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 and a battery monomer assembly, the box includes a first beam. The battery single body assembly is contained in the box body, first beams are arranged on the two sides of the battery single body assembly in the first direction, the battery single body assembly comprises a plurality of battery single bodies arranged in the first direction, and the battery single body, closest to the first beams, in the battery single body assembly directly or indirectly abuts against the first beams in the first direction. The heat management part is arranged between two adjacent battery monomers along a first direction; the heat management part is provided with a first flow channel; wherein the first beam is provided with a first flow channel, the first beam is provided with a second flow channel, the first flow channel and the second flow channel are communicated, and the first flow channel and the second flow channel are used for accommodating a heat exchange medium to manage the temperature of the battery monomer. According to the battery device, the reliability of the battery device and the volume energy density of the battery device are both improved.

Description

Technical Field

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

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

[0003] Battery devices are widely used in portable electronic devices, electric vehicles, power tools, drones, energy storage devices, and other fields. In battery technology, besides considering the performance of the battery device, its volumetric energy density is also a crucial factor. Therefore, improving the volumetric energy density of battery devices is an urgent problem to be solved. Utility Model Content

[0004] This application provides a battery device and an electrical device that can improve the volumetric energy density of the battery device.

[0005] In a first aspect, embodiments of this application provide a battery device, including a housing and a battery cell assembly; the housing includes a first beam; the battery cell assembly is housed within the housing, and along a first direction, first beams are provided on both sides of the battery cell assembly, the battery cell assembly includes a plurality of battery cells arranged along the first direction, and along the first direction, battery cells adjacent to the first beams directly or indirectly abut against the first beams; a thermal management component is disposed between two adjacent battery cells along the first direction, and the thermal management component is provided with a first flow channel; wherein, the first beam is provided with a second flow channel, the first flow channel and the second flow channel are connected, and the first flow channel and the second flow channel are used to contain a heat exchange medium to manage the temperature of the battery cells.

[0006] In the above technical solution, by setting a thermal management component between two adjacent battery cells along the first direction, the thermal management component can manage the temperature of the battery cells on both sides of the first direction. The first beam, equipped with a second flow channel, abuts against the battery cells, which helps improve the heat exchange efficiency between the first beam and the battery cells, facilitating the first beam's management of the battery cell temperature. In such a battery device, both the thermal management component and the first beam can manage the battery cell temperature. On the one hand, this reduces the risk of thermal runaway in the battery cells and improves their reliability. On the other hand, it reduces the need for a thermal management component between the two first beams, saving internal space in the housing and freeing up more space for the battery cells, thus increasing the volumetric energy density of the battery device. Therefore, such a battery device balances improving both the reliability and volumetric energy density of the battery device.

[0007] In some embodiments, the battery device further includes a flow guide pipe and multiple thermal management components. The multiple thermal management components are arranged along a first direction, with a battery cell disposed between adjacent thermal management components along the first direction. The flow guide pipe is housed within a housing and arranged along a second direction with the battery cell assembly. The flow guide pipe has a flow channel, and the second flow channel of the first beam and the first flow channels of the multiple thermal management components are all connected to the flow channel. The second direction is perpendicular to the first direction. By providing multiple thermal management components, they can jointly manage the temperature of the battery cells within the housing, improving the temperature management effect of the battery cells and enhancing their reliability. The fact that the second flow channel of the first beam and the first flow channels of the multiple thermal management components are all connected to the flow channel reduces the difficulty of conducting the heat exchange medium within the second and first flow channels, resulting in a more uniform temperature of the battery cells within the housing and improving their reliability.

[0008] In some embodiments, the first beam is provided with a first insertion part, which is inserted into the guide pipe to connect the guide channel and the second flow channel. This facilitates the inspection and replacement of the guide pipe and reduces the difficulty and cost of installing the guide pipe.

[0009] In some embodiments, the first insertion portion protrudes from the surface of the first beam facing the battery cell assembly. This allows the guide tube to be inserted into the surface protruding from the first beam facing the battery cell assembly, reducing the difficulty of connecting the guide tube and the first beam.

[0010] In some embodiments, the first connector is detachably connected to the first beam. This reduces the maintenance difficulty of the first connector and extends the service life of the first beam and the guide tube.

[0011] In some embodiments, along the second direction, guide pipes are provided on both sides of the battery cell assembly. The guide pipe on one side of the battery cell assembly is a liquid inlet pipe, and the guide pipe on the other side of the battery cell assembly is a liquid outlet pipe. In this way, the heat exchange medium in one guide pipe can flow into the second flow channel and flow out through the other guide pipe after heat exchange with the first beam, reducing the difficulty of replacing the heat exchange medium in the first beam and improving the thermal management performance of the first beam for the battery cells.

[0012] In some embodiments, multiple guide pipes are provided on the same side of the battery cell assembly along the second direction, at least one guide pipe being a liquid inlet pipe and at least one guide pipe being a liquid outlet pipe. By arranging multiple guide pipes on the same side of the battery cell assembly along the second direction, the space occupied by the multiple guide pipes along the second direction can be reduced, improving the space utilization of the housing, which is beneficial for setting more battery cells in the housing and increasing the volumetric energy density of the battery device.

[0013] In some embodiments, the battery cell includes a housing having a first surface facing the first beam along a first direction. At least a portion of the orthographic projection of the second flow channel lies within the orthographic projection of the first surface of the battery cell closest to the first beam in the battery cell assembly. This allows the battery cell abutting the first beam to be positioned closer to the second flow channel, facilitating heat exchange between the heat exchange medium within the second flow channel and the battery cell, thereby improving the thermal management performance of the first beam for the battery cell.

[0014] In some embodiments, the thermal conductivity of the first beam is greater than or equal to 100 W / (m·K). This improves the heat exchange efficiency between the heat exchange medium and the battery cells in the second flow channel, and enhances the thermal management performance of the first beam for the battery cells.

[0015] In some embodiments, the first beam is made of aluminum alloy, copper alloy, magnesium alloy, or steel. This allows the first beam to possess high strength and strong thermal conductivity, improving its ability to confine the position of the battery cells and its thermal management performance for the battery cells.

[0016] In some embodiments, the battery device further includes a flow guide tube having a flow channel communicating with a second flow channel of a first beam located on both sides of the battery cell assembly along a first direction; the housing includes an inlet for the heat exchange medium to flow into the second flow channel and an outlet for the heat exchange medium to exit the second flow channel; one of the inlet and the outlet is disposed on one first beam, and the other is disposed on another first beam; or the inlet and the outlet are both disposed on the same first beam. This reduces the difficulty of the heat exchange medium flowing into or out of the battery device. On the one hand, the first beam can manage the temperature of the battery cells; on the other hand, it reduces the difficulty of the heat exchange medium flowing through the flow guide tube.

[0017] In some embodiments, the battery device further includes a control module for electrically controlling the individual battery cells. The housing includes an electrical compartment and a battery compartment, with the control module housed in the electrical compartment and the individual battery cell assembly housed in the battery compartment. The housing has a partition beam separating the electrical compartment and the battery compartment. Both the sidewall of the battery compartment facing away from the electrical compartment along a first direction and the partition beam serve as the first beam. Thus, on the one hand, the partition beam separates the electrical compartment and the battery compartment, reducing the risk of interference between them and improving the structural strength of the battery device; on the other hand, the first beam manages the temperature of the individual battery cells within the battery compartment, reducing the risk of thermal runaway and improving the reliability of the battery device. Furthermore, the fact that the sidewall of the battery compartment facing away from the electrical compartment along the first direction is the first beam makes the first beam the outer wall of the housing, reducing the difficulty of circulating the heat exchange medium through the first beam.

[0018] In some embodiments, the battery cell includes a housing, and along a first direction, the housing has a first surface, which is the surface with the largest outer surface area in the housing. This increases the contact area between the battery cell and the first beam, thereby improving the thermal management performance of the first beam on the battery cell.

[0019] Secondly, embodiments of this application provide an electrical device, including the battery device provided in any one of the embodiments of the first aspect. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0022] Figure 2 Exploded views of battery devices provided in some embodiments of this application;

[0023] Figure 3 Exploded views of a single battery cell provided in some embodiments of this application;

[0024] Figure 4 Exploded views of a battery device provided in some embodiments of this application;

[0025] Figure 5 A schematic diagram of the structure of the first beam provided for some embodiments of this application;

[0026] Figure 6 This is an assembly diagram of a battery cell and a thermal management component provided in some embodiments of this application;

[0027] Figure 7 This is a partial structural schematic diagram of a battery device provided in some embodiments of this application;

[0028] Figure 8 for Figure 7 A magnified view of a portion of region A in the middle;

[0029] Figure 9 An assembly diagram of the first beam, the first insertion part, and the guide tube provided for some embodiments of this application;

[0030] Figure 10 A partial structural schematic diagram of a battery device provided for some embodiments of this application;

[0031] Figure 11This is a schematic diagram of the structure of a battery device provided in some embodiments of this application;

[0032] Figure 12 This is a partial structural diagram of the box provided in some embodiments of this application;

[0033] Figure 13 This is a partial structural diagram of the box provided in some embodiments of this application;

[0034] Figure 14 This is a partial structural diagram of the box provided in some embodiments of this application;

[0035] Figure 15 This is a partial structural schematic diagram of a battery device provided in some embodiments of this application.

[0036] Icons: 1-First beam; 11-Second flow channel; 12-First insertion part; 13-Second surface; 2-Electrical compartment; 3-Battery compartment; 4-Separation beam; 5-Side beam; 6-Inlet; 7-Outlet; 8-First side wall; 10-Box body; 101-First box body; 102-Second box body;

[0037] 20 - Battery cell assembly; 201 - Battery cell; 2011 - Housing; 20111 - Housing; 20112 - End cap; 20113 - First surface; 2012 - Electrode assembly; 2013 - Electrode terminal;

[0038] 30 - Thermal management component; 40 - Flow guide tube; 401 - Flow guide channel; 50 - Control module;

[0039] 100 - Battery device; 200 - Controller; 300 - Motor; 1000 - Vehicle; X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0042] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0043] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0044] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0045] In this application, "multiple" means two or more (including two).

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] As an example, the positive electrode current collector can be a foil or a composite current collector. For example, as a foil, it can be aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, or titanium, etc. Composite current collectors can include a polymer material base layer and a metal layer. Composite current collectors can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0052] 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 positive electrode active materials in battery cells 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 iron manganese phosphate, and lithium iron manganese 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 LiNi). 1 / 3 Co 1 / 3Mn 1 / 3 O2 (also known as NCM) 333 LiNi 0.5 Co 0.2 Mn 0.3 O2 (also known as NCM) 523 LiNi 0.5 Co 0.25 Mn 0.25 O2 (also known as NCM) 211 LiNi 0.6 Co 0.2 Mn0.2 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.

[0053] 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.

[0054] In some embodiments, the negative electrode can be a negative electrode sheet, and the negative electrode sheet can include a negative current collector.

[0055] As an example, the negative electrode current collector can be a foil, a foamed metal, or a composite current collector. For example, as a foil, it can be aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, or titanium, etc. The foamed metal can be nickel foam, copper foam, aluminum foam, foam alloy, etc. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector 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.).

[0056] 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.

[0057] 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.

[0058] 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 negative electrode active materials in battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0059] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] Among them, the gel electrolyte includes a polymer as the electrolyte backbone network, combined with an ionic liquid - lithium salt.

[0067] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0068] 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.

[0069] 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.

[0070] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0071] In some embodiments, the electrode assembly is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0072] In some implementations, the electrode assembly is a stacked structure.

[0073] As an example, multiple positive and negative electrode plates can be set, and multiple positive and multiple negative electrode plates can be stacked alternately.

[0074] 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.

[0075] As an example, both the positive and negative electrode sheets are folded to form multiple stacked folded segments.

[0076] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0077] As an example, the separator can be continuously arranged between any adjacent positive or negative electrode plates by folding or rolling.

[0078] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0079] 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.

[0080] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0081] 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.

[0082] 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.

[0083] 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 multiple battery cells and fixing them together to form an independent module.

[0084] As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0085] In some embodiments, the battery device may be a battery pack, which may include a housing and one or more individual battery cell assemblies housed within the housing.

[0086] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing by fixing the battery module in the housing.

[0087] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0088] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0089] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0090] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0091] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0092] In battery packs, to manage the temperature of individual battery cells within the enclosure, components are typically installed between the enclosure's beams and the cells to regulate their temperature, thereby reducing the risk of thermal runaway and improving the overall reliability of the battery pack. However, these components occupy space within the enclosure, affecting cell placement and reducing the pack's volumetric energy density. This creates a trade-off between the battery pack's reliability and its volumetric energy density.

[0093] In view of this, in order to balance the volumetric energy density and reliability of the battery device, this application provides a battery device including a housing and a battery cell assembly. The housing includes a first beam. The battery cell assembly is housed within the housing and arranged along a first direction with the first beam. The battery cell assembly includes multiple battery cells arranged along the first direction, and along the first direction, the battery cell closest to the first beam directly or indirectly abuts against the first beam. A thermal management component is disposed between two adjacent battery cells along the first direction, and the thermal management component has a first flow channel. The first beam has a second flow channel, which is connected to the first flow channel. The first and second flow channels are used to contain a heat exchange medium to manage the temperature of the battery cells.

[0094] In this battery device, a thermal management component is placed between two adjacent battery cells along a first direction. This component manages the temperature of the battery cells on both sides of the first direction. The first beam, equipped with a second flow channel, abuts against the battery cells, improving the heat exchange efficiency between the beam and the cells and facilitating temperature management. In this battery device, both the thermal management component and the first beam manage the battery cell temperature. This reduces the risk of thermal runaway and improves the reliability of the battery cells. Furthermore, it reduces the need for a separate thermal management component between the battery cells and the first beam, saving internal space and freeing up more room for the battery cells, thus increasing the volumetric energy density of the battery device. Therefore, this battery device balances improved reliability and increased volumetric energy density.

[0095] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells and battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0096] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0097] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 may be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000.

[0098] The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0099] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0100] Please refer to Figure 2 , Figure 2 The following is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 may include a housing 10 and a battery cell 201, wherein the housing 10 is used to house the battery cell 201.

[0101] The housing 10 has an enclosed space inside for accommodating the battery cells 201. The housing 10 can have various structures. In some embodiments, the housing 10 may include a first housing 101 and a second housing 102, which are interlocked. The first housing 101 and the second housing 102 can have various shapes, such as cuboids or cylinders. The first housing 101 can be a hollow structure open on one side, and the second housing 102 can also be a hollow structure open on one side. The open side of the second housing 102 interlocks with the open side of the first housing 101, thus forming a housing 10 with an enclosed space. Alternatively, the first housing 101 can be a hollow structure open on one side, and the second housing 102 can be a plate-like structure, with the second housing 102 interlocked with the open side of the first housing 101, thus forming a housing 10 with an accommodating space.

[0102] In the battery device 100, there can be one or more battery cells 201. If there are multiple battery cells 201, they can be connected in series, in parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 201 are connected in both series and parallel. Alternatively, multiple battery cells 201 can be first connected in series, in parallel, or in a mixed configuration to form a battery module, and then multiple battery modules can be connected in series, in parallel, or in a mixed configuration to form a whole, which is then housed within the housing 10. Another option is that all battery cells 201 can be directly connected in series, in parallel, or in a mixed configuration, and then the whole consisting of all battery cells 201 is housed within the housing 10.

[0103] In some embodiments, the battery device 100 may further include a busbar component, through which multiple battery cells 201 can be electrically connected to each other, enabling series, parallel, or mixed connection of the multiple battery cells 201. The busbar component may be a metallic conductor, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0104] Please refer to Figure 3 , Figure 3 This is an exploded view of a battery cell 201 provided in some embodiments of this application. The battery cell 201 may include a housing 2011 and an electrode assembly 2012, the electrode assembly 2012 being housed within the housing 2011.

[0105] In some embodiments, the housing 2011 may include a housing 20111 and an end cap 20112, the housing 20111 having an opening, and the end cap 20112 closing the opening of the housing 20111. Here, "closing" refers to covering or shutting down, and can be either sealed or unsealed.

[0106] The housing 20111 is a component used to house the electrode assembly 2012. The housing 20111 can be a hollow structure with an opening at one end, or it can be a hollow structure with openings at both opposite ends. The housing 20111 can have various shapes, such as cylindrical or cuboid. The housing 20111 can be made of various materials, such as copper, iron, aluminum, steel, or aluminum alloy. The electrode assembly 2012 can be partially or completely housed within the housing 20111.

[0107] End cap 20112 and housing 20111 together define a receiving space for accommodating electrode assembly 2012 and other components. End cap 20112 can be connected to housing 20111 by welding, roll sealing, or other methods to close the opening of housing 20111. The shape of end cap 20112 can be adapted to the shape of housing 20111. For example, if housing 20111 is a cuboid structure, end cap 20112 can be a rectangular plate structure adapted to housing 20111; or if housing 20111 is a cylindrical structure, end cap 20112 can be a circular plate structure adapted to housing 20111. The material of end cap 20112 can also be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. The materials of end cap 20112 and housing 20111 can be the same or different.

[0108] In an embodiment where the housing 20111 has an opening at one end, one end cap 20112 may be provided. In an embodiment where the housing 20111 has openings at both opposite ends, two end caps 20112 may be provided, with the two end caps 20112 respectively closing the two openings of the housing 20111, and the two end caps 20112 and the housing 20111 together defining the receiving space.

[0109] In some embodiments, the battery cell 201 may further include electrode terminals 2013, which are disposed on the housing 2011 and are used for electrical connection with the tabs of the electrode assembly 2012 to input or output electrical energy of the battery cell 201. The electrode terminals 2013 may be disposed on the housing 20111 of the housing 2011 or on the end cap 20112 of the housing 2011. The electrode terminals 2013 and the tabs may be directly connected, for example, by welding the electrode terminals 2013 to the tabs. The electrode terminals 2013 and the tabs may also be indirectly connected, for example, by connecting the electrode terminals 2013 to the tabs via a current collector. The current collector may be a metallic conductor, such as copper, iron, aluminum, steel, or aluminum alloy.

[0110] As an example, such as Figure 3As shown, one end of the housing 20111 forms an opening, and there is one end cap 20112 in the housing 2011, which closes one opening of the housing 20111. Two electrode terminals 2013 are provided on the end cap 20112, which are a positive electrode terminal and a negative electrode terminal, respectively. The end of the electrode assembly 2012 facing the end cap 20112 has a positive electrode tab and a negative electrode tab. The positive electrode terminal is electrically connected to the positive electrode tab, and the negative electrode terminal is electrically connected to the negative electrode tab.

[0111] Please refer to Figures 4-8 , Figure 4 Exploded view of a battery device 100 provided in some embodiments of this application; Figure 5 This is a structural schematic diagram of the first beam 1 provided in some embodiments of this application; Figure 6 This is an assembly diagram of the battery cell 201 and the thermal management component 30 provided in some embodiments of this application; Figure 7 This is a partial structural schematic diagram of a battery device 100 provided in some embodiments of this application; Figure 8 for Figure 7 A partial enlarged view of region A. This application provides a battery device 100, including a housing 10 and a battery cell assembly 20. The housing 10 includes a first beam 1. The battery cell assembly 20 is housed within the housing 10. Along a first direction X, first beams 1 are provided on both sides of the battery cell assembly 20. The battery cell assembly 20 includes multiple battery cells 201 arranged along the first direction X. Along the first direction X, battery cells 201 adjacent to the first beam 1 directly or indirectly abut against the first beam 1. A thermal management component 30 is disposed between two adjacent battery cells 201 along the first direction X, and the thermal management component 30 has a first flow channel. The first beam 1 has a second flow channel 11, which is connected to the first flow channel 11. The first flow channel and the second flow channel 11 are used to contain a heat exchange medium to manage the temperature of the battery cells 201.

[0112] The housing 10 has a bottom wall that can support the battery cell assembly 20 in the third direction Z.

[0113] The housing 10 can accommodate either a single battery cell assembly 20 or multiple battery cell assemblies 20. In embodiments with multiple battery cell assemblies 20, a battery cell assembly 20 may be provided on only one side of the first beam 1 along the first direction X. Multiple battery cell assemblies 20 can be arranged along the second direction Y or stacked along the third direction Z, with the first direction X, the second direction Y, and the third direction Z being perpendicular to each other. Each battery cell assembly 20 includes multiple battery cells 201, and the number of battery cells 201 in each assembly 20 can be two, three, four, five, six, seven, eight, nine, ten, twenty, thirty, etc. The multiple battery cells 201 in each battery cell assembly 20 are arranged along the first direction X.

[0114] The housing 10 may include multiple outer side walls surrounding the accommodating space. At least one outer side wall may be a first beam 1, or a partition wall may be provided within the accommodating space, which may also be a first beam 1. There may be multiple first beams 1. The first beams 1 and the battery cell assembly 20 are arranged along a first direction X, with multiple battery cells 201 in the battery cell assembly 20 located between adjacent first beams 1. The battery cell assembly 20 may be located on only one side of the first beam 1. In the battery cell assembly, the battery cells located at both ends along the first direction are the battery cells closest to the two first beams. The battery cell 201 closest to the first beam 1 along the first direction X in the battery cell assembly 20 may directly contact the first beam 1, achieving direct abutment between the first beam 1 and the battery cell 201; alternatively, the battery cell 201 closest to the first beam 1 along the first direction X in the battery cell assembly 20 may abut against the first beam 1 through an intermediate component, achieving indirect abutment between the first beam 1 and the battery cell 201, wherein the intermediate component may be thermally conductive adhesive.

[0115] The second flow channel 11 is an internal flow channel of the first beam 1. It can be connected to other components to provide heat exchange medium to the second flow channel 11 through other components, or to guide the heat exchange medium in the second flow channel 11 to other components. The heat exchange medium can be a coolant, such as an aqueous solution of ethylene glycol, deionized water, or a fluorinated dielectric solution.

[0116] In the first beam 1, the heat exchange medium is in contact with the flow channel wall of the second flow channel 11, thereby realizing heat exchange between the first beam 1 and the heat exchange medium. The first beam 1 abuts against the battery cell 201 closest to the first beam 1 along the first direction X, so as to facilitate heat exchange between the first beam 1 and the battery cell 201, thereby realizing temperature management of the battery cell 201.

[0117] The number of thermal management components 30 can be one or more. Along the first direction X, one thermal management component 30 can be disposed between two adjacent battery cells 201, or multiple thermal management components 30 can be disposed between two adjacent battery cells 201. The first thermal management component 30 can be disposed between any two adjacent battery cells 201; or only a portion of the adjacent battery cells 201 can have thermal management components 30 disposed between them. The number of first flow channels in the thermal management component 30 can be one or more. The second flow channel 11 communicates with the first flow channel; either the heat exchange medium in the second flow channel 11 flows into the first flow channel, or the heat exchange medium in the first flow channel flows into the second flow channel 11. The thermal management component 30 can be a liquid cooling plate.

[0118] In an embodiment where there are multiple thermal management components 30 and multiple battery cell assemblies 20 arranged along the second direction Y, the multiple thermal management components 30 and multiple battery cell assemblies 20 are staggered, and at least one battery cell 201 of each battery cell assembly 20 is disposed between two adjacent thermal management components 30 along the first direction X, and the battery cells 201 located between two adjacent thermal management components 30 are arranged along the second direction Y.

[0119] For example, such as Figure 7 and Figure 8 As shown, the battery device 100 includes six battery cell assemblies 20, which are arranged along a second direction Y. The battery cells 201 of each battery cell assembly 20 are arranged along a first direction X. A thermal management component 30 is disposed between any two adjacent battery cells 201 along the first direction X. Along the first direction X, six battery cells 201 arranged along the second direction Y are disposed between two adjacent thermal management components 30. The six battery cells 201 are the battery cells 201 in the six battery cell assemblies 20. The battery cell 201 closest to the first beam 1 in each battery cell assembly 20 abuts against the first beam 1.

[0120] In this embodiment, by providing a thermal management component 30 between two adjacent battery cells 201 along the first direction X, the thermal management component 30 can manage the temperature of the battery cells 201 on both sides along the first direction X. The first beam 1, which is provided with a second flow channel 11, abuts against the battery cells 201, which helps improve the heat exchange efficiency between the first beam 1 and the battery cells 201, facilitating the first beam 1's management of the battery cell 201's temperature. In such a battery device 100, both the thermal management component 30 and the first beam 1 can manage the temperature of the battery cells 201. On the one hand, this reduces the risk of thermal runaway of the battery cells 201 and improves their reliability. On the other hand, it reduces the need for thermal management components 30 between the two first beams 1, saving internal space in the housing 10 and freeing up more space for the battery cells 201, thereby increasing the volumetric energy density of the battery device 100. Therefore, such a battery device 100 balances improving both the reliability and volumetric energy density of the battery device 100.

[0121] In some embodiments, please continue to refer to Figure 7 and Figure 8 The battery device 100 also includes a flow guide pipe 40 and a plurality of thermal management components 30. The plurality of thermal management components 30 are arranged along a first direction X. Along the first direction X, a battery cell 201 is disposed between two adjacent thermal management components 30. The flow guide pipe 40 is housed in the housing 10 and is arranged with the battery cell assembly 20 along a second direction Y. The flow guide pipe 40 has a flow channel 401. The second flow channel 11 of the first beam 1 and the first flow channels of the plurality of thermal management components 30 are all connected to the flow channel 401. The second direction Y is perpendicular to the first direction X.

[0122] The number of guide tubes 40 can be one or more. In an embodiment where there is one guide tube 40, the guide tube 40 is located on one side of the battery cell assembly 20 along the second direction Y, and the second flow channel 11 and the plurality of first flow channels are all connected to the guide channel 401 of the guide tube 40. In an embodiment where there are multiple guide tubes 40, the multiple guide tubes 40 can be located on the same side of the battery cell assembly 20 along the second direction Y, or on both sides of the battery cell assembly 20 along the second direction Y. In an embodiment where there are multiple battery cell assemblies 20, the multiple battery cell assemblies 20 are arranged along the second direction Y, and the guide tubes 40 can be located on the same side of the multiple battery cell assemblies 20 along the second direction Y, or between two adjacent battery cell assemblies 20 along the second direction Y.

[0123] The heat exchange medium can flow through the second flow channel 11 and the first flow channel through the flow guide channel 401; or the flow guide channel 401 can provide the heat exchange medium to the second flow channel 11 and the first flow channel.

[0124] In this embodiment, by setting multiple thermal management components 30, these components can jointly manage the temperature of the battery cells 201 within the housing 10, improving the temperature management effect and reliability of the battery cells 201. The second flow channel 11 of the first beam 1 and the first flow channels of the multiple thermal management components 30 are both connected to the guide channel 401, reducing the difficulty of conducting the heat exchange medium between the second and first flow channels. This results in a more uniform temperature distribution of the battery cells 201 within the housing 10, further improving the reliability of the battery cells 201.

[0125] In some embodiments, please continue to refer to Figure 8 The first beam 1 is provided with a first insertion part 12, which is inserted into the guide pipe 40 to connect the guide channel 401 and the second flow channel 11.

[0126] The first insertion part 12 can be inserted into the guide tube 40 to achieve a plug-in engagement between the first insertion part 12 and the guide tube 40; alternatively, the guide tube 40 can be inserted into the first insertion part 12 to achieve a plug-in engagement between the first insertion part 12 and the guide tube 40. The first insertion part 12 can be a groove provided in the first beam 1, and the first insertion part 12 communicates with the second flow channel 11. The guide tube 40 is inserted into the first insertion part 12 to connect the second flow channel 11 and the guide channel 401. The first insertion part 12 can also be a connector provided in the first beam 1, and the connector is plugged into the guide tube 40 to connect the guide channel 401 and the second flow channel 11.

[0127] In this embodiment, the maintenance and replacement of the guide tube 40 are facilitated, reducing the difficulty and cost of setting up the guide tube 40.

[0128] In some embodiments, please refer to Figure 9 , Figure 9 This is an assembly diagram of the first beam 1, the first insertion portion 12, and the guide tube 40 provided for some embodiments of this application. The first insertion portion 12 protrudes from the surface of the first beam 1 facing the battery cell assembly 20.

[0129] The surface of the first beam 1 facing the battery cell assembly 20 is the second surface 13, and the battery cell 201 closest to the first beam 1 in the battery cell assembly 20 abuts against the second surface 13. A first insertion portion 12 protrudes from the second surface 13. The first insertion portion 12 can be fixedly connected to the first beam 1; for example, the first beam 1 and the first insertion portion 12 can be welded together. Alternatively, the first insertion portion 12 can be detachably connected to the first beam 1; for example, the first beam 1 and the first insertion portion 12 can be threaded together.

[0130] In this embodiment, the flow guide 40 can be inserted into the surface of the first beam 1 facing the battery cell assembly 20, which reduces the difficulty of connecting the flow guide 40 and the first beam 1.

[0131] In some embodiments, the first plug-in portion 12 is detachably connected to the first beam 1.

[0132] The first insertion part 12 can be inserted, screwed, or fastened to the first beam 1; wherein, the fastener can be a bolt.

[0133] In this embodiment, the maintenance difficulty of the first insertion part 12 is reduced, and the service life of the first beam 1 and the guide pipe 40 is increased.

[0134] In some embodiments, please refer to Figure 10 , Figure 10 This is a partial structural schematic diagram of a battery device 100 provided in some embodiments of this application. Along the second direction Y, a guide pipe 40 is provided on both sides of the battery cell assembly 20. The guide pipe 40 located on one side of the battery cell assembly 20 is a liquid inlet pipe, and the guide pipe 40 located on the other side of the battery cell assembly 20 is a liquid outlet pipe.

[0135] Along the second direction Y, there may be only one guide pipe 40 on the same side of the battery cell assembly 20; or there may be multiple guide pipes 40 on the same side of the battery cell assembly 20. The multiple guide pipes 40 on the same side of the battery cell assembly 20 are all liquid inlet pipes, and the multiple guide pipes 40 on the other side of the battery cell assembly 20 are all liquid outlet pipes.

[0136] In this embodiment, the heat exchange medium in one guide pipe 40 can flow into the second flow channel 11 and flow out through another guide pipe 40 after heat exchange with the first beam 1, which reduces the difficulty of replacing the heat exchange medium in the first beam 1 and improves the thermal management performance of the first beam 1 for the battery cell 201.

[0137] In some embodiments, please refer to Figure 11 , Figure 11 This is a schematic diagram of the structure of a battery device 100 provided in some embodiments of this application. Along the second direction Y, a plurality of guide pipes 40 are provided on the same side of the battery cell assembly 20, at least one guide pipe 40 being an inlet pipe and at least one guide pipe 40 being an outlet pipe.

[0138] Along the second direction Y, the number of guide pipes 40 on the same side of the battery cell assembly 20 can be two, three, four, five, six, etc. A portion of the multiple guide pipes 40 are liquid inlet pipes, and another portion are liquid outlet pipes. The heat exchange medium can enter the liquid outlet pipe through the liquid inlet pipe to achieve fluid renewal within the guide pipes 40.

[0139] In this embodiment, by setting multiple flow guides 40 on the same side of the battery cell assembly 20 along the second direction Y, the space occupied by the multiple flow guides 40 along the second direction Y can be reduced, the space utilization of the housing 10 can be improved, and it is beneficial to set more battery cells 201 in the housing 10 to improve the volumetric energy density of the battery device 100.

[0140] In some embodiments, the battery cell 201 includes a housing 2011 along a first direction X, the housing 2011 having a first surface 20113 facing the first beam 1, and at least a portion of the orthographic projection of the second flow channel 11 lies within the orthographic projection of the first surface 20113 of the battery cell 201 closest to the first beam 1 in the battery cell assembly 20.

[0141] The first surface 20113 can be the surface with the largest surface area in the outer shell 2011, or it can be the surface with a smaller surface area in the outer shell 2011.

[0142] The entire orthographic projection of the second flow channel 11 may lie within the orthographic projection of the first surface 20113 of the battery cell 201 closest to the first beam 1 in the battery cell assembly 20; or only a portion of the orthographic projection of the second flow channel 11 may lie within the orthographic projection of the first surface 20113 of the battery cell 201 closest to the first beam 1 in the battery cell assembly 20.

[0143] In this embodiment, the battery cell 201 that abuts against the first beam 1 can be positioned closer to the second flow channel 11, which is beneficial for heat exchange between the heat exchange medium in the second flow channel 11 and the battery cell 201, thereby improving the thermal management performance of the first beam 1 on the battery cell 201.

[0144] In some embodiments, the thermal conductivity of the first beam 1 is greater than or equal to 100 W / (m·K).

[0145] For example, the thermal conductivity of the first beam 1 can be 100W / (m·K), 120W / (m·K), 140W / (m·K), 160W / (m·K), 180W / (m·K), 200W / (m·K), 220W / (m·K), 240W / (m·K), 260W / (m·K), 280W / (m·K), 300W / (m·K), 330W / (m·K), 380W / (m·K), 400W / (m·K), 450W / (m·K), 500W / (m·K), 550W / (m·K), 600W / (m·K), etc.

[0146] In this embodiment, the thermal conductivity of the first beam 1 is greater than or equal to 100 W / (m·K), which can improve the heat exchange efficiency between the heat exchange medium in the second flow channel 11 and the battery cell 201, and improve the thermal management performance of the first beam 1 for the battery cell 201.

[0147] In some embodiments, the material of the first beam 1 includes aluminum alloy, copper alloy, magnesium alloy or steel.

[0148] As part of the housing 10, the first beam 1 needs to have high strength. Furthermore, since the first beam 1 exchanges heat with the battery cell 201, it needs to possess excellent thermal conductivity. Aluminum alloy, copper alloy, magnesium alloy, and steel all have excellent strength and thermal conductivity; therefore, including aluminum alloy, copper alloy, magnesium alloy, or steel in the material of the first beam 1 can improve its performance.

[0149] In this embodiment, the first beam 1 has high strength and strong thermal conductivity, which improves the positional restriction effect of the first beam 1 on the battery cell 201 and improves the thermal management performance of the first beam 1 on the battery cell 201.

[0150] In some embodiments, please refer to Figure 12 , Figure 12 This is a partial structural schematic diagram of the housing 10 provided in some embodiments of this application. The battery device 100 includes two first beams 1, which are spaced apart along a first direction X. A battery cell assembly 20 is disposed between the two first beams 1 along the first direction X. In embodiments where there are multiple battery cell assemblies 20, each battery cell assembly 20 has a first beam 1 disposed on both sides along the first direction X.

[0151] In this embodiment, the battery cells 201 located at both ends of the battery cell assembly 20 can abut against the corresponding first beam 1. On the one hand, this can improve the positional restriction effect of the first beam 1 on the battery cell assembly 20, and on the other hand, it can improve the thermal management performance of the first beam 1 on the battery cells 201.

[0152] In some embodiments, the housing 10 further includes a side beam 5, which is arranged along the second direction Y and extends along the first direction X with the battery cell assembly 20. The side beam 5 connects two first beams 1. The side beam 5 can improve the strength of the two first beams 1 and reduce the risk of damage to the two first beams 1.

[0153] In some embodiments, please refer to Figure 13 , Figure 13This is a partial structural schematic diagram of the housing 10 provided in some embodiments of this application. The battery device 100 also includes a guide pipe 40, which has a guide channel 401 that communicates with a second flow channel 11 of a first beam 1 located on both sides of the battery cell assembly 20 along a first direction X. The housing 10 includes an inlet 6 for the heat exchange medium to flow into the second flow channel 11 and an outlet 7 for the heat exchange medium to discharge from the second flow channel 11. One of the inlet 6 and the outlet 7 is disposed on one of the first beams 1, and the other is disposed on the other first beam 1.

[0154] The liquid inlet 6 is connected to the second flow channel 11 of one first beam 1, and the liquid outlet 7 is connected to the second flow channel 11 of another first beam 1. The first beam 1 with the liquid inlet 6 can receive the heat exchange medium provided by the external equipment. The heat exchange medium enters the second flow channel 11, flows through the guide channel 401 into the second flow channel 11 of another first beam 1, and flows out through the liquid outlet 7.

[0155] In this embodiment, the difficulty of the heat exchange medium flowing into or out of the battery device 100 can be reduced. On the one hand, the first beam 1 can manage the temperature of the battery cell 201, and on the other hand, the difficulty of the heat exchange medium flowing in the guide pipe 40 is reduced.

[0156] In some embodiments, please refer to Figure 14 , Figure 14 This is a partial structural schematic diagram of the housing 10 provided in some embodiments of this application. The battery device 100 also includes a guide pipe 40, which has a guide channel 401 that communicates with a second flow channel 11 of a first beam 1 located on both sides of the battery cell assembly 20 along a first direction X. The housing 10 includes an inlet 6 for the heat exchange medium to flow into the second flow channel 11 and an outlet 7 for the heat exchange medium to discharge from the second flow channel 11. Both the inlet 6 and the outlet 7 are disposed on the same first beam 1.

[0157] The heat exchange medium flows into the first beam 1 through the liquid inlet 6, and after passing through a guide channel 401, a second flow channel 11 of the other first beam 1, and another guide channel 401, it flows into the first beam 1 and flows out from the liquid outlet 7.

[0158] In some embodiments, please refer to Figure 15 , Figure 15 This is a partial structural schematic diagram of a battery device 100 provided in some embodiments of this application. The battery device 100 also includes a control module 50 for electrically controlling the battery cells 201. The housing 10 includes an electrical compartment 2 and a battery compartment 3. The control module 50 is housed in the electrical compartment 2, and the battery cell assembly 20 is housed in the battery compartment 3. The housing 10 has a partition beam 4 that separates the electrical compartment 2 and the battery compartment 3. The side wall of the battery compartment 3 facing away from the electrical compartment 2 along a first direction X, and the partition beam 4, are both first beams 1.

[0159] The control module 50 may include a BMS main control module and a high-voltage power distribution unit. The BMS main control module is used to monitor the status of the individual battery cells 201 in the battery compartment 3 and to provide overvoltage, overcurrent, or overtemperature protection. The high-voltage power distribution unit is electrically connected to the BMS main control module, responds to the BMS main control module, and manages the on / off state of the high-voltage circuit of the battery device 100.

[0160] The housing 10 includes a storage space, and the partition beam 4 divides the storage space into an electrical compartment 2 and a battery compartment 3, which can be arranged along a first direction X.

[0161] The side wall of the battery compartment 3 facing away from the electrical compartment 2 along the first direction X is the first side wall 8, and the surface of the first side wall 8 facing away from the battery compartment 3 is part of the outer surface of the housing 10. The first side wall 8 and the partition beam 4 are both the first beam 1.

[0162] In this embodiment, on the one hand, the first beam 1 can separate the electrical compartment 2 and the battery compartment 3, reducing the risk of mutual interference between the electrical compartment 2 and the battery compartment 3 and improving the structural strength of the battery device 100; on the other hand, the first beam 1 can manage the temperature of the battery cells 201 in the battery compartment 3, reducing the risk of thermal runaway of the battery cells 201 and improving the reliability of the battery device 100. By setting the first sidewall 8 as the first beam 1, and the surface of the first beam 1 facing away from the battery compartment 3 being part of the outer surface of the housing 10, the first beam 1 can directly receive the heat exchange medium provided by external components outside the housing 10, reducing the difficulty of circulating the heat exchange medium in the first beam 1.

[0163] In some embodiments, please continue to refer to Figure 15 The battery cell 201 includes a housing 2011. Along the first direction X, the housing 2011 has a first surface 20113, which is the surface with the largest outer surface area in the housing 2011.

[0164] The outer casing 2011 has a cuboid structure. The length and height of the battery cell 201 are both greater than its thickness. The length of the battery cell 201 extends along the second direction Y, the height of the battery cell 201 extends along the third direction Z, and the thickness of the battery cell 201 extends along the first direction X. The surface of the battery cell 201 perpendicular to its thickness is the first surface 20113. The battery cell 201 closest to the first beam 1 has two first surfaces 20113, and the surface of the two first surfaces 20113 facing the second surface 13 abuts against the first beam 1.

[0165] In this embodiment, the contact area between the battery cell 201 and the first beam 1 can be increased, thereby improving the thermal management performance of the first beam 1 on the battery cell 201.

[0166] This application provides an electrical device, including the battery device 100 provided in any of the above embodiments.

[0167] Please continue to refer to Figure 5 , Figure 9 , Figure 10 , Figure 12 , Figure 13 and Figure 15 This application provides a battery device 100, comprising a housing 10, battery cell assemblies 20, a flow guide pipe 40, and multiple thermal management components 30. The housing 10 includes two first beams 1 spaced apart along a first direction X. The housing 10 also includes an electrical compartment 2 and a battery compartment 3, arranged along the first direction X. One first beam 1 separates the electrical compartment 2 and the battery compartment 3, and the other first beam 1 is the beam wall of the side of the battery compartment 3 facing away from the electrical compartment 2. Multiple battery cell assemblies 20 are housed within the battery compartment 3 and arranged along the first direction X with the first beams 1. The multiple battery cell assemblies 20 are also arranged along a second direction Y. Each battery cell assembly 20 includes multiple battery cells 201 arranged along the first direction X. Along the first direction X, the battery cell 201 closest to the first beam 1 abuts against the first beam 1. The first beam 1 is provided with a second flow channel 11. Along the first direction X, a thermal management component 30 is disposed between two adjacent battery cells 201. The thermal management component 30 has a first flow channel, and a second flow channel 11 communicates with the first flow channel. The second flow channel 11 and the first flow channel are used to contain heat exchange medium to manage the temperature of the battery cell 201. Multiple thermal management components 30 are arranged along the first direction X. A flow guide pipe 40 is housed in the housing 10 and arranged with the battery cell assembly 20 along the second direction Y. The flow guide pipe 40 has a flow channel 401. The second flow channel 11 of the first beam 1 and the first flow channels of the multiple thermal management components 30 are all connected to the flow channel 401. The second direction Y is perpendicular to the first direction X. The first beam 1 is provided with a first insertion part 12, which is inserted into the flow guide pipe 40 to connect the flow channel 401 and the second flow channel 11. The first insertion part 12 is detachably connected to the first beam 1.

[0168] In this battery device 100, the first beam 1, equipped with a second flow channel 11, abuts against the battery cell 201, which improves the heat exchange efficiency between the first beam 1 and the battery cell 201, facilitates the management of the temperature of the battery cell 201 by the first beam 1, reduces the risk of thermal runaway of the battery cell 201, and improves the reliability of the battery device 100. By managing the temperature of the battery cell 201 through the first beam 1, the number of components for managing the temperature of the battery cell 201 within the housing 10 is reduced, saving internal space in the housing 10. This allows for the installation of more battery cells 201 within the housing 10, which is beneficial for improving the volumetric energy density of the battery device 100. Therefore, this battery device 100 balances improving both the reliability and the volumetric energy density of the battery device 100. Both the thermal management component 30 and the first beam 1 can manage the temperature of the battery cell 201. On the one hand, this reduces the risk of thermal runaway of the battery cell 201 and improves its reliability. On the other hand, it reduces the number of thermal management components 30 between the battery cell 201 and the first beam 1, saving internal space in the housing 10 to accommodate more battery cells 201 and increasing the volumetric energy density of the battery device 100. The first beam 1 can separate the electrical compartment 2 and the battery compartment 3, reducing the risk of interference between them and improving the structural strength of the battery device 100. The first beam 1 can also manage the temperature of the battery cells 201 within the battery compartment 3, reducing the risk of thermal runaway of the battery cells 201 and improving the reliability of the battery device 100.

[0169] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0170] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, include: The box girder includes the first beam; A battery cell assembly is housed within the housing. Along a first direction, the first beam is provided on both sides of the battery cell assembly. The battery cell assembly includes a plurality of battery cells arranged along the first direction. Along the first direction, the battery cells adjacent to the first beam directly or indirectly abut against the first beam. A thermal management component is disposed between two adjacent battery cells along the first direction, and the thermal management component is provided with a first flow channel; The first beam is provided with a second flow channel, and the first flow channel and the second flow channel are connected. The first flow channel and the second flow channel are used to contain heat exchange medium to manage the temperature of the battery cell.

2. The battery device as claimed in claim 1, characterized in that, The battery device further includes a flow guide tube and a plurality of thermal management components. The plurality of thermal management components are arranged along the first direction. Along the first direction, a battery cell is disposed between two adjacent thermal management components. The flow guide tube is housed in the housing and arranged along the second direction with the battery cell assembly. The flow guide tube has a flow channel. The second flow channel of the first beam and the first flow channel of the plurality of thermal management components are all connected to the flow channel. The second direction is perpendicular to the first direction.

3. The battery device as claimed in claim 2, characterized in that, The first beam is provided with a first insertion part, which is inserted and engaged with the guide pipe to connect the guide channel and the second flow channel.

4. The battery device as claimed in claim 3, characterized in that, The first insertion portion protrudes from the surface of the first beam facing the battery cell assembly.

5. The battery device as claimed in claim 4, characterized in that, The first insertion part is detachably connected to the first beam.

6. The battery device as claimed in claim 2, characterized in that, Along the second direction, the guide pipes are provided on both sides of the battery cell assembly. The guide pipe on one side of the battery cell assembly is a liquid inlet pipe, and the guide pipe on the other side of the battery cell assembly is a liquid outlet pipe.

7. The battery device as claimed in claim 2, characterized in that, Along the second direction, a plurality of the flow guides are provided on the same side of the battery cell assembly, at least one of the flow guides being a liquid inlet pipe and at least one of the flow guides being a liquid outlet pipe.

8. The battery device according to any one of claims 1-7, characterized in that, The battery cell includes a housing along the first direction, the housing having a first surface facing the first beam, and at least a portion of the orthographic projection of the second flow channel lies within the orthographic projection of the first surface of the battery cell closest to the first beam in the battery cell assembly.

9. The battery device according to any one of claims 1-7, characterized in that, The thermal conductivity of the first beam is greater than or equal to 100 W / (m·K).

10. The battery device according to any one of claims 1-7, characterized in that, The material of the first beam may include aluminum alloy, copper alloy, magnesium alloy or steel.

11. The battery device according to any one of claims 1-7, characterized in that, The battery device further includes a flow guide tube having a flow channel that communicates with a second flow channel of the first beam located on both sides of the battery cell assembly along the first direction. The housing includes an inlet for the heat exchange medium to flow into the second channel and an outlet for the heat exchange medium to discharge out of the second channel; Wherein, one of the liquid inlet and the liquid outlet is disposed on one of the first beams, and the other is disposed on another of the first beams; or the liquid inlet and the liquid outlet are both disposed on the same first beam.

12. The battery device according to any one of claims 1-7, characterized in that, The battery device also includes a control module, which is used for electrical control of individual battery cells; The enclosure includes an electrical compartment and a battery compartment. The control module is housed in the electrical compartment, and the battery cell assembly is housed in the battery compartment. The enclosure has a partition beam that separates the electrical compartment and the battery compartment. The side wall of the battery compartment away from the electrical compartment along the first direction and the partition beam are both the first beam.

13. The battery device according to any one of claims 1-7, characterized in that, The battery cell includes a casing, and along the first direction, the casing has a first surface, which is the surface with the largest outer surface area in the casing.

14. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-13.

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