Battery, electrical device, and energy storage device

Abstract

Embodiments of the present application provide a battery, an electrical device, and an energy storage device, capable of improving battery performance. The battery comprises: a battery cell, a first wall of the battery cell being provided with a pressure relief mechanism; a support part, used to support the battery cell, the support part comprising a first support part and a second support part which are connected, the first support part and the second support part being located at the same side of the battery cell, the first support part being located between the first wall and the second support part and attached to the first wall, the first support part being provided with a first through hole corresponding to the pressure relief mechanism, and the second support part being provided with a second through hole corresponding to the pressure relief mechanism; a first protective component, the first protective component being used to seal the second through hole, and the first protective component being damaged when the pressure relief mechanism is actuated, thereby allowing emissions from the battery cell to pass through the second support part.

Description

Batteries, electrical equipment and energy storage equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202323180881.3, filed on November 24, 2023, 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] The 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 for supporting the battery cell, the support component comprising a first support component and a second support component connected to each other, the first support component and the second support component being located on the same side of the battery cell, the first support component being located between the first wall and the second support component and attached to the first wall, the first support component being provided with a first through hole corresponding to the pressure relief mechanism, and the second support component being provided with a second through hole corresponding to the pressure relief mechanism; a first protective component, the first protective component being used to close the second through hole, the first protective component being used to be destroyed when the pressure relief mechanism is actuated to allow emissions from the battery cell to pass through the second support component.

[0009] In an embodiment of the present application, a support component and a first protective component are provided in the battery, the support component includes a first support component and a second support component that are connected, the first support component and the second support component are located on the same side of the battery cell, the first support component is located between the first wall and the second support component and is attached to the first wall, the second support component is provided with a second through hole corresponding to the pressure relief mechanism, the first protective component is used to close the second through hole, and the first protective component is used to be destroyed when the pressure relief mechanism is actuated so that the emissions from the battery cell pass through the second support component. In this way, when thermal runaway occurs in the battery cell, the provision of the first protective component can reduce the risk of emissions from the side of the first protective component away from the pressure relief mechanism flowing to the pressure relief mechanism through the second through hole, so as to reduce the thermal impact on the battery cell and reduce the impact on the actuation performance of the pressure relief mechanism, thereby improving the performance of the battery.

[0010] In some implementations, the first protective member is disposed on a surface of the second support member away from the first wall. Thus, in the embodiment of the present application, when thermal runaway occurs in a battery cell, the first protective member is destroyed when the pressure relief mechanism of the battery cell is actuated. This effectively reduces the risk of emissions from the first protective member away from the pressure relief mechanism flowing into the pressure relief mechanism through the second through hole, thereby minimizing the impact on the actuation performance of the pressure relief mechanism and improving the performance of the battery. Furthermore, this configuration is simple and easy to manufacture.

[0011] In some implementations, the first protective component is provided with a first weakened area, and the first weakened area is configured to be destroyed by the exhaust when the pressure relief mechanism is actuated, so that the exhaust passes through the first weakened area.

[0012] In an embodiment of the present application, a first weak area is provided on the first protective component, and the first weak area is configured to be destroyed by the discharge when the pressure relief mechanism is actuated, that is, when the internal pressure or temperature of the battery cell reaches a threshold value, the discharge can promptly and quickly pass through the first weak area to achieve rapid pressure relief of the battery cell, reducing the impact of the accumulation of the discharge on the side of the pressure relief mechanism of the first protective component close to the battery on the actuation performance of the pressure relief mechanism, thereby improving the performance of the battery.

[0013] In some embodiments, the first weak zone satisfies at least one of the following: the melting point of the material of the first weak zone is lower than the melting point of the material of the rest of the first protective component; the thickness of the first weak zone is lower than the thickness of the rest of the first protective component; the surface of the first weak zone perpendicular to the thickness direction of the first protective component is provided with a notch.

[0014] In an embodiment of the present application, the first weak zone is set to at least one of the following: the melting point of the material at the first weak zone is lower than the melting point of the material of the rest of the first protective component; the thickness of the first weak zone is less than the thickness of the rest of the first protective component; the surface of the first weak zone perpendicular to the thickness direction of the first protective component is provided with a notch, so that the first weak zone is more easily destroyed by the emissions of the battery cell than the rest of the first protective component, and when the internal pressure or temperature of the battery cell reaches a threshold value, the emissions can pass through the first weak zone in a timely and rapid manner to achieve rapid pressure relief of the battery cell, reduce the influence of the accumulation of the emissions on the actuation performance of the pressure relief mechanism of the first protective component close to the battery cell, and thus improve the performance of the battery.

[0015] In some implementations, there are multiple pressure relief mechanisms, and the first protective component is provided with multiple first weak areas, each corresponding to each of the multiple pressure relief mechanisms. Thus, in the embodiment of the present application, by providing multiple first weak areas on the first protective component, and each corresponding to each of the multiple pressure relief mechanisms, when a battery cell experiences thermal runaway, that is, when the internal pressure or temperature of the battery cell reaches a threshold, the emissions generated by the battery cell can promptly and quickly pass through the corresponding first weak area, thereby achieving rapid pressure relief for the battery cell and simultaneously reducing the impact of the emissions on the actuation performance of the pressure relief mechanisms of other battery cells, thereby improving the performance of the battery.

[0016] In some implementations, on a plane perpendicular to the thickness direction of the first protective component, the projection of the first protective component covers the projection of the pressure relief mechanism.

[0017] In an embodiment of the present application, on a plane perpendicular to the thickness direction of the first protective component, by setting the projection of the first protective component to cover the projection of the pressure relief mechanism, the first protective component can further reduce the risk of emissions from the side of the first protective component away from the pressure relief mechanism flowing to the pressure relief mechanism through the first protective component, thereby reducing the impact on the actuation performance of the pressure relief mechanism, and further improving the performance of the battery.

[0018] In some implementations, the battery further includes: a second protective component, the second protective component being configured to close the first through hole, the second protective component being configured to be destroyed when the pressure relief mechanism is actuated to allow emissions from the battery cell to pass through the first support component.

[0019] In an embodiment of the present application, a second protective component is provided in the battery, the second protective component is used to close the first through hole, and the second protective component is used to be destroyed when the pressure relief mechanism is actuated, so that the emissions from the battery cell pass through the first support component. In this way, when thermal runaway occurs in the battery cell, the provision of the second protective component can reduce the risk of emissions from the side of the second protective component away from the pressure relief mechanism flowing to the pressure relief mechanism through the first through hole, thereby reducing the thermal impact on the battery cell and reducing the impact on the actuation performance of the pressure relief mechanism, thereby improving the performance of the battery.

[0020] In some implementations, the second protective member is disposed on a surface of the first support member away from the first wall. Thus, in the embodiment of the present application, when thermal runaway occurs in a battery cell, the second protective member is destroyed when the pressure relief mechanism of the battery cell is actuated. This effectively reduces the risk of emissions from the second protective member away from the pressure relief mechanism flowing into the pressure relief mechanism through the first through hole, thereby minimizing the impact on the actuation performance of the pressure relief mechanism and improving the performance of the battery. Furthermore, this configuration is simple and easy to manufacture.

[0021] In some implementations, a second weak area is provided on the second protective component, and the second weak area is configured to be destroyed by the exhaust when the pressure relief mechanism is actuated, so that the exhaust passes through the second protective component.

[0022] In an embodiment of the present application, a second weak area is provided on the second protective component, and the second weak area is configured to be destroyed by the discharge when the pressure relief mechanism is actuated, that is, when the internal pressure or temperature of the battery cell reaches a threshold value, the discharge can promptly and quickly pass through the second weak area to achieve rapid pressure relief of the battery cell, reducing the impact of the accumulation of the discharge on the side of the pressure relief mechanism of the second protective component close to the battery on the actuation performance of the pressure relief mechanism, thereby improving the performance of the battery.

[0023] In some embodiments, the second weak zone satisfies at least one of the following: the melting point of the material of the second weak zone is lower than the melting point of the material of the rest of the second protective component; the thickness of the second weak zone is lower than the thickness of the rest of the second protective component; the surface of the second weak zone perpendicular to the thickness direction of the second protective component is provided with a notch.

[0024] In an embodiment of the present application, the second weak area is set to at least one of the following: the melting point of the material at the second weak area is lower than the melting point of the material of the rest of the second protective component; the thickness of the second weak area is less than the thickness of the rest of the second protective component; the surface of the second weak area perpendicular to the thickness direction of the second protective component is provided with a notch, so that the second weak area is more easily destroyed by the emissions of the battery cell than the rest of the second protective component, and when the internal pressure or temperature of the battery cell reaches a threshold value, the emissions can pass through the second weak area in a timely and rapid manner to achieve rapid pressure relief of the battery cell, reduce the influence of the accumulation of the emissions on the actuation performance of the pressure relief mechanism of the second protective component close to the battery cell, and thus improve the performance of the battery.

[0025] In some implementations, the battery further includes an isolation component connected to the first support component, the first support component being attached to the first wall via an adhesive, the isolation component being configured to prevent the adhesive from being applied to the area where the pressure relief mechanism is located.

[0026] In an embodiment of the present application, an isolation component is provided in the battery, and the isolation component is connected to the first support component. When the first support component is attached to the first wall by an adhesive, the isolation component is configured to prevent the adhesive from being applied to the area where the pressure relief mechanism is located. This can effectively reduce the impact of the adhesive entering the pressure relief mechanism on the actuation performance of the pressure relief mechanism, thereby improving the performance of the battery.

[0027] In some implementations, the isolation component is provided with a groove opening toward the battery cell, at least a portion of a side wall of the groove is located within the first through hole, and an outer edge of the groove is connected to the side wall and is provided between the first support component and the first wall.

[0028] In an embodiment of the present application, by setting the isolation component as a groove with an opening toward the battery cell, at least a portion of the side wall of the groove is located in the first through hole, and the outer edge of the groove is connected to the side wall and is arranged between the first support component and the first wall. When the first support component is configured to be attached to the first wall by an adhesive, the adhesive can be effectively prevented from being applied between the support component and the pressure relief mechanism, effectively reducing the impact of the adhesive entering the pressure relief mechanism on the actuation performance of the pressure relief mechanism, thereby improving the performance of the battery.

[0029] In some implementations, the bottom wall of the groove is configured to be broken by the exhaust gas when the pressure relief mechanism is actuated, so as to allow the exhaust gas to pass through the isolation component.

[0030] In an embodiment of the present application, by configuring the bottom wall of the groove to be capable of being destroyed by the emissions discharged from the battery cell when the pressure relief mechanism is actuated, and allowing the emissions to pass through the isolation component, the emissions can be discharged in a timely manner, thereby reducing the impact of the accumulation of the emissions in the groove on the actuation performance of the pressure relief mechanism, thereby reducing the thermal impact on the battery cell and improving the performance of the battery.

[0031] In some implementations, a third weakened area is provided on the bottom wall of the groove, and the third weakened area is configured to be broken by the exhaust gas when the pressure relief mechanism is actuated, so as to allow the exhaust gas to pass through the isolation component.

[0032] In an embodiment of the present application, a third weak area is provided on the bottom wall of the groove, and the third weak area is configured to be destroyed by the discharge when the pressure relief mechanism is actuated, that is, when the internal pressure or temperature of the battery cell reaches a threshold value, the discharge can pass through the isolation component in a timely and rapid manner to achieve rapid pressure relief of the battery cell, effectively reducing the impact of the accumulation of the discharge in the groove on the actuation performance of the pressure relief mechanism, thereby improving the performance of the battery.

[0033] In some embodiments, the third weak zone satisfies at least one of the following: the melting point of the material of the third weak zone is lower than the melting point of the material of the rest of the isolation component; the thickness of the third weak zone is lower than the thickness of the rest of the isolation component; the surface of the third weak zone in the direction perpendicular to the thickness of the isolation component is provided with a notch.

[0034] In an embodiment of the present application, the third weak zone is set to at least one of the following: the melting point of the material of the third weak zone is lower than the melting point of the material of the rest of the isolation component; the thickness of the third weak zone is less than the thickness of the rest of the isolation component; the surface of the third weak zone perpendicular to the thickness direction of the isolation component is provided with notches, so that the third weak zone is more easily destroyed by the emissions of the battery cell than the rest of the isolation component, and when the internal pressure or temperature of the battery cell reaches a threshold value, the emissions can pass through the third weak zone in a timely and rapid manner to achieve rapid pressure relief of the battery cell, reducing the impact of the accumulation of the emissions on the actuation performance of the pressure relief mechanism of the isolation component close to the battery cell, thereby improving the performance of the battery.

[0035] In some implementations, the battery further includes: a third protective component connected to a surface of the isolation component facing away from the pressure relief mechanism to protect the isolation component.

[0036] In an embodiment of the present application, a third protective component is provided in the battery, and the third protective component is connected to the surface of the isolation component facing away from the pressure relief mechanism, so that the third protective component can protect the isolation component, thereby reducing the possibility of damage to the surface of the isolation component facing away from the pressure relief mechanism when subjected to vibration, impact, high temperature, etc., thereby improving the performance of the battery.

[0037] In some implementations, the isolation component and the third protective component are configured to be destroyed by emissions from the battery cell when the pressure relief mechanism is actuated, so that the emissions pass through the isolation component and the third protective component.

[0038] In an embodiment of the present application, the isolation component and the third protective component are configured to be destroyed by emissions from the battery cell when the pressure relief mechanism is actuated, so that the emissions pass through the isolation component and the third protective component. As a result, during the actuation of the pressure relief mechanism, the emissions discharged by the pressure relief mechanism can smoothly pass through the isolation component and the third protective component and be discharged from the electrical cavity of the battery, thereby reducing the thermal impact on the battery cell and improving the performance of the battery.

[0039] In some implementations, the melting point of the third shielding component is greater than the melting point of the isolation component.

[0040] In an embodiment of the present application, by connecting the third protective component to the surface of the isolation component facing away from the pressure relief mechanism, and setting the melting point of the third protective component to be greater than the melting point of the isolation component, the possibility of damage to the surface of the isolation component facing away from the pressure relief mechanism due to vibration, impact, high temperature, etc. can be reduced, thereby improving the performance of the battery.

[0041] In some implementations, the first protective component is made of one of the following materials: polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, or polyethylene epoxy resin. Thus, in the embodiments of the present application, by setting the first protective component to be made of one of the following materials: polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, or polyethylene epoxy resin, the insulation performance of the first protective component can be effectively improved, the risk of internal short circuits in the battery can be reduced, and the battery's performance can be improved.

[0042] 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.

[0043] In some implementations, the electrical device may be a vehicle, a ship, or a spacecraft.

[0044] 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

[0045] 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.

[0046] FIG1 is a schematic structural diagram of a vehicle provided in one embodiment of the present application.

[0047] FIG2 is a schematic structural diagram of a battery provided in one embodiment of the present application.

[0048] FIG3 is a schematic structural diagram of a battery cell provided in one embodiment of the present application.

[0049] FIG4 is a schematic diagram of the exploded structure of a battery provided in another embodiment of the present application.

[0050] FIG5 is a schematic cross-sectional view of a battery provided in accordance with an embodiment of the present application.

[0051] FIG6 is a partial cross-sectional schematic diagram of a battery provided in one embodiment of the present application.

[0052] FIG7 is a schematic structural diagram of a first protective component provided in an embodiment of the present application.

[0053] FIG8 is a schematic structural diagram of a first protective component provided in another embodiment of the present application.

[0054] FIG9 is a schematic cross-sectional view of a battery provided in another embodiment of the present application.

[0055] FIG10 is a partial cross-sectional schematic diagram of a battery provided in another embodiment of the present application.

[0056] FIG11 is a schematic cross-sectional view of a battery provided in another embodiment of the present application.

[0057] FIG12 is a partial cross-sectional schematic diagram of a battery provided in another embodiment of the present application.

[0058] Explanation of reference numerals: 1-vehicle; 10-battery; 20-battery cell; 30-controller; 40-motor; 11-tank; 21-housing; 22-electrode assembly; 211-housing; 212-cover; 213-pressure relief mechanism; 221a-first electrode tab; 222a-second electrode tab; 214-electrode terminal; 214a-positive electrode terminal; 214b-negative electrode terminal; 111-tank pressure relief valve; 12-support component; 1 3-first protective component; 112-adhesive; 121-first supporting component; 122-second supporting component; 1211-first through hole; 1221-second through hole; 215-first wall; 131-first weak area; 14-second protective component; 141-second weak area; 15-isolating component; 16-third protective component; 150-groove; 151-side wall; 152-outer edge; 153-bottom wall; 154-third weak area.

[0059] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0060] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of the embodiments of the present application, but are not intended to limit the scope of the embodiments of the present application. That is, the embodiments of the present application are not limited to the described embodiments.

[0061] Unless otherwise defined, all technical and scientific terms used in the embodiments of the present application have the same meanings as those commonly understood by technicians in the technical fields of the embodiments of the present application; the terms used herein 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" in the description and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0062] In the description of the embodiments of this application, the technical terms "first," "second," etc. are used only to distinguish different objects and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0063] 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.

[0064] In the description of the embodiments of this application, the term "and / or" is simply 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 alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0065] It should be understood that in the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0066] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0067] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] In some implementations, the battery cell in the embodiments of the present application may be a metal battery. Specifically, the metal battery may include a lithium metal secondary battery, a sodium metal battery, or a magnesium metal battery.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.).

[0076] 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.

[0077] As an example, the positive electrode active material may include at least one of a sodium transition metal oxide, a polyanionic compound, and a Prussian blue-based compound:

[0078] 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.

[0079] 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.

[0080] In some implementations, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0081] 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.).

[0082] In some implementations, the battery cell in the embodiments of the present application may be a negative electrode-free sodium secondary battery.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] In some implementations, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of stacked folded segments.

[0095] 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.

[0096] 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.

[0097] In some implementations, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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. Optionally, 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 arranged in an electrical device to provide electrical energy to the electrical device.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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 thermal runaway of a battery cell, the high-temperature gas and particulate matter released through the pressure relief mechanism of the battery cell will rebound due to the impact on the inner wall or cover of the box and other structures. The emissions after rebound may have a thermal impact on the pressure relief mechanisms of other battery cells, thereby triggering thermal runaway of other battery cells, and also affecting the actuation performance of the pressure relief mechanism. Therefore, how to improve the performance of the battery has become a technical problem that needs to be solved urgently in this field.

[0106] In view of this, an embodiment of the present application provides a battery, comprising: a battery cell, a first wall of the battery cell being provided with a pressure relief mechanism; a support member for supporting the battery cell, the support member comprising a first support member and a second support member connected to each other, the first support member and the second support member being located on the same side of the battery cell, the first support member being located between the first wall and the second support member and attached to the first wall, the first support member being provided with a first through-hole corresponding to the pressure relief mechanism, and the second support member being provided with a second through-hole corresponding to the pressure relief mechanism; and a first shield member, the first shield member being provided with a second through-hole corresponding to the pressure relief mechanism, the first shield member being provided with a second through-hole corresponding to the pressure relief mechanism, the first shield member being provided with a second through-hole corresponding to the pressure relief mechanism, and a first shield member being provided with a second through-hole corresponding to the pressure relief mechanism, the first shield member being provided with a second through-hole corresponding to the pressure relief mechanism, and the first shield member being provided with a second through-hole corresponding to the pressure relief mechanism, so as to be destroyed when the pressure relief mechanism is actuated. Thus, in the event of thermal runaway of the battery cell, the provision of the first shield member can reduce the risk of emissions from the side of the first shield member away from the pressure relief mechanism flowing into the pressure relief mechanism through the second through-hole, thereby reducing the thermal impact on the pressure relief mechanism and the impact on the actuation performance of the pressure relief mechanism, thereby improving the performance of the battery.

[0107] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be fuel-powered vehicles, gas-powered vehicles, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include aircraft, 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. Power tools include metal cutting tools, grinding tools, assembly tools, and railway tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0108] 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.

[0109] 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 supply power to 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, for example, for the working power requirements during the startup, navigation and operation of the vehicle 1. In another implementation 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.

[0110] In order to meet different power usage requirements, the battery 10 in the embodiment of the present application can be a battery cell group or a battery pack. The battery 10 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 mixed connection to form a battery 10, wherein mixed connection refers to a mixture of series and parallel connection. The battery 10 can 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 mixed connection to form a battery module, and a plurality of battery modules can then be connected in series, in parallel, or in mixed connection 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.

[0111] In some implementations, the battery 10 may include multiple battery cells. For example, FIG2 is a schematic diagram of the structure 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.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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 .

[0118] 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.

[0119] 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.

[0120] 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.

[0121] In some implementations, as shown in Figures 4 to 6, the battery 10 includes: a battery cell 20, a support component 12, and a first 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 used to support the battery cell 20. The support component 12 includes a first support component 121 and a second support component 122 connected to each other. The first support component 121 and the second support component 122 are located on the same side of the battery cell 20. The first support component 121 is located on the first support component 122. A wall 215 is provided between the first support component 121 and the second support component 122 and is attached to the first wall 215. The first support component 121 is provided with a first through hole 1211 corresponding to the pressure relief mechanism 213. The second support component 122 is provided with a second through hole 1221 corresponding to the pressure relief mechanism 213. The first protective component 13 is used to close the second through hole 1221. The first protective component 13 is used to be destroyed when the pressure relief mechanism 213 is actuated to allow the emissions from the battery cell 20 to pass through the second support component 122.

[0122] It should be understood that in the embodiment of the present application, the shape of the first through hole 1211 on the first support component 121 in a direction perpendicular to the thickness of the first support component 121 can be set according to actual needs. For example, the shape of the first through hole 1211 can be set according to the shape of the pressure relief mechanism 213 of the battery cell 20. Exemplarily, the shape of the first through hole 1211 includes but is not limited to a circle, an ellipse, a rectangle, and a regular polygon. Correspondingly, in the embodiment of the present application, the shape of the second through hole 1221 on the second support component 122 in a direction perpendicular to the thickness of the second support component 122 can be set according to actual needs. For example, the shape of the second through hole 1221 can be set according to the shape of the pressure relief mechanism 213 of the battery cell 20. Exemplarily, the shape of the second through hole 1221 includes but is not limited to a circle, an ellipse, a rectangle, and a regular polygon.

[0123] 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 of the battery cell 20 on which the electrode terminal 214 is provided; 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 may be the wall opposite to the wall of the battery cell 20 on which the electrode terminal 214 is provided.

[0124] It should also be understood that in the embodiment of the present application, as shown in Figures 4 and 5, a case pressure relief valve 111 is provided on the surface of the side wall of the case 11 of the battery 10 away from the interior of the case 11. The case pressure relief valve 111 is used to release the high-pressure and high-temperature gas generated during the pressure relief process when the pressure relief mechanism 213 of the battery cell 20 is actuated, so as to reduce the thermal impact on the battery cell 20 and improve the performance of the battery 10.

[0125] It should also be understood that in the embodiment of the present application, the first support component 121 is adhesively connected to the first wall 215 of the battery cell 20. For example, as shown in Figures 5 and 6, the first support component 121 is connected to the first wall 215 of the battery cell 20 via an adhesive 112.

[0126] It should also be understood that in the embodiment of the present application, the pressure relief mechanism 213 is configured to be actuated to release the internal pressure of the battery cell 20 when the internal pressure or temperature reaches a threshold value. The first through-hole 1211 in the embodiment of the present application is configured to allow exhaust from the battery cell 20 to pass through the first support member 121 when the pressure relief mechanism 213 is actuated, and the second through-hole 1221 in the embodiment of the present application is configured to allow exhaust from the battery cell 20 to pass through the second support member 122 when the pressure relief mechanism 213 is actuated.

[0127] It should also be understood that in the embodiment of the present application, the average distance between the first support member 121 and the second support member 122 can be set according to actual needs to meet the structural strength of the battery 10. It should also be understood that in the embodiment of the present application, the battery 10 also includes multiple other support members, such as a third support member. The third support member can be arranged on a side of the second support member 122 away from the pressure relief mechanism 213 of the battery 10, or the third support member can be arranged between the first support member 121 and the second support member 122.

[0128] In the embodiment of the present application, a support component 12 and a first protective component 13 are provided in the battery 10, wherein the support component 12 includes a first support component 121 and a second support component 122 connected to each other. The first support component 121 and the second support component 122 are located on the same side of the battery cell 20, and the first support component 121 is located between the first wall 215 and the second support component 122 and attached to the first wall 215. The second support component 122 is provided with a second through hole 1221 corresponding to the pressure relief mechanism 213. The first protective component 13 is used to close the second Through hole 1221, the first protective component 13 is used to be destroyed when the pressure relief mechanism 213 is actuated, so that the emissions from the battery cell 20 pass through the second support component 122. In this way, when the battery cell 20 suffers from thermal runaway, the setting of the first protective component 13 can reduce the risk of emissions from the first protective component 13 away from the side of the pressure relief mechanism 213 flowing to the pressure relief mechanism 213 through the second through hole 1221, thereby reducing the thermal impact on the battery cell 20 and reducing the impact on the actuation performance of the pressure relief mechanism 213, thereby improving the performance of the battery 10.

[0129] In some implementations, as shown in Figures 5 and 6, the first protective member 13 is disposed on a surface of the second support member 122 away from the first wall 215. Thus, in the embodiment of the present application, when thermal runaway occurs in the battery cell 20, the first protective member 13 is destroyed when the pressure relief mechanism 213 of the battery cell 20 is actuated. This effectively reduces the risk of emissions from the first protective member 13 away from the pressure relief mechanism 213 flowing toward the pressure relief mechanism 213 through the second through hole 1221, thereby reducing the impact on the actuation performance of the pressure relief mechanism 213 and improving the performance of the battery 10. Furthermore, this configuration is simple and easy to manufacture.

[0130] Figure 7 shows a schematic structural diagram of a first protective component 13 provided in one embodiment of the present application. Figure 8 shows a schematic structural diagram of a first protective component 13 provided in another embodiment of the present application.

[0131] In some implementations, as shown in FIG. 7 and FIG. 8 , the first protective component 13 is provided with a first weak area 131 , which is configured to be destroyed by the exhaust when the pressure relief mechanism 213 is actuated, so that the exhaust passes through the first weak area 131 .

[0132] It should be understood that in the embodiment of the present application, at least a portion of at least one surface of the first protective component 13 perpendicular to the thickness direction of the first protective component 13 can be set as the first weak area 131, so that it can be destroyed by the emissions when the pressure relief mechanism 213 is actuated, so that the emissions pass through the first weak area 131.

[0133] It should also be understood that in the embodiment of the present application, in the direction perpendicular to the thickness of the first protective component 13, the shape of the first weak area 131 can be set according to actual needs. For example, the shape of the first weak area 131 can be set according to the shape of the pressure relief mechanism 213 of the battery cell 20. Exemplarily, the shape of the first weak area 131 includes but is not limited to a circle, an ellipse, a rectangle, and a regular polygon.

[0134] It should also be understood that the number of the first weak areas 131 provided on the first protective component 13 can be set according to actual needs. For example, the number of the first weak areas 131 can be one or more.

[0135] In the embodiment of the present application, a first weak area 131 is provided on the first protective component 13, and the first weak area 131 is configured to be destroyed by the discharge when the pressure relief mechanism 213 is actuated, that is, when the internal pressure or temperature of the battery cell 20 reaches a threshold value, the discharge can promptly and quickly pass through the first weak area 131 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 first protective component 13 close to the battery 10 on the actuation performance of the pressure relief mechanism 213, thereby improving the performance of the battery 10.

[0136] In some implementations, the first weak zone 131 satisfies at least one of the following: the melting point of the material of the first weak zone 131 is lower than the melting point of the material of the rest of the first protective component 13; the thickness of the first weak zone 131 is lower than the thickness of the rest of the first protective component 13; the surface of the first weak zone 131 in a direction perpendicular to the thickness of the first protective component 13 is provided with a notch.

[0137] It should be understood that in the embodiment of the present application, the melting point of the material at the first weak zone 131 can be set to be less than or equal to a preset threshold value. This allows the first weak zone 131 to be more easily melted by the exhaust released through the pressure relief mechanism 213 than the rest of the first protective component 13 when the pressure relief mechanism 213 is actuated. Furthermore, the thickness of the first weak zone 131 can be set to be less than the thickness of the rest of the first protective component 13. Because the first weak zone 131 is thinner than the rest of the first protective component 13, when the pressure relief mechanism 213 is actuated, the first weak zone 131 is more easily destroyed by the exhaust released through the pressure relief mechanism 213 than the rest of the first protective component 13.

[0138] It should also be understood that in the embodiment of the present application, the shape of the notch provided on the surface of the first weak zone 131 perpendicular to the thickness direction of the first protective component 13 can be set according to actual needs. For example, the notch includes but is not limited to a straight line notch, a cross notch, a rice notch, and an I-shaped notch.

[0139] In the embodiment of the present application, the first weak area 131 is configured to have at least one of the following: a material at the first weak area 131 has a lower melting point than a material of the remaining portion of the first protective component 13; a thickness of the first weak area 131 is less than the thickness of the remaining portion of the first protective component 13; and a notch is provided on a surface of the first weak area 131 perpendicular to the thickness direction of the first protective component 13. This makes the first weak area 131 more susceptible to damage by emissions from the battery cell 20 than the remaining portion of the first protective component 13. When the internal pressure or temperature of the battery cell 20 reaches a threshold, the emissions can promptly and quickly pass through the first weak area 131, thereby achieving rapid pressure relief of the battery cell 20. This reduces the impact of the emissions on the actuation performance of the pressure relief mechanism 213 caused by the accumulation of the emissions on the side of the first protective component 13 close to the battery cell 20, thereby improving the performance of the battery 10.

[0140] In some implementations, as shown in FIG. 7 and FIG. 8 , there are multiple pressure relief mechanisms 213 , and multiple first weak areas 131 are provided on the first protective component 13 . The multiple first weak areas 131 correspond one-to-one to the multiple pressure relief mechanisms 213 .

[0141] It should be understood that in the embodiment of the present application, the first protective component 13 can be a whole, or the first protective component can include multiple sub-protective components. For example, the first protective component 13 includes multiple sub-protective components, and each sub-protective component is provided with a first weak area 131 on at least one surface perpendicular to the first protective component 13, and each first weak area 131 corresponds one-to-one to each pressure relief mechanism 213.

[0142] In the embodiment of the present application, a plurality of first weak areas 131 are provided on the first protective component 13, and the plurality of first weak areas 131 correspond one-to-one to the plurality of pressure relief mechanisms 213. When thermal runaway occurs in the battery cell 20, that is, when the internal pressure or temperature of the battery cell 20 reaches a threshold value, the emissions generated by the battery cell 20 can promptly and quickly pass through the corresponding first weak area 131, so as to achieve rapid pressure relief of the battery cell 20, and at the same time reduce the influence of the emissions on the actuation performance of the pressure relief mechanisms 213 of other battery cells 20, thereby improving the performance of the battery 10.

[0143] In some implementations, on a plane perpendicular to the thickness direction of the first protective component 13 , the projection of the first protective component 13 covers the projection of the pressure relief mechanism 213 .

[0144] It should be understood that in the embodiment of the present application, the projection of the first protective component 13 or the pressure relief mechanism 213 on the plane perpendicular to the thickness direction of the first protective component 13 can be a positive projection in the thickness direction, or the projection of the first protective component 13 or the pressure relief mechanism 213 on the plane perpendicular to the thickness direction of the first protective component 13 can also be a projection in other directions.

[0145] In the embodiment of the present application, on a plane perpendicular to the thickness direction of the first protective component 13, by setting the projection of the first protective component 13 to cover the projection of the pressure relief mechanism 213, the first protective component 13 can further reduce the risk of emissions from the side of the first protective component 13 away from the pressure relief mechanism 213 flowing toward the pressure relief mechanism 213 through the first protective component 13, thereby reducing the impact on the actuation performance of the pressure relief mechanism 213, and further improving the performance of the battery 10.

[0146] In some implementations, the material of the first protective component 13 includes at least one of the following materials: polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin. Thus, in the embodiment of the present application, by setting the material of the first protective component 13 to include at least one of the following materials: polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin, the insulation performance of the first protective component 13 can be effectively improved, the risk of short circuits inside the battery 10 can be reduced, and the performance of the battery 10 can be improved.

[0147] Figure 9 shows a schematic cross-sectional view of a battery 10 according to another embodiment of the present application. Figure 10 shows a partial cross-sectional view of a battery 10 according to another embodiment of the present application. For example, Figure 10 may be an enlarged cross-sectional view of a corresponding portion of the battery 10 in Figure 9 .

[0148] In some embodiments, as shown in Figures 9 and 10, the battery 10 also includes: a second protective component 14, which is used to close the first through hole 1211, and the second protective component 14 is used to be destroyed when the pressure relief mechanism 213 is actuated to allow the emissions from the battery cell 20 to pass through the first support component 121. Thus, in the embodiment of the present application, by providing a second protective component 14 in the battery 10, the second protective component 14 is used to close the first through hole 1211, and the second protective component 14 is used to be destroyed when the pressure relief mechanism 213 is actuated, so that the emissions from the battery cell 20 pass through the first support component 121. When the battery cell 20 has thermal runaway, the provision of the second protective component 14 can reduce the risk of emissions from the second protective component 14 away from the side of the pressure relief mechanism 213 flowing toward the pressure relief mechanism 213 through the first through hole 1211, thereby reducing the thermal impact on the battery cell 20 and reducing the impact on the actuation performance of the pressure relief mechanism 213, thereby improving the performance of the battery 10.

[0149] In some implementations, as shown in Figures 9 and 10, the second protective member 14 is disposed on a surface of the first support member 121 away from the first wall 215. Thus, in the embodiment of the present application, when thermal runaway occurs in the battery cell 20, the second protective member 14 is destroyed when the pressure relief mechanism 213 of the battery cell 20 is actuated. This effectively reduces the risk of emissions from the second protective member 14 away from the pressure relief mechanism 213 flowing toward the pressure relief mechanism 213 through the first through hole 1211, thereby minimizing the impact on the actuation performance of the pressure relief mechanism 213 and improving the performance of the battery 10. Furthermore, this configuration is simple and easy to manufacture.

[0150] In some implementations, a second weak area 141 is provided on the second protective component 14 . The second weak area 141 is configured to be destroyed by the exhaust when the pressure relief mechanism 213 is actuated, so that the exhaust passes through the second protective component 14 .

[0151] It should be understood that in the embodiment of the present application, at least a portion of at least one surface of the second protective component 14 perpendicular to the thickness direction of the second protective component 14 can be set as the second weak area 141 so that it can be destroyed by the emissions when the pressure relief mechanism 213 is actuated, so that the emissions pass through the second weak area 141.

[0152] It should also be understood that in the embodiment of the present application, in the direction perpendicular to the thickness of the second protective component 14, the shape of the second weak area 141 can be set according to actual needs. For example, the shape of the second weak area 141 can be set according to the shape of the pressure relief mechanism 213 of the battery cell 20. Exemplarily, the shape of the second weak area 141 includes but is not limited to a circle, an ellipse, a rectangle, and a regular polygon.

[0153] It should also be understood that the number of the second weak areas 141 provided on the second protective component 14 can be set according to actual needs. For example, the number of the second weak areas 141 can be one or more.

[0154] In the embodiment of the present application, a second weak area 141 is provided on the second protective component 14, and the second weak area 141 is configured to be destroyed by the discharge when the pressure relief mechanism 213 is actuated, that is, when the internal pressure or temperature of the battery cell 20 reaches a threshold value, the discharge can promptly and quickly pass through the second weak area 141 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 second protective component 14 close to the battery 10 on the actuation performance of the pressure relief mechanism 213, thereby improving the performance of the battery 10.

[0155] In some implementations, the second weak zone satisfies at least one of the following: the melting point of the material of the second weak zone 141 is lower than the melting point of the material of the rest of the second protective component 14; the thickness of the second weak zone 141 is lower than the thickness of the rest of the second protective component 14; the surface of the second weak zone 141 perpendicular to the thickness direction of the second protective component 14 is provided with a notch.

[0156] It should be understood that in the embodiment of the present application, the melting point of the material at the second weak zone 141 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 second weak zone 141 is more easily melted by the exhaust discharged through the pressure relief mechanism 213 than the rest of the second protective component 14. Furthermore, the thickness of the second weak zone 141 can also be set to be less than the thickness of the rest of the second protective component 14. Because the second weak zone 141 is thinner than the rest of the second protective component 14, when the pressure relief mechanism 213 is actuated, the second weak zone 141 is more easily destroyed by the exhaust discharged through the pressure relief mechanism 213 than the rest of the second protective component 14.

[0157] It should also be understood that in the embodiment of the present application, the shape of the notch provided on the surface of the second weak zone 141 perpendicular to the thickness direction of the second protective component 14 can be set according to actual needs. For example, the notch includes but is not limited to a straight line notch, a cross notch, a rice notch, and an I-shaped notch.

[0158] In the embodiment of the present application, the second weak area 141 is configured to have at least one of the following: a material at the second weak area 141 has a lower melting point than a material of the rest of the second protective component 14; a thickness of the second weak area 141 is less than the thickness of the rest of the second protective component 14; and a notch is provided on a surface of the second weak area 141 perpendicular to the thickness of the second protective component 14. This makes the second weak area 141 more susceptible to damage by emissions from the battery cell 20 than the rest of the second protective component 14. When the internal pressure or temperature of the battery cell 20 reaches a threshold, the emissions can promptly and quickly pass through the second weak area 141, thereby achieving rapid pressure relief of the battery cell 20 and reducing the impact of the accumulation of emissions on the actuation performance of the pressure relief mechanism 213 of the second protective component 14 close to the battery cell 20, thereby improving the performance of the battery 10.

[0159] In some implementations, the material of the second protective component 14 includes at least one of the following materials: polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin. Thus, in the embodiment of the present application, by configuring the second protective component 14 to include at least one of the following materials: polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin, the insulation performance of the second protective component 14 can be effectively improved, reducing the risk of short circuits within the battery 10, thereby improving the performance of the battery 10.

[0160] Figure 11 shows a schematic cross-sectional view of a battery 10 according to another embodiment of the present application. Figure 12 shows a partial cross-sectional view of a battery 10 according to another embodiment of the present application. For example, Figure 12 may be an enlarged cross-sectional view of a corresponding portion of the battery 10 in Figure 11 .

[0161] In some embodiments, as shown in Figures 11 and 12, the battery 10 also includes: an isolation component 15, which is connected to the first support component 121, and the first support component 121 is attached to the first wall 215 through an adhesive 112, and the isolation component 15 is configured to prevent the adhesive 112 from being applied to the area where the pressure relief mechanism 213 is located.

[0162] It should be understood that in the embodiment of the present application, the adhesive 112 used to bond the first supporting component 121 to the first wall 215 includes but is not limited to polyurethane adhesive, acrylic adhesive, and silicone rubber adhesive.

[0163] In an embodiment of the present application, an isolation component 15 is provided in the battery 10, and the isolation component 15 is connected to the first support component 121. When the first support component 121 is attached to the first wall 215 by the adhesive 112, the isolation component 15 is configured to prevent the adhesive 112 from being applied to the area where the pressure relief mechanism 213 is located, which can effectively reduce the impact of the adhesive 112 entering the pressure relief mechanism 213 on the actuation performance of the pressure relief mechanism 213, thereby improving the performance of the battery 10.

[0164] In some embodiments, as shown in Figure 12, the isolation component 15 is provided with a groove 150 opening toward the battery cell 20, at least a portion of the side wall 151 of the groove 150 is located in the first through hole 1211, and the outer edge 152 of the groove 150 is connected to the side wall 151 and is arranged between the first support component 121 and the first wall 215.

[0165] In the embodiment of the present application, the isolation component 15 is set as a groove 150 with an opening toward the battery cell 20, at least a portion of the side wall 151 of the groove 150 is located in the first through hole 1211, and the outer edge 152 of the groove 150 is connected to the side wall 151 and is arranged between the first support component 121 and the first wall 215. When the first support component 121 is configured to be attached to the first wall 215 by an adhesive 112, the adhesive 112 can be effectively prevented from being applied between the first support component 121 and the pressure relief mechanism 213, effectively reducing the impact of the adhesive 112 entering the pressure relief mechanism 213 on the actuation performance of the pressure relief mechanism 213, thereby improving the performance of the battery 10.

[0166] In some implementations, the bottom wall 153 of the groove 150 is configured to be broken by the exhaust when the pressure relief mechanism 213 is actuated, so that the exhaust passes through the isolation component 15 .

[0167] It should be understood that in the embodiment of the present application, the shape of the bottom wall 153 of the groove 150 can be set according to actual needs. For example, the shape of the bottom wall 153 of the groove 150 can be set according to the shape of the first through hole 1211 or the shape of the pressure relief mechanism 213 of the battery cell 20. Exemplarily, the shape of the bottom wall 153 of the groove 150 includes but is not limited to a circle, an ellipse, a rectangle, and a regular polygon.

[0168] In the embodiment of the present application, the bottom wall 153 of the groove 150 is configured to be destroyed by the emissions discharged from the battery cell 20 when the pressure relief mechanism 213 is actuated, and the emissions are allowed to pass through the isolation component 15, so that the emissions can be discharged in a timely manner, reducing the impact of the accumulation of the emissions in the groove 150 on the actuation performance of the pressure relief mechanism 213, thereby reducing the thermal impact on the battery cell 20 and improving the performance of the battery 10.

[0169] In some implementations, as shown in FIG. 12 , the bottom wall 153 of the groove 150 is provided with a third weakened area 154 , which is configured to be destroyed by the exhaust when the pressure relief mechanism 213 is actuated, so that the exhaust passes through the isolation component 15 .

[0170] It should be understood that in the embodiment of the present application, at least a portion of at least one surface of the bottom wall 153 of the groove 150 in a thickness direction perpendicular to the bottom wall 153 can be set as the third weak zone 154 so that it can be destroyed by the discharge when the pressure relief mechanism 213 is actuated, so that the discharge can pass through the isolation component 15.

[0171] It should also be understood that in the embodiment of the present application, in the thickness direction perpendicular to the bottom wall 153, the shape of the third weak zone 154 can be set according to actual needs. For example, the shape of the third weak zone 154 can be set according to the shape of the pressure relief mechanism 213 of the battery cell 20. Exemplarily, the shape of the third weak zone 154 includes but is not limited to a circle, an ellipse, a rectangle, and a regular polygon.

[0172] It should also be understood that the number of the third weak areas 154 provided on the bottom wall 153 of the groove 150 can be set according to actual needs. For example, the number of the third weak areas 154 can be one or more.

[0173] In an embodiment of the present application, a third weak area 154 is provided on the bottom wall 153 of the groove 150, and the third weak area 154 is configured to be destroyed by the discharge when the pressure relief mechanism 213 is actuated, that is, when the internal pressure or temperature of the battery cell 20 reaches a threshold value, the discharge can pass through the isolation component 15 in a timely and rapid manner to achieve rapid pressure relief of the battery cell 20, reduce the impact of the accumulation of the discharge in the groove 150 on the actuation performance of the pressure relief mechanism 213, and thereby improve the performance of the battery 10.

[0174] In some implementations, the third weak zone 154 satisfies at least one of the following: the melting point of the material of the third weak zone 154 is lower than the melting point of the material of the rest of the isolation component 15; the thickness of the third weak zone 154 is lower than the thickness of the rest of the isolation component 15; the surface of the third weak zone 154 perpendicular to the thickness direction of the isolation component 15 is provided with notches.

[0175] It should be understood that in the embodiment of the present application, the melting point of the material at the third weak zone 154 can be set to be less than or equal to a preset threshold value. This allows the third weak zone 154 to be more easily melted by the exhaust released through the pressure relief mechanism 213 than the rest of the isolation component 15 when the pressure relief mechanism 213 is actuated. Furthermore, the thickness of the third weak zone 154 can be set to be thinner than the thickness of the rest of the isolation component 15. Because the third weak zone 154 is thinner than the rest of the isolation component 15, when the pressure relief mechanism 213 is actuated, the third weak zone 154 is more easily destroyed by the exhaust released through the pressure relief mechanism 213 than the rest of the isolation component 15.

[0176] It should also be understood that in the embodiment of the present application, the shape of the notch provided on the surface of the third weak zone 154 perpendicular to the thickness direction of the isolation component 15 can be set according to actual needs. For example, the notch includes but is not limited to a straight line notch, a cross notch, a rice notch, and an I-shaped notch.

[0177] In the embodiment of the present application, the third weak zone 154 is set to at least one of the following: the melting point of the material of the third weak zone 154 is lower than the melting point of the material of the rest of the isolation component 15; the thickness of the third weak zone 154 is lower than the thickness of the rest of the isolation component 15; the surface of the third weak zone 154 perpendicular to the thickness direction of the isolation component 15 is provided with a notch, so that the third weak zone 154 is more easily destroyed by the discharge of the battery cell 20 than the rest of the isolation component 15, and when the internal pressure or temperature of the battery cell 20 reaches a threshold value, the discharge can pass through the third weak zone 154 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 isolation component 15 close to the battery cell 20 on the actuation performance of the pressure relief mechanism 213, thereby improving the performance of the battery 10.

[0178] In some implementations, as shown in FIG. 11 and FIG. 12 , the battery 10 further includes: a third protective component 16 connected to a surface of the isolation component 15 facing away from the pressure relief mechanism 213 to protect the isolation component 15 .

[0179] It should be understood that in the embodiment of the present application, the third protective component 16 and the isolation component 15 can be adhesively connected. For example, the third protective component 16 and the isolation component 15 can be connected by an adhesive 112.

[0180] It should also be understood that in the embodiment of the present application, the shape of the third protective component 16 along the thickness direction perpendicular to the bottom wall 153 of the groove 150 can be set according to actual needs. For example, the shape of the third protective component 16 along the thickness direction perpendicular to the bottom wall 153 of the groove 150 can be set according to the shape of the bottom wall 153 of the groove 150. Exemplarily, the shape of the third protective component 16 along the thickness direction perpendicular to the bottom wall 153 of the groove 150 includes but is not limited to a circle, an ellipse, a rectangle, and a regular polygon.

[0181] It should also be understood that in the embodiment of the present application, the material of the third protective component 16 includes at least one of the following materials: polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin. Thus, in the embodiment of the present application, by configuring the third protective component 16 to include at least one of the following materials: polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin, the insulation performance, heat resistance, and chemical stability of the third protective component 16 can be improved, thereby effectively reducing the possibility of damage to the surface of the isolation component 15 facing away from the pressure relief mechanism 213 under conditions such as vibration, impact, and high temperature, thereby improving the performance of the battery 10. In an embodiment of the present application, a third protective component 16 is provided in the battery 10, and the third protective component 16 is connected to the surface of the isolation component 15 facing away from the pressure relief mechanism 213, so that the third protective component 16 can protect the isolation component 15, thereby reducing the possibility of damage to the surface of the isolation component 15 facing away from the pressure relief mechanism 213 when subjected to vibration, impact, high temperature, etc., thereby improving the performance of the battery 10.

[0182] In some implementations, the isolation component 15 and the third protective component 16 are 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 isolation component 15 and the third protective component 16. Thus, in the embodiment of the present application, by configuring the isolation component 15 and the third protective component 16 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 isolation component 15 and the third protective component 16, during the actuation of the pressure relief mechanism 213, the discharge discharged from the pressure relief mechanism 213 can smoothly pass through the isolation component 15 and the third protective component 16 and be discharged from the electrical cavity of the battery 10, thereby reducing the thermal impact on the battery cell 20 and improving the performance of the battery 10.

[0183] In some implementations, the melting point of the third protective component 16 is greater than the melting point of the isolation component 15. Thus, in the embodiment of the present application, by connecting the third protective component 16 to the surface of the isolation component 15 facing away from the pressure relief mechanism 213 and setting the melting point of the third protective component 16 to be greater than the melting point of the isolation component 15, the possibility of damage to the surface of the isolation component 15 facing away from the pressure relief mechanism 213 due to vibration, impact, high temperature, etc. can be reduced, thereby improving the performance of the battery 10.

[0184] Referring again to Figures 4 to 8 above, a battery 10 is provided, comprising: a battery cell 20, a support component 12, and a first 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 used to support the battery cell 20. The support component 12 includes a first support component 121 and a second support component 122 connected to each other. The first support component 121 and the second support component 122 are located on the same side of the battery cell 20. The first support component 121 is located between the first wall 215 and the second support component 122 and is attached to the battery cell 20. Connected to the first wall 215, the first support member 121 is provided with a first through-hole 1211 corresponding to the pressure relief mechanism 213, and the second support member 122 is provided with a second through-hole 1221 corresponding to the pressure relief mechanism 213. The first protective member 13 is used to close the second through-hole 1221 and is configured to be destroyed when the pressure relief mechanism 213 is actuated, allowing emissions from the battery cells 20 to pass through the second support member 122. The first protective member 13 is disposed on a surface of the second support member 122 away from the first wall 215. The first protective member 13 is provided with a first weakened area 131, which is configured to be destroyed by emissions when the pressure relief mechanism 213 is actuated, allowing the emissions to pass through the first weakened area 131. The first protective member 13 is provided with a plurality of first weakened areas 131, each corresponding to a plurality of pressure relief mechanisms 213.

[0185] 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 .

[0186] 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.

[0187] Although the present application has been described with reference to the above-described embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope 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 encompasses 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 component (12) for supporting the battery cell (20), the support component (12) comprising a first support component (121) and a second support component (122) connected to each other, the first support component (121) and the second support component (122) being located on the same side of the battery cell (20), the first support component (121) being located between the first wall (215) and the second support component (122) and being attached to the first wall (215), the first support component (121) being provided with a first through hole (1211) corresponding to the pressure relief mechanism (213), and the second support component (122) being provided with a second through hole (1221) corresponding to the pressure relief mechanism (213); A first protective component (13), the first protective component (13) is used to close the second through hole (1221), and the first protective component (13) is used to be destroyed when the pressure relief mechanism (213) is actuated to allow the discharge from the battery cell (20) to pass through the second supporting component (122).

2. The battery according to claim 1, characterized in that The first protection component (13) is arranged on a surface of the second support component (122) away from the first wall (215).

3. The battery according to claim 1 or 2, characterized in that: The first protective component (13) is provided with a first weak area (131), and the first weak area (131) is configured to be destroyed by the exhaust when the pressure relief mechanism (213) is actuated, so that the exhaust passes through the first weak area (131).

4. The battery according to claim 3, characterized in that The first weak zone (131) satisfies at least one of the following: The melting point of the material of the first weak area (131) is lower than the melting point of the material of the remaining part of the first protective component (13); The thickness of the first weak area (131) is smaller than the thickness of the remaining part of the first protective component (13); A surface of the first weak area (131) in a direction perpendicular to the thickness of the first protective component (13) is provided with notches.

5. The battery according to claim 3 or 4, characterized in that: The number of the pressure relief mechanisms (213) is plural, and the first protective component (13) is provided with a plurality of the first weak areas (131), and the plurality of the first weak areas (131) correspond one-to-one to the plurality of the pressure relief mechanisms (213).

6. The battery according to any one of claims 1 to 5, characterized in that On a plane perpendicular to the thickness direction of the first protective component (13), the projection of the first protective component (13) covers the projection of the pressure relief mechanism (213).

7. The battery according to any one of claims 1 to 6, characterized in that The battery also includes: a second protective component (14), the second protective component (14) being used for closing the first through hole (1211), The second protection component (14) is configured to be destroyed when the pressure relief mechanism (213) is actuated, so that the discharge from the battery cell (20) passes through the first support component (121).

8. The battery according to claim 7, characterized in that The second protection component (14) is arranged on a surface of the first supporting component (121) away from the first wall (215).

9. The battery according to claim 7 or 8, characterized in that: The second protective component (14) is provided with a second weak area (141), and the second weak area (141) is configured to be destroyed by the exhaust when the pressure relief mechanism (213) is actuated, so that the exhaust passes through the second protective component (14).

10. The battery according to claim 9, characterized in that The second weak area (141) satisfies at least one of the following: The melting point of the material of the second weak area (141) is lower than the melting point of the material of the remaining part of the second protective component (14); The thickness of the second weak area (141) is smaller than the thickness of the remaining part of the second protective component (14); A surface of the second weak area (141) in a direction perpendicular to the thickness of the second protective component (14) is provided with notches.

11. The battery according to any one of claims 1 to 6, characterized in that The battery also includes: An isolation component (15), the isolation component (15) is connected to the first support component (121), the first support component (121) is attached to the first wall (215) by an adhesive (112), and the isolation component (15) is configured to prevent the adhesive (112) from being applied to the area where the pressure relief mechanism (213) is located.

12. The battery according to claim 11, characterized in that The isolation component (15) is provided with a groove (150) opening toward the battery cell (20); at least a portion of a side wall (151) of the groove (150) is located in the first through hole (1211); an outer edge (152) of the groove (150) is connected to the side wall (151) and is arranged between the first support component (121) and the first wall (215).

13. The battery according to claim 12, characterized in that The bottom wall (153) of the groove (150) is configured to be broken by the exhaust when the pressure relief mechanism (213) is actuated, so that the exhaust passes through the isolation component (15).

14. The battery according to claim 13, characterized in that The bottom wall (153) of the groove (150) is provided with a third weak area (154), and the third weak area (154) is configured to be destroyed by the discharge when the pressure relief mechanism (213) is actuated, so that the discharge passes through the isolation component (15).

15. The battery according to claim 14, characterized in that The third weak zone (154) satisfies at least one of the following: The melting point of the material of the third weak zone (154) is lower than the melting point of the material of the remaining part of the isolation component (15); The thickness of the third weak zone (154) is smaller than the thickness of the remaining portion of the isolation component (15); The surface of the third weak zone (154) perpendicular to the thickness direction of the isolation component (15) is arranged There are notches.

16. The battery according to any one of claims 11 to 15, characterized in that The battery also includes: A third protective component (16) is connected to a surface of the isolation component (15) that faces away from the pressure relief mechanism (213) to protect the isolation component (15).

17. The battery according to claim 16, characterized in that The isolation component (15) and the third protection component (16) are configured to be destroyed by emissions from the battery cell (20) when the pressure relief mechanism (213) is actuated, so that the emissions pass through the isolation component (15) and the third protection component (16).

18. The battery according to claim 16 or 17, characterized in that: The melting point of the third protection component (16) is greater than the melting point of the isolation component (15).

19. The battery according to any one of claims 1 to 18, characterized in that The material of the first protective component is one of the following materials: polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, polyethylene epoxy resin.

20. An electrical equipment, characterized in that: include: The battery according to any one of claims 1 to 19, wherein the battery is used to provide electrical energy to the electrical device.

21. An energy storage device, characterized in that: include: The battery according to any one of claims 1 to 19, wherein the battery is used to store electrical energy for the energy storage device.

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