Battery, electric device and energy storage device

Abstract

A battery (10), an electric device and an energy storage device. The battery (10) comprises: battery cells (20), wherein a first wall of each battery cell (20) is provided with a pressure relief mechanism (213); a support component (12), wherein the support component (12) is attached to the first walls, and the support component (12) is used for enabling emissions from the battery cells (20) to pass through the support component (12) when the pressure relief mechanisms (213) are actuated; and a protective component (13), wherein the protective component (13) is attached to the surface of the support component (12) away from the battery cells (20), and accommodating cavities (131) in communication with a smoke duct (14) are formed between the protective component (13) and the support component (12), so that the emissions entering the accommodating cavities (131) are discharged to the smoke duct (14); each accommodating cavity (131) comprises a groove (132) having an opening facing the corresponding battery cell (20), and the groove (132) is in communication with the smoke duct (14), so that the emissions are discharged to the smoke duct (14). The use performance of the battery 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 No. 202420344800.4, filed on February 26, 2024, entitled “Batteries, Electrical Equipment and Energy Storage Equipment,” the entire contents of which are incorporated herein by reference. 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 first wall of the battery cell being provided with a pressure relief mechanism; a support component attached to the first wall, the support component being used to allow emissions from the battery cell to pass through the support component when the pressure relief mechanism is actuated; and a protective component attached to a surface of the support component away from the battery cell, the protective component and the support component forming a receiving cavity connected to a flue gas duct, so that the emissions entering the receiving cavity are discharged into the flue gas duct.

[0009] In an embodiment of the present application, a accommodating cavity connected to the flue gas duct is formed between the protective component and the supporting component so that the emissions entering the accommodating cavity can be discharged into the flue gas duct in a timely manner. In this way, in the event of thermal runaway of the battery, the high-temperature and high-pressure gas from the battery cell can quickly enter the flue gas duct, thereby increasing the response speed of the smoke alarm and reducing the risk of electrochemical corrosion and insulation failure of the battery caused by the long residence time of the high-temperature and high-pressure gas in the battery, thereby improving the performance of the battery.

[0010] In some implementations, the accommodating cavity includes a groove opening toward the battery cell, and the groove is in communication with the flue gas duct to discharge the exhaust into the flue gas duct.

[0011] In an embodiment of the present application, the accommodating cavity is configured as a groove with an opening toward the battery cell, and the groove is used to communicate with a flue gas duct to discharge emissions or gases from the battery cell into the flue gas duct. In this way, in the event of thermal runaway of the battery, the high-temperature and high-pressure gas from the battery cell can quickly enter the flue gas duct, thereby increasing the response speed of the smoke alarm and reducing the risk of electrochemical corrosion and insulation failure of the battery caused by the long residence time of the high-temperature and high-pressure gas in the battery, thereby improving the performance of the battery. At the same time, this configuration can also improve the space utilization inside the battery, thereby increasing the energy density of the battery.

[0012] In some implementations, the electrode terminals of the battery cell and the pressure relief mechanism are located on different walls of the battery cell. Thus, in the embodiments of the present application, by arranging the electrode terminals of the battery cell and the pressure relief mechanism on different walls of the battery cell, the impact of high-temperature, high-pressure gas released through the pressure relief mechanism on the electrode terminals can be effectively reduced, thereby reducing the risk of electrochemical corrosion and insulation failure of the electrode terminals and improving the performance of the battery.

[0013] In some implementations, the protective component is at least a portion of the wall of the battery housing. Thus, in the embodiments of the present application, by providing the protective component as at least a portion of the wall of the battery housing, and providing a receiving cavity on the protective component for allowing gas from the battery cell to be discharged into the flue gas duct through the receiving cavity when the pressure relief mechanism is activated, the internal space of the battery is conserved, the space utilization of the housing is improved, and the energy density of the battery is increased. This also facilitates battery installation and improves battery processing efficiency.

[0014] In some implementations, a smoke detection device is provided on the side of the smoke duct away from the battery, and the smoke detection device is used to detect gas discharged through the groove. Thus, in the embodiment of the present application, by providing a smoke detection device on the side of the smoke duct away from the battery, and the smoke detection device is used to detect gas discharged through the groove, in the event of thermal runaway of the battery, high-temperature and high-pressure gas from the battery cells can quickly enter the smoke duct and be detected by the smoke detection device, thereby increasing the response speed of the smoke alarm, reducing the risk of electrochemical corrosion and insulation failure of the battery caused by the long residence time of high-temperature and high-pressure gas in the battery, and improving the performance of the battery.

[0015] In some implementations, the smoke detection device includes at least one of the following: an air pressure sensor, a concentration sensor, and a temperature sensor. Thus, in the embodiments of the present application, by configuring the smoke detection device to include at least one of the following: an air pressure sensor, a concentration sensor, and a temperature sensor, in the event of thermal runaway of the battery, high-temperature, high-pressure gas from the battery cells can quickly enter the smoke duct and be detected by at least one of the air pressure sensor, concentration sensor, and temperature sensor in the smoke detection device. This improves the response speed of the smoke alarm, reduces the risk of electrochemical corrosion and insulation failure of the battery caused by the prolonged residence time of the high-temperature, high-pressure gas in the battery, and improves the battery's performance.

[0016] In some implementations, the groove extends along the arrangement direction of the battery cells, or the groove extends perpendicular to the arrangement direction of the battery cells.

[0017] In the embodiment of the present application, the groove is arranged to extend along the arrangement direction of the battery cells, or the groove is arranged to extend perpendicular to the arrangement direction of the battery cells, so as to facilitate the processing and manufacturing of the battery and reduce the processing cost of the battery.

[0018] In some implementations, there are multiple pressure relief mechanisms and multiple grooves, and the multiple pressure relief mechanisms correspond one-to-one to the multiple grooves.

[0019] In the embodiment of the present application, by providing a plurality of pressure relief mechanisms and a plurality of grooves, and by having a one-to-one correspondence between the plurality of pressure relief mechanisms and the plurality of grooves, the impact of the high-temperature and high-pressure gas or emissions released by the pressure relief mechanism on the actuation performance of the adjacent pressure relief mechanism can be effectively reduced, thereby improving the performance of the battery.

[0020] In some implementations, one of the plurality of grooves corresponds to the plurality of pressure relief mechanisms of the plurality of battery cells arranged along the direction in which the groove extends. Thus, in the embodiments of the present application, by aligning one of the plurality of grooves with the plurality of pressure relief mechanisms of the plurality of battery cells arranged along the direction in which the groove extends, the impact of the high-temperature, high-pressure gas or emissions released by the pressure relief mechanism on the actuation performance of adjacent pressure relief mechanisms can be significantly reduced, thereby improving the performance of the battery. Furthermore, the structure is simple, easy to process and manufacture, and helps reduce manufacturing costs.

[0021] In some implementations, the support member is provided with a through hole corresponding to the pressure relief mechanism. Thus, in the embodiments of the present application, by providing the through hole corresponding to the pressure relief mechanism on the support member, the exhaust from the battery cells can be quickly passed through the support member, thereby allowing the exhaust to be discharged in a timely manner, thereby reducing the thermal impact on the battery cells and improving the performance of the battery.

[0022] In some implementations, a region of the support member corresponding to the pressure relief mechanism is configured to be disruptable by emissions from the battery cell when the pressure relief mechanism is actuated, so that the emissions pass through the support member.

[0023] In an embodiment of the present application, the area of ​​the support component corresponding to the pressure relief mechanism is configured to be capable of being destroyed by emissions from the battery cell when the pressure relief mechanism is actuated, so that the emissions pass through the support component, thereby allowing the emissions to be discharged in a timely manner, reducing the thermal impact on the battery cell, and thus improving the battery's performance.

[0024] In some implementations, a region of the support component corresponding to the pressure relief mechanism is provided with a weakened area, and the weakened area is configured to be destroyed by the exhaust when the pressure relief mechanism is actuated, so that the exhaust passes through the support component.

[0025] In an embodiment of the present application, a weak area is provided in the area of ​​the support component corresponding to the pressure relief mechanism, and the weak area is configured to be destroyed by the discharge when the pressure relief mechanism is actuated, so that the discharge can pass through the support component, that is, when the internal pressure or temperature of the battery cell reaches a threshold value, the discharge can pass through the support component in a timely and rapid manner, thereby achieving rapid pressure relief of the battery cell, effectively reducing the thermal impact on the battery cell, and thus improving the performance of the battery.

[0026] In some embodiments, the weak zone satisfies at least one of the following: the melting point of the material of the weak zone is lower than the melting point of the material of the rest of the support component; the thickness of the weak zone is lower than the thickness of the rest of the support component; the surface of the weak zone perpendicular to the thickness direction of the support component is provided with a notch.

[0027] In an embodiment of the present application, the weak area is set to at least one of the following: the melting point of the material of the weak area is lower than the melting point of the material of the rest of the support component; the thickness of the weak area is less than the thickness of the rest of the support component; the surface of the weak area perpendicular to the thickness direction of the support component is provided with notches, so that the weak area is more easily destroyed by the emissions of the battery cell than the rest of the support component, and when the internal pressure or temperature of the battery cell reaches a threshold value, the emissions can pass through the weak area in a timely and rapid manner to achieve rapid pressure relief of the battery cell, reduce the impact of the emissions on the actuation performance of the pressure relief mechanism of the support component due to the accumulation of the emissions on the side of the pressure relief mechanism close to the battery cell, and reduce the thermal impact on the battery cell, thereby improving the battery performance.

[0028] 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.

[0029] In some implementations, the electrical device may be a vehicle, a ship, or a spacecraft.

[0030] 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

[0031] 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.

[0032] FIG1 is a schematic structural diagram of a vehicle provided in one embodiment of the present application.

[0033] FIG2 is a schematic structural diagram of a battery provided in one embodiment of the present application.

[0034] FIG3 is a schematic structural diagram of a battery cell provided in one embodiment of the present application.

[0035] FIG4 is a schematic structural diagram of a battery provided in another embodiment of the present application.

[0036] FIG5 is a schematic cross-sectional view of a battery provided in accordance with an embodiment of the present application.

[0037] FIG6 is a schematic cross-sectional view of a battery provided in another embodiment of the present application.

[0038] FIG7 is a schematic cross-sectional view of a battery provided in another embodiment of the present application.

[0039] FIG8 is a schematic cross-sectional view of a battery provided in another embodiment of the present application.

[0040] FIG9 is a schematic cross-sectional view of a battery provided in another embodiment of the present application.

[0041] FIG10 is a schematic cross-sectional view of a battery provided in another embodiment of the present application.

[0042] 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-support component; 121-through hole; 122-weak area; 13-protective component; 131-accommodating chamber; 132-groove; 14-smoke duct; 141-smoke detection device.

[0043] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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 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.).

[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. 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.

[0057] 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.

[0058] 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.

[0059] 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 the like. 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 or / and deposited within the metal foam, where the lithium source material is lithium metal and / or a lithium-rich material.

[0060] In some implementations, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0061] As an example, the negative electrode current collector may be a metal foil, a metal foam, or a composite current collector. For example, the metal foil may be silver-surface-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, or titanium. 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, or alloy foam. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, or silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0062] In some implementations, the battery cell in the embodiments of the present application may be a negative electrode-free sodium secondary battery.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] In some implementations, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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 application does not specifically limit the type of electrolyte, and the electrolyte can be selected based on needs. The electrolyte can be liquid, gel, or solid.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of stacked folded segments.

[0075] 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.

[0076] 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.

[0077] In some implementations, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] With increasing environmental pollution, the new energy industry is attracting increasing attention. Within the new energy industry, battery technology is a crucial factor in its development. In addition to improving battery electrical performance, safety is also a crucial issue in the development of battery technology. If battery safety isn't guaranteed, the battery will become unusable, reducing its performance. Currently, when a battery cell experiences thermal runaway, the high-temperature, high-pressure gas released by the cell's pressure relief mechanism must be discharged outside the battery through a pressure relief valve on the battery housing. For example, this high-temperature, high-pressure gas can be discharged into the battery cabinet. A smoke detector then detects the gas and converts the detection result into an electrical signal for output, triggering an alarm. However, because the high-temperature, high-pressure gas must sequentially pass through the battery's exhaust plenum and the housing's pressure relief valve before being discharged outside, the smoke alarm response is slow. Furthermore, if the smoke and electrolyte vapor generated by thermal runaway remain inside the battery for an extended period, it can lead to risks such as electrochemical corrosion or insulation failure, thereby reducing battery performance. Therefore, improving battery performance has become a pressing technical issue in this field.

[0086] In view of this, an embodiment of the present application provides a battery, comprising: a battery cell, wherein a first wall of the battery cell is provided with a pressure relief mechanism; a support member attached to the first wall, the support member configured to allow emissions from the battery cell to pass through the support member when the pressure relief mechanism is activated; and a protective member attached to a surface of the support member remote from the battery cell, wherein a receiving cavity is formed between the protective member and the support member, communicating with a flue gas duct, so that emissions entering the receiving cavity can be discharged into the flue gas duct. Thus, in an embodiment of the present application, by forming a receiving cavity communicating with the flue gas duct between the protective member and the support member, emissions entering the receiving cavity can be promptly discharged into the flue gas duct. Thus, in the event of thermal runaway of the battery, high-temperature and high-pressure gases from the battery cell can quickly enter the flue gas duct, thereby increasing the speed of the smoke alarm response and reducing the risk of electrochemical corrosion and insulation failure of the battery caused by the prolonged residence time of the high-temperature and high-pressure gases in the battery, thereby improving the battery's performance.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] In some implementations, the battery 10 may further include other structures, which will not be described in detail here. For example, the battery 10 may further include a busbar component, which is used to achieve electrical connection between multiple battery cells 20, such as parallel connection, series connection, or mixed connection. Specifically, the busbar component can achieve electrical connection between the battery cells 20 by connecting the electrode terminals of the battery cells 20. Furthermore, the busbar component can be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of the multiple battery cells 20 can be further led out through the box through a conductive mechanism. Optionally, the conductive mechanism may also belong to the busbar component.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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 .

[0098] 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.

[0099] The pressure relief mechanism 213 may be of various possible types. 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 on which the pressure relief mechanism 213 is provided reaches a threshold value; 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 on which the pressure relief mechanism 213 is provided reaches a threshold value.

[0100] 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 cross-sectional diagram of a battery 10 provided in another embodiment of the present application. Figures 7 to 10 are schematic cross-sectional diagrams of the battery 10 provided in an embodiment of the present application, respectively. 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 a schematic cross-sectional diagram of the corresponding portion of the battery 10 in Figure 4. Figures 7 to 10 may be schematic cross-sectional diagrams of the corresponding portion of the battery 10 in Figure 4.

[0101] In some embodiments, as shown in Figures 4 to 10, the battery 10 includes: a battery cell 20, a support component 12 and a protective component 13. The first wall 215 of the battery cell 20 is provided with a pressure relief mechanism 213. The support component 12 is attached to the first wall 215. The support component 12 is used to allow emissions from the battery cell 20 to pass through the support component 12 when the pressure relief mechanism 213 is actuated. The protective component 13 is attached to the surface of the support component 12 away from the battery cell 20. A accommodating cavity 131 connected to the flue gas duct 14 is formed between the protective component 13 and the support component 12, so that the emissions entering the accommodating cavity 131 are discharged to the flue gas duct 14.

[0102] It should be understood that in the embodiments of the present application, for ease of description, as shown in Figures 4 to 10, direction Z may be the thickness direction or height direction of the battery 10, or the direction Z may also be the thickness direction of the support component 12 or the protective component 13, and the direction Z is perpendicular to the direction X and the direction Y; direction X may be the length direction of the battery 10, or the direction X may be the arrangement direction of the battery cells 20, and the direction X is perpendicular to the direction Z and the direction Y; direction Y may be the width direction of the battery 10, and the direction Y is perpendicular to the direction Z and the direction X.

[0103] It should also be understood that the first wall 215 in the embodiment of the present application may be any wall of the battery cell 20. For example, the first wall 215 includes but is not limited to the following examples: the first wall 215 may be the wall with the smallest area of ​​the battery cell 20; the first wall 215 may also be the wall with the largest area of ​​the battery cell 20; the first wall 215 may be the wall adjacent to the wall of the battery cell 20 on which the electrode terminal 214 is provided; the first wall 215 may be the wall opposite to the wall of the battery cell 20 on which the electrode terminal 214 is provided.

[0104] It should also be understood that in the embodiment of the present application, the support component 12 can be bonded to the first wall 215, and the adhesive 112 used to bond the support component 12 to the first wall 215 includes but is not limited to polyurethane adhesive, acrylic adhesive, and silicone rubber adhesive.

[0105] It should also be understood that in the embodiment of the present application, the protective component 13 and the supporting component 12 can be adhesively connected. For example, the protective component 13 and the supporting component 12 can be connected by an adhesive 112.

[0106] It should also be understood that the material of the support component 12 in the embodiment of the present application 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.

[0107] In the embodiment of the present application, a accommodating cavity 131 connected to the flue gas duct 14 is formed between the protective component 13 and the supporting component 12, so that the emissions entering the accommodating cavity 131 can be discharged to the flue gas duct 14 in a timely manner. In this way, in the event of thermal runaway of the battery 10, the high-temperature and high-pressure gas from the battery cell 20 can quickly enter the flue gas duct 14, thereby increasing the response speed of the smoke alarm and reducing the risk of electrochemical corrosion and insulation failure of the battery 10 caused by the long residence time of the high-temperature and high-pressure gas in the battery 10, thereby improving the performance of the battery 10.

[0108] In some implementations, as shown in FIG. 4 to FIG. 10 , the accommodating cavity 131 includes a groove 132 opening toward the battery cell 20 , and the groove 132 is in communication with the flue gas duct 14 to discharge the exhaust into the flue gas duct 14 .

[0109] It should be understood that the protective component 13 may be provided with a groove 132 corresponding to the pressure relief mechanism 213 , and the groove 132 can discharge the high-temperature and high-pressure gas generated by the battery cell 20 through the groove 132 to the flue gas duct 14 connected to the groove 132 .

[0110] In the embodiment of the present application, the accommodating cavity 131 is configured as a groove 132 opening toward the battery cell 20, and the groove 132 is used to communicate with the flue gas duct 14 to discharge the emissions or gases from the battery cell 20 into the flue gas duct 14. In this way, in the event of thermal runaway of the battery 10, the high-temperature and high-pressure gas from the battery cell 20 can quickly enter the flue gas duct 14, thereby increasing the response speed of the smoke alarm and reducing the risk of electrochemical corrosion and insulation failure of the battery 10 caused by the long residence time of the high-temperature and high-pressure gas in the battery 10, thereby improving the performance of the battery 10. At the same time, this arrangement can also improve the space utilization inside the battery 10, thereby increasing the energy density of the battery 10.

[0111] In some implementations, as shown in Figures 4, 7, and 10, the electrode terminal 214 of the battery cell 20 and the pressure relief mechanism 213 are located on different walls of the battery cell 20. For example, the first wall 215 on which the pressure relief mechanism 213 is located may be adjacent to the wall of the battery cell 20 on which the electrode terminal 214 is located; the first wall 215 may be opposite to the wall of the battery cell 20 on which the electrode terminal 214 is located.

[0112] In the embodiment of the present application, by respectively arranging the electrode terminal 214 of the battery cell 20 and the pressure relief mechanism 213 on different walls of the battery cell 20, the influence of the high-temperature and high-pressure gas released through the pressure relief mechanism 213 on the electrode terminal 214 can be effectively reduced, thereby reducing the risk of electrochemical corrosion and insulation failure of the electrode terminal 214 and improving the performance of the battery 10.

[0113] In some implementations, as shown in Figures 4 and 7 to 10, the protective component 13 is at least a portion of the wall of the housing 11 of the battery 10. Thus, in the embodiment of the present application, by providing the protective component 13 as at least a portion of the wall of the housing 11 of the battery 10, and providing the accommodating cavity 131 on the protective component 13 for allowing the gas from the battery cell 20 to be discharged into the flue gas duct 14 through the accommodating cavity 131 when the pressure relief mechanism 213 is actuated, the internal space of the battery 10 is conserved, the space utilization rate of the housing 11 is improved, and the energy density of the battery 10 is increased. At the same time, the installation of the battery 10 is facilitated, and the processing efficiency of the battery 10 is improved.

[0114] In some implementations, a smoke detection device 141 is provided on a side of the smoke duct 14 away from the battery 10 . The smoke detection device 141 is used to detect the gas discharged through the groove 132 .

[0115] It should be understood that in the embodiment of the present application, the smoke detection device 141 can be connected to the battery management unit, the battery pipeline controller and the fire protection system in sequence. When the smoke detection device 141 detects that the chemical parameters of the high-temperature and high-pressure gas released through the pressure relief mechanism 213 of the battery cell 20 are greater than the preset values, the smoke detection device 141 generates an electrical signal and sends it to the battery management unit, the battery pipeline controller and the fire protection system. Subsequently, the battery pipeline controller cuts off the power supply in time, and the fire protection system extinguishes the fire on the battery 10.

[0116] In the embodiment of the present application, a smoke detection device 141 is provided on a side of the smoke duct 14 away from the battery 10, and the smoke detection device 141 is used to detect the gas discharged through the groove 132. In the event of thermal runaway of the battery 10, the high-temperature and high-pressure gas from the battery cell 20 can quickly enter the smoke duct 14 and be detected by the smoke detection device 141, so as to improve the response speed of the smoke alarm, reduce the risk of electrochemical corrosion and insulation failure of the battery 10 caused by the long residence time of the high-temperature and high-pressure gas in the battery 10, and improve the performance of the battery 10.

[0117] In some implementations, the smoke detection device 141 includes at least one of the following: an air pressure sensor, a concentration sensor, and a temperature sensor. Thus, in the embodiments of the present application, by configuring the smoke detection device 141 to include at least one of the following: an air pressure sensor, a concentration sensor, and a temperature sensor, in the event of thermal runaway of the battery 10, high-temperature, high-pressure gas from the battery cells 20 can quickly enter the smoke duct 14 and be detected by at least one of the air pressure sensor, the concentration sensor, and the temperature sensor in the smoke detection device 141. This improves the response speed of the smoke alarm, reduces the risk of electrochemical corrosion and insulation failure of the battery 10 caused by the long residence time of the high-temperature, high-pressure gas in the battery 10, and improves the performance of the battery 10. In some implementations, as shown in Figures 4 to 10, the groove 132 extends along the arrangement direction of the battery cells 20, or the groove 132 extends perpendicular to the arrangement direction of the battery cells 20. Thus, in the embodiment of the present application, by setting the groove 132 to extend along the arrangement direction of the battery cell 20, or setting the groove 132 to extend perpendicular to the arrangement direction of the battery cell 20, the processing and manufacturing of the battery 10 can be facilitated, and the processing cost of the battery 10 can be reduced.

[0118] In some implementations, as shown in FIG. 4 , FIG. 7 , and FIG. 8 , there are multiple pressure relief mechanisms 213 , and there are multiple grooves 132 . The multiple pressure relief mechanisms 213 correspond one-to-one to the multiple grooves 132 .

[0119] In the embodiment of the present application, by providing a plurality of pressure relief mechanisms 213, the number of the grooves 132 is set to be multiple, and the multiple pressure relief mechanisms 213 correspond one-to-one to the multiple grooves 132, the impact of the high-temperature and high-pressure gas or emissions released by the pressure relief mechanism 213 on the actuation performance of the adjacent pressure relief mechanism 213 can be effectively reduced, thereby improving the performance of the battery 10.

[0120] In some implementations, one of the grooves 132 corresponds to the pressure relief mechanisms 213 of the battery cells 20 arranged along the extension direction of the groove 132. It should be understood that in the embodiment of the present application, the extension direction of the groove 132 refers to the extension direction of the groove 132 along its length.

[0121] In the embodiment of the present application, by aligning one of the multiple grooves 132 with the multiple pressure relief mechanisms 213 of the multiple battery cells 20 arranged along the extension direction of the groove 132, the impact of the high-temperature and high-pressure gas or emissions released by the pressure relief mechanism 213 on the actuation performance of the adjacent pressure relief mechanism 213 can be significantly reduced, thereby improving the performance of the battery 10. At the same time, the structure is simple, easy to process and manufacture, and is conducive to reducing manufacturing costs.

[0122] In some implementations, as shown in FIG. 4 , FIG. 5 , FIG. 7 , and FIG. 9 , the support component 12 is provided with a through hole 121 corresponding to the pressure relief mechanism 213 .

[0123] It should be understood that in the embodiment of the present application, the shape of the through hole 121 in the direction perpendicular to the thickness of the support component 12 can be set according to actual needs. For example, the shape of the through hole 121 can be set according to the shape of the pressure relief mechanism 213 of the battery cell 20. Exemplarily, the shape of the through hole 121 includes but is not limited to a circle, an ellipse, a rectangle, and a regular polygon.

[0124] It should also be understood that in the embodiment of the present application, the through hole 121 corresponding to the pressure relief mechanism 213 is provided on the support component 12, which means that the orthographic projection of the through hole 121 on the plane perpendicular to the thickness direction of the support component 12 can be greater than, less than or equal to the orthographic projection of the pressure relief mechanism 213 on the plane perpendicular to the thickness direction of the support component 12.

[0125] In the embodiment of the present application, a through hole 121 corresponding to the pressure relief mechanism 213 is provided on the support component 12 so that the emissions from the battery cell 20 can quickly pass through the support component 12, so that the emissions can be discharged in time, thereby reducing the thermal impact on the battery cell 20 and improving the performance of the battery 10.

[0126] In some implementations, as shown in Figures 8 and 10, the area of ​​the support member 12 corresponding to the pressure relief mechanism 213 is configured to be destroyed by the discharge from the battery cell 20 when the pressure relief mechanism 213 is actuated, so that the discharge passes through the support member 12. Thus, in the embodiment of the present application, by configuring the area of ​​the support member 12 corresponding to the pressure relief mechanism 213 to be destroyed by the discharge from the battery cell 20 when the pressure relief mechanism 213 is actuated, so that the discharge passes through the support member 12, the discharge can be discharged in a timely manner, reducing the thermal impact on the battery cell 20, thereby improving the performance of the battery 10.

[0127] In some implementations, as shown in Figures 8 and 10, the area of ​​the support component 12 corresponding to the pressure relief mechanism 213 is provided with a weak area 122, and the weak area 122 is configured to be able to be destroyed by the exhaust when the pressure relief mechanism 213 is actuated, so that the exhaust passes through the support component 12.

[0128] It should be understood that in the embodiment of the present application, in the thickness direction perpendicular to the support component 12, the shape of the weak area 122 can be set according to actual needs. For example, the shape of the weak area 122 can be set according to the shape of the pressure relief mechanism 213 of the battery cell 20. Exemplarily, the shape of the weak area 122 includes but is not limited to a circle, an ellipse, a rectangle, and a regular polygon.

[0129] It should also be understood that in the embodiment of the present application, a weak area 122 is provided on the area of ​​the support component 12 corresponding to the pressure relief mechanism 213, which means that the orthographic projection of the weak area 122 on the plane perpendicular to the thickness direction of the support component 12 can be greater than or equal to the orthographic projection of the pressure relief mechanism 213 on the plane perpendicular to the thickness direction of the support component 12, or, the orthographic projection of the weak area 122 on the plane perpendicular to the thickness direction of the support component 12 can cover the orthographic projection of the pressure relief mechanism 213 on the plane perpendicular to the thickness direction of the support component 12.

[0130] It should also be understood that the number of weak areas 122 provided on the area of ​​the support component 12 corresponding to the pressure relief mechanism 213 can be set according to actual needs. For example, the number of the weak areas 122 can be one or more.

[0131] In an embodiment of the present application, a weak area 122 is provided in the area of ​​the support component 12 corresponding to the pressure relief mechanism 213, and the weak area 122 is configured to be destroyed by the discharge when the pressure relief mechanism 213 is actuated, so that the discharge passes through the support component 12, that is, when the internal pressure or temperature of the battery cell 20 reaches a threshold value, the discharge can pass through the support component 12 in a timely and rapid manner, thereby achieving rapid pressure relief of the battery cell 20, effectively reducing the thermal impact on the battery cell 20, and thus improving the performance of the battery 10.

[0132] In some embodiments, the weak zone 122 satisfies at least one of the following: the melting point of the material of the weak zone 122 is lower than the melting point of the material of the rest of the support component 12; the thickness of the weak zone 122 is lower than the thickness of the rest of the support component 12; the surface of the weak zone 122 perpendicular to the thickness direction of the support component 12 is provided with a notch.

[0133] It should be understood that in the embodiment of the present application, the melting point of the material in the weak area 122 can be set to be less than or equal to a preset threshold value, so that when the pressure relief mechanism 213 is actuated, the weak area 122 is more easily melted by the discharge released through the pressure relief mechanism 213 than the rest of the support component 12. Secondly, the thickness of the weak area 122 can also be set to be less than the thickness of the rest of the support component 12. Because the weak area 122 is thinner than the rest of the support component 12, when the pressure relief mechanism 213 is actuated, the weak area 122 is more easily destroyed by the discharge released through the pressure relief mechanism 213 than the rest of the support component 12.

[0134] It should also be understood that in the embodiment of the present application, the shape of the notch provided on the surface of the weak zone 122 perpendicular to the thickness direction of the support component 12 can be set according to actual needs. For example, the notch includes but is not limited to a cross notch, a rice notch, and an I-shaped notch.

[0135] In the embodiment of the present application, the weak area 122 is set to at least one of the following: the melting point of the material of the weak area 122 is lower than the melting point of the material of the rest of the support component 12; the thickness of the weak area 122 is lower than the thickness of the rest of the support component 12; the surface of the weak area 122 perpendicular to the thickness direction of the support component 12 is provided with a notch, so that the weak area 122 is more easily damaged by the discharge of the battery cell 20 than the rest of the support component 12, and when the internal pressure or temperature of the battery cell 20 reaches a threshold value, the discharge can pass through the weak area 122 in a timely and rapid manner to achieve rapid pressure relief of the battery cell 20, reduce the influence of the accumulation of the discharge on the side of the pressure relief mechanism 213 of the support component 12 close to the battery cell 20 on the actuation performance of the pressure relief mechanism 213, and reduce the thermal impact on the battery cell 20, thereby improving the performance of the battery 10.

[0136] Referring again to Figures 4 to 10 , a battery 10 is provided, comprising: a battery cell 20, a support member 12, and a protective member 13. A pressure relief mechanism 213 is provided on a first wall 215 of the battery cell 20. The support member 12 is attached to the first wall 215. The support member 12 is configured to allow emissions from the battery cell 20 to pass through the support member 12 when the pressure relief mechanism 213 is activated. The protective member 13 is attached to a surface of the support member 12 facing away from the battery cell 20. A receiving cavity 131 is formed between the protective member 13 and the support member 12, communicating with the flue gas duct 14. This allows emissions entering the receiving cavity 131 to be discharged into the flue gas duct 14. The receiving cavity 131 includes a groove 132 opening toward the battery cell 20. The groove 132 communicates with the flue gas duct 14 to discharge the emissions into the flue gas duct 14. The electrode terminals 214 of the battery cell 20 and the pressure relief mechanism 213 are located on different walls of the battery cell 20. The protective component 13 is at least a portion of the wall of the housing 11 of the battery 10. A smoke detection device 141 is provided on the side of the smoke duct 14 away from the battery 10. The smoke detection device 141 is used to detect gas discharged through the groove 132.

[0137] 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 .

[0138] 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.

[0139] 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: A battery cell (20), wherein a first wall (215) of the battery cell (20) is provided with a pressure relief mechanism (213); a support member (12) attached to the first wall (215), the support member (12) being configured to allow exhaust from the battery cell (20) to pass through the support member (12) when the pressure relief mechanism (213) is actuated; a protective component (13), the protective component (13) being attached to a surface of the support component (12) away from the battery cell (20), and forming a receiving cavity (131) communicating with a flue gas duct (14) between the protective component (13) and the support component (12), so that the exhaust entering the receiving cavity (131) is discharged into the flue gas duct (14); The accommodating cavity (131) comprises a groove (132) opening toward the battery cell (20), and the groove (132) is in communication with the flue gas duct (14) to discharge the exhaust into the flue gas duct (14).

2. The battery according to claim 1, characterized in that The electrode terminal (214) of the battery cell (20) and the pressure relief mechanism (213) are respectively located on different walls of the battery cell (20).

3. The battery according to claim 1 or 2, characterized in that The protective component (13) is at least a portion of a wall of the battery box (11).

4. The battery according to any one of claims 1 to 3, characterized in that A smoke detection device (141) is provided on a side of the smoke duct (14) away from the battery, and the smoke detection device (141) is used to detect gas discharged through the groove (132).

5. The battery according to claim 4, characterized in that The smoke detection device (141) includes at least one of the following: an air pressure sensor, a concentration sensor, and a temperature sensor.

6. The battery according to any one of claims 1 to 5, characterized in that The groove (132) extends along the arrangement direction of the battery cells (20), or the groove (132) extends perpendicular to the arrangement direction of the battery cells (20).

7. The battery according to any one of claims 1 to 6, characterized in that There are multiple pressure relief mechanisms (213), and there are multiple grooves (132). The multiple pressure relief mechanisms (213) correspond to the multiple grooves (132) in a one-to-one manner.

8. The battery according to any one of claims 1 to 6, characterized in that There are multiple pressure relief mechanisms (213), and there are multiple grooves (132). One groove (132) among the multiple grooves (132) corresponds to the multiple pressure relief mechanisms (213) of the multiple battery cells (20) arranged along the extension direction of the groove (132).

9. The battery according to any one of claims 1 to 8, characterized in that The supporting component (12) is provided with a through hole (121) corresponding to the pressure relief mechanism (213).

10. The battery according to any one of claims 1 to 8, characterized in that The region of the support member (12) corresponding to the pressure relief mechanism (213) is configured to be destroyed by the discharge from the battery cell (20) when the pressure relief mechanism (213) is actuated, so that the discharge passes through the support member (12).

11. The battery according to claim 10, characterized in that A weakened area (122) is provided in a region of the support component (12) corresponding to the pressure relief mechanism (213), and the weakened area (122) is configured to be destroyed by the discharge when the pressure relief mechanism (213) is actuated, so that the discharge passes through the support component (12).

12. The battery according to claim 11, characterized in that The weak area (122) satisfies at least one of the following: The melting point of the material of the weak area (122) is lower than the melting point of the material of the remaining portion of the support member (12); The thickness of the weak area (122) is smaller than the thickness of the remaining portion of the support member (12); The surface of the weak area (122) in a direction perpendicular to the thickness of the support component (12) is provided with notches.

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

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

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