Battery, electric device and energy storage device

Abstract

A battery (10), an electric device and an energy storage device. The battery (10) comprises: a battery cell (20); a busbar component (12), wherein the busbar component (12) is used for electrically connect to an electrode terminal (214) of the battery cell (20); and an insulating component (13), the insulating component (13) comprising a main body portion (131) and an extending portion (132) that are connected to each other, wherein the main body portion (131) is attached to the surface of the busbar component (12) that is away from the battery cell (20), and the extending portion (132) is located at an end of the busbar component (12) that is close to the battery cell (20). The extending portion (132) is closer to a first surface relative to the main body portion (131), wherein the first surface is the surface of the battery cell (20) that is close to the electrode terminal (214). In this way, when thermal runaway occurs in the battery cell (20), the configuration of the insulating component (13) can reduce the impact of high-temperature gas and conductive particles which are released by the battery cell (20) on the busbar component (12), thereby reducing the influence on the performance of the busbar component (12), such that the usage performance of the battery (10) is improved.

Description

Batteries, electrical equipment and energy storage equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application 202420325670.X, filed on February 22, 2024, entitled “Batteries, Electrical Equipment and Energy Storage Equipment,” the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The embodiments of the present application relate to the field of battery technology, and in particular to a battery, an electrical device, and an energy storage device. Background Art

[0004] With increasing environmental pollution, the new energy industry is attracting increasing attention. Battery technology is a crucial factor in the development of this industry. In addition to improving battery electrical performance, safety is also a crucial issue. If battery safety cannot be guaranteed, the battery will be unusable, reducing its performance.

[0005] Therefore, how to improve the performance of batteries has become a technical problem that needs to be solved urgently in this field.

[0006] Summary of the Invention

[0007] In view of this, embodiments of the present application provide a battery, an electrical device, and an energy storage device, which can improve the performance of the battery.

[0008] In a first aspect, a battery is provided, comprising: a battery cell; a busbar component for electrically connecting to the electrode terminals of the battery cell; and an insulating component comprising a main body portion and an extension portion connected to each other, the main body portion being attached to a surface of the busbar component away from the battery cell, the extension portion being located at an end of the busbar component close to the battery cell, the extension portion being close to a first surface relative to the main body portion, the first surface being a surface of the battery cell close to the electrode terminals.

[0009] In an embodiment of the present application, the insulating component is configured to include a main body and an extension portion that are interconnected, and the main body is attached to the surface of the busbar component away from the battery cell, the extension portion is located at the end of the busbar component close to the battery cell, and the extension portion is close to a first surface relative to the main body, and the first surface is the surface of the battery cell close to the electrode terminal. In the event of thermal runaway of the battery cell, the provision of the insulating component can reduce the impact of high-temperature gas and conductive particles released by the battery cell on the busbar component, thereby reducing the impact on the performance of the busbar component, thereby improving the performance of the battery.

[0010] In some implementations, the extension portion extends toward a surface of the battery cell that is close to the electrode terminal.

[0011] In an embodiment of the present application, by setting the extension portion to extend toward the surface of the battery cell close to the electrode terminal, in the event of thermal runaway of the battery cell, the impact of the high-temperature gas and conductive particles released by the battery cell on the busbar component can be effectively reduced, thereby reducing the impact on the performance of the busbar component, thereby improving the performance of the battery.

[0012] In some implementations, the extension extends to the surface of the battery cell near the electrode terminal. In this way, in the event of thermal runaway of the battery cell, the impact of high-temperature gas and conductive particles released by the battery cell on the current collector can be further reduced, thereby reducing the impact on the performance of the current collector and improving the performance of the battery.

[0013] In some embodiments, the extension portion includes a first extension portion and a second extension portion connected to each other, the first extension portion is connected to one side of the main body portion, the first extension portion extends to the surface of the battery cell close to the electrode terminal, and the second extension portion extends in a direction away from the electrode terminal.

[0014] In an embodiment of the present application, by setting the extension portion as a first extension portion and a second extension portion connected to each other, and the first extension portion being connected to one side of the main body portion, the first extension portion extends to the surface of the battery cell close to the electrode terminal, and the second extension portion extends in a direction away from the electrode terminal. In the event of thermal runaway of the battery cell, the impact of the high-temperature gas and conductive particles released by the battery cell on the busbar component can be effectively reduced, thereby reducing the impact on the performance of the busbar component, thereby improving the performance of the battery.

[0015] In some implementations, the second extension is attached to a surface of the battery cell near the electrode terminal. This effectively reduces the impact of high-temperature gas and conductive particles released from the battery cell on the busbar in the event of thermal runaway. It also effectively reduces the risk of short circuits or ignition between adjacent busbars due to contact with conductive particles, thereby minimizing the impact on the performance of the busbar and improving the performance of the battery.

[0016] In some implementations, the battery includes adjacent first and second busbar components, a first insulating component corresponding to the first busbar component is adjacent to a second insulating component corresponding to the second busbar component, and a first sub-extension of the first insulating component is connected to a second sub-extension of the second insulating component.

[0017] In an embodiment of the present application, the battery includes a first busbar component and a second busbar component that are adjacent to each other, a first insulating component corresponding to the first busbar component is adjacent to a second insulating component corresponding to the second busbar component, and a first sub-extension of the first insulating component is connected to a second sub-extension of the second insulating component. In this way, in the event of thermal runaway of a battery cell, the risk of short circuit or fire caused by contact with conductive particles between adjacent busbar components can be reduced, thereby reducing the impact on the performance of the busbar component and improving the performance of the battery.

[0018] In some implementations, the first insulating component and the second insulating component are integrally formed. Thus, in the embodiment of the present application, by integrally forming the first insulating component corresponding to the first current collecting component and the second insulating component corresponding to the second current collecting component, the processing and manufacturing efficiency of the insulating components mounted on the battery can be improved.

[0019] In some embodiments, the extension portion includes a third extension portion and a fourth extension portion that are connected to each other, the third extension portion is connected to one side of the main body portion, the third extension portion extends toward the surface of the battery cell close to the electrode terminal, and the fourth extension portion extends to the surface of the busbar component close to the battery cell.

[0020] In an embodiment of the present application, by setting the extension portion as a third extension portion and a fourth extension portion that are connected to each other, and the third extension portion is connected to one side of the main body, the third extension portion extends toward the surface of the battery cell close to the electrode terminal, and the fourth extension portion extends to the surface of the busbar component close to the battery cell. In this way, in the event of thermal runaway of the battery cell, the impact of the high-temperature gas and conductive particles released by the battery cell on the busbar component can be effectively reduced, so as to reduce the impact on the performance of the busbar component, thereby improving the performance of the battery.

[0021] In some implementations, the fourth extension is attached to a surface of the busbar component proximal to the battery cell. Thus, in embodiments of the present application, in the event of thermal runaway of a battery cell, the impact of high-temperature gas and conductive particles released by the battery cell on the busbar component can be further reduced, thereby minimizing the impact on the performance of the busbar component and improving the performance of the battery.

[0022] In some implementations, the insulating component is made of one of the following materials: polyurethane, polyamide, polypropylene, silicone foam, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin.

[0023] In an embodiment of the present application, by setting the material of the insulating component to one of the following materials: polyurethane, polyamide, polypropylene, silicone foam, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, polyethylene epoxy resin, the insulation performance of the insulating component can be improved, and the risk of short circuit or fire caused by contact between adjacent bus components due to conductive particles can be reduced, thereby reducing the impact on the performance of the bus component, thereby improving the performance of the battery.

[0024] In some implementations, the insulating component is adhesively connected to the current collecting component. Thus, in the embodiment of the present application, by adhesively connecting the insulating component to the current collecting component, the connection stability between the insulating component and the current collecting component can be improved, and the connection method is simple and efficient, facilitating the installation of the insulating component.

[0025] In a second aspect, an electric device is provided, comprising the battery described in any one of the implementations of the first aspect, wherein the battery is used to provide electric energy to the electric device.

[0026] In some implementations, the electrical device may be a vehicle, a ship, or a spacecraft.

[0027] In a third aspect, an energy storage device is provided, comprising the battery described in any one of the implementations of the first aspect, wherein the battery is used to store electrical energy for the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0029] FIG1 is a schematic structural diagram of a vehicle provided in one embodiment of the present application.

[0030] FIG2 is a schematic structural diagram of a battery provided in one embodiment of the present application.

[0031] FIG3 is a schematic structural diagram of a battery cell provided in one embodiment of the present application.

[0032] FIG4 is a schematic structural diagram of a battery provided in another embodiment of the present application.

[0033] FIG5 is a schematic cross-sectional view of a battery provided in accordance with an embodiment of the present application.

[0034] FIG6 is a partial cross-sectional schematic diagram of a battery provided in another embodiment of the present application.

[0035] FIG7 is a partial cross-sectional schematic diagram of a battery provided in another embodiment of the present application.

[0036] FIG8 is a partial cross-sectional schematic diagram of a battery provided in another embodiment of the present application.

[0037] FIG9 is a partial cross-sectional schematic diagram of a battery provided in another embodiment of the present application.

[0038] FIG10 is a partial cross-sectional schematic diagram of a battery provided in another embodiment of the present application.

[0039] Explanation of the reference numerals: 1-vehicle; 10-battery; 20-battery cell; 30-controller; 40-motor; 11-casing; 21-housing; 22-electrode assembly; 211-shell; 212-cover; 213-pressure relief mechanism; 221a-first pole lug; 222a-second pole lug; 214-electrode terminal; 214a-positive electrode terminal; 214b-negative electrode terminal; 12-bus component; 121-first bus component; 122-second bus component; 13-insulating component; 131-main body; 132-extension; 1321-first extension; 1322-second extension; 1323-third extension; 1324-fourth extension; 13a-first insulating component; 13b-second insulating component; 1322a-first sub-extension; 1322b-second sub-extension; 14-first support component; 15-second support component.

[0040] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0041] The following detailed description of the implementation of the present application is provided in conjunction with the accompanying drawings and embodiments. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application. That is, the present application is not limited to the described embodiments.

[0042] In the description of the embodiments of the present application, it should be noted that, unless otherwise specified, the meaning of "multiple" is more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but is within the allowable error range. "Parallel" is not parallel in the strict sense, but is within the allowable error range.

[0043] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the present application. In the description of the embodiments of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0044] The term "and / or" in the embodiments of the present application is merely a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in the embodiments of the present application generally indicates that the associated objects are in an "or" relationship.

[0045] Unless otherwise defined, all technical and scientific terms used in the embodiments of the present application have the same meaning as commonly understood by those skilled in the art in the technical field of the present application; the terms used in the specification of the application in the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the embodiments of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the embodiments of the present application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0046] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0047] The battery in the embodiments of this application refers to a physical module that includes one or more battery cells to provide electrical energy. For example, the battery referred to in this application may include a battery module or a battery pack. A battery generally includes a housing that encloses one or more battery cells. The housing can reduce the effects of liquids or other foreign matter on the charging or discharging of the battery cells.

[0048] It should be understood that the battery cells in the embodiments of the present application 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, etc.

[0049] In some implementations, 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 inserted and removed between the positive and negative electrodes. The separator is placed between the positive and negative electrodes to prevent short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0050] In some implementations, the positive electrode may be a positive electrode sheet, which 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.

[0051] 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 provided on either or both of the two facing surfaces of the positive electrode current collector.

[0052] 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 or stainless steel with a silver surface treatment, 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.).

[0053] 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. In some implementations, other traditional materials that can be used as positive electrode active materials for batteries 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, at least one of lithium iron phosphate (such as LiFePO4, also referred to as LFP), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon.

[0054] As an example, the positive active material may include at least one of a sodium transition metal oxide, a polyanion compound, and a Prussian blue-based compound.

[0055] In some implementations, the sodium transition metal oxide may be a sodium transition metal oxide that has been doped and modified, and the doping modification of the sodium transition metal oxide may include at least one of sodium site doping modification, oxygen site doping modification, transition metal site doping modification, and surface coating modification.

[0056] In some implementations, a metal foam may be used as the positive electrode. The metal foam may be nickel foam, copper foam, aluminum foam, alloy foam, or carbon foam, among others. When the metal foam is used as the positive electrode, the surface of the metal foam may or may not be provided with a positive electrode active material. For example, a lithium source material, potassium metal, or sodium metal may be filled and / or deposited within the metal foam, where the lithium source material is lithium metal and / or a lithium-rich material.

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

[0058] As an example, the negative electrode current collector may be a metal foil, a metal foam, or a composite current collector. For example, as the metal foil, aluminum or stainless steel treated with silver, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The metal foam may be nickel foam, copper foam, aluminum foam, alloy foam, or carbon foam, etc. 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.).

[0059] In some implementations, the battery cell in the embodiments of the present application may be a negative electrode-free sodium secondary battery.

[0060] A negative electrode-free sodium secondary battery refers to a battery cell that does not actively set a negative electrode active material layer on the negative electrode side during the manufacturing process of the battery cell. For example, during the manufacturing process of the battery cell, a sodium metal or carbonaceous active material layer is not set at the negative electrode through processes such as coating or deposition to form a negative electrode active material layer. During the first charge, sodium ions gain electrons on the anode side and deposit on the surface of the current collector to form a sodium metal phase. During discharge, metallic sodium can be converted into sodium ions and return to the positive electrode, realizing cyclic charge and discharge. Compared with other sodium secondary batteries, negative electrode-free sodium secondary battery cells can achieve higher energy density due to the lack of a negative electrode active material layer.

[0061] In some implementations, in order to improve the performance of battery cells, some functional coatings, such as carbonaceous materials, metal oxides, alloys, etc., can be provided on the negative electrode side of the negative electrode-free sodium secondary battery to improve the conductivity of the negative electrode current collector and improve the uniformity of the deposited sodium metal.

[0062] In some implementations, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0063] In some implementations, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0064] In some implementations, the separator is a separator. The present invention has no particular restrictions on the type of separator, and any known separator with a porous structure having good chemical and mechanical stability can be used.

[0065] As an example, the main material of the isolation membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics.

[0066] In some implementations, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to both transport ions and isolate the positive and negative electrodes.

[0067] In some implementations, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The present embodiments do not specifically limit the type of electrolyte, and the electrolyte can be selected based on needs. The electrolyte can be liquid, gel, or solid.

[0068] In some implementations, the electrode assembly may be a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0069] In some implementations, the electrode assembly is a laminated structure. As an example, multiple positive and negative electrodes may be provided, and the multiple positive and negative electrodes may be alternately stacked.

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

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

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

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

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

[0075] In some implementations, the electrode assembly is provided with tabs that can conduct current from the electrode assembly. The tabs include a positive tab and a negative tab.

[0076] In some implementations, a 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 (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film.

[0077] As an example, the battery cells may be cylindrical, prismatic, soft-pack or other shaped battery cells. Prismatic battery cells include square-shell, blade-shaped, and polygonal batteries. Polygonal batteries may be, for example, hexagonal batteries.

[0078] In order to meet different power requirements, the battery in the embodiment of the present application may include multiple battery cells, wherein the multiple battery cells can be connected in series, in parallel, or in hybrid connection, and hybrid connection refers to a mixture of series and parallel connection. In some implementations, multiple battery cells can first be connected in series, in parallel, or in hybrid connection to form a battery module, and multiple battery modules can then be connected in series, in parallel, or in hybrid connection to form a battery. In other words, multiple battery cells can directly form a battery, or they can first form a battery module, and the battery module can then form a battery. The battery is further provided in an electrical device to provide electrical energy to the electrical device.

[0079] In some implementations, the battery in the embodiments of the present application may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0080] In some implementations, the battery in the embodiments of the present application may be a battery pack, which includes a housing and battery cells, wherein the battery cells or battery modules are housed in the housing.

[0081] In some implementations, the box in the embodiments of the present application can be used as part of the chassis structure of a vehicle. For example, a portion of the box can become at least a portion of the vehicle's floor, or a portion of the box can become at least a portion of the vehicle's crossbeams and longitudinal beams.

[0082] With the increasing severity of environmental pollution, the new energy industry has attracted more and more attention. In the new energy industry, battery technology is an important factor related to its development. In the development of battery technology, in addition to improving the electrical performance of the battery, safety issues are also an issue that cannot be ignored. If the safety of the battery is not guaranteed, the battery cannot be used, which reduces the performance of the battery. At present, during the use of the battery, the electrode terminals of two adjacent battery cells are connected by a busbar. When the battery cell experiences thermal runaway, it is accompanied by high-speed impact airflow. On the one hand, the large amount of airflow released by the pressure relief mechanism will impact the surface of the busbar, which is easy to damage the insulation layer on the surface of the busbar, causing its insulation performance to deteriorate. On the other hand, the conductive particles released by the battery cell pressure relief mechanism may fall between the two adjacent busbars, which is easy to cause a short circuit and ignition between the busbars, resulting in a decrease in the performance of the battery. Therefore, how to improve the performance of the battery has become a technical problem that needs to be solved urgently in this field.

[0083] In view of this, an embodiment of the present application provides a battery, comprising: a battery cell; a busbar component, the busbar component being electrically connected to the electrode terminals of the battery cell; and an insulating component, the insulating component comprising a main body portion and an extension portion connected to each other, the main body portion being attached to a surface of the busbar component away from the battery cell, the extension portion being located at an end of the busbar component close to the battery cell, the extension portion being close to a first surface relative to the main body portion, the first surface being a surface of the battery cell close to the electrode terminals. Thus, in an embodiment of the present application, in the event of thermal runaway of a battery cell, the provision of the insulating component can reduce the impact of high-temperature gas and conductive particles released by the battery cell on the busbar component, while also reducing the risk of short circuit or ignition between adjacent busbar components due to contact with conductive particles, thereby reducing the impact on the performance of the busbar component and improving the performance of the battery.

[0084] The technical solutions described in the embodiments of the present application are applicable to various battery-powered electrical devices. For example, the electrical devices may be vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may be fuel vehicles, gas vehicles, or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0085] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the electrical equipment described above, but can also be applied to all devices that use batteries. For the sake of simplicity, the following embodiments are described in detail using the electrical equipment as a vehicle as an example.

[0086] For example, as shown in FIG1 , it is a structural schematic diagram of a vehicle 1 provided in an embodiment of the present application. The vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 40, a controller 30 and a battery 10 may be provided inside the vehicle 1. The controller 30 is used to control the battery 10 to power the motor 40. For example, a battery 10 may be provided at the bottom, front or rear of the vehicle 1. The battery 10 may be used to power the vehicle 1. For example, the battery 10 may be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, and for example, the battery 10 may be used for the starting, navigation and operation of the vehicle 1 to meet the working power requirements. In some implementations of the present application, the battery 10 may not only be used as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0087] In order to meet different power usage requirements, the battery 10 in the embodiment of the present application may include at least one battery cell group, and the battery cell group includes a plurality of battery cells, wherein the plurality of battery cells can be electrically connected in series, in parallel, or in hybrid to form a battery 10, wherein hybrid refers to a mixture of series and parallel. The battery 10 may also be referred to as a battery pack. For example, a plurality of battery cells can first be connected in series, in parallel, or in hybrid to form a battery module, and a plurality of battery modules can then be connected in series, in parallel, or in hybrid to form a battery 10. In other words, a plurality of battery cells can directly form a battery 10, or they can first be formed into a battery module, and then the battery modules can be formed into a battery 10.

[0088] In some implementations, the battery 10 may include multiple battery cells 20. For example, FIG2 is a schematic structural diagram of a battery 10 according to one embodiment of the present application. The battery 10 may include multiple battery cells 20. The battery 10 may also include a housing 11 having a hollow interior and housing the multiple battery cells 20. For example, the multiple battery cells 20 may be connected in parallel, in series, or in a mixed combination and then placed in the housing 11.

[0089] In the embodiment of the present application, the number of battery cells 20 can be set to any value according to different power requirements. Multiple battery cells 20 can be connected in series, parallel or hybrid to achieve a larger capacity or power. Since the number of battery cells 20 included in each battery 10 may be large, for ease of installation, the battery cells 20 can be grouped, and each group of battery cells 20 constitutes a battery module. The number of battery cells 20 included in the battery module is not limited and can be set according to demand. The battery 10 may include multiple battery modules, which can be connected in series, parallel or hybrid.

[0090] As shown in FIG3 , it is a schematic structural diagram of a battery cell 20 according to an embodiment of the present application. The battery cell 20 includes one or more electrode assemblies 22, a shell 211 and a cover plate 212. The shell 211 and the cover plate 212 form an outer shell 21 or a battery box. The walls of the shell 211 and the cover plate 212 are both referred to as the walls of the battery cell 20. For a rectangular battery cell 20, the walls of the shell 211 include a bottom wall and four side walls. The shell 211 is determined according to the shape of the one or more electrode assemblies 22 after combination. For example, the shell 211 can be a hollow cuboid, a cube or a cylinder, and one of the faces of the shell 211 has an opening so that one or more electrode assemblies 22 can be placed in the shell 211. For example, when the shell 211 is a hollow cuboid or a cube, one of the planes of the shell 211 is an open surface, that is, the plane does not have a wall, so that the inside and outside of the shell 211 are connected. When the housing 211 is a hollow cylinder, the end surface of the housing 211 is an open surface, that is, the end surface has no wall, so that the inside and outside of the housing 211 are connected. The cover plate 212 covers the opening and is connected to the housing 211 to form a closed cavity for accommodating the electrode assembly 22. The housing 211 is filled with an electrolyte, such as an electrolyte solution.

[0091] The battery cell 20 may also include two electrode terminals 214, which may be disposed on the cover plate 212. The cover plate 212 is typically flat, with the two electrode terminals 214 secured to the flat surface of the cover plate 212. The two electrode terminals 214 are respectively a positive electrode terminal 214a and a negative electrode terminal 214b. Each electrode terminal 214 is provided with a corresponding connecting member, also known as a current collecting member, located between the cover plate 212 and the electrode assembly 22 to electrically connect the electrode assembly 22 to the electrode terminals 214.

[0092] As shown in FIG3 , each electrode assembly 22 has a first electrode tab 221 a and a second electrode tab 222 a. The polarities of the first electrode tab 221 a and the second electrode tab 222 a are opposite. For example, when the first electrode tab 221 a is a positive electrode tab, the second electrode tab 222 a is a negative electrode tab.

[0093] In the battery cell 20 , the electrode assembly 22 can be provided as a single one or multiple ones according to actual use requirements. As shown in FIG3 , two independent electrode assemblies 22 are provided in the battery cell 20 .

[0094] A pressure relief mechanism 213 may also be provided on the battery cell 20. The pressure relief mechanism 213 is used to be activated to release the internal pressure or temperature of the battery cell 20 when the internal pressure or temperature reaches a threshold value.

[0095] The pressure relief mechanism 213 may have various possible pressure relief structures. For example, the pressure relief mechanism 213 may be a temperature-sensitive pressure relief mechanism configured to melt when the internal temperature of the battery cell 20 equipped with the pressure relief mechanism 213 reaches a threshold; and / or the pressure relief mechanism 213 may be a pressure-sensitive pressure relief mechanism configured to rupture when the internal pressure of the battery cell 20 equipped with the pressure relief mechanism 213 reaches a threshold.

[0096] Figure 4 is a schematic structural diagram of a battery 10 provided in another embodiment of the present application. Figure 5 is a schematic cross-sectional diagram of a battery 10 provided in another embodiment of the present application. Figure 6 is a schematic partial cross-sectional diagram of a battery 10 provided in another embodiment of the present application. For example, Figure 5 may be a schematic cross-sectional diagram of the corresponding portion of the battery 10 in Figure 4, and Figure 6 may be an enlarged schematic cross-sectional diagram of the corresponding portion of the battery 10 in Figure 4 or Figure 5.

[0097] In some embodiments, as shown in Figures 4 to 6, the battery 10 includes a battery cell 20, a busbar component 12 and an insulating component 13, the busbar component 12 is used to electrically connect to the electrode terminal 214 of the battery cell 20, and the insulating component 13 includes a main body 131 and an extension portion 132 that are interconnected, the main body 131 is attached to the surface of the busbar component 12 away from the battery cell 20, the extension portion 132 is located at the end of the busbar component 12 close to the battery cell 20, and the extension portion 132 is close to the first surface relative to the main body 131, and the first surface is the surface of the battery cell 20 close to the electrode terminal 214.

[0098] It should be understood that, as shown in Figures 4 to 6, the busbar component 12 in the battery 10 can be used to achieve electrical connection between multiple battery cells 20, such as parallel connection, series connection, or mixed connection. Specifically, the busbar component 12 can achieve electrical connection between the battery cells 20 by connecting the electrode terminals 214 of the battery cells 20. Furthermore, the busbar component 12 can be fixed to the electrode terminals 214 of the battery cells 20 by welding. The electrical energy of the multiple battery cells 20 can be further led out through the box body 11 through a conductive mechanism. Optionally, the conductive mechanism may also belong to the busbar component 12. For example, in an embodiment of the present application, the busbar component 12 and the electrode terminals 214 of the battery cells 20 can be connected by laser welding to improve the connection strength between the busbar component 12 and the electrode terminals 214, and to reduce impurities between the busbar component 12 and the electrode terminals 214.

[0099] It should also be understood that in the embodiment of the present application, the busbar component 12 can be used to electrically connect separated or adjacent battery cells 20. In some implementations, one end of the busbar component 12 can be set at the output end of the battery 10, and the other end of the busbar component 12 is used to electrically connect to an external electrical device.

[0100] It should also be understood that in the embodiment of the present application, the shape of the electrode terminal 214 in the direction perpendicular to the thickness of the electrode terminal 214 can be set according to actual needs. For example, the shape of the electrode terminal 214 includes but is not limited to a circle, an ellipse, a rectangle, and a regular polygon.

[0101] It should also be understood that in the embodiment of the present application, the extension portion 132 attached to the end of the busbar component 12 close to the battery cell 20 may refer to the area formed by the extension portion 132 being located between the busbar component 12, the electrode terminal 214 and the surface of the battery cell 20 close to the electrode terminal 214. By arranging the extension portion 132 at the end of the busbar component 12 close to the battery cell 20, the impact or damage of the high-temperature gas and conductive particles released by the battery cell 20 on the busbar component 12 can be reduced in the event of thermal runaway of the battery cell 20.

[0102] It should also be understood that a first support member 14 may be provided between adjacent battery cells 20 , and the first support member 14 is used to improve the structural stability of the battery 10 to reduce movement or deformation of the battery cells 20 under vibration, impact or external force.

[0103] It should also be understood that the main body 131 and the extension portion 132 of the insulating component 13 can be integrally formed, or the main body 131 and the extension portion 132 can be adhesively connected.

[0104] In an embodiment of the present application, the insulating component 13 is configured to include a main body 131 and an extension portion 132 that are interconnected, and the main body 131 is attached to the surface of the busbar component 12 away from the battery cell 20, the extension portion 132 is located at the end of the busbar component 12 close to the battery cell 20, and the extension portion 132 is close to the first surface relative to the main body 131, and the first surface is the surface of the battery cell 20 close to the electrode terminal 214. In the event of thermal runaway of the battery cell 20, the configuration of the insulating component 13 can reduce the impact of high-temperature gas and conductive particles released by the battery cell 20 on the busbar component 12, thereby reducing the impact on the performance of the busbar component 12, thereby improving the performance of the battery 10.

[0105] In some implementations, as shown in FIG6 , the extension portion 132 extends toward the surface of the battery cell 20 near the electrode terminal 214. In this way, in the event of thermal runaway of the battery cell 20, the impact of the high-temperature gas and conductive particles released by the battery cell 20 on the busbar 12 can be further reduced, thereby reducing the impact on the performance of the busbar 12 and improving the performance of the battery 10.

[0106] Figure 7 shows a partial cross-sectional schematic diagram of a battery 10 according to another embodiment of the present application. In some implementations, as shown in Figure 7 , the extension portion 132 extends to the surface of the battery cell 20 near the electrode terminal 214. This further reduces the impact of high-temperature gases and conductive particles released from the battery cell 20 on the current collector 12 in the event of thermal runaway, thereby minimizing the impact on the performance of the current collector 12 and improving the performance of the battery 10.

[0107] Figure 8 shows a partial cross-sectional view of a battery 10 according to another embodiment of the present application. In some implementations, as shown in Figure 8 , the extension portion 132 includes a first extension portion 1321 and a second extension portion 1322 connected to each other. The first extension portion 1321 is connected to one side of the main body 131 and extends to a surface of the battery cell 20 near the electrode terminal 214. The second extension portion 1322 extends away from the electrode terminal 214.

[0108] It should be understood that in the embodiment of the present application, the first extension portion 1321 and the second extension portion 1322 of the extension portion 132 can be integrally formed, or the first extension portion 1321 and the second extension portion 1322 can be adhesively connected.

[0109] In an embodiment of the present application, by setting the extension portion 132 as a first extension portion 1321 and a second extension portion 1322 that are connected to each other, and the first extension portion 1321 is connected to one side of the main body portion 131, the first extension portion 1321 extends to the surface of the battery cell 20 close to the electrode terminal 214, and the second extension portion 1322 extends in a direction away from the electrode terminal 214. In the event of thermal runaway of the battery cell 20, the impact of the high-temperature gas and conductive particles released by the battery cell 20 on the busbar component 12 can be effectively reduced, thereby reducing the impact on the performance of the busbar component 12, thereby improving the performance of the battery 10.

[0110] 8 , the second extension portion 1322 is attached to the surface of the battery cell 20 near the electrode terminal 214 . For example, the second extension portion 1322 may be adhesively connected to the surface of the battery cell 20 near the electrode terminal 214 .

[0111] In an embodiment of the present application, by attaching the second extension portion 1322 to the surface of the battery cell 20 close to the electrode terminal 214, in the event of thermal runaway of the battery cell 20, the impact of the high-temperature gas and conductive particles released by the battery cell 20 on the busbar component 12 can be effectively reduced, and at the same time, the risk of short circuit or fire caused by contact between adjacent busbar components 12 due to conductive particles can be effectively reduced, thereby reducing the impact on the performance of the busbar component 12, thereby improving the performance of the battery 10.

[0112] FIG9 is a partial cross-sectional schematic diagram of a battery 10 provided in another embodiment of the present application. In some implementations, as shown in FIG9 , the battery 10 includes adjacent first and second current-converging components 121 and 122, wherein a first insulating component 13a corresponding to the first current-converging component 121 is adjacent to a second insulating component 13b corresponding to the second current-converging component 122, and a first sub-extension 1322a of the first insulating component 13a is connected to a second sub-extension 1322b of the second insulating component 13b.

[0113] It should be understood that in the embodiment of the present application, the battery 10 also includes a second support component 15, which is arranged on the surface of the second extension portion 1322 of the first insulating component 13a and the second extension portion 1322 of the second insulating component 13b away from the battery cell 20 to limit and fix the first insulating component 13a and the second insulating component 13b to improve the structural strength between the insulating component 13 and the second support component 15.

[0114] In an embodiment of the present application, the battery 10 includes a first busbar component 121 and a second busbar component 122 adjacent to each other, the first insulating component 13a corresponding to the first busbar component 121 is adjacent to the second insulating component 13b corresponding to the second busbar component 122, and the first sub-extension 1322a of the first insulating component 13a is connected to the second sub-extension 1322b of the second insulating component 13b. In this way, in the event of thermal runaway of the battery cell 20, the risk of short circuit or fire caused by contact with conductive particles between adjacent busbar components 12 can be reduced, thereby reducing the impact on the performance of the busbar component 12, thereby improving the performance of the battery 10.

[0115] In some implementations, the first insulating component 13a and the second insulating component 13b are integrally formed. Thus, in an embodiment of the present application, by integrally forming the first insulating component 13a corresponding to the first confluence component 121 and the second insulating component 13b corresponding to the second confluence component 122, the processing and manufacturing efficiency of the insulating component 13 installed on the battery 10 can be improved.

[0116] It should be understood that in the embodiment of the present application, the first insulating component 13 a corresponding to the first busbar component 121 and the second insulating component 13 b corresponding to the second busbar component 122 may also be connected by bonding.

[0117] Figure 10 shows a partial cross-sectional schematic diagram of a battery 10 provided in another embodiment of the present application. In some implementations, as shown in Figure 10 , the extension portion 132 includes a third extension portion 1323 and a fourth extension portion 1324 that are connected to each other. The third extension portion 1323 is connected to one side of the main body 131 and extends toward the surface of the battery cell 20 near the electrode terminal 214. The fourth extension portion 1324 extends to the surface of the busbar component 12 near the battery cell 20.

[0118] In an embodiment of the present application, the extension portion 132 is set as a third extension portion 1323 and a fourth extension portion 1324 that are connected to each other, and the third extension portion 1323 is connected to one side of the main body 131, the third extension portion 1323 extends toward the surface of the battery cell 20 close to the electrode terminal 214, and the fourth extension portion 1324 extends to the surface of the busbar component 12 close to the battery cell 20. In this way, when the battery cell 20 has thermal runaway, the impact of the high-temperature gas and conductive particles released by the battery cell 20 on the busbar component 12 can be effectively reduced, so as to reduce the impact on the performance of the busbar component 12, thereby improving the performance of the battery 10.

[0119] In some implementations, the fourth extension portion 1324 is attached to a surface of the current-collecting component 12 that is close to the battery cell 20 . Exemplarily, the fourth extension portion 1324 is adhesively connected to the surface of the current-collecting component 12 that is close to the battery cell 20 .

[0120] In an embodiment of the present application, by attaching the fourth extension portion 1324 to the surface of the busbar component 12 close to the battery cell 20, in the event of thermal runaway of the battery cell 20, the impact of the high-temperature gas and conductive particles released by the battery cell 20 on the busbar component can be further reduced, thereby reducing the impact on the performance of the busbar component 12, thereby improving the performance of the battery 10.

[0121] In some implementations, the material of the insulating component 13 includes at least one of the following materials: polyurethane, polyamide, polypropylene, silicone foam, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin.

[0122] In an embodiment of the present application, by setting the material of the insulating component 13 to include at least one of the following materials: polyurethane, polyamide, polypropylene, silicone foam, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin, the insulation performance of the insulating component 13 can be improved, and the risk of short circuit or fire caused by contact between adjacent bus components 12 due to conductive particles can be reduced, thereby reducing the impact on the performance of the bus component 12, thereby improving the performance of the battery 10.

[0123] In some implementations, the insulating component 13 is adhesively connected to the current collecting component 12. Thus, in the embodiment of the present application, by adhesively connecting the insulating component 13 to the current collecting component 12, the connection stability between the insulating component 13 and the current collecting component 12 can be improved, and the connection method is simple and efficient, which facilitates the installation of the insulating component 13.

[0124] Referring again to Figures 4 to 9 above, a battery 10 is provided, including: a battery cell 20, a busbar component 12 and an insulating component 13, the busbar component 12 is used to electrically connect to the electrode terminal 214 of the battery cell 20, the insulating component 13 includes a main body 131 and an extension portion 132 connected to each other, the main body 131 is attached to the surface of the busbar component 12 away from the battery cell 20, the extension portion 132 is located at the end of the busbar component 12 close to the battery cell 20, the extension portion 132 is close to the first surface relative to the main body 131, and the first surface is the surface of the battery cell 20 close to the electrode terminal 214. The extension portion 132 includes a first extension portion 1321 and a second extension portion 1322 connected to each other. The first extension portion 1321 is connected to one side of the main body 131 and extends to the surface of the battery cell 20 near the electrode terminal 214. The second extension portion 1322 extends away from the electrode terminal 214 and is attached to the surface of the battery cell 20 near the electrode terminal 214. The battery 10 includes adjacent first and second current busbar components 121 and 122. The first insulating component 13a corresponding to the first current busbar component 121 is adjacent to the second insulating component 13b corresponding to the second current busbar component 122. The first sub-extension portion 1322a of the first insulating component 13a is connected to the second sub-extension portion 1322b of the second insulating component 13b.

[0125] The present application also provides an electrical device including the battery 10 of any of the above embodiments, wherein the battery 10 is used to provide power to the electrical device. Specifically, the electrical device may be the vehicle 1 shown in FIG1 , or any electrical device using the battery 10 .

[0126] An embodiment of the present application further provides an energy storage device, comprising the battery 10 in any of the above embodiments, wherein the battery 10 is used to store electrical energy for the energy storage device.

[0127] Although the present application has been described with reference to the above-described embodiments, various modifications may be made thereto and components may be replaced with equivalents without departing from the scope of the embodiments of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims.

Claims

1. A battery, characterized in that: include: Battery cell (20); A current collecting component (12), the current collecting component (12) being used to be electrically connected to the electrode terminal (214) of the battery cell (20); An insulating component (13), the insulating component (13) comprising a main body (131) and an extension (132) connected to each other, the main body (131) being attached to a surface of the current collecting component (12) away from the battery cell (20), the extension (132) being located at an end of the current collecting component (12) close to the battery cell (20), the extension (132) being close to a first surface relative to the main body (131), the first surface being a surface of the battery cell (20) close to the electrode terminal (214).

2. The battery according to claim 1, characterized in that The extension portion (132) extends toward a surface of the battery cell (20) close to the electrode terminal (214).

3. The battery according to claim 2, characterized in that The extension portion (132) extends to a surface of the battery cell (20) close to the electrode terminal (214).

4. The battery according to claim 2, characterized in that The extension portion (132) includes a first extension portion (1321) and a second extension portion (1322) connected to each other, wherein the first extension portion (1321) is connected to one side of the main body portion (131), the first extension portion (1321) extends to a surface of the battery cell (20) close to the electrode terminal (214), and the second extension portion (1322) extends in a direction away from the electrode terminal (214).

5. The battery according to claim 4, characterized in that The second extension portion (1322) is attached to a surface of the battery cell (20) close to the electrode terminal (214).

6. The battery according to claim 4, characterized in that The battery comprises a first busbar component (121) and a second busbar component (122) adjacent to each other, a first insulating component (13a) corresponding to the first busbar component (121) and a second insulating component (13b) corresponding to the second busbar component (122) being adjacent to each other, and a first sub-extension portion (1322a) of the first insulating component (13a) and a second sub-extension portion (1322b) of the second insulating component (13b) being connected.

7. The battery according to claim 6, characterized in that The first insulating component (13a) and the second insulating component (13b) are integrally formed.

8. The battery according to claim 1, characterized in that The extension portion (132) includes a third extension portion (1323) and a fourth extension portion (1324) connected to each other, the third extension portion (1323) is connected to one side of the main body portion (131), the third extension portion (1323) extends toward the surface of the battery cell (20) close to the electrode terminal (214), and the fourth extension portion (1324) extends to the surface of the confluence component (12) close to the battery cell (20).

9. The battery according to claim 8, characterized in that The fourth extension portion (1324) is attached to a surface of the current collecting member (12) close to the battery cell (20).

10. The battery according to any one of claims 1 to 9, characterized in that The insulating component (13) is made of one of the following materials: polyurethane, polyamide, polypropylene, silicone foam, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin.

11. The battery according to any one of claims 1 to 10, characterized in that The insulating component (13) is bonded to the current collecting component (12).

12. An electrical device, characterized in that: include: The battery according to any one of claims 1 to 11, wherein the battery is used to provide electrical energy to the electrical device.

13. An energy storage device, characterized in that: include: The battery according to any one of claims 1 to 11, wherein the battery is used to store electrical energy for the energy storage device.

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