Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device. The battery device comprises a box body, a battery monomer, a flow guide assembly and a plurality of heat management parts, the battery monomers are arranged in the box body; the plurality of heat management parts are arranged in the box body along a first direction, a battery monomer is arranged between every two adjacent heat management parts along the first direction, the heat management parts are provided with flow channels, and the flow channels are used for accommodating a fluid medium so as to manage the temperature of the battery monomers. The flow guide assembly is arranged in the box body and is connected with two adjacent heat management parts, the flow guide assembly and the battery monomers are arranged along a second direction, the flow guide assembly comprises a plurality of flow guide pipes, the plurality of flow guide pipes are arranged along a third direction, and the flow guide pipes are communicated with flow channels of two adjacent heat management parts; the first direction, the second direction and the third direction are not coplanar and intersect in pairs. According to the battery device, the volume energy density of the battery device can be improved, and the use performance of the battery device can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] Battery devices are widely used in portable electronic devices, electric vehicles, electric tools, drones, energy storage devices and other fields. In battery technology, in addition to considering the energy density of the battery device, the performance of the battery device is also an issue that cannot be ignored. Based on this, how to improve the performance of the battery device is an issue that needs to be solved urgently. Utility Model Content

[0004] The embodiments of the present application provide a battery device and an electrical device, which can improve the performance of the battery device.

[0005] In a first aspect, an embodiment of the present application provides a battery device, comprising a casing, a battery cell, a flow guide assembly and a plurality of thermal management components; the battery cell is disposed in the casing; the plurality of thermal management components are arranged in the casing along a first direction, a battery cell is disposed between two adjacent thermal management components along the first direction, the thermal management component has a flow channel, the flow channel is used to accommodate a fluid medium to manage the temperature of the battery cell; the flow guide assembly is disposed in the casing and connects two adjacent thermal management components, the flow guide assembly and the battery cell are arranged along a second direction, the flow guide assembly comprises a plurality of flow guide pipes, the plurality of flow guide pipes are arranged along a third direction, the flow guide pipes connect the flow channels of two adjacent thermal management components, the first direction, the second direction and the third direction are not coplanar and intersect with each other.

[0006] In the above technical solution, the flow guide assembly connects two adjacent thermal management components to facilitate the exchange of fluid media in the flow channel of the thermal management component. Since the flow guide assembly and the battery cell are arranged along the second direction, the flow guide assembly occupies the space of the battery device along the second direction. By arranging multiple flow guide tubes of the flow guide assembly along the third direction, on the one hand, the flow guide tubes arranged along the third direction can reduce the space of the battery device along the second direction occupied by the flow guide assembly, so that the battery device has more space to accommodate the battery cell, which helps to improve the volume energy density of the battery device; on the other hand, multiple flow guide tubes can improve the flow capacity of the flow guide assembly, so that the flow guide tube can replace more fluid media in the flow channel, improve the thermal management performance of the thermal management component, reduce the risk of performance degradation of the battery cell due to temperature imbalance, and improve the performance of the battery device.

[0007] In some embodiments, the flow guide assembly further includes a connector, which connects a plurality of flow guide tubes arranged along the third direction. Thus, on the one hand, the positions of the plurality of flow guide tubes arranged along the third direction are more stable, which helps to improve the connection stability between the flow guide tubes and the thermal management component; on the other hand, the connector connecting the plurality of flow guide tubes is conducive to the installation of the flow guide tubes, which reduces the difficulty of installing the flow guide tubes.

[0008] In some embodiments, the connecting member includes a connecting portion and a plurality of collars; the plurality of collars are arranged along the third direction, and each collar is sleeved on a flow guide tube; the connecting portion connects two adjacent collars. In this way, the connecting portion connects two adjacent collars, thereby making the positions of the two adjacent flow guide tubes along the third direction more stable, improving the position stability of the flow guide assembly, and reducing the difficulty of installing the flow guide assembly.

[0009] In some embodiments, along the first direction, the flow guide tube is located between two adjacent thermal management components, the thermal management components have a docking portion, and the flow guide tube is plugged and matched with the docking portions of the two adjacent thermal management components to connect the flow channels of the two adjacent thermal management components. By setting the docking portion to plug and match with the flow guide tube, on the one hand, the difficulty of installing the flow guide tube is reduced; on the other hand, there are docking portions at both ends of the flow guide tube to cooperate with it, which can limit the position of the flow guide tube, making the installation of the flow guide tube and the thermal management component more stable.

[0010] In some embodiments, the docking portion is at least partially inserted into the flow guide tube. In this way, the flow area of ​​the flow guide tube is larger than the flow area of ​​the docking portion, and the fluid medium is less likely to leak when passing through the flow guide component, thereby improving the flow capacity of the flow guide component.

[0011] In some embodiments, a sealing sleeve is disposed in the flow guide tube, and the docking portion is inserted in the sealing sleeve and has an interference fit with the sealing sleeve. In this way, the connection between the flow guide tube and the docking portion is more stable, and the risk of fluid medium leaking from between the flow guide tube and the docking portion is reduced.

[0012] In some embodiments, along the second direction, only one side of the battery cell is provided with a flow guide assembly, and the plurality of flow guide tubes include a first flow guide tube and a second flow guide tube, the first flow guide tube is used for allowing the fluid medium to enter the flow channel, and the second flow guide tube is used for allowing the fluid medium to exit the flow channel. By providing the flow guide assembly on only one side of the battery cell along the second direction, a box with a smaller size along the second direction can be provided, thereby reducing the volume of the battery device and improving the volume energy density of the battery device.

[0013] In some embodiments, multiple flow guide components are arranged between two adjacent thermal management components, and flow guide components are arranged on both sides of the battery cell along the second direction. In this way, multiple flow guide components can replace more fluid media in the thermal management component and improve the heat exchange capacity of the thermal management component. Flow guide components are arranged on both sides of the battery cell, so that the distribution of the flow guide components is more uniform, which is conducive to the flow guide components providing temperature-stable fluid media to the thermal management component.

[0014] In some embodiments, the plurality of flow guide components include a first flow guide component and a second flow guide component. Along the second direction, at least one battery cell is arranged between the first flow guide component and the second flow guide component. At least one flow guide tube in the first flow guide component is used for allowing the fluid medium to enter the flow channel, and at least one flow guide tube in the second flow guide component is used for allowing the fluid medium to exit the flow channel. In this way, the thermal management component can achieve the replacement of the fluid medium through the plurality of flow guide components, improve the replacement efficiency of the fluid medium, and also facilitate the installation of the flow guide component, reducing the difficulty of setting the flow guide component.

[0015] In some embodiments, the battery device includes a plurality of battery cell assemblies arranged along a first direction, a thermal management component is disposed between two adjacent battery cell assemblies, the battery cell assembly includes a plurality of battery cells, and a flow guide component is disposed on at least one side of each battery cell assembly along a second direction. By arranging the thermal management component on two adjacent battery cell assemblies, the thermal management component can manage the temperature of the battery cell assemblies on both sides thereof along the first direction. By arranging the flow guide component on at least one side of the battery cell assembly along the second direction, each thermal management component is connected through the flow guide component, thereby realizing the replacement of the fluid medium of each flow channel, and also enabling each battery cell to adjust its temperature through the thermal management component, thereby improving the performance of the battery device.

[0016] In some embodiments, the battery cell includes a shell, and along the third direction, the maximum size of the flow guide component is smaller than the maximum size of the shell. By setting the maximum size of the flow guide component along the third direction to be smaller than the maximum size of the shell, the influence of the flow guide component on the size of the battery device along the third direction can be reduced, thereby improving the volume energy density of the battery device.

[0017] In some embodiments, along the second direction, the box includes a first wall, and a flow guide assembly is arranged between the battery cell closest to the first wall and the first wall, and the minimum distance between the battery cell closest to the first wall and the first wall is D1; ​​along the third direction, the maximum size of the flow guide assembly is D2, and D1<D2. In this way, the arrangement of multiple flow guide tubes along the third direction can improve the flow capacity of the flow guide assembly on the basis of taking into account the volume energy density of the battery device, thereby improving the thermal management performance of the thermal management component, reducing the risk of performance degradation of the battery cell due to temperature imbalance, and improving the performance of the battery device.

[0018] In a second aspect, embodiments of the present application provide an electrical device, including a battery device provided by any embodiment of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0021] Figure 2 An exploded view of a battery device provided in some embodiments of the present application;

[0022] Figure 3 An exploded view of a battery cell provided for some embodiments of the present application;

[0023] Figure 4 An exploded view of a battery device provided in some embodiments of the present application;

[0024] Figure 5 Assembly diagram of thermal management components and flow guide components provided for some embodiments of the present application;

[0025] Figure 6 A schematic diagram of the structure of a flow guide assembly provided in some embodiments of the present application;

[0026] Figure 7 for Figure 5 AA section view;

[0027] Figure 8 for Figure 7 A partial enlarged view of the middle A area;

[0028] Fig. 9 An assembly diagram of a battery cell, a thermal management component, and a flow guide assembly provided for some embodiments of the present application;

[0029] Fig.10 A partial structural schematic diagram of a battery device provided in some embodiments of the present application;

[0030] Fig.11 A schematic diagram of the structure of a battery device provided in some embodiments of the present application.

[0031] Icons: 1-housing; 11-housing; 12-end cap; 2-electrode assembly; 3-electrode terminal; 101-battery cell assembly; 10-battery cell;

[0032] 20-box; 201-first box; 202-second box; 203-accommodation space;

[0033] 30-flow guide assembly; 301-flow guide pipe; 3011-sealing sleeve; 3012-first flow guide pipe; 3013-second flow guide pipe; 302-connecting piece; 3021-connecting part; 3022-ring; 303-first flow guide assembly; 304-second flow guide assembly;

[0034] 40- thermal management component; 401- docking part;

[0035] 100 - battery device; 200 - controller; 300 - motor; 1000 - vehicle; X - first direction; Y - second direction; Z - third direction. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0038] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0039] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0040] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0041] The term “plurality” used in this application refers to two or more (including two).

[0042] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0043] 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-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, and the like.

[0044] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to reduce the risk of short circuit between the positive and negative electrodes, while allowing active ions to pass through.

[0045] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0046] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0047] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, 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. may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may 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.).

[0048] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other traditional materials that can be used as positive electrode active materials for battery cells may also be used. These positive electrode active materials may be used alone or in combination of two or more. Among them, examples of lithium-containing phosphates may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon. Examples of lithium transition metal oxides 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, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3Mn 1 / 3 O2 (also referred to as NCM 333 )、LiNi 0.5 Co 0.2 Mn 0.3 O2 (also referred to as NCM 523 )、LiNi 0.5 Co 0.25 Mn 0.25 O2 (also referred to as NCM 211 )、LiNi 0.6 Co 0.2 Mn 0.2 O2 (also referred to as NCM 622 )、LiNi 0.8 Co 0.1 Mn 0.1 O2 (also referred to as NCM 811 ), lithium nickel cobalt aluminum oxide (such as LiNi 0.85 Co 0.15 Al 0.05 O2) and its modified compounds, etc.

[0049] In some embodiments, the positive electrode may be a foamed metal. The foamed metal may be a nickel foam, a copper foam, an aluminum foam, an alloy foam, etc. When the foamed metal is used as the positive electrode, the positive electrode active material may not be provided on the surface of the foamed metal, but of course, the positive electrode active material may also be provided. As an example, a lithium source material, potassium metal or sodium metal may also be filled or / and deposited in the foamed metal, and the lithium source material is lithium metal and / or a lithium-rich material.

[0050] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0051] As an example, the negative electrode current collector may be a metal foil, a foamed metal or a composite current collector. For example, as the metal foil, 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. may be used. The foamed metal may be foamed nickel, foamed copper, foamed aluminum, foamed alloy, etc. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may 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.).

[0052] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0053] As an example, the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is disposed on either or both of the two facing surfaces of the negative electrode current collector.

[0054] As an example, the negative electrode active material may adopt the negative electrode active material for battery cells known in the art. 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, lithium titanate, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0055] In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0056] In some embodiments, the separator is a separator membrane, which can be any known porous separator membrane with good chemical stability and mechanical stability.

[0057] As an example, the material of the separator may include at least one of glass fiber, non-woven 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 may be attached to the surface of the positive and negative electrodes.

[0058] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.

[0059] In some embodiments, the battery cell further includes an electrolyte, which plays a role in conducting ions between the positive and negative electrodes. The electrolyte can be liquid, gel or solid. Among them, the liquid electrolyte includes an electrolyte salt and a solvent.

[0060] In some embodiments, the electrolyte salt may include at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bisfluorosulfonyl imide, lithium bistrifluoromethanesulfonyl imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalatoborate, lithium dioxalatoborate, lithium difluorodioxalatophosphate, and lithium tetrafluorooxalatophosphate.

[0061] In some embodiments, the solvent may include at least one of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, cyclopentane, dimethyl sulfone, methyl ethyl sulfone and diethyl sulfone. The solvent may also be an ether solvent. The ether solvent may include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyltetrahydrofuran, diphenyl ether and crown ether.

[0062] Among them, the gel electrolyte includes a skeleton network with a polymer as the electrolyte, combined with an ionic liquid-lithium salt.

[0063] Among them, solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0064] As an example, the polymer solid electrolyte may be polyether (polyethylene oxide), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, a single ion polymer, polyionic liquid-lithium salt, cellulose, and the like.

[0065] As an example, the inorganic solid electrolyte may include an oxide solid electrolyte (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON film), a sulfide solid electrolyte (crystalline lithium superion conductor (lithium germanium phosphosulfide, silver germanium sulfide), amorphous sulfide) and one or more of a halide solid electrolyte, a nitride solid electrolyte and a hydride solid electrolyte.

[0066] As an example, the composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte.

[0067] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0068] In some embodiments, the electrode assembly is a laminate structure.

[0069] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets may be provided respectively, and the plurality of positive electrode sheets and the plurality of negative electrode sheets may be alternately stacked.

[0070] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet is folded to form a plurality of stacked folded segments, with a positive electrode sheet sandwiched between adjacent folded segments.

[0071] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of stacked folded sections.

[0072] As an example, a plurality of separators may be provided, each of which is provided between any adjacent positive electrode sheets or negative electrode sheets.

[0073] As an example, the separator may be disposed continuously, and may be disposed between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0074] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0075] In some embodiments, the electrode assembly is provided with tabs, which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0076] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0077] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery cell, such as a hexagonal battery cell.

[0078] The battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, in parallel or in mixed connection through a busbar.

[0079] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module.

[0080] As an example, a battery module may be formed by bundling a plurality of battery cells by cable ties.

[0081] In some embodiments, the battery device may be a battery pack, which may include a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0082] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0083] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0084] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0085] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0086] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0087] In some embodiments, the battery device refers to an energy storage device, which includes a box body, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0088] In a battery device, in order to manage the temperature of the battery cells in the box, it is usually necessary to set a thermal management component in the box. By passing a fluid medium into the thermal management component, the fluid medium can exchange heat with the battery cells to adjust the temperature of the battery cells. By replacing the fluid medium in the thermal management component, the efficiency of the thermal management component in managing the temperature of the battery cells is improved. For example, when the temperature of the battery cell is too high, a fluid medium with a lower temperature can be passed into the thermal management component. The fluid medium can absorb the temperature of the battery cell, thereby reducing the temperature of the battery cell, achieving temperature control of the battery cell, and improving the performance of the battery device.

[0089] Usually, pipelines are set in the battery device, and the thermal management components in the battery device replace the fluid medium through the pipelines. The larger the flow area of ​​the pipeline, the higher the efficiency of the fluid medium replacement of the thermal management component, which can improve the ability of the thermal management component to manage the temperature of the battery cell. However, a larger pipeline setting is likely to reduce the installation space of the battery cell in the battery device, reducing the volume energy density of the battery device.

[0090] In view of this, in order to take into account both the volume energy density of the battery device and the performance of the battery device, an embodiment of the present application provides a battery device, including a housing, a battery cell, a flow guide assembly and a plurality of thermal management components. The battery cell is disposed in the housing. A plurality of thermal management components are arranged in the housing along a first direction. A battery cell is disposed between two adjacent thermal management components along the first direction. The thermal management component has a flow channel, which is used to accommodate a fluid medium to manage the temperature of the battery cell. The flow guide assembly is disposed in the housing and connects two adjacent thermal management components. The flow guide assembly and the battery cell are arranged along a second direction. The flow guide assembly includes a plurality of flow guide pipes, and the plurality of flow guide pipes are arranged along a third direction. The flow guide pipes connect the flow channels of two adjacent thermal management components. The first direction, the second direction and the third direction are not coplanar and intersect with each other.

[0091] In such a battery device, the flow guide tubes arranged along the third direction can reduce the space occupied by the flow guide assembly in the second direction of the battery device, so that the battery device can have a smaller size in the second direction, which helps to improve the volume energy density of the battery device; multiple flow guide tubes can improve the flow capacity of the flow guide assembly, so that the flow guide tubes can replace more fluid media in the flow channel, improve the thermal management performance of the thermal management component, reduce the risk of performance degradation of the battery cell due to temperature imbalance, and improve the performance of the battery device.

[0092] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells and battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0093] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0094] Please refer to Figure 1 , Figure 1 The schematic diagram of the structure of the vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 is provided with a battery device 100 inside, and the battery device 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000.

[0095] The vehicle 1000 may further include a controller 200 and a motor 300 , wherein the controller 200 is used to control the battery device 100 to supply power to the motor 300 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1000 .

[0096] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0097] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery device 100 provided in some embodiments of the present application. The battery device 100 may include a case 20 and a battery cell 10 . The case 20 is used to accommodate the battery cell 10 .

[0098] Among them, a closed space for accommodating the battery cell 10 is formed inside the box 20. The box 20 can adopt a variety of structures. In some embodiments, the box 20 may include a first box 201 and a second box 202, and the first box 201 and the second box 202 are buckled with each other. The first box 201 and the second box 202 can be in various shapes, such as a cuboid, a cylinder, etc. The first box 201 can be a hollow structure with one side open, and the second box 202 can also be a hollow structure with one side open. The open side of the second box 202 and the open side of the first box 201 are buckled with each other to form a box 20 with a closed space. It is also possible that the first box 201 is a hollow structure with one side open, and the second box 202 is a plate-like structure. The second box 202 is buckled on the open side of the first box 201, so as to form a box 20 with a accommodating space 203.

[0099] In the battery device 100, there may be one or more battery cells 10. If there are more than one battery cell 10, the battery cells 10 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the battery cells 10 are both connected in series and in parallel. The battery modules may be formed by connecting the battery cells 10 in series, in parallel, or in a mixed connection, and then the battery modules are formed into a whole by connecting the battery cells in series, in parallel, or in a mixed connection, and then accommodated in the box 20. Alternatively, all the battery cells 10 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by all the battery cells 10 is accommodated in the box 20.

[0100] In some embodiments, the battery device 100 may further include a busbar, through which multiple battery cells 10 may be electrically connected to each other, so as to realize series connection, parallel connection or mixed connection of multiple battery cells 10. The busbar may be a metal conductor, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0101] Please refer to Figure 3 , Figure 3 An exploded view of a battery cell 10 provided in some embodiments of the present application. The battery cell 10 may include a housing 1 and an electrode assembly 2, wherein the electrode assembly 2 is accommodated in the housing 1.

[0102] In some embodiments, the housing 1 may include a shell 11 and an end cap 12, wherein the shell 11 has an opening, and the end cap 12 closes the opening of the shell 11. The closing here means covering or closing, which may be sealed or unsealed.

[0103] The shell 11 is a component for accommodating the electrode assembly 2. The shell 11 may be a hollow structure with an opening formed at one end, or a hollow structure with openings formed at opposite ends. The shell 11 may be in various shapes, such as a cylindrical shape, a rectangular parallelepiped shape, etc. The material of the shell 11 may be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. The electrode assembly 2 may be partially located in the shell 11, or may be completely located in the shell 11.

[0104] The end cap 12 and the shell 11 together define a receiving space for accommodating the electrode assembly 2 and other components. The end cap 12 can be connected to the shell 11 by welding, crimping, etc. to close the opening of the shell 11. The shape of the end cap 12 can be adapted to the shape of the shell 11. For example, the shell 11 is a rectangular parallelepiped structure, and the end cap 12 is a rectangular plate structure adapted to the shell 11. For another example, the shell 11 is a cylindrical structure, and the end cap 12 is a circular plate structure adapted to the shell 11. The material of the end cap 12 can also be a variety of materials, such as copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cap 12 and the shell 11 can be the same or different.

[0105] In the embodiment where the housing 11 is opened at one end, one end cap 12 may be provided. In the embodiment where the housing 11 is opened at two opposite ends, two end caps 12 may be provided, and the two end caps 12 respectively close the two openings of the housing 11, and the two end caps 12 and the housing 11 together define a receiving space.

[0106] In some embodiments, the battery cell 10 may further include an electrode terminal 3, which is disposed on the housing 1 and is used to electrically connect to the tab of the electrode assembly 2 to input or output the electrical energy of the battery cell 10. The electrode terminal 3 may be disposed on the shell 11 of the housing 1 or on the end cover 12 of the housing 1. The electrode terminal 3 may be directly connected to the tab, for example, the electrode terminal 3 is welded to the tab. The electrode terminal 3 may also be indirectly connected to the tab, for example, the electrode terminal 3 is indirectly connected to the tab through a current collecting member. The current collecting member may be a metal conductor, for example, copper, iron, aluminum, steel, aluminum alloy, etc.

[0107] As an example, Figure 3 As shown, an opening is formed at one end of the shell 11, and there is one end cap 12 in the shell 1, and one end cap 12 closes one opening of the shell 11. Two electrode terminals 3 are arranged on the end cap 12, and the two electrode terminals 3 are respectively a positive electrode terminal and a negative electrode terminal. A positive electrode tab and a negative electrode tab are formed at one end of the electrode assembly 2 facing the end cap 12, and the positive electrode terminal is electrically connected to the positive electrode tab, and the negative electrode terminal is electrically connected to the negative electrode tab.

[0108] Please refer to Figure 4-Figure 6 , Figure 4 An exploded view of a battery device 100 provided in some embodiments of the present application; Figure 5 An assembly diagram of a thermal management component 40 and a flow guide assembly 30 provided for some embodiments of the present application; Figure 6 A schematic diagram of the structure of a flow guide assembly 30 provided in some embodiments of the present application. The present application provides a battery device 100, including a housing 20, a battery cell 10, a flow guide assembly 30 and a plurality of thermal management components 40. The battery cell 10 is disposed in the housing 20. A plurality of thermal management components 40 are arranged in the housing 20 along a first direction X. A battery cell 10 is disposed between two adjacent thermal management components 40 along the first direction X. The thermal management component 40 has a flow channel (not shown in the figure), which is used to accommodate a fluid medium to manage the temperature of the battery cell 10. The flow guide assembly 30 is disposed in the housing 20 and connects two adjacent thermal management components 40. The flow guide assembly 30 and the battery cell 10 are arranged along a second direction Y. The flow guide assembly 30 includes a plurality of flow guide pipes 301. The plurality of flow guide pipes 301 are arranged along a third direction Z. The flow guide pipes 301 communicate with the flow channels of two adjacent thermal management components 40. The first direction X, the second direction Y and the third direction Z are not coplanar and intersect with each other.

[0109] The number of the battery cells 10 may be one or more. The box body 20 has a receiving space 203 , and the battery cells 10 are all received in the receiving space 203 .

[0110] A plurality of thermal management components 40 are arranged along the first direction X, and the thermal management components 40 are all located in the accommodation space 203. Two thermal management components 40 adjacent to each other along the first direction X may be arranged at intervals, so that a battery cell 10 is arranged between the two adjacent thermal management components 40; or two thermal management components 40 adjacent to each other along the first direction X may be partially in contact with each other, and the other parts may be away from each other to form a gap, and a battery cell 10 may be accommodated in the gap, so that a battery cell 10 is arranged between the two adjacent thermal management components 40. Two adjacent thermal management components 40 may be provided with one battery cell 10, or may be provided with multiple battery cells 10, and the number of battery cells 10 between each two adjacent thermal management components 40 may be equal or unequal. The thermal management component 40 may be provided on only one side of the battery cell 10 along the first direction X, or may be provided on both sides of the battery cell 10 along the first direction X.

[0111] The thermal management component 40 has a flow channel, and the fluid medium is contained in the flow channel. The fluid medium transfers heat to the thermal management component 40, and the thermal management component 40 performs heat exchange with the battery cell 10 to manage the temperature of the battery cell 10. The fluid medium can absorb the heat of the battery cell 10 or introduce heat to the battery cell 10, so that the temperature of the battery cell 10 can be maintained within a certain range. For example, the thermal management component 40 can be a water-cooled plate. When the temperature of the battery cell 10 increases, a fluid medium with a lower temperature can be introduced into the flow channel of the thermal management component 40. Such a fluid medium can absorb the heat of the battery cell 10 to reduce the temperature of the battery cell 10 and improve the working environment of the battery cell 10; for another example, when the temperature of the battery cell 10 is low, a fluid medium with a higher temperature can be introduced into the flow channel of the thermal management component 40. Such a fluid medium can conduct heat to the battery cell 10 to increase the temperature of the battery cell 10, improve the working environment of the battery cell 10, and thus improve the performance of the battery device 100. Among them, the fluid medium can be water, ethylene glycol aqueous solution, propylene glycol aqueous solution, fluorinated liquid, etc.

[0112] The flow guide assembly 30 is disposed in the accommodating space 203. The flow guide assembly 30 may be disposed on only one side of the battery cell 10 along the second direction Y; the flow guide assembly 30 may be disposed on both sides of the battery cell 10 along the second direction Y; or the flow guide assembly 30 may be disposed between two battery cells 10 adjacent to each other along the second direction Y. The flow guide assembly 30 connects two thermal management components 40 adjacent to each other along the first direction X. The flow guide assembly 30 includes a plurality of flow guide tubes 301, and the number of the flow guide tubes 301 may be two, three, four, five, six, seven, eight, etc. Each flow guide tube 301 is connected to the flow passages of two thermal management components 40 adjacent to each other along the first direction X, so that the thermal management component 40 can replace the fluid medium through each flow guide tube 301 of the flow guide assembly 30.

[0113] The plurality of flow guide tubes 301 are arranged along the third direction Z so that the space occupied by a single flow guide tube 301 along the second direction Y is substantially the same as the space occupied by the plurality of flow guide tubes 301 along the second direction Y. The size of the flow guide assembly 30 along the third direction Z may be greater than the size of the housing 1 of the battery cell 10 along the third direction Z, or may be less than or equal to the size of the housing 1 of the battery cell 10 along the third direction Z.

[0114] The first direction X, the second direction Y and the third direction Z are not located in the same plane, and any two of the first direction X, the second direction Y and the third direction Z may form an acute angle, an obtuse angle or a right angle. Exemplarily, the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0115] In the embodiment of the present application, the flow guide assembly 30 connects two adjacent thermal management components 40 to facilitate the exchange of fluid medium in the flow channel of the thermal management component 40. Since the flow guide assembly 30 and the battery cell 10 are arranged along the second direction Y, the flow guide assembly 30 occupies the space of the battery device 100 along the second direction Y. By arranging the multiple flow guide tubes 301 of the flow guide assembly 30 along the third direction Z, on the one hand, the flow guide tubes 301 arranged along the third direction Z can reduce the space of the battery device 100 along the second direction Y occupied by the flow guide assembly 30, so that the battery device 100 has more space to accommodate the battery cell 10, which helps to improve the volume energy density of the battery device 100; on the other hand, the multiple flow guide tubes 301 can improve the flow capacity of the flow guide assembly 30, so that the flow guide tubes 301 can replace more fluid medium in the flow channel, improve the thermal management performance of the thermal management component 40, reduce the risk of performance degradation of the battery cell 10 due to temperature imbalance, and improve the performance of the battery device 100.

[0116] In some embodiments, please refer to Figure 5 and Figure 6 The flow guide assembly 30 further includes a connecting member 302 , and the connecting member 302 connects a plurality of flow guide tubes 301 arranged along the third direction Z.

[0117] The connector 302 connects a plurality of guide tubes 301 arranged along the third direction Z, so that the position of the guide tube 301 of the guide assembly 30 along the third direction Z is relatively stable. The guide tube 301 and the connector 302 may be connected so that the positions of the two are relatively fixed; for example, the connector 302 and the guide tube 301 are bonded, clamped, or hot-melted; for another example, the guide tube 301 and the connector 302 are integrally injection molded. The guide tube 301 and the connector 302 may also be adjustable in position; for example, the connector 302 and the guide tube 301 are sleeved, and the guide tube 301 and the connector 302 are adjustable in position along the first direction X.

[0118] In this embodiment, on the one hand, the positions of the multiple guide tubes 301 arranged along the third direction Z are more stable, which helps to improve the connection stability between the guide tubes 301 and the thermal management component 40; on the other hand, the connector 302 connecting the multiple guide tubes 301 is conducive to the installation of the guide tubes 301 and reduces the difficulty of installing the guide tubes 301.

[0119] In some embodiments, please refer to Figure 6 The connecting member 302 includes a connecting portion 3021 and a plurality of collars 3022 . The plurality of collars 3022 are arranged along the third direction Z, and each collar 3022 is sleeved on a flow guide tube 301 . The connecting portion 3021 connects two adjacent collars 3022 .

[0120] The collars 3022 are arranged along the third direction Z so that the collars 3022 can be correspondingly sleeved on the flow guide tube 301. The collars 3022 may include a ring portion, which is arranged around the flow guide tube 301. One collar 3022 may include only one ring portion, which is sleeved on the flow guide tube 301; one collar 3022 may also include multiple ring portions, which are all sleeved on one flow guide tube 301. The connecting portion 3021 connects two collars 3022 adjacent to each other along the third direction Z so that the positions of the two collars 3022 are relatively stable. In the embodiment where there are two collars 3022, the two collars 3022 are sleeved on two flow guide tubes 301, and one connecting portion 3021 connects the two collars 3022. In the embodiment where there are three or more collars 3022 , each collar 3022 is sleeved on a flow guide tube 301 , and a connecting portion 3021 is provided between every two collars 3022 adjacent to each other along the third direction Z.

[0121] In this embodiment, the connecting portion 3021 connects two adjacent rings 3022 , so that the positions of the two adjacent guide tubes 301 along the third direction Z are more stable, thereby improving the position stability of the guide assembly 30 and reducing the difficulty of installing the guide assembly 30 .

[0122] In some embodiments, please refer to Figure 7 , Figure 7 for Figure 5 Along the first direction, the flow guide tube is located between two adjacent thermal management components, the thermal management component 40 has a docking portion 401, and the flow guide tube 301 is plugged and matched with the docking portions 401 of the two adjacent thermal management components 40 to connect the flow channels of the two adjacent thermal management components 40.

[0123] The thermal management component 40 may have only one docking portion 401, and the docking portion 401 is plugged and matched with the air guide tube 301. The thermal management component 40 may also have multiple docking portions 401, and the multiple docking portions 401 are all plugged and matched with the air guide tube 301. In the embodiment where the thermal management component 40 has multiple docking portions 401, the multiple docking portions 401 may be located on the same side of the thermal management component 40, or may be located on two opposite sides of the thermal management component 40 along the first direction X.

[0124] The docking portion 401 and the flow guide tube 301 are plugged together. At least part of the docking portion 401 can be inserted into the flow guide tube 301 so that the docking portion 401 and the flow guide tube 301 are plugged together; or a part of the flow guide tube 301 can be inserted into the docking portion 401 so that the docking portion 401 and the flow guide tube 301 are plugged together.

[0125] In this embodiment, by providing a docking portion 401 for plugging and cooperating with the guide tube 301, on the one hand, the difficulty of installing the guide tube 301 is reduced; on the other hand, there are docking portions 401 at both ends of the guide tube 301 to cooperate therewith, which can limit the position of the guide tube 301, making the installation of the guide tube 301 and the thermal management component 40 more stable.

[0126] In some embodiments, please refer to Figure 7 The docking portion 401 is at least partially inserted into the flow guide tube 301 .

[0127] The entire docking portion 401 may be inserted into the flow guiding tube 301 , or only a portion of the docking portion 401 may be inserted into the flow guiding tube 301 , and the other portion may be located outside the flow guiding tube 301 .

[0128] In this embodiment, the docking portion 401 is inserted into the guide tube 301. When the fluid in the thermal management component 40 flows into the guide tube 301, since the inner diameter of the guide tube 301 can be larger than the inner diameter of the docking portion 401, the resistance of the tube wall of the guide tube 301 to the fluid medium can be reduced, thereby improving the flow capacity of the guide tube 301. The flow area of ​​the guide tube 301 is larger than the flow area of ​​the docking portion 401. The fluid medium is less likely to leak when passing through the guide component 30, thereby improving the flow capacity of the guide component 30.

[0129] In some embodiments, please refer to Figure 7 and Figure 8 , Figure 8 for Figure 7 A partial enlarged view of the area A in the middle. A sealing sleeve 3011 is disposed in the flow guide tube 301 , and the docking portion 401 is inserted into the sealing sleeve 3011 and has an interference fit with the sealing sleeve 3011 .

[0130] The sealing sleeve 3011 may be bonded to the inner wall of the flow guide tube 301, or the sealing sleeve 3011 may be coated on the inner wall of the flow guide tube 301. The sealing sleeve 3011 is arranged on the inner wall of the flow guide tube 301. When the docking portion 401 is inserted into the sealing sleeve 3011, the flow guide tube 301 and the docking portion 401 cooperate to squeeze the sealing sleeve 3011, so that the docking portion 401 and the sealing sleeve 3011 have an interference fit, thereby achieving sealing between the docking portion 401 and the flow guide tube 301.

[0131] In this embodiment, the connection between the flow guiding tube 301 and the docking portion 401 is more stable, and the risk of leakage of the fluid medium from between the flow guiding tube 301 and the docking portion 401 is reduced.

[0132] In some embodiments, please refer to Fig. 9 , Fig. 9 The assembly diagram of the battery cell 10, the thermal management component 40 and the flow guide assembly 30 provided in some embodiments of the present application. Along the second direction Y, the flow guide assembly 30 is only provided on one side of the battery cell 10, and the plurality of flow guide pipes 301 include a first flow guide pipe 3012 and a second flow guide pipe 3013. The first flow guide pipe 3012 is used for the fluid medium to enter the flow channel, and the second flow guide pipe 3013 is used for the fluid medium to discharge the flow channel.

[0133] The guide component 30 may be arranged on one side of all the battery cells 10 in the box 20 along the second direction Y; or the guide component 30 may be arranged between two adjacent battery cells 10 along the second direction Y, so that only one side of any battery cell 10 along the second direction Y is provided with a battery cell 10.

[0134] In this embodiment, by providing the guide assembly 30 on only one side of the battery cell 10 along the second direction Y, a box body 20 with a smaller size along the second direction Y can be provided, thereby reducing the volume of the battery device 100 and improving the volume energy density of the battery device 100.

[0135] In some embodiments, please refer to Fig.10 , Fig.10 A partial structural diagram of a battery device 100 provided in some embodiments of the present application. A plurality of flow guiding components 30 are arranged between two adjacent thermal management components 40 , and along the second direction Y, flow guiding components 30 are arranged on both sides of the battery cell 10 .

[0136] There may be two, three, four, etc. flow guiding components 30 between two adjacent thermal management components 40. Along the second direction Y, there may be one or more flow guiding components on any side of the battery cell 10.

[0137] In this embodiment, multiple flow guide components 30 can replace more fluid media in the thermal management component 40, thereby improving the heat exchange capacity of the thermal management component 40. The flow guide components 30 are arranged on both sides of the battery cell 10, so that the distribution of the flow guide components 30 is more uniform, which is conducive to the flow guide components 30 providing a temperature-stable fluid medium to the thermal management component 40.

[0138] In some embodiments, a plurality of flow guiding assemblies 30 may be arranged at intervals along the second direction Y, and a battery cell 10 may be arranged between two adjacent flow guiding assemblies 30 along the second direction Y.

[0139] In some embodiments, multiple flow guide components 30 include a first flow guide component 303 and a second flow guide component 304. Along the second direction Y, at least one battery cell 10 is arranged between the first flow guide component 303 and the second flow guide component 304. At least one flow guide tube 301 in the first flow guide component 303 is used to allow the fluid medium to enter the flow channel, and at least one flow guide tube 301 in the second flow guide component 304 is used to allow the fluid medium to discharge the flow channel.

[0140] The plurality of flow guide tubes 301 in the first flow guide component 303 may all be used to allow the fluid medium to enter the flow channel; or a portion of the flow guide tubes 301 in the first flow guide component 303 may be used to allow the fluid medium to enter the flow channel, and another portion of the flow guide tubes 301 may be used to allow the fluid medium to exit the flow channel. The plurality of flow guide tubes 301 in the second flow guide component 304 may be used to allow the fluid medium to exit the flow channel; or a portion of the flow guide tubes 301 in the second flow guide component 304 may be used to allow the fluid medium to enter the flow channel, and another portion of the flow guide tubes 301 may be used to allow the fluid medium to exit the flow channel.

[0141] The plurality of flow guide components 30 may include only one first flow guide component 303 or multiple first flow guide components 303. The plurality of flow guide components 30 may include only one second flow guide component 304 or multiple second flow guide components 304.

[0142] In this embodiment, the thermal management component 40 can achieve the replacement of the fluid medium through multiple flow guide components 30, thereby improving the replacement efficiency of the fluid medium, facilitating the installation of the flow guide components 30, and reducing the difficulty of setting up the flow guide components 30.

[0143] In some embodiments, please refer to Fig.10 The battery device 100 includes a plurality of battery cell assemblies 101 arranged along a first direction X, a thermal management component 40 is disposed between two adjacent battery cell assemblies 101, and the battery cell assembly 101 includes a plurality of battery cells 10. Along a second direction Y, a flow guide assembly 30 is disposed on at least one side of each battery cell assembly 101.

[0144] The number of battery cells 10 in the multiple battery cell assemblies 101 may be equal or unequal. Each battery cell assembly 101 may have multiple battery cells 10, for example, the battery cell assembly 101 includes four battery cells 10. The flow guide assembly 30 may be provided on only one side of the battery cell assembly 101 along the second direction Y, or on both sides of the battery cell assembly 101 along the second direction Y.

[0145] In this embodiment, by arranging the thermal management components 40 on two adjacent battery cell assemblies 101, the thermal management components 40 can manage the temperature of the battery cell assemblies 101 on both sides along the first direction X. By arranging the flow guide assembly 30 on at least one side of the battery cell assembly 101 along the second direction Y, each thermal management component 40 is connected through the flow guide assembly 30, thereby realizing the replacement of the fluid medium of each flow channel, and also enabling each battery cell 10 to adjust its temperature through the thermal management component 40, thereby improving the performance of the battery device 100.

[0146] In some embodiments, the battery cell 10 includes a housing 1 , and along the third direction Z, the maximum dimension of the flow guide assembly 30 is smaller than the maximum dimension of the housing 1 .

[0147] The multiple guide tubes 301 of the guide assembly 30 are arranged along the third direction Z, and the maximum size of the guide assembly 30 along the third direction Z is the distance between the two positions of the guide assembly 30 that are farthest apart along the third direction Z. The two positions may be located on two guide tubes 301 respectively; one of the two positions may be located on one guide tube 301 and the other may be located on the connector 302; or the two positions may be located on the connector 302 respectively.

[0148] The maximum size of the housing 1 is the distance between the two positions of the housing 1 that are farthest apart along the third direction Z. The two positions may be located on the end cover 12, or both positions may be located on the shell 11, or one of the two positions may be located on the shell 11 and the other may be located on the end cover 12.

[0149] In this embodiment, the guide assembly 30 and the battery cell 10 are both arranged in the box body 20. Along the third direction Z, the maximum size of the guide assembly 30 is smaller than the maximum size of the outer shell 1, so that in the third direction Z, the space occupied by the guide assembly 30 is smaller than the space occupied by the outer shell 1, which can reduce the influence of the guide assembly 30 on the size of the battery device 100 along the third direction Z and improve the volume energy density of the battery device 100.

[0150] In some embodiments, please refer to Fig.11 , Fig.11A schematic diagram of the structure of a battery device 100 provided in some embodiments of the present application. Along the second direction Y, the box body 20 includes a first wall, and a flow guide assembly 30 is arranged between the battery cell 10 closest to the first wall and the first wall, and the minimum distance between the battery cell 10 closest to the first wall and the first wall is D1. Along the third direction Z, the maximum size of the flow guide assembly 30 is D2, and D1<D2.

[0151] The maximum size of the flow guide assembly 30 along the third direction Z is the distance between the two positions of the flow guide assembly 30 that are farthest apart along the third direction Z. The minimum distance between the battery cell 10 closest to the first wall and the first wall is D1, so that the maximum size of the flow guide tube 301 is less than or equal to D1, and D1<D2 can realize the installation of multiple flow guide tubes 301 along the third direction Z, thereby improving the space utilization rate of the accommodation space 203.

[0152] In this embodiment, multiple flow guide tubes 301 are arranged along the third direction Z, which can improve the current flow capacity of the flow guide assembly 30 while taking into account the volume energy density of the battery device 100, thereby improving the thermal management performance of the thermal management component 40, reducing the risk of performance degradation of the battery cell 10 due to temperature imbalance, and improving the performance of the battery device 100.

[0153] An embodiment of the present application provides an electrical device, including the battery device 100 provided in any one of the above embodiments.

[0154] Please continue to refer to Figure 4-Figure 8The embodiment of the present application provides a battery device 100, including a housing 20, a battery cell 10, a flow guide assembly 30 and a plurality of thermal management components 40. The battery cell 10 is disposed in the housing 20. The plurality of thermal management components 40 are arranged in the housing 20 along a first direction X. A battery cell 10 is disposed between two adjacent thermal management components 40 along the first direction X. The thermal management component 40 has a flow channel, which is used to accommodate a fluid medium to manage the temperature of the battery cell 10. The flow guide assembly 30 is disposed in the housing 20 and connects two adjacent thermal management components 40. The flow guide assembly 30 and the battery cell 10 are arranged along a second direction Y. The flow guide assembly 30 includes a plurality of flow guide pipes 301, and the plurality of flow guide pipes 301 are arranged along a third direction Z. The flow guide pipes 301 communicate with the flow channels of two adjacent thermal management components 40. The first direction X, the second direction Y and the third direction Z are not coplanar and intersect with each other. The flow guide assembly 30 also includes a connector 302, which connects a plurality of flow guide tubes 301 adjacent to each other along a third direction Z. The connector 302 includes a connector 3021 and a plurality of collars 3022. The plurality of collars 3022 are arranged along the third direction Z, and each collar 3022 is sleeved on a flow guide tube 301; the connector 3021 connects two adjacent collars 3022. The thermal management component 40 has a docking portion 401, and the flow guide tube 301 is plugged and matched with the docking portions 401 of two adjacent thermal management components 40 to connect the flow channels of the two adjacent thermal management components 40. A sealing sleeve 3011 is provided in the flow guide tube 301, and the docking portion 401 is inserted in the sealing sleeve 3011 and has an interference fit with the sealing sleeve 3011. Along the second direction Y, the box 20 includes a first wall, and a flow guide assembly 30 is disposed between the battery cell 10 closest to the first wall and the first wall, and the minimum distance between the battery cell 10 closest to the first wall and the first wall is D1. Along the third direction Z, the size of the flow guide assembly 30 is D2, D2>D1.

[0155] In this embodiment, the flow guide assembly 30 connects two adjacent thermal management components 40 to facilitate the exchange of fluid media in the flow channel of the thermal management component 40. Since the flow guide assembly 30 and the battery cell 10 are arranged along the second direction Y, the flow guide assembly 30 occupies the space of the battery device 100 along the second direction Y. By arranging the multiple flow guide tubes 301 of the flow guide assembly 30 along the third direction Z, on the one hand, the flow guide tubes 301 arranged along the third direction Z can reduce the space occupied by the flow guide assembly 30 in the battery device 100 along the second direction Y, so that the battery device 100 can have a smaller size in the second direction Y, which helps to improve the volume energy density of the battery device 100; on the other hand, the multiple flow guide tubes 301 can improve the flow capacity of the flow guide assembly 30, so that the flow guide tubes 301 can replace more fluid media in the flow channel, improve the thermal management performance of the thermal management component 40, reduce the risk of performance degradation of the battery cell 10 due to temperature imbalance, and improve the performance of the battery device 100. The flow guide assembly 30 connects two adjacent thermal management components 40 to facilitate the exchange of fluid media in the flow channel of the thermal management component 40. Since the flow guide assembly 30 and the battery cell 10 are arranged along the second direction Y, the flow guide assembly 30 occupies the space of the battery device 100 along the second direction Y. By arranging the multiple flow guide tubes 301 of the flow guide assembly 30 along the third direction Z, on the one hand, the flow guide tubes 301 arranged along the third direction Z can reduce the space occupied by the flow guide assembly 30 in the battery device 100 along the second direction Y, so that the battery device 100 can have a smaller size in the second direction Y, which helps to improve the volume energy density of the battery device 100; on the other hand, the multiple flow guide tubes 301 can improve the flow capacity of the flow guide assembly 30, so that the flow guide tubes 301 can replace more fluid media in the flow channel, improve the thermal management performance of the thermal management component 40, reduce the risk of performance degradation of the battery cell 10 due to temperature imbalance, and improve the performance of the battery device 100. By providing an interference fit between the docking portion 401 and the sealing sleeve 3011, the connection between the flow guide tube 301 and the docking portion 401 is more stable, and the risk of leakage of the fluid medium from between the flow guide tube 301 and the docking portion 401 is reduced. Arranging multiple flow guide tubes 301 along the third direction Z can improve the flow capacity of the flow guide assembly 30 on the basis of taking into account the volume energy density of the battery device 100, thereby improving the thermal management performance of the thermal management component 40, reducing the risk of performance degradation of the battery cell 10 due to temperature imbalance, and improving the performance of the battery device 100.

[0156] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0157] The above embodiments are only used to illustrate the technical solution of the present application and are not used to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: Box; A battery cell is disposed in the box; A plurality of thermal management components are arranged in the box along a first direction, the battery cells are arranged between two adjacent thermal management components along the first direction, the thermal management components have flow channels, and the flow channels are used to accommodate a fluid medium to manage the temperature of the battery cells; A flow guide component is arranged in the box body and connects two adjacent thermal management components. The flow guide component and the battery cells are arranged along the second direction. The flow guide component includes a plurality of flow guide tubes. The plurality of flow guide tubes are arranged along the third direction. The flow guide tubes connect the flow channels of two adjacent thermal management components. The first direction, the second direction and the third direction are not coplanar and intersect with each other.

2. The battery device according to claim 1, characterized in that: The flow guide assembly further includes a connecting piece, and the connecting piece connects the plurality of flow guide pipes arranged along the third direction.

3. The battery device according to claim 2, characterized in that: The connecting piece comprises: A plurality of collars are arranged along the third direction, and each collar is sleeved on one of the guide pipes; The connecting portion connects two adjacent rings.

4. The battery device according to claim 1, wherein: Along the first direction, the flow guide pipe is located between two adjacent thermal management components, the thermal management components have a docking portion, and the flow guide pipe is plugged into and matched with the docking portions of the two adjacent thermal management components to connect the flow channels of the two adjacent thermal management components.

5. The battery device according to claim 4, characterized in that: The docking portion is at least partially inserted into the flow guide tube.

6. The battery device according to claim 5, characterized in that A sealing sleeve is arranged in the guide pipe, and the docking portion is inserted in the sealing sleeve and has an interference fit with the sealing sleeve.

7. The battery device according to any one of claims 1 to 6, characterized in that: Along the second direction, the flow guide assembly is only provided on one side of the battery cell, and the plurality of flow guide tubes include a first flow guide tube and a second flow guide tube, the first flow guide tube is used for allowing the fluid medium to enter the flow channel, and the second flow guide tube is used for allowing the fluid medium to discharge from the flow channel.

8. The battery device according to any one of claims 1 to 6, characterized in that: A plurality of the flow guide components are arranged between two adjacent thermal management components, and the flow guide components are arranged on both sides of the battery cell along the second direction.

9. The battery device according to claim 8, characterized in that: The multiple flow guide components include a first flow guide component and a second flow guide component. Along the second direction, at least one battery cell is arranged between the first flow guide component and the second flow guide component. At least one flow guide tube in the first flow guide component is used for allowing the fluid medium to enter the flow channel, and at least one flow guide tube in the second flow guide component is used for allowing the fluid medium to discharge from the flow channel.

10. The battery device according to any one of claims 1 to 6, characterized in that: The battery device includes a plurality of battery cell assemblies arranged along the first direction, the thermal management component is arranged between two adjacent battery cell assemblies, the battery cell assembly includes a plurality of battery cells, and the flow guide assembly is arranged on at least one side of each battery cell assembly along the second direction.

11. The battery device according to any one of claims 1 to 6, characterized in that: The battery cell includes a shell, and along the third direction, the maximum dimension of the flow guide component is smaller than the maximum dimension of the shell.

12. The battery device according to any one of claims 1 to 6, characterized in that: Along the second direction, the box body includes a first wall, the flow guide assembly is arranged between the battery cell closest to the first wall and the first wall, and the minimum distance between the battery cell closest to the first wall and the first wall is D1; Along the third direction, the maximum size of the flow guide component is D2, and D1<D2.

13. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1-12.

Images