Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment. The battery device comprises a box body, a battery monomer and a heat exchange assembly, the box body is provided with a containing cavity and comprises a first wall. The battery monomer is arranged in the accommodating cavity and comprises an end cover, and an electrode terminal is arranged on the end cover. The heat exchange assembly and the first wall are arranged in a stacked mode, the heat exchange assembly is arranged on the side, facing the battery single bodies, of the first wall, and a heat exchange flow channel is formed in the heat exchange assembly. And the heat exchange assembly is at least partially attached to the end cover so as to exchange heat with the battery monomers. According to the technical scheme, the heat dissipation efficiency of the battery device can be improved, and the operation stability of the battery device is improved.

Description

Technical Field

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

[0002] With the development of new energy technology, batteries are used more and more widely, such as in mobile phones, laptops, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric tools, etc.

[0003] The development of battery technology must take into account many design factors at the same time. How to improve the heat dissipation efficiency during the operation of the battery device and improve the stability of battery operation is also a research direction in the battery field. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which can improve the heat dissipation efficiency of the battery device and improve the stability of the operation of the battery device.

[0005] In a first aspect, the present application provides a battery device, including a box, a battery cell, and a heat exchange assembly. The box has a housing, and the box includes a first wall. The battery cell is arranged in the housing, and the battery cell includes an end cover, and the end cover is provided with an electrode terminal. The heat exchange assembly is stacked with the first wall, and the heat exchange assembly is arranged on the side of the first wall facing the battery cell, and a heat exchange flow channel is provided in the heat exchange assembly. The heat exchange assembly is at least partially attached to the end cover to exchange heat with the battery cell.

[0006] In the technical solution of the embodiment of the present application, a box is provided to provide a stable environment for the battery cell, thereby reducing the impact of external impurities and moisture on the operation of the battery cell. The battery cell will generate heat during the charging and discharging process, and the end cover is one of the parts where the heat is relatively concentrated. A heat exchange component is provided on the end cover, and the heat exchange component is bonded to the end cover, which can more directly guide the heat generated inside the battery cell. Compared with other heat dissipation methods, the heat transfer path is shorter and the heat dissipation efficiency is higher. A heat exchange flow channel is provided in the heat exchange component, which can provide a heat exchange path for the heat exchange medium, optimize the overall heat transfer path, and improve the heat exchange efficiency.

[0007] In some embodiments, a pressure relief mechanism is also provided on the end cap, and the heat exchange assembly is spaced apart from the pressure relief mechanism and the electrode terminal. In the above structure, the high-temperature and high-pressure substances in the battery cell are released in time by providing a pressure relief structure, thereby reducing the risk of combustion and explosion of the battery cell and improving the stability of the battery device during operation.

[0008] In some embodiments, the number of battery cells is multiple, and the multiple battery cells are stacked along a first direction to form a battery cell assembly. Each battery cell is provided with two electrode terminals, namely a first terminal and a second terminal. The first terminal and the second terminal are respectively arranged on two sides of the pressure relief mechanism along a second direction, and the second direction is perpendicular to the first direction. In the above structure, by increasing the number of battery cells, the energy density of the battery device is improved. And by arranging two electrode terminals on the end cover, the heat generated by the electrode terminals can also be taken away in time through the heat exchange component, improving the temperature control accuracy of the battery device.

[0009] In some embodiments, the heat exchange component includes a first heat exchange plate arranged between the first terminal and the pressure relief mechanism. The first heat exchange plate is provided with a first flow channel extending along the first direction, and the first flow channel corresponds to the battery cell assembly. In the above structure, by arranging the first flow channel in the first heat exchange plate, the heat generated during the operation of the first terminal can be taken away in time, improving the heat exchange efficiency of the heat exchange component.

[0010] In some embodiments, the heat exchange component further includes a second heat exchange plate arranged between the second terminal and the pressure relief mechanism. The second heat exchange plate is provided with a second flow channel extending along the first direction, the second flow channel corresponds to the battery cell assembly, and the second flow channel is communicated with the first flow channel. In the above structure, by arranging the second heat exchange plate, the heat exchange area of the heat exchange component is increased, and the heat generated during the operation of the second terminal can be taken away, further improving the heat exchange efficiency of the heat exchange component.

[0011] In some embodiments, the heat exchange component includes a third heat exchange plate arranged on the side of the first terminal away from the pressure relief mechanism. The third heat exchange plate is provided with a third flow channel extending along the first direction, and the third flow channel corresponds to the battery cell assembly. In the above structure, by arranging the third heat exchange plate to exchange heat in the area outside the first terminal, the space outside the end cover can be fully utilized, and the heat generated during the operation of the first terminal can be taken away in time, improving the heat exchange efficiency of the heat exchange component.

[0012] In some embodiments, the heat exchange component further includes a fourth heat exchange plate arranged on the side of the second terminal away from the pressure relief mechanism. The fourth heat exchange plate is provided with a fourth flow channel extending along the first direction, the fourth flow channel corresponds to the battery cell assembly, and the fourth flow channel is communicated with the third flow channel. In the above structure, by arranging the fourth heat exchange plate, not only the area of the heat exchange component is increased, but also the area outside the second terminal is exchanged for heat, the space outside the end cover can be fully utilized, and the heat generated during the operation of the second terminal can be taken away in time, improving the heat exchange efficiency of the heat exchange component.

[0013] In some embodiments, the battery device further includes a support plate disposed between the heat exchange component and the first wall. The surface of the support plate facing away from the first wall is connected to the electrode terminal and the heat exchange component respectively. In the above structure, the support plate can connect the heat exchange component to the battery cell, improving the accuracy of the installation position of the heat exchange component and the accuracy of the heat exchange position.

[0014] In some embodiments, the battery device further includes an electrical connection piece for connecting the electrode terminals of two adjacent battery cells. A convex portion is provided on the surface of the support plate facing the battery cell, and at least a part of the electrical connection piece abuts against the convex portion. In the above structure, by providing the electrical connection piece, two adjacent battery cells are electrically connected. The convex portion is provided on the support plate to connect the electrical connection piece to the support plate, improving the accuracy of the installation position of the heat exchange component.

[0015] In some embodiments, the battery device further includes a first adhesive member disposed between the convex portion and the electrical connection piece. By providing the first adhesive member, the connection stability between the support plate and the battery cell is improved.

[0016] In some embodiments, the battery device further includes a second adhesive member disposed between the support plate and the heat exchange component. By providing the second adhesive member, the connection stability between the support plate and the heat exchange component is improved.

[0017] In some embodiments, the battery device further includes a third adhesive member disposed between the support plate and the first wall. By providing the third adhesive member, the connection stability between the support plate and the box body is improved.

[0018] In some embodiments, the number of support plates is multiple. The multiple support plates are arranged in the second direction, and a heat dissipation channel is provided between two adjacent support plates. The heat dissipation channel extends in the first direction and corresponds to the pressure relief mechanisms of multiple battery cells. In the above structure, by providing multiple support plates corresponding to multiple battery cell assemblies, the total heat exchange area is increased, the heat exchange efficiency is improved, and the operating stability of the battery device is enhanced. Using the gap between two support plates as a pressure relief and heat dissipation channel can timely discharge the substances discharged by the pressure relief mechanism, reduce the damage caused by the pressure relief emissions to other battery cells, and at the same time quickly reduce the temperature of the battery cells.

[0019] In some embodiments, a pressure relief groove is provided on the side of the support plate facing the battery cell. The pressure relief groove extends in the first direction and corresponds to the pressure relief mechanisms of multiple battery cells. In the above structure, by providing the pressure relief groove, the substances discharged by the pressure relief mechanism can be accommodated, and the pressure relief emissions can be guided to the outside of the box body to reduce the damage caused by the pressure relief emissions to other battery cells, and at the same time quickly reduce the temperature of the battery cells.

[0020] In a second aspect, the present application provides an electrical device, which includes the battery device in the above embodiments, and the battery device is used to provide electrical energy.

[0021] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically illustrates the specific embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The features, advantages and technical effects of the exemplary embodiments of the present application will be described below with reference to the drawings.

[0023] Figure 1 Structural schematic diagram of a vehicle provided for some embodiments of the present application;

[0024] Figure 2 Explosion schematic diagram of a battery device provided for some embodiments of the present application;

[0025] Figure 3 Structural schematic diagram of a battery cell provided for some embodiments of the present application;

[0026] Figure 4 Partial structural schematic diagram of a battery device provided for some embodiments of the present application;

[0027] Figure 5 Partial structural schematic diagram of a battery device provided for other embodiments of the present application;

[0028] Figure 6 For Figure 5 Enlarged structural schematic diagram of part A in;

[0029] Figure 7 Partial structural schematic diagram of a battery device provided for other embodiments of the present application;

[0030] Figure 8 For Figure 7 Enlarged structural schematic diagram of part B in;

[0031] Figure 9 Partial structural schematic diagram of a battery device provided for other embodiments of the present application;

[0032] Figure 10 For Figure 9 Structural schematic diagram of the C-C cross section in;

[0033] Figure 11 For Figure 10 Enlarged structural schematic diagram of part D in;

[0034] Figure 12Partial structural schematic diagram of the battery device provided by other embodiments of the present application;

[0035] Figure 13 For Figure 12 Schematic diagram of the structure of the E-E cross-section in

[0036] Detailed description of reference numerals

[0037] 1. Vehicle; 2. Battery device; 201. First bonding member; 202. Second bonding member; 203. Third bonding member; 3. Controller; 4. Motor; 5. Box body; 5a. First box body part; 5b. Second box body part; 51. First wall; 6. Battery cell; 10. Electrode assembly; 20. Outer shell; 30. End cover; 40. Housing; 50. Electrode terminal; 501. First terminal; 502. Second terminal; 60. Pressure relief mechanism; 7. Heat exchange component; 701. First heat exchange plate; 702. Second heat exchange plate; 703. Third heat exchange plate; 704. Fourth heat exchange plate; 8. Electrical connection piece; 9. Support plate; 901. Convex part; 902. Heat dissipation channel; 903. Pressure relief groove; X. First direction; Y. Second direction. Detailed implementation manners

[0038] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above accompanying drawing descriptions are intended to cover non-exclusive inclusion.

[0040] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "a plurality of" means more than two unless otherwise specifically defined.

[0041] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0042] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0043] In the description of the embodiments of the present application, the term "multiple" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0044] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of the present application.

[0045] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0046] In the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the associated objects before and after.

[0047] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, etc. of various components shown in the drawings in the embodiments of the present application, as well as the overall thickness, length, width, etc. of the integrated device, are only for illustrative purposes and should not constitute any limitation to the present application.

[0048] In the embodiments of the present application, "parallel" not only includes the case of absolute parallelism, but also includes the case of roughly parallelism as conventionally understood in engineering; at the same time, "perpendicular" not only includes the case of absolute perpendicularity, but also includes the case of roughly perpendicularity as conventionally understood in engineering. Exemplarily, if the included angle between two directions is 85°-95°, the two directions can be considered perpendicular; if the included angle between two directions is 0°-5°, the two directions can be considered parallel.

[0049] "Multiple" as used in the present application means two or more (including two).

[0050] In the embodiments of the present application, the battery cell can be a secondary battery, and a secondary battery refers to a battery cell that can be activated by charging after discharging so that the active material can be reused.

[0051] The battery cell can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium-metal battery, a sodium-metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application do not limit this.

[0052] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, and the separator is disposed between the negative electrode and the positive electrode. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can play a role in preventing short circuit between the positive and negative electrodes, and at the same time allow active ions to pass through.

[0053] In some embodiments, the positive electrode can be a positive electrode sheet, and the positive electrode sheet can include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0054] As an example, the positive electrode current collector has two surfaces opposite to each other in its own thickness direction, and the positive electrode active material is disposed on any one or both of the two opposite surfaces of the positive electrode current collector.

[0055] As an example, the positive electrode current collector can be made of a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, and metals with surface treatment can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver, etc. The composite current collector can include a polymer material substrate layer and a metal layer. The composite current collector can be formed by forming a metal material (such as aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0056] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as the positive electrode active material of the battery can also be used. These positive electrode active materials can be used alone or in combination of two or more. Among them, examples of the lithium-containing phosphate may include, but are not limited to, lithium iron phosphate (such as LiFePO4 (which can also be abbreviated as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium manganese iron phosphate, and at least one of a composite material of lithium manganese iron phosphate and carbon. Examples of the lithium transition metal oxide may include, but are not limited to, lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3 Mn 1 / 3 O2 (which can also be abbreviated as NCM 333 ), LiNi 0. o 0.2 Mn 0.3 O2 (which can also be abbreviated as NCM 523 ), LiNi 0. o 0.25 Mn 0.25 O2 (which can also be abbreviated as NCM 211 ), LiNi 0.6 Co 0.2 Mn 0.2 O2 (which can also be abbreviated as NCM 622 ), LiNi 0.8 Co 0.1 Mn 0.1 O2 (which can also be abbreviated as NCM 811 ), lithium nickel cobalt aluminum oxide (such as LiNi 0.8 Co 0.15 Al 0.05 O2) and their modified compounds, etc. The modified compound refers to a substance obtained by modification means such as doping or coating on the basis of the above substances.

[0057] In some embodiments, the negative electrode can be a negative electrode sheet, and the negative electrode sheet can include a negative electrode current collector.

[0058] As an example, the negative electrode current collector can be made of a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as the metal foil, pure metals, alloys, and metals with surface treatment can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver, etc. The composite current collector can include a polymer material substrate layer and a metal layer. The composite current collector can be formed by forming a metal material (such as copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as substrates of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0059] As an example, the negative electrode sheet can include a negative electrode current collector and a negative electrode active material provided on at least one surface of the negative electrode current collector.

[0060] As an example, the negative electrode current collector has two surfaces opposite to each other in its own thickness direction, and the negative electrode active material is provided on either or both of the two opposite surfaces of the negative electrode current collector.

[0061] As an example, the negative electrode active material can be the negative electrode active material for battery cells known in the art. As an example, the negative electrode active material can include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. The silicon-based materials can be selected from at least one of elemental silicon, silicon oxides, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based materials can be selected from at least one of elemental tin, tin oxides, and tin alloys. However, this application is not limited to these materials, and other conventional materials that can be used as the negative electrode active material of battery cells can also be used. These negative electrode active materials can be used alone or in combination of two or more.

[0062] In some embodiments, the negative electrode can be made of a foam metal. The foam metal can be foam nickel, foam copper, foam aluminum, foam alloy, or foam carbon, etc. When the foam metal is used as the negative electrode sheet, the negative electrode active material may not be provided on the surface of the foam metal, or of course, the negative electrode active material can also be provided.

[0063] As an example, the negative electrode active material can be filled and / or deposited in the negative electrode current collector.

[0064] In some embodiments, the material of the positive electrode current collector can be aluminum, and the material of the negative electrode current collector can be copper.

[0065] In some embodiments, the electrode assembly further includes a separator, and the separator is provided between the positive electrode and the negative electrode.

[0066] In some embodiments, the separator is a separator membrane. This application does not have a special limitation on the type of the separator membrane, and any well-known porous structure separator membrane with good chemical stability and mechanical stability can be selected.

[0067] For example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a single component located between the positive and negative electrodes, or can be attached to the surfaces of the positive and negative electrodes. An inorganic particle coating, an organic particle coating, or an organic / inorganic composite coating can also be coated on the surface of the separator.

[0068] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive electrode and the negative electrode, and simultaneously functions to transport ions and isolate the positive and negative electrodes.

[0069] In some embodiments, the battery cell further includes an electrolyte, and the electrolyte functions to conduct ions between the positive and negative electrodes. The present application does not have specific limitations on the type of the electrolyte, and it can be selected according to requirements. The electrolyte can be liquid, gel-like, or solid.

[0070] Among them, the liquid electrolyte includes an electrolyte salt and a solvent.

[0071] In some embodiments, the electrolyte salt can be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluoro(oxalato)borate, lithium bis(oxalato)borate, lithium difluoro bis(oxalato)phosphate, and lithium tetrafluoro(oxalato)phosphate.

[0072] In some embodiments, the solvent can be selected from at least one of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent can also be an ether solvent. The ether solvent can 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.

[0073] In some embodiments, the electrolyte solution can also optionally include additives. For example, the additives can include negative electrode film-forming additives, can also include positive electrode film-forming additives, and can also include additives that can improve certain properties of the battery cell, such as additives for improving the overcharge / quick charge performance of the battery cell, additives for improving the high-temperature performance of the battery cell, additives for improving the low-temperature performance of the battery cell, etc.

[0074] Among them, the gel electrolyte includes a polymer as a backbone network and can be used in combination with an ionic liquid-lithium salt.

[0075] Among them, the solid electrolyte includes a polymer solid electrolyte, an inorganic solid electrolyte, and a composite solid electrolyte.

[0076] As an example, the polymer of the polymer solid electrolyte can include polyethers (polyethylene oxide), polysiloxanes, polycarbonates, polyacrylonitriles, polyvinylidene fluorides, polymethyl methacrylates, single-ion polymers, polyionic liquids, celluloses, etc.

[0077] As an example, the inorganic solid electrolyte can be one or more of an oxide solid electrolyte (crystalline perovskite, sodium superionic conductor, garnet, amorphous LiPON film), a sulfide solid electrolyte (crystalline lithium superionic conductor (lithium germanium phosphorus sulfur, argyrodite), amorphous sulfide), and a halide solid electrolyte, a nitride solid electrolyte, and a hydride solid electrolyte.

[0078] As an example, the composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to the polymer solid electrolyte.

[0079] The electrode assembly can be in a wound structure, a stacked structure, or a hybrid structure of winding and stacking.

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

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

[0082] As an example, multiple positive electrode sheets and multiple negative electrode sheets can be respectively provided, and the multiple positive electrode sheets and the multiple negative electrode sheets are alternately stacked.

[0083] As an example, multiple positive electrode sheets can be provided, and the negative electrode sheet is folded to form multiple stacked folding segments, and a positive electrode sheet is clamped between adjacent folding segments.

[0084] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form multiple stacked folding segments.

[0085] As an example, multiple separators can be provided and are respectively arranged between any adjacent positive electrode sheets or negative electrode sheets.

[0086] As an example, the separator can be continuously provided and is arranged 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, prismatic, etc.

[0088] In some embodiments, the electrode assembly is provided with tabs, and the tabs can conduct the 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 can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc. In some embodiments, the housing can be a sealed structure or a non-sealed structure. As an example, when the housing is a non-sealed structure, the housing functions to protect the electrode assembly, and a sealing bag is further included between the housing and the electrode assembly, and the sealing bag is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film. When the housing is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0090] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal-prismatic battery, etc., and there is no particular limitation in this application.

[0091] In some embodiments, the housing includes an end cap and a housing body. The housing body is provided with an opening, and the end cap covers the opening. The housing body can be provided with one or more openings. One or more end caps can also be provided.

[0092] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab or indirectly connected to the tab through a current collector member. The electrode terminal can be provided on the end cap or on the housing body.

[0093] In a battery device, there are usually multiple battery cells, and a large amount of heat will be generated during the charging and discharging process of the battery cells. In the related art, a heat exchange component is provided at the bottom of the battery cell, and the electrode terminal of the battery cell is provided at the top. With such a structure, the heat exchange component is far from the electrode terminal, and it is impossible to effectively exchange heat for the electrode terminal where more heat accumulates. Therefore, it is necessary to improve the heat exchange efficiency in the area near the electrode terminal and improve the temperature stability of the battery cell.

[0094] In view of this, the present application provides a battery device, in which a box body provides a stable environment for battery cells, reducing the influence of external impurities and moisture on the operation of battery cells. During the charge and discharge process of battery cells, heat is generated, and the end cover is one of the parts where heat is relatively concentrated. By providing a heat exchange component on the end cover and attaching the heat exchange component to the end cover, the heat generated inside the battery cells can be more directly exported. Compared with other heat dissipation methods, the heat transfer path is shorter and the heat dissipation efficiency is higher. A heat exchange flow path is provided inside the heat exchange component, which can provide a heat exchange path for the heat exchange medium, optimize the overall heat transfer path, and improve the heat exchange efficiency.

[0095] The battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel or in a hybrid connection through a busbar component.

[0096] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells.

[0097] 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. As an example, the battery module may be formed by bundling a plurality of battery cells with cable ties.

[0098] In some embodiments, the battery device may be a battery pack, and the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0099] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body by fixing the battery module in the box body.

[0100] As an example, the battery cell assembly may also be accommodated in the box body by directly fixing a plurality of battery cells to the box body.

[0101] As an example, the box body may include a first box body and a second box body. The first box body and the second box body are buckled so that a closed space is formed inside the box body to accommodate the battery cell assembly. The "closed" here means covering or closing, which can be sealed or non-sealed. The first box body may be a top cover or a bottom plate.

[0102] 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.

[0103] In some embodiments, the box body may be part of the chassis structure of a vehicle. For example, a part of the box body may become at least a part of the floor of the vehicle, or a part of the box body may become at least a part of the cross beam and longitudinal beam of the vehicle.

[0104] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, power tools, vehicles, ships, and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0105] The electrical device can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, a power tool, etc. The vehicle can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or an extended-range electric vehicle, etc.; the spacecraft includes airplanes, rockets, space shuttles, and spaceships, etc.; the electric toy includes stationary or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric airplane toys, etc.; the power tool includes metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact electric drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose special restrictions on the above-mentioned electrical devices.

[0106] For the convenience of description, the following embodiments will take the electrical device as a vehicle as an example for illustration.

[0107] Figure 1 It is a schematic structural diagram of a vehicle provided by some embodiments of the present application.

[0108] As shown in FIG. 1, a battery device 2 is provided inside the vehicle 1, and the battery device 2 can be arranged at the bottom, head, or tail of the vehicle 1. The battery device 2 can be used for power supply of the vehicle 1. For example, the battery device 2 can be used as the operating power source of the vehicle 1.

[0109] The vehicle 1 may further include a controller 3 and a motor 4. The controller 3 is used to control the battery device 2 to supply power to the motor 4, for example, to meet the working power requirements during the start, navigation, and driving of the vehicle 1.

[0110] In some embodiments of the present application, the battery device 2 can not only be used as the operating power source of the vehicle 1, but also be used as the driving power source of the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0111] Figure 2 It is an explosion schematic diagram of a battery provided by some embodiments of the present application. As Figure 2 shown, the battery device 2 includes a box body 5 and battery cells 6, and the battery cells 6 are accommodated in the box body 5. The battery cells 6 can be the smallest unit constituting the battery.

[0112] The housing 5 is used to accommodate battery cells 6, and the housing 5 can have various structures. In some embodiments, the housing 5 may include a first housing part 5a and a second housing part 5b. The first housing part 5a and the second housing part 5b cover each other, and the first housing part 5a and the second housing part 5b jointly define an accommodation space for accommodating the battery cells 6. The second housing part 5b can be a hollow structure with one end open, and the first housing part 5a is a plate-like structure. The first housing part 5a covers the open side of the second housing part 5b to form the housing 5 with an accommodation space; both the first housing part 5a and the second housing part 5b can also be hollow structures with one side open, and the open side of the first housing part 5a covers the open side of the second housing part 5b to form the housing 5 with an accommodation space. Of course, the first housing part 5a and the second housing part 5b can have various shapes, such as a cylinder, a cuboid, etc.

[0113] To improve the sealing performance after the connection between the first housing part 5a and the second housing part 5b, a sealing member, such as sealant, sealing ring, etc., can also be provided between the first housing part 5a and the second housing part 5b.

[0114] Assuming that the first housing part 5a covers the top of the second housing part 5b, the first housing part 5a can also be called the upper cover, and the second housing part 5b can also be called the lower housing.

[0115] In the battery device 2, there can be one or multiple battery cells 6. If there are multiple battery cells 6, the multiple battery cells 6 can be connected in series, parallel, or in a hybrid connection. A hybrid connection means that there are both series and parallel connections among the multiple battery cells 6.

[0116] The multiple battery cells 6 can be directly connected in series, parallel, or in a hybrid connection together, and then the whole formed by the multiple battery cells 6 is accommodated in the housing 5; of course, it can also be that multiple battery cells 6 are first connected in series, parallel, or in a hybrid connection to form battery modules, and then the multiple battery modules are connected in series, parallel, or in a hybrid connection to form a whole and are accommodated in the housing 5.

[0117] Please refer to Figures 2 to 6 , Figure 2 which is an exploded view of the battery device provided in some embodiments of the present application, Figure 3 which is a structural schematic diagram of the battery cell provided in some embodiments of the present application, Figure 4 which is a partial structural schematic diagram of the battery device provided in some embodiments of the present application, Figure 5 which is a partial structural schematic diagram of the battery device provided in other embodiments of the present application, Figure 6 is Figure 5 an enlarged structural schematic diagram of part A in

[0118] As shown in the figure, the battery device 2 provided in the embodiment of the present application includes a box body 5, a battery cell 6 and a heat exchange assembly 7. The box body 5 has a receiving cavity, and the box body 5 includes a first wall 51. The battery cell 6 is arranged in the receiving cavity, and the battery cell 6 includes an end cover 30, and the end cover 30 is provided with an electrode terminal 50. The heat exchange assembly 7 is stacked with the first wall 51, and the heat exchange assembly 7 is arranged on the side of the first wall 51 facing the battery cell 6, and a heat exchange flow channel is provided in the heat exchange assembly 7. The heat exchange assembly 7 is at least partially attached to the end cover 30 to exchange heat with the battery cell 6.

[0119] Exemplarily, the first wall 51 may be the bottom wall of the box body 5, or may be the top wall of the box body 5. The battery cell 6 includes a shell 40 and an end cover 30, and the shell 40 has an opening. The end cover 30 covers the opening. A through hole is provided on the end cover 30, and a part of the electrode terminal 50 is provided in the through hole and connected to the end cover 30. One end of the electrode terminal 50 is connected to the electrode assembly 10 of the battery cell 6, and the other end of the electrode terminal 50 is connected to the electrical connecting sheet 8. The heat exchange assembly 7 may include two heat exchange plates arranged opposite to each other, and heat exchange channels are provided in the two heat exchange plates to accommodate the heat exchange medium. The heat exchange medium flows in the heat exchange channel to exchange heat with the battery cell 6.

[0120] In the technical solution of the embodiment of the present application, a box body 5 is provided to provide a stable environment for the battery cell 6, thereby reducing the influence of external impurities and moisture on the operation of the battery cell 6. The battery cell 6 will generate heat during the charging and discharging process, and the end cover 30 is one of the parts where the heat is relatively concentrated. A heat exchange component 7 is provided on the end cover 30, and the heat exchange component 7 is fitted with the end cover 30, which can more directly guide the heat generated inside the battery cell 6. Compared with other heat dissipation methods, the heat transfer path is shorter and the heat dissipation efficiency is higher. A heat exchange flow channel is provided in the heat exchange component 7, which can provide a heat exchange path for the heat exchange medium, optimize the overall heat transfer path, and improve the heat exchange efficiency.

[0121] In some embodiments of the present application, a pressure relief mechanism 60 is further provided on the end cover 30 , and the heat exchange component 7 is spaced apart from the pressure relief mechanism 60 and the electrode terminal 50 .

[0122] When the pressure and temperature inside the battery cell 6 increase due to overcharging, short circuit, thermal runaway, etc., the pressure relief mechanism 60 can respond quickly and release the high-temperature and high-pressure substances inside in time, which can effectively reduce the risk of combustion or explosion of the battery cell 6 and ensure the safety of the battery device 2 and the surrounding environment.

[0123] The pressure relief mechanism 60 is spaced apart from the electrode terminal 50 , which can reduce the damage to the electrode terminal 50 caused by the pressure relief discharge substances and reduce the risk of problems such as short circuits.

[0124] In the above structure, by providing a pressure relief structure, high-temperature and high-pressure substances in the battery cell 6 are discharged in a timely manner, reducing the risk of combustion and explosion of the battery cell 6 and improving the stability during the operation of the battery device 2.

[0125] As Figure 5 and Figure 6 shown, in some embodiments of the present application, the number of battery cells 6 is multiple, and the multiple battery cells 6 are stacked along the first direction X to form a battery cell assembly. Two electrode terminals 50 are provided on each battery cell 6, namely a first terminal 501 and a second terminal 502 respectively. The first terminal 501 and the second terminal 502 are respectively disposed on both sides of the pressure relief mechanism 60 along the second direction Y, and the second direction Y is perpendicular to the first direction X.

[0126] The multiple battery cells 6 are stacked along the first direction X, which can make full use of the space of the box body 5, so as to accommodate more battery cells 6 within a limited volume. This directly improves the energy density of the battery device 2, enabling the battery device 2 to store more electric energy and meet higher energy requirements. Exemplarily, the first direction X is the thickness direction of the battery cell 6.

[0127] Two first terminals 501 and second terminals 502 are provided on each battery cell 6, and these two terminals are respectively located on both sides of the pressure relief mechanism 60 along the second direction Y. This not only facilitates the series or parallel connection between the battery cells 6 to achieve the required voltage and capacity, but also helps to take away the heat generated by the electrode terminals 50 in a timely manner. Exemplarily, the first terminal 501 can be a positive terminal, and the second terminal 502 can be a negative terminal. The second direction Y can be the width direction of the battery cell 6.

[0128] The heat exchange component 7 is at least partially in contact with the end cover 30 of the battery cell 6, and can directly absorb the heat generated by the battery cell 6. The heat exchange component 7 can be made of a metal material with a relatively high thermal conductivity. Since the electrode terminals 50 are usually also one of the main heat generation parts, therefore, by disposing the electrode terminals 50 near the heat exchange component 7, the heat dissipation capacity of the heat exchange component 7 can be more effectively utilized, and the temperature control accuracy of the battery device 2 can be improved.

[0129] By stacking the battery cells 6 and providing two electrode terminals 50 on each battery cell 6, the distribution of heat in the battery cell assembly can be made more uniform. This helps to reduce the occurrence of local overheating and improve the overall heat dissipation efficiency of the battery device 2.

[0130] In the above structure, by increasing the number of battery cells 6, the energy density of the battery device 2 is improved. And by providing two electrode terminals 50 on the end cover 30, the heat generated by the electrode terminals 50 can also be taken away in a timely manner through the heat exchange component 7, improving the temperature control accuracy of the battery device 2.

[0131] In some embodiments of the present application, the heat exchange assembly 7 includes a first heat exchange plate 701 disposed between the first terminal 501 and the pressure relief mechanism 60. A first flow channel extending along the first direction X is provided in the first heat exchange plate 701, and the first flow channel is arranged corresponding to the battery cell assembly.

[0132] Optionally, the distance from the first terminal 501 to the pressure relief mechanism 60 is less than the distance from the first terminal 501 to the edge of the end cover 30. The area of the end cover 30 between the first terminal 501 and the pressure relief mechanism 60 is relatively large.

[0133] The first heat exchange plate 701 is directly disposed between the first terminal 501 and the pressure relief mechanism 60. This layout enables the first heat exchange plate 701 to absorb the heat generated by the first terminal 501 during operation. Since the electrode terminal 50 is usually one of the main heat - generating parts in the battery cell 6, this design can more effectively reduce the temperature of the electrode terminal 50 and improve the heat exchange efficiency of the heat exchange assembly 7.

[0134] The first flow channel extends along the first direction X, which is consistent with the stacking direction of the battery cells 6 in the battery cell assembly, enabling each battery cell 6 in the battery cell assembly to be heat - exchanged, so that the cooling medium can evenly cover all parts of the battery cell assembly, achieving more uniform temperature control.

[0135] In the above - mentioned structure, by providing the first flow channel in the first heat exchange plate 701, the heat generated by the first terminal 501 during operation can be taken away in time, improving the heat exchange efficiency of the heat exchange assembly 7.

[0136] In some embodiments of the present application, the heat exchange assembly 7 further includes a second heat exchange plate 702 disposed between the second terminal 502 and the pressure relief mechanism 60. A second flow channel extending along the first direction X is provided in the second heat exchange plate 702, the second flow channel is arranged corresponding to the battery cell assembly, and the second flow channel is in communication with the first flow channel.

[0137] By adding the second heat exchange plate, the total heat exchange area of the heat exchange assembly 7 is increased, the heat exchange amount per unit time is increased, and the heat exchange efficiency of the heat exchange assembly 7 is improved.

[0138] Optionally, the number of the first flow channels is multiple, and the multiple first flow channels are spaced along the second direction Y. The number of the second flow channels is multiple, and the multiple second flow channels are spaced along the second direction Y. Exemplarily, the end of the second flow channel along the first direction X is in communication with the end of the first flow channel along the first direction X through a connecting flow channel, and the connecting flow channel extends along the second direction Y.

[0139] The second flow channel is interconnected with the first flow channel, forming a continuous cooling medium flow path. This design enables the cooling medium to flow more smoothly within the heat exchange component 7, reducing the flow resistance and thus enhancing the heat dissipation effect. Meanwhile, the extension direction of the flow channel also ensures that the cooling medium can evenly cover all parts of the battery cell assembly, achieving more uniform temperature control.

[0140] In the above structure, by providing the second heat exchange plate 702, the heat exchange area of the heat exchange component 7 is increased, and the heat generated during the operation of the second terminal 502 can be carried away, further improving the heat exchange efficiency of the heat exchange component 7.

[0141] As Figure 7 and Figure 8 shown, in some embodiments of the present application, the heat exchange component 7 includes a third heat exchange plate 703 disposed on the side of the first terminal 501 away from the pressure relief mechanism 60. A third flow channel extending along the first direction X is provided within the third heat exchange plate 703, and the third flow channel corresponds to the battery cell assembly.

[0142] Optionally, the distance from the first terminal 501 to the edge of the end cap 30 is greater than the distance from the first terminal 501 to the pressure relief mechanism 60. The area of the end cap 30 outside the first terminal 501 is relatively large.

[0143] By disposing the third heat exchange plate 703 on the side of the first terminal 501 away from the pressure relief mechanism 60, this layout makes full use of the space outside the end cap 30, avoiding spatial conflicts with other components such as the pressure relief mechanism 60.

[0144] The third flow channel within the third heat exchange plate 703 extends along the first direction X and corresponds to the battery cell assembly, exchanging heat with each battery cell 6 within the battery cell assembly, improving the balance of heat exchange.

[0145] In the above structure, by providing the third heat exchange plate 703 to exchange heat with the area outside the first terminal 501, the space outside the end cap 30 can be fully utilized, and the heat generated during the operation of the first terminal 501 can be carried away in a timely manner, improving the heat exchange efficiency of the heat exchange component 7.

[0146] In some embodiments of the present application, the heat exchange component 7 further includes a fourth heat exchange plate 704 disposed on the side of the second terminal 502 away from the pressure relief mechanism 60. A fourth flow channel extending along the first direction X is provided within the fourth heat exchange plate 704, and the fourth flow channel corresponds to the battery cell assembly. The fourth flow channel is interconnected with the third flow channel.

[0147] On the side of the second terminal 502 away from the pressure relief mechanism 60, a fourth heat exchange plate 704 is added, which expands the total heat exchange area of the heat exchange assembly 7, enabling more heat to be effectively absorbed and dissipated. The fourth flow channel in the fourth heat exchange plate 704 extends along the first direction X and corresponds to the battery cell assembly, exchanging heat with each battery cell 6 in the battery cell assembly, improving the balance of heat exchange. The fourth flow channel communicates with the third flow channel to form a continuous cooling medium flow path. This not only improves the utilization rate of the cooling medium but also ensures the uniform dissipation of heat, reducing the probability of local overheating.

[0148] By providing the fourth heat exchange plate 704, the heat exchange assembly 7 can more comprehensively cover the battery cell assembly and the surrounding area, including the outer sides of the first terminal 501 and the second terminal 502. This helps to timely remove the heat generated during operation and prevent heat accumulation from causing a decline in the performance of the battery cell 6 or potential safety hazards.

[0149] In the above structure, by providing the fourth heat exchange plate 704, not only is the area of the heat exchange assembly 7 increased, but also the area outside the second terminal 502 is heat-exchanged, enabling the full utilization of the space outside the end cover 30 and timely removing the heat generated by the second terminal 502 during operation, improving the heat exchange efficiency of the heat exchange assembly 7.

[0150] As Figures 9 to 11 shown, in some embodiments of the present application, the battery device 2 further includes a support plate 9, which is disposed between the heat exchange assembly 7 and the first wall 51, and the surface of the support plate 9 facing away from the first wall 51 is respectively connected to the electrode terminal 50 and the heat exchange assembly 7.

[0151] Exemplarily, the support plate 9 can be made of materials with certain structural strength, corrosion resistance, and high temperature resistance, such as aluminum alloy, stainless steel, polycarbonate, and carbon fiber reinforced plastic, etc.

[0152] The support plate 9 is located between the heat exchange assembly 7 and the first wall 51, playing a role of connection and support. It not only provides a stable installation foundation for the heat exchange assembly 7 but also ensures the precise alignment between the heat exchange assembly 7 and the battery cell 6. Through the connection function of the support plate 9, the installation position of the heat exchange assembly 7 is precisely controlled. This not only improves the accuracy of the heat exchange position but also ensures that heat can be evenly and efficiently transferred to the heat exchange assembly 7, avoiding problems such as local overheating or insufficient cooling.

[0153] In the above structure, the support plate 9 can connect the heat exchange assembly 7 and the battery cell 6, improving the accuracy of the installation position of the heat exchange assembly 7 and the accuracy of the heat exchange position.

[0154] In some embodiments of the present application, the battery device 2 further includes an electrical connection piece 8, which is used to connect the electrode terminals 50 of two adjacent battery cells 6. On one side surface of the support plate 9 facing the battery cell 6, there is a convex portion 901, and the convex portion 901 abuts against at least a part of the electrical connection piece 8.

[0155] Exemplarily, the support plate 9 includes a plate-shaped body and a convex portion 901 protruding from the surface of the body. The design of the convex portion 901 enables the electrical connection piece 8 to be more accurately positioned on the support plate 9, improving the stability and reliability of the connection between the battery cell 6 and the support plate 9. The support plate 9 can provide a more stable connection foundation for the battery cell 6 and the electrical connection piece 8. This helps to enhance the overall structural stability of the battery device 2 and improve its adaptability in various environments.

[0156] Moreover, the position of the convex portion 901 increases the thickness of the support plate 9, further improving the resistance to external impacts.

[0157] In the above structure, by providing the electrical connection piece 8, two adjacent battery cells 6 are electrically connected. The convex portion 901 is provided on the support plate 9 to connect the electrical connection piece 8 and the support plate 9, improving the accuracy of the installation position of the heat exchange component 7.

[0158] In some embodiments of the present application, the battery device 2 further includes a first adhesive 201 disposed between the convex portion 901 and the electrical connection piece 8. By providing the first adhesive 201, the connection stability between the support plate 9 and the battery cell 6 is improved.

[0159] In some embodiments of the present application, the battery device 2 further includes a second adhesive 202 disposed between the support plate 9 and the heat exchange component 7. By providing the second adhesive 202, the connection stability between the support plate 9 and the heat exchange component 7 is improved.

[0160] In some embodiments of the present application, the battery device 2 further includes a third adhesive 203 disposed between the support plate 9 and the first wall 51. By providing the third adhesive 203, the connection stability between the support plate 9 and the box body 5 is improved.

[0161] The first adhesive 201, the second adhesive 202, and the third adhesive 203 can use the same material. This material needs to have high adhesive strength, high-temperature resistance, and certain corrosion resistance. Exemplarily, materials such as epoxy resin, polyurethane, acrylate, hot melt adhesive, and silicone adhesive can be selected.

[0162] Such as Figure 9As shown, in some embodiments of the present application, the number of support plates 9 is multiple. The multiple support plates 9 are arranged along the second direction Y. A heat dissipation channel 902 is provided between two adjacent support plates 9. The heat dissipation channel 902 extends along the first direction X and corresponds to the pressure relief mechanism 60 of multiple battery cells 6.

[0163] By providing multiple support plates 9, it can ensure that each battery cell assembly has a corresponding support and heat exchange structure, thereby improving the stability of the operation of the battery device 2. The gap between two adjacent support plates 9 is designed as the heat dissipation channel 902, and this structure is simple to manufacture and install. These channels extend along the first direction X and correspond to the pressure relief mechanism 60 of multiple battery cells 6. This design not only helps with heat dissipation but also can timely discharge the substances discharged by the pressure relief mechanism 60, such as gas or electrolyte, etc.

[0164] In the above structure, by providing multiple support plates 9 corresponding to multiple battery cell assemblies, the total heat exchange area is increased, the heat exchange efficiency is improved, and the stability of the operation of the battery device 2 is enhanced. Taking the gap between two support plates 9 as the pressure relief and heat dissipation channel 902 can timely discharge the substances discharged by the pressure relief mechanism 60, reduce the damage caused by the pressure relief emissions to other battery cells 6, and at the same time quickly reduce the temperature of the battery cells 6.

[0165] As Figure 12 and Figure 13 shown, in some embodiments of the present application, a pressure relief groove 903 is provided on the side of the support plate 9 facing the battery cell 6. The pressure relief groove 903 extends along the first direction X and corresponds to the pressure relief mechanism 60 of multiple battery cells 6. The design of the pressure relief groove 903 can accommodate the substances discharged by the pressure relief mechanism 60 of the battery cell 6, such as gas, electrolyte or other pyrolysis products. These substances may be rapidly released in the event of a battery anomaly, and the pressure relief groove 903 provides a safe storage space to prevent them from directly damaging the battery cell 6 or the surrounding structure. The pressure relief groove 903 not only accommodates the pressure relief substances but also guides these substances to be discharged outside the box body 5 of the battery device 2 along a preset path. This helps to reduce the accumulation of pressure relief emissions inside the battery device 2 and reduce the potential threat to other battery cells 6.

[0166] In the above structure, by providing the pressure relief groove 903, it can accommodate the substances discharged by the pressure relief mechanism 60 and guide the pressure relief emissions to the outside of the box body 5 to reduce the damage caused by the pressure relief emissions to other battery cells 6 and at the same time quickly reduce the temperature of the battery cells 6.

[0167] In some optional embodiments, the battery device 2 includes a box body 5, a battery cell 6 and a heat exchange assembly 7. The box body 5 has a accommodating cavity, and the box body 5 includes a first wall 51. The battery cell 6 is arranged in the accommodating cavity, and the battery cell 6 includes an end cover 30, and the end cover 30 is provided with an electrode terminal 50. The heat exchange assembly 7 is stacked with the first wall 51, and the heat exchange assembly 7 is arranged on the side of the first wall 51 facing the battery cell 6, and a heat exchange flow channel is provided in the heat exchange assembly 7. The heat exchange assembly 7 is at least partially attached to the end cover 30 to exchange heat with the battery cell 6. There are multiple battery cells 6, and multiple battery cells 6 are stacked along the first direction X to form a battery cell assembly. Each battery cell 6 is provided with two electrode terminals 50, namely a first terminal 501 and a second terminal 502. The first terminal 501 and the second terminal 502 are respectively arranged on both sides of the pressure relief mechanism 60 along the second direction Y, and the second direction Y is perpendicular to the first direction X. The battery device 2 further includes a support plate 9, which is disposed between the heat exchange assembly 7 and the first wall 51. The side surface of the support plate 9 facing away from the first wall 51 is connected to the electrode terminal 50 and the heat exchange assembly 7 respectively. The battery device 2 further includes an electrical connection sheet 8, which is used to connect the electrode terminals 50 of two adjacent battery cells 6. The side surface of the support plate 9 facing the battery cell 6 is provided with a convex portion 901, and the convex portion 901 abuts against at least part of the electrical connection sheet 8. The battery device 2 further includes a first adhesive member 201 disposed between the convex portion 901 and the electrical connection sheet 8. The battery device 2 further includes a second adhesive member 202 disposed between the support plate 9 and the heat exchange assembly 7. The battery device 2 further includes a third adhesive member 203 disposed between the support plate 9 and the first wall 51.

[0168] The embodiments of the present application also provide an electrical device, which includes the battery device 2 in the above embodiment, and the battery device 2 is used to provide electrical energy. By providing a box body 5 to provide a stable environment for the battery cell 6, the influence of external impurities and moisture on the operation of the battery cell 6 is reduced. The battery cell 6 will generate heat during the charging and discharging process, and the end cover 30 is one of the parts where the heat is relatively concentrated. A heat exchange component 7 is provided on the end cover 30, and the heat exchange component 7 is fitted with the end cover 30, which can more directly guide the heat generated inside the battery cell 6 out. Compared with other heat dissipation methods, the heat transfer path is shorter and the heat dissipation efficiency is higher. A heat exchange flow channel is provided in the heat exchange component 7, which can provide a heat exchange path for the heat exchange medium, optimize the overall heat transfer path, and improve the heat exchange efficiency.

[0169] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A box body having a containing cavity, wherein the box body comprises a first wall; A battery cell is disposed in the accommodating cavity, wherein the battery cell comprises an end cover, and an electrode terminal is disposed on the end cover; A heat exchange component is stacked with the first wall and is arranged on the side of the first wall facing the battery cell. A heat exchange channel is provided in the heat exchange component. The heat exchange component is at least partially attached to the end cover to exchange heat with the battery cell.

2. The battery device according to claim 1, characterized in that: The end cover is also provided with a pressure relief mechanism, and the heat exchange component is spaced apart from the pressure relief mechanism and the electrode terminal.

3. The battery device according to claim 2, characterized in that: There are multiple battery cells, and the multiple battery cells are stacked along a first direction to form a battery cell assembly. Each battery cell is provided with two electrode terminals, namely a first terminal and a second terminal. The first terminal and the second terminal are respectively arranged on both sides of the pressure relief mechanism along a second direction, and the second direction is perpendicular to the first direction.

4. The battery device according to claim 3, characterized in that: The heat exchange assembly includes a first heat exchange plate disposed between the first terminal and the pressure relief mechanism. A first flow channel extending along the first direction is disposed in the first heat exchange plate. The first flow channel is disposed corresponding to the battery cell assembly.

5. The battery device according to claim 4, characterized in that: The heat exchange assembly also includes a second heat exchange plate disposed between the second terminal and the pressure relief mechanism, wherein a second flow channel extending along the first direction is disposed in the second heat exchange plate, the second flow channel is disposed corresponding to the battery cell assembly, and the second flow channel is interconnected with the first flow channel.

6. The battery device according to claim 3, characterized in that: The heat exchange assembly includes a third heat exchange plate disposed on a side of the first terminal away from the pressure relief mechanism. A third flow channel extending along the first direction is disposed in the third heat exchange plate, and the third flow channel is disposed corresponding to the battery cell assembly.

7. The battery device according to claim 6, characterized in that: The heat exchange assembly also includes a fourth heat exchange plate disposed on a side of the second terminal away from the pressure relief mechanism, the fourth heat exchange plate having a fourth flow channel extending along the first direction, and the fourth flow channel is disposed corresponding to the battery cell assembly, and the fourth flow channel is interconnected with the third flow channel.

8. The battery device according to any one of claims 4 to 7, characterized in that: The battery device further includes a support plate, which is disposed between the heat exchange assembly and the first wall. A surface of the support plate facing away from the first wall is connected to the electrode terminal and the heat exchange assembly respectively.

9. The battery device according to claim 8, characterized in that: The battery device further comprises an electrical connection sheet for connecting electrode terminals of two adjacent battery cells. A convex portion is provided on a surface of the support plate facing the battery cells, and the convex portion abuts against at least a portion of the electrical connection sheet.

10. The battery device according to claim 9, characterized in that: The battery device further includes a first adhesive member disposed between the protrusion and the electrical connection sheet.

11. The battery device according to claim 8, characterized in that: The battery device also includes a second adhesive member disposed between the support plate and the heat exchange assembly.

12. The battery device according to claim 8, characterized in that: The battery device further includes a third adhesive member disposed between the support plate and the first wall.

13. The battery device according to claim 8, characterized in that There are multiple support plates, and the multiple support plates are arranged along the second direction. A heat dissipation channel is provided between two adjacent support plates, and the heat dissipation channel extends along the first direction. The heat dissipation channel is arranged corresponding to the pressure relief mechanisms of the multiple battery cells.

14. The battery device according to claim 8, characterized in that A pressure relief groove is provided on one side of the support plate facing the battery cell. The pressure relief groove extends along the first direction. The pressure relief groove is provided corresponding to the pressure relief mechanisms of the plurality of battery cells.

15. An electrical equipment, characterized in that: The electrical equipment comprises a battery device as claimed in any one of claims 1 to 14, wherein the battery device is used to provide electrical energy.

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