Battery, electric device and energy storage device

Abstract

Embodiments of the present application provide a battery, an electric device, and an energy storage device, and allow for improved battery performance. The battery comprises: a battery cell, a first wall of the battery cell being provided with a pressure relief mechanism; an attachment component, a first surface of the attachment component being attached to the first wall by means of an adhesive; an isolation component connected to the attachment component, the isolation component being configured to prevent the adhesive from getting between the attachment component and the pressure relief mechanism; and a protection component connected to that surface of the isolation component facing away from the pressure relief mechanism, said protection component being used to protect the isolation component; wherein, the attachment component is provided with a first through hole corresponding to the position of the pressure relief mechanism.

Description

Batteries, electrical equipment and energy storage equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application 202323180889.X, filed on November 24, 2023, entitled “Batteries, Electrical Equipment and Energy Storage Equipment,” the entire contents of which are incorporated by reference into this application. Technical Field

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

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

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

[0006] Summary of the Invention

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

[0008] In a first aspect, a battery is provided, comprising: a battery cell, a first wall of which is provided with a pressure relief mechanism; an attachment component, a first surface of which is attached to the first wall by an adhesive; an isolation component connected to the attachment component, the isolation component being configured to prevent the adhesive from being applied between the attachment component and the pressure relief mechanism; and a protective component connected to a surface of the isolation component facing away from the pressure relief mechanism to protect the isolation component; wherein the attachment component is provided with a first through hole corresponding to the position of the pressure relief mechanism.

[0009] In an embodiment of the present application, the protective component is connected to the surface of the isolation component facing away from the pressure relief mechanism, so that the protective component can protect the isolation component, thereby reducing the possibility of damage to the surface of the isolation component facing away from the pressure relief mechanism when subjected to vibration, impact, high temperature, etc., thereby improving the performance of the battery.

[0010] In some implementations, the protective component is located within the first through-hole. Thus, by connecting the protective component to the surface of the isolation component facing away from the pressure relief mechanism and positioning the protective component within the first through-hole, the isolation component can be protected, thereby reducing the likelihood of damage to the surface of the isolation component facing away from the pressure relief mechanism due to vibration, impact, high temperature, and the like, thereby improving the performance of the battery. Furthermore, the structural design is simple and facilitates installation and removal.

[0011] In some implementations, the protective component is bonded to an inner wall of the first through hole to close the first through hole.

[0012] In an embodiment of the present application, by connecting the protective component to the surface of the isolation component facing away from the pressure relief mechanism, and the protective component being adhered to the inner wall of the first through hole to close the first through hole, the possibility of damage to the surface of the isolation component facing away from the pressure relief mechanism due to vibration, impact, high temperature, etc. can be effectively reduced, thereby improving the performance of the battery.

[0013] In some implementations, the protective component is connected to a second surface of the attachment component facing away from the pressure relief mechanism to close the first through hole.

[0014] In an embodiment of the present application, by connecting the protective component to the surface of the isolation component facing away from the pressure relief mechanism, and connecting the protective component to the second surface of the attachment component facing away from the pressure relief mechanism, the sealing of the first through hole can be improved, so as to effectively reduce the possibility of damage to the surface of the isolation component facing away from the pressure relief mechanism when subjected to vibration, impact, high temperature, etc., thereby improving the performance of the battery.

[0015] In some implementations, the isolation component and the protective component are configured to be broken by emissions from the battery cells when the pressure relief mechanism is actuated, so that the emissions pass through the isolation component and the protective component.

[0016] In an embodiment of the present application, the isolation component and the protective component are configured to be destroyed by emissions from the battery cell when the pressure relief mechanism is actuated, so that the emissions pass through the isolation component and the protective component. As a result, during the actuation of the pressure relief mechanism, the emissions discharged by the pressure relief mechanism can smoothly pass through the isolation component and the protective component and be discharged from the electrical cavity of the battery, thereby reducing the thermal impact on the battery cell and improving the performance of the battery.

[0017] In some implementations, the melting point of the protective component is greater than the melting point of the isolation component.

[0018] In an embodiment of the present application, by connecting the protective component to the surface of the isolation component facing away from the pressure relief mechanism and setting the melting point of the protective component to be greater than the melting point of the isolation component, the possibility of damage to the surface of the isolation component facing away from the pressure relief mechanism due to vibration, impact, high temperature, etc. can be reduced, thereby improving the performance of the battery.

[0019] In some implementations, the protective component is made of one of the following materials: polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, or polyethylene epoxy resin. Thus, in the embodiments of the present application, by setting the protective component to be made of one of the following materials: polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, or polyethylene epoxy resin, the insulating properties, heat resistance, and chemical stability of the protective component can be improved, thereby effectively reducing the possibility of damage to the surface of the isolation component facing away from the pressure relief mechanism under conditions such as vibration, impact, and high temperature, thereby improving the performance of the battery.

[0020] In some implementations, the isolation component is bonded to the first surface. Thus, in the embodiments of the present application, by bonding the adhesive component to the first surface, the sealing performance of the connection between the isolation component and the attachment component can be effectively improved, thereby reducing the impact of adhesive entering the first through hole on the actuation performance of the pressure relief mechanism, thereby improving the performance of the battery.

[0021] In some implementations, the isolation component is embedded in the first through hole, or the isolation component is adhered to the inner wall of the first through hole.

[0022] In an embodiment of the present application, by arranging the isolation component to be embedded in the first through hole, or the isolation component to be bonded to the inner wall of the first through hole, the influence of the adhesive entering the first through hole on the actuation performance of the pressure relief mechanism can be effectively reduced, thereby improving the performance of the battery.

[0023] In some implementations, the isolation component is provided with a first groove opening toward the battery cell, at least a portion of a side wall of the first groove is located within the first through hole, and an outer edge of the first groove is connected to the side wall and is provided between the first surface and the first wall.

[0024] In an embodiment of the present application, the isolation component 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 in the first through hole, and the outer edge of the first groove is connected to the side wall and is arranged between the first surface and the first wall. When the attachment component is configured to be attached to the first wall by an adhesive, the adhesive can be effectively prevented from being applied between the attachment component and the pressure relief mechanism, effectively reducing the impact of the adhesive entering the pressure relief mechanism on the actuation performance of the pressure relief mechanism, thereby improving the performance of the battery.

[0025] In some implementations, on a plane perpendicular to the thickness direction of the bottom wall of the first groove, the projection of the protective component covers the projection of the bottom wall of the first groove.

[0026] In an embodiment of the present application, on a plane perpendicular to the thickness direction of the bottom wall of the first groove, by covering the projection of the bottom wall of the first groove with the projection of the protective component, the possibility of damage to the surface of the isolation component facing away from the pressure relief mechanism under conditions such as vibration, impact, high temperature, etc. can be effectively reduced, thereby improving the performance of the battery.

[0027] In some implementations, a second groove opening toward the battery cell is provided on a surface of an outer edge of the first groove close to the first wall.

[0028] In an embodiment of the present application, a second groove with an opening toward the battery cell is provided on the surface of the first wall near the outer edge of the first groove. When the isolation component is attached to the first wall, a sealed cavity is formed between the isolation component and the first wall, thereby improving the sealing between the isolation component and the battery cell and reducing the risk of adhesive flowing from the gap between the isolation component and the first wall into the pressure relief mechanism, thereby reducing the impact on the actuation performance of the pressure relief mechanism and improving the performance of the battery.

[0029] In some implementations, the battery further includes a seal disposed between an outer edge of the first groove and the first wall, at least a portion of the seal being received in the second groove.

[0030] In an embodiment of the present application, by arranging a first seal between the outer edge of the first groove and the first wall, and at least partially accommodating the first seal in the second groove, the sealing between the isolation component and the battery cell can be further improved, and the risk of adhesive flowing from the gap between the isolation component and the first wall into the pressure relief mechanism can be effectively reduced, thereby reducing the impact on the actuation performance of the pressure relief mechanism, and further improving the performance of the battery.

[0031] In some implementations, a protrusion is provided on an outer edge of the first groove. The protrusion protrudes from the first surface and is provided around the pressure relief mechanism. The protrusion is used to prevent the adhesive from being applied between the attachment component and the pressure relief mechanism.

[0032] In an embodiment of the present application, a protrusion is provided on the outer edge of the first groove, and the protrusion protrudes from the first surface and is provided around the pressure relief mechanism. The protrusion is used to prevent the adhesive from being applied between the attachment component and the pressure relief mechanism, thereby reducing the risk of the adhesive flowing from the gap between the isolation component and the first wall into the pressure relief mechanism, thereby reducing the impact on the actuation performance of the pressure relief mechanism, and further improving the performance of the battery.

[0033] In some implementations, a bottom wall of the first groove is provided with a weakened area, and the weakened area is configured to be destroyed by the discharge from the battery cell when the pressure relief mechanism is actuated, so that the discharge passes through the weakened area.

[0034] In an embodiment of the present application, a weak area is provided on the bottom wall of the first groove, and the weak area is configured to be destroyed by the discharge when the pressure relief mechanism is actuated, that is, when the internal pressure or temperature of the battery cell reaches a threshold value, the discharge can pass through the weak area promptly and quickly to achieve rapid pressure relief of the battery cell, reduce the impact of the accumulation of the discharge in the first groove on the actuation performance of the pressure relief mechanism, and thereby improve the performance of the battery.

[0035] In some embodiments, the weak zone satisfies at least one of the following: the melting point of the material of the weak zone is lower than the melting point of the material of the rest of the bottom wall of the first groove; the thickness of the weak zone is lower than the thickness of the rest of the bottom wall of the first groove; the surface of the weak zone in the direction perpendicular to the thickness of the bottom wall of the first groove is provided with notches.

[0036] In an embodiment of the present application, the weak area is set to at least one of the following: the melting point of the material at the weak area is lower than the melting point of the material of the rest of the bottom wall of the first groove; the thickness of the weak area is lower than the thickness of the rest of the bottom wall of the first groove; the surface of the weak area in the thickness direction perpendicular to the bottom wall of the first groove is provided with notches, so that the weak area is more easily destroyed by the emissions of the battery cell than the rest of the bottom wall of the first groove, and when the internal pressure or temperature of the battery cell reaches a threshold value, the emissions can pass through the weak area in a timely and rapid manner to achieve rapid pressure relief of the battery cell, reduce the influence of the accumulation of the emissions in the first groove on the actuation performance of the pressure relief mechanism, and thus improve the performance of the battery.

[0037] In some implementations, the attachment member includes a first attachment member and a second attachment member connected to each other, with a hollow cavity formed between the first attachment member and the second attachment member.

[0038] In an embodiment of the present application, the attachment component is configured to include a first attachment component and a second attachment component that are connected to each other, and a hollow inner cavity is formed between the first attachment component and the second attachment component, so as to improve the structural strength and impact resistance of the battery, thereby improving the performance of the battery.

[0039] In some implementations, the hollow interior is used to contain a fluid to regulate the temperature of the battery cell.

[0040] In the embodiment of the present application, the hollow inner cavity formed between the first attachment component and the second attachment component is used to accommodate fluid to regulate the temperature of the battery cell, thereby reducing the risk of thermal runaway of the battery cell and improving the performance of the battery.

[0041] In a second aspect, an electric device is provided, comprising the battery described in any one of the implementations of the first aspect, wherein the battery is used to provide electric energy to the electric device.

[0042] In some implementations, the electrical device may be a vehicle, a ship, or a spacecraft.

[0043] In a third aspect, an energy storage device is provided, comprising the battery described in any one of the implementations of the first aspect, wherein the battery is used to store electrical energy for the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0045] FIG1 is a schematic structural diagram of a vehicle provided in one embodiment of the present application.

[0046] FIG2 is a schematic structural diagram of a battery provided in one embodiment of the present application.

[0047] FIG3 is a schematic structural diagram of a battery cell provided in one embodiment of the present application.

[0048] FIG4 is a schematic structural diagram of a battery provided in another embodiment of the present application.

[0049] FIG5 is a schematic cross-sectional view of a battery provided in accordance with an embodiment of the present application.

[0050] FIG6 is a partial cross-sectional schematic diagram of a battery provided in another embodiment of the present application.

[0051] FIG7 is a partial cross-sectional schematic diagram of a battery provided in another embodiment of the present application.

[0052] FIG8 is a partial cross-sectional schematic diagram of a battery provided in another embodiment of the present application.

[0053] FIG9 is a partial cross-sectional schematic diagram of a battery provided in another embodiment of the present application.

[0054] FIG10 is a schematic structural diagram of an isolation component provided in an embodiment of the present application.

[0055] FIG11 is a partial cross-sectional schematic diagram of a battery provided in another embodiment of the present application.

[0056] FIG12 is a partial cross-sectional schematic diagram of a battery provided in another embodiment of the present application.

[0057] FIG13 is a partial cross-sectional schematic diagram of a battery provided in another embodiment of the present application.

[0058] FIG14 is a schematic cross-sectional view of a battery provided in another embodiment of the present application.

[0059] FIG15 is a partial cross-sectional schematic diagram of a battery provided in another embodiment of the present application.

[0060] Explanation of the reference numerals: 1-vehicle; 10-battery; 20-battery cell; 30-controller; 40-motor; 11-casing; 21-housing; 22-electrode assembly; 211-shell; 212-cover; 213-pressure relief mechanism; 221a-first pole ear; 222a-second pole ear; 214-electrode terminal; 214a-positive electrode terminal; 214b-negative electrode terminal; 12-casing pressure relief valve; 13-attachment component; 14-isolating component; 15-protective component; 216-adhesive; 131-first surface; 132-first through hole; 133-second surface; 140-first groove; 141-side wall; 142-outer edge; 143-bottom wall; 144-protrusion; 150-second groove; 16-seal; 134-first attachment component; 135-second attachment component; 136-hollow inner cavity.

[0061] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0062] The following detailed description of the implementation of the present application is provided in conjunction with the accompanying drawings and embodiments. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application. That is, the present application is not limited to the described embodiments.

[0063] In the description of the embodiments of the present application, it should be noted that, unless otherwise specified, the meaning of "multiple" is more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but is within the allowable error range. "Parallel" is not parallel in the strict sense, but is within the allowable error range.

[0064] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the present application. In the description of the embodiments of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0065] The term "and / or" in the embodiments of the present application is merely a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in the embodiments of the present application generally indicates that the associated objects are in an "or" relationship.

[0066] Unless otherwise defined, all technical and scientific terms used in the embodiments of the present application have the same meaning as commonly understood by those skilled in the art in the technical field of the present application; the terms used in the specification of the application in the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the embodiments of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the embodiments of the present application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0067] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0068] The battery in the embodiments of this application refers to a physical module that includes one or more battery cells to provide electrical energy. For example, the battery referred to in this application may include a battery module or a battery pack. A battery generally includes a housing that encloses one or more battery cells. The housing can reduce the effects of liquids or other foreign matter on the charging or discharging of the battery cells.

[0069] It should be understood that the battery cells in the embodiments of the present application include but are not limited to lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0070] In some implementations, a battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator is placed between the positive and negative electrodes to prevent short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0071] In some implementations, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0072] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is provided on either or both of the two facing surfaces of the positive electrode current collector.

[0073] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum or stainless steel with a silver surface treatment, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0074] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. In some implementations, other traditional materials that can be used as positive electrode active materials for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium-containing phosphates may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4, also referred to as LFP), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon.

[0075] As an example, the positive active material may include at least one of a sodium transition metal oxide, a polyanion compound, and a Prussian blue-based compound.

[0076] In some implementations, the sodium transition metal oxide may be a sodium transition metal oxide that has been doped and modified, and the doping modification of the sodium transition metal oxide may include at least one of sodium site doping modification, oxygen site doping modification, transition metal site doping modification, and surface coating modification.

[0077] In some implementations, a metal foam may be used as the positive electrode. The metal foam may be nickel foam, copper foam, aluminum foam, alloy foam, or carbon foam, among others. When the metal foam is used as the positive electrode, the surface of the metal foam may or may not be provided with a positive electrode active material. For example, a lithium source material, potassium metal, or sodium metal may be filled and / or deposited within the metal foam, where the lithium source material is lithium metal and / or a lithium-rich material.

[0078] In some implementations, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0079] As an example, the negative electrode current collector may be a metal foil, a metal foam, or a composite current collector. For example, as the metal foil, aluminum or stainless steel treated with silver, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The metal foam may be nickel foam, copper foam, aluminum foam, alloy foam, or carbon foam, etc. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0080] In some implementations, the battery cell in the embodiments of the present application may be a negative electrode-free sodium secondary battery.

[0081] A negative electrode-free sodium secondary battery refers to a battery cell that does not actively set a negative electrode active material layer on the negative electrode side during the manufacturing process of the battery cell. For example, during the manufacturing process of the battery cell, a sodium metal or carbonaceous active material layer is not set at the negative electrode through processes such as coating or deposition to form a negative electrode active material layer. During the first charge, sodium ions gain electrons on the anode side and deposit on the surface of the current collector to form a sodium metal phase. During discharge, metallic sodium can be converted into sodium ions and return to the positive electrode, realizing cyclic charge and discharge. Compared with other sodium secondary batteries, negative electrode-free sodium secondary battery cells can achieve higher energy density due to the lack of a negative electrode active material layer.

[0082] In some implementations, in order to improve the performance of battery cells, some functional coatings, such as carbonaceous materials, metal oxides, alloys, etc., can be provided on the negative electrode side of the negative electrode-free sodium secondary battery to improve the conductivity of the negative electrode current collector and improve the uniformity of the deposited sodium metal.

[0083] In some implementations, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0084] In some implementations, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0085] In some implementations, the separator is a separator. The present invention has no particular restrictions on the type of separator, and any known separator with a porous structure having good chemical and mechanical stability can be used.

[0086] As an example, the main material of the isolation membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics.

[0087] In some implementations, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to both transport ions and isolate the positive and negative electrodes.

[0088] In some implementations, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The present application does not specifically limit the type of electrolyte, and the electrolyte can be selected based on needs. The electrolyte can be liquid, gel, or solid.

[0089] In some implementations, the electrode assembly may be a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0090] In some implementations, the electrode assembly is a laminated structure. As an example, multiple positive and negative electrodes may be provided, and the multiple positive and negative electrodes may be alternately stacked.

[0091] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.

[0092] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of stacked folded segments.

[0093] As an example, a plurality of separators may be provided, each of which is disposed between any adjacent positive electrode sheets or negative electrode sheets.

[0094] As an example, the separator may be provided continuously, and may be provided between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0095] In some implementations, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0096] In some implementations, the electrode assembly is provided with tabs that can conduct current from the electrode assembly. The tabs include a positive tab and a negative tab.

[0097] In some implementations, a battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film.

[0098] As an example, the battery cells may be cylindrical, prismatic, soft-pack or other shaped battery cells. Prismatic battery cells include square-shell, blade-shaped, and polygonal batteries. Polygonal batteries may be, for example, hexagonal batteries.

[0099] In order to meet different power requirements, the battery in the embodiment of the present application may include multiple battery cells, wherein the multiple battery cells can be connected in series, in parallel, or in hybrid connection, and hybrid connection refers to a mixture of series and parallel connection. In some implementations, multiple battery cells can first be connected in series, in parallel, or in hybrid connection to form a battery module, and multiple battery modules can then be connected in series, in parallel, or in hybrid connection to form a battery. In other words, multiple battery cells can directly form a battery, or they can first form a battery module, and the battery module can then form a battery. The battery is further provided in an electrical device to provide electrical energy to the electrical device.

[0100] In some implementations, the battery in the embodiments of the present application may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0101] In some implementations, the battery in the embodiments of the present application may be a battery pack, which includes a housing and battery cells, wherein the battery cells or battery modules are housed in the housing.

[0102] In some implementations, the box in the embodiments of the present application can be used as part of the chassis structure of a vehicle. For example, a portion of the box can become at least a portion of the vehicle's floor, or a portion of the box can become at least a portion of the vehicle's crossbeams and longitudinal beams.

[0103] With the increasing severity of environmental pollution, the new energy industry has attracted more and more attention. In the new energy industry, battery technology is an important factor related to its development. In the development of battery technology, in addition to improving the electrical performance of the battery, safety issues are also an issue that cannot be ignored. If the safety of the battery is not guaranteed, the battery cannot be used, which reduces the performance of the battery. At present, during the installation and manufacturing process of the battery, it is necessary to bond the battery cell to the box. If the adhesive overflows to the position of the pressure relief mechanism of the battery cell, it will affect the actuation performance of the pressure relief mechanism, thereby reducing the performance of the battery. Therefore, how to improve the performance of the battery has become a technical problem that needs to be solved urgently in this field.

[0104] In view of this, an embodiment of the present application provides a battery, comprising: a battery cell, a first wall of which is provided with a pressure relief mechanism; an attachment component, a first surface of which is attached to the first wall via an adhesive; an isolation component connected to the attachment component, the isolation component being configured to prevent the adhesive from being applied between the attachment component and the pressure relief mechanism; and a protective component connected to a surface of the isolation component facing away from the pressure relief mechanism to protect the isolation component. Thus, by connecting the protective component to the surface of the isolation component facing away from the pressure relief mechanism, the protective component can protect the isolation component, thereby reducing the possibility of damage to the surface of the isolation component facing away from the pressure relief mechanism due to vibration, impact, high temperature, etc., thereby improving the performance of the battery.

[0105] The technical solutions described in the embodiments of the present application are applicable to various battery-powered electrical devices. For example, the electrical devices may be vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may be fuel vehicles, gas vehicles, or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0106] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the electrical equipment described above, but can also be applied to all devices that use batteries. For the sake of simplicity, the following embodiments are described in detail using the electrical equipment as a vehicle as an example.

[0107] For example, as shown in FIG1 , it is a structural schematic diagram of a vehicle 1 provided in an embodiment of the present application. The vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 40, a controller 30 and a battery 10 may be provided inside the vehicle 1. The controller 30 is used to control the battery 10 to power the motor 40. For example, a battery 10 may be provided at the bottom, front or rear of the vehicle 1. The battery 10 may be used to power the vehicle 1. For example, the battery 10 may be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, and for example, the battery 10 may be used for the starting, navigation and operation of the vehicle 1 to meet the working power requirements. In some implementations of the present application, the battery 10 may not only be used as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0108] In order to meet different power usage requirements, the battery 10 in the embodiment of the present application may include at least one battery cell group, and the battery cell group includes a plurality of battery cells, wherein the plurality of battery cells can be electrically connected in series, in parallel, or in hybrid to form a battery 10, wherein hybrid refers to a mixture of series and parallel. The battery 10 may also be referred to as a battery pack. For example, a plurality of battery cells can first be connected in series, in parallel, or in hybrid to form a battery module, and a plurality of battery modules can then be connected in series, in parallel, or in hybrid to form a battery 10. In other words, a plurality of battery cells can directly form a battery 10, or they can first be formed into a battery module, and then the battery modules can be formed into a battery 10.

[0109] In some implementations, the battery 10 may include multiple battery cells 20. For example, FIG2 is a schematic structural diagram of a battery 10 according to one embodiment of the present application. The battery 10 may include multiple battery cells 20. The battery 10 may also include a housing 11 having a hollow interior and housing the multiple battery cells 20. For example, the multiple battery cells 20 may be connected in parallel, in series, or in a mixed combination and then placed in the housing 11.

[0110] In some implementations, the battery 10 may further include other structures, which will not be described in detail here. For example, the battery 10 may further include a busbar component, which is used to achieve electrical connection between multiple battery cells 20, such as parallel connection, series connection, or mixed connection. Specifically, the busbar component can achieve electrical connection between the battery cells 20 by connecting the electrode terminals of the battery cells 20. Furthermore, the busbar component can be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of the multiple battery cells 20 can be further led out through the box through a conductive mechanism. Optionally, the conductive mechanism may also belong to the busbar component.

[0111] In the embodiment of the present application, the number of battery cells 20 can be set to any value according to different power requirements. Multiple battery cells 20 can be connected in series, parallel or hybrid to achieve a larger capacity or power. Since the number of battery cells 20 included in each battery 10 may be large, for ease of installation, the battery cells 20 can be grouped, and each group of battery cells 20 constitutes a battery module. The number of battery cells 20 included in the battery module is not limited and can be set according to demand. The battery 10 may include multiple battery modules, which can be connected in series, parallel or hybrid.

[0112] As shown in FIG3 , it is a schematic structural diagram of a battery cell 20 according to an embodiment of the present application. The battery cell 20 includes one or more electrode assemblies 22, a shell 211 and a cover plate 212. The shell 211 and the cover plate 212 form an outer shell 21 or a battery box. The walls of the shell 211 and the cover plate 212 are both referred to as the walls of the battery cell 20. For a rectangular battery cell 20, the walls of the shell 211 include a bottom wall and four side walls. The shell 211 is determined according to the shape of the one or more electrode assemblies 22 after combination. For example, the shell 211 can be a hollow cuboid, a cube or a cylinder, and one of the faces of the shell 211 has an opening so that one or more electrode assemblies 22 can be placed in the shell 211. For example, when the shell 211 is a hollow cuboid or a cube, one of the planes of the shell 211 is an open surface, that is, the plane does not have a wall, so that the inside and outside of the shell 211 are connected. When the housing 211 is a hollow cylinder, the end surface of the housing 211 is an open surface, that is, the end surface has no wall, so that the inside and outside of the housing 211 are connected. The cover plate 212 covers the opening and is connected to the housing 211 to form a closed cavity for accommodating the electrode assembly 22. The housing 211 is filled with an electrolyte, such as an electrolyte solution.

[0113] The battery cell 20 may also include two electrode terminals 214, which may be disposed on the cover plate 212. The cover plate 212 is typically flat, with the two electrode terminals 214 secured to the flat surface of the cover plate 212. The two electrode terminals 214 are respectively a positive electrode terminal 214a and a negative electrode terminal 214b. Each electrode terminal 214 is provided with a corresponding connecting member, also known as a current collecting member, located between the cover plate 212 and the electrode assembly 22 to electrically connect the electrode assembly 22 to the electrode terminals 214.

[0114] As shown in FIG3 , each electrode assembly 22 has a first electrode tab 221 a and a second electrode tab 222 a. The polarities of the first electrode tab 221 a and the second electrode tab 222 a are opposite. For example, when the first electrode tab 221 a is a positive electrode tab, the second electrode tab 222 a is a negative electrode tab.

[0115] In the battery cell 20 , the electrode assembly 22 can be provided as a single one or multiple ones according to actual use requirements. As shown in FIG3 , two independent electrode assemblies 22 are provided in the battery cell 20 .

[0116] A pressure relief mechanism 213 may also be provided on the battery cell 20. The pressure relief mechanism 213 is used to be activated to release the internal pressure or temperature of the battery cell 20 when the internal pressure or temperature reaches a threshold value.

[0117] The pressure relief mechanism 213 may have various possible pressure relief structures. For example, the pressure relief mechanism 213 may be a temperature-sensitive pressure relief mechanism configured to melt when the internal temperature of the battery cell 20 equipped with the pressure relief mechanism 213 reaches a threshold; and / or the pressure relief mechanism 213 may be a pressure-sensitive pressure relief mechanism configured to rupture when the internal pressure of the battery cell 20 equipped with the pressure relief mechanism 213 reaches a threshold.

[0118] Figure 4 is a schematic structural diagram of a battery 10 provided in another embodiment of the present application. Figure 5 is a schematic cross-sectional diagram of a battery 10 provided in another embodiment of the present application. Figure 6 is a schematic partial cross-sectional diagram of a battery 10 provided in another embodiment of the present application. For example, Figure 5 may be a schematic cross-sectional diagram of the corresponding portion of the battery 10 in Figure 4, and Figure 6 may be an enlarged schematic cross-sectional diagram of the corresponding portion of the battery 10 in Figure 4 or Figure 5.

[0119] In some embodiments, as shown in Figures 4 to 6, the battery 10 includes a battery cell 20, an attachment part 13, an isolation part 14 and a protective part 15, the first wall 215 of the battery cell 20 is provided with a pressure relief mechanism 213, the first surface 131 of the attachment part 13 is attached to the first wall 215 by an adhesive 216, the isolation part 14 is connected to the attachment part 13, the isolation part 14 is configured to prevent the adhesive 216 from being applied between the attachment part 13 and the pressure relief mechanism 213, and the protective part 15 is connected to the surface of the isolation part 14 facing away from the pressure relief mechanism 213 to protect the isolation part 14.

[0120] It should be understood that the first wall 215 in the embodiment of the present application may be any wall of the battery cell 20. For example, the first wall 215 includes but is not limited to the following examples: the first wall 215 may be the wall with the smallest area of ​​the battery cell 20; the first wall 215 may also be the wall with the largest area of ​​the battery cell 20; the first wall 215 may be the wall of the battery cell 20 on which the electrode terminal 214 is provided; the first wall 215 may be the wall adjacent to the wall of the battery cell 20 on which the electrode terminal 214 is provided; the first wall may be the wall opposite to the wall of the battery cell 20 on which the electrode terminal 214 is provided.

[0121] It should also be understood that in the embodiment of the present application, the adhesive 216 used to bond the attachment component 13 to the first wall 215 includes but is not limited to polyurethane adhesive, acrylic adhesive, and silicone rubber adhesive.

[0122] It should also be understood that in the embodiment of the present application, the isolation component 14 and the attachment component 13 can be adhesively connected. For example, the isolation component 14 and the attachment component 13 can be connected by an adhesive 216.

[0123] It should also be understood that in the embodiment of the present application, the protective component 15 and the isolation component 14 can be adhesively connected. For example, the protective component 15 and the isolation component 14 can be connected by an adhesive 216.

[0124] It should also be understood that in the embodiment of the present application, as shown in Figure 5, a case pressure relief valve 12 is provided on the surface of the side wall of the case 11 of the battery 10 away from the interior of the case 11. The case pressure relief valve 12 is used to release the high-pressure and high-temperature gas generated during the pressure relief process when the pressure relief mechanism 213 of the battery cell 20 is actuated, so as to reduce the thermal impact on the battery cell 20 and improve the performance of the battery 10.

[0125] In an embodiment of the present application, by connecting the protective component 15 to the surface of the isolation component 14 facing away from the pressure relief mechanism 213, the protective component 15 can protect the isolation component 14, thereby reducing the possibility of damage to the surface of the isolation component 14 facing away from the pressure relief mechanism 213 when subjected to vibration, impact, high temperature, etc., thereby improving the performance of the battery 10.

[0126] In some implementations, as shown in FIG. 5 and FIG. 6 , the attachment component 13 is provided with a first through hole 132 corresponding to the position of the pressure relief mechanism 213 .

[0127] It should be understood that in the embodiment of the present application, the shape of the first through hole 132 in the direction perpendicular to the thickness of the attachment part 13 can be set according to actual needs. For example, the shape of the first through hole 132 can be set according to the shape of the pressure relief mechanism 213 of the battery cell 20. Exemplarily, the shape of the first through hole 132 includes but is not limited to a circle, an ellipse, a rectangle, and a regular polygon.

[0128] It should also be understood that in the embodiment of the present application, the first through hole 132 corresponding to the position of the pressure relief mechanism 213 is provided on the attachment part 13, which means that the orthographic projection of the first through hole 132 on the plane perpendicular to the thickness direction of the attachment part 13 can be greater than, less than or equal to the orthographic projection of the pressure relief mechanism 213 on the plane perpendicular to the thickness direction of the attachment part 13.

[0129] In the embodiment of the present application, by providing a first through hole 132 corresponding to the position of the pressure relief mechanism 213 on the attachment component 13, when the pressure relief mechanism 213 of the battery cell 20 is actuated, the exhaust discharged by the pressure relief mechanism 213 can be smoothly discharged from the electrical cavity through the first through hole 132, so as to reduce the thermal impact on the battery cell 20, thereby improving the performance of the battery 10.

[0130] In some implementations, as shown in FIG6 , the protective component 15 is located inside the first through hole 132. Thus, by connecting the protective component 15 to the surface of the isolation component 14 facing away from the pressure relief mechanism 213 and positioning the protective component 15 inside the first through hole 132, the isolation component 14 can be protected to reduce the possibility of damage to the surface of the isolation component 14 facing away from the pressure relief mechanism 213 due to vibration, impact, high temperature, etc., thereby improving the performance of the battery 10. Furthermore, the structural design is simple and easy to install and remove.

[0131] FIG7 shows a partial cross-sectional schematic diagram of a battery 10 provided in another embodiment of the present application.

[0132] In some implementations, as shown in FIG7 , the protective component 15 is bonded to the inner wall of the first through hole 132 to seal the first through hole 132. Thus, in the embodiment of the present application, by connecting the protective component 15 to the surface of the isolation component 14 facing away from the pressure relief mechanism 213 and bonding the protective component 15 to the inner wall of the first through hole 132 to seal the first through hole 132, the possibility of damage to the surface of the isolation component 14 facing away from the pressure relief mechanism 213 due to vibration, impact, high temperature, etc. can be effectively reduced, thereby improving the performance of the battery 10.

[0133] FIG8 shows a partial cross-sectional schematic diagram of a battery 10 provided in another embodiment of the present application.

[0134] In some implementations, as shown in FIG. 8 , the protective component 15 is connected to the second surface 133 of the attachment component 13 facing away from the pressure relief mechanism 213 to close the first through hole 132 .

[0135] In an embodiment of the present application, by connecting the protective component 15 to the surface of the isolation component 14 facing away from the pressure relief mechanism 213, and the protective component 15 is connected to the second surface 133 of the attachment component 13 facing away from the pressure relief mechanism 213, the sealing of the first through hole 132 can be improved, so as to effectively reduce the possibility of damage to the surface of the isolation component 14 facing away from the pressure relief mechanism 213 when subjected to vibration, impact, high temperature, etc., thereby improving the performance of the battery 10.

[0136] In some implementations, the isolation component 14 and the protective component 15 are configured to be destroyed by the discharge from the battery cell 20 when the pressure relief mechanism 213 is actuated, so that the discharge passes through the isolation component 14 and the protective component 15. Thus, in the embodiment of the present application, by configuring the isolation component 14 and the protective component 15 to be destroyed by the discharge from the battery cell 20 when the pressure relief mechanism 213 is actuated, so that the discharge passes through the isolation component 14 and the protective component 15, during the actuation of the pressure relief mechanism 213, the discharge discharged by the pressure relief mechanism 213 can smoothly pass through the isolation component 14 and the protective component 15 and be discharged from the electrical cavity of the battery 10, thereby reducing the thermal impact on the battery cell 20 and improving the performance of the battery 10.

[0137] In some implementations, the melting point of the protective component 15 is greater than the melting point of the isolation component 14. Thus, in the embodiment of the present application, by connecting the protective component 15 to the surface of the isolation component 14 facing away from the pressure relief mechanism 213 and setting the melting point of the protective component 15 to be greater than the melting point of the isolation component 14, the possibility of damage to the surface of the isolation component 14 facing away from the pressure relief mechanism 213 due to vibration, impact, high temperature, etc. can be reduced, thereby improving the performance of the battery 10.

[0138] In some implementations, the material of the protective component 15 includes at least one of the following materials: polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin. Thus, in the embodiment of the present application, by setting the material of the protective component 15 to be at least one of the following materials: polypropylene, polycarbonate, polyethylene terephthalate, mica, glass fiber, ceramic fiber, and polyethylene epoxy resin, the insulation performance, heat resistance, and chemical stability of the protective component 15 can be improved, thereby effectively reducing the possibility of damage to the surface of the isolation component 14 facing away from the pressure relief mechanism 213 under conditions such as vibration, impact, and high temperature, thereby improving the performance of the battery 10.

[0139] FIG9 shows a partial cross-sectional schematic diagram of a battery 10 provided in another embodiment of the present application.

[0140] In some implementations, as shown in FIG9 , the isolation component 14 is bonded to the first surface 131. Thus, in the embodiment of the present application, by bonding the isolation component 14 to the first surface 131, the sealing performance of the connection between the isolation component 14 and the attachment component 13 can be effectively improved, thereby reducing the impact of the adhesive 216 entering the first through hole 132 on the actuation performance of the pressure relief mechanism 213, thereby improving the performance of the battery 10.

[0141] FIG10 shows a schematic structural diagram of an isolation component 14 provided in an embodiment of the present application.

[0142] In some implementations, as shown in FIG. 8 to FIG. 10 , the isolation component 14 is embedded in the first through hole 132 , or the isolation component 14 is adhered to the inner wall of the first through hole 132 .

[0143] In the embodiment of the present application, by setting the isolation component 14 to be embedded in the first through hole 132, or the isolation component 14 is bonded to the inner wall of the first through hole 132, the influence of the adhesive 216 on the actuation performance of the pressure relief mechanism 213 due to entering the first through hole 132 can be effectively reduced, thereby improving the performance of the battery 10.

[0144] In some embodiments, as shown in Figures 6 to 10, the isolation component 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 within the first through hole 132, and the outer edge 142 of the first groove 140 is connected to the side wall 141 and is disposed between the first surface 131 and the first wall 215.

[0145] In an embodiment of the present application, the isolation component 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 in the first through hole 132, and the outer edge 142 of the first groove 140 is connected to the side wall 141 and is arranged between the first surface 131 and the first wall 215. When the attachment component 13 is configured to be attached to the first wall 215 by an adhesive 216, the adhesive 216 can be effectively prevented from being applied between the attachment component 13 and the pressure relief mechanism 213, effectively reducing the influence of the adhesive 216 entering the pressure relief mechanism 213 on the actuation performance of the pressure relief mechanism 213, thereby improving the performance of the battery 10.

[0146] In some implementations, in a plane perpendicular to the thickness direction of the bottom wall 143 of the first groove 140 , the projection of the protective component 15 covers the projection of the bottom wall 143 of the first groove 140 .

[0147] It should be understood that in the embodiment of the present application, the shape of the bottom wall 143 of the first groove 140 can be set according to actual needs. 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 relief 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 circle, an ellipse, a rectangle, and a regular polygon.

[0148] It should be understood that in the embodiment of the present application, the projection of the protective component 15 or the bottom wall 143 of the first groove 140 on a plane perpendicular to the thickness direction of the bottom wall 143 of the first groove 140 can be a positive projection in the thickness direction, or the projection of the protective component 15 or the bottom wall 143 of the first groove 140 on a plane perpendicular to the thickness direction of the bottom wall 143 of the first groove 140 can also be a projection in other directions.

[0149] In the embodiment of the present application, on a plane perpendicular to the thickness direction of the bottom wall 143 of the first groove 140, by covering the projection of the bottom wall 143 of the first groove 140 with the projection of the protective component 15, the possibility of damage to the surface of the isolation component 14 facing away from the pressure relief mechanism 213 when subjected to vibration, impact, high temperature, etc. can be effectively reduced, thereby improving the performance of the battery 10.

[0150] FIG11 shows a partial cross-sectional schematic diagram of a battery 10 provided in another embodiment of the present application.

[0151] In some implementations, as shown in FIG. 11 , a second groove 150 opening toward the battery cell 20 is provided on a surface of an outer edge 142 of the first groove 140 close to the first wall 215 .

[0152] It should be understood that in the embodiment of the present application, the shape of the bottom wall of the second groove 150 can be set according to actual needs. For example, the shape of the bottom wall of the second groove 150 includes but is not limited to a circle, an ellipse, a rectangle, and a regular polygon.

[0153] In an embodiment of the present application, a second groove 150 with an opening toward the battery cell 20 is provided on the surface of the outer edge 142 of the first groove 140 close to the first wall 215. When the isolation component 14 is attached to the first wall 215, a sealed cavity is formed between the isolation component 14 and the first wall 215, thereby improving the sealing between the isolation component 14 and the battery cell 20 and reducing the risk of the adhesive 216 flowing from the gap between the isolation component 14 and the first wall 215 into the pressure relief mechanism 213, thereby reducing the impact on the actuation performance of the pressure relief mechanism 213 and improving the performance of the battery 10.

[0154] FIG12 shows a partial cross-sectional schematic diagram of a battery 10 provided in another embodiment of the present application.

[0155] In some implementations, as shown in FIG. 12 , the battery 10 further includes a seal 16 disposed between the outer edge 142 of the first groove 140 and the first wall 215 , with at least a portion of the seal 16 being received in the second groove 150 .

[0156] It should be understood that in the embodiment of the present application, the shape of the sealing member 16 can be set according to actual needs. For example, 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 an annular shape, a circle, an ellipse, a square, and a regular polygon. For another example, in a cross section perpendicular to the height direction of the box body 11, if the shape of the second groove 150 is annular, the shape of the sealing member 16 in the embodiment of the present application can be an annular structure that matches the shape of the second groove 150.

[0157] It should also be understood that in the embodiment of the present application, the shape of the sealing member 16 includes but is not limited to rubber, polytetrafluoroethylene, polyethylene, polypropylene, and polyurethane.

[0158] In the embodiment of the present application, by arranging a seal 16 between the outer edge 142 of the first groove 140 and the first wall 215, and at least a portion of the seal 16 is accommodated in the second groove 150, the sealing between the isolation component 14 and the battery cell 20 can be further improved, and the risk of the adhesive 216 flowing from the gap between the isolation component 14 and the first wall 215 into the pressure relief mechanism 213 can be effectively reduced, thereby reducing the impact on the actuation performance of the pressure relief mechanism 213, and further improving the performance of the battery 10.

[0159] FIG13 shows a partial cross-sectional schematic diagram of a battery 10 provided in another embodiment of the present application.

[0160] In some implementations, as shown in FIG13 , the outer edge 142 of the first groove 140 is provided with a protrusion 144 , which protrudes from the first surface 131 and is provided around the pressure relief mechanism 213 , and the protrusion 144 is used to prevent the adhesive 216 from being applied between the attachment component 13 and the pressure relief mechanism 213 .

[0161] It should be understood that in the embodiment of the present application, the protrusion 144 protrudes from the first surface 131 and is arranged around the pressure relief mechanism 213, which means that the protrusion 144 can protrude toward the direction of the battery cell 20 or toward the first wall 215 of the battery cell 20 to reduce the risk of the adhesive between the attachment component 13 and the first wall 215 of the battery cell 20 flowing to the pressure relief mechanism 213 through the gap between the isolation component 14 and the first wall 215.

[0162] It should also be understood that in the embodiment of the present application, the shape of the protrusion 144 can be set according to actual needs to prevent the adhesive from flowing to the pressure relief mechanism 213 through the gap between the isolation component 14 and the first wall 215. For example, the shape of the protrusion 144 can be an annular structure protruding toward the first wall 215, and the annular structure is arranged around the pressure relief mechanism 213.

[0163] In the embodiment of the present application, a protrusion 144 is provided on the outer edge 142 of the first groove 140, and the protrusion 144 protrudes from the first surface 131 and is provided around the pressure relief mechanism 213. The protrusion 144 is used to prevent the adhesive 216 from being applied between the attachment component 13 and the pressure relief mechanism 213, thereby reducing the risk of the adhesive 216 flowing from the gap between the isolation component 14 and the first wall 215 into the pressure relief mechanism 213, thereby reducing the impact on the actuation performance of the pressure relief mechanism 213, and thereby improving the performance of the battery 10.

[0164] In some implementations, the bottom wall 143 of the first groove 140 is provided with a weak area, which is configured to be destroyed by the discharge from the battery cell 20 when the pressure relief mechanism 213 is actuated, so that the discharge passes through the weak area.

[0165] It should be understood that in the embodiment of the present application, at least a portion of the bottom wall 143 of the first groove 140 can be set as a weak area so that it can be destroyed by the discharge when the pressure relief mechanism 213 is actuated, so that the discharge passes through the weak area.

[0166] It should also be understood that in the embodiment of the present application, in the thickness direction perpendicular to the bottom wall 143 of the first groove 140, the shape of the weak area can be set according to actual needs. For example, the shape of the weak area can be set according to the shape of the pressure relief mechanism 213 of the battery cell 20. Exemplarily, the shape of the weak area includes but is not limited to a circle, an ellipse, a rectangle, and a regular polygon.

[0167] It should also be understood that the number of weak areas provided on the bottom wall 143 of the first groove 140 can be set according to actual needs. For example, the number of the weak areas can be one or more.

[0168] In the embodiment of the present application, a weak area is provided on the bottom wall 143 of the first groove 140, and the weak area is configured to be destroyed by the discharge when the pressure relief mechanism 213 is actuated, that is, when the internal pressure or temperature of the battery cell 20 reaches a threshold value, the discharge can pass through the weak area promptly and quickly to achieve rapid pressure relief of the battery cell 20, reduce the impact of the accumulation of the discharge in the first groove 140 on the actuation performance of the pressure relief mechanism 213, and thereby improve the performance of the battery 10.

[0169] In some implementations, the weak zone satisfies at least one of the following: the melting point of the material of the weak zone is lower than the melting point of the material of the rest of the bottom wall 143 of the first groove 140; the thickness of the weak zone is lower than the thickness of the rest of the bottom wall 143 of the first groove 140; and the surface of the weak zone in the direction perpendicular to the thickness of the bottom wall 143 of the first groove 140 is provided with notches.

[0170] It should be understood that in the embodiment of the present application, the melting point of the material at the weak zone can be set to be less than or equal to a preset threshold value, so that when the pressure relief mechanism 213 is actuated, the weak zone is more easily melted by the discharge discharged through the pressure relief mechanism 213 than the rest of the bottom wall 143 of the first groove 140. Secondly, the thickness of the weak zone can also be set to be less than the thickness of the rest of the bottom wall 143 of the first groove 140. Because the weak zone is thinner than the rest of the bottom wall 143 of the first groove 140, when the pressure relief mechanism 213 is actuated, the weak zone is more easily destroyed by the discharge discharged through the pressure relief mechanism 213 than the rest of the bottom wall 143 of the first groove 140.

[0171] It should also be understood that in the embodiment of the present application, the shape of the notch provided on the surface of the weak zone perpendicular to the thickness direction of the bottom wall 143 of the first groove 140 can be set according to actual needs. For example, the notch includes but is not limited to a cross notch, a rice notch, and an I-shaped notch.

[0172] In the embodiment of the present application, the weak area is set to at least one of the following: the melting point of the material at the weak area is lower than the melting point of the material of the rest of the bottom wall 143 of the first groove 140; the thickness of the weak area is less than the thickness of the rest of the bottom wall 143 of the first groove 140; the surface of the weak area perpendicular to the thickness direction of the bottom wall 143 of the first groove 140 is provided with a notch, so that the weak area is more easily destroyed by the discharge of the battery cell 20 than the rest of the bottom wall 143 of the first groove 140. When the internal pressure or temperature of the battery cell 20 reaches a threshold value, the discharge can pass through the weak area in a timely and rapid manner to achieve rapid pressure relief of the battery cell 20, reduce the influence of the accumulation of the discharge in the first groove 140 on the actuation performance of the pressure relief mechanism 213, and thereby improve the performance of the battery 10.

[0173] Figure 14 shows a schematic cross-sectional view of a battery 10 according to another embodiment of the present application. Figure 15 shows a partial cross-sectional view of a battery 10 according to another embodiment of the present application. For example, Figure 15 may be an enlarged cross-sectional view of a corresponding portion of the battery 10 shown in Figure 14 .

[0174] In some implementations, the attachment member 13 includes a first attachment member 134 and a second attachment member 135 connected to each other, with a hollow cavity 136 formed between the first attachment member 134 and the second attachment member 135 .

[0175] It should be understood that in the embodiment of the present application, the average distance between the first attachment member 134 and the second attachment member 135 can be set according to actual needs to meet the structural strength of the battery 10. It should also be understood that in the embodiment of the present application, the battery 10 also includes multiple other attachment members, such as a third attachment member. The third attachment member can be arranged on a side of the second attachment member 135 away from the pressure relief mechanism 213 of the battery 10, or the third attachment member can be arranged between the first attachment member 134 and the second attachment member 135.

[0176] In the embodiment of the present application, the attachment component 13 is configured to include a first attachment component 134 and a second attachment component 135 that are connected to each other, and a hollow inner cavity 136 is formed between the first attachment component 134 and the second attachment component 135, so as to improve the structural strength and impact resistance of the battery 10, thereby improving the performance of the battery 10.

[0177] In some implementations, the hollow inner cavity 136 is used to accommodate a fluid to regulate the temperature of the battery cell 20. Thus, in the embodiment of the present application, by using the hollow inner cavity 136 formed between the first attachment member 134 and the second attachment member 135 to accommodate a fluid to regulate the temperature of the battery cell 20, the risk of thermal runaway of the battery cell 20 can be reduced, thereby improving the performance of the battery 10.

[0178] Referring again to Figures 4 to 6, 10, 14 and 15 above, a battery 10 is provided, including a battery cell 20, an attachment part 13, an isolation part 14 and a protective part 15, the first wall 215 of the battery cell 20 is provided with a pressure relief mechanism 213, the first surface 131 of the attachment part 13 is attached to the first wall 215 by an adhesive 216, the isolation part 14 is connected to the attachment part 13, the isolation part 14 is configured to prevent the adhesive 216 from being applied between the attachment part 13 and the pressure relief mechanism 213, the protective part 15 is connected to the surface of the isolation part 14 facing away from the pressure relief mechanism 213 to protect the isolation part 14, and the attachment part 13 is provided with a first through hole 132 corresponding to the position of the pressure relief mechanism 213. The protective member 15 is located within the first through-hole 132. The isolation member 14 is provided with a first groove 140 opening toward the battery cell 20. At least a portion of the sidewall 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 sidewall 141 and disposed 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 overlaps the projection of the bottom wall 143 of the first groove 140. The attachment member 13 includes a first attachment member 134 and a second attachment member 135 connected to each other. A hollow inner chamber 136 is formed between the first attachment member 134 and the second attachment member 135. The hollow inner chamber 136 is used to accommodate a fluid to regulate the temperature of the battery cell 20.

[0179] The present application also provides an electrical device including the battery 10 of any of the above embodiments, wherein the battery 10 is used to provide power to the electrical device. Specifically, the electrical device may be the vehicle 1 shown in FIG1 , or any electrical device using the battery 10 .

[0180] An embodiment of the present application further provides an energy storage device, comprising the battery 10 in any of the above embodiments, wherein the battery 10 is used to store electrical energy for the energy storage device.

[0181] Although the present application has been described with reference to the above-described embodiments, various modifications may be made thereto and components may be replaced with equivalents without departing from the scope of the embodiments of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims.

Claims

1. A battery, characterized in that: include: A battery cell (20), wherein a first wall (215) of the battery cell (20) is provided with a pressure relief mechanism (213); an attachment member (13), wherein a first surface (131) of the attachment member (13) is attached to the first wall (215) by an adhesive (216); an isolation component (14), the isolation component (14) being connected to the attachment component (13), the isolation component (14) being configured to prevent the adhesive (216) from being applied between the attachment component (13) and the pressure relief mechanism (213); a protective component (15) connected to a surface of the isolation component (14) facing away from the pressure relief mechanism (213) to protect the isolation component (14); Wherein, the attachment component (13) is provided with a first through hole (132) corresponding to the position of the pressure relief mechanism (213).

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

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

4. The battery according to any one of claims 1 to 3, characterized in that The protection component (15) is connected to a second surface (133) of the attachment component (13) facing away from the pressure relief mechanism to close the first through hole (132).

5. The battery according to any one of claims 1 to 4, characterized in that The isolation component (14) and the protection component (15) are configured to be destroyed by the exhaust from the battery cell (20) when the pressure relief mechanism (213) is actuated, so that the exhaust passes through the isolation component (14) and the protection component (15).

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

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

8. The battery according to any one of claims 1 to 7, characterized in that The isolation component (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 component (14) is embedded in the first through hole (132), or the isolation component (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 component (14) is provided with a first groove (140) opening toward the battery cell (20); at least a portion of a side wall (141) of the first groove (140) is located in the first through hole (132); an outer edge (142) of the first groove (140) is connected to the side wall (141) and is arranged between the first surface (131) and the first wall (215).

11. The battery according to claim 10, characterized in that On a plane perpendicular to the thickness direction of the bottom wall (143) of the first groove (140), the projection of the protective component (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 a surface of the outer edge (142) of the first groove (140) close to the first wall (215).

13. The battery according to claim 12, characterized in that The battery further includes a seal (16) disposed between an outer edge (142) of the first groove (140) and the first wall (215), and at least a portion of the seal (16) is received in the second groove (150).

14. The battery according to any one of claims 10 to 13, characterized in that The outer edge (142) of the first groove (140) is provided with a protrusion (144), which protrudes from the first surface (131) and is arranged around the pressure relief mechanism (213), and the protrusion (144) is used to prevent the adhesive (216) from being applied between the attachment component (13) and the pressure relief mechanism (213).

15. The battery according to any one of claims 10 to 14, characterized in that A bottom wall (143) of the first groove (140) is provided with a weak area, and the weak area is configured to be destroyed by the discharge from the battery cell when the pressure relief mechanism (213) is actuated, so that the discharge passes through the weak area.

16. The battery according to claim 15, characterized in that The weak area satisfies at least one of the following: The melting point of the material of the weak zone is lower than the melting point of the material of the remaining portion of the bottom wall (143) of the first groove (140); The thickness of the weak area is smaller than the thickness of the rest of the bottom wall (143) of the first groove (140); A notch is provided on a surface of the weak zone in a thickness direction perpendicular to the bottom wall (143) of the first groove (140).

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

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

19. An electrical equipment, characterized in that: include: The battery according to any one of claims 1 to 18, wherein the battery is used to provide electrical energy to the electrical device.

20. An energy storage device, characterized in that: include: The battery according to any one of claims 1 to 18, wherein the battery is used to store electrical energy for the energy storage device.

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