least part of the second thermal management component is housed in the second accommodating cavity surrounded by the second protective plate and the second side plate, which can reduce the risk of damage to it and improve the reliability of the second thermal management component.

[0021] In one or more embodiments of the first aspect, the battery device further includes a connecting pipe; the first flow channel and the second flow channel are connected through the connecting pipe.

[0022] In the above scheme, the connecting pipe connects the first flow channel and the second flow channel, which can form a continuous loop between the first flow channel and the second flow channel. This can save the space occupied by additional joints, pipes, etc., which is conducive to improving the energy density of the battery device and reducing the difficulty of installation and maintenance.

[0023] In one or more embodiments of the first aspect, the connecting tube is located on one side of the battery cell assembly along a first direction, and the connecting tube extends along a second direction.

[0024] In the above scheme, the connecting pipe is located on one side of the battery cell assembly along the first direction, which allows the connecting pipe to have a larger assembly space, which helps to reduce the assembly difficulty of the connecting pipe, reduce the risk of interference between the connecting pipe and the first side plate and / or the second side plate, shorten the flow path of the heat exchange medium, and improve the heat exchange efficiency.

[0025] In one or more embodiments of the first aspect, the battery device further includes a first adapter and a second adapter, wherein the first flow channel is connected to the connecting pipe via the first adapter, and the second flow channel is connected to the connecting pipe via the second adapter.

[0026] In the above scheme, the connection between the connecting pipe and the first flow channel and the second flow channel is realized through the first adapter and the second adapter. The first thermal management component, the second thermal management component and the connecting pipe can be maintained separately, which not only makes the battery device more convenient to assemble, but also improves the maintenance convenience of the battery device.

[0027] In one or more embodiments of the first aspect, the first flow channel has a first inlet end into which the heat exchange medium flows in and a first outlet end out of the heat exchange medium, and the second flow channel has a second inlet end into which the heat exchange medium flows in and a second outlet end out of the heat exchange medium. The first outlet end and the second inlet end are connected by a connecting pipe, and the first inlet end and the second outlet end are used to connect to an external heat exchange medium source.

[0028] In the above scheme, the first inlet and the second outlet, connected to the external heat exchange medium source, are located in the first and second thermal management components, respectively. This arrangement allows the heat exchange medium to flow sequentially through the first and second thermal management components, reducing the risk of localized overheating of the battery cell assembly and increasing reliability. Furthermore, this arrangement, by connecting the first and second flow channels in series, effectively reduces the cross-sectional area of ​​the channels compared to a parallel connection, thereby increasing the flow velocity of the heat exchange medium within both channels. This, in turn, improves the heat exchange efficiency of the battery cells and the reliability of the battery assembly.

[0029] In one or more embodiments of the first aspect, the first inlet end, the second outlet end, and the connecting pipe are located on the same side of the battery cell assembly along the first direction.

[0030] In the above scheme, the first inlet end, the second outlet end, and the connecting pipe can share some space, which is beneficial to improving the energy density of the battery device. In addition, the pipes connected to the first inlet end, the pipes connected to the second outlet end, and the connecting pipe can be assembled on the same side, which is beneficial to making the battery device have higher assembly convenience and higher assembly efficiency.

[0031] In one or more embodiments of the first aspect, the first inlet end, the first outlet end, the second inlet end, the second outlet end, and the connecting pipe are all located on the same side of the battery cell assembly along the first direction.

[0032] In the above scheme, the first inlet end, the first outlet end, the second inlet end, the second outlet end and the connecting pipe can share some space, which can further improve the energy density of the battery device and further improve the assembly convenience and assembly efficiency of the battery device.

[0033] In one or more embodiments of the first aspect, the battery device further includes a first end plate and a second end plate, the first end plate and the second end plate being located at both ends of the battery cell assembly along a first direction; a first side plate is connected to the first end plate and the second end plate, and a second side plate is connected to the first end plate and the second end plate.

[0034] In the above scheme, since the first side plate connects the first end plate and the second end plate, and the second side plate connects the first end plate and the second end plate, the first side plate and the second side plate can be used to restrain the battery cell assembly and provide preload force for the battery cell assembly. That is, the arrangement of the first side plate and the second side plate not only improves the temperature uniformity of the battery device but also improves the structural stability of the battery device.

[0035] In one or more embodiments of the first aspect, the battery device further includes a housing for accommodating a battery cell assembly. The housing includes a base plate located on one side of the battery cell assembly along a third direction. The base plate is used to support the battery cell assembly. The third direction, the second direction, and the first direction are perpendicular to each other.

[0036] In the above solution, the bottom plate of the box supports the individual battery modules, eliminating the need for additional support components. This helps save internal space, reduce the volume of the box, and increase the energy density of the battery device.

[0037] Secondly, this application provides an electrical device, including a battery device of one or more of the above embodiments, the battery device being used to provide electrical energy.

[0038] In the above solutions, since the battery device in one or more of the above embodiments has high reliability, the power supply device including the battery device in one or more of the above embodiments also has high reliability.

[0039] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0040] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0041] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0042] Figure 2 Exploded views of battery devices according to some embodiments of this application;

[0043] Figure 3 Here are exploded views of individual battery cells from some embodiments of this application;

[0044] Figure 4 This is an isometric view of a portion of the structure of a battery device according to some embodiments of this application;

[0045] Figure 5 This is an exploded view of a portion of the structure of a battery device according to some embodiments of this application;

[0046] Figure 6 This is an exploded view of a portion of the structure of a battery device according to some embodiments of this application;

[0047] Figure 7 This is a schematic diagram of a portion of the structure of a battery device according to some embodiments of this application;

[0048] Figure 8 This is an exploded view of a portion of the structure of a battery device according to some embodiments of this application;

[0049] Figure 9 This is a schematic diagram of a portion of the structure of a battery device according to some embodiments of this application;

[0050] Figure 10 This is a cross-sectional view of a portion of the structure of a battery device according to some embodiments;

[0051] Figure 11 for Figure 10 A magnified view of a portion of point A in the middle.

[0052] The reference numerals in the detailed embodiments are as follows:

[0053] 1000 - Vehicle; 200 - Controller; 300 - Motor; 100 - Battery Unit; 11 - Housing; 111 - First Housing; 112 - Second Housing; 12 - Battery Cell; 121 - Shell; 1211 - End Cap; 1212 - Housing; 122 - Electrode Assembly; 123 - Electrode Terminal; 124 - Adapter Plate; 131 - First Side Plate; 132 - Second Side Plate; 141 - First Thermal Management Component; 1411 - First Heat Exchanger Tube; 1411a - First Tube Wall; 1411b - Second Tube Wall; 1411c - Third Tube Wall; 1411 d - Fourth pipe wall; 1411e - First pipe section; 1411f - Second pipe section; 1411g - Third pipe section; 142 - Second thermal management component; 151 - First protective plate; 1511 - First accommodating cavity; 152 - Second protective plate; 16 - Connecting pipe; 171 - First adapter; 172 - Second adapter; 181 - First end plate; 182 - Second end plate; 191 - First inlet / outlet pipe; 192 - Second inlet / outlet pipe; 201 - First insulating component; 202 - Second insulating component; X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0054] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0056] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0057] In this document, the term "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 throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0058] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0059] 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.

[0060] 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.

[0061] 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.

[0062] In some embodiments, the positive electrode can be a positive electrode sheet, which may include a positive current collector and a positive active material disposed on at least one surface of the positive current collector.

[0063] 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.

[0064] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as a metal 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, nickel, 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.).

[0065] 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 may 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 manganese iron phosphate, and lithium manganese iron phosphate and carbon composites. Examples of lithium transition metal oxide may 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 LiNi1 / 3Co1 / 3Mn1 / 3O2 (also referred to 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.

[0066] In some embodiments, the positive electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed 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 can also be filled and / or deposited within the foamed metal, where the lithium source material is lithium metal and / or a lithium-rich material.

[0067] In some embodiments, the negative electrode can be a negative electrode sheet, and the negative electrode sheet can include a negative current collector.

[0068] As an example, the negative electrode current collector can be a metal foil, a foamed metal, or a composite current collector. For example, as a metal 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, nickel, or titanium, etc. Foamed metal can be nickel foam, copper foam, aluminum foam, foam alloy, 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 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.).

[0069] As an example, the negative electrode sheet may include a negative current collector and a negative active material disposed on at least one surface of the negative current collector.

[0070] 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.

[0071] 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.

[0072] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] Among them, the gel electrolyte includes a polymer as the electrolyte backbone network, combined with an ionic liquid - lithium salt.

[0080] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0081] 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.

[0082] 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.

[0083] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0084] In some embodiments, the electrode assembly is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0085] In some implementations, the electrode assembly is a stacked structure.

[0086] As an example, multiple positive and negative electrode plates can be set, and multiple positive and multiple negative electrode plates can be stacked alternately.

[0087] As an example, multiple positive electrode sheets can be set, and negative electrode sheets are folded to form multiple stacked folded segments, with a positive electrode sheet sandwiched between adjacent folded segments.

[0088] As an example, both the positive and negative electrode sheets are folded to form multiple stacked folded segments.

[0089] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0090] As an example, the separator can be continuously arranged between any adjacent positive or negative electrode plates by folding or rolling.

[0091] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0092] 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.

[0093] 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 battery cells, such as hexagonal prismatic battery cells.

[0094] The battery 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.

[0095] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0096] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0097] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0098] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0099] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0100] 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.

[0101] In some embodiments, the energy storage device includes a battery. The energy storage device may also include an energy storage container, an energy storage cabinet, etc.

[0102] The following discussion will primarily focus on rectangular battery cells. It should be understood that the embodiments described below are also applicable in some respects to cylindrical battery cells, pouch cell cells, or blade cell cells.

[0103] In a typical battery cell structure, a battery cell includes a casing, electrode components, and electrolyte. The casing includes an end cap and a housing; the end cap closes the opening of the housing to define a space for accommodating the electrode components. In some embodiments, the casing can 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.

[0104] The development of battery technology must take into account multiple design factors, such as energy density, cycle life, discharge capacity, charge / discharge rate and other performance parameters. In addition, the reliability of the battery device also needs to be considered.

[0105] Typically, battery devices place the thermal management component on one side of the battery cell assembly. This allows multiple battery cells in the assembly to exchange heat synchronously through a single thermal management component. However, this arrangement may result in an excessively large temperature gradient between the battery cells and the thickness of the thermal management component, leading to decreased temperature uniformity and reduced reliability of the battery device.

[0106] In view of this, this application provides a battery device, which includes a battery cell assembly, a first side plate, a first thermal management component, a second side plate, and a second thermal management component. The battery cell assembly includes at least one row of battery cells, and each row of battery cells includes a plurality of battery cells arranged along a first direction. The first side plate is disposed on one side of the battery cell assembly in a second direction, which is perpendicular to the first direction. Along the second direction, the first thermal management component is located on the side of the first side plate opposite to the battery cell assembly. The first thermal management component forms a first flow channel for containing a heat exchange medium. The heat exchange medium and the battery cell assembly are thermally connected through the first side plate, and the heat exchange medium is used to regulate the temperature of the battery cells. The second side plate is disposed on the other side of the battery cell assembly in the second direction opposite to the first side plate. Along the second direction, the second thermal management component is located on the side of the second side plate opposite to the battery cell assembly. The second thermal management component forms a second flow channel for containing a heat exchange medium. The heat exchange medium and the battery cell assembly are thermally connected through the second side plate, and the heat exchange medium is used to regulate the temperature of the battery cells. Because the heat exchange medium in the first flow channel is thermally connected to the battery cell assembly through the first side plate, the first side plate can play a role in temperature equalization when heat exchange occurs between the two. This reduces the temperature gradient between the multiple battery cells arranged along the first direction, thereby improving the temperature uniformity of the entire battery device. The second thermal management component can further improve the heat exchange efficiency of the battery cell assembly. At the same time, the second side plate can also effectively play a role in temperature equalization, resulting in a smaller temperature gradient between the multiple battery cells arranged along the first direction, thus giving the entire battery device high temperature uniformity and high reliability.

[0107] The technical solutions described in the embodiments of this application are applicable to battery cells, battery devices, and electrical devices using battery devices.

[0108] Electrical devices include, but are not limited to: electric vehicles, electric cars, ships, and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0109] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0110] For example, Figure 1This is a schematic diagram of the structure of a vehicle 1000 according to some embodiments of this application. The vehicle 1000 can be a gasoline vehicle, a natural gas vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle 1000 may have a motor 300, a controller 200, and a battery device 100 installed inside. 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 for the power requirements of starting, navigation, and operation of the vehicle 1000. In another embodiment 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, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle 1000.

[0111] To meet different power demands, the battery device 100 may include multiple battery cells 12, which can be connected in series, parallel, or in a mixed configuration. Optionally, the multiple battery cells 12 can first be connected in series, parallel, or in a mixed configuration to form a battery cell assembly, and then the battery cell assemblies can be connected in series, parallel, or in a mixed configuration to form the battery device 100. In other words, the multiple battery cells 12 can directly form the battery device 100, or they can first be assembled into battery cell assemblies, and then the battery cell assemblies can be assembled into the battery device 100.

[0112] For example, please refer to Figure 2 , Figure 2 The exploded view of a battery device 100 according to some embodiments of this application shows that the battery device 100 may include a plurality of battery cells 12. The battery device 100 may also include a housing 11, which has a hollow interior structure, housing the plurality of battery cells 12. As shown in the figure, these are referred to here as a first housing 111 and a second housing 112, which are fastened together. The shapes of the first housing 111 and the second housing 112 can be determined according to the combined shape of the plurality of battery cells 12. Both the first housing 111 and the second housing 112 may have an open surface. For example, both the first housing 111 and the second housing 112 may be hollow cuboids with only one open surface each. The open surfaces of the first housing 111 and the second housing 112 are opposite to each other, and the first housing 111 and the second housing 112 are fastened together to form a housing 11 with a closed cavity. Multiple battery cells 12 are connected in parallel, series, or mixed and placed inside the housing 11 formed by the first housing 111 and the second housing 112 being fastened together.

[0113] Optionally, the battery device 100 may also include other structures, which will not be described in detail here. For example, the battery device 100 may also include a busbar component for realizing electrical connection between multiple battery cells 12, such as in parallel, series, or mixed connection. Specifically, the busbar component can realize electrical connection between battery cells 12 by connecting the electrode terminals 123 of the battery cells 12. Further, the busbar component can be fixed to the electrode terminals 123 of the battery cells 12 by welding. The electrical energy of the multiple battery cells 12 can be further led out through the housing 11 via a conductive mechanism.

[0114] The number of battery cells 12 can be set to any value depending on different power requirements. Multiple battery cells 12 can be connected in series, parallel, or mixed connection to achieve a larger capacity or power. Since each battery device 100 may include a large number of battery cells 12, for ease of installation, the battery cells 12 can be grouped, with each group of battery cells 12 forming a battery cell assembly. The number of battery cells 12 included in a battery cell assembly is unlimited and can be set according to requirements. The battery device 100 may include multiple battery cell assemblies, which can be connected in series, parallel, or mixed connection.

[0115] Please refer to Figure 3 As shown, Figure 3 The image shows an exploded view of a battery cell 12 according to some embodiments of this application. The battery cell 12 includes one or more electrode assemblies 122 and a housing 121. The housing 121 may include a shell 1212, and multiple walls of the shell 1212 form a cavity for accommodating the electrode assemblies 122. The shape of the shell 1212 depends on the combined shape of the one or more electrode assemblies 122. For example, the shell 1212 may be a hollow cuboid, cube, or regular polyhedron, and one face of the shell 1212 may have an opening so that one or more electrode assemblies 122 can be placed inside the shell 1212. The shell 1212 is filled with an electrolyte, such as an electrolyte solution.

[0116] The battery cell 12 may also include two electrode terminals 123, which can be disposed on an end cap 1211. The end cap 1211 is typically flat, and the two electrode terminals 123 are fixed to the flat surface of the end cap 1211. The two electrode terminals 123 are respectively a positive electrode terminal 123 and a negative electrode terminal 123. Each electrode terminal 123 is provided with a corresponding adapter piece 124, which is located between the end cap 1211 and the electrode assembly 122, for electrically connecting the electrode assembly 122 and the electrode terminal 123. In this battery cell 12, depending on actual usage requirements, the electrode assembly 122 can be configured as a single unit or multiple units, and multiple independent electrode assemblies 122 are disposed within the battery cell 12.

[0117] According to some embodiments of this application, refer to Figures 4-11 This application provides a battery device 100, which includes a battery cell assembly, a first side plate 131, a first thermal management component 141, a second side plate 132, and a second thermal management component 142. The battery cell assembly includes at least one row of battery cells 12, and each row of battery cells 12 includes a plurality of battery cells 12 arranged along a first direction X. The first side plate 131 is disposed on one side of the battery cell assembly in a second direction Y, which is perpendicular to the first direction X. Along the second direction Y, the first thermal management component 141 is located on the side of the first side plate 131 opposite to the battery cell assembly. The first thermal management component 141 forms a first flow channel for containing a heat exchange medium. The heat exchange medium and the battery cell assembly are thermally connected through the first side plate 131, and the heat exchange medium is used to regulate the temperature of the battery cells 12. The second side plate 132 is disposed on the other side of the battery cell assembly in the second direction Y, opposite to the first side plate 131. Along the second direction Y, the second thermal management component 142 is located on the side of the second side plate 132 away from the battery cell assembly. The second thermal management component 142 forms a second flow channel for containing a heat exchange medium. The heat exchange medium and the battery cell assembly are thermally connected through the second side plate 132. The heat exchange medium is used to regulate the temperature of the battery cell 12.

[0118] In some embodiments, the surface of the battery cell 12 perpendicular to the first direction X is the surface with the largest area of ​​the battery cell 12.

[0119] In some embodiments, the battery cell assembly includes multiple rows of battery cells 12 arranged along a second direction Y.

[0120] In some embodiments, the material of the first side plate 131 may include metal, such as aluminum alloy, copper, steel, etc.

[0121] The first direction X can be any direction, and the second direction Y can be any direction that intersects the first direction X. Optionally, the second direction Y is perpendicular to the first direction X.

[0122] In some embodiments, the first direction X can be the length direction of the battery device 100, the second direction Y can be the width direction of the battery device 100, and the first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The third direction Z is parallel to the direction of gravity.

[0123] In some embodiments, the battery cell 12 includes a housing 121. A first insulating member 201 is disposed between a first side plate 131 and the housing 121 along the second direction Y. The first insulating member 201 can reduce the risk of short circuit in the battery cell 12. Exemplarily, the battery cell 12 includes a housing 121, which includes a shell 1212. The shell 1212 includes a first wall, a second wall, and a peripheral wall. The first wall and the second wall are disposed opposite each other along the third direction Z. The peripheral wall surrounds and connects the first wall and the second wall. The first insulating member 201 can be an insulating film covering at least a portion of the peripheral wall. In other embodiments, along the second direction Y, the first insulating member 201 is disposed between the insulating film and the first side plate 131. Exemplarily, the first insulating member 201 can balance high thermal conductivity and insulation; for example, the first insulating member 201 can be made of a composite material, such as thermally conductive silicone grease. In other embodiments, along the second direction Y, the first insulating member 201 can be spaced apart from the housing 121.

[0124] In some embodiments, the orthographic projection of the first side plate 131 along the second direction Y covers a plurality of battery cells 12.

[0125] The heat exchange medium mentioned below may include, but is not limited to, water, ethylene glycol-based coolant, propylene glycol-based coolant, fluorinated liquid, etc.

[0126] In some embodiments, the heat exchange medium may be in a gas-liquid two-phase state in the thermal management component.

[0127] In some embodiments, the first thermal management component 141 may include a first plate and a second plate stacked along a second direction Y, with a first flow channel for accommodating heat exchange medium provided between the first plate and the second plate. For example, a groove is provided on the side of the first plate facing the second plate, and the second plate and the groove together form the first flow channel.

[0128] In some embodiments, the first thermal management component 141 may be a profile plate, and the cavity of the first thermal management component 141 forms a flow channel for accommodating the heat exchange medium.

[0129] In some embodiments, the first thermal management component 141 may be a plurality of pipes, the inner cavity of which forms a first flow channel for containing the heat exchange medium.

[0130] In some embodiments, the first thermal management component 141 may form a first flow channel for accommodating the heat exchange medium together with the first side plate 131.

[0131] The first flow channel is used to contain the heat exchange medium. The heat exchange medium and the battery cell assembly are thermally connected through the first side plate 131. The heat exchange medium is used to regulate the temperature of the battery cell 12. This means that the first side plate 131 is located on the heat exchange path between the heat exchange medium and the first side plate 131. The first side plate 131 is conducive to homogenizing the heat exchange between the first thermal management component 141 and the battery cell assembly. That is, during the overall heat exchange process of the battery cell assembly, the risk of a certain battery cell 12 being too high or too low in temperature is low.

[0132] In some embodiments, the material of the second side plate 132 may include metal, such as aluminum alloy, copper, steel, etc.

[0133] In some embodiments, the battery cell 12 includes a housing 121. A second insulating member 202 is disposed between the second side plate 132 and the housing 121 along the second direction Y. The second insulating member 202 can reduce the risk of short circuit in the battery cell 12. Exemplarily, the battery cell 12 includes a housing 121, which includes a shell 1212. The shell 1212 includes a first wall, a second wall, and a peripheral wall. The first wall and the second wall are disposed opposite each other along the third direction Z. The peripheral wall surrounds and connects the first wall and the second wall. The second insulating member 202 can be an insulating film covering at least a portion of the peripheral wall. In other embodiments, along the second direction Y, the second insulating member 202 is disposed between the insulating film and the second side plate 132. Exemplarily, the second insulating member 202 can balance high thermal conductivity and insulation; for example, the second insulating member 202 can be made of a composite material, such as thermally conductive silicone grease. In other embodiments, along the second direction Y, the second insulating member 202 can be spaced apart from the housing 121.

[0134] In some embodiments, the second thermal management component 142 may include a third plate and a fourth plate stacked along a second direction Y, with a flow channel for accommodating a heat exchange medium provided between the third plate and the fourth plate. For example, a groove is provided on the side of the third plate facing the fourth plate, and the fourth plate and the groove together form the flow channel.

[0135] In some embodiments, the second thermal management component 142 may be a profile plate, and the cavity of the second thermal management component 142 forms a flow channel for accommodating the heat exchange medium.

[0136] In some embodiments, the second thermal management component 142 may be a plurality of pipes, the inner cavity of which forms a flow channel for accommodating the heat exchange medium.

[0137] In some embodiments, the second thermal management component 142 may form a second flow channel for accommodating the heat exchange medium together with the second side plate 132.

[0138] The second thermal management component 142 has a second flow channel for containing a heat exchange medium. The heat exchange medium and the battery cell assembly are thermally connected through the second side plate 132. The heat exchange medium is used to regulate the temperature of the battery cell 12. This means that the second side plate 132 is located on the heat exchange path between the heat exchange medium and the second side plate 132. The second side plate 132 is conducive to homogenizing the heat exchange between the second thermal management component 142 and the battery cell assembly. In other words, during the overall heat exchange process of the battery cell assembly, the risk of a certain battery cell 12 being too hot or too cold is low.

[0139] Along the second direction Y, the first thermal management component 141 and the second thermal management component 142 are located on both sides of the battery cell assembly, which can further improve the heat exchange efficiency of the battery device 100.

[0140] The second thermal management component 142 includes a second heat exchange tube connected to the side of the second side plate 132 opposite to the battery cell assembly. The material of the second heat exchange tube may include, but is not limited to, metal, plastic, and composite materials. The second heat exchange tube may include one or more tube walls; for example, at least one tube wall of the second heat exchange tube may be an arc-shaped wall. For example, the cross-sectional shape of the second heat exchange tube may be circular or elliptical, etc. In some embodiments, the second heat exchange tube may only abut against the second side plate 132, with the position of the second heat exchange tube defined by the remaining components of the battery device 100. In some embodiments, the second heat exchange tube may be snapped onto the side of the second side plate 132 opposite to the battery cell assembly, and the outer surface of the second heat exchange tube is connected to the second side plate 132. In some embodiments, the second heat exchange tube is thermoformed onto the surface of the second side plate 132 opposite to the battery cell assembly. The formation of the second heat exchange tube may include, but is not limited to, U-shape, L-shape, Z-shape, etc. In some embodiments, the second heat exchange tube may extend in a meandering manner. Because the second thermal management component 142 includes a second heat exchange tube, on the one hand, the layout of its heat exchange area is more flexible. By designing the extension path of the second heat exchange tube in a targeted manner, the temperature gradient between multiple battery cells 12 can be significantly reduced, further improving the temperature uniformity of the entire battery device 100. On the other hand, compared to a liquid cooling plate, the inner cavity of the second heat exchange tube directly forms a heat exchange channel, which helps to make the second thermal management component 142 lighter, thereby enabling the battery device 100 to have a higher mass energy density.

[0141] In some embodiments, the second heat exchange tube is flat, and its dimension in the second direction Y is smaller than its dimension in the third direction Z. This arrangement helps to reduce the space occupied by the second heat exchange tube in the second direction Y.

[0142] In some embodiments, the second heat exchange tube is bonded to the second side plate 132. In some embodiments, the second heat exchange tube can be bonded to the surface of the second side plate 132 opposite to the battery cell assembly by thermoforming.

[0143] In some embodiments, at least a portion of the wall of the second heat exchange tube is made of aluminum-plastic film. In other embodiments, all the walls of the second heat exchange tube are made of aluminum-plastic film. In still other embodiments, the second heat exchange tube includes a fifth, sixth, seventh, and eighth tube wall connected end-to-end. The fifth and seventh tube walls are spaced apart along a second direction Y, and the sixth and eighth tube walls are spaced apart along a third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The seventh tube wall is connected to the second side plate 132, and the seventh tube wall is made of aluminum alloy. The fifth, sixth, and eighth tube walls are made of aluminum-plastic film.

[0144] In some embodiments, the second heat exchange tube includes a fourth tube segment, a fifth tube segment, and a sixth tube segment. The fourth tube segment and the sixth tube segment are spaced apart along a third direction Z. Both the fourth tube segment and the sixth tube segment extend along a first direction X. The fifth tube segment connects one end of the fourth tube segment and one end of the sixth tube segment. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0145] In some embodiments, the first thermal management component 141 and the second thermal management component 142 may be connected in parallel or in series.

[0146] In the technical solution of this application embodiment, since the heat exchange medium in the first flow channel is thermally connected to the battery cell assembly through the first side plate 131, the first side plate 131 can play a role in temperature equalization when the two exchange heat. This reduces the temperature gradient between the multiple battery cells 12 arranged along the first direction X, thereby improving the temperature uniformity of the entire battery device 100. The second thermal management component 142 can further improve the heat exchange efficiency of the battery cell assembly. At the same time, the second side plate 132 can also effectively play a role in temperature equalization, resulting in a smaller temperature gradient between the multiple battery cells 12 arranged along the first direction X, thereby giving the entire battery device 100 higher temperature uniformity and further improving the reliability of the battery device 100. The aforementioned battery device 100 has high reliability.

[0147] According to some embodiments of this application, refer to Figures 4-6 The first thermal management component 141 includes a first heat exchange tube 1411, which is connected to the side of the first side plate 131 away from the battery cell assembly. The first heat exchange tube 1411 is used to carry the heat exchange medium.

[0148] The material of the first heat exchange tube 1411 may include, but is not limited to, metal, plastic and composite materials.

[0149] The first heat exchange tube 1411 may include one or more tube walls. For example, at least one tube wall of the heat exchange tube may be an arc-shaped wall. For example, the cross-sectional shape of the first heat exchange tube 1411 may be circular or elliptical, etc.

[0150] In some embodiments, the first heat exchange tube 1411 may only abut against the first side plate 131, with the position of the first heat exchange tube 1411 defined by the remaining components of the battery device 100.

[0151] In some embodiments, the first heat exchange tube 1411 may be snapped onto the side of the first side plate 131 opposite to the battery cell assembly, and the outer surface of the first heat exchange tube 1411 is connected to the first side plate 131.

[0152] In some embodiments, the first heat exchange tube 1411 is hot-pressed onto the surface of the first side plate 131 on the side opposite to the battery cell assembly.

[0153] The formation of the first heat exchange tube 1411 may include, but is not limited to, U-shape, L-shape, Z-shape, etc.

[0154] In some embodiments, the first heat exchange tube 1411 may extend in a meandering manner.

[0155] In some embodiments, the first heat exchange tube 1411 is flat, and its dimension in the second direction Y is smaller than its dimension in the third direction Z. This arrangement helps to reduce the space occupied by the first heat exchange tube 1411 in the second direction Y.

[0156] In the above scheme, since the first thermal management component 141 includes a first heat exchange tube 1411, on the one hand, the layout of its heat exchange area is more flexible. By designing the extension path of the first heat exchange tube 1411 in a targeted manner, the temperature gradient between multiple battery cells 12 can be reduced, further improving the temperature uniformity of the entire battery device 100. On the other hand, compared with a liquid cooling plate, the inner cavity of the first heat exchange tube 1411 directly forms a heat exchange flow channel, which helps to make the first thermal management component 141 lighter, thereby enabling the battery device 100 to have a higher mass energy density.

[0157] According to some embodiments of this application, refer to Figures 4-6 The first heat exchange tube 1411 is bonded to the first side plate 131.

[0158] In some embodiments, the first heat exchange tube 1411 and the first side plate 131 can be bonded together with thermally conductive adhesive.

[0159] In some embodiments, the first heat exchange tube 1411 and the first side plate 131 can be bonded together with structural adhesive.

[0160] In some embodiments, the first heat exchange tube 1411 can be bonded to the surface of the first side plate 131 on the side opposite to the battery cell assembly by thermoforming.

[0161] In the above scheme, the first heat exchange tube 1411 and the first side plate 131 are connected by adhesive bonding, which has high assembly efficiency and low maintenance cost.

[0162] According to some embodiments of this application, refer to Figures 4-6 At least a portion of the wall of the first heat exchange tube 1411 is made of aluminum-plastic film.

[0163] In some embodiments, the first heat exchange tube 1411 is made of aluminum-plastic film and its wall is connected to the first side plate 131 by hot pressing.

[0164] In some embodiments, the aluminum-plastic film can be rolled into a tube by a forming device and then sealed by a heat-sealing knife to form a continuous tube.

[0165] At least a portion of the wall of the first heat exchange tube 1411 is made of aluminum-plastic film, which means that the first heat exchange tube 1411 has a lighter weight and lower cost compared to metal tubes, such as aluminum alloy tubes.

[0166] In the above scheme, since at least part of the tube wall of the first heat exchange tube 1411 is made of aluminum-plastic film, the first heat exchange tube 1411 can have a lighter weight, which is beneficial to enable the battery device 100 to have a higher mass energy density.

[0167] In the above scheme, since all the tube walls of the first heat exchange tube 1411 are made of aluminum-plastic film, its weight is further reduced and the energy density of the battery device 100 is further improved.

[0168] According to some embodiments of this application, refer to Figures 4-6 The first heat exchange tube 1411 includes a first tube wall 1411a, a second tube wall 1411b, a third tube wall 1411c, and a fourth tube wall 1411d connected end to end. The first tube wall 1411a and the third tube wall 1411c are spaced apart along the second direction Y, and the second tube wall 1411b and the fourth tube wall 1411d are spaced apart along the third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The third tube wall 1411c is connected to the first side plate 131. The material of the third tube wall 1411c is aluminum alloy, and the materials of the first tube wall 1411a, the second tube wall 1411b, and the fourth tube wall 1411d are aluminum-plastic film.

[0169] The third pipe wall 1411c can be connected to the first side plate 131 by welding or fasteners.

[0170] In some embodiments, the first tube wall 1411a, the second tube wall 1411b, and the fourth tube wall 1411d can be connected to the third tube wall 1411c by hot pressing.

[0171] In some embodiments, the second pipe wall 1411b and the fourth pipe wall 1411d are both U-shaped. Along the second direction Y, the second pipe wall 1411b and the fourth pipe wall 1411d are spaced apart, and the fourth pipe wall 1411d surrounds the second pipe wall 1411b.

[0172] In the above scheme, the third tube wall 1411c of the first heat exchange tube 1411, which is connected to the first side plate 131, is made of aluminum alloy, which significantly improves the overall structural stability of the first heat exchange tube 1411, reduces the assembly difficulty, and helps to ensure high connection stability between the first side plate 131 and the first heat exchange tube 1411. At the same time, the first tube wall 1411a, the second tube wall 1411b, and the fourth tube wall 1411d are made of aluminum-plastic film, which effectively reduces the overall weight of the battery device 100 while maintaining high structural stability.

[0173] According to some embodiments of this application, refer to Figures 4-7 The first heat exchange tube 1411 includes a first tube segment 1411e, a second tube segment 1411f, and a third tube segment 1411g. The first tube segment 1411e and the third tube segment 1411g are spaced apart along the third direction Z. Both the first tube segment 1411e and the third tube segment 1411g extend along the first direction X. The second tube segment 1411f connects one end of the first tube segment 1411e and one end of the third tube segment 1411g. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0174] In some embodiments, the orthographic projections of the first pipe segment 1411e and the third pipe segment 1411g overlap at least partially in the same projection plane perpendicular to the third direction Z. With this arrangement, the first pipe segment 1411e and the third pipe segment 1411g can share a portion of the space in the third direction Z, which is beneficial to improving the energy density of the battery device 100.

[0175] In some embodiments, the first pipe section 1411e and the third pipe section 1411g are both straight pipes.

[0176] In some embodiments, the third pipe segment 1411g is an arc-shaped pipe.

[0177] In some embodiments, the inlet end of the first pipe section 1411e and the outlet end of the third pipe section 1411g are located on the same side in the first direction X.

[0178] In some embodiments, the first heat exchange tube 1411 is U-shaped.

[0179] In some embodiments, the first heat exchange tube 1411 is Z-shaped.

[0180] In the above scheme, since the first pipe segment 1411e and the third pipe segment 1411g are arranged at intervals along the third direction Z, and the second pipe segment 1411f connects one end of the first pipe segment 1411e and one end of the third pipe segment 1411g, the first heat exchange tube 1411 can occupy less space while having a larger heat exchange area. This is beneficial to enable the first thermal management component 141 to have a higher heat exchange efficiency and the battery device 100 to have a higher energy density.

[0181] According to some embodiments of this application, refer to Figures 4-8 The battery device 100 also includes a first protective plate 151. Along the second direction Y, the first protective plate 151 is located on the side of the first side plate 131 away from the battery cell assembly. The first protective plate 151 is connected to the first side plate 131 and forms a first receiving cavity 1511 with the first side plate 131. The first thermal management component 141 is at least partially housed in the first receiving cavity 1511.

[0182] The material of the first protective plate 151 may include, but is not limited to, plastics, metals, and composite materials. Among them, composite materials may be composed of two or more material components with different chemical and physical properties, combined in a designed form, proportion, and distribution, with a clear interface between the components.

[0183] In some embodiments, the first insulating member 201 may be a film-like insulating material, and the first insulating member 201 may wrap around at least a portion of the first side plate 131 and the first protective plate 151 to improve the connection stability of the first side plate 131 and the first protective plate 151. For example, the first insulating member 201 may be wrapped around the outside of the first side plate 131 and the first protective plate 151.

[0184] In some embodiments, the first thermal management component 141 includes a first heat exchange tube 1411, which includes a first tube segment 1411e, a second tube segment 1411f, and a third tube segment 1411g. The first tube segment 1411e and the third tube segment 1411g are spaced apart along a third direction Z. Both the first tube segment 1411e and the third tube segment 1411g extend along a first direction X. The second tube segment 1411f connects one end of the first tube segment 1411e and one end of the third tube segment 1411g. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The first protective plate 151 includes a first body. A first recess is provided on the surface of the first body facing the first side plate 131. At least a portion of the first heat exchange tube 1411 is received in the first recess. The first recess and the first side plate 131 enclose a first receiving cavity 1511. The surface of the first body facing the first side plate 131 is also provided with a first protrusion, and at least part of the first protrusion is located between the first tube segment 1411e and the third tube segment 1411g along the third direction Z. This arrangement allows the shape of the first protective plate 151 to better match the first heat exchange tube 1411, and the first heat exchange tube 1411 and the first protective plate 151 can serve as assembly references for each other, which is beneficial to improving the assembly efficiency of the battery device 100. In some embodiments, one end of the first tube segment 1411e and one end of the third tube segment 1411g extend out of the first receiving cavity 1511 along the first direction X. In some embodiments, the first heat exchange tube 1411 is U-shaped, and the first recess is U-shaped.

[0185] In the above scheme, the first protective plate 151 and the first side plate 131 can jointly limit the first heat exchange tube 1411, so that the first heat exchange tube 1411 has high structural stability. At the same time, at least part of the first heat exchange tube 1411 is housed in the first accommodating cavity 1511 surrounded by the first protective plate 151 and the first side plate 131, which can reduce the risk of damage to it and improve the reliability of the first heat pipe component.

[0186] According to some embodiments of this application, refer to Figures 4-11 The battery device 100 also includes a second protective plate 152. Along the second direction Y, the second protective plate 152 is located on the side of the second side plate 132 away from the battery cell assembly. The second protective plate 152 is connected to the second side plate 132 and forms a second accommodating cavity with the second side plate 132. At least a portion of the second thermal management component 142 is accommodated in the second accommodating cavity.

[0187] The material of the second protective plate 152 may include, but is not limited to, plastics, metals, and composite materials. Among them, composite materials may be composed of two or more material components with different chemical and physical properties, combined in a designed form, proportion, and distribution, with a clear interface between the components.

[0188] In the above scheme, the second protective plate 152 and the second side plate 132 can jointly limit the second thermal management component 142, so that the second thermal management component 142 has high structural stability. At the same time, at least part of the second thermal management component 142 is housed in the second accommodating cavity surrounded by the second protective plate 152 and the second side plate 132, which can reduce the risk of damage to it and improve the reliability of the second thermal management component 142.

[0189] According to some embodiments of this application, refer to Figures 4-11 The battery device 100 also includes a connecting pipe 16; the first flow channel and the second flow channel are connected through the connecting pipe 16.

[0190] The material of the connecting pipe 16 may include metal, plastic and composite materials.

[0191] The connecting pipe 16 can connect the first flow channel and the second flow channel at any position.

[0192] The connecting pipe 16 can be a straight pipe or an arc-shaped pipe.

[0193] In some embodiments, one of the first thermal management component 141 and the second thermal management component 142 has a total inlet and a total outlet, which are connected to an external heat exchange medium source so that the heat exchange medium can flow in the first thermal management component 141 and the second thermal management component 142.

[0194] In the above scheme, the connecting pipe 16 connects the first flow channel and the second flow channel, which can form a continuous loop between the first flow channel and the second flow channel. This can save the space occupied by additional joints, pipes, etc., which is conducive to improving the energy density of the battery device 100 and reducing the difficulty of installation and maintenance.

[0195] According to some embodiments of this application, refer to Figures 4-11 The connecting pipe 16 is located on one side of the battery cell assembly along the first direction X, and the connecting pipe 16 extends along the second direction Y.

[0196] In some embodiments, the orthographic projection of the connecting pipe 16 lies within the orthographic projection of the battery cell assembly in the same projection plane perpendicular to the first direction X. This arrangement ensures that the connecting pipe 16 does not extend beyond the battery cell assembly in the second direction Y, which is beneficial for improving the energy density of the battery cell assembly.

[0197] In the above scheme, the connecting pipe 16 is located on one side of the battery cell assembly along the first direction X, which allows the connecting pipe 16 to have a larger assembly space, which helps to reduce the assembly difficulty of the connecting pipe 16, reduce the risk of interference between the connecting pipe 16 and the first side plate 131 and / or the second side plate 132, shorten the flow path of the heat exchange medium, and improve the heat exchange efficiency.

[0198] According to some embodiments of this application, refer to Figures 4-11 The battery device 100 also includes a first adapter 171 and a second adapter 172. The first flow channel is connected to the connecting pipe 16 through the first adapter 171, and the second flow channel is connected to the connecting pipe 16 through the second adapter 172.

[0199] In some embodiments, the first adapter 171 and the second adapter 172 are disposed opposite each other along the second direction Y.

[0200] In some embodiments, the first adapter 171 includes a first receiving cavity communicating with the first opening, the second adapter 172 includes a second receiving cavity communicating with the second opening, the outlet end of the first flow channel communicates with the first receiving cavity, the outlet end of the second flow channel communicates with the second receiving cavity, and the connecting pipe 16 is connected to the first opening and the second opening. In some embodiments, along the second direction Y, the first opening and the second opening at least partially overlap.

[0201] In the above scheme, the connection between the connecting pipe 16 and the first flow channel and the second flow channel is realized through the first adapter 171 and the second adapter 172. The first thermal management component 141, the second thermal management component 142 and the connecting pipe 16 can be maintained separately. This not only makes the battery device 100 more convenient to assemble, but also improves the maintenance convenience of the battery device 100.

[0202] According to some embodiments of this application, refer to Figures 4-11 The first flow channel has a first inlet end into which the heat exchange medium flows in and a first outlet end out of the heat exchange medium. The second flow channel has a second inlet end into which the heat exchange medium flows in and a second outlet end out of the heat exchange medium. The first outlet end and the second inlet end are connected by a connecting pipe 16. The first inlet end and the second outlet end are used to connect to an external heat exchange medium source.

[0203] The first outlet end and the second inlet end are connected by a connecting pipe 16. The first inlet end and the second outlet end are used to connect to an external heat exchange medium source, which means that the heat exchange medium can flow through the first flow channel and the second flow channel in sequence.

[0204] In the above scheme, the first inlet and the second outlet, which are connected to the external heat exchange medium source, are located in the first thermal management component and the second thermal management component, respectively. This arrangement allows the heat exchange medium to flow sequentially through the first and second thermal management components, reducing the risk of localized overheating of the battery cell assembly and increasing reliability. Furthermore, this arrangement, by connecting the first and second flow channels in series, effectively reduces the cross-sectional area of ​​the flow channels and increases the flow velocity of the heat exchange medium within them, compared to a parallel connection, thereby improving the heat exchange efficiency of the battery cell 12 and the reliability of the battery device 100.

[0205] According to some embodiments of this application, refer to Figures 4-11The first inlet end, the second outlet end, and the connecting pipe 16 are located on the same side of the battery cell assembly along the first direction X.

[0206] In some embodiments, the battery device 100 further includes a first inlet / outlet pipe 191 and a second inlet / outlet pipe 192, wherein the first inlet / outlet pipe 191 is connected to a first inlet end and the second inlet / outlet pipe 192 is connected to a second outlet end. In other embodiments, the first inlet / outlet pipe 191, the second inlet / outlet pipe 192, the connecting pipe 16, the first adapter 171, and the second adapter 172 are located on the same side of the battery cell assembly along a first direction X.

[0207] The first inlet and the second outlet can be connected in parallel or in series in the cooling circuit of the battery device 100, or in parallel or in series in the cooling circuit of the electrical device.

[0208] In the above scheme, the first inlet end, the second outlet end, and the connecting pipe 16 can share some space, which is beneficial to improving the energy density of the battery device 100. In addition, the pipes connected to the first inlet end, the pipes connected to the second outlet end, and the connecting pipe 16 can be assembled on the same side, which is beneficial to give the battery device 100 higher assembly convenience and higher assembly efficiency.

[0209] According to some embodiments of this application, refer to Figures 4-11 The first inlet end, the first outlet end, the second inlet end, the second outlet end, and the connecting pipe 16 are all located on the same side of the battery cell assembly along the first direction X.

[0210] In the above scheme, the first inlet end, the first outlet end, the second inlet end, the second outlet end and the connecting pipe 16 can share some space, which can further improve the energy density of the battery device 100 and further improve the assembly convenience and assembly efficiency of the battery device 100.

[0211] According to some embodiments of this application, refer to Figures 4-11 The battery device 100 also includes a first end plate 181 and a second end plate 182, the first end plate 181 and the second end plate 182 being located at both ends of the battery cell assembly along the first direction X; a first side plate 131 connecting the first end plate 181 and the second end plate 182, and a second side plate 132 connecting the first end plate 181 and the second end plate 182.

[0212] In some embodiments, the battery device 100 further includes a housing 11, which includes a bottom plate; wherein the first side plate 131, the second side plate 132, the first end plate 181, the second end plate 182 and the bottom plate enclose a receiving space, and the battery cell 12 is received in the receiving space.

[0213] In some embodiments, both the first side plate 131 and the second side plate 132 are used to secure the battery cell assembly. It is understood that the dimension along the first direction X of the battery cell assembly before it is inserted between the first end plate 181 and the second end plate 182 is smaller than the dimension along the first direction X of the first end plate 181 and the second end plate 182 after it is inserted between them. This arrangement allows the assembly of the battery cell assembly to be completed by a preload and friction between adjacent battery cells 12.

[0214] In some embodiments, a buffer pad and / or a heat insulation pad may be provided between two adjacent battery cells 12 along the first direction X; in other embodiments, the battery cells 12 located at both ends of the plurality of battery cells 12 are first end battery cells 12 and second end battery cells 12, and the battery cell assembly further includes a buffer pad and / or a heat insulation pad, a buffer pad and / or a heat insulation pad is provided between the first end plate 181 and the first end battery cell 12, and a buffer pad and / or a heat insulation pad is provided between the second end plate 182 and the second end battery cell 12.

[0215] In some embodiments, in the same projection plane perpendicular to the second direction Y, the orthographic projection of the first heat exchange tube 1411 at least partially overlaps with the orthographic projection of the first end plate 181; and / or, in the same projection plane perpendicular to the second direction Y, the orthographic projection of the second heat exchange tube at least partially overlaps with the orthographic projection of the first end plate 181.

[0216] In the above scheme, since the first side plate 131 connects to the first end plate 181 and the second end plate 182, and the second side plate 132 connects to the first end plate 181 and the second end plate 182, the first side plate 131 and the second side plate 132 can be used to bind the battery cell assembly and provide pre-tightening force for the battery cell assembly. That is, the arrangement of the first side plate 131 and the second side plate 132 not only improves the temperature uniformity of the battery device 100 but also improves the structural stability of the battery device 100.

[0217] According to some embodiments of this application, refer to Figures 4-11 The battery device 100 also includes a housing 11 for accommodating battery cell assembly. The housing 11 includes a base plate located on one side of the battery cell assembly along the third direction Z. The base plate is used to support the battery cell assembly. The third direction Z, the second direction Y, and the first direction X are perpendicular to each other.

[0218] In some embodiments, both the first end plate 181 and the second end plate 182 are connected to the base plate.

[0219] In some embodiments, the battery cell 12 is connected to the base plate by structural adhesive.

[0220] In the above scheme, the bottom plate of the box 11 carries the battery cell assembly, eliminating the need for additional support components to carry the battery cell assembly. This helps save internal space in the box 11, reduce the volume of the box 11, and increase the energy density of the battery device 100.

[0221] According to some embodiments of this application, refer to Figure 1 This application provides an electrical device, including a battery device 100 of one or more of the above embodiments, the battery device 100 being used to provide electrical energy.

[0222] In the above solutions, since the battery device 100 in one or more of the above embodiments has high reliability, the power-consuming device including the battery device 100 in one or more of the above embodiments also has high reliability.

[0223] According to some embodiments of this application, please refer to Figures 4-11 This application provides a battery device 100, which includes a battery cell assembly, a first side plate 131, a second side plate 132, a first end plate 181, a second end plate 182, a first protective plate 151, a second protective plate 152, a connecting pipe 16, a first thermal management component 141, and a second thermal management component 142. The battery cell assembly includes a plurality of battery cells 12, which are arranged along a first direction X. The first end plate 181 and the second end plate 182 are located at opposite ends of the battery cell assembly along the first direction X, respectively. The first side plate 131 connects the first end plate 181 and the second end plate 182, and the second side plate 132 connects the first end plate 181 and the second end plate 182.

[0224] A first side plate 131 is disposed on one side of the battery cell assembly in the second direction Y, which intersects with the first direction X. Along the second direction Y, a first thermal management component 141 is located on the side of the first side plate 131 facing away from the battery cell assembly. The first thermal management component 141 has a first flow channel for containing a heat exchange medium. The heat exchange medium and the battery cell assembly are thermally connected through the first side plate 131, and the heat exchange medium is used to regulate the temperature of the battery cell 12. A second side plate 132 is disposed on the other side of the battery cell assembly in the second direction Y. Along the second direction Y, a second thermal management component 142 is located on the side of the second side plate 132 facing away from the battery cell assembly. The second thermal management component 142 has a second flow channel for containing a heat exchange medium. The heat exchange medium and the battery cell assembly are thermally connected through the second side plate 132, and the heat exchange medium is used to regulate the temperature of the battery cell 12.

[0225] The first thermal management component 141 includes a first heat exchange tube 1411, which is connected to the side of the first side plate 131 opposite to the battery cell assembly. At least a portion of the tube wall of the first heat exchange tube 1411 is made of aluminum-plastic film. The first heat exchange tube 1411 includes a first tube segment 1411e, a second tube segment 1411f, and a third tube segment 1411g. The first tube segment 1411e and the third tube segment 1411g are spaced apart along a third direction Z. Both the first tube segment 1411e and the third tube segment 1411g extend along a first direction X. The second tube segment 1411f connects one end of the first tube segment 1411e and one end of the third tube segment 1411g. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. Along the second direction Y, the first protective plate 151 is located on the side of the first side plate 131 away from the battery cell assembly. The first protective plate 151 is connected to the first side plate 131 and together with the first side plate 131 forms a first accommodating cavity 1511. The first heat exchange tube 1411 is at least partially housed in the first accommodating cavity 1511.

[0226] The second thermal management component 142 includes a second heat exchange tube connected to the side of the second side plate 132 opposite to the battery cell assembly. At least a portion of the tube wall of the second heat exchange tube is made of aluminum-plastic film. The second heat exchange tube includes a fourth tube segment, a fifth tube segment, and a sixth tube segment. The fourth and sixth tube segments are spaced apart along a third direction Z. Both the fourth and sixth tube segments extend along a first direction X. The fifth tube segment connects one end of the fourth tube segment and one end of the sixth tube segment. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The first thermal management component 141 and the second thermal management component 142 are connected in series. Along the second direction Y, a second protective plate 152 is located on the side of the second side plate 132 opposite to the battery cell assembly. The second protective plate 152 is connected to the second side plate 132 and forms a second receiving cavity with the second side plate 132. At least a portion of the second heat exchange tube is housed within the second receiving cavity.

[0227] The outlet end of the first flow channel and the inlet end of the second flow channel are connected by a connecting pipe 16. The connecting pipe 16 is located on one side of the battery cell assembly along the first direction X, and extends along the second direction Y. The inlet end of the first flow channel, the outlet end of the second flow channel, and the connecting pipe 16 are located on the same side of the battery cell assembly along the first direction X.

[0228] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, include: A battery cell assembly includes at least one row of battery cells, each row of battery cells including a plurality of battery cells arranged along a first direction; A first side plate is disposed on one side of the battery cell assembly in a second direction, the second direction being perpendicular to the first direction; A first thermal management component is located on the side of the first side plate away from the battery cell assembly along the second direction. The first thermal management component has a first flow channel for containing a heat exchange medium. The heat exchange medium and the battery cell assembly are thermally connected through the first side plate. The heat exchange medium is used to regulate the temperature of the battery cell. The second side plate is disposed on the side of the battery cell assembly opposite to the first side plate in the second direction; A second thermal management component is located on the side of the second side plate away from the battery cell assembly along the second direction. The second thermal management component has a second flow channel for accommodating a heat exchange medium. The heat exchange medium and the battery cell assembly are thermally connected through the second side plate. The heat exchange medium is used to regulate the temperature of the battery cell. The first thermal management component includes a first heat exchange tube, which is connected to the side of the first side plate away from the battery cell assembly, and is used to pass a heat exchange medium. The first heat exchange tube includes a first tube wall, a second tube wall, a third tube wall, and a fourth tube wall connected end to end in sequence. The first tube wall and the third tube wall are spaced apart along the second direction, and the second tube wall and the fourth tube wall are spaced apart along the third direction. The first direction, the second direction, and the third direction are perpendicular to each other. The third pipe wall is connected to the first side plate. The material of the third pipe wall is aluminum alloy, while the materials of the first pipe wall, the second pipe wall, and the fourth pipe wall are aluminum-plastic film.

2. The battery device according to claim 1, characterized by The first heat exchange tube is bonded to the first side plate.

3. The battery device of claim 1, wherein The first heat exchange tube includes a first tube segment, a second tube segment, and a third tube segment. The first tube segment and the third tube segment are spaced apart along a third direction. Both the first tube segment and the third tube segment extend along the first direction. The second tube segment connects one end of the first tube segment and one end of the third tube segment. The first direction, the second direction, and the third direction are perpendicular to each other.

4. The battery device according to any one of claims 1 to 3, characterized by, The battery device further includes a first protective plate along the second direction, the first protective plate being located on the side of the first side plate away from the battery cell assembly, the first protective plate being connected to the first side plate and forming a first receiving cavity with the first side plate, at least a portion of the first thermal management component being housed within the first receiving cavity.

5. The battery device according to any one of claims 1 to 3, wherein The battery device further includes a second protective plate along the second direction, the second protective plate being located on the side of the second side plate away from the battery cell assembly, the second protective plate being connected to the second side plate and forming a second accommodating cavity with the second side plate, at least a portion of the second thermal management component being housed within the second accommodating cavity.

6. The battery device according to any one of claims 1-3, characterized in that, The battery device also includes a connecting pipe; The first flow channel and the second flow channel are connected through the connecting pipe.

7. The battery device according to claim 6, characterized in that, The connecting pipe is located on one side of the battery cell assembly along the first direction, and the connecting pipe extends along the second direction.

8. The battery device according to claim 6, characterized in that, The battery device further includes a first adapter and a second adapter, wherein the first flow channel is connected to the connecting pipe through the first adapter, and the second flow channel is connected to the connecting pipe through the second adapter.

9. The battery device according to claim 6, characterized in that, The first flow channel has a first inlet end into which the heat exchange medium flows in and a first outlet end out of the heat exchange medium. The second flow channel has a second inlet end into which the heat exchange medium flows in and a second outlet end out of the heat exchange medium. The first outlet end and the second inlet end are connected through the connecting pipe. The first inlet end and the second outlet end are used to connect to an external heat exchange medium source.

10. The battery device according to claim 9, characterized in that, The first inlet end, the second outlet end, and the connecting pipe are located on the same side of the battery cell assembly along the first direction.

11. The battery device according to claim 10, characterized in that, The first inlet, the first outlet, the second inlet, the second outlet, and the connecting pipe are all located on the same side of the battery cell assembly along the first direction.

12. The battery device according to any one of claims 1-3, characterized in that, The battery device further includes a first end plate and a second end plate, the first end plate and the second end plate being located at both ends of the battery cell assembly along the first direction, respectively; The first side plate connects the first end plate and the second end plate, and the second side plate connects the first end plate and the second end plate.

13. The battery device according to any one of claims 1-3, characterized in that, The battery device also includes: A housing for accommodating the battery cell assembly, the housing including a base plate located on one side of the battery cell assembly along a third direction, the base plate for supporting the battery cell assembly, the third direction, the second direction and the first direction being perpendicular to each other.

14. An electrical appliance, characterized in that, Includes a battery device as described in any one of claims 1-13, the battery device being used to provide electrical energy.

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