Batteries, power consumption devices, and energy storage devices

Abstract

Embodiments of the present invention 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 mounting member, an isolation member, and a protective member, wherein a pressure reduction mechanism is provided on the first wall of the battery cell, a first surface of the mounting member is attached to the first wall by adhesive, the isolation member is connected to the mounting member and is configured to prevent the adhesive from being applied between the mounting member and the pressure reduction mechanism, the protective member is connected to a surface of the isolation member away from the pressure reduction mechanism to protect the isolation member, and the mounting member is provided with a first through hole corresponding to the location of the pressure reduction mechanism.

Description

Technical Field

[0001] Cross - reference to related applications This application claims the priority of a Chinese patent application with application number 202323180889.X and title "Battery, Power - consuming Device, and Energy - storage Device", filed on November 24, 2023, and the entire content of the application is incorporated herein by reference.

[0002] This application relates to the field of battery technology, and particularly to batteries, power - consuming devices, and energy - storage devices.

Background Art

[0003] As environmental pollution becomes more serious, the new - energy industry has been attracting increasing attention. In the new - energy industry, battery technology is an important factor related to its development. In the development of battery technology, in addition to improving the electrical 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 reduces the performance of the battery.

Summary of the Invention

Problems to be Solved by the Invention

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

Means for Solving the Problems

[0005] In view of this, the embodiments of the present application provide a battery, a power - consuming device, and an energy - storage device that can improve the performance of the battery.

[0006] According to a first embodiment, a battery is provided comprising a battery cell, a mounting member, an isolation member, and a protective member, wherein a depressurization mechanism is provided on the first wall of the battery cell, a first surface of the mounting member is attached to the first wall by adhesive, the isolation member is connected to the mounting member and is configured to prevent the adhesive from being applied between the mounting member and the depressurization mechanism, the protective member is connected to a surface of the isolation member away from the depressurization mechanism to protect the isolation member, and the mounting member is provided with a first through-hole corresponding to the location of the depressurization mechanism.

[0007] In the embodiment of the present invention, by connecting the protective member to a surface of the isolation member away from the decompression mechanism, the protective member can protect the isolation member, reducing the possibility of damage to the surface of the isolation member away from the decompression mechanism when subjected to vibration, shock, high temperature, etc., and improving the battery's performance.

[0008] In some embodiments, the protective member is located inside the first through-hole. In this way, the protective member is connected to a surface of the isolation member away from the decompression mechanism, and the protective member is located inside the first through-hole, thereby protecting the isolation member, reducing the possibility of damage to the surface of the isolation member away from the decompression mechanism when subjected to vibration, shock, high temperature, etc., improving the battery's performance, while simultaneously the structure is simple to design and easy to install and remove.

[0009] In some embodiments, the protective member is bonded to the inner wall of the first through-hole in order to close the first through-hole.

[0010] In the embodiment of the present application, the protective member is connected to a surface of the isolation member away from the decompression mechanism, and the protective member is bonded to the inner wall of the first through-hole to close the first through-hole, thereby effectively reducing the possibility of damage to the surface of the isolation member away from the decompression mechanism when subjected to vibration, shock, high temperature, etc., and improving the performance of the battery.

[0011] In some embodiments, the protective member is connected to a second surface of the mounting member away from the pressure reduction mechanism in order to close the first through-hole.

[0012] In the embodiment of the present application, the protective member is connected to a surface of the isolation member away from the decompression mechanism, and the protective member is connected to a second surface of the mounting member away from the decompression mechanism, thereby improving the sealing performance of the first through-hole and effectively reducing the possibility of damage to the surface of the isolation member away from the decompression mechanism due to vibration, shock, high temperature, etc., thereby improving the battery's performance.

[0013] In some embodiments, the isolation member and the 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 protective member.

[0014] In the embodiment of the present invention, the isolation member and the 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 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 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.

[0015] In some embodiments, the melting point of the protective member is higher than that of the isolation member.

[0016] In the embodiment of the present invention, by connecting the protective member to a surface of the isolation member away from the depressurization mechanism, and by setting the melting point of the protective member higher than the melting point of the isolation member, the possibility of the surface of the isolation member away from the depressurization mechanism being damaged by vibration, shock, high temperature, etc., can be reduced, thereby improving the performance of the battery.

[0017] In some embodiments, the material of the 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. Thus, in the embodiments of the present application, the material of the 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 one, the insulating performance, heat resistance, and chemical stability of the protective member can be improved, effectively reducing the possibility of damage to the surface of the isolation member away from the depressurization mechanism due to vibration, shock, high temperature, etc., and improving the battery's performance.

[0018] In some embodiments, the isolation member is bonded to the first surface. Thus, in the embodiments of the present application, Isolation member By adhering the adhesive to the first surface, the sealing performance of the connection between the isolation member and the mounting member can be effectively improved, the influence of the adhesive entering the first through-hole on the operating performance of the pressure reduction mechanism is reduced, and the battery's performance is improved.

[0019] In some embodiments, the isolation member is embedded in the first through-hole, or the isolation member is bonded to the inner wall of the first through-hole.

[0020] In the embodiment of the present application, by embedding the isolation member in the first through-hole or by adhering the isolation member to the inner wall of the first through-hole, the influence of adhesive entering the first through-hole on the operating performance of the pressure reduction mechanism can be effectively reduced, thereby improving the battery's performance.

[0021] In some embodiments, the isolation member is provided with a first groove opening toward the battery cell, at least a portion of the side wall of the first groove is located within the first through-hole, the outer edge of the first groove is connected to the side wall and is provided between the first surface and the first wall.

[0022] In an embodiment of the present application, the isolation member is provided with a first groove that opens toward the battery cell, at least a part of the side wall of the first groove is located within the first through hole, the outer edge of the first groove is connected to the side wall, and is provided between the first surface and the first wall, so that when the attachment member is configured to be attached to the first wall by an adhesive, it is possible to effectively prevent the adhesive from being applied between the attachment member and the decompression mechanism, effectively reduce the influence of the adhesive entering the decompression mechanism on the operating performance of the decompression mechanism, and improve the use performance of the battery.

[0023] In some embodiments, in a plane perpendicular to the thickness direction of the bottom wall of the first groove, the projection of the protection member covers the projection of the bottom wall of the first groove.

[0024] In an embodiment of the present application, in a plane perpendicular to the thickness direction of the bottom wall of the first groove, since the projection of the protection member covers the projection of the bottom wall of the first groove, when the surface of the isolation member away from the decompression mechanism is subjected to vibration, impact, high temperature, etc., the possibility of damage can be effectively reduced, and the use performance of the battery can be improved.

[0025] In some embodiments, a second groove that opens toward the battery cell is provided on the surface of the outer edge of the first groove close to the first wall.

[0026] In an embodiment of the present application, when a second groove that opens toward the battery cell is provided on the surface of the outer edge of the first groove close to the first wall, when the isolation member is attached to the first wall, a sealed cavity is formed between the isolation member and the first wall, improving the sealing performance between the isolation member and the battery cell, reducing the risk that the adhesive flows from the gap between the isolation member and the first wall into the decompression mechanism, thereby reducing the influence on the operating performance of the decompression mechanism and improving the use performance of the battery.

[0027] In some embodiments, the battery further includes a seal member provided between the outer edge of the first groove and the first wall, and at least a part of the seal member is accommodated in the second groove.

[0028] In an embodiment of the present application, a first sealing member is provided between the outer edge of the first groove and the first wall, and at least a part of the first sealing member is accommodated in the second groove, so that the sealing performance between the isolation member and the battery cell can be further improved, effectively reducing the risk that the adhesive flows into the decompression mechanism from the gap between the isolation member and the first wall, thereby reducing the influence on the operating performance of the decompression mechanism and improving the use performance of the battery.

[0029] In some embodiments, a protrusion is provided on the outer edge of the first groove. The protrusion protrudes from the first surface and is provided around the decompression mechanism, and is used to prevent the adhesive from being applied between the mounting member and the decompression mechanism.

[0030] In an embodiment of the present application, a protrusion is provided on the outer edge of the first groove. The protrusion protrudes from the first surface and is provided around the decompression mechanism, and is used to prevent the adhesive from being applied between the mounting member and the decompression mechanism. Thereby, the risk that the adhesive flows into the decompression mechanism from the gap between the isolation member and the first wall can be reduced, thereby reducing the influence on the operating performance of the decompression mechanism and improving the use performance of the battery.

[0031] In some embodiments, a fragile area is provided on the bottom wall of the first groove. The fragile area is configured to be broken by the discharge from the battery cell when the decompression mechanism operates, so that the discharge passes through the fragile area.

[0032] In an embodiment of the present application, a fragile area is provided on the bottom wall of the first groove. The fragile area is configured to be broken by the discharge when the decompression mechanism operates. That is, when the internal pressure or temperature of the battery cell reaches the threshold value, the discharge immediately and rapidly passes through the fragile area, realizing rapid decompression of the battery cell, reducing the influence on the operating performance of the decompression mechanism caused by the discharge accumulating in the first groove, and improving the use performance of the battery.

[0033] In some embodiments, the weak region satisfies at least one of the following conditions: the melting point of the material in the weak region is lower than the melting point of the material in the rest of the bottom wall of the first groove; the thickness of the weak region is less than the thickness of the rest of the bottom wall of the first groove; and shallow grooves are provided on the surface of the weak region perpendicular to the thickness direction of the bottom wall of the first groove.

[0034] In the embodiments of the present invention, the weak region is provided such that at least one of the following conditions is met: the melting point of the material in the weak region is lower than the melting point of the material in the remaining part of the bottom wall of the first groove; the thickness of the weak region is less than the thickness of the remaining part of the bottom wall of the first groove; and shallow grooves are provided on the surface of the weak region perpendicular to the thickness direction of the bottom wall of the first groove. As a result, the weak region is more easily destroyed by waste from the battery cell than the remaining part of the bottom wall of the first groove, and when the internal pressure or temperature of the battery cell reaches a threshold, the waste passes through the weak region immediately and quickly, enabling rapid depressurization of the battery cell, reducing the impact of waste accumulation in the first groove on the operating performance of the depressurization mechanism, and improving the battery's performance.

[0035] In some embodiments, the mounting member includes a first mounting member and a second mounting member connected to each other, with a hollow internal cavity formed between the first mounting member and the second mounting member.

[0036] In the embodiment of the present application, the mounting member includes a first mounting member and a second mounting member connected to each other, and is provided such that a hollow internal cavity is formed between the first mounting member and the second mounting member, thereby improving the structural strength and impact resistance of the battery and improving the battery's usability.

[0037] In some embodiments, the hollow internal cavity is used to house a fluid that regulates the temperature of the battery cell.

[0038] In the embodiment of the present invention, the hollow internal cavity formed between the first mounting member and the second mounting member is used to contain a fluid that regulates the temperature of the battery cell, thereby reducing the risk of thermal runaway of the battery cell and improving the battery's performance.

[0039] 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.

[0040] In some embodiments, the power consumption device may be a vehicle, a ship, or an aerospace aircraft.

[0041] 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]

[0042] 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.

[0043] [Figure 1] This is a schematic diagram of the structure of a vehicle according to several embodiments of the present invention. [Figure 2] This is a schematic diagram of the structure of a battery according to several embodiments of the present invention. [Figure 3] This is a schematic diagram of the structure of a battery cell according to several embodiments of the present invention. [Figure 4] This is a schematic diagram of the 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 several embodiments of the present invention. [Figure 6] This is a schematic cross-sectional view of a battery according to another embodiment of the present invention. [Figure 7] This is a schematic cross-sectional view of a battery according to another embodiment of the present invention. [Figure 8] This is a schematic cross-sectional view of a battery according to another embodiment of the present invention. [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 diagram of the structure of an isolation member according to several embodiments 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. [Figure 13] This is a schematic cross-sectional view of a battery according to another embodiment of the present invention. [Figure 14] This is a schematic cross-sectional view of a battery according to another embodiment of the present invention. [Figure 15] This is a schematic cross-sectional view of a battery according to another embodiment of the present invention.

[0044] In drawings, the drawings are not drawn according to actual proportions. [Modes for carrying out the invention]

[0045] Embodiments of the present application will be described in more detail below with reference to the drawings and examples. The detailed description of the following embodiments and drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application, and the present application is not limited to the embodiments described.

[0046] In describing the embodiments of this application, unless otherwise stated, "multiple" means two or more, and the directions or positional relationships indicated by terms such as "up," "down," "left," "right," "inside," and "outside" are merely for the purpose of facilitating and simplifying the description of this application. They do not indicate or imply that the devices or elements in question have a specific direction, or that they are composed of and should be operated in a specific direction, and therefore should not be understood as limiting the embodiments of this application. Furthermore, terms such as "first," "second," and "third" are used solely for explanatory purposes and should not be understood as indicating or implying relative importance. "Perpendicular" does not mean perpendicular in the strict sense, but rather within an acceptable margin of error. "Parallel" does not mean parallel in the strict sense, but rather within an acceptable margin of error.

[0047] All directional expressions appearing in the following description refer to the directions shown in the figures and do not limit the specific structure of the present application. Further explanation in the description of the embodiments of the present application is that, unless otherwise explicitly specified and limited, the terms “attached,” “connected,” and “connected” should be understood in a broad sense. For example, they may be fixed connections, removable connections, or integral connections. They may be directly connected or indirectly connected via an intermediate medium. Those skilled in the art will be able to understand the specific meaning of these terms in the embodiments of the present application depending on the specific circumstances.

[0048] The term "and / or" in the embodiments of this application merely describes the relationship or connection between related objects, indicating that three types of relationships are possible. For example, A and / or B can represent three situations: A exists, A and B exist simultaneously, and B exists. The symbol " / " in the embodiments of this application generally indicates that the preceding and succeeding related objects are in an "or" relationship.

[0049] 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 to which this application pertains. The terms used in the applied-for specification in the embodiments of this application are intended solely to describe specific embodiments and are not intended to limit the embodiments of this application. The terms “includes” and “has” and their synonyms in the description of the embodiments and claims of this application, and in the description of the drawings above, are intended to be non-exclusive. Terms such as “first,” “second,” etc., in the description of the embodiments and claims of this application or in the drawings above are used to distinguish different subjects and are not used to describe a particular order or hierarchical relationship.

[0050] In this Application, the term “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.

[0051] In the embodiments of this application, a battery refers to a physical module containing one or more battery cells to provide 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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-surface-treated 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).

[0057] 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.

[0058] As an example, the positive electrode active material may include at least one of sodium transition metal oxides, polyanionic compounds, and Prussian blue compounds.

[0059] 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.

[0060] 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.

[0061] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0062] 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-surface-treated 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).

[0063] In some embodiments, the battery cell in the embodiment of the present application may be a negative electrode-free sodium secondary battery.

[0064] 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.

[0065] In some embodiments, to improve the performance of the battery cell, several functional coating layers may be provided on the negative electrode side of the 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.

[0066] 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.

[0067] In some embodiments, the electrode assembly further includes an isolation element placed between the positive and negative electrodes.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form multiple stacked folded sections.

[0076] For example, multiple isolation elements may be installed, each placed between any adjacent positive or negative electrode sheets.

[0077] 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.

[0078] In some embodiments, the shape of the electrode assembly may be cylindrical, flattened, or polygonal prism-shaped, etc.

[0079] 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.

[0080] 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.

[0081] 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. A prismatic battery cell includes a rectangular battery cell, a blade-shaped battery cell, and a polygonal prismatic battery, and a polygonal prismatic battery is a hexagonal prismatic battery, etc.

[0082] To meet different power demands, the battery of the embodiment of the present application may include multiple 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. In some embodiments, multiple battery cells may first be connected in series, in parallel, or in series-parallel to form a battery module, and the multiple battery modules may further be connected in series, in parallel, or in series-parallel to form a battery. That is, multiple 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.

[0083] 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.

[0084] 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 modules are housed within the housing.

[0085] In some embodiments, the housing in the embodiments of the present application may be part of the vehicle's chassis structure. For example, the housing may be part of at least a portion of the vehicle's bottom plate, or it may be part of at least a portion of the vehicle's cross members and side members.

[0086] 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 installation and manufacturing process of batteries, it is necessary to bond the battery cells to the housing. If the adhesive overflows to the location of the pressure reduction mechanism of the battery cells, it will affect the operation of the pressure reduction mechanism and reduce the battery's performance. Therefore, how to improve battery performance is an urgent technical challenge that needs to be addressed in this field.

[0087] In view of this, an embodiment of the present application provides a battery including a battery cell, a mounting member, an isolation member, and a protective member, wherein a pressure reduction mechanism is provided on the first wall of the battery cell, the first surface of the mounting member is attached to the first wall by adhesive, the isolation member is connected to the mounting member, the isolation member is configured to prevent the adhesive from being applied between the mounting member and the pressure reduction mechanism, and the protective member is connected to a surface of the isolation member away from the pressure reduction mechanism in order to protect the isolation member. In this way, by connecting the protective member to a surface of the isolation member away from the pressure reduction mechanism, the protective member can protect the isolation member, reducing the possibility of damage to the surface of the isolation member away from the pressure reduction mechanism when subjected to vibration, shock, high temperature, etc., and improving the performance of the battery.

[0088] The technical solutions described in the embodiments of this application are all applicable to power consumption devices that use batteries. For example, such power consumption devices may be vehicles, mobile phones, portable devices, laptop computers, ships, aerospace vehicles, electric toys, and power tools. Vehicles may be gasoline cars, natural gas cars, or new energy cars, and new energy cars may be pure electric cars, hybrid cars, or range extender cars, etc. Aerospace vehicles 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.

[0089] 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.

[0090] For example, Figure 1 shows a schematic diagram of the structure of a vehicle 1 according to an embodiment of the present application, and 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, and for example, the battery 10 can be used as the operating power source of the vehicle 1, for the circuit system of the vehicle 1, and further for example, the battery 10 can supply the operating power needs of the vehicle 1 for starting, navigation, and driving. In some embodiments of the present application, the battery 10 can provide driving power to the vehicle 1 not only as the operating power source of the vehicle 1, but also as the driving power source of the vehicle 1, by substituting or partially substituting fuel or natural gas.

[0091] To meet different power consumption demands, the battery 10 in the embodiment of the present application may include at least one battery cell module, the battery cell module may include multiple battery cells, and the multiple battery cells may be electrically connected in series, parallel, or series-parallel to form the battery 10, where series-parallel 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 connections, and 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.

[0092] In some embodiments, the battery 10 may include a plurality of battery cells 20. 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.

[0093] 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.

[0094] 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 configuration.

[0095] 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 cover plate 212 are both called the 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 of the planes of the housing 211 is an opening, and this plane has no wall 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 to form a sealed cavity in which the electrode assembly 22 is placed. The housing 211 is filled with an electrolyte, such as an electrolyte solution.

[0096] The battery cell 20 may further include two electrode terminals 214 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.

[0097] 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.

[0098] In the battery cell 20, one or more electrode assemblies 22 can be installed depending on the requirements of actual use, and Figure 3 shows that two independent electrode assemblies 22 are installed in the battery cell 20.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] In some embodiments, as shown in Figures 4 to 6, the battery 10 includes a battery cell 20, a mounting member 13, an isolation member 14, and a protective member 15, wherein a depressurization mechanism 213 is provided on a first wall 215 of the battery cell 20, a first surface 131 of the mounting member 13 is attached to the first wall 215 by an adhesive 216, the isolation member 14 is connected to the mounting member 13 and is configured to prevent the adhesive 216 from being applied between the mounting member 13 and the depressurization mechanism 213, and the protective member 15 is connected to a surface of the isolation member 14 away from the depressurization mechanism 213 to protect the isolation member 14.

[0103] In the embodiments of this application, the first wall 215 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.

[0104] Furthermore, in the embodiments of this application, the adhesive 216 for bonding the mounting member 13 to the first wall 215 includes, but is not limited to, polyurethane adhesive, acrylic adhesive, and silicone rubber adhesive.

[0105] Furthermore, in the embodiments of the present application, the isolation member 14 and the mounting member 13 may be connected by adhesive, and, exemplary, the isolation member 14 and the mounting member 13 may be connected by an adhesive 216.

[0106] Furthermore, in the embodiments of the present application, the protective member 15 and the isolation member 14 may be connected by adhesive, or, more exemplary, by an adhesive 216.

[0107] Furthermore, in the embodiment of the present invention, as shown in Figure 5, a housing pressure reducing valve 12 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 12 is used to discharge the 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.

[0108] In the embodiment of the present invention, the protective member 15 is connected to a surface of the isolation member 14 away from the depressurization mechanism 213, thereby protecting the isolation member 14, reducing the possibility of damage to the surface of the isolation member 14 away from the depressurization mechanism 213 when subjected to vibration, shock, high temperature, etc., and improving the performance of the battery 10.

[0109] In some embodiments, as shown in Figures 5 and 6, the mounting member 13 is provided with a first through-hole 132 corresponding to the position of the pressure reducing mechanism 213.

[0110] In the embodiments of this application, the shape of the first through-hole 132 in the direction perpendicular to the thickness direction of the mounting member 13 can be set according to actual requirements. For example, the shape of the first through-hole 132 may be set according to the shape of the pressure reduction mechanism 213 of the battery cell 20. Exemplary shapes of the first through-hole 132 include, but are not limited to, circular, elliptical, rectangular, and regular polygonal shapes.

[0111] Furthermore, in the embodiment of the present application, the provision of a first through-hole 132 in the mounting member 13 corresponding to the position of the pressure reducing mechanism 213 means that the orthographic projection of the first through-hole 132 in a plane perpendicular to the thickness direction of the mounting member 13 may be larger than, smaller than, or equal to the orthographic projection of the pressure reducing mechanism 213 in a plane perpendicular to the thickness direction of the mounting member 13.

[0112] In the embodiment of the present invention, the mounting member 13 is provided with a first through-hole 132 corresponding to the position of the pressure reducing mechanism 213. When the pressure reducing mechanism 213 of the battery cell 20 is activated, the waste discharged from the pressure reducing mechanism 213 passes smoothly through the first through-hole 132 and is discharged from the electrical cavity, thereby reducing the thermal impact on the battery cell 20 and improving the operating performance of the battery 10.

[0113] In some embodiments, as shown in Figure 6, the protective member 15 is located inside the first through-hole 132. In this way, the protective member 15 is connected to a surface of the isolation member 14 away from the decompression mechanism 213, and the protective member 15 is located inside the first through-hole 132, thereby protecting the isolation member 14, reducing the possibility of damage to the surface of the isolation member 14 away from the decompression mechanism 213 when subjected to vibration, shock, high temperature, etc., improving the performance of the battery 10, while at the same time the structure is simple in design and easy to install and remove.

[0114] Figure 7 shows a schematic partial cross-sectional view of a battery 10 according to another embodiment of the present invention.

[0115] In some embodiments, as shown in Figure 7, the protective member 15 is bonded to the inner wall of the first through-hole 132 to seal the first through-hole 132. Thus, in the embodiments of the present application, the protective member 15 is connected to a surface of the isolation member 14 away from the decompression mechanism 213, and the protective member 15 is bonded to the inner wall of the first through-hole 132 to close the first through-hole 132, thereby effectively reducing the possibility of damage to the surface of the isolation member 14 away from the decompression mechanism 213 when subjected to vibration, shock, high temperature, etc., and improving the performance of the battery 10.

[0116] Figure 8 shows a schematic partial cross-sectional view of a battery 10 according to another embodiment of the present invention.

[0117] In some embodiments, as shown in Figure 8, the protective member 15 is connected to a second surface 133 of the mounting member 13, away from the pressure reducing mechanism 213, in order to close the first through hole 132.

[0118] In the embodiment of the present application, the protective member 15 is connected to a surface of the isolation member 14 away from the pressure reducing mechanism 213, and the protective member 15 is connected to a second surface 133 of the mounting member 13 away from the pressure reducing mechanism 213, thereby improving the sealing performance of the first through-hole 132 and effectively reducing the possibility of damage to the surface of the isolation member 14 away from the pressure reducing mechanism 213 due to vibration, shock, high temperature, etc., thereby improving the performance of the battery 10.

[0119] In some embodiments, the isolation member 14 and the protective member 15 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 14 and the protective member 15. Thus, in the embodiments of the present application, the isolation member 14 and the protective member 15 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 14 and the protective member 15. In this way, during the operation of the depressurization mechanism 213, the discharge from the depressurization mechanism 213 passes smoothly through the isolation member 14 and the protective member 15 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.

[0120] In some embodiments, the melting point of the protective member 15 is higher than that of the isolation member 14. Thus, in the embodiments of the present application, by connecting the protective member 15 to a surface of the isolation member 14 away from the pressure reduction mechanism 213, and setting the melting point of the protective member 15 higher than that of the isolation member 14, the possibility of damage to the surface of the isolation member 14 away from the pressure reduction mechanism 213 due to vibration, shock, high temperature, etc., can be reduced, thereby improving the performance of the battery 10.

[0121] In some embodiments, the material of the protective member 15 includes at least one of polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin. Thus, in the embodiments of the present application, by setting the material of the protective member 15 to at least one of polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin, the insulation performance, heat resistance, and chemical stability of the protective member 15 can be improved, effectively reducing the possibility of damage to the surface of the isolation member 14 away from the depressurization mechanism 213 due to vibration, shock, high temperature, etc., and improving the performance of the battery 10.

[0122] Figure 9 shows a schematic partial cross-sectional view of a battery 10 according to another embodiment of the present invention.

[0123] In some embodiments, as shown in Figure 9, the isolation member 14 is bonded to the first surface 131. In this way, in the embodiments of the present application, by bonding the isolation member 14 to the first surface 131, the sealing performance of the connection between the isolation member 14 and the mounting member 13 can be effectively improved, the influence of the adhesive 216 entering the first through hole 132 on the operating performance of the pressure reducing mechanism 213 is reduced, and the operating performance of the battery 10 is improved.

[0124] Figure 10 shows a schematic diagram of the structure of an isolation member 14 according to several embodiments of the present invention.

[0125] In some embodiments, as shown in Figures 8 to 10, the isolation member 14 is embedded in the first through-hole 132, or the isolation member 14 is bonded to the inner wall of the first through-hole 132.

[0126] In the embodiment of the present invention, by embedding the isolation member 14 in the first through-hole 132 or by adhering the isolation member 14 to the inner wall of the first through-hole 132, the influence of the adhesive 216 entering the first through-hole 132 on the operating performance of the pressure reducing mechanism 213 can be effectively reduced, thereby improving the operating performance of the battery 10.

[0127] In some embodiments, as shown in Figures 6 to 10, the isolation member 14 is provided with a first groove 140 that opens toward the battery cell 20, at least a portion of the side wall 141 of the first groove 140 is located within the first through hole 132, the outer edge 142 of the first groove 140 is connected to the side wall 141 and is provided between the first surface 131 and the first wall 215.

[0128] In the embodiment of the present application, the isolation member 14 is provided with a first groove 140 that opens toward the battery cell 20, at least a portion of the side wall 141 of the first groove 140 is located within the first through hole 132, and the outer edge 142 of the first groove 140 is connected to the side wall 141 and provided between the first surface 131 and the first wall 215, so that the mounting member 13 is attached to the first wall 215 by adhesive 216, the adhesive 216 can be effectively prevented from being applied between the mounting member 13 and the pressure reducing mechanism 213, the influence of the adhesive 216 entering the pressure reducing mechanism 213 on the operating performance of the pressure reducing mechanism 213 can be effectively reduced, and the usage performance of the battery 10 can be improved.

[0129] In some embodiments, the projection of the protective member 15 covers the projection of the bottom wall 143 of the first groove 140 in a plane perpendicular to the thickness direction of the bottom wall 143 of the first groove 140.

[0130] In the embodiments of this application, the shape of the bottom wall 143 of the first groove 140 can be set according to the actual requirements. For example, the shape of the bottom wall 143 of the first groove 140 can be set according to the shape of the first through hole 132 or the shape of the pressure reduction mechanism 213 of the battery cell 20. Exemplarily, the shape of the bottom wall 143 of the first groove 140 includes, but is not limited to, a circular, elliptical, rectangular, or regular polygon shape.

[0131] In the embodiments of the present application, the projection of the protective member 15 or the bottom wall 143 of the first groove 140 onto a plane perpendicular to the thickness direction of the bottom wall 143 of the first groove 140 may be an orthographic projection in the thickness direction, or the projection of the protective member 15 or the bottom wall 143 of the first groove 140 onto a plane perpendicular to the thickness direction of the bottom wall 143 of the first groove 140 may be a projection in another direction.

[0132] In the embodiment of the present invention, the projection of the protective member 15 covers the projection of the bottom wall 143 of the first groove 140 in a plane perpendicular to the thickness direction of the bottom wall 143 of the first groove 140, thereby effectively reducing the possibility of damage to the surface of the isolation member 14 away from the decompression mechanism 213 when subjected to vibration, shock, high temperature, etc., and improving the performance of the battery 10.

[0133] Figure 11 shows a schematic partial cross-sectional view of a battery 10 according to another embodiment of the present invention.

[0134] In some embodiments, as shown in Figure 11, a second groove 150 is provided on the outer edge 142 of the first groove 140, near the first wall 215, opening toward the battery cell 20.

[0135] In the embodiments of this application, the shape of the bottom wall of the second groove 150 can be set according to the actual requirements, and exemplary shapes of the bottom wall of the second groove 150 include, but are not limited to, circular, elliptical, rectangular, and regular polygonal shapes.

[0136] In the embodiment of the present application, a second groove 150 opening toward the battery cell 20 is provided on the surface of the outer edge 142 of the first groove 140 near the first wall 215. When the isolation member 14 is attached to the first wall 215, a sealed cavity is formed between the isolation member 14 and the first wall 215, improving the airtightness between the isolation member 14 and the battery cell 20, reducing the risk of adhesive 216 flowing into the depressurization mechanism 213 through the gap between the isolation member 14 and the first wall 215, thereby reducing the impact on the operating performance of the depressurization mechanism 213 and improving the usability of the battery 10.

[0137] Figure 12 shows a schematic partial cross-sectional view of a battery 10 according to another embodiment of the present invention.

[0138] In some embodiments, as shown in Figure 12, the battery 10 further includes a sealing member 16 provided between the outer edge 142 of the first groove 140 and the first wall 215, with at least a portion of the sealing member 16 housed in the second groove 150.

[0139] In the embodiments of this application, the shape of the sealing member 16 can be set according to the actual requirements, and exemplary, the shape of the sealing member 16 is set according to the shape of the second groove 150. For example, in a cross section perpendicular to the thickness direction of the bottom wall of the second groove 150, the shape of the sealing member 16 includes, but is not limited to, annular, circular, elliptical, square, and regular polygonal shapes. Furthermore, for example, if the shape of the second groove 150 is annular in a cross section perpendicular to the height direction of the housing 11, the shape of the sealing member 16 in the embodiments of this application may be an annular structure that conforms to the shape of the second groove 150.

[0140] Furthermore, in the embodiments of this application, the material of the sealing member 16 includes, but is not limited to, rubber, polytetrafluoroethylene, polyethylene, polypropylene, and polyurethane.

[0141] In the embodiment of the present application, a sealing member 16 is provided between the outer edge 142 of the first groove 140 and the first wall 215, and at least a portion of the sealing member 16 is housed in the second groove 150. This further improves the airtightness between the isolation member 14 and the battery cell 20, effectively reducing the risk of the adhesive 216 flowing into the depressurization mechanism 213 through the gap between the isolation member 14 and the first wall 215, thereby reducing the impact on the operating performance of the depressurization mechanism 213 and improving the usability of the battery 10.

[0142] Figure 13 shows a schematic partial cross-sectional view of a battery 10 according to another embodiment of the present invention.

[0143] In some embodiments, as shown in Figure 13, a projection 144 is provided on the outer edge 142 of the first groove 140, the projection 144 protruding from the first surface 131 and provided around the pressure reducing mechanism 213, and the projection 144 is used to prevent the adhesive 216 from being applied between the mounting member 13 and the pressure reducing mechanism 213.

[0144] In the embodiment of the present application, the fact that the protrusion 144 protrudes from the first surface 131 and is provided around the pressure reducing mechanism 213 means that the protrusion 144 protrudes toward the battery cell 20 or toward the first wall 215 of the battery cell 20, thereby reducing the risk that the adhesive between the mounting member 13 and the first wall 215 of the battery cell 20 will flow through the gap between the isolation member 14 and the first wall 215 to the pressure reducing mechanism 213.

[0145] Furthermore, in the embodiments of the present application, the shape of the projection 144 can be set according to the actual requirements so as to prevent the adhesive from flowing through the gap between the isolation member 14 and the first wall 215 to the decompression mechanism 213. For example, the shape of the projection 144 may be an annular structure projecting toward the first wall 215, and the annular structure may be provided around the decompression mechanism 213.

[0146] In the embodiment of the present application, a projection 144 is provided on the outer edge 142 of the first groove 140, the projection 144 protruding from the first surface 131 and provided around the pressure reducing mechanism 213, and the projection 144 is used to prevent the adhesive 216 from being applied between the mounting member 13 and the pressure reducing mechanism 213, thereby reducing the risk of the adhesive 216 flowing into the pressure reducing mechanism 213 from the gap between the isolation member 14 and the first wall 215, thereby reducing the impact on the operating performance of the pressure reducing mechanism 213 and improving the performance of the battery 10.

[0147] In some embodiments, a vulnerable region is provided in the bottom wall 143 of the first groove 140, and the vulnerable region is 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 vulnerable region.

[0148] In the embodiment of the present invention, at least a portion of the bottom wall 143 of the first groove 140 can be set as a fragile region, so that when the decompression mechanism 213 is activated, it is destroyed by the discharged material, and the discharged material passes through the fragile region.

[0149] Furthermore, in embodiments of the present application, the shape of the vulnerable region in a direction perpendicular to the thickness direction of the bottom wall 143 of the first groove 140 can be set according to actual requirements, for example, the shape of the vulnerable region can be set according to the shape of the decompression mechanism 213 of the battery cell 20, and the shape of the vulnerable region includes, but is not limited to, a circular, elliptical, rectangular, or regular polygon shape.

[0150] Furthermore, the number of vulnerable areas provided on the bottom wall 143 of the first groove 140 can be set according to the actual requirements; for example, the number of vulnerable areas may be one or multiple.

[0151] In the embodiment of the present invention, a vulnerable region is provided in the bottom wall 143 of the first groove 140, and the vulnerable region is configured to be destroyed by the discharged material when the decompression mechanism 213 is activated. That is, when the internal pressure or temperature of the battery cell 20 reaches a threshold, the discharged material immediately and quickly passes through the vulnerable region, enabling rapid decompression of the battery cell 20. The accumulation of the discharged material in the first groove 140 reduces the impact on the operating performance of the decompression mechanism 213, thereby improving the usability of the battery 10.

[0152] In some embodiments, the weak region satisfies at least one of the following conditions: the melting point of the material in the weak region is lower than the melting point of the material in the rest of the bottom wall 143 of the first groove 140; the thickness of the weak region is less than the thickness of the rest of the bottom wall 143 of the first groove 140; and shallow grooves are provided on the surface of the weak region perpendicular to the thickness direction of the bottom wall 143 of the first groove 140.

[0153] In the embodiment of the present invention, the melting point of the material in the weak region can be set to a preset threshold or lower, thereby, when the decompression mechanism 213 is activated, the weak region is more easily melted by the discharged material passing through the decompression mechanism 213 than the remaining portion of the bottom wall 143 of the first groove 140. Furthermore, the thickness of the weak region can be set to less than the thickness of the remaining portion of the bottom wall 143 of the first groove 140, and since the weak region is thinner than the remaining portion of the bottom wall 143 of the first groove 140, when the decompression mechanism 213 is activated, the weak region is more easily destroyed by the discharged material passing through the decompression mechanism 213 than the remaining portion of the bottom wall 143 of the first groove 140.

[0154] Furthermore, in the embodiments of the present application, the shape of the shallow groove provided on the surface perpendicular to the thickness direction of the bottom wall 143 of the first groove 140 in the vulnerable region can be set according to the actual requirements, and exemplary the shallow groove may be a cross-shaped shallow groove, a rice-shaped shallow groove, or an I-shaped shallow groove, but is not limited thereto.

[0155] In the embodiment of the present application, the fragile region is provided such that at least one of the following conditions is met: the melting point of the material in the fragile region is lower than the melting point of the material in the remaining part of the bottom wall 143 of the first groove 140; the thickness of the fragile region is less than the thickness of the remaining part of the bottom wall 143 of the first groove 140; and shallow grooves are provided on the surface of the fragile region perpendicular to the thickness direction of the bottom wall 143 of the first groove 140. As a result, the fragile region is more easily destroyed by waste from the battery cell 20 than the remaining part of the bottom wall 143 of the first groove 140. When the internal pressure or temperature of the battery cell 20 reaches a threshold, the waste immediately and quickly passes through the fragile region, enabling rapid decompression of the battery cell 20. The accumulation of waste in the first groove 140 reduces the impact on the operating performance of the decompression mechanism 213, thereby improving the usability of the battery 10.

[0156] Figure 14 shows a schematic cross-sectional view of a battery 10 according to another embodiment of the present application. Figure 15 shows a schematic partial cross-sectional view of a battery 10 according to another embodiment of the present application. Exemplarily, Figure 15 may be an enlarged schematic cross-sectional view of the corresponding portion of the battery 10 in Figure 14.

[0157] In some embodiments, the mounting member 13 includes a first mounting member 134 and a second mounting member 135 connected to each other, with a hollow internal cavity 136 formed between the first mounting member 134 and the second mounting member 135.

[0158] In the embodiments of the present application, the average distance between the first mounting member 134 and the second mounting member 135 can be set according to the actual requirements so as to satisfy the structural strength of the battery 10. Furthermore, in the embodiments of the present application, the battery 10 further includes a plurality of other mounting members, for example, a third mounting member, the third mounting member may be provided on the side of the second mounting member 135 away from the pressure reducing mechanism 213 of the battery 10, or the third mounting member may be provided between the first mounting member 134 and the second mounting member 135.

[0159] In the embodiment of the present application, the mounting member 13 includes a first mounting member 134 and a second mounting member 135 connected to each other, and is provided such that a hollow internal cavity 136 is formed between the first mounting member 134 and the second mounting member 135, thereby improving the structural strength and impact resistance of the battery 10 and improving the usability of the battery 10.

[0160] In some embodiments, the hollow internal cavity 136 is used to contain a fluid that regulates the temperature of the battery cell 20. Thus, in embodiments of the present application, the hollow internal cavity 136 formed between the first mounting member 134 and the second mounting member 135 is used to contain a fluid that regulates the temperature of the battery cell 20, thereby reducing the risk of thermal runaway of the battery cell 20 and improving the operating performance of the battery 10.

[0161] Referring again to Figures 4 to 6, 10, 14 and 15 above, a battery 10 is provided, comprising a battery cell 20, a mounting member 13, an isolation member 14, and a protective member 15, wherein a depressurization mechanism 213 is provided in the first wall 215 of the battery cell 20, a first surface 131 of the mounting member 13 is attached to the first wall 215 by adhesive 216, the isolation member 14 is connected to the mounting member 13 and is configured to prevent the adhesive 216 from being applied between the mounting member 13 and the depressurization mechanism 213, the protective member 15 is connected to the surface of the isolation member 14 away from the depressurization mechanism 213 to protect the isolation member 14, and the mounting member 13 is provided with a first through hole 132 corresponding to the location of the depressurization mechanism 213. The protective member 15 is located inside the first through-hole 132, and the isolation member 14 is provided with a first groove 140 opening toward the battery cell 20, at least a portion of the side wall 141 of the first groove 140 is located inside the first through-hole 132, the outer edge 142 of the first groove 140 is connected to the side wall 141 and is provided between the first surface 131 and the first wall 215. In a plane perpendicular to the thickness direction of the bottom wall 143 of the first groove 140, the projection of the protective member 15 covers the projection of the bottom wall 143 of the first groove 140. The mounting member 13 includes a first mounting member 134 and a second mounting member 135 connected to each other, with a hollow internal cavity 136 formed between the first mounting member 134 and the second mounting member 135, the hollow internal cavity 136 is used to contain a fluid that regulates the temperature of the battery cell 20.

[0162] 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.

[0163] 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.

[0164] Although the present application has been described with reference to the embodiments described above, various improvements can be made and components can be replaced with equivalents without departing from the scope of the embodiments of the present 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]

[0165] 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 12-Housing Pressure Reducing Valve 13-Mounting parts 14-Isolation Member 15-Protective component 216-Adhesive 131-1st surface 132-First through hole 133-Second surface 140-1st groove 141-side wall 142 - Outer edge 143 - Bottom Wall 144-Protrusion 150-Second groove 16-Sealing Member 134-First mounting member 135-Second mounting member 136 - Hollow internal cavity

Claims

1. It is a battery, It includes a battery cell (20), a mounting member (13), an isolation member (14), and a protective member (15), A pressure reducing mechanism (213) is provided on the first wall (215) of the battery cell (20). The first surface (131) of the mounting member (13) is attached to the first wall (215) by adhesive (216). The isolation member (14) is connected to the mounting member (13), and the isolation member (14) is configured to prevent the adhesive (216) from being applied between the mounting member (13) and the pressure reducing mechanism (213). The protective member (15) is connected to a surface of the isolation member (14) away from the decompression mechanism (213) in order to protect the isolation member (14). The battery is characterized in that the mounting member (13) is provided with a first through-hole (132) corresponding to the position of the pressure reducing mechanism (213).

2. The battery according to claim 1, characterized in that the protective member (15) is located inside the first through hole (132).

3. The battery according to claim 1 or 2, characterized in that the protective member (15) is adhered to the inner wall of the first through hole (132) in order to close the first through hole (132).

4. The battery according to any one of claims 1 to 3, characterized in that the protective member (15) is connected to a second surface (133) of the mounting member (13) away from the pressure reduction mechanism in order to close the first through hole (132).

5. The battery according to any one of claims 1 to 4, characterized in that the isolation member (14) and the protective member (15) are destroyed by the discharge from the battery cell (20) when the pressure reduction mechanism (213) is activated, and the discharge passes through the isolation member (14) and the protective member (15).

6. The battery according to any one of claims 1 to 5, characterized in that the melting point of the protective member (15) is higher than the melting point of the isolation member (14).

7. The battery according to any one of claims 1 to 6, characterized in that the material of the protective member (15) is at least one of polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin.

8. The battery according to any one of claims 1 to 7, characterized in that the isolation member (14) is bonded to the first surface (131).

9. The battery according to any one of claims 1 to 8, characterized in that the isolation member (14) is embedded in the first through hole (132) or the isolation member (14) is bonded to the inner wall of the first through hole (132).

10. The battery according to any one of claims 1 to 9, characterized in that the isolation member (14) is provided with a first groove (140) that opens toward the battery cell (20), at least a portion of the side wall (141) of the first groove (140) is located within the first through hole (132), the outer edge (142) of the first groove (140) is connected to the side wall (141), and is provided between the first surface (131) and the first wall (215).

11. The battery according to claim 10, characterized in that, in a plane perpendicular to the thickness direction of the bottom wall (143) of the first groove (140), the projection of the protective member (15) covers the projection of the bottom wall (143) of the first groove (140).

12. The battery according to claim 10 or 11, characterized in that a second groove (150) opening toward the battery cell (20) is provided on the surface of the outer edge (142) of the first groove (140) near the first wall (215).

13. The battery according to claim 12, further comprising a sealing member (16) provided between the outer edge (142) of the first groove (140) and the first wall (215), wherein at least a portion of the sealing member (16) is housed in the second groove (150).

14. A battery according to any one of claims 10 to 13, characterized in that a projection (144) is provided on the outer edge (142) of the first groove (140), the projection (144) protrudes from the first surface (131) and is provided around the pressure reducing mechanism (213), and the projection (144) is used to prevent the adhesive (216) from being applied between the mounting member (13) and the pressure reducing mechanism (213).

15. A battery according to any one of claims 10 to 14, characterized in that a vulnerable region is provided in the bottom wall (143) of the first groove (140), and the vulnerable region is destroyed by discharge from the battery cell when the decompression mechanism (213) is activated, so that the discharge passes through the vulnerable region.

16. The aforementioned vulnerable area is The melting point of the material in the weak region is lower than the melting point of the material in the remaining part of the bottom wall (143) of the first groove (140). The thickness of the vulnerable region is less than the thickness of the remaining portion of the bottom wall (143) of the first groove (140). The battery according to claim 15, characterized in that at least one of the following is satisfied: shallow grooves are provided on the surface perpendicular to the thickness direction of the bottom wall (143) of the first groove (140) of the vulnerable region.

17. The battery according to any one of claims 1 to 16, characterized in that the mounting member (13) includes a first mounting member (134) and a second mounting member (135) connected to each other, and a hollow internal cavity (136) is formed between the first mounting member (134) and the second mounting member (135).

18. The battery according to claim 17, characterized in that the hollow internal cavity (136) is used to house a fluid that regulates the temperature of the battery cell (20).

19. A power consumption device comprising a battery according to any one of claims 1 to 18, wherein the battery is used to supply electrical energy to the power consumption device.

20. An energy storage device comprising a battery according to any one of claims 1 to 18, wherein the battery is used to store electrical energy in the energy storage device.

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