Batteries, power consumption devices, and energy storage devices

Abstract

Embodiments of the present application provide a battery, a power consumption device, and an energy storage device that can improve the performance of the battery. The battery includes a battery cell, a support member, and a first protective member, wherein a depressurization mechanism is provided in the first wall of the battery cell, the support member is used to support the battery cell, the support member includes a first support member and a second support member connected to each other, the first support member and the second support member are located on the same side of the battery cell, the first support member is located between the first wall and the second support member and is adhered to the first wall, the first support member is provided with a first through-hole corresponding to the depressurization mechanism, the second support member is provided with a second through-hole corresponding to the depressurization mechanism, the first protective member is used to seal the second through-hole, the first protective member is destroyed when the depressurization mechanism is activated and is used to allow waste from the battery cell to pass through the second support member.

Description

Technical Field

[0001] Cross - reference to Related Applications This application claims the priority of a Chinese patent application with application number 202323180881.3 and title "Battery, Power Consumption Device and Energy Storage Device", filed on November 24, 2023, and the entire content of the application is incorporated herein by reference.

[0002] The embodiments of this application relate to the field of battery technology, particularly to batteries, power consumption devices and energy storage devices.

Background Art

[0003] With the increasing severity of environmental pollution, the new energy industry has been attracting more and more attention. In the new energy industry, battery technology is an important element related to its development. In the development of battery technology, in addition to improving the electrical characteristics of the battery, safety issues are also problems that cannot be ignored. If the safety issues of the battery cannot be guaranteed, the battery cannot be used, which will reduce the use performance of the battery.

Summary of the Invention

Problems to be Solved by the Invention

[0004] Therefore, how to improve the use performance of the battery has become an urgent technical problem to be solved in this field.

Means for Solving the Problems

[0005] The embodiments of this application provide a battery, a power consumption device and an energy storage device that can improve the use performance of the battery.

[0006] According to a first embodiment, a battery is provided including a battery cell, a support member and a first protective member, wherein a depressurization mechanism is provided in the first wall of the battery cell, the support member is used to support the battery cell, the support member includes a first support member and a second support member connected to each other, the first support member and the second support member are located on the same side of the battery cell, the first support member is located between the first wall and the second support member and is adhered to the first wall, the first support member is provided with a first through hole corresponding to the depressurization mechanism, the second support member is provided with a second through hole corresponding to the depressurization mechanism, the first protective member is used to seal the second through hole, the first protective member is destroyed when the depressurization mechanism is activated and is used to allow discharge from the battery cell to pass through the second support member.

[0007] In the embodiment of the present application, the battery is provided with a support member and a first protective member, the support member includes a first support member and a second support member connected to each other, the first support member and the second support member are located on the same side of the battery cell, the first support member is located between the first wall and the second support member and is adhered to the first wall, the second support member is provided with a second through-hole corresponding to the depressurization mechanism, the first protective member is used to seal the second through-hole, the first protective member is destroyed when the depressurization mechanism is activated and is used to allow discharge from the battery cell to pass through the second support member. In this way, when the battery cell experiences thermal runaway, the provision of the first protective member reduces the risk that discharge from the side of the first protective member away from the depressurization mechanism will pass through the second through-hole and flow into the depressurization mechanism, thereby suppressing the thermal effects on the battery cell, suppressing the impact on the operating performance of the depressurization mechanism, and thereby improving the usability of the battery.

[0008] In some embodiments, the first protective member is provided on a surface of the second support member that is away from the first wall. In this way, in the embodiments of the present application, when the battery cell experiences thermal runaway, the first protective member is destroyed when the depressurization mechanism of the battery cell is activated. This effectively reduces the risk of waste discharged from the side of the first protective member away from the depressurization mechanism passing through the second through-hole and flowing into the depressurization mechanism, thereby minimizing the impact on the operating performance of the depressurization mechanism, improving the battery's performance, and providing a simple installation method that is easy to process and manufacture.

[0009] In some embodiments, the first protective member is provided with a first vulnerable region, which is configured to be destroyed by the discharge when the decompression mechanism is activated, allowing the discharge to pass through the first vulnerable region.

[0010] In the embodiment of the present invention, the first protective member is provided with a first vulnerable region, and the first vulnerable region is configured to be destroyed by discharge when the depressurization mechanism is activated. That is, the discharge is configured to pass through the first vulnerable region immediately and quickly when the internal pressure or temperature of the battery cell reaches a threshold, thereby enabling rapid depressurization of the battery cell, preventing the discharge from accumulating on the side of the first protective member closer to the battery's depressurization mechanism and affecting the operating performance of the depressurization mechanism, thereby improving the battery's performance.

[0011] In some embodiments, the first vulnerable region satisfies at least one of the following conditions: the melting point of the material in the first vulnerable region is lower than the melting point of the material in the rest of the first protective member; the thickness of the first vulnerable region is thinner than the thickness of the rest of the first protective member; and shallow grooves are provided on the surface of the first vulnerable region perpendicular to the thickness direction of the first protective member.

[0012] In the embodiment of the present application, the first vulnerable region is set to satisfy at least one of the following conditions: the melting point of the material in the first vulnerable region is lower than the melting point of the material in the remaining part of the first protective member; the thickness of the first vulnerable region is thinner than the thickness of the remaining part of the first protective member; and shallow grooves are provided on the surface of the first vulnerable region perpendicular to the thickness direction of the first protective member. As a result, the first vulnerable region is more easily destroyed by battery cell waste than the remaining part of the first protective member, and when the internal pressure or temperature of the battery cell reaches a threshold, the waste can pass through the first vulnerable region immediately and quickly, enabling rapid depressurization of the battery cell. This also prevents the waste from accumulating on the side of the first protective member closer to the battery cell depressurization mechanism, thereby preventing it from affecting the operation of the depressurization mechanism and improving the battery's performance.

[0013] In some embodiments, there are multiple pressure reduction mechanisms, and the first protective member is provided with multiple first vulnerable regions, with each of the multiple first vulnerable regions corresponding to each of the multiple pressure reduction mechanisms in a one-to-one correspondence. In this way, in the embodiments of the present application, by providing the first protective member with multiple first vulnerable regions, and each of the multiple first vulnerable regions corresponding to each of the multiple pressure reduction mechanisms in a one-to-one correspondence, when a battery cell experiences thermal runaway, that is, when the internal pressure or temperature of the battery cell reaches a threshold, the discharge generated by the battery cell can immediately and quickly pass through the corresponding first vulnerable region, thereby achieving rapid pressure reduction of the battery cell and suppressing the effect of the discharge on the operating performance of the pressure reduction mechanisms of other battery cells, thereby improving the battery's performance.

[0014] In some embodiments, in a plane perpendicular to the thickness direction of the first protective member, the projection of the first protective member covers the projection of the depressurization mechanism.

[0015] In the embodiment of the present application, by setting the projection of the first protective member to cover the projection of the decompression mechanism in a plane perpendicular to the thickness direction of the first protective member, the risk of discharge from the side of the first protective member away from the decompression mechanism passing through the first protective member and flowing into the decompression mechanism can be further reduced, thereby reducing the impact on the operating performance of the decompression mechanism and further improving the battery's performance.

[0016] In some embodiments, the battery further includes a second protective member used to seal the first through-hole, which is destroyed when the depressurization mechanism is activated to allow waste from the battery cell to pass through the first support member.

[0017] In the embodiment of the present application, the battery is provided with a second protective member, which is used to seal the first through-hole, and which is destroyed when the depressurization mechanism is activated, allowing discharge from the battery cell to pass through the first support member. By providing the second protective member when the battery cell experiences thermal runaway, the risk of discharge from the side of the second protective member away from the depressurization mechanism passing through the first through-hole and flowing into the depressurization mechanism is reduced, the thermal impact on the battery cell is reduced, the impact on the operating performance of the depressurization mechanism is reduced, and the usability of the battery is improved.

[0018] In some embodiments, the second protective member is provided on a surface of the first support member that is away from the first wall. In this way, in the embodiments of the present application, when the battery cell experiences thermal runaway, the second protective member is destroyed when the depressurization mechanism of the battery cell is activated. This effectively reduces the risk of waste discharged from the side of the second protective member away from the depressurization mechanism passing through the first through-hole and flowing into the depressurization mechanism, thereby minimizing the impact on the operating performance of the depressurization mechanism, improving the battery's performance, and providing a simple installation method that is easy to process and manufacture.

[0019] In some embodiments, the second protective member is provided with a second vulnerable region, which is configured to be destroyed by the discharge when the decompression mechanism is activated, allowing the discharge to pass through the second protective member.

[0020] In the embodiment of the present invention, the second protective member is provided with a second vulnerable region, and the second vulnerable region is configured to be destroyed by discharge when the depressurization mechanism is activated. That is, when the internal pressure or temperature of the battery cell reaches a threshold, the discharge is configured to pass through the second vulnerable region immediately and quickly, thereby achieving rapid depressurization of the battery cell, preventing the discharge from accumulating on the side of the second protective member closer to the battery's depressurization mechanism and affecting the operating performance of the depressurization mechanism, thereby improving the battery's performance.

[0021] In some embodiments, the second weak region satisfies at least one of the following conditions: the melting point of the material in the second weak region is lower than the melting point of the material in the rest of the second protective member; the thickness of the second weak region is thinner than the thickness of the rest of the second protective member; and shallow grooves are provided on the surface of the second weak region perpendicular to the thickness direction of the second protective member.

[0022] In the embodiment of the present application, the second vulnerable region is set to satisfy at least one of the following conditions: the melting point of the material in the second vulnerable region is lower than the melting point of the material in the remaining part of the second protective member; the thickness of the second vulnerable region is thinner than the thickness of the remaining part of the second protective member; and shallow grooves are provided on the surface of the second vulnerable region perpendicular to the thickness direction of the second protective member. As a result, the second vulnerable region is more easily destroyed by battery cell waste than the remaining part of the second protective member, and when the internal pressure or temperature of the battery cell reaches a threshold, the waste can pass through the second vulnerable region immediately and quickly, enabling rapid depressurization of the battery cell. This also prevents the waste from accumulating on the side of the second protective member closer to the battery cell depressurization mechanism, thereby reducing the operating performance of the depressurization mechanism and improving the battery's performance.

[0023] In some embodiments, the battery further includes an isolation member, the isolation member is connected to the first support member, the first support member is adhered to the first wall by an adhesive, and the isolation member is configured to prevent the adhesive from being applied to the region where the decompression mechanism is located.

[0024] In an embodiment of the present application, when an isolation member is provided in the battery and the isolation member is connected to the first support member, so that the first support member is adhered to the first wall by an adhesive, the isolation member is configured to prevent the adhesive from being applied to the region where the decompression mechanism is located, effectively suppressing the influence on the operating performance of the decompression mechanism when the adhesive enters the decompression mechanism, and further improving the use performance of the battery.

[0025] In some embodiments, the isolation member is provided with a concave groove opening towards the battery cell, at least a part of the side walls of the concave groove are located within the first through hole, the outer edge of the concave groove is connected to the side walls, and is provided between the first support member and the first wall.

[0026] In an embodiment of the present application, when the isolation member is configured as a concave groove opening towards the battery cell, at least a part of the side walls of the concave groove are located within the first through hole 1, the outer edge of the concave groove is connected to the side walls and is provided between the first support member and the first wall, so that the first support member is adhered to the first wall by an adhesive, the adhesive is effectively prevented from being applied between the support member and the decompression mechanism, the influence on the operating performance of the decompression mechanism caused by the adhesive entering the decompression mechanism is effectively reduced, and the use performance of the battery can be improved. 1 In some embodiments, the bottom wall of the concave groove is configured to be broken by the discharge when the decompression mechanism operates, so that the discharge passes through the isolation member.

[0027]

[0028] ​In an embodiment of the present application, the bottom wall of the concave groove is destroyed by the discharge from the battery cell when the decompression mechanism operates, and the discharge is configured to pass through the isolation member, so that the discharge is immediately discharged, the discharge is prevented from accumulating in the concave groove and affecting the operating performance of the decompression mechanism, the influence of heat on the battery cell is suppressed, and the usage performance of the battery can be improved.

[0029] In some embodiments, a third weak area is provided on the bottom wall of the concave groove, and the third weak area is configured to be destroyed by the discharge when the decompression mechanism operates, so that the discharge passes through the isolation member.

[0030] In an embodiment of the present application, a third weak area is provided on the bottom wall of the concave groove, and the third weak area is configured to be destroyed by the discharge when the decompression mechanism operates, that is, when the internal pressure or temperature of the battery cell reaches a threshold value, the discharge is configured to pass through the isolation member immediately and quickly, so as to achieve rapid decompression of the battery cell, effectively prevent the discharge from accumulating in the concave groove and affecting the operating performance of the decompression mechanism, and improve the usage performance of the battery.

[0031] In some embodiments, the third weak area satisfies at least one of the following conditions: the melting point of the material of the third weak area is lower than the melting point of the material of the remaining part of the isolation member; the thickness of the third weak area is thinner than the thickness of the remaining part of the isolation member; and shallow grooves are provided on the surface of the third weak area perpendicular to the thickness direction of the isolation member.

[0032] In the embodiment of the present application, the third vulnerable region is configured such that at least one of the following conditions is met: the melting point of the material in the third vulnerable region is lower than the melting point of the material in the remaining part of the isolation member; the thickness of the third vulnerable region is thinner than the thickness of the remaining part of the isolation member; and shallow grooves are provided on the surface of the third vulnerable region perpendicular to the thickness direction of the isolation member. As a result, the third vulnerable region is more easily destroyed by battery cell waste than the remaining part of the isolation member, and when the internal pressure or temperature of the battery cell reaches a threshold, the waste can pass through the third vulnerable region immediately and quickly, enabling rapid depressurization of the battery cell. This also prevents the waste from accumulating on the side of the isolation member closer to the battery cell depressurization mechanism, thereby reducing the operating performance of the depressurization mechanism and improving the battery's performance.

[0033] In some embodiments, the battery further includes a third protective member connected to a surface of the isolation member away from the depressurization mechanism, thereby protecting the isolation member.

[0034] In the embodiment of the present invention, a third protective member is provided inside the battery, and the third protective member is connected to a surface of the isolation member away from the depressurization mechanism. This allows the third protective member to protect the isolation member, reducing the possibility of damage to the surface of the isolation member away from the depressurization mechanism when subjected to vibration, shock, high temperature, etc., thereby improving the battery's performance.

[0035] In some embodiments, the isolation member and the third protective member are configured to be destroyed by the discharge from the battery cell when the depressurization mechanism is activated, allowing the discharge to pass through the isolation member and the third protective member.

[0036] In the embodiment of the present application, the isolation member and the third protective member are configured to be destroyed by the discharge from the battery cell when the depressurization mechanism is activated, allowing the discharge to pass through the isolation member and the third protective member. As a result, during the operation of the depressurization mechanism, the discharge from the depressurization mechanism passes smoothly through the isolation member and the third protective member and is discharged from the electrical cavity of the battery, reducing the thermal impact on the battery cell and improving the battery's performance.

[0037] In some embodiments, the melting point of the third protective member is higher than that of the isolation member.

[0038] In the embodiment of the present invention, the third protective member is connected to a surface of the isolation member away from the depressurization mechanism, and the melting point of the third protective member is set higher than that of the isolation member. This reduces the possibility of damage to the surface of the isolation member away from the depressurization mechanism when subjected to vibration, shock, high temperature, etc., thereby improving the battery's performance.

[0039] In some embodiments, the material of the first protective member is one of the following: polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, or polyethylene epoxy resin. at least There is one. In this way, in the embodiment of the present application, the material of the first protective member is one of the following: polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, polyethylene epoxy resin. at least By setting it to be one, the insulation performance of the first protective member can be effectively improved, the risk of short circuits occurring inside the battery can be reduced, and the battery's performance can be further improved.

[0040] According to the second aspect, a power consumption device is provided which includes a battery described in any embodiment of the first aspect, the battery being used to supply electrical energy to the power consumption device.

[0041] In some embodiments, the power consumption device may be a vehicle, a ship, or a spacecraft.

[0042] According to a third aspect, an energy storage device is provided which includes a battery as described in any embodiment of the first aspect, the battery being used to store electrical energy in the energy storage device. [Brief explanation of the drawing]

[0043] To more clearly explain the technical solutions in the embodiments of this application, the necessary drawings for the embodiments are briefly described below. It should be understood that the drawings shown below represent only a few embodiments of this application, and those skilled in the art can obtain further drawings based on these drawings without requiring any creative effort.

[0044] [Figure 1] This is a schematic diagram of the structure of a vehicle according to one embodiment of the present invention. [Figure 2] This is a schematic diagram of the structure of a battery according to one embodiment of the present invention. [Figure 3] This is a schematic diagram of the structure of a battery cell according to one embodiment of the present invention. [Figure 4] This is a schematic diagram of the disassembled structure of a battery according to another embodiment of the present invention. [Figure 5] This is a schematic cross-sectional view of a battery according to one embodiment of the present invention. [Figure 6] This is a schematic diagram of a partial cross-section of a battery according to one embodiment of the present invention. [Figure 7] This is a schematic diagram of the structure of the first protective member according to one embodiment of the present invention. [Figure 8] This is a schematic diagram of the structure of the first protective member according to another embodiment of the present application. [Figure 9] This is a schematic cross-sectional view of a battery according to another embodiment of the present invention. [Figure 10] This is a schematic cross-sectional view of a battery according to another embodiment of the present invention. [Figure 11] This is a schematic cross-sectional view of a battery according to another embodiment of the present invention. [Figure 12] This is a schematic cross-sectional view of a battery according to another embodiment of the present invention.

[0045] In drawings, the drawings are not drawn according to actual proportions. [Modes for carrying out the invention]

[0046] Embodiments of the present application will be described in more detail below with reference to the drawings and examples. The detailed description of the embodiments and drawings below 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, and the embodiments of the present application are not limited to those described.

[0047] Unless otherwise defined, all technical and scientific terms used in the embodiments of this application have the same meaning as those generally understood by those skilled in the art, and the terms used herein are intended solely to describe specific embodiments and not to limit the embodiments of this application. The terms “including” and “having” and their synonyms in the description and claims of this application and in the description of the drawings above are intended to be non-exclusive.

[0048] In the description of the embodiments of this application, technical terms such as "first," "second," etc., are merely used to distinguish different subjects and should not be understood as implicitly indicating the quantity, specific order, or hierarchical relationship of technical features that show, imply, or are shown in relative importance. In the description of the embodiments of this application, unless otherwise specifically limited, "multiple" means two or more.

[0049] As used herein, “Examples” means that certain features, structures, or properties described in relation to the Examples may be included in at least one Example of this Application. Where the term “Examples” appears elsewhere in this Specification, it does not necessarily refer to the same Example, nor does it refer to an Example that is mutually exclusive, independent, or substitutable with other Examples. Those skilled in the art will understand, both explicitly and implicitly, that the Examples described herein can be combined with other Examples.

[0050] The term "and / or" in the description of the embodiments of this application merely describes the relationship between related objects, indicating that three types of relationships are possible. For example, A and / or B can represent three situations: A existing alone, A and B existing simultaneously, and B existing alone. In this specification, the symbol " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0051] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more sets (including two sets), and "multiple sheets" refers to two or more sheets (including two sheets).

[0052] In the description of the embodiments of this application, terms such as "center," "vertical direction," "horizontal direction," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "upper part," "bottom," "inside," "outside," "clockwise," "counterclockwise," "axial direction," "radial direction," and "circumferential direction" indicate directions or positional relationships that are based on the directions or positional relationships shown in the drawings and are merely for the purpose of simplifying and making it easier to explain the embodiments of this application. They do not indicate or imply that the device or element in question has a specific direction, or that it should be composed of and operated in a specific direction, and therefore should not be understood as limiting the embodiments of this application.

[0053] In the description of the embodiments of this application, unless otherwise specifically defined and limited, technical terms such as “attached,” “connected,” “connected,” and “fixed” should be understood in a broad sense. For example, they may be fixed connections, removable connections, or integral connections. They may be mechanical connections or electrical connections. They may be directly connected, indirectly connected via an intermediate medium, or be internal communication between two elements or an interaction relationship between two elements. Those skilled in the art will be able to understand the specific meaning of the above terms in the embodiments of this application depending on the specific circumstances.

[0054] As used herein, “Examples” means that certain features, structures, or properties described in relation to the Examples may be included in at least one Example of this Application. Where the term “Examples” appears elsewhere in this Specification, it does not necessarily refer to the same Example, nor does it refer to an Example that is mutually exclusive, independent, or substitutable with other Examples. Those skilled in the art will understand, both explicitly and implicitly, that the Examples described herein can be combined with other Examples.

[0055] In the embodiments of this application, a battery refers to a physical module containing one or more battery cells for providing electrical energy. For example, a battery as referred to here may include a battery module or a battery pack. A battery generally includes a housing for packaging one or more battery cells. The housing can reduce the influence of liquids or other foreign matter on the charging and discharging of the battery cells.

[0056] As should be understood, the battery cells in the embodiments of this 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-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0057] In some embodiments, the battery cell in the embodiments of the present application may be a metal battery, and specifically, the metal battery may include a lithium metal secondary battery, a sodium metal battery, or a magnesium metal battery, etc.

[0058] In some embodiments, a battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and an isolation element. During the charging and discharging process of the battery cell, active ions (e.g., lithium ions) reciprocate between the positive and negative electrodes, being inserted and removed. The isolation element is placed between the positive and negative electrodes and serves to prevent short circuits between them while allowing active ions to pass through.

[0059] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material placed on at least one surface of the positive electrode current collector.

[0060] For example, the positive electrode current collector has two opposing surfaces in the thickness direction, and the positive electrode active material is provided on one or both of the two opposing surfaces of the positive electrode current collector.

[0061] As an example, a positive electrode current collector can be made of metal foil or a composite current collector. For example, as the metal foil, silver-plated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium can be used. The composite current collector may include a polymer substrate layer and a metal layer. The composite current collector can be formed by forming a metal material (such as aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy) on a polymer material substrate (for example, a substrate such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, or polyethylene).

[0062] As an example, the positive electrode active material may include at least one of lithium-containing phosphates, lithium transition metal oxides, and modified compounds thereof. In some embodiments, other conventional materials usable as positive electrode active materials for batteries may be used. These positive electrode active materials may be used individually or in combination of two or more. Examples of lithium-containing phosphates include, but are not limited to, at least one of lithium iron phosphate (e.g., LiFePO4, also known as LFP), composite materials of lithium iron phosphate and carbon, lithium manganese phosphate (e.g., LiMnPO4), composite materials of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and composite materials of lithium iron manganese phosphate and carbon.

[0063] As an example, the positive electrode active material may include at least one of sodium transition metal oxides, polyanionic compounds, and Prussian blue compounds.

[0064] In some embodiments, the sodium transition metal oxide may be a doped and modified sodium transition metal oxide, 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.

[0065] In some embodiments, a foamed metal may be used as the positive electrode. The foamed metal may be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. When a foamed metal is used as the positive electrode, a positive electrode active material may or may not be provided on the surface of the foamed metal. As an example, a lithium source material, potassium metal, or sodium metal may be filled and / or deposited within the foamed metal, and the lithium source material is lithium metal and / or a lithium-rich material.

[0066] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0067] As an example, the negative electrode current collector can be a metal foil, foamed metal, or a composite current collector. For example, as the metal foil, silver-plated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium can be used. The composite current collector may include a polymer substrate layer and a metal layer. The foamed metal may be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon. The composite current collector can be formed by forming a metal material (such as copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy) on a polymer material substrate (for example, a substrate such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, or polyethylene).

[0068] In some embodiments, the battery cell in the embodiment of the present application may be a negative electrode-free sodium secondary battery.

[0069] A negative electrode-free sodium secondary battery refers to a battery cell in which a negative electrode active material layer is not actively provided on the negative electrode side during the manufacturing process. For example, in the manufacturing process of the battery cell, a sodium metal or carbonaceous active material layer is not provided on the negative electrode by processes such as coating or deposition to form a negative electrode active material layer. During the initial charge, sodium ions gain electrons on the anode side and are deposited on the surface of the current collector to form a sodium metallic phase. During discharge, the metallic sodium is converted back into sodium ions and returns to the positive electrode, enabling cycle charging and discharging. Compared to other sodium secondary batteries, a negative electrode-free sodium secondary battery cell can achieve a higher energy density because it lacks a negative electrode active material layer.

[0070] In some embodiments, to improve the performance of the battery cell, several functional coating layers may be provided on the negative electrode side of a negative electrode-free sodium secondary battery, such as carbonaceous materials, metal oxides, or alloys, thereby improving the conductivity of the negative electrode current collector and improving the uniformity of the deposited sodium metal.

[0071] In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0072] In some embodiments, the electrode assembly further includes an isolation element placed between the positive and negative electrodes.

[0073] In some embodiments, the isolation element is a separator. The embodiments of this application are not particularly limited to the type of separator, and any known porous separator having good chemical and mechanical stability may be selected.

[0074] As an example, the main material of the separator can be selected from at least one of the following: glass fiber, nonwoven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic.

[0075] In some embodiments, the isolation element is a solid electrolyte. The solid electrolyte is placed between the positive and negative electrodes and simultaneously serves to transfer ions and isolate the positive and negative electrodes.

[0076] In some embodiments, the battery cell further includes an electrolyte, which plays a role in conducting ions between the positive and negative electrodes. The embodiments of this application do not particularly limit the type of electrolyte, which can be selected as needed. The electrolyte may be liquid, gel-like, or solid.

[0077] In some embodiments, the electrode assembly may have a wound structure. The positive electrode sheet and the negative electrode sheet are wound together to form a wound structure.

[0078] In some embodiments, the electrode assembly may have a laminated structure. For example, multiple positive electrode sheets and multiple negative electrode sheets may be installed, and the multiple positive electrode sheets and multiple negative electrode sheets may be installed in an alternating laminated arrangement.

[0079] For example, multiple positive electrode sheets may be installed, and the negative electrode sheets may be folded to form multiple stacked folded sections, with the positive electrode sheets sandwiched between adjacent folded sections.

[0080] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form multiple stacked folded sections.

[0081] For example, multiple isolation elements may be installed, each placed between any adjacent positive or negative electrode sheets.

[0082] For example, the isolation elements may be installed in a continuous manner, and may be installed between any adjacent positive or negative electrode sheets by folding or rolling them up.

[0083] In some embodiments, the shape of the electrode assembly may be cylindrical, flattened, or polygonal prism-shaped, etc.

[0084] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn out of the electrode assembly. The tabs include a positive electrode tab and a negative electrode tab.

[0085] In some embodiments, the battery cell may include an outer case. The outer case is used to enclose components such as the electrode assembly and electrolyte. The outer case may be a steel case, an aluminum case, a plastic case (e.g., polypropylene), a composite metal case (e.g., a copper-aluminum composite case), or an aluminum-plastic film, etc.

[0086] For example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft pack battery cell, or a battery cell of other shape. Prismatic battery cells include prismatic case battery cells, blade-shaped battery cells, and polygonal prismatic batteries, and polygonal prismatic batteries include hexagonal prismatic batteries, etc.

[0087] To meet different power demands, the battery of the embodiment of the present application may include a plurality of battery cells, which may be connected in series, in parallel, or in series-parallel, with series-parallel connection referring to a mixture of series and parallel connections. Preferably, a plurality of battery cells may first be connected in series, in parallel, or in series-parallel to form a battery module, and a plurality of battery modules may further be connected in series, in parallel, or in series-parallel to form a battery. That is, a plurality of battery cells may directly form a battery, or they may first form a battery module, and then the battery module may further form a battery. The battery is further installed in a power consumption device and supplies electrical energy to the power consumption device.

[0088] In some embodiments, the battery in the embodiments of the present invention may be a battery module, and if there are multiple battery cells, the multiple battery cells are arranged and fixed to form a single battery module.

[0089] In some embodiments, the battery in the embodiments of the present application may be a battery pack, which includes a housing and battery cells, and the battery cells or battery module are housed within the housing.

[0090] In some embodiments, the housing in the embodiments of the present application may be part of the vehicle's chassis structure. For example, part of the housing may be at least part of the vehicle's base plate, or part of the housing may be at least part of the vehicle's cross members and side members.

[0091] As environmental pollution worsens, the new energy industry is attracting increasing attention. Battery technology is a crucial element in the development of this new energy industry. In the development of battery technology, in addition to improving the electrical characteristics of batteries, safety issues cannot be ignored. If the safety of a battery cannot be guaranteed, it cannot be used, and its performance will be reduced. Currently, during the process of thermal runaway in battery cells, high-temperature gases and particulate matter released from the battery cell's depressurization mechanism collide with and are reflected by structures such as the inner wall of the housing or the cover plate. These reflected emissions can thermally affect the depressurization mechanisms of other battery cells, potentially causing further thermal runaway in those cells, and simultaneously affecting the operational performance of the depressurization mechanisms. Therefore, how to improve the performance of batteries is an urgent technical challenge that needs to be addressed in this field.

[0092] In view of this, an embodiment of the present application provides a battery comprising a battery cell, a support member and a first protective member, wherein a depressurization mechanism is provided in the first wall of the battery cell, the support member is used to support the battery cell, the support member comprises a first support member and a second support member connected to each other, the first support member and the second support member are located on the same side of the battery cell, the first support member is located between the first wall and the second support member and is adhered to the first wall, the first support member is provided with a first through-hole corresponding to the depressurization mechanism, the second support member is provided with a second through-hole corresponding to the depressurization mechanism, the first protective member is used to seal the second through-hole, the first protective member is destroyed when the depressurization mechanism is activated and is used to allow discharge from the battery cell to pass through the second support member. In this way, when the battery cell experiences thermal runaway, the first protective member effectively reduces the risk that discharge from the side of the first protective member away from the pressure reduction mechanism will pass through the second through-hole and flow into the pressure reduction mechanism. This suppresses the thermal impact on the pressure reduction mechanism, minimizes the impact on the operating performance of the pressure reduction mechanism, and improves the battery's performance.

[0093] Power-consuming devices may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and power tools. Vehicles may be gasoline-powered cars, natural gas cars, or new energy cars, and new energy cars may be pure electric cars, hybrid cars, or range-extender cars, etc. Spacecraft include aircraft, rockets, space shuttles, and spaceships, etc. Electric toys include stationary or mobile electric toys such as game consoles, electric car toys, electric boat toys, and electric aircraft toys, and power tools include metal cutting power tools such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, electric impact drivers, concrete vibrators, and electric planers, as well as polishing power tools, assembly power tools, and railway power tools.

[0094] Furthermore, the technical solutions described in the embodiments of this application can be applied not only to the power consumption devices described above, but also to all devices that use batteries. However, for the sake of simplification, the following embodiments will be described in detail using the example that the power consumption device is a vehicle.

[0095] For example, Figure 1 shows a schematic diagram of the structure of a vehicle 1 according to an embodiment of the present invention. The vehicle 1 may be a gasoline vehicle, a natural gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range extender vehicle, etc. A motor 40, a controller 30, and a battery 10 can be installed inside the vehicle 1, and the controller 30 is used to control the battery 10 and supply power to the motor 40. For example, the battery 10 can be installed at the bottom of the vehicle 1, or at the front or rear of the vehicle. The battery 10 is used to supply power to the vehicle 1. For example, the battery 10 can be used as the operating power source for the vehicle 1, in the circuit system of the vehicle 1, to meet the operating power requirements for starting the vehicle 1, navigation, and driving. In another embodiment of the present invention, the battery 10 can provide driving power to the vehicle 1 not only as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas.

[0096] To meet the diverse power consumption needs, the battery 10 in the embodiment of this application may be a battery cell module or a battery pack. The battery 10 may include at least one battery cell module, and the battery cell module may include multiple battery cells, which are electrically connected in series, parallel, or series-parallel to form the battery 10, where series-parallel connection refers to a mixture of series and parallel connections. The battery 10 is also called a battery pack. For example, multiple battery cells may first constitute a battery module by series, parallel, or series-parallel connection, and then the multiple battery modules may be further connected in series, parallel, or series-parallel to form the battery 10. That is, multiple battery cells may directly constitute the battery 10, or they may first constitute a battery module, and then the battery modules may further constitute the battery 10.

[0097] In some embodiments, the battery 10 may include a plurality of battery cells. For example, Figure 2 shows a schematic diagram of the structure of a battery 10 according to one embodiment of the present application, and the battery 10 may include a plurality of battery cells 20. The battery 10 may further include a housing 11, the inside of which has a hollow structure, and the plurality of battery cells 20 are housed inside the housing 11. For example, the plurality of battery cells 20 may be connected in parallel, in series, or in series-parallel and then arranged inside the housing 11.

[0098] In some embodiments, the battery 10 may include other structures, which will not be described individually here. For example, the battery 10 may further include a bus member, which is used to realize electrical connections between a plurality of battery cells 20, such as parallel, series, or series-parallel connections. Specifically, the bus member can realize electrical connections between the battery cells 20 by connecting the electrode terminals of the battery cells 20. Furthermore, the bus member may be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of the plurality of battery cells 20 may further be drawn through the housing via a conductive mechanism. Optionally, the conductive mechanism may belong to the bus member.

[0099] In the embodiments of this invention, the number of battery cells 20 can be set to any number depending on the different power demands. Multiple battery cells 20 may be connected in series, parallel, or series-parallel configuration to achieve a larger capacity or output. Since each battery 10 may contain a large number of battery cells 20, the battery cells 20 may be grouped together for easier installation, and each group of battery cells 20 constitutes a battery module. The number of battery cells 20 included in a battery module is not limited and can be set as needed. The battery 10 may contain multiple battery modules, and these battery modules can be connected in series, parallel, or series-parallel configurations.

[0100] Figure 3 shows a schematic diagram of the structure of a battery cell 20 according to one embodiment of the present invention, which includes one or more electrode assemblies 22, a housing 211, and a cover plate 212. The housing 211 and the cover plate 212 form an outer case 21 or battery case. The walls of the housing 211 and the walls of the cover plate 212 are both called walls of the battery cell 20, and in the case of a rectangular parallelepiped battery cell 20, the walls of the housing 211 include a bottom wall and four side walls. The shape of the housing 211 is determined according to the shape after one or more electrode assemblies 22 are combined, for example, the housing 211 may be a hollow rectangular parallelepiped, cube, or cylinder, and one face of the housing 211 has an opening, and one or more electrode assemblies 22 can be placed inside the housing 211. For example, if the housing 211 is a hollow rectangular parallelepiped or cube, one plane of the housing 211 is an opening, and this plane has no walls and connects the inside and outside of the housing 211. The housing 211 may be a hollow cylindrical body, in which case the end face of the housing 211 is an open surface, and this end face has no wall, allowing communication between the inside and outside of the housing 211. The cover plate 212 covers the opening and is connected to the housing 211, forming a sealed cavity in which the electrode assembly 22 is placed. The housing 211 is filled with an electrolyte, such as an electrolyte solution.

[0101] The battery cell 20 may further include two electrode terminals 214 that can be mounted on a cover plate 212. The cover plate 212 is generally flat, and the two electrode terminals 214 are fixed to the flat surface of the cover plate 212, with the two electrode terminals 214 being the positive terminal 214a and the negative terminal 214b, respectively. A connecting member, also called a current collector, is installed corresponding to each electrode terminal 214, and is located between the cover plate 212 and the electrode assembly 22, and is used to electrically connect the electrode assembly 22 and the electrode terminals 214.

[0102] As shown in Figure 3, each electrode assembly 22 has a first tab 221a and a second tab 222a. The polarities of the first tab 221a and the second tab 222a are opposite. For example, if the first tab 221a is the positive electrode tab, then the second tab 222a is the negative electrode tab.

[0103] In the battery cell 20, one or more electrode assemblies 22 can be installed depending on the requirements of actual use, and as shown in Figure 3, two independent electrode assemblies 22 are installed within the battery cell 20.

[0104] A pressure reduction mechanism 213 may also be installed in the battery cell 20. The pressure reduction mechanism 213 is used to release the internal pressure or temperature of the battery cell 20 when the internal pressure or temperature reaches a threshold.

[0105] The depressurization mechanism 213 may be a variety of possible depressurization structures. For example, the depressurization mechanism 213 may be a temperature-sensitive depressurization mechanism, which is configured to melt when the internal temperature of the battery cell 20 in which the depressurization mechanism 213 is installed reaches a threshold, and / or the depressurization mechanism 213 may be a pressure-sensitive depressurization mechanism, which is configured to rupture when the internal pressure of the battery cell 20 in which the depressurization mechanism 213 is installed reaches a threshold.

[0106] Figure 4 shows a schematic diagram of the structure of a battery 10 according to another embodiment of the present application. Figure 5 shows a schematic cross-sectional view of a battery 10 according to another embodiment of the present application. Figure 6 shows a schematic partial cross-sectional view of a battery 10 according to another embodiment of the present application. Exemplarily, Figure 5 may be a schematic cross-sectional view of the corresponding part of the battery 10 in Figure 4, and Figure 6 may be an enlarged schematic cross-sectional view of the corresponding part of the battery 10 in Figure 4 or Figure 5.

[0107] In some embodiments, as shown in Figures 4 to 6, the battery 10 includes a battery cell 20, a support member 12 and a first protective member 13, wherein a pressure reducing mechanism 213 is provided in the first wall 215 of the battery cell 20, the support member 12 is used to support the battery cell 20, the support member 12 includes a first support member 121 and a second support member 122 connected to each other, the first support member 121 and the second support member 122 are located on the same side of the battery cell 20, and the first support member 121 is in the first wall 215 The first protective member 13 is located between the first support member 121 and the second support member 122 and is adhered to the first wall 215. The first support member 121 is provided with a first through-hole 1211 corresponding to the depressurization mechanism 213, and the second support member 122 is provided with a second through-hole 1221 corresponding to the depressurization mechanism 213. The first protective member 13 is used to seal the second through-hole 1221 and is destroyed when the depressurization mechanism 213 is activated, allowing waste from the battery cell 20 to pass through the second support member 122.

[0108] In the embodiments of the present application, the shape of the first through-hole 1211 located in the first support member 121 in a direction perpendicular to the thickness direction of the first support member 121 can be set according to the actual requirements. For example, the shape of the first through-hole 1211 may be set according to the shape of the pressure reduction mechanism 213 of the battery cell 20. Exemplarily, the shape of the first through-hole 1211 includes, but is not limited to, a circular, elliptical, rectangular, or regular polygon shape. In contrast, in the embodiments of the present application, the shape of the second through-hole 1221 located in the second support member 122 in a direction perpendicular to the thickness direction of the second support member 122C can be set according to the actual requirements. For example, the shape of the second through-hole 1221 may be set according to the shape of the pressure reduction mechanism 213 of the battery cell 20. Exemplarily, the shape of the second through-hole 1221 includes, but is not limited to, a circular, elliptical, rectangular, or regular polygon shape.

[0109] Furthermore, the first wall 215 in the embodiment of the present application may be any one of the walls of the battery cell 20. For example, the first wall 215 may be the wall with the smallest area of ​​the battery cell 20, or the wall with the largest area of ​​the battery cell 20, or the wall on which the electrode terminals 214 of the battery cell 20 are provided, or the first wall 215 may be a wall adjacent to the wall on which the electrode terminals 214 of the battery cell 20 are provided, or the first wall may be a wall facing the wall on which the electrode terminals 214 of the battery cell 20 are provided, but is not limited to these.

[0110] Furthermore, in the embodiment of the present invention, as shown in Figures 4 and 5, a housing pressure reducing valve 111 is provided on the side wall of the housing 11 of the battery 10, on a surface away from the inside of the housing 11. The housing pressure reducing valve 111 is used to discharge high-pressure, high-temperature gas generated during the depressurization process when the depressurization mechanism 213 of the battery cell 20 is activated, thereby reducing the thermal impact on the battery cell 20 and improving the operating performance of the battery 10.

[0111] Furthermore, in the embodiments of the present application, the first support member 121 and the first wall 215 of the battery cell 20 are connected by adhesive, and, as exemplary, as shown in Figures 5 and 6, the first support member 121 and the first wall 215 of the battery cell 20 may be connected by adhesive 112.

[0112] Furthermore, in the embodiments of the present application, the pressure reduction mechanism 213 is used to release internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. In the embodiments of the present application, the first through-hole 1211 is used for discharge from the battery cell 20 to pass through the first support member 121 when the pressure reduction mechanism 213 is activated, and in the embodiments of the present application, the second through-hole 1221 is used for discharge from the battery cell 20 to pass through the second support member 122 when the pressure reduction mechanism 213 is activated.

[0113] In the embodiments of this application, the average distance between the first support member 121 and the second support member 122 can be set according to the actual requirements so as to satisfy the structural strength of the battery 10. It should also be understood that in the embodiments of this application, the battery 10 further includes a plurality of other support members, for example, a third support member, which may be provided on the side of the second support member 122 away from the pressure reduction mechanism 213 of the battery 10, or the third support member may be provided between the first support member 121 and the second support member 122.

[0114] In the embodiment of the present application, the battery 10 is provided with a support member 12 and a first protective member 13, the support member 12 includes a first support member 121 and a second support member 122 connected to each other, the first support member 121 and the second support member 122 are located on the same side of the battery cell 20, the first support member 121 is located between the first wall 215 and the second support member 122 and is adhered to the first wall 215, the second support member 122 is provided with a second through hole 1221 corresponding to the pressure reduction mechanism 213, and the first protective member 13 is provided to seal the second through hole 1221 The first protective member 13 is used to break when the depressurization mechanism 213 is activated, allowing waste from the battery cell 20 to pass through the second support member 122. By providing the first protective member 13, when the battery cell 20 experiences thermal runaway, the risk of waste from the side of the first protective member 13 away from the depressurization mechanism 213 passing through the second through-hole 1221 and flowing into the depressurization mechanism 213 is effectively reduced, thereby suppressing the thermal impact on the battery cell 20, minimizing the impact on the operating performance of the depressurization mechanism 213, and improving the usability of the battery 10.

[0115] In some embodiments, as shown in Figures 5 and 6, the first protective member 13 is provided on the surface of the second support member 122 away from the first wall 215. In this way, in the embodiments of the present application, when the battery cell 20 experiences thermal runaway, the first protective member 13 is destroyed when the depressurization mechanism 213 of the battery cell 20 is activated. This effectively reduces the risk that discharge from the side of the first protective member 13 away from the depressurization mechanism 213 will pass through the second through-hole 1221 and flow into the depressurization mechanism 213, thereby minimizing the impact on the operating performance of the depressurization mechanism 213 and improving the usability of the battery 10. Furthermore, the installation method is simple and easy to process and manufacture.

[0116] Figure 7 shows a schematic diagram of the structure of the first protective member 13 according to one embodiment of the present invention. Figure 8 shows a schematic diagram of the structure of the first protective member 13 according to another embodiment of the present invention.

[0117] In some embodiments, as shown in Figures 7 and 8, the first protective member 13 is provided with a first vulnerable region 131, which is configured to be destroyed by the discharge when the decompression mechanism 213 is activated, allowing the discharge to pass through the first vulnerable region 131.

[0118] In the embodiment of the present invention, at least a portion of at least one surface of the first protective member 13 perpendicular to the thickness direction of the first protective member 13 can be set as the first vulnerable region 131, thereby being destroyed by the discharge when the decompression mechanism 213 is activated, and allowing the discharge to pass through the first vulnerable region 131.

[0119] Furthermore, in the embodiments of the present application, the shape of the first vulnerable region 131 in a direction perpendicular to the thickness direction of the first protective member 13 can be set according to actual requirements, for example, the shape of the first vulnerable region 131 can be set according to the shape of the depressurization mechanism 213 of the battery cell 20, and the shape of the first vulnerable region 131 includes, but is not limited to, a circle, an ellipse, a rectangle, or a regular polygon.

[0120] Furthermore, the number of first vulnerable areas 131 provided in the first protective member 13 can be set according to the actual requirements; for example, the number of first vulnerable areas 131 may be one or more.

[0121] In the embodiment of the present invention, the first protective member 13 is provided with a first vulnerable region 131, and the first vulnerable region 131 is configured to be destroyed by discharge when the depressurization mechanism 213 is activated. That is, when the internal pressure or temperature of the battery cell 20 reaches a threshold, the discharge is configured to pass through the first vulnerable region 131 immediately and quickly, thereby rapidly depressurizing the battery cell 20 and preventing the discharge from accumulating on the side of the first protective member 13 closer to the depressurization mechanism 213 of the battery 10, which would affect the operating performance of the depressurization mechanism 213, thereby improving the usability of the battery 10.

[0122] In some embodiments, the first vulnerable region 131 satisfies at least one of the following conditions: the melting point of the material of the first vulnerable region 131 is lower than the melting point of the material of the rest of the first protective member 13; the thickness of the first vulnerable region 131 is thinner than the thickness of the rest of the first protective member 13; and shallow grooves are provided on the surface of the first vulnerable region 131 perpendicular to the thickness direction of the first protective member 13.

[0123] In the embodiment of the present invention, the melting point of the material in the first vulnerable region 131 can be set to a preset threshold or lower, so that when the depressurization mechanism 213 is activated, the first vulnerable region 131 is more easily melted by the discharged material through the depressurization mechanism 213 than the remaining portion of the first protective member 13. Furthermore, the thickness of the first vulnerable region 131 can be set to less than the thickness of the remaining portion of the first protective member 13, so that the first vulnerable region 131 is thinner than the remaining portion of the first protective member 13, and when the depressurization mechanism 213 is activated, the first vulnerable region 131 is more easily destroyed by the discharged material through the depressurization mechanism 213 than the remaining portion of the first protective member 13.

[0124] In the embodiments of this application, the shape of the shallow grooves provided on the surface of the first protective member 13 perpendicular to the thickness direction of the first vulnerable region 131 can be set according to actual requirements. For example, the shallow grooves include, but are not limited to, straight shallow grooves, cross-shaped shallow grooves, R-shaped shallow grooves, and I-shaped shallow grooves.

[0125] In the embodiment of the present application, the first vulnerable region 131 is configured such that at least one of the following conditions is met: the melting point of the material at the location of the first vulnerable region 131 is lower than the melting point of the material of the remaining portion of the first protective member 13; the thickness of the first vulnerable region 131 is thinner than the thickness of the remaining portion of the first protective member 13; and shallow grooves are provided on the surface of the first vulnerable region 131 perpendicular to the thickness direction of the first protective member 13. As a result, the first vulnerable region 131 is more easily destroyed by the discharge of the battery cell 20 than the remaining portion of the first protective member 13. When the internal pressure or temperature of the battery cell 20 reaches a threshold, the discharge can immediately and quickly pass through the first vulnerable region 131, enabling rapid decompression of the battery cell 20. This prevents the discharge from accumulating on the side of the first protective member 13 closer to the decompression mechanism 213 of the battery cell 20, thereby reducing the operating performance of the decompression mechanism 213 and improving the usability of the battery 10.

[0126] In some embodiments, as shown in Figures 7 and 8, there are multiple depressurization mechanisms 213, and the first protective member 13 is provided with multiple first vulnerable regions 131, with each of the multiple first vulnerable regions 131 corresponding one-to-one with each of the multiple depressurization mechanisms 213.

[0127] In the embodiment of the present application, the first protective member 13 may be an integral structure, or the first protective member may include a plurality of sub-protective members. For example, the first protective member 13 may include a plurality of sub-protective members, and each sub-protective member may have at least one surface perpendicular to the first protective member 13 on which one first vulnerable region 131 is provided, and each first vulnerable region 131 corresponds one-to-one with each depressurization mechanism 213.

[0128] In the embodiment of the present invention, the first protective member 13 is provided with a plurality of first vulnerable regions 131, and each of the plurality of first vulnerable regions 131 corresponds one-to-one with each of the plurality of depressurization mechanisms 213. This allows the discharge generated by the battery cell 20 when it experiences thermal runaway, that is, when the internal pressure or temperature of the battery cell 20 reaches a threshold, to immediately and quickly pass through the corresponding first vulnerable region 131, thereby achieving rapid depressurization of the battery cell and suppressing the effect of the discharge on the operating performance of the depressurization mechanisms 213 of other battery cells 20, thereby improving the usability of the battery 10.

[0129] In some embodiments, in a plane perpendicular to the thickness direction of the first protective member 13, the projection of the first protective member 13 covers the projection of the depressurization mechanism 213.

[0130] In the embodiments of the present application, the projection of the first protective member 13 or the pressure reducing mechanism 213 onto a plane perpendicular to the thickness direction of the first protective member 13 may be an orthographic projection in the thickness direction, or the projection of the first protective member 13 or the pressure reducing mechanism 213 onto a plane perpendicular to the thickness direction of the first protective member 13 may be a projection in any other direction.

[0131] In the embodiment of the present invention, by setting the projection of the first protective member 13 to cover the projection of the decompression mechanism 213 in a plane perpendicular to the thickness direction of the first protective member 13, the first protective member 13 can further reduce the risk that discharge from the side of the first protective member 13 away from the decompression mechanism 213 will pass through the first protective member 13 and flow into the decompression mechanism 213, thereby reducing the impact on the operating performance of the decompression mechanism 213 and further improving the usage performance of the battery 10.

[0132] In some embodiments, the material of the first protective member 13 includes at least one of polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin. In this way, in the embodiments of the present application, by setting the material of the first protective member 13 to include at least one of polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin, the insulating performance of the first protective member 13 can be effectively improved, the risk of short circuits occurring inside the battery 10 can be reduced, and the operating performance of the battery 10 can be further improved.

[0133] Figure 9 shows a schematic cross-sectional view of a battery 10 according to another embodiment of the present application. Figure 10 shows a schematic partial cross-sectional view of a battery 10 according to another embodiment of the present application. Exemplarily, Figure 10 may be an enlarged schematic cross-sectional view of the portion corresponding to the battery 10 in Figure 9.

[0134] In some embodiments, as shown in Figures 9 and 10, the battery 10 further includes a second protective member 14, which is used to seal the first through-hole 1211 and is destroyed when the depressurization mechanism 213 is activated, allowing waste from the battery cell 20 to pass through the first support member 121. In this manner, in the embodiment of the present invention, the battery 10 is provided with a second protective member 14, which is used to seal the first through-hole 1211, and which is destroyed when the depressurization mechanism 213 is activated, allowing the discharge from the battery cell 20 to pass through the first support member 121. By providing the second protective member 14 when the battery cell 20 experiences thermal runaway, the risk of discharge from the side of the second protective member 14 away from the depressurization mechanism 213 passing through the first through-hole 1211 and flowing into the depressurization mechanism 213 is reduced, the thermal impact on the battery cell 20 is reduced, the impact on the operating performance of the depressurization mechanism 213 is reduced, and the usability of the battery 10 can be improved.

[0135] In some embodiments, as shown in Figures 9 and 10, the second protective member 14 is provided on a surface of the first support member 121 that is away from the first wall 215. In this way, in the embodiments of the present application, when the battery cell 20 experiences thermal runaway, the second protective member 14 is destroyed when the depressurization mechanism 213 of the battery cell 20 is activated. This effectively reduces the risk that discharge from the side of the second protective member 14 away from the depressurization mechanism 213 will pass through the first through-hole 1211 and flow into the depressurization mechanism 213, thereby minimizing the impact on the operating performance of the depressurization mechanism 213 and improving the usability of the battery 10. Furthermore, the installation method is simple and easy to process and manufacture.

[0136] In some embodiments, the second protective member 14 is provided with a second vulnerable region 141, which is configured to be destroyed by the discharge when the decompression mechanism 213 is activated, allowing the discharge to pass through the second protective member 14.

[0137] In the embodiment of the present application, at least a portion of at least one surface of the second protective member 14 perpendicular to the thickness direction of the second protective member 14 can be set as the second vulnerable region 141, thereby being destroyed by the discharge when the decompression mechanism 213 is activated, and allowing the discharge to pass through the second vulnerable region 141.

[0138] Furthermore, in the embodiments of the present application, the shape of the second vulnerable region 141 in a direction perpendicular to the thickness direction of the second protective member 14 can be set according to actual requirements, for example, the shape of the second vulnerable region 141 can be set according to the shape of the depressurization mechanism 213 of the battery cell 20, and the shape of the second vulnerable region 141 includes, but is not limited to, a circular, elliptical, rectangular, or regular polygon shape.

[0139] Furthermore, the number of second vulnerable areas 141 provided in the second protective member 14 can be set according to the actual requirements; for example, the number of second vulnerable areas 141 may be one or more.

[0140] In the embodiment of the present invention, the second protective member 14 is provided with a second vulnerable region 141, and the second vulnerable region 141 is configured to be destroyed by discharge when the depressurization mechanism 213 is activated. That is, when the internal pressure or temperature of the battery cell 20 reaches a threshold, the discharge is configured to pass through the second vulnerable region 141 immediately and quickly, thereby achieving rapid depressurization of the battery cell 20, preventing the discharge from accumulating on the side of the second protective member 14 closer to the depressurization mechanism 213 of the battery 10 and affecting the operating performance of the depressurization mechanism 213, thereby improving the usability of the battery 10.

[0141] In some embodiments, the second vulnerable region satisfies at least one of the following conditions: the melting point of the material of the second vulnerable region 141 is lower than the melting point of the material of the rest of the second protective member 14; the thickness of the second vulnerable region 141 is thinner than the thickness of the rest of the second protective member 14; and shallow grooves are provided on the surface of the second vulnerable region 141 perpendicular to the thickness direction of the second protective member 14.

[0142] In the embodiment of the present invention, the melting point of the material in the second weak region 141 can be set to a preset threshold or lower, so that when the depressurization mechanism 213 is activated, the second weak region 141 is more easily melted by the discharged material through the depressurization mechanism 213 than the remaining portion of the second protective member 14. In addition, the thickness of the second weak region 141 can be set to less than the thickness of the remaining portion of the second protective member 14, so that the second weak region 141 is thinner than the remaining portion of the second protective member 14, and when the depressurization mechanism 213 is activated, the second weak region 141 is more easily destroyed by the discharged material through the depressurization mechanism 213 than the remaining portion of the second protective member 14.

[0143] Furthermore, in the embodiments of the present application, the shape of the shallow grooves provided on the surface of the second protective member 14 perpendicular to the thickness direction of the second vulnerable region 141 can be set according to actual requirements, and exemplary the shallow grooves include, but are not limited to, straight shallow grooves, cross-shaped shallow grooves, R-shaped shallow grooves, and I-shaped shallow grooves.

[0144] In the embodiment of the present application, the second vulnerable region 141 is configured such that at least one of the following conditions is met: the melting point of the material at the location of the second vulnerable region 141 is lower than the melting point of the material of the remaining portion of the second protective member 14; the thickness of the second vulnerable region 141 is thinner than the thickness of the remaining portion of the second protective member 14; and shallow grooves are provided on the surface of the second vulnerable region 141 perpendicular to the thickness direction of the second protective member 14. As a result, the second vulnerable region 141 is more easily destroyed by the discharge of the battery cell 20 than the remaining portion of the second protective member 14. When the internal pressure or temperature of the battery cell 20 reaches a threshold, the discharge can immediately and quickly pass through the second vulnerable region 141, enabling rapid decompression of the battery cell 20. This prevents the discharge from accumulating on the side of the second protective member 14 closer to the decompression mechanism 213 of the battery cell 20, thereby reducing the operating performance of the decompression mechanism 213 and improving the usability of the battery 10.

[0145] In some embodiments, the material of the second protective member 14 includes at least one of polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin. In this way, in the embodiments of the present application, by setting the material of the second protective member 14 to include at least one of polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin, the insulating performance of the second protective member 14 can be effectively improved, the risk of short circuits occurring inside the battery 10 can be reduced, and the operating performance of the battery 10 can be further improved.

[0146] Figure 11 shows a schematic cross-sectional view of a battery 10 according to another embodiment of the present application. Figure 12 shows a schematic partial cross-sectional view of a battery 10 according to another embodiment of the present application. Exemplarily, Figure 12 may be an enlarged schematic cross-sectional view of the portion corresponding to the battery 10 in Figure 11.

[0147] In some embodiments, as shown in Figures 11 and 12, the battery 10 further includes an isolation member 15, which is connected to the first support member 121, which is attached to the first wall 215 by an adhesive 112, and the isolation member 15 is configured to prevent the adhesive 112 from being applied to the area where the depressurization mechanism 213 is located.

[0148] In the embodiments of this application, the adhesive 112 for bonding the first support member 121 to the first wall 215 includes, but is not limited to, polyurethane adhesive, acrylic adhesive, and silicone rubber adhesive.

[0149] In the embodiment of the present invention, when an isolation member 15 is provided inside the battery 10 and the isolation member 15 is connected to the first support member 121, thereby the first support member 121 is adhered to the first wall 215 by adhesive 112, the isolation member 15 is configured to prevent the adhesive 112 from being applied to the area where the pressure reducing mechanism 213 is located, thereby effectively suppressing the effect of the adhesive 112 entering the pressure reducing mechanism 213 on the operating performance of the pressure reducing mechanism 213, and further improving the usability of the battery 10.

[0150] In some embodiments, as shown in Figure 12, the isolation member 15 is provided with a groove 150 that opens toward the battery cell 20, at least a portion of the side wall 151 of the groove 150 is located within the first through hole 1211, and the outer edge 152 of the groove 150 is connected to the side wall 151 and is provided between the first support member 121 and the first wall 215.

[0151] In the embodiment of the present application, the isolation member 15 is set as a groove 150 that opens toward the battery cell 20, and at least a portion of the side wall 151 of the groove 150 is located within the first through hole 1211, and the outer edge 152 of the groove 150 is connected to the side wall 151 and provided between the first support member 121 and the first wall 215, so that the first support member 121 is adhered to the first wall 215 by adhesive 112, thereby effectively preventing the adhesive 112 from being applied between the first support member 121 and the pressure reducing mechanism 213, effectively reducing the influence of the adhesive 112 entering the pressure reducing mechanism 213 on the operating performance of the pressure reducing mechanism 213, and improving the usability of the battery 10.

[0152] In some embodiments, the bottom wall 153 of the groove 150 is configured to be destroyed by the discharge when the decompression mechanism 213 is activated, allowing the discharge to pass through the isolation member 15.

[0153] In the embodiments of this application, the shape of the bottom wall 153 of the groove 150 can be set according to the actual requirements. 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 reduction 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 circular, elliptical, rectangular, or regular polygon shape.

[0154] In the embodiment of the present invention, the bottom wall 153 of the groove 150 is destroyed by the waste discharged from the battery cell 20 when the depressurization mechanism 213 is activated, and the waste is configured to pass through the isolation member 15. As a result, the waste is immediately discharged, and the waste does not accumulate in the groove 150, which has an effect on the operating performance of the depressurization mechanism 213, reduces the thermal effect on the battery cell 20, and improves the operating performance of the battery 10.

[0155] In some embodiments, as shown in Figure 12, a third vulnerable region 154 is provided in the bottom wall 153 of the groove 150, and the third vulnerable region 154 is configured to be destroyed by the discharge when the decompression mechanism 213 is activated, allowing the discharge to pass through the isolation member 15.

[0156] In this embodiment, at least a portion of at least one surface of the bottom wall 153 of the groove 150 perpendicular to the thickness direction of the bottom wall 153 can be set as the third vulnerable region 154, which is destroyed by the discharge when the depressurization mechanism 213 is activated, allowing the discharge to pass through the isolation member 15.

[0157] Furthermore, in embodiments of the present application, the shape of the third vulnerable region 154 in a direction perpendicular to the thickness direction of the bottom wall 153 can be set according to actual requirements, for example, the shape of the third vulnerable region 154 can be set according to the shape of the depressurization mechanism 213 of the battery cell 20, and the shape of the third vulnerable region 154 includes, but is not limited to, a circular, elliptical, rectangular, or regular polygon shape.

[0158] Furthermore, the number of third vulnerable areas 154 provided on the bottom wall 153 of the groove 150 can be set according to the actual requirements; for example, the number of third vulnerable areas 154 may be one or more.

[0159] In the embodiment of the present invention, a third vulnerable region 154 is provided in the bottom wall 153 of the groove 150, and the third vulnerable region 154 is configured to be destroyed by the discharge when the depressurization mechanism 213 is activated. That is, when the internal pressure or temperature of the battery cell 20 reaches a threshold, the discharge is configured to pass through the isolation member 15 immediately and quickly, thereby achieving rapid depressurization of the battery cell 20, preventing the discharge from accumulating in the groove 150 and affecting the operating performance of the depressurization mechanism 213, and thereby improving the operating performance of the battery 10.

[0160] In some embodiments, the third weak region 154 satisfies at least one of the following: the melting point of the material of the third weak region 154 is lower than the melting point of the material of the rest of the isolation member 15; the thickness of the third weak region 154 is thinner than the thickness of the rest of the isolation member 15; and shallow grooves are provided on the surface of the third weak region 154 perpendicular to the thickness direction of the isolation member 15.

[0161] In the embodiment of the present invention, the melting point of the material in the third weak region 154 can be set to a preset threshold or lower, so that when the depressurization mechanism 213 is activated, the third weak region 154 is more easily melted by the discharged material through the depressurization mechanism 213 than the remaining portion of the isolation member 15. In addition, the thickness of the third weak region 154 can be set to less than the thickness of the remaining portion of the isolation member 15, so that the third weak region 154 is thinner than the remaining portion of the isolation member 15, and when the depressurization mechanism 213 is activated, the third weak region 154 is more easily destroyed by the discharged material through the depressurization mechanism 213 than the remaining portion of the isolation member 15.

[0162] Furthermore, in the embodiments of the present application, the shape of the shallow grooves provided on the surface of the isolation member 15 perpendicular to the thickness direction of the third vulnerable region 154 can be set according to actual requirements, and exemplary the shallow grooves include, but are not limited to, straight shallow grooves, cross-shaped shallow grooves, R-shaped shallow grooves, and I-shaped shallow grooves.

[0163] In the embodiment of the present application, the third vulnerable region 154 is configured such that at least one of the following conditions is met: the melting point of the material of the third vulnerable region 154 is lower than the melting point of the material of the remaining portion of the isolation member 15; the thickness of the third vulnerable region 154 is thinner than the thickness of the remaining portion of the isolation member 15; and shallow grooves are provided on the surface of the third vulnerable region 154 perpendicular to the thickness direction of the isolation member 15. As a result, the third vulnerable region 154 is more easily destroyed by the discharge of the battery cell 20 than the remaining portion of the isolation member 15. When the internal pressure or temperature of the battery cell 20 reaches a threshold, the discharge can immediately and quickly pass through the third vulnerable region 154, enabling rapid decompression of the battery cell 20. This prevents the discharge from accumulating on the side of the isolation member 15 closer to the decompression mechanism 213 of the battery cell 20, thereby reducing the operating performance of the decompression mechanism 213 and improving the usability of the battery 10.

[0164] In some embodiments, as shown in Figures 11 and 12, the battery 10 further includes a third protective member 16 connected to the surface of the isolation member 15 away from the depressurization mechanism 213 to protect the isolation member 15.

[0165] In the embodiments of this application, the third protective member 16 and the isolation member 15 may be connected by adhesive, and, as an example, the third protective member 16 and the isolation member 15 may be connected by an adhesive 112.

[0166] Furthermore, in the embodiments of the present application, the shape of the third protective member 16 along the direction perpendicular to the thickness direction of the bottom wall 153 of the groove 150 can be set according to actual requirements. For example, the shape of the third protective member 16 along the direction perpendicular to the thickness direction of 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 member 16 along the direction perpendicular to the thickness direction of the bottom wall 153 of the groove 150 includes, but is not limited to, circular, elliptical, rectangular, and regular polygonal shapes.

[0167] Furthermore, in the embodiments of the present application, the material of the third protective member 16 includes at least one of polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin. In this way, by setting the material of the third protective member 16 to include at least one of polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin in the embodiments of the present application, the insulation performance, heat resistance and chemical stability of the third protective member 16 can be improved, effectively reducing the possibility of damage to the surface of the isolation member 15 away from the depressurization mechanism 213 when subjected to vibration, shock, high temperature, etc., and improving the usability of the battery 10. In the embodiment of the present invention, a third protective member 16 is provided inside the battery 10, and the third protective member 16 is connected to a surface of the isolation member 15 away from the pressure reduction mechanism 213. This allows the third protective member 16 to protect the isolation member 15, reducing the possibility of damage to the surface of the isolation member 15 away from the pressure reduction mechanism 213 when subjected to vibration, shock, high temperature, etc., thereby improving the performance of the battery 10.

[0168] In some embodiments, the isolation member 15 and the third protective member 16 are configured to be destroyed by the discharge from the battery cell 20 when the depressurization mechanism 213 is activated, allowing the discharge to pass through the isolation member 15 and the third protective member 16. In this way, in the embodiments of the present application, the isolation member 15 and the third protective member 16 are configured to be destroyed by the discharge from the battery cell 20 when the depressurization mechanism 213 is activated, allowing the discharge to pass through the isolation member 15 and the third protective member 16. As a result, during the operation of the depressurization mechanism 213, the discharge from the depressurization mechanism 213 passes smoothly through the isolation member 15 and the third protective member 16 and is discharged from the electrical cavity of the battery 10, reducing the thermal impact on the battery cell 20 and improving the operating performance of the battery 10.

[0169] In some embodiments, the melting point of the third protective member 16 is higher than that of the isolation member 15. In this way, in the embodiments of the present application, the third protective member 16 is connected to a surface of the isolation member 15 away from the decompression mechanism 213, and the melting point of the third protective member 16 is set higher than that of the isolation member 15, thereby reducing the possibility of damage to the surface of the isolation member 15 away from the decompression mechanism 213 when subjected to vibration, shock, high temperature, etc., and improving the performance of the battery 10.

[0170] Referring again to Figures 4 to 8 above, a battery 10 is provided, which includes a battery cell 20, a support member 12 and a first protective member 13, wherein a pressure reducing mechanism 213 is provided in the first wall 215 of the battery cell 20, the support member 12 is used to support the battery cell 20, the support member 12 includes a first support member 121 and a second support member 122 which are connected to each other, the first support member 121 and the second support member 122 are located on the same side of the battery cell 20, the first support member 121 is located between the first wall 215 and the second support member 122 and the first wall 215 The first support member 121 is provided with a first through-hole 1211 corresponding to the depressurization mechanism 213, the second support member 122 is provided with a second through-hole 1221 corresponding to the depressurization mechanism 213, the first protective member 13 is used to seal the second through-hole 1221, the first protective member 13 is destroyed when the depressurization mechanism 213 is activated and is used to allow waste from the battery cell 20 to pass through the second support member 122, and the first protective member 13 is provided on the surface of the second support member 122 away from the first wall 215. The first protective member 13 is provided with a first vulnerable region 131, which is configured to be destroyed by the discharge when the decompression mechanism 213 is activated, allowing the discharge to pass through the first vulnerable region 131, and the first protective member 13 is provided with a plurality of first vulnerable regions 131, with each of the plurality of first vulnerable regions 131 corresponding one-to-one with each of the plurality of decompression mechanisms 213.

[0171] Embodiments of the present invention further provide a power consumption device including a battery 10 in any of the above embodiments, wherein the battery 10 is used to supply electrical energy to the power consumption device. Specifically, the power consumption device may be the vehicle 1 shown in Figure 1, or any power consumption device that uses a battery 10.

[0172] Embodiments of the present application further provide an energy storage device including a battery 10 in any of the above embodiments, the battery 10 being used to store electrical energy in the energy storage device.

[0173] Although the present application has been described with reference to the above embodiments, various improvements can be made and components can be replaced with equivalents without departing from the scope of the application. In particular, each technical feature mentioned in each embodiment can be combined in any way, as long as there is no structural inconsistency. The present application is not limited to the specific embodiments disclosed herein and includes all technical solutions included in the claims. [Explanation of Symbols]

[0174] 1- Vehicle 10-battery 20-Battery Cells 30-Controller 40-Motor 11- Enclosure 21-Outer Case 22-Electrode Assembly 211-Housing 212-Cover Plate 213-Depressurization Mechanism 221a - Tab 1 222a - Tab 2 214-electrode terminal 214a-Positive terminal 214b-Negative terminal 111-Housing Pressure Reducing Valve 12-Support Member 13-First protective member 112-Adhesive 121-First support member 122-Second support member 1211 - First through hole 1221 - Second through hole 215-1st wall 131-1st vulnerable area 14-Second protective member 141-Second vulnerable area 15-Isolation Member 16-Third protective member 150-groove 151-side wall 152 - Outer edge 153 - Bottom Wall 154-Third vulnerable area

Claims

1. A battery cell (20) having a pressure reducing mechanism (213) provided in the first wall (215), A support member (12) used to support the battery cell (20), comprising a first support member (121) and a second support member (122) connected to each other, wherein the first support member (121) and the second support member (122) are located on the same side of the battery cell (20), the first support member (121) is located between the first wall (215) and the second support member (122) and is adhered to the first wall (215), the first support member (121) is provided with a first through hole (1211) corresponding to the pressure reducing mechanism (213), and the second support member (122) is provided with a second through hole (1221) corresponding to the pressure reducing mechanism (213), A battery comprising a first protective member (13) used to seal the second through-hole (1221), which is destroyed when the depressurization mechanism (213) is activated, and which is used to allow discharge from the battery cell (20) to pass through the second support member (122).

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

3. The battery according to claim 1 or 2, characterized in that the first protective member (13) is provided with a first vulnerable region (131), and the first vulnerable region (131) is destroyed by the discharge when the depressurization mechanism (213) is activated, so that the discharge passes through the first vulnerable region (131).

4. The first vulnerable area (131) is, The melting point of the material in the first vulnerable region (131) is lower than the melting point of the material in the remaining part of the first protective member (13), The thickness of the first vulnerable region (131) is thinner than the thickness of the remaining portion of the first protective member (13), The battery according to claim 3, characterized in that at least one of the following is provided: the surface of the first protective member (13) of the first vulnerable region (131) is provided with shallow grooves perpendicular to the thickness direction.

5. The battery according to claim 3 or 4, characterized in that there are multiple pressure reduction mechanisms (213), the first protective member (13) is provided with multiple first vulnerable regions (131), and the multiple first vulnerable regions (131) correspond one-to-one with the multiple pressure reduction mechanisms (213).

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

7. The battery according to any one of claims 1 to 6, further comprising a second protective member (14) used to seal the first through-hole (1211), which is destroyed when the depressurization mechanism (213) is activated, and which is used to allow discharge from the battery cell (20) to pass through the first support member (121).

8. The battery according to claim 7, characterized in that the second protective member (14) is provided on a surface of the first support member (121) that is away from the first wall (215).

9. The battery according to claim 7 or 8, characterized in that the second protective member (14) is provided with a second vulnerable region (141), and the second vulnerable region (141) is destroyed by the discharge when the decompression mechanism (213) is activated, so that the discharge passes through the second protective member (14).

10. The second vulnerable region (141) is, The melting point of the material in the second vulnerable region (141) is lower than the melting point of the material in the remaining part of the second protective member (14), The thickness of the second vulnerable region (141) is thinner than the thickness of the remaining portion of the second protective member (14), The battery according to claim 9, characterized in that at least one of the following is provided: the second vulnerable region (141) has shallow grooves on the surface of the second protective member (14) perpendicular to the thickness direction.

11. Further including an isolation member (15), The isolation member (15) is connected to the first support member (121), The first support member (121) is adhered to the first wall (215) by an adhesive (112), The battery according to any one of claims 1 to 6, characterized in that the isolation member (15) is configured to prevent the adhesive (112) from being applied to the area where the pressure reduction mechanism (213) is located.

12. The battery according to claim 11, characterized in that the isolation member (15) is provided with a groove (150) that opens toward the battery cell (20), at least a portion of the side wall (151) of the groove (150) is located within the first through hole (1211), and the outer edge (152) of the groove (150) is connected to the side wall (151) and is provided between the first support member (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 destroyed by the discharge when the decompression mechanism (213) is activated, and the discharge passes through the isolation member (15).

14. The battery according to claim 13, wherein a third vulnerable region (154) is provided in the bottom wall (153) of the groove (150), and the third vulnerable region (154) is configured to be destroyed by the discharge when the decompression mechanism (213) is activated, allowing the discharge to pass through the isolation member (15).

15. The third vulnerable area (154) is, The melting point of the material in the third weak region (154) is lower than the melting point of the material in the remaining part of the isolation member (15), The thickness of the third vulnerable region (154) is thinner than the thickness of the remaining portion of the isolation member (15), The battery according to claim 14, characterized in that at least one of the following is provided: the third vulnerable region (154) has shallow grooves on the surface of the isolation member (15) perpendicular to the thickness direction.

16. The battery according to any one of claims 11 to 15, further comprising a third protective member (16) connected to a surface of the isolation member (15) away from the depressurization mechanism (213) and protecting the isolation member (15).

17. The battery according to claim 16, characterized in that the isolation member (15) and the third protective member (16) are configured to be destroyed by the discharge from the battery cell (20) when the depressurization mechanism (213) is activated, so that the discharge passes through the isolation member (15) and the third protective member (16).

18. The battery according to claim 16 or 17, characterized in that the melting point of the third protective member (16) is higher than the melting point of the isolation member (15).

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

20. A power consumption device, comprising a battery according to any one of claims 1 to 19, wherein the battery is used to supply electrical energy to the power consumption device.

21. An energy storage device comprising a battery according to any one of claims 1 to 19, wherein the battery is used to store electrical energy in the energy storage device.

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