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 heat management part, a first pipeline and a first heat insulation part, the battery monomers are accommodated in the box body; the heat management component is contained in the box body and comprises a flow channel, and the flow channel is configured to contain a fluid medium so as to manage the temperature of the battery monomers. The first pipeline is contained in the box body and communicates with the flow channel. The first heat insulation piece wraps at least one part of the outer surface of the first pipeline, and the bending modulus of the first heat insulation piece is 20-500 MPa. According to the battery device, the rigidity and shape stability of the first heat insulation part and the flexibility and elasticity of the first heat insulation part can be both improved, the heat insulation effect of the first heat insulation part on the first pipeline is improved, the temperature of a fluid medium in the first pipeline is stable, and the temperature control effect of the heat management part on the battery monomers is improved; the risk of temperature imbalance of the battery monomers is reduced, and the reliability of the battery device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and more particularly, to a battery device and an electrical device. Background Art

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

[0003] Battery devices are widely used in fields such as portable electronic devices, electric transportation vehicles, electric tools, drones, energy storage devices, etc. A battery device includes battery cells. In battery technology, in addition to considering the use performance of the battery device, the reliability of the battery device is also an issue that cannot be ignored. Based on this, how to improve the reliability of the battery device is an urgent problem to be solved. Summary of the Utility Model

[0004] Embodiments of the present application provide a battery device and an electrical device, which can improve the reliability of the battery device.

[0005] In a first aspect, an embodiment of the present application provides a battery device, including a box body, battery cells, a thermal management component, a first pipeline, and a first heat insulation member; the battery cells are accommodated in the box body; the thermal management component is accommodated in the box body, and the thermal management component includes a flow channel configured to accommodate a fluid medium to manage the temperature of the battery cells; the first pipeline is accommodated in the box body, and the first pipeline is communicated with the flow channel; the first heat insulation member covers at least a part of the outer surface of the first pipeline, and the flexural modulus of the first heat insulation member is 20 MPa - 500 MPa.

[0006] In the above technical solution, by providing that the first pipe is in communication with the flow channel, the first pipe can exchange fluid media with the flow channel. When the flexural modulus of the first heat insulation member is greater than or equal to 20 MPa, the stiffness and shape stability of the first heat insulation member can be improved, so that after the first heat insulation member and the first pipe are assembled, the first heat insulation member can better maintain its shape and fit closely with the first pipe, thereby improving the heat insulation effect, and the appropriate stiffness is also beneficial to the positioning and fixing of the first heat insulation member during the assembly process; when the flexural modulus of the first heat insulation member is less than or equal to 500 MPa, the flexibility and elasticity of the first heat insulation member can be improved, the processing difficulty can be reduced, and it can more easily adapt to the shape of the first pipe through plastic deformation, which not only improves the convenience of assembly, but also reduces the processing cost; thus, by providing that the first heat insulation member covers at least a part of the outer surface of the first pipe, and when the flexural modulus of the first heat insulation member is 20 MPa - 500 MPa, it is possible to take into account improving the stiffness and shape stability of the first heat insulation member and improving the flexibility and elasticity of the first heat insulation member, improving the heat insulation effect of the first heat insulation member and reducing the processing difficulty of the first heat insulation member, thereby improving the heat insulation effect of the first heat insulation member on the first pipe, making the temperature of the fluid medium in the first pipe stable, improving the temperature control effect of the thermal management component on the battery cell, reducing the risk of temperature imbalance of the battery cell, and improving the reliability of the battery device.

[0007] In some embodiments, the flexural modulus of the first heat insulation member is 100 MPa - 400 MPa. When the flexural modulus of the first heat insulation member is greater than or equal to 100 MPa, the stiffness and shape stability of the first heat insulation member can be further improved, so that after the first heat insulation member and the first pipe are assembled, the first heat insulation member can better maintain its shape and fit closely with the first pipe, thereby improving the heat insulation effect; when the flexural modulus of the first heat insulation member is less than or equal to 400 MPa, the flexibility and elasticity of the first heat insulation member can be further improved, the processing difficulty can be reduced, and it can more easily adapt to the shape of the first pipe through plastic deformation, which not only improves the convenience of assembly, but also reduces the processing cost; therefore, when the flexural modulus of the first heat insulation member is 100 MPa - 400 MPa, it is possible to further take into account improving the stiffness and shape stability of the first heat insulation member and improving the flexibility and elasticity of the first heat insulation member, improving the heat insulation effect of the first heat insulation member and saving the processing cost.

[0008] In some embodiments, the first heat insulation member includes a core material and a barrier layer, the barrier layer has an enclosed space, and the core material is accommodated in the enclosed space. By accommodating the core material in the enclosed space of the barrier layer, on the one hand, the strength of the first heat insulation member can be enhanced, the plastic deformation difficulty of the first heat insulation member can be reduced, and the processing cost can be saved; on the other hand, the heat insulation performance of the first heat insulation member can be enhanced, and the heat insulation ability of the first heat insulation member for the first pipe can be improved.

[0009] In some embodiments, the core material is fumed silica, polyurethane foam, polystyrene foam, or polyethylene foam. By using a core material with a relatively large flexural modulus, the overall flexural modulus of the first heat insulation member can be improved. The core material is accommodated in the enclosed space, and the enclosed space can restrict the position of the core material.

[0010] In some embodiments, the barrier layer is an aluminum foil or a polymer film. Manufacturing the barrier layer with an aluminum foil or a polymer film can improve the sealing performance of the barrier layer and enhance the coating effect of the barrier layer on the core material.

[0011] In some embodiments, the first heat insulation member is a vacuum insulation panel. In this way, the first heat insulation member has excellent heat insulation performance, which is beneficial to attaching the first heat insulation member to the first pipeline and facilitating the installation of the first heat insulation member.

[0012] In some embodiments, the first pipeline includes a connected first pipe body and a second pipe body. The outer diameter of the first pipe body is larger than that of the second pipe body. The first heat insulation member covers at least a part of the outer surface of the first pipe body and at least a part of the outer surface of the second pipe body. In this way, the first heat insulation member can be attached to the outer surface of the first pipe body and also to the outer surface of the second pipe body. The first heat insulation member is convenient to install and improves the heat insulation effect of the first heat insulation member on the first pipe body and the second pipe body.

[0013] In some embodiments, the battery device further includes a fixing member for fixing the first pipeline. The fixing member is connected to the box body, and the first heat insulation member wraps at least a part of the fixing member. By providing the fixing member, the fixing member can fix the position of the first pipeline. The first heat insulation member wraps at least a part of the fixing member so that the first heat insulation member can improve the heat insulation effect on the fixing member. On the other hand, the first heat insulation member wraps the fixing member, which is beneficial to the first heat insulation member wrapping the first pipelines on both sides of the fixing member, reduces the installation difficulty of the first heat insulation member, and improves the heat insulation performance of the first heat insulation member on the first pipeline.

[0014] In some embodiments, the fixing member includes a main body portion and a connecting portion. The main body portion surrounds the first pipeline, and the connecting portion is connected to the main body portion. The first heat insulation member covers the outer surface of the main body portion, and the first heat insulation member is provided with an avoidance portion. The connecting portion passes through the avoidance portion and is connected to the box body. By providing the avoidance portion to avoid the installation of the connecting portion, the setting difficulty of the first heat insulation member is reduced, and it is also beneficial for the first heat insulation member to fit more on the surface of the first pipeline, improving the heat insulation performance of the first heat insulation member on the first pipeline.

[0015] In a second aspect, an electrical device provided by an embodiment of the present application includes the battery device provided by any one of the embodiments in the first aspect.

[0016] In some embodiments, the electrical device further includes a second pipeline and a second heat insulation member. The second pipeline is located outside the box body, is connected to the box body, and communicates with the first pipeline. The second heat insulation member covers at least a part of the outer surface of the second pipeline, and the flexural modulus of the second heat insulation member is 20 MPa - 500 MPa. When the flexural modulus of the second heat insulation member is greater than or equal to 20 MPa, the stiffness and shape stability of the second heat insulation member can be improved, so that after the second heat insulation member and the second pipeline are assembled, the second heat insulation member can better maintain its shape and fit closely with the second pipeline, thereby improving the heat insulation effect, and the appropriate stiffness is also beneficial to the positioning and fixing of the second heat insulation member during the assembly process; when the flexural modulus of the second heat insulation member is less than or equal to 500 MPa, the flexibility and elasticity of the second heat insulation member can be improved, the processing difficulty can be reduced, and it is easier to adapt to the shape of the second pipeline through plastic deformation, which not only improves the convenience of assembly, but also reduces the processing cost; therefore, when the flexural modulus of the second heat insulation member is 20 MPa - 500 MPa, it is possible to balance the improvement of the stiffness and shape stability of the second heat insulation member and the improvement of the flexibility and elasticity of the second heat insulation member, improve the heat insulation effect of the second heat insulation member and reduce the processing difficulty of the second heat insulation member, thereby improving the heat insulation effect of the second heat insulation member on the second pipeline, making the temperature of the fluid medium in the second pipeline stable, improving the temperature control effect of the thermal management component on the battery cell, reducing the risk of temperature imbalance of the battery cell, and improving the reliability of the battery device.

[0017] An embodiment of the present application provides an electrical device, including a battery device, a first pipeline, and a first heat insulation member; the battery device includes a box body; the first pipeline is located outside the box body and is connected to the box body; the first heat insulation member covers at least a part of the outer surface of the first pipeline, and the flexural modulus of the first heat insulation member is 20 MPa - 500 MPa. When the flexural modulus of the first heat insulation member is greater than or equal to 20 MPa, the stiffness and shape stability of the first heat insulation member can be improved, so that after the first heat insulation member and the first pipeline are assembled, the first heat insulation member can better maintain its shape and fit tightly with the first pipeline, thereby improving the heat insulation effect, and the appropriate stiffness is also beneficial to the positioning and fixing of the first heat insulation member during the assembly process; when the flexural modulus of the first heat insulation member is less than or equal to 500 MPa, the flexibility and elasticity of the first heat insulation member can be improved, the processing difficulty can be reduced, and it is easier to adapt to the shape of the first pipeline through plastic deformation, which not only improves the assembly convenience but also reduces the processing cost; thus, by setting the first heat insulation member to cover at least a part of the outer surface of the first pipeline, and when the flexural modulus of the first heat insulation member is 20 MPa - 500 MPa, it is possible to balance the improvement of the stiffness and shape stability of the first heat insulation member and the improvement of the flexibility and elasticity of the first heat insulation member, improve the heat insulation effect of the first heat insulation member and reduce the processing difficulty of the first heat insulation member, thereby enhancing the heat insulation effect of the first heat insulation member on the first pipeline, reducing the heat loss of the first pipeline located outside the box body, making the temperature of the fluid medium in the first pipeline stable, enhancing the temperature control effect of the thermal management component on the battery cell, reducing the risk of temperature imbalance of the battery cell, and improving the reliability of the battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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 some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0019] Figure 1 Structural schematic diagram of a vehicle provided by some embodiments of the present application;

[0020] Figure 2 Exploded view of a battery device provided by some embodiments of the present application;

[0021] Figure 3 Exploded view of a battery cell provided by some embodiments of the present application;

[0022] Figure 4 Exploded view of a battery device provided by some other embodiments of the present application;

[0023] Figure 5Schematic structural diagram of a battery device provided by some embodiments of the present application;

[0024] Figure 6 Assembly drawing of a first pipeline and a first heat insulation member provided by some embodiments of the present application;

[0025] Figure 7 Assembly drawing of a first pipeline and a first heat insulation member provided by some other embodiments of the present application;

[0026] Figure 8 is Figure 7 A - A cross-sectional view of;

[0027] Figure 9 is Figure 7 B - B cross-sectional view of;

[0028] Figure 10 Schematic structural diagram of an electrical device provided by some embodiments of the present application.

[0029] Icons: 1 - housing; 11 - shell; 12 - end cap; 2 - electrode assembly; 3 - electrode terminal; 10 - battery cell;

[0030] 20 - box body; 201 - first box body; 202 - second box body;

[0031] 30 - thermal management component; 301 - flow channel;

[0032] 40 - first pipeline; 41 - first pipe body; 411 - step surface; 42 - second pipe body;

[0033] 50 - first heat insulation member; 51 - core material; 52 - barrier layer; 521 - enclosed space;

[0034] 60 - fixing member; 601 - main body part; 602 - connecting part;

[0035] 100 - battery device; 200 - controller; 300 - motor; 4001 - second pipeline; 4002 - second heat insulation member; 1000 - vehicle. Detailed implementation manners

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; 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" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects and not to describe a specific order or primary-secondary relationship.

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

[0039] The term "and / or" in this application is merely 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 simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.

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

[0041] The term "a plurality of" as used in this application means two or more (including two).

[0042] In the embodiments of this application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging to continue use.

[0043] The battery cell includes but is 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.

[0044] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of the battery cell, active ions (such as lithium ions) intercalate and deintercalate between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can reduce the risk of short circuit between the positive and negative electrodes and at the same time allow active ions to pass through.

[0045] In some embodiments, the positive electrode may be a positive electrode tab, and the positive electrode tab 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 opposite to each other in its own thickness direction, and the positive electrode active material is disposed on any one or both of the two opposite 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, or titanium, etc. may be used. The composite current collector may include a polymer material substrate layer and a metal layer. The composite current collector may be formed by forming a metal material (such as 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 conventional materials that can be used as the positive electrode active material of the battery monomer may also be used. These positive electrode active materials may be used alone or in combination of two or more. Among them, examples of the lithium-containing phosphates may include, but are not limited to, lithium iron phosphate (such as LiFePO4 (which may also be abbreviated 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 manganese iron phosphate, and a composite material of lithium manganese iron phosphate and carbon. Examples of the 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 (which may also be abbreviated as NCM 333 ), LiNi 0.5 Co 0.2 Mn 0.3 O2 (which may also be abbreviated as NCM 523 ), LiNi 0.5 Co 0.25 Mn 0.25 O2 (which may also be abbreviated as NCM 211 ), LiNi 0.6 Co 0.2 Mn0.2 O2 (which can also be abbreviated as NCM 622 ), LiNi 0.8 Co 0.1 Mn 0.1 O2 (which can also be abbreviated as NCM 811 ), lithium nickel cobalt aluminum oxide (such as LiNi 0.85 Co 0.15 Al 0.05 O2) and at least one of its modified compounds, etc.

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

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

[0051] As an example, the negative electrode current collector can employ a metal foil, foam metal, or 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, or titanium, etc. can be used. The foam 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 (such as 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 plate can include a negative electrode current collector and a negative electrode active material provided on at least one surface of the negative electrode current collector.

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

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

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

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

[0057] As an example, the material of the separator membrane can include at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, and polyvinylidene fluoride. The separator membrane can be a single-layer film or a multi-layer composite film. When the separator membrane is a multi-layer composite film, the materials of each layer can be the same or different. The separator can be a single component located between the positive and negative electrodes or attached to the surfaces of the positive and negative electrodes.

[0058] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive electrode and the negative electrode and simultaneously functions to transport ions and isolate the positive and negative electrodes.

[0059] In some embodiments, the battery cell further includes an electrolyte, and the electrolyte functions to conduct ions between the positive and negative electrodes. The electrolyte can be liquid, gel, or solid. Among them, the liquid electrolyte includes electrolyte salts and solvents.

[0060] In some embodiments, the electrolyte salts can 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 difluoro(oxalato)borate, lithium bis(oxalato)borate, lithium difluoro bis(oxalato)phosphate, and lithium tetrafluoro(oxalato)phosphate.

[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, sulfolane, 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 polymer as the skeleton network of the electrolyte, combined with an ionic liquid-lithium salt.

[0063] Among them, the solid electrolyte includes a polymer solid electrolyte, an inorganic solid electrolyte, and a composite solid electrolyte.

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

[0065] As an example, the inorganic solid electrolyte may include an oxide solid electrolyte (crystalline perovskite, sodium superionic conductor, garnet, amorphous LiPON film), a sulfide solid electrolyte (crystalline lithium superionic conductor (lithium germanium phosphorus sulfur, argyrodite), 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 the polymer solid electrolyte.

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

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

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

[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 folded segments arranged in a laminated manner, and a positive electrode sheet is clamped 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 folded segments arranged in a laminated manner.

[0072] As an example, a plurality of separator members may be provided, and are respectively provided between any adjacent positive electrode plates or negative electrode plates.

[0073] As an example, the separator members may be continuously provided, and are provided between any adjacent positive electrode plates or negative electrode plates by means of folding or winding.

[0074] In some embodiments, the shape of the electrode assembly may be cylindrical, flat, prismatic, or the like.

[0075] In some embodiments, the electrode assembly is provided with tabs, and the tabs can conduct 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 shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum plastic film, etc.

[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 multi-prismatic battery cell, and the multi-prismatic battery cell is, for example, a hexagonal-prismatic battery cell, etc.

[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, parallel, or in a series-parallel combination through a current collecting component.

[0079] In some embodiments, the 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, the battery module may be formed by bundling a plurality of battery cells with a cable tie.

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

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

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

[0084] As an example, the box body may include a first box body and a second box body. The first box body and the second box body are buckled together so that a closed space is formed inside the box body to accommodate the battery cell assembly. The "closed" here means covering or closing, which can be sealed or unsealed. The first box body 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 part of the chassis structure of a vehicle. For example, the top cover of the box body can become at least part of the floor of the vehicle, or the frame of the box body can become at least part of the cross beam and longitudinal beam of the vehicle.

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

[0088] The battery device may include a box body and battery cells, and the battery cells are accommodated in the box body. During the use of the battery device, the temperature of the battery cells affects the use performance of the battery device. In order to manage the temperature of the battery cells in the box body, a thermal management component can be provided in the box body. The thermal management component can be a water-cooled plate. By introducing a fluid medium at a certain temperature into the thermal management component, the temperature adjustment of the thermal management component is realized, so as to manage the temperature of the battery cells during the heat exchange process between the battery cells and the thermal management component. Therefore, controlling the temperature of the fluid medium in the thermal management component is extremely important for the temperature management of the battery cells.

[0089] The thermal management component is usually connected to an external fluid supply device through a pipeline. The fluid supply device can be a water-cooling unit. The fluid supply device introduces a fluid medium at a certain temperature into the thermal management component through the pipeline, and then the thermal management component introduces it into the fluid supply device through the pipeline. However, when the fluid medium flows in the pipeline, the pipeline is prone to heat exchange with the outside world, and the heat insulation effect of the pipeline is poor, reducing the temperature control effect of the thermal management component on the battery cells.

[0090] Foam can be provided on the outer surface of the pipeline, and the foam can reduce the interference of the outside world on the temperature of the pipeline. However, the installation environment of the pipeline is complex. For example, the pipeline needs to be connected to a fixing part to fix the position of the pipeline, and the position where the fixing part of the pipeline is provided is not convenient for the installation of the foam, and the pipeline exposed outside reduces the heat insulation effect of the pipeline; again, the sizes of the pipelines are different, making it difficult for the foam to fit on the outer surface of the pipeline, and the fitting effect is poor, reducing the heat insulation effect of the pipeline. In this way, the pipeline still has the problem of poor heat insulation effect, increasing the risk of thermal runaway due to temperature imbalance of the battery cells and reducing the reliability of the battery device.

[0091] In view of this, in order to improve the temperature control effect of the thermal management component, an embodiment of the present application provides a battery device, which includes a box body, battery cells, a thermal management component, a first pipeline, and a first heat insulation member. The battery cells are accommodated in the box body. The thermal management component includes a flow channel, and the flow channel is configured to accommodate a fluid medium to manage the temperature of the battery cells. The first pipeline is accommodated in the box body, and the first pipeline is communicated with the flow channel. The first heat insulation member covers at least a part of the outer surface of the first pipeline, and the flexural modulus of the first heat insulation member is 20 MPa - 500 MPa.

[0092] In such a battery device, by providing that the first pipeline is communicated with the flow channel, the first pipeline can exchange the fluid medium with the flow channel. When the flexural modulus of the first heat insulation member is greater than or equal to 20 MPa, the stiffness and shape stability of the first heat insulation member can be improved, so that after the first heat insulation member and the first pipeline are assembled, the first heat insulation member can better maintain its shape and fit tightly with the first pipeline, thereby improving the heat insulation effect, and the appropriate stiffness is also beneficial to the positioning and fixing of the first heat insulation member during the assembly process; when the flexural modulus of the first heat insulation member is less than or equal to 500 MPa, the flexibility and elasticity of the first heat insulation member can be improved, the processing difficulty can be reduced, and it is easier to adapt to the shape of the first pipeline through plastic deformation, which not only improves the assembly convenience but also reduces the processing cost; in this way, by providing that the first heat insulation member covers at least a part of the outer surface of the first pipeline and when the flexural modulus of the first heat insulation member is 20 MPa - 500 MPa, it is possible to take into account improving the stiffness and shape stability of the first heat insulation member and improving the flexibility and elasticity of the first heat insulation member, improve the heat insulation effect of the first heat insulation member and reduce the processing difficulty of the first heat insulation member, thereby improving the heat insulation effect of the first heat insulation member on the first pipeline, making the temperature of the fluid medium in the first pipeline stable, improving the temperature control effect of the thermal management component on the battery cells, reducing the risk of temperature imbalance of the battery cells, and improving the reliability of the battery device.

[0093] 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, battery cars, electric toys, electric tools, vehicles, ships, and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0094] For the convenience of description, the following embodiments take the electrical device as a vehicle as an example for illustration.

[0095] Please refer to Figure 1 , Figure 1Schematic diagram of the structure of vehicle 1000 provided by some embodiments of the present application. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can serve as the operating power source of the vehicle 1000.

[0096] The vehicle 1000 may further 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, it is used for the working power requirements during the start, navigation and driving of the vehicle 1000.

[0097] In some embodiments of the present application, the battery device 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0098] Please refer to Figure 2 , Figure 2 Explosion diagram of the battery device 100 provided by some embodiments of the present application. The battery device 100 may include a box body 20 and battery cells 10. The box body 20 is used to accommodate the battery cells 10.

[0099] Among them, a closed space for accommodating the battery cells 10 is formed inside the box body 20. The box body 20 can adopt various structures. In some embodiments, the box body 20 may include a first box body 201 and a second box body 202, and the first box body 201 and the second box body 202 are buckled with each other. The first box body 201 and the second box body 202 can be of various shapes, such as a cuboid, a cylinder, etc. The first box body 201 can be a hollow structure with one side open, and the second box body 202 can also be a hollow structure with one side open. The open side of the second box body 202 and the open side of the first box body 201 are buckled with each other, then the box body 20 with a closed space is formed. It can also be that the first box body 201 is a hollow structure with one side open, and the second box body 202 is a plate-like structure. The second box body 202 is buckled to the open side of the first box body 201, then the box body 20 with an accommodating space is formed.

[0100] In the battery device 100, the battery cells 10 can be one or multiple. If there are multiple battery cells 10, the multiple battery cells 10 can be connected in series, parallel or in a hybrid connection. A hybrid connection means that there are both series and parallel connections among the multiple battery cells 10. It can be that multiple battery cells 10 are first connected in series, parallel or in a hybrid connection to form a battery module, and then multiple battery modules are connected in series, parallel or in a hybrid connection to form a whole and are accommodated in the box body 20. It can also be that all the battery cells 10 are directly connected in series, parallel or in a hybrid connection together, and then the whole formed by all the battery cells 10 is accommodated in the box body 20.

[0101] In some embodiments, the battery device 100 may further include a busbar component (not shown in the figure). The plurality of battery cells 10 can be electrically connected through the busbar component to achieve series connection, parallel connection, or hybrid connection of the plurality of battery cells 10. The busbar component can be a metal conductor, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0102] Please refer to Figure 3 , Figure 3 is an exploded view of the 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, and the electrode assembly 2 is accommodated in the housing 1.

[0103] In some embodiments, the housing 1 may include a housing body 11 and an end cap 12. The housing body 11 has an opening, and the end cap 12 closes the opening of the housing body 11. Here, "closing" means covering or closing, which can be sealed or non-sealed.

[0104] The housing body 11 is a component for accommodating the electrode assembly 2. The housing body 11 can be a hollow structure with an opening formed at one end, or a hollow structure with openings formed at opposite ends. The housing body 11 can be in various shapes, such as cylindrical, cuboid, etc. The material of the housing body 11 can be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. The electrode assembly 2 can be partially located in the housing body 11 or entirely located in the housing body 11.

[0105] The end cap 12 and the housing body 11 together define a receiving space for accommodating the electrode assembly 2 and other components. The end cap 12 can be connected to the housing body 11 by welding, rolling sealing, etc. to close the opening of the housing body 11. The shape of the end cap 12 can be adapted to the shape of the housing body 11. For example, when the housing body 11 is a cuboid structure, the end cap 12 is a rectangular plate-like structure adapted to the housing body 11. Another example is that when the housing body 11 is a cylindrical structure, the end cap 12 is a circular plate-like structure adapted to the housing body 11. The material of the end cap 12 can also be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cap 12 and the housing body 11 can be the same or different.

[0106] In the embodiment where the housing body 11 has an opening formed at one end, one end cap 12 can be correspondingly provided. In the embodiment where the housing body 11 has openings formed at opposite ends, two end caps 12 can be correspondingly provided. The two end caps 12 respectively close the two openings of the housing body 11, and the two end caps 12 and the housing body 11 together define the receiving space.

[0107] In some embodiments, the battery cell 10 may further include an electrode terminal 3. The electrode terminal 3 is disposed on the housing 1 and is used for electrically connecting with the tab of the electrode assembly 2 to input or output the electric energy of the battery cell 10. The electrode terminal 3 may be disposed on the housing body 11 of the housing 1 or on the end cover 12 of the housing 1. The electrode terminal 3 and the tab may be directly connected. For example, the electrode terminal 3 and the tab are welded. The electrode terminal 3 and the tab may also be indirectly connected. For example, the electrode terminal 3 and the tab are indirectly connected through a current collecting member. The current collecting member may be a metal conductor, such as copper, iron, aluminum, steel, aluminum alloy, etc.

[0108] As an example, such as Figure 3 , an opening is formed at one end of the housing body 11, and there is one end cover 12 in the housing 1. One end cover 12 closes one opening of the housing body 11. Two electrode terminals 3 are disposed on the end cover 12. The two electrode terminals 3 are a positive electrode terminal and a negative electrode terminal respectively. A positive tab and a negative tab are formed at one end of the electrode assembly 2 facing the end cover 12. The positive electrode terminal is electrically connected with the positive tab, and the negative electrode terminal is electrically connected with the negative tab.

[0109] Please refer to Figures 4 - 6 , Figure 4 is an exploded view of a battery device 100 provided in some other embodiments of the present application; Figure 5 is a schematic structural view of a battery device 100 provided in some embodiments of the present application; Figure 6 is an assembly view of a first pipeline 40 and a first heat insulation member 50 provided in some embodiments of the present application. An embodiment of the present application provides a battery device 100, which includes a box body 20, a battery cell 10, a thermal management component 30, a first pipeline 40 and a first heat insulation member 50. The battery cell 10 is accommodated in the box body 20. The thermal management component 30 is accommodated in the box body 20. The thermal management component 30 includes a flow channel 301, and the flow channel 301 is configured to accommodate a fluid medium to manage the temperature of the battery cell 10. The first pipeline 40 is accommodated in the box body 20, and the first pipeline 40 is communicated with the flow channel 301. The first heat insulation member 50 covers at least a part of the outer surface of the first pipeline 40, and the flexural modulus of the first heat insulation member 50 is 20 MPa - 500 MPa.

[0110] The number of the battery cells 10 may be one or multiple.

[0111] It may be that the thermal management component 30 is disposed only on one side of the battery cell 10; or it may be that the thermal management component 30 is disposed on both sides of the battery cell 10. In the embodiments where the number of the battery cells 10 is multiple, it may be that the thermal management component 30 is disposed on both sides of the multiple battery cells 10; or it may be that the thermal management component 30 is disposed on both sides of each battery cell 10.

[0112] The battery cell 10 is thermally connected to the thermal management component 30. The battery cell 10 and the thermal management component 30 may be in direct contact to achieve their thermal connection; alternatively, a heat conducting member may be provided between the battery cell 10 and the thermal management component 30 to achieve their thermal connection. The heat conducting member may be heat conducting glue or the like.

[0113] The thermal management component 30 is provided with a flow channel 301 for flowing in or out a fluid medium. The fluid medium flows into the flow channel 301 so that the fluid medium exchanges heat with the thermal management component 30, thereby managing the temperature of the thermal management component 30. The thermal management component 30 exchanges heat with the battery cell 10 to manage the temperature of the battery cell 10. During the process of managing the temperature of the battery cell 10, the temperature of the battery cell 10 is managed by regulating the temperature of the fluid medium flowing into the flow channel 301.

[0114] The first pipeline 40 is communicated with the flow channel 301. The flow channel 301 has a liquid inlet and a liquid outlet. The first pipeline 40 may be communicated with the liquid inlet of the flow channel 301. The first pipeline 40 is used to supply the fluid medium to the flow channel 301. The first heat insulation member 50 insulates the first pipeline 40 to stabilize the temperature of the fluid medium in the first pipeline 40; alternatively, the first pipeline 40 may be communicated with the liquid outlet of the flow channel 301. The first pipeline 40 is used to receive the fluid medium discharged from the flow channel 301. The first heat insulation member 50 can insulate the first pipeline 40, reduce the heat released or absorbed by the fluid medium through the first pipeline 40, and reduce the influence of the fluid medium discharged from the flow channel 301 on the internal temperature environment of the box body 20.

[0115] The first pipeline 40 may be connected to the thermal management component 30, and the first pipeline 40 is directly communicated with the flow channel 301; alternatively, the first pipeline 40 may be connected to the thermal management component 30 through a first intermediate member, and the first pipeline 40 is communicated with the flow channel 301 through the first intermediate member. The first intermediate member may be an adapter.

[0116] The first heat insulation member 50 is coated on the outer surface of the first pipeline 40 so that the first heat insulation member 50 fits on the outer surface of the first pipeline 40. The first heat insulation member 50 may only coat a part of the outer surface of the first pipeline 40. For example, a clamp is provided on the outer surface of the first pipeline 40. The clamp is used to fix the position of the first pipeline 40. The first heat insulation member 50 coats the part of the outer surface of the first pipeline 40 exposed outside the clamp and coats the outer surface of the clamp; alternatively, the first heat insulation member 50 may coat the entire outer surface of the first pipeline 40.

[0117] The flexural modulus of the first heat insulation member 50 can be a point value of any one of 20 MPa, 30 MPa, 45 MPa, 60 MPa, 75 MPa, 90 MPa, 105 MPa, 120 MPa, 135 MPa, 150 MPa, 165 MPa, 180 MPa, 195 MPa, 210 MPa, 225 MPa, 240 MPa, 255 MPa, 270 MPa, 285 MPa, 300 MPa, 315 MPa, 330 MPa, 345 MPa, 360 MPa, 375 MPa, 390 MPa, 405 MPa, 420 MPa, 435 MPa, 450 MPa, 465 MPa, 480 MPa, 495 MPa, 500 MPa or a point value between any two of them.

[0118] When the flexural modulus of the first heat insulation member 50 is between 20 MPa and 500 MPa, the first heat insulation member 50 can have high stiffness and shape stability. It can reduce the difficulty of the first heat insulation member 50 fitting onto the first pipeline 40, and the first heat insulation member 50 can maintain its shape when fitting onto the first pipeline 40, eliminating the need for additional fasteners 60 to fix the assembly of the first heat insulation member 50 and the first pipeline 40. Taking the example that a clamp is provided on the first pipeline 40, the clamp can be used for fixing the first pipeline 40. For instance, the first pipeline 40 is fixed to the inner wall of the box body 20 through the clamp to improve the position stability of the first pipeline 40. After the clamp is set on the first pipeline 40, it will protrude from the outer surface of the pipeline. Since the flexural modulus of the first heat insulation member 50 is between 20 MPa and 500 MPa, the first heat insulation member 50 can fit onto the outer surfaces of the first pipeline 40 on both sides of the clamp and also fit onto the outer surface of the clamp. In this way, on the one hand, it can reduce the setting difficulty of the first heat insulation member 50 and facilitate the installation of the first heat insulation member 50. On the other hand, it improves the heat insulation effect of the first heat insulation member 50 on the first pipeline 40 and the heat preservation effect of the first heat insulation member 50 on the first pipeline 40.

[0119] In the embodiment of the present application, by providing that the first pipeline 40 communicates with the flow channel 301, the first pipeline 40 can exchange fluid medium with the flow channel 301. When the flexural modulus of the first heat insulation member 50 is greater than or equal to 20 MPa, the stiffness and shape stability of the first heat insulation member 50 can be improved, so that after the first heat insulation member 50 and the first pipeline 40 are assembled, the first heat insulation member 50 can better maintain its shape and fit tightly with the first pipeline 40, thereby improving the heat insulation effect, and the appropriate stiffness is also beneficial to the positioning and fixing of the first heat insulation member 50 during the assembly process; when the flexural modulus of the first heat insulation member 50 is less than 500 MPa, the flexibility and elasticity of the first heat insulation member 50 can be improved, the processing difficulty can be reduced, and it is easier to adapt to the shape of the first pipeline 40 through plastic deformation, which not only improves the convenience of assembly, but also reduces the processing cost; thus, by providing that the first heat insulation member 50 covers at least a part of the outer surface of the first pipeline 40, and when the flexural modulus of the first heat insulation member 50 is 20 MPa - 500 MPa, it is possible to take into account improving the stiffness and shape stability of the first heat insulation member 50 and improving the flexibility and elasticity of the first heat insulation member 50, improving the heat insulation effect of the first heat insulation member 50 and reducing the processing difficulty of the first heat insulation member 50, thereby improving the heat insulation effect of the first heat insulation member 50 on the first pipeline 40, making the temperature of the fluid medium in the first pipeline 40 stable, improving the temperature control effect of the heat management component 30 on the battery cell 10, reducing the risk of temperature imbalance of the battery cell 10, and improving the reliability of the battery device 100.

[0120] In some embodiments, the flexural modulus of the first heat insulation member 50 is 100 MPa - 400 MPa.

[0121] The flexural modulus of the first heat insulation member 50 can be any point value among 100 MPa, 110 MPa, 120 MPa, 130 MPa, 140 MPa, 150 MPa, 160 MPa, 170 MPa, 180 MPa, 190 MPa, 200 MPa, 210 MPa, 220 MPa, 230 MPa, 240 MPa, 250 MPa, 260 MPa, 270 MPa, 280 MPa, 290 MPa, 300 MPa, 310 MPa, 320 MPa, 330 MPa, 340 MPa, 350 MPa, 360 MPa, 370 MPa, 380 MPa, 390 MPa, 400 MPa or any point value between any two of them.

[0122] In this embodiment, when the flexural modulus of the first heat insulation member 50 is greater than or equal to 100 MPa, the stiffness and shape stability of the first heat insulation member 50 can be further improved. After the first heat insulation member 50 and the first pipe 40 are assembled, the first heat insulation member 50 can better maintain its shape and fit tightly with the first pipe 40, thereby improving the heat insulation effect. When the flexural modulus of the first heat insulation member 50 is less than or equal to 400 MPa, the flexibility and elasticity of the first heat insulation member 50 can be further improved, the processing difficulty can be reduced, and it is easier to adapt to the shape of the first pipe 40 through plastic deformation, which not only improves the assembly convenience but also reduces the processing cost. Therefore, when the flexural modulus of the first heat insulation member 50 is 100 MPa - 400 MPa, it can further balance the improvement of the stiffness and shape stability of the first heat insulation member 50 and the improvement of the flexibility and elasticity of the first heat insulation member 50, improve the heat insulation effect of the first heat insulation member 50 and save the processing cost.

[0123] In some embodiments, please refer to Figure 7 and Figure 8 , Figure 7 which is an assembly drawing of the first pipe 40 and the first heat insulation member 50 provided in some other embodiments of the present application; Figure 8 is Figure 7 the A - A cross-sectional view of Figure 9 is Figure 7 the B - B cross-sectional view of . The first heat insulation member 50 includes a core material 51 and a barrier layer 52. The barrier layer 52 has an enclosed space 521, and the core material 51 is accommodated in the enclosed space 521.

[0124] The core material 51 is located in the enclosed space 521 of the barrier layer 52. It can be that the barrier layer 52 seals the enclosed space 521 and the core material 51 is sealed in the enclosed space 521; or the enclosed space 521 communicates with the outside through an opening, and the core material 51 enters the enclosed space 521 through the opening to facilitate accommodating the core material 51 in the enclosed space 521.

[0125] In this embodiment, by accommodating the core material 51 in the enclosed space 521 of the barrier layer 52, on the one hand, the strength of the first heat insulation member 50 can be enhanced, the plastic deformation difficulty of the first heat insulation member 50 can be reduced, and the processing cost can be saved; on the other hand, the heat insulation performance of the first heat insulation member 50 can be enhanced, and the heat insulation ability of the first heat insulation member 50 for the first pipe 40 can be improved.

[0126] In some embodiments, the core material 51 is fumed silica, polyurethane foam, polystyrene foam, or polyethylene foam.

[0127] By using a core material 51 with a relatively large flexural modulus, the overall flexural modulus of the first heat insulation member 50 can be improved. The core material 51 is accommodated in the enclosed space 521, and the enclosed space 521 can restrict the position of the core material 51.

[0128] In some embodiments, the barrier layer 52 is an aluminum foil or a polymer film. Manufacturing the barrier layer 52 with an aluminum foil or a polymer film can improve the sealing performance of the barrier layer 52 and enhance the coating effect of the barrier layer 52 on the core material 51.

[0129] In some embodiments, the first heat insulation member 50 is a vacuum insulation panel.

[0130] After the core material 51 is disposed within the barrier layer 52, the enclosed space 521 is evacuated to reduce heat conduction of the gas within the enclosed space 521 and improve the heat insulation performance of the first heat insulation member 50.

[0131] In this embodiment, the first heat insulation member 50 has excellent heat insulation performance, which is conducive to fitting the first heat insulation member 50 to the first pipe 40 and facilitating the installation of the first heat insulation member 50.

[0132] In some embodiments, please continue to refer to Figure 6 . The first pipe 40 includes a connected first pipe body 41 and a second pipe body 42. The outer diameter of the first pipe body 41 is greater than the outer diameter of the second pipe body 42. The first heat insulation member 50 covers at least a part of the outer surface of the first pipe body 41 and at least a part of the outer surface of the second pipe body 42.

[0133] The first pipe body 41 and the second pipe body 42 may be directly connected, for example, by welding or clamping; or the first pipe body 41 and the second pipe body 42 may be indirectly connected, for example, by bonding the first pipe body 41 and the second pipe body 42. The outer diameter of the first pipe body 41 is greater than the outer diameter of the second pipe body 42, so that a step surface 411 is formed at the connection of the first pipe body 41 and the second pipe body 42. The step surface 411 is located on the first pipe body 41 and connects the outer peripheral surface of the first pipe body 41 and the outer peripheral surface of the second pipe body 42. The first heat insulation member 50 covers the outer surface of the first pipe body 41 and the outer surface of the second pipe body 42, so that the first heat insulation member 50 fits the outer surface of the first pipe body 41 and the outer surface of the second pipe body 42. Since the bending modulus of the first heat insulation member 50 is 20 MPa - 500 MPa, the first heat insulation member 50 can better fit the outer peripheral surface of the first pipe body 41, the outer peripheral surface of the second pipe body 42, and the step surface 411, thereby reducing the influence of the step surface 411 on the fitting of the first heat insulation member 50 to the first pipe body 41 and the second pipe body 42 and improving the heat insulation effect of the first heat insulation member 50.

[0134] The first heat insulation member 50 may cover only a part of the outer surface of the first pipe body 41; or the first heat insulation member 50 may cover the entire outer surface of the first pipe body 41. The first heat insulation member 50 may cover only a part of the outer surface of the second pipe body 42; or the first heat insulation member 50 may cover the entire outer surface of the second pipe body 42.

[0135] In this embodiment, the first heat insulation member 50 can be attached to the outer surface of the first pipe body 41 and can also be attached to the outer surface of the second pipe body 42. The first heat insulation member 50 is convenient to install and improves the heat insulation effect of the first heat insulation member 50 on the first pipe body 41 and the second pipe body 42.

[0136] In some embodiments, please continue to refer to Figures 7 - 9 . The battery device 100 further includes a fixing member 60 for fixing the first pipe 40. The fixing member 60 is connected to the box body 20, and the first heat insulation member 50 wraps at least a part of the fixing member 60.

[0137] The fixing member 60 connects the box body 20 and the first pipe 40. The fixing member 60 can be directly connected to the first pipe 40. For example, the fixing member 60 is welded to the first pipe 40; alternatively, the fixing member 60 can be indirectly connected to the first pipe 40. For example, the fixing member 60 is connected to the first pipe 40 through a fastener, and the fastener can be a screw. The fixing member 60 can be directly connected to the box body 20, such as insertion, welding, or snap connection; alternatively, the fixing member 60 can be indirectly connected to the box body 20. For example, the fixing member 60 is connected to the box body 20 through a fastener, and the fastener can be a bolt.

[0138] The first heat insulation member 50 can wrap only a part of the fixing member 60; alternatively, the first heat insulation member 50 can wrap the entire fixing member 60.

[0139] In this embodiment, by providing the fixing member 60, the fixing member 60 can fix the position of the first pipe 40, and the first heat insulation member 50 wraps at least a part of the fixing member 60 so that the first heat insulation member 50 can improve the heat insulation effect on the fixing member 60; on the other hand, the first heat insulation member 50 wraps the fixing member 60, which is beneficial for the first heat insulation member 50 to wrap the first pipes 40 on both sides of the fixing member 60, reduces the installation difficulty of the first heat insulation member 50, and improves the heat insulation performance of the first heat insulation member 50 on the first pipes 40.

[0140] In some embodiments, please continue to refer to Figures 7 - 9 . The fixing member 60 includes a main body portion 601 and a connecting portion 602. The main body portion 601 is disposed around the first pipe 40, the connecting portion 602 is connected to the main body portion 601, the first heat insulation member 50 covers the outer surface of the main body portion 601, and the first heat insulation member 50 is provided with an avoidance portion, and the connecting portion 602 passes through the avoidance portion and is connected to the box body 20.

[0141] The main body part 601 surrounds the first pipe 40 so that the main body part 601 restricts the position of the first pipe 40. The connecting part 602 and the main body part 601 can be integrally formed, for example, the connecting part 602 and the main body part 601 are integrally injection-molded; or the connecting part 602 and the main body part 601 are separately arranged and connected, for example, the connecting part 602 and the main body part 601 are welded and connected.

[0142] The avoidance part can be a through hole provided in the first heat insulation member 50; or it can be a notch on the first heat insulation member 50. The avoidance part penetrates through the first heat insulation member 50 to facilitate the connection of the connecting part 602 to the box body 20 and the main body part 601.

[0143] One end of the connecting part 602 is connected to the main body part 601, and the other end is connected to the box body 20. The connecting part 602 can be bolted, welded, adhered, etc. to the box body 20. Exemplarily, the fixing member 60 is a clamp, the main body part 601 of the clamp surrounds the first pipe 40, and the connecting part 602 of the clamp is bolted to the box body 20.

[0144] In this embodiment, by providing the avoidance part to avoid the installation of the connecting part 602, the difficulty of setting the first heat insulation member 50 is reduced, and it is also beneficial for the first heat insulation member 50 to fit more on the surface of the first pipe 40, improving the heat insulation performance of the first heat insulation member 50 for the first pipe 40.

[0145] The embodiment of the present application provides an electrical device, including the battery device 100 provided in any one of the above embodiments.

[0146] In some embodiments, please refer to Figure 10 , Figure 10 is a schematic structural diagram of an electrical device provided in some embodiments of the present application. The electrical device further includes a second pipe 4001 and a second heat insulation member 4002. The second pipe 4001 is located outside the box body 20, the second pipe 4001 is connected to the box body 20 and communicates with the first pipe 40. The second heat insulation member 4002 covers at least a part of the outer surface of the second pipe 4001, and the flexural modulus of the second heat insulation member 4002 is 20 MPa - 500 MPa.

[0147] The second pipe 4001 is connected to the box body 20 and communicates with the first pipe 40. The first pipe 40 and the second pipe 4001 can be directly communicated; or a connector is provided on the box body 20, the first pipe 40 located inside the box body 20 is connected to one end of the connector located inside the box body 20, and the second pipe 4001 located outside the box body 20 is connected to one end of the connector located outside the box body 20.

[0148] The second heat insulation member 4002 can cover all of the outer surface of the second pipe 4001; or it can cover only a part of the outer surface of the second pipe 4001.

[0149] The flexural modulus of the second heat insulating member 4002 may be the same as or different from that of the first heat insulating member 50. The flexural modulus of the second heat insulating member 4002 may be a point value of any one of 20 MPa, 30 MPa, 45 MPa, 60 MPa, 75 MPa, 90 MPa, 105 MPa, 120 MPa, 135 MPa, 150 MPa, 165 MPa, 180 MPa, 195 MPa, 210 MPa, 225 MPa, 240 MPa, 255 MPa, 270 MPa, 285 MPa, 300 MPa, 315 MPa, 330 MPa, 345 MPa, 360 MPa, 375 MPa, 390 MPa, 405 MPa, 420 MPa, 435 MPa, 450 MPa, 465 MPa, 480 MPa, 495 MPa, 500 MPa or a point value between any two of them.

[0150] In this embodiment, when the flexural modulus of the second heat insulating member 4002 is greater than or equal to 20 MPa, the stiffness and shape stability of the second heat insulating member 4002 can be improved, so that after the second heat insulating member 4002 and the second pipe 4001 are assembled, the second heat insulating member 4002 can better maintain its shape and fit tightly with the second pipe 4001, thereby improving the heat insulation effect, and the appropriate stiffness is also beneficial to the positioning and fixing of the second heat insulating member 4002 during the assembly process; when the flexural modulus of the second heat insulating member 4002 is less than or equal to 500 MPa, the flexibility and elasticity of the second heat insulating member 4002 can be improved, the processing difficulty can be reduced, and it can more easily adapt to the shape of the second pipe 4001 through plastic deformation, which not only improves the assembly convenience, but also reduces the processing cost; therefore, when the flexural modulus of the second heat insulating member 4002 is 20 MPa - 500 MPa, it is possible to balance the improvement of the stiffness and shape stability of the second heat insulating member 4002 and the improvement of the flexibility and elasticity of the second heat insulating member 4002, improve the heat insulation effect of the second heat insulating member 4002 and reduce the processing difficulty of the second heat insulating member 4002, thereby improving the heat insulation effect of the second heat insulating member 4002 on the second pipe 4001, making the temperature of the fluid medium in the second pipe 4001 stable, improving the temperature control effect of the thermal management component 30 on the battery cell 10, reducing the risk of temperature imbalance of the battery cell 10, and improving the reliability of the battery device 100.

[0151] An electric device provided by an embodiment of the present application includes a battery device 100, a first pipe 40 and a first heat insulating member 50; the battery device 100 includes a box body 20; the first pipe 40 is located outside the box body 20 and is connected to the box body 20; the first heat insulating member 50 covers at least a part of the outer surface of the first pipe 40, and the flexural modulus of the first heat insulating member 50 is 20 MPa - 500 MPa.

[0152] The battery device 100 further includes a thermal management component 30. The first pipeline 40 is connected to the box body 20 and is in communication with the thermal management component 30. The first heat insulation member 50 may cover only a part of the outer surface of the first pipeline 40, or the first heat insulation member 50 may cover the entire outer surface of the first pipeline 40. The flexural modulus of the first heat insulation member 50 may be any point value among 20 MPa, 30 MPa, 45 MPa, 60 MPa, 75 MPa, 90 MPa, 105 MPa, 120 MPa, 135 MPa, 150 MPa, 165 MPa, 180 MPa, 195 MPa, 210 MPa, 225 MPa, 240 MPa, 255 MPa, 270 MPa, 285 MPa, 300 MPa, 315 MPa, 330 MPa, 345 MPa, 360 MPa, 375 MPa, 390 MPa, 405 MPa, 420 MPa, 435 MPa, 450 MPa, 465 MPa, 480 MPa, 495 MPa, 500 MPa or any point value between any two of them.

[0153] In this embodiment, when the flexural modulus of the first heat insulation member 50 is greater than or equal to 20 MPa, the stiffness and shape stability of the first heat insulation member 50 can be improved, so that after the first heat insulation member 50 and the first pipeline 40 are assembled, the first heat insulation member 50 can better maintain its shape and closely fit with the first pipeline 40, thereby improving the heat insulation effect, and the appropriate stiffness is also beneficial to the positioning and fixing of the first heat insulation member 50 during the assembly process; when the flexural modulus of the first heat insulation member 50 is less than or equal to 500 MPa, the flexibility and elasticity of the first heat insulation member 50 can be improved, the processing difficulty can be reduced, and it is easier to adapt to the shape of the first pipeline 40 through plastic deformation, which not only improves the assembly convenience but also reduces the processing cost; in this way, by setting the first heat insulation member 50 to cover at least a part of the outer surface of the first pipeline 40 and when the flexural modulus of the first heat insulation member 50 is 20 MPa - 500 MPa, it is possible to take into account improving the stiffness and shape stability of the first heat insulation member 50 and improving the flexibility and elasticity of the first heat insulation member 50, improving the heat insulation effect of the first heat insulation member 50 and reducing the processing difficulty of the first heat insulation member 50, thereby improving the heat insulation effect of the first heat insulation member 50 on the first pipeline 40, reducing the heat loss of the first pipeline 40 located outside the box body 20, making the temperature of the fluid medium in the first pipeline 40 stable, improving the temperature control effect of the thermal management component 30 on the battery cell 10, reducing the risk of temperature imbalance of the battery cell 10, and improving the reliability of the battery device 100.

[0154] Please continue to refer to Figures 4 - 9, an embodiment of the present application provides a battery device 100, which includes a box body 20, battery cells 10, a thermal management component 30, a first pipeline 40, and a first heat insulation member 50; the battery cells 10 are accommodated in the box body 20; the thermal management component 30 is accommodated in the box body 20, and the thermal management component 30 includes a flow channel 301, and the flow channel 301 is configured to accommodate a fluid medium to manage the temperature of the battery cells 10; the first pipeline 40 is accommodated in the box body 20, and the first pipeline 40 communicates with the flow channel 301; the first heat insulation member 50 covers at least a part of the outer surface of the first pipeline 40, and the flexural modulus of the first heat insulation member 50 is 20 MPa - 500 MPa. Wherein, the first heat insulation member 50 is a vacuum insulation panel, and the first heat insulation member 50 includes a core material 51 and a barrier layer 52, the barrier layer 52 has an enclosed space 521, and the core material 51 is accommodated in the enclosed space 521. The battery device 100 further includes a fixing member 60 for fixing the first pipeline 40, the fixing member 60 includes a main body portion 601 and a connecting portion 602, the main body portion 601 is disposed around the first pipeline 40, the connecting portion 602 is connected to the main body portion 601, the first heat insulation member 50 covers the outer surface of the main body portion 601, the first heat insulation member 50 is provided with an avoidance portion, and the connecting portion 602 passes through the avoidance portion and is connected to the box body 20.

[0155] In this embodiment, by providing that the first pipeline 40 communicates with the flow channel 301, the first pipeline 40 can exchange fluid media with the flow channel 301. When the flexural modulus of the first heat insulation member 50 is greater than or equal to 20 MPa, the stiffness and shape stability of the first heat insulation member 50 can be improved, so that after the first heat insulation member 50 and the first pipeline 40 are assembled, the first heat insulation member 50 can better maintain its shape and fit tightly with the first pipeline 40, thereby improving the heat insulation effect, and the appropriate stiffness is also beneficial to the positioning and fixing of the first heat insulation member 50 during the assembly process; when the flexural modulus of the first heat insulation member 50 is less than 500 MPa, the flexibility and elasticity of the first heat insulation member 50 can be improved, the processing difficulty can be reduced, and it can more easily adapt to the shape of the first pipeline 40 through plastic deformation, which not only improves the assembly convenience, but also reduces the processing cost; thus, by providing that the first heat insulation member 50 covers at least a part of the outer surface of the first pipeline 40, and when the flexural modulus of the first heat insulation member 50 is 20 MPa - 500 MPa, it is possible to take into account improving the stiffness and shape stability of the first heat insulation member 50 and improving the flexibility and elasticity of the first heat insulation member 50, improving the heat insulation effect of the first heat insulation member 50 and reducing the processing difficulty of the first heat insulation member 50, thereby improving the heat insulation effect of the first heat insulation member 50 on the first pipeline 40, making the temperature of the fluid media in the first pipeline 40 stable, improving the temperature control effect of the thermal management component 30 on the battery cell 10, reducing the risk of temperature imbalance of the battery cell 10, and improving the reliability of the battery device 100. By accommodating the core material 51 in the enclosed space 521 of the barrier layer 52, on the one hand, the strength of the first heat insulation member 50 can be enhanced, the plastic deformation difficulty of the first heat insulation member 50 can be reduced, and the processing cost can be saved; on the other hand, the heat insulation performance of the first heat insulation member 50 can be enhanced, and the heat insulation ability of the first heat insulation member 50 for the first pipeline 40 can be improved. By providing an avoidance portion to avoid the installation of the connection portion 602, the setting difficulty of the first heat insulation member 50 is reduced, and it is also beneficial for the first heat insulation member 50 to fit more on the surface of the first pipeline 40, improving the heat insulation performance of the first heat insulation member 50 for the first pipeline 40.

[0156] It should be noted that, without conflict, the embodiments and features in the embodiments of the present application can be combined with each other.

[0157] The above embodiments are only used to illustrate the technical solutions of the present application, and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. 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, Comprising: A box body; A battery cell, accommodated in the box body; A thermal management component, accommodated in the box body, the thermal management component includes a flow channel configured to accommodate a fluid medium to manage the temperature of the battery cell; A first pipeline, accommodated in the box body, the first pipeline is communicated with the flow channel; A first heat insulation member, covering at least a part of the outer surface of the first pipeline, and the flexural modulus of the first heat insulation member is 20 MPa - 500 MPa.

2. The battery device according to claim 1, wherein The flexural modulus of the first heat insulation member is 100 MPa - 400 MPa.

3. The battery device according to claim 1, wherein, The first heat insulation member includes a core material and a barrier layer, the barrier layer has an enclosed space, and the core material is accommodated in the enclosed space.

4. The battery device according to claim 3, wherein The core material is fumed silica, polyurethane foam, polystyrene foam or polyethylene foam.

5. The battery device according to claim 3, characterized in that, The barrier layer is an aluminum foil or a polymer film.

6. The battery device according to any one of claims 1-5, characterized in that The first heat insulation member is a vacuum insulation panel.

7. The battery device according to any one of claims 1-5, characterized in that, The first pipeline includes a connected first pipe body and a second pipe body, the outer diameter of the first pipe body is larger than the outer diameter of the second pipe body, and the first heat insulation member covers at least a part of the outer surface of the first pipe body and at least a part of the outer surface of the second pipe body.

8. The battery device according to any one of claims 1-5, characterized in that, The battery device further includes a fixing member for fixing the first pipeline, the fixing member is connected to the box body, and the first heat insulation member wraps at least a part of the fixing member.

9. The battery device according to claim 8, wherein The fixing member includes a main body portion and a connecting portion, the main body portion is disposed around the first pipeline, the connecting portion is connected to the main body portion, the first heat insulation member covers the outer surface of the main body portion, and the first heat insulation member is provided with an avoidance portion, and the connecting portion passes through the avoidance portion and is connected to the box body.

10. An electrical device, characterized in that, Comprising the battery device according to any one of claims 1 - 9.

11. The electrical device according to claim 10, characterized in that, The electrical device further includes a second pipeline and a second heat insulation member, the second pipeline is located outside the box body, the second pipeline is connected to the box body and communicated with the first pipeline, the second heat insulation member covers at least a part of the outer surface of the second pipeline, and the flexural modulus of the second heat insulation member is 20 MPa - 500 MPa.

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