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 connector and a first heat management component, the battery monomers are accommodated in the box body; the connector comprises a connecting seat and a connecting terminal, the connecting seat is connected to the box body, the connecting terminal is arranged on the connecting seat, and the connecting terminal is electrically connected with the battery monomer. The first heat management component is provided with a first flow channel, and the first flow channel is used for containing a fluid medium so as to manage the temperature of the connecting terminal. The fluid medium in the first flow channel can exchange heat with the first heat management component, and the first heat management component can exchange heat with the connecting terminal, so that heat exchange between the fluid medium in the first flow channel and the connecting terminal is realized, the temperature management of the connecting terminal is realized, the risk of temperature imbalance of the connecting terminal is reduced, and the service life of the connecting terminal is prolonged. Therefore, the connection terminal can provide stable electric energy input or output for the single battery, and the reliability of the battery device is improved.

Description

Technical Field

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

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

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

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

[0005] In a first aspect, an embodiment of the present application provides a battery device, comprising a case, a battery cell, a connector and a first thermal management component; the battery cell is accommodated in the case; the connector comprises a connecting seat and a connecting terminal, the connecting seat is connected to the case, the connecting terminal is arranged on the connecting seat, and the connecting terminal is electrically connected to the battery cell; the first thermal management component has a first flow channel, the first flow channel is used to accommodate a fluid medium to manage the temperature of the connecting terminal.

[0006] In the above technical solution, the connection terminal is electrically connected to the battery cell, and the battery cell realizes the input or output of electric energy through the connection terminal. By setting a first thermal management component with a first flow channel to manage the temperature of the connection terminal, the fluid medium in the first flow channel can exchange heat with the first thermal management component, and the first thermal management component can exchange heat with the connection terminal, thereby realizing heat exchange between the fluid medium in the first flow channel and the connection terminal, and then realizing the management of the temperature of the connection terminal, reducing the risk of temperature imbalance of the connection terminal, so that the connection terminal can provide stable electric energy input or output for the battery cell, and improving the reliability of the battery device.

[0007] In some embodiments, the first flow channel is arranged around the connection terminal. In this way, the first flow channel surrounding the connection terminal can absorb the heat around the connection terminal or supply heat to the connection terminal from the circumference of the connection terminal, thereby improving the heat exchange efficiency of the first thermal management component and reducing the risk of damage to the connection terminal due to temperature imbalance.

[0008] In some embodiments, the first thermal management component is provided with a through hole, and the through hole passes through the first thermal management component along the extension direction of the connection terminal. The first thermal management component is located on one side of the connection seat, and the connection terminal is inserted in the through hole and partially extends out of the first thermal management component in a direction away from the connection seat, and the first flow channel is arranged around the through hole. By setting the connection terminal to be inserted in the through hole and the first flow channel to be arranged around the through hole, the first flow channel can be arranged around the connection terminal, thereby realizing the temperature management of the connection terminal by the first thermal management component. The through hole can also cover a part of the connection terminal to reduce the risk of short circuit between the connection terminal and other components.

[0009] In some embodiments, the connection base is provided with a plurality of connection terminals, and the through holes are multiple, and the through holes correspond to the connection terminals one by one; the first flow channel is arranged around the multiple through holes. By arranging the first flow channel around the multiple through holes, the fluid medium in the first flow channel can manage the temperature of the connection terminals inserted in the multiple through holes, thereby reducing the difficulty of setting the first flow channel.

[0010] In some embodiments, the connection base is provided with a plurality of connection terminals, and the through holes are multiple, and the through holes correspond to the connection terminals one by one; the first flow channel includes a plurality of annular flow channels that are interconnected, and each annular flow channel is arranged around a through hole. By arranging each annular flow channel to surround a through hole, the wrapping effect of the annular flow channel on the connection terminal can be improved, thereby improving the temperature control effect of the first thermal management component on the connection terminal, and reducing the risk of damage to the connection terminal due to temperature imbalance.

[0011] In some embodiments, the battery device further includes a heat conducting member, at least a portion of which is located in the through hole and connects the hole wall of the through hole and the connection terminal. In this way, the heat conducting member can conduct heat between the first thermal management component and the connection terminal, thereby improving the heat conduction effect between the first thermal management component and the connection terminal and improving the performance of the connector.

[0012] In some embodiments, the heat conducting element includes heat conducting glue, which reduces the difficulty of setting the heat conducting element, makes the setting of the heat conducting element more convenient, and reduces the cost.

[0013] In some embodiments, the connection terminal is inserted into the connection seat, and the connection seat has a first surface along the extension direction of the connection terminal, and a convex portion is convexly provided on the first surface, and the convex portion is arranged around the connection terminal, and the connection terminal extends out of the convex portion in a direction away from the first surface, and the convex portion is at least partially accommodated in the through hole. By arranging the convex portion around the connection terminal, the convex portion can improve the connection strength between the connection terminal and the connection seat. The convex portion is at least partially accommodated in the through hole, so that the first flow channel is arranged around the convex portion, so that the first thermal management component can absorb the heat of the connection terminal through the convex portion or conduct heat to the connection terminal through the convex portion, thereby improving the heat conduction efficiency between the first thermal management component and the connection terminal, and improving the performance of the connector.

[0014] In some embodiments, there is a gap between the protrusion and the wall surface of the through hole. In this way, the difficulty of assembling the first thermal management component and the connector can be reduced.

[0015] In some embodiments, the protrusion contacts the wall surface of the through hole. In this way, the heat conduction efficiency between the first heat management component and the connecting terminal can be improved, and the performance of the connector can be improved.

[0016] In some embodiments, the battery device further includes a heat conducting member, at least a portion of which is located in the through hole and connects the protrusion and the hole wall of the through hole. In this way, the heat conducting member can improve the heat conduction efficiency between the protrusion and the first thermal management component, thereby improving the performance of the connector.

[0017] In some embodiments, the first thermal management component is connected to the connection seat. In this way, on the one hand, the position between the first thermal management component and the connection seat is more stable, which is convenient for assembling the first thermal management component; on the other hand, heat can be transferred between the first thermal management component and the connection terminal through the connection seat, which improves the heat transfer efficiency between the first thermal management component and the connection terminal.

[0018] In some embodiments, the first thermal management component is connected to the connection seat by heat melting, thereby reducing the difficulty of assembling the first thermal management component and the connection seat and reducing the processing cost of the battery device.

[0019] In some embodiments, the battery device further includes a second thermal management component, which is contained in the box body and has a second flow channel, which is used to contain a fluid medium to manage the temperature of the battery cell; the first flow channel and the second flow channel are connected. In this way, the fluid medium can flow in the first flow channel and the second flow channel to achieve temperature control of the connector and the battery cell, reduce the risk of temperature imbalance between the connector and the battery cell, and improve the reliability of the battery device.

[0020] In some embodiments, the first flow channel has a first inlet and a first outlet, the second flow channel has a second inlet and a second outlet, the first inlet is connected to the second inlet, and the first outlet is connected to the second outlet, so that the first flow channel and the second flow channel are connected. In this way, the first flow channel and the second flow channel are connected in parallel, so that the temperature of the fluid medium flowing through the first thermal management component is the same as the temperature of the fluid medium flowing through the second thermal management component, thereby reducing the impact of the temperature imbalance of one of the connector and the battery cell on the other, and improving the reliability of the battery device.

[0021] In some embodiments, the first flow channel has a first inlet and a first outlet, the second flow channel has a second inlet and a second outlet, and the first outlet is connected to the second inlet to achieve communication between the first flow channel and the second flow channel. In this way, the fluid medium of the first thermal management component flows into the second thermal management component, which facilitates the flow of the fluid medium in the first thermal management component and the second thermal management component, reduces the difficulty of setting the first thermal management component and the second thermal management component, and reduces the setting cost of the first thermal management component and the second thermal management component.

[0022] In some embodiments, the connection base has a third flow channel, the third flow channel is connected to the first flow channel, and the third flow channel is used to provide a fluid medium to the first flow channel. By providing the third flow channel, the fluid medium can be introduced into the first thermal management component through the connection base, reducing the path for the fluid medium to be introduced into the first thermal management component and reducing the difficulty of conducting the fluid medium.

[0023] In some embodiments, the battery device further includes a second thermal management component, which is contained in the box body and has a second flow channel, which is used to contain a fluid medium to manage the temperature of the battery cell; the first flow channel connects the second flow channel and the third flow channel. In this way, the fluid medium is introduced into the first thermal management component and the second thermal management component through the connecting seat, which reduces the difficulty of conducting the fluid medium and reduces the installation cost of the first thermal management component and the second thermal management component.

[0024] In a second aspect, embodiments of the present application provide an electrical device, including a battery device provided by any embodiment of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0027] Figure 2 An exploded view of a battery device provided in some embodiments of the present application;

[0028] Figure 3 An exploded view of a battery cell provided for some embodiments of the present application;

[0029] Figure 4 An exploded view of a battery device provided in some other embodiments of the present application;

[0030] Figure 5 An assembly diagram of a connector and a first thermal management component provided for some embodiments of the present application;

[0031] Figure 6 for Figure 5 AA section view;

[0032] Figure 7 for Figure 5 BB cross-sectional view;

[0033] Figure 8 An assembly diagram of a connector and a first thermal management component provided for still other embodiments of the present application;

[0034] Fig. 9 for Figure 8 CC section view;

[0035] Fig.10 for Fig. 9 A partial enlarged view of the middle A area;

[0036] Fig.11 A schematic diagram of the structure of a battery device provided in some embodiments of the present application;

[0037] Fig.12 A schematic diagram of the structure of the first flow channel and the second flow channel provided in some embodiments of the present application;

[0038] Fig.13 A schematic diagram of the structure of the first flow channel and the second flow channel provided in some other embodiments of the present application;

[0039] Fig.14 An assembly diagram of a connection base and a first thermal management component provided for some embodiments of the present application;

[0040] Fig.15 for Fig.14 DD cross-sectional view;

[0041] Fig.16 A schematic structural diagram of a connection socket, a first thermal management component, and a second thermal management component provided in some embodiments of the present application.

[0042] Icons: 1-housing; 11-shell; 12-end cap; 2-electrode assembly; 3-electrode terminal; 10-battery cell;

[0043] 20-box; 201-first box; 202-second box; 203-accommodation space;

[0044] 30-connector; 301-connection seat; 3011-first surface; 3012-convex portion; 3013-third flow channel; 302-connection terminal; 3021-first end; 3022-second end;

[0045] 40 - first thermal management component; 401 - first flow channel; 4011 - first inlet; 4012 - first outlet; 402 - through hole; 4021 - gap;

[0046] 50-heat conducting member;

[0047] 60 - second thermal management component; 601 - second flow channel; 6011 - second inlet; 6012 - second outlet;

[0048] 100 - battery device; 200 - controller; 300 - motor; 1000 - vehicle; X - extension direction of the connection terminal. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0051] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0052] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0053] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0054] The term “plurality” used in this application refers to two or more (including two).

[0055] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0056] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, and the like.

[0057] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to reduce the risk of short circuit between the positive and negative electrodes, while allowing active ions to pass through.

[0058] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0059] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0060] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0061] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other traditional materials that can be used as positive electrode active materials for battery cells may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium-containing phosphates may include, but are not limited to, lithium iron phosphate (such as LiFePO 4 (also referred to as LFP), composite materials of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO 4 ), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon. Examples of lithium transition metal oxides may include but are not limited to lithium cobalt oxide (such as LiCoO 2 ), lithium nickel oxide (such as LiNiO 2 ), lithium manganese oxide (such as LiMnO 2 、LiMn2O 4 ), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3 Mn 1 / 3 O 2 (Also referred to as NCM 333 )、LiNi 0.5 Co 0.2 Mn 0.3 O 2 (Also referred to as NCM 523 )、LiNi 0.5 Co 0.25 Mn 0.25 O 2 (Also referred to as NCM 211 )、LiNi 0.6 Co 0.2 Mn 0.2 O 2 (Also referred to as NCM 622 )、LiNi 0.8 Co 0.1 Mn 0.1 O 2 (Also referred to as NCM 811 ), lithium nickel cobalt aluminum oxide (such as LiNi 0.85 Co 0.15 Al 0.05 O 2 ) and at least one of its modified compounds, etc.

[0062] In some embodiments, the positive electrode may be a foamed metal. The foamed metal may be a nickel foam, a copper foam, an aluminum foam, an alloy foam, etc. When the foamed metal is used as the positive electrode, the positive electrode active material may not be provided on the surface of the foamed metal, but of course, the positive electrode active material may also be provided. As an example, a lithium source material, potassium metal or sodium metal may also be filled or / and deposited in the foamed metal, and the lithium source material is lithium metal and / or a lithium-rich material.

[0063] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0064] As an example, the negative electrode current collector may be a metal foil, a foamed metal or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The foamed metal may be foamed nickel, foamed copper, foamed aluminum, foamed alloy, etc. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0065] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0066] As an example, the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is disposed on either or both of the two facing surfaces of the negative electrode current collector.

[0067] As an example, the negative electrode active material may adopt the negative electrode active material for battery cells known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0068] In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0069] In some embodiments, the separator is a separator membrane, which can be any known porous separator membrane with good chemical stability and mechanical stability.

[0070] As an example, the material of the separator may include at least one of glass fiber, non-woven fabric, polyethylene, polypropylene and polyvinylidene fluoride. The separator may be a single-layer film or a multi-layer composite film. When the separator is a multi-layer composite film, the materials of each layer may be the same or different. The separator may be a separate component located between the positive and negative electrodes, or may be attached to the surface of the positive and negative electrodes.

[0071] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.

[0072] In some embodiments, the battery cell further includes an electrolyte, which plays a role in conducting ions between the positive and negative electrodes. The electrolyte can be liquid, gel or solid. Among them, the liquid electrolyte includes an electrolyte salt and a solvent.

[0073] In some embodiments, the electrolyte salt may include at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bisfluorosulfonyl imide, lithium bistrifluoromethanesulfonyl imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalatoborate, lithium dioxalatoborate, lithium difluorodioxalatophosphate, and lithium tetrafluorooxalatophosphate.

[0074] In some embodiments, the solvent may include at least one of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, cyclopentane, dimethyl sulfone, methyl ethyl sulfone and diethyl sulfone. The solvent may also be an ether solvent. The ether solvent may include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyltetrahydrofuran, diphenyl ether and crown ether.

[0075] Among them, the gel electrolyte includes a skeleton network with a polymer as the electrolyte, combined with an ionic liquid-lithium salt.

[0076] Among them, solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0077] As an example, the polymer solid electrolyte may be polyether (polyethylene oxide), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, a single ion polymer, polyionic liquid-lithium salt, cellulose, and the like.

[0078] As an example, the inorganic solid electrolyte may include an oxide solid electrolyte (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON film), a sulfide solid electrolyte (crystalline lithium superion conductor (lithium germanium phosphosulfide, silver germanium sulfide), amorphous sulfide) and one or more of a halide solid electrolyte, a nitride solid electrolyte and a hydride solid electrolyte.

[0079] As an example, the composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte.

[0080] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0081] In some embodiments, the electrode assembly is a laminate structure.

[0082] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets may be provided respectively, and the plurality of positive electrode sheets and the plurality of negative electrode sheets may be alternately stacked.

[0083] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet is folded to form a plurality of stacked folded segments, with a positive electrode sheet sandwiched between adjacent folded segments.

[0084] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of stacked folded sections.

[0085] As an example, a plurality of separators may be provided, each of which is provided between any adjacent positive electrode sheets or negative electrode sheets.

[0086] As an example, the separator may be disposed continuously, and may be disposed between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0087] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0088] In some embodiments, the electrode assembly is provided with tabs, which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0089] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0090] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery cell, such as a hexagonal battery cell.

[0091] The battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, in parallel or in mixed connection through a busbar.

[0092] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module.

[0093] As an example, a battery module may be formed by bundling a plurality of battery cells by cable ties.

[0094] In some embodiments, the battery device may be a battery pack, which may include a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0095] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0096] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0097] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0098] 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.

[0099] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0100] In some embodiments, the battery device refers to an energy storage device, which includes a box body, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0101] During the use of the battery device, the battery device needs to be electrically connected to an external device through a connector to achieve the input or output of power from the battery device. The temperature of the connector affects the performance of the battery device. However, the current capacity of the connector and the external environment can easily affect the temperature of the connector.

[0102] When the battery device is charging and discharging, in order to improve the charging and discharging efficiency of the battery device, the connector is usually required to be able to pass a larger current to meet the fast charging or fast discharging of the battery device; however, as the current passing through the connector increases, the heat generated by the connector when the current is over, which can easily cause the connector to become hot and cause damage to the connector. When the connector is in a low temperature environment, the low temperature can easily cause the conductor of the connector to shrink, increase the contact resistance of the connector, and affect the transmission of current; and when the connector is at a low temperature, the surface of the connector is prone to condensation of moisture in the air, causing the connector to short-circuit or corrode, so both high and low temperatures of the connector can easily affect the reliability of the battery device.

[0103] In view of this, in order to improve the reliability of the battery device, an embodiment of the present application provides a battery device, including a box, a battery cell, a connector and a first thermal management component. The battery cell is accommodated in the box. The connector includes a connection seat and a connection terminal, the connection seat is connected to the box, the connection terminal is arranged on the connection seat, and the connection terminal is electrically connected to the battery cell. The first thermal management component has a first flow channel, and the first flow channel is used to accommodate a fluid medium to manage the temperature of the connection terminal.

[0104] In such a battery device, the temperature of the connecting terminal is managed by providing a first thermal management component with a first flow channel. The fluid medium in the first flow channel can exchange heat with the first thermal management component, and the first thermal management component can exchange heat with the connecting terminal, thereby achieving heat exchange between the fluid medium in the first flow channel and the connecting terminal, and then achieving temperature management of the connecting terminal, reducing the risk of temperature imbalance of the connecting terminal, enabling the connecting terminal to provide stable power input or output for the battery cell, and improving the reliability of the battery device.

[0105] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells and battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0106] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0107] Please refer to Figure 1 , Figure 1 The schematic diagram of the structure of the vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 is provided with a battery device 100 inside, and the battery device 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000.

[0108] The vehicle 1000 may further include a controller 200 and a motor 300 , wherein the controller 200 is used to control the battery device 100 to supply power to the motor 300 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1000 .

[0109] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0110] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery device 100 provided in some embodiments of the present application. The battery device 100 may include a case 20 and a battery cell 10 . The case 20 is used to accommodate the battery cell 10 .

[0111] Among them, a closed space for accommodating the battery cell 10 is formed inside the box 20. The box 20 can adopt a variety of structures. In some embodiments, the box 20 may include a first box 201 and a second box 202, and the first box 201 and the second box 202 are buckled with each other. The first box 201 and the second box 202 can be in various shapes, such as a cuboid, a cylinder, etc. The first box 201 can be a hollow structure with one side open, and the second box 202 can also be a hollow structure with one side open. The open side of the second box 202 and the open side of the first box 201 are buckled with each other to form a box 20 with a closed space. It is also possible that the first box 201 is a hollow structure with one side open, and the second box 202 is a plate-like structure. The second box 202 is buckled on the open side of the first box 201, so as to form a box 20 with a accommodating space 203.

[0112] In the battery device 100, there may be one or more battery cells 10. If there are more than one battery cell 10, the battery cells 10 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the battery cells 10 are both connected in series and in parallel. The battery modules may be formed by connecting the battery cells 10 in series, in parallel, or in a mixed connection, and then the battery modules are formed into a whole by connecting the battery cells in series, in parallel, or in a mixed connection, and then accommodated in the box 20. Alternatively, all the battery cells 10 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by all the battery cells 10 is accommodated in the box 20.

[0113] In some embodiments, the battery device 100 may further include a busbar, through which multiple battery cells 10 may be electrically connected to each other, so as to realize series connection, parallel connection or mixed connection of multiple battery cells 10. The busbar may be a metal conductor, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0114] Please refer to Figure 3 , Figure 3 An exploded view of a battery cell 10 provided in some embodiments of the present application. The battery cell 10 may include a housing 1 and an electrode assembly 2, wherein the electrode assembly 2 is accommodated in the housing 1.

[0115] In some embodiments, the housing 1 may include a shell 11 and an end cap 12, wherein the shell 11 has an opening, and the end cap 12 closes the opening of the shell 11. The closing here means covering or closing, which may be sealed or unsealed.

[0116] The shell 11 is a component for accommodating the electrode assembly 2. The shell 11 may be a hollow structure with an opening formed at one end, or a hollow structure with openings formed at opposite ends. The shell 11 may be in various shapes, such as a cylindrical shape, a rectangular parallelepiped shape, etc. The material of the shell 11 may be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. The electrode assembly 2 may be partially located in the shell 11, or may be completely located in the shell 11.

[0117] The end cap 12 and the shell 11 together define a receiving space for accommodating the electrode assembly 2 and other components. The end cap 12 can be connected to the shell 11 by welding, crimping, etc. to close the opening of the shell 11. The shape of the end cap 12 can be adapted to the shape of the shell 11. For example, the shell 11 is a rectangular parallelepiped structure, and the end cap 12 is a rectangular plate structure adapted to the shell 11. For another example, the shell 11 is a cylindrical structure, and the end cap 12 is a circular plate structure adapted to the shell 11. The material of the end cap 12 can also be a variety of materials, such as copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cap 12 and the shell 11 can be the same or different.

[0118] In the embodiment where the housing 11 is opened at one end, one end cap 12 may be provided. In the embodiment where the housing 11 is opened at two opposite ends, two end caps 12 may be provided, and the two end caps 12 respectively close the two openings of the housing 11, and the two end caps 12 and the housing 11 together define a receiving space.

[0119] In some embodiments, the battery cell 10 may further include an electrode terminal 3, which is disposed on the housing 1 and is used to electrically connect to the tab of the electrode assembly 2 to input or output the electrical energy of the battery cell 10. The electrode terminal 3 may be disposed on the shell 11 of the housing 1 or on the end cover 12 of the housing 1. The electrode terminal 3 may be directly connected to the tab, for example, the electrode terminal 3 is welded to the tab. The electrode terminal 3 may also be indirectly connected to the tab, for example, the electrode terminal 3 is indirectly connected to the tab through a current collecting member. The current collecting member may be a metal conductor, for example, copper, iron, aluminum, steel, aluminum alloy, etc.

[0120] As an example, Figure 3As shown, an opening is formed at one end of the shell 11, and there is one end cap 12 in the shell 1, and one end cap 12 closes one opening of the shell 11. Two electrode terminals 3 are arranged on the end cap 12, and the two electrode terminals 3 are respectively a positive electrode terminal and a negative electrode terminal. A positive electrode tab and a negative electrode tab are formed at one end of the electrode assembly 2 facing the end cap 12, and the positive electrode terminal is electrically connected to the positive electrode tab, and the negative electrode terminal is electrically connected to the negative electrode tab.

[0121] Please refer to Figure 4-Figure 6 , Figure 4 An exploded view of a battery device 100 provided in some other embodiments of the present application; Figure 5 An assembly diagram of a connector 30 and a first thermal management component 40 provided for some embodiments of the present application; Figure 6 for Figure 5 AA cross-sectional view. The embodiment of the present application provides a battery device 100, including a housing 20, a battery cell 10, a connector 30 and a first thermal management component 40. The battery cell 10 is accommodated in the housing 20. The connector 30 includes a connection seat 301 and a connection terminal 302, the connection seat 301 is connected to the housing 20, the connection terminal 302 is arranged on the connection seat 301, and the connection terminal 302 is electrically connected to the battery cell 10. The first thermal management component 40 has a first flow channel 401, and the first flow channel 401 is used to accommodate a fluid medium to manage the temperature of the connection terminal 302.

[0122] The connection base 301 is connected to the box body 20 so that the positions of the connection base 301 and the box body 20 are relatively stable. The connection base 301 and the box body 20 may be directly connected, for example, the connection base 301 and the box body 20 are snap-fitted; or the connection base 301 and the box body 20 may be indirectly connected, for example, the connection base 301 is bonded to the box body 20 through an adhesive layer. The connection base 301 may be made of an insulating material, such as polyimide, nylon, polycarbonate, etc.; the connection base 301 may also be made of a metal material, such as copper, iron, aluminum, steel, aluminum alloy, etc.; wherein, when the connection base 301 is made of a metal material, an insulating component may be provided between the connection base 301 and the connection terminal 302, for example, an insulating sleeve is provided between the connection base 301 and the connection terminal 302.

[0123] The connection terminal 302 is arranged on the connection seat 301 so that the positions of the connection terminal 302 and the connection seat 301 are relatively fixed. The connection terminal 302 and the connection seat 301 may be connected by snap connection, pin connection or fasteners, for example, the fastener is a rivet, and the connection terminal 302 is fixed to the connection seat 301 by the rivet. The connection terminal 302 is electrically connected to the battery cell 10, and the battery cell 10 is connected to an external electrical device through the connection terminal 302 to realize the input or output of electrical energy of the battery cell 10. The connection terminal 302 can be a metal conductor, such as gold, silver, copper, iron, aluminum, steel, aluminum alloy, etc. There may be multiple connection terminals 302 and connection seat 301, and the connection terminals 302 and the connection seat 301 correspond one to one; or multiple connection terminals 302 may be arranged on one connection seat 301, for example, there are two connection terminals 302, and the two connection terminals 302 are arranged on one connection seat 301.

[0124] The first thermal management component 40 has a first flow channel 401. The fluid medium can flow in the first flow channel 401 and perform heat exchange with the first thermal management component 40 to adjust the temperature of the first thermal management component 40. The first thermal management component 40 performs heat exchange with the connection terminal 302 to achieve the first thermal management component 40 managing the temperature of the connection terminal 302. The temperature of the fluid medium can be higher than the temperature of the connection terminal 302, so that the temperature of the connection terminal 302 is increased by the first thermal management component 40 when the temperature of the connection terminal 302 is too low; or the temperature of the fluid medium can be lower than the temperature of the connection terminal 302, so that the temperature of the connection terminal 302 is reduced by the first thermal management component 40 when the temperature of the connection terminal 302 is too high. The fluid medium can be a gas, such as air; the fluid medium can also be a liquid, such as water, ethylene glycol aqueous solution, etc.

[0125] The minimum distance between the first thermal management component 40 and the connection terminal 302 may be 0-10 mm. The first thermal management component 40 may be in contact with the connection terminal 302, and the first thermal management component 40 and the connection terminal 302 may perform heat exchange through the contact portion thereof, so that the first thermal management component 40 manages the temperature of the connection terminal 302. The first thermal management component 40 and the connection terminal 302 may also be spaced apart. The first thermal management component 40 and the connection terminal 302 may perform heat exchange through other units as intermediate media, so that the first thermal management component 40 manages the temperature of the connection terminal 302; wherein the other units may be air or heat-conducting components, etc.

[0126] In the embodiment of the present application, the connection terminal 302 is electrically connected to the battery cell 10, and the battery cell 10 realizes the input or output of electric energy through the connection terminal 302. By setting a first thermal management component 40 with a first flow channel 401 to manage the temperature of the connection terminal 302, the fluid medium in the first flow channel 401 can exchange heat with the first thermal management component 40, and the first thermal management component 40 can exchange heat with the connection terminal 302, thereby realizing heat exchange between the fluid medium in the first flow channel 401 and the connection terminal 302, and then realizing the management of the temperature of the connection terminal 302, reducing the risk of temperature imbalance of the connection terminal 302, so that the connection terminal 302 can provide stable electric energy input or output for the battery cell 10, and improving the reliability of the battery device 100.

[0127] In some embodiments, please refer to Figure 5-Figure 7 , Figure 7 for Figure 5 The first flow channel 401 is arranged around the connecting terminal 302 .

[0128] The connection terminal 302 may be one or more. In the embodiment where there is one connection terminal 302, the first flow channel 401 surrounds at least a portion of the connection terminal 302, so that the first flow channel 401 is arranged around the connection terminal 302. In the embodiment where there are multiple connection terminals 302, the first flow channel 401 may be arranged around the multiple connection terminals 302 respectively, or the first flow channel 401 may surround the circumference of the multiple connection terminals 302, so that the first flow channel 401 is arranged around the multiple connection terminals 302.

[0129] In this embodiment, the first flow channel 401 surrounding the connecting terminal 302 can absorb the heat of the connecting terminal 302 in the circumference or supply heat to the connecting terminal 302 from the circumference of the connecting terminal 302, thereby improving the heat exchange efficiency of the first thermal management component 40 and reducing the risk of damage to the connecting terminal 302 due to temperature imbalance.

[0130] In some embodiments, please refer to Figure 5-Figure 7 The first thermal management component 40 is provided with a through hole 402, and the through hole 402 penetrates the first thermal management component 40 along the extension direction X of the connection terminal. The first thermal management component 40 is located on one side of the connection seat 301, and the connection terminal 302 is penetrated by the through hole 402 and partially extends out of the first thermal management component 40 in a direction away from the connection seat 301. The first flow channel 401 is arranged around the through hole 402.

[0131] In the embodiment with one connection terminal 302, one connection terminal 302 is inserted into the through hole 402. In the embodiment with multiple connection terminals 302, multiple connection terminals 302 may be inserted into one through hole 402; or the connection terminals 302 and the through holes 402 may correspond to each other one by one, and each connection terminal 302 may be inserted into one through hole 402.

[0132] Along the extension direction X of the connecting terminal, the connecting terminal 302 has a first end 3021 and a second end 3022 relative to each other, and the first end 3021 and the second end 3022 of the connecting terminal 302 are respectively located on both sides of the through hole 402, and the connecting terminal 302 is penetrated through the through hole 402 so that the through hole 402 is arranged around a part of the connecting terminal 302, and the first flow channel 401 is arranged around the through hole 402 so that the first flow channel 401 is arranged around a part of the connecting terminal 302.

[0133] In this embodiment, the connection terminal 302 is arranged to pass through the through hole 402, and the first flow channel 401 is arranged around the through hole 402, so that the first flow channel 401 can be arranged around the connection terminal 302, thereby realizing the temperature management of the connection terminal 302 by the first thermal management component 40. The through hole 402 can also cover a part of the connection terminal 302, reducing the risk of short circuit between the connection terminal 302 and other components.

[0134] In some embodiments, please refer to Figure 7 The connection base 301 is provided with a plurality of connection terminals 302 , and there are a plurality of through holes 402 , and the through holes 402 correspond to the connection terminals 302 one by one; and the first flow channel 401 is provided around the plurality of through holes 402 .

[0135] The through holes 402 correspond to the connection terminals 302 one by one, so that each connection terminal 302 is correspondingly arranged in one through hole 402. In some embodiments, the first flow channel 401 includes an annular flow channel, and the annular flow channel is arranged around the multiple through holes 402. The first flow channel 401 surrounds the multiple through holes 402, so that when the fluid medium flows in the first flow channel 401, the fluid medium can flow around the multiple through holes 402, and the through holes 402 correspond to the connection terminals 302 one by one, thereby realizing heat exchange between the fluid medium and the connection terminals 302, and improving the heat exchange effect between the fluid medium and the connection terminals 302.

[0136] In this embodiment, by arranging the first flow channel 401 around the plurality of through holes 402 , the fluid medium in the first flow channel 401 can manage the temperature of the connection terminals 302 inserted in the plurality of through holes 402 , thereby reducing the difficulty of arranging the first flow channel 401 .

[0137] In some embodiments, the connection seat 301 is provided with multiple connection terminals 302 and multiple through holes 402 , and the through holes 402 correspond one to one with the connection terminals 302 ; the first flow channel 401 includes multiple annular flow channels interconnected, and each annular flow channel is arranged around a through hole 402 .

[0138] Each annular flow channel is disposed around a through hole 402 , and each through hole 402 is penetrated by a connecting terminal 302 , so that each annular flow channel is disposed around a portion of a connecting terminal 302 .

[0139] In this embodiment, by arranging each annular flow channel around a through hole 402, the wrapping effect of the annular flow channel on the connecting terminal 302 can be improved, thereby improving the temperature control effect of the first thermal management component 40 on the connecting terminal 302 and reducing the risk of damage to the connecting terminal 302 due to temperature imbalance.

[0140] In some embodiments, please refer to Figure 8 , Figure 8 The battery device 100 further includes a heat conducting member 50 , at least part of which is located in the through hole 402 and connects the hole wall surface of the through hole 402 and the connection terminal 302 .

[0141] The entire heat conductor 50 may be located in the through hole 402; or only a portion of the heat conductor 50 may be located in the through hole 402, and the other portion may be located outside the through hole 402. The heat conductor 50 and the connection terminal 302 may fill the through hole 402, or only a portion of the through hole 402 may be filled by the heat conductor 50 and the connection terminal 302. The heat conductor 50 connects the hole wall of the through hole 402 and the connection terminal 302, so that the connection terminal 302 and the first thermal management component 40 can exchange heat through the heat conductor 50, thereby improving the heat exchange efficiency between the connection terminal 302 and the first thermal management component 40.

[0142] In this embodiment, the heat conductor 50 can conduct heat between the first thermal management component 40 and the connection terminal 302 , thereby improving the heat conduction effect between the first thermal management component 40 and the connection terminal 302 and improving the performance of the connector 30 .

[0143] In some embodiments, the heat conductive member 50 includes heat conductive glue.

[0144] At least part of the thermal conductive adhesive is located in the through hole 402 , and the thermal conductive adhesive connects the hole wall surface of the through hole 402 and the connecting terminal 302 , so that the connecting terminal 302 and the first thermal management component 40 perform heat exchange through the thermal conductive adhesive.

[0145] In this embodiment, by configuring the heat-conducting member 50 to include heat-conducting glue, the difficulty of configuring the heat-conducting member 50 is reduced, and the configuration of the heat-conducting member 50 is more convenient and has lower costs.

[0146] In some embodiments, please refer to Figure 5-Figure 7 The connection terminal 302 is inserted into the connection base 301. The connection base 301 has a first surface 3011 along the extension direction X of the connection terminal. The first surface 3011 is provided with a convex portion 3012. The convex portion 3012 is arranged around the connection terminal 302. The connection terminal 302 extends out of the convex portion 3012 in a direction away from the first surface 3011. The convex portion 3012 is at least partially accommodated in the through hole 402.

[0147] The convex portion 3012 is arranged around the connection terminal 302 so that the convex portion 3012 can limit the position of the connection terminal 302, making the position of the connection terminal 302 more stable. The convex portion 3012 is arranged around the connection terminal 302, and at least part of the convex portion 3012 is accommodated in the through hole 402, so that the connection terminal 302 and the first thermal management component 40 can exchange heat through the convex portion 3012, thereby improving the heat exchange efficiency between the connection terminal 302 and the first thermal management component 40. The convex portion 3012 may be fully accommodated in the through hole 402, or only part of the convex portion 3012 may be accommodated in the through hole 402.

[0148] In this embodiment, by setting the convex portion 3012 around the connection terminal 302, the convex portion 3012 can improve the connection strength between the connection terminal 302 and the connection seat 301. The convex portion 3012 is at least partially accommodated in the through hole 402, so that the first flow channel 401 is set around the convex portion 3012, so that the first thermal management component 40 can absorb the heat of the connection terminal 302 through the convex portion 3012 or conduct heat to the connection terminal 302 through the convex portion 3012, thereby improving the heat conduction efficiency between the first thermal management component 40 and the connection terminal 302, and improving the performance of the connector 30.

[0149] In some embodiments, please refer to Figure 5-Figure 7 There is a gap 4021 between the protrusion 3012 and the wall surface of the through hole 402 .

[0150] The through hole 402 is disposed around at least a portion of the protrusion 3012 , and a gap 4021 is formed between the protrusion 3012 and the wall surface of the through hole 402 , which means that the protrusion 3012 and the wall surface of the through hole 402 are not in contact.

[0151] In this embodiment, the gap 4021 between the recess and the wall surface of the through hole 402 can reduce the difficulty of assembling the first heat management component 40 and the connector 30 .

[0152] In some embodiments, the protrusion 3012 contacts the wall surface of the through hole 402 .

[0153] The protrusion 3012 contacts the hole wall surface of the through hole 402 so that the outer peripheral surface of the protrusion 3012 abuts against the hole wall surface of the through hole 402, so that the connection terminal 302 and the first thermal management component 40 can exchange heat through the protrusion 3012, thereby improving the heat exchange efficiency between the connection terminal 302 and the first thermal management component 40.

[0154] In this embodiment, the contact between the recess and the wall surface of the through hole 402 can improve the heat conduction efficiency between the first thermal management component 40 and the connecting terminal 302 , thereby enhancing the performance of the connector 30 .

[0155] In some embodiments, please refer to Fig. 9 and Fig.10 , Fig. 9 for Figure 8 CC section view; Fig.10 for Fig. 9 The battery device 100 further includes a heat conducting member 50 , at least a portion of which is located in the through hole 402 and connects the protrusion 3012 and the wall surface of the through hole 402 .

[0156] The entire heat conducting member 50 may be located in the through hole 402, or only a portion of the heat conducting member 50 may be located in the through hole 402. The heat conducting member 50 connects the protrusion 3012 and the wall of the through hole 402, so that the protrusion 3012 and the first thermal management component 40 can exchange heat through the heat conducting member 50.

[0157] At least a portion of the heat conducting member 50 is located between the protrusion 3012 and the wall surface of the through hole 402 . The protrusion 3012 is disposed around the connecting terminal 302 , so that at least a portion of the heat conducting member 50 is disposed around the connecting terminal 302 .

[0158] In this embodiment, the heat conducting member 50 can improve the heat conduction efficiency between the protrusion 3012 and the first heat management component 40 , thereby improving the performance of the connector 30 .

[0159] In some embodiments, a portion of the heat conductive member 50 connects the protrusion 3012 and the wall surface of the through hole 402 , and another portion of the heat conductive member 50 connects the wall surface of the through hole 402 and the connection terminal 302 .

[0160] In some embodiments, the first thermal management component 40 is connected to the connection socket 301 .

[0161] The first thermal management component 40 and the connection seat 301 may be connected by hot melt, bonding, clamping, fasteners, etc., wherein the fasteners may be pins.

[0162] In this embodiment, by setting the first thermal management component 40 to be connected to the connecting seat 301, on the one hand, the position between the first thermal management component 40 and the connecting seat 301 is more stable, which facilitates the assembly of the first thermal management component 40; on the other hand, heat can be conducted between the first thermal management component 40 and the connecting terminal 302 through the connecting seat 301, thereby improving the heat conduction efficiency between the first thermal management component 40 and the connecting terminal 302.

[0163] In some embodiments, the first thermal management component 40 is connected to the connection socket 301 by thermal melting.

[0164] One end of the first thermal management component 40 close to the connecting seat 301 may be heated to partially hot-melt and then abut against the first surface 3011, so as to fix the first thermal management component 40 to the connecting seat 301, thereby realizing the hot-melt connection between the first thermal management component 40 and the connecting seat 301; one end of the connecting seat 301 with the first surface 3011 may be heated to partially hot-melt and then abut against the first thermal management component 40, so as to fix the first thermal management component 40 to the connecting seat 301, thereby realizing the hot-melt connection between the first thermal management component 40 and the connecting seat 301; one end of the first thermal management component 40 close to the connecting seat 301 and one end of the connecting seat 301 with the first surface 3011 may be partially hot-melt and then abut against each other, so as to fix the first thermal management component 40 to the connecting seat 301, thereby realizing the hot-melt connection between the first thermal management component 40 and the connecting seat 301.

[0165] In this embodiment, the first thermal management component 40 is connected to the connection base 301 by thermal melting, which reduces the difficulty of assembling the first thermal management component 40 and the connection base 301 and reduces the processing cost of the battery device 100 .

[0166] In some embodiments, please refer to Fig.11 , Fig.11 The schematic diagram of the structure of the battery device 100 provided in some embodiments of the present application. The battery device 100 further includes a second thermal management component 60, which is accommodated in the box body 20 and has a second flow channel 601, which is used to accommodate a fluid medium to manage the temperature of the battery cell 10. The first flow channel 401 is connected to the second flow channel 601.

[0167] The second thermal management component 60 has a second flow channel 601. The first flow channel 401 can accommodate and flow a flow medium to adjust the temperature of the second thermal management component 60. The second thermal management component 60 and the battery cell 10 perform heat exchange to achieve the second thermal management component 60 managing the temperature of the battery cell 10. The temperature of the fluid medium can be higher than the temperature of the battery cell 10, so that the temperature of the battery cell 10 is increased by the second thermal management component 60 when the temperature of the battery cell 10 is too low. The temperature of the fluid medium can also be lower than the temperature of the battery cell 10, so that the temperature of the battery cell 10 is reduced by the second thermal management component 60 when the temperature of the battery cell 10 is too high. For example, the second thermal management component 60 is a water cooling plate. The fluid medium can be air, water, ethylene glycol aqueous solution, etc.

[0168] A thermal management module may be provided outside the battery device 100, and the thermal management module may provide fluid medium to the first flow channel 401 and the second flow channel 601, and recover the fluid medium flowing through the first flow channel 401 and the second flow channel 601. The fluid medium flowing out of the thermal management module may flow into the first flow channel 401 and the second flow channel 601 respectively through pipelines, and the first flow channel 401 and the second flow channel 601 are connected through pipelines; the fluid medium flowing out of the thermal management module may first flow through the first flow channel 401 and then flow into the second flow channel 601; or the fluid medium flowing out of the thermal management module may first flow through the second flow channel 601 and then flow into the first flow channel 401.

[0169] In this embodiment, the fluid medium can flow in the first flow channel 401 and the second flow channel 601 to achieve temperature control of the connector 30 and the battery cell 10 , reduce the risk of temperature imbalance between the connector 30 and the battery cell 10 , and improve the reliability of the battery device 100 .

[0170] In some embodiments of the present application, the thermal management module includes a pumping device, a first heat exchanger, a compressor, a throttling device, and a second heat exchanger. The pumping device, the first heat exchanger, the thermal management component, and the pumping device are sequentially connected to form a cooling circulation loop, and the compressor, the second heat exchanger, the throttling device, the first heat exchanger, and the compressor are sequentially connected to form a refrigerant circulation loop. The components of the thermal management module are independent of the battery device 100, reducing the risk of mutual interference between the thermal management module and the battery device 100.

[0171] The thermal management module comprises a pumping device and a first heat exchanger. The pumping device, the first heat exchanger, the thermal management component and the pumping device are connected in sequence to form a coolant circulation loop.

[0172] It should be noted that the pumping device (also known as a water pump) is a component used to transport the coolant (fluid medium). The first heat exchanger is a component used to perform heat exchange with the coolant flowing therethrough. The first heat exchanger may be, but is not limited to, a plate heat exchanger, a shell and tube heat exchanger, an air cooler, a spiral plate heat exchanger, a heat exchange tube bundle, etc. The coolant may be, but is not limited to, a mixture of ethylene glycol and water, etc.

[0173] Under the conveying action of the pumping device, the coolant can circulate in the coolant circulation loop and circulate through the pumping device, the first heat exchanger, the thermal management component, and the pumping device. The above connection can be a direct connection or an indirect connection via a pipeline.

[0174] By adopting the above scheme, the coolant can circulate through the thermal management component to directly exchange heat with the battery cell 10 to cool the battery cell 10; the coolant after heat exchange with the battery cell 10 can also circulate through the first heat exchanger and exchange heat with the first heat exchanger, and heat exchange the heat exchanged from the battery cell 10 to the first heat exchanger, so that the coolant is cooled.

[0175] In some embodiments of the present application, the thermal management module further includes a compressor, a throttling device, and a second heat exchanger. The compressor, the second heat exchanger, the throttling device, the first heat exchanger, and the compressor are sequentially connected to form a refrigerant circulation loop.

[0176] It should be noted that the above connection can be a direct connection or an indirect connection via a pipeline. The compressor is a component that provides power for the refrigerant circulation and can cool the refrigerant. The throttling device is a component used for cooling and reducing pressure. The throttling device can be but is not limited to a throttle valve, an expansion valve, etc. The second heat exchanger is a component used for heat exchange with the refrigerant flowing therethrough. The second heat exchanger can be but is not limited to a plate heat exchanger, a shell and tube heat exchanger, an air cooler, a spiral plate heat exchanger, a heat exchange tube bundle, etc. The refrigerant has a low boiling point and evaporation heat, can evaporate and condense at a relatively low temperature, and can achieve a refrigeration effect by absorbing and releasing heat. The refrigerant can be but is not limited to Freon, ammonia, carbon dioxide, R134A (1,1,1,2-tetrafluoroethane), R410A (Freon R-410A refrigerant), etc.

[0177] Among them, the first heat exchanger is arranged in both the coolant circulation loop and the first refrigerant circulation loop. The first heat exchanger is provided with a coolant flow channel and a refrigerant flow channel inside. The coolant flow channel participates in forming the coolant circulation loop, and the coolant flow channel is used for the coolant to flow therein. The refrigerant flow channel participates in forming the first refrigerant circulation loop, and the refrigerant flow channel is used for the refrigerant to flow therein. The coolant flow channel and the refrigerant flow channel are not connected to each other so that the coolant and the refrigerant are not mixed. In the first heat exchanger, the coolant and the refrigerant can be heat-exchanged, and in particular, the heat of the coolant can be heat-exchanged with the refrigerant, so that the first heat exchanger can cool the coolant flowing therethrough.

[0178] The thermal management module also includes a heat dissipation fan, which dissipates heat for the second heat exchanger.

[0179] In some embodiments, please refer to Fig.12 , Fig.12 Schematic diagram of the structure of the first flow channel 401 and the second flow channel 601 provided in some embodiments of the present application. The first flow channel 401 has a first inlet 4011 and a first outlet 4012, and the second flow channel 601 has a second inlet 6011 and a second outlet 6012. The first inlet 4011 is connected to the second inlet 6011, and the first outlet 4012 is connected to the second outlet 6012, so that the first flow channel 401 and the second flow channel 601 are connected.

[0180] The first inlet 4011 is used to flow the fluid medium into the first flow channel 401, and the first outlet 4012 is used to discharge the fluid medium in the first flow channel 401. The second inlet 6011 is used to flow the fluid medium into the second flow channel 601, and the second outlet 6012 is used to discharge the fluid medium in the second flow channel 601. The first inlet 4011 and the second inlet 6011 are connected, so that the fluid medium can flow into the first inlet 4011 and the second inlet 6011 respectively. The first outlet 4012 and the second outlet 6012 are connected, so that the fluid medium flowing out of the first outlet 4012 and the fluid medium flowing out of the second outlet 6012 can be merged together to facilitate the centralized outflow of the fluid medium. The first flow channel 401 can flow the fluid medium only through the first inlet 4011; or the first flow channel 401 also has a third inlet, and the first channel can also flow the fluid medium through the third inlet.

[0181] In this embodiment, the first flow channel 401 and the second flow channel 601 are connected in parallel, so that the temperature of the fluid medium flowing through the first thermal management component 40 is the same as the temperature of the fluid medium flowing through the second thermal management component 60, thereby reducing the impact of the temperature imbalance of one of the connector 30 and the battery cell 10 on the other, thereby improving the reliability of the battery device 100.

[0182] In some embodiments, please refer to Fig.13 , Fig.13The schematic diagram of the structure of the first flow channel 401 and the second flow channel 601 provided in some embodiments of the present application. The first flow channel 401 has a first inlet 4011 and a first outlet 4012, and the second flow channel 601 has a second inlet 6011 and a second outlet 6012. The first outlet 4012 is connected to the second inlet 6011 to achieve communication between the first flow channel 401 and the second flow channel 601.

[0183] The first outlet 4012 is connected to the second inlet 6011 , so that the fluid medium in the first flow channel 401 can flow out of the first outlet 4012 and then flow into the second flow channel 601 through the second inlet 6011 .

[0184] In this embodiment, the fluid medium of the first thermal management component 40 flows into the second thermal management component 60, which facilitates the circulation of the fluid medium in the first thermal management component 40 and the second thermal management component 60, reduces the difficulty of setting the first thermal management component 40 and the second thermal management component 60, and reduces the setting cost of the first thermal management component 40 and the second thermal management component 60.

[0185] In some embodiments, please refer to Fig.14 and Fig.15 , Fig.14 An assembly diagram of a connection base 301 and a first thermal management component 40 provided in some embodiments of the present application; Fig.15 for Fig.14 The connection seat 301 has a third flow channel 3013 , the third flow channel 3013 is connected to the first flow channel 401 , and the third flow channel 3013 is used to provide the first flow channel 401 with a fluid medium.

[0186] The third flow channel 3013 of the connection seat 301 is connected to the first flow channel 401 , so that the third flow channel 3013 and the first flow channel 401 can exchange fluid medium. The fluid medium flowing out of the third flow channel 3013 can flow into the first flow channel 401 .

[0187] In this embodiment, on the one hand, by providing the third flow channel 3013, the fluid medium can be introduced into the first thermal management component 40 through the connection seat 301, which reduces the path of the fluid medium introduced into the first thermal management component 40 and reduces the difficulty of conducting the fluid medium. On the other hand, the fluid medium can manage the temperature of the connection seat 301 and reduce the risk of damage to the connection seat 301.

[0188] In some embodiments, the first surface 3011 of the connecting seat 301 is arranged to face the interior of the box body 20, and the third flow channel 3013 has an inlet, which is arranged on the side of the connecting seat 301 away from the first surface 3011 and exposed to the outside of the box body 20, thereby facilitating the introduction of fluid medium from the outside of the box body 20 into the third flow channel 3013.

[0189] In some embodiments, please refer to Fig.16 , Fig.16 The schematic diagram of the structure of the connection seat 301, the first thermal management component 40 and the second thermal management component 60 provided in some embodiments of the present application. The battery device 100 also includes the second thermal management component 60, which is accommodated in the box body 20, and the second thermal management component 60 has a second flow channel 601, and the second flow channel 601 is used to accommodate a fluid medium to manage the temperature of the battery cell 10; the first flow channel 401 connects the second flow channel 601 and the third flow channel 3013.

[0190] The first flow channel 401 is connected to the second flow channel 601 and the third flow channel 3013 , so that the fluid medium flows through the third flow channel 3013 , the first flow channel 401 , and the second flow channel 601 in sequence.

[0191] In this embodiment, the fluid medium is introduced into the first thermal management component 40 and the second thermal management component 60 through the connecting seat 301, which reduces the difficulty of conducting the fluid medium and reduces the installation cost of the first thermal management component 40 and the second thermal management component 60.

[0192] An embodiment of the present application provides an electrical device, including the battery device 100 provided in any one of the above embodiments.

[0193] Please continue to refer to Figure 4-Figure 10The embodiment of the present application provides a battery device 100, including a housing 20, a battery cell 10, a connector 30, a first thermal management component 40 and a heat conductor 50. The battery cell 10 is accommodated in the housing 20. The connector 30 includes a connection seat 301 and a connection terminal 302, the connection seat 301 is connected to the housing 20, the connection terminal 302 is arranged on the connection seat 301, and the connection terminal 302 is electrically connected to the battery cell 10. The first thermal management component 40 has a first flow channel 401, and the first flow channel 401 is used to accommodate a fluid medium to manage the temperature of the connection terminal 302. The first thermal management component 40 is provided with a through hole 402, along the extension direction X of the connection terminal, the through hole 402 penetrates the first thermal management component 40, the first thermal management component 40 is located on one side of the connection seat 301, the connection terminal 302 is penetrated in the through hole 402, and partially extends out of the first thermal management component 40 in a direction away from the connection seat 301, and the first flow channel 401 is arranged around the through hole 402. A portion of the heat conducting member 50 is located in the through hole 402 and connects the hole wall surface of the through hole 402 and the connecting terminal 302. The connecting terminal 302 is arranged in the connecting seat 301, and the connecting seat 301 has a first surface 3011 along the extension direction X of the connecting terminal. The first surface 3011 is provided with a convex portion 3012, and the convex portion 3012 is arranged around the connecting terminal 302. The connecting terminal 302 extends out of the convex portion 3012 in a direction away from the first surface 3011, and the convex portion 3012 is at least partially accommodated in the through hole 402. Another portion of the heat conducting member 50 is located in the through hole 402 and connects the convex portion 3012 and the hole wall surface of the through hole 402.

[0194] In this embodiment, the connection terminal 302 is electrically connected to the battery cell 10, and the battery cell 10 realizes the input or output of electric energy through the connection terminal 302. By setting a first thermal management component 40 with a first flow channel 401 to manage the temperature of the connection terminal 302, the fluid medium in the first flow channel 401 can exchange heat with the first thermal management component 40, and the first thermal management component 40 can exchange heat with the connection terminal 302, thereby realizing the heat exchange between the fluid medium in the first flow channel 401 and the connection terminal 302, and then realizing the management of the temperature of the connection terminal 302, reducing the risk of temperature imbalance of the connection terminal 302, so that the connection terminal 302 can provide stable electric energy input or output for the battery cell 10, and improving the reliability of the battery device 100. By setting the connection terminal 302 to penetrate the through hole 402, and the first flow channel 401 to be arranged around the through hole 402, the first flow channel 401 can be arranged around the connection terminal 302, so that the first thermal management component 40 can realize the temperature management of the connection terminal 302. The through hole 402 can also cover a part of the connection terminal 302, reducing the risk of short circuit between the connection terminal 302 and other components. The heat conductor 50 can conduct the heat between the first thermal management component 40 and the connection terminal 302, improve the heat conduction effect between the first thermal management component 40 and the connection terminal 302, and improve the performance of the connector 30. By setting the convex portion 3012 around the connection terminal 302, the convex portion 3012 can improve the connection strength between the connection terminal 302 and the connection seat 301. The convex portion 3012 is at least partially accommodated in the through hole 402, so that the first flow channel 401 is arranged around the convex portion 3012, so that the first thermal management component 40 can absorb the heat of the connection terminal 302 through the convex portion 3012 or conduct heat to the connection terminal 302 through the convex portion 3012, improve the heat conduction efficiency between the first thermal management component 40 and the connection terminal 302, and improve the performance of the connector 30. The heat conducting member 50 can improve the heat conduction efficiency between the protrusion 3012 and the first heat management component 40 , thereby improving the performance of the connector 30 .

[0195] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0196] The above embodiments are only used to illustrate the technical solution of the present application and are not used to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: Box; A battery cell is contained in the box; A connector, comprising a connection seat and a connection terminal, wherein the connection seat is connected to the box body, the connection terminal is arranged on the connection seat, and the connection terminal is electrically connected to the battery cell; The first heat management component has a first flow channel, wherein the first flow channel is used to accommodate a fluid medium to manage the temperature of the connection terminal.

2. The battery device according to claim 1, characterized in that The first flow channel is arranged around the connecting terminal.

3. The battery device according to claim 1, characterized in that: The first thermal management component is provided with a through hole, and the through hole penetrates the first thermal management component along the extension direction of the connecting terminal. The first thermal management component is located on one side of the connecting seat, and the connecting terminal is passed through the through hole and partially extends out of the first thermal management component in a direction away from the connecting seat, and the first flow channel is arranged around the through hole.

4. The battery device according to claim 3, characterized in that: The connection seat is provided with a plurality of the connection terminals, and the through holes are multiple, and the through holes correspond to the connection terminals one by one; The first flow channel is arranged around the plurality of through holes; or the first flow channel includes a plurality of annular flow channels that are interconnected, and each of the annular flow channels is arranged around one of the through holes.

5. The battery device according to claim 3, characterized in that: The battery device further includes a heat conducting member, at least a portion of which is located in the through hole and connects the connection terminal and a hole wall surface of the through hole.

6. The battery device according to claim 5, characterized in that The heat conducting member comprises heat conducting glue.

7. The battery device according to claim 3, characterized in that: The connecting terminal is passed through the connecting seat, and the connecting seat has a first surface along the extension direction of the connecting terminal. The first surface is provided with a convex portion, and the convex portion is arranged around the connecting terminal. The connecting terminal extends out of the convex portion in a direction away from the first surface, and the convex portion is at least partially accommodated in the through hole.

8. The battery device according to claim 7, characterized in that: A gap exists between the protrusion and the hole wall surface of the through hole.

9. The battery device according to claim 7, characterized in that: The protrusion contacts a hole wall surface of the through hole.

10. The battery device according to claim 7, characterized in that: The battery device further includes a heat conducting member, at least a portion of which is located in the through hole and connects the protrusion and a hole wall surface of the through hole.

11. The battery device according to any one of claims 1 to 10, characterized in that: The first heat management component is connected to the connection seat.

12. The battery device according to claim 11, characterized in that The first heat management component is connected to the connection seat by thermal melting.

13. The battery device according to any one of claims 1 to 10, characterized in that: The battery device further includes a second thermal management component, which is accommodated in the box body and has a second flow channel, and the second flow channel is used to accommodate the fluid medium to manage the temperature of the battery cell; The first flow channel is communicated with the second flow channel.

14. The battery device according to claim 13, characterized in that: The first flow channel has a first inlet and a first outlet, the second flow channel has a second inlet and a second outlet, the first inlet is connected to the second inlet, and the first outlet is connected to the second outlet, so that the first flow channel and the second flow channel are connected.

15. The battery device according to claim 13, characterized in that: The first flow channel has a first inlet and a first outlet, the second flow channel has a second inlet and a second outlet, and the first outlet is connected to the second inlet to achieve communication between the first flow channel and the second flow channel.

16. The battery device according to any one of claims 1 to 10, characterized in that: The connecting seat has a third flow channel, the third flow channel is communicated with the first flow channel, and the third flow channel is used to provide the fluid medium to the first flow channel.

17. The battery device according to claim 16, characterized in that: The battery device further includes a second thermal management component, which is accommodated in the box body and has a second flow channel, and the second flow channel is used to accommodate the fluid medium to manage the temperature of the battery cell; The first flow channel communicates with the second flow channel and the third flow channel.

18. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1-17.

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