Battery and electric apparatus

Abstract

A battery and an electric apparatus. The battery comprises a case, battery cells, an isolation component, and an insulating portion. The battery cells are arranged in the case, each battery cell is provided with a pressure relief portion, and the pressure relief portion is used for discharging the internal pressure of the battery cell. The isolation portion is arranged in the case; in a first direction, the isolation portion and the pressure relief portion are arranged on a same side; the isolation portion and the wall portion of the case jointly form a fume channel; the fume channel is located on the side of the isolation portion facing away from the battery cell; the isolation portion is provided with a first through hole communicated with the fume channel; and the through hole is arranged corresponding to the pressure relief portion to guide the discharge of the battery cell to enter the fume channel. At least part of the insulating portion covers the hole wall of the first through hole. The reliability of a battery can be effectively improved.

Description

Batteries and electrical devices CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese patent application No. 202420577713.3, filed on March 25, 2024, entitled “Battery and Electrical Device,” and the entire contents of the above application are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0003] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0004] In the development of battery technology, how to improve battery reliability is a technical problem that needs to be solved urgently. Summary of the Invention

[0005] The present application provides a battery and an electrical device. The technical solution provided in the present application can effectively improve the reliability of the battery.

[0006] In a first aspect, the present application provides a battery, which includes a case, a battery cell, an isolation component, and an insulating portion. The battery cell is arranged inside the case, and the battery cell has a pressure relief portion, which is used to release the internal pressure of the battery cell. The isolation component is arranged inside the case, and along a first direction, the isolation component and the pressure relief portion are arranged on the same side, and the isolation component and the wall of the case together form a flue, and the flue is located on the side of the isolation component away from the battery cell. The isolation component has a first through hole connected to the flue, and the through hole is arranged corresponding to the pressure relief portion, and is used to guide the emissions of the battery cell into the flue. At least part of the insulating portion covers the hole wall of the first through hole.

[0007] In the above solution, by covering the hole wall of the first through hole with an insulating part, the risk of internal short circuit of the battery caused by the overlap of the pressure relief structure and the hole wall of the first through hole due to the activation of the pressure relief part can be reduced, so that the battery has higher reliability.

[0008] According to some embodiments of the present application, the isolation component has a first surface and a second surface facing each other along a first direction, with the first surface facing the battery cell. The insulating portion includes a first connecting portion, a body, and a second connecting portion sequentially connected along the first direction. The body covers the hole wall of the through hole and surrounds the second through hole to form the first connecting portion. The first connecting portion is disposed on the first surface, and the second connecting portion is disposed on the second surface.

[0009] In the above scheme, by providing the first connecting part, the main body and the second connecting part that are interconnected, on the one hand, the risk of overlap between the pressure relief structure and the isolation component can be effectively reduced; on the other hand, a stable connection relationship is established between the insulating part and the isolation component, so that the battery has higher reliability.

[0010] According to some embodiments of the present application, the first connecting portion is annular and is disposed around the second through hole.

[0011] In the above solution, by arranging the first connecting portion to be arranged around the second through hole, on the one hand, the connection area between the insulating portion and the first surface can be increased, so that the insulating portion and the isolation component have a stable connection relationship. On the other hand, high-temperature and high-pressure emissions can smoothly pass through the second through hole into the flue, so that the battery cells and emissions are isolated from each other, reducing the risk of thermal runaway of the battery and improving the reliability of the battery.

[0012] According to some embodiments of the present application, an adhesive layer is provided between the battery cell and the isolation component, connecting the battery cell and the isolation component. A spacer is also provided between the battery cell and the isolation component. The spacer is disposed around the pressure relief portion to isolate the pressure relief portion from the adhesive layer, with a portion of the first connecting portion sandwiched between the spacer and the first surface.

[0013] In some embodiments of the above scheme, the battery cell is connected to the isolation component by bonding. The isolation component separates the pressure relief portion from the adhesive layer, reducing interference from the adhesive layer on the pressure relief portion and ensuring smooth pressure relief. To this end, by sandwiching a portion of the first connecting portion between the isolation component and the first surface, the internal structure of the battery can be rationally utilized, maintaining a stable insulating state of the insulating portion, thereby effectively improving the insulating portion's ability to insulate and isolate the pressure relief structure from the isolation component, thereby improving battery reliability.

[0014] According to some embodiments of the present application, the second connecting portion is annular and is disposed around the second through hole.

[0015] In the above solution, by arranging the second connecting portion to be arranged around the second through hole, on the one hand, the connection area between the insulating portion and the second surface can be increased, so that the insulating portion and the isolation component have a stable connection relationship. On the other hand, high-temperature and high-pressure emissions can smoothly pass through the second through hole into the flue to isolate the emissions and the battery cell, reduce the risk of thermal runaway of the battery, and improve the reliability of the battery.

[0016] According to some embodiments of the present application, a notch is provided between the second connecting portion and the body, the notch is arranged facing the hole wall of the first through hole, and the second connecting portion is bent along the notch and arranged on the second surface.

[0017] In the above solution, by providing a notch between the second connecting portion and the body, the second connecting portion can be efficiently bent along the notch and arranged on the second surface, thereby improving the efficiency of assembling the insulating portion to the isolation component and further improving the manufacturing efficiency of the battery.

[0018] According to some embodiments of the present application, the second connecting portion and the main body are separate structures.

[0019] In the above solution, by setting the second connecting part and the main body as independent split structures, the difficulty of assembling the insulating part on the isolation component can be reduced (for example, along the first direction, the main body is passed through the first through hole, and then the second connecting part is connected to the main body), thereby improving the manufacturing efficiency of the battery.

[0020] According to some embodiments of the present application, the second connecting portion is plate-shaped, and the second connecting portion has a weak part and a flange surrounding the weak part. The flange is connected to the main body and is arranged on the second surface. The weak part closes the second through hole, and the structural strength of the weak part is less than the structural strength of the flange.

[0021] In the above solution, on the one hand, by setting the second connecting part to be plate-shaped, the difficulty of connecting the second connecting part to the main body can be reduced, and the efficiency of assembling the insulating part can be improved. On the other hand, by setting a weak part with lower structural strength, the emissions can smoothly break through the weak part to enter the flue, thereby effectively isolating the battery cell and the emissions from each other, so that the battery has higher reliability.

[0022] According to some embodiments of the present application, the thickness of the weak member is smaller than the thickness of the flange.

[0023] In the above solution, by setting the thickness of the weak part to be smaller than the thickness of the flange, the emissions can smoothly break through the weak part and enter the flue, thereby effectively isolating the battery cell and the emissions from each other, making the battery more reliable.

[0024] According to some embodiments of the present application, the body includes a first portion and a second portion, which together cover the wall of the first through-hole. The first portion and the first connecting portion are interconnected to form a first insulating member, and the second portion and the second connecting portion are interconnected to form a second insulating member. The first insulating member and the second insulating member are interconnected by the first and second portions to be assembled to the isolation component.

[0025] In the above solution, by setting the insulating part as a first insulating member and a second insulating member that are independent of each other, and the first insulating member and the second insulating member are connected through the first part and the second part, the difficulty of assembling the insulating part to the isolation component can be effectively reduced, thereby improving the manufacturing efficiency of the battery.

[0026] According to some embodiments of the present application, a card groove is formed on the surface of the first part facing the hole wall of the first through hole, and the second part is sleeved on the first part, and the second part is protruded with a card block, which is arranged in the card groove.

[0027] In the above solution, by providing mutually cooperating card slots and card blocks, the assembly effect of the first insulating member and the second insulating member can be improved, and a stable connection relationship can be established between the first insulating member and the second insulating member.

[0028] According to some embodiments of the present application, the insulating portion is a high-temperature resistant insulating portion.

[0029] In the above solution, by setting the insulating part as a high-temperature resistant insulating part, the insulating part can withstand higher temperatures, reducing the risk of damage to the insulating part caused by high-temperature and high-pressure emissions, which may lead to insulation failure of the insulating part, and making the battery more reliable.

[0030] According to some embodiments of the present application, the insulating part is made of a material including mica, ceramic, or quartz.

[0031] According to some embodiments of the present application, the isolation component includes a thermal management component, and the thermal management component is used to adjust the temperature of the battery cell.

[0032] In the above solution, by setting the isolation component as a thermal management component, the isolation component can not only form a flue for exhaust of emissions, but also has the function of regulating the temperature of the battery cell, making the internal structure of the battery compact, which is conducive to improving the battery energy density.

[0033] In a second aspect, the present application further provides an electrical device comprising a battery according to any embodiment of the first aspect, the battery being used to provide electrical energy.

[0034] The above description is only an overview of the technical solutions of the embodiments of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0036] FIG1 is a schematic diagram of a vehicle in some embodiments of the present application;

[0037] FIG2 is an exploded perspective view of a battery in some embodiments of the present application;

[0038] FIG3 is a schematic diagram of the internal structure of a local battery in some embodiments of the present application;

[0039] FIG4 is a schematic diagram of an isolation component and an insulating portion in some embodiments of the present application;

[0040] FIG5 is a schematic diagram of a battery cell, an isolation component, and an insulating portion in some embodiments of the present application;

[0041] FIG6 is a partial schematic diagram of an isolation component and an insulating portion in some embodiments of the present application;

[0042] FIG7 is a schematic diagram of an isolation component and an insulating portion in some other embodiments of the present application;

[0043] FIG8 is a partial schematic diagram of an isolation component and an insulating portion in some other embodiments of the present application;

[0044] FIG9 is a schematic diagram of an isolation component and an insulating portion in some other embodiments of the present application;

[0045] FIG10 is a partial schematic diagram of isolation components and insulating parts in other embodiments of the present application.

[0046] Icon: 100-battery; 10-housing; 11-upper housing; 12-lower housing; 20-battery cell; 21-pressure relief part; 30-isolating component; 31-flue; 32-first through hole; 33-first surface; 34-second surface; 40-insulating part; 41-first connecting part; 42-main body; 420-second through hole; 421-first part; 4210-slot; 422-second part; 4220-block; 43-second connecting part; 430-notch; 431-weak part; 432-flange; 44-first insulating part; 45-second insulating part; 50-adhesive layer; 60-isolating part; 1000-vehicle; 200-controller; 300-motor; z-first direction. DETAILED DESCRIPTION

[0047] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0048] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0049] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0051] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0052] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0053] The term "plurality" used in this application refers to two or more (including two).

[0054] In this application, battery cells may include lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells, or magnesium-ion battery cells, and the embodiments of this application are not limited thereto. Battery cells may be cylindrical, flat, rectangular, or in other shapes, and the embodiments of this application are not limited thereto.

[0055] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. A battery generally includes a housing that encloses one or more battery cells. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0056] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet comprises a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive electrode collector. The portion of the positive electrode collector not coated with the positive active material layer protrudes from the portion coated with the positive active material layer. The portion of the positive electrode collector not coated with the positive active material layer serves as the positive electrode tab. For lithium-ion batteries, for example, the positive electrode current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The negative electrode sheet comprises a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative electrode collector. The portion of the negative electrode collector not coated with the negative active material layer protrudes from the portion coated with the negative active material layer. The portion of the negative electrode collector not coated with the negative active material layer serves as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative active material can be carbon or silicon, among others. To ensure high current flow without melting, multiple positive tabs are stacked together, and multiple negative tabs are stacked together. The separator can be made of materials such as PP (polypropylene) or PE (polyethylene). Furthermore, the electrode assembly can be a wound or laminated structure, but the present invention is not limited thereto.

[0057] To ensure the safety of a battery cell, a pressure relief device is typically installed on the outer shell of the battery cell. When the internal pressure or temperature of the battery cell reaches a threshold, the pressure relief structure of the pressure relief device flips, creating an opening in the outer shell of the battery cell, connecting the outside world with the inside of the outer shell. This allows the discharge of the internal substances (liquid, gas) of the battery cell to relieve the pressure inside the battery cell, thereby improving the reliability of the battery cell. For example, the pressure relief device is an explosion-proof valve installed on the outer shell. When the internal pressure or temperature of the battery cell reaches a threshold, the explosion-proof disc flips, connecting the outside world with the inside of the outer shell.

[0058] Currently, market developments indicate that batteries are becoming increasingly widely used. Batteries are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As battery applications continue to expand, market demand is also growing. The development of battery technology requires consideration of multiple design factors, including performance parameters such as battery life, energy density, discharge capacity, and charge / discharge rate. Furthermore, battery reliability is crucial.

[0059] At present, some batteries include a case, an isolation component, and a battery cell. The battery cell is located on one side of the isolation component, and a flue is formed between the other side of the isolation component and the case. The isolation component has a through hole provided corresponding to the pressure relief portion of the battery cell. The function of the flue includes that when the pressure relief portion is actuated to discharge the high-temperature and high-pressure substances inside the battery cell, the high-temperature and high-pressure emissions can enter the flue through the through hole to be isolated from the remaining battery cells in the battery case, thereby reducing the impact of the emissions on the remaining battery cells, making the battery have higher reliability. However, when the pressure relief portion is actuated and the pressure relief structure flips over to release the internal pressure of the battery cell, there is a risk that the pressure relief structure will overlap with the hole wall of the through hole, causing the battery insulation to fail, affecting the reliability of the battery.

[0060] In view of this, in order to improve the problem of battery insulation failure caused by the overlap between the pressure relief structure and the hole wall of the through hole and to improve the reliability of the battery, some embodiments of the present application provide a battery, which includes a case, a battery cell, an isolation component and an insulating part. The battery cell is arranged inside the case, and the battery cell has a pressure relief part, which is used to release the internal pressure of the battery cell. The isolation component is arranged inside the case, and along the first direction, the isolation component and the pressure relief part are arranged on the same side, and the isolation component and the wall of the case together form a flue, which is located on the side of the isolation component away from the battery cell. The isolation component has a first through hole connected to the flue, and the through hole is arranged corresponding to the pressure relief part, which is used to guide the discharge of the battery cell into the flue. At least part of the insulating part covers the hole wall of the first through hole.

[0061] In the above solution, by covering the hole wall of the first through hole with an insulating part, the risk of internal short circuit of the battery caused by the overlap of the pressure relief structure and the hole wall of the first through hole due to the activation of the pressure relief part can be reduced, so that the battery has higher reliability.

[0062] The technical solutions described in the embodiments of the present application are applicable to batteries and electrical devices using batteries.

[0063] Electrical devices may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, among others. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, among others; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, among others; and electric tools include metal cutting power 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, among others. The embodiments of the present application do not impose any particular restrictions on the above-mentioned electrical devices.

[0064] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device.

[0065] Please refer to Figure 1, which is a schematic diagram of a vehicle in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0066] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0067] According to some embodiments of the present application, a battery 100 is provided. Please refer to Figures 2 and 3. Figure 2 is a three-dimensional exploded view of the battery 100 in some embodiments of the present application, and Figure 3 is an internal schematic diagram of the local structure of the battery 100 in some embodiments of the present application.

[0068] The battery 100 includes a housing 10, battery cells 20, an isolation component 30, and an insulating portion 40. The battery cells 20 are disposed within the housing 10 and have pressure relief portions 21 for discharging internal pressure within the battery cells 20. The isolation component 30 is disposed within the housing 10, and along a first direction z, the isolation component 30 and the pressure relief portion 21 are disposed on the same side. The isolation component 30 and the wall of the housing 10 together form a flue 31, which is located on the side of the isolation component 30 facing away from the battery cells 20. The isolation component 30 has a first through hole 32 connected to the flue 31, which is disposed corresponding to the pressure relief portion 21 and is used to guide emissions from the battery cells 20 into the flue 31. At least a portion of the insulating portion 40 covers the wall of the first through hole 32.

[0069] In some embodiments, the housing 10 is used to provide a storage space for the battery cells 20. The housing 10 can adopt various structures. In some embodiments, the housing 10 can include an upper housing 11 and a lower housing 12. The upper housing 11 and the lower housing 12 cover each other, and the upper housing 11 and the lower housing 12 together define a storage space for accommodating the battery cells 20. The lower housing 12 can be a hollow structure with one end open, and the upper housing 11 can be a plate-like structure. The upper housing 11 covers the open side of the lower housing 12, so that the upper housing 11 and the lower housing 12 together define a storage space. The upper housing 11 and the lower housing 12 can also be hollow structures with one end open, and the open side of the upper housing 11 covers the open side of the lower housing 12. Of course, the housing 10 formed by the upper housing 11 and the lower housing 12 can have various shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0070] In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery 100 may be housed within the housing 10. Of course, the battery 100 may also be in the form of a battery module 100, in which multiple battery cells 20 are first connected in series, in parallel, or in a hybrid connection, and then the multiple battery modules 100 are further connected in series, in parallel, or in a hybrid connection to form an entire battery 100, and then housed within the housing 10. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for electrically connecting the multiple battery cells 20.

[0071] Each battery cell 20 may be a secondary battery cell or a primary battery cell 20 ; it may also be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0072] The pressure relief portion 21 is a component for releasing the internal pressure of the battery cell 20. The pressure relief portion 21 can be located on the surface of the battery cell 20 facing the isolation component 30. When the internal pressure or temperature of the battery cell 20 reaches a threshold value, the pressure relief structure of the pressure relief portion 21 flips outward to form an opening on the outer shell of the battery cell 20, thereby discharging the high-temperature and high-pressure substances inside the battery cell 20. In some embodiments, the pressure relief portion 21 can be an explosion-proof valve, and the pressure relief structure can be an explosion-proof plate that flips outward under pressure. In other embodiments, the pressure relief portion 21 can be a notch provided on the outer shell of the battery cell 20. Under the action of the internal pressure of the battery cell 20, the portion of the outer shell corresponding to the notch deforms and flips outward to form an opening, thereby releasing the internal pressure. The portion that deforms and flips outward can be a pressure relief structure.

[0073] The discharge of the battery cell 20 may be substances discharged from the interior of the battery cell 20 when the pressure relief portion 21 is actuated.

[0074] The isolation component 30 is a structural member disposed within the housing 10. In some embodiments, the first direction z can be the arrangement direction of the battery cells 20 and the isolation component 30, the first direction z can be the direction of gravity, or the height direction of the housing 10. For example, the isolation component 30 divides the interior of the housing 10 into two spaces, which are arranged along the first direction z. One space houses the battery cells 20, and the other forms a flue 31. The isolation component 30 is formed with a first through-hole 32 that connects the two spaces and corresponds to the pressure relief portion 21 of the battery cells 20. Exemplarily, the isolation component 30 is disposed within the lower housing 12, supporting the battery cells 20. The flue 31 is formed between the isolation component 30 and the bottom wall of the lower housing 12. When the pressure relief portion 21 of the battery cells 20 is actuated, the pressure relief structure flips toward the first through-hole 32, and the discharged high-temperature, high-pressure material is discharged into the flue 31 through the corresponding through-hole in the isolation component 30. In some embodiments, the box body 10 may be provided with a material discharge portion, which is in communication with the flue 31 and is used to discharge high-temperature and high-pressure materials in the flue 31 .

[0075] In some embodiments, the isolation component 30 may be a thermal management component, such as a water-cooling plate, with the first through-hole 32 disposed away from the flow channel within the water-cooling plate. In other embodiments, the isolation component 30 may be a separate structural member used to form a flue 31 within the housing 10.

[0076] The insulating portion 40 is a component with insulating properties. "At least a portion of the insulating portion 40 covers the wall of the first through hole 32" can be understood as the insulating portion 40 covering the wall of the first through hole 32, capable of insulating and isolating the flipped pressure relief structure from the wall of the first through hole 32. In some embodiments, the entire insulating portion 40 can cover the wall of the first through hole 32. In other embodiments, a portion of the insulating portion 40 can cover the wall of the first through hole 32, and the remaining insulating portion 40 is provided in other parts of the isolation component 30. Exemplarily, the insulating portion 40 includes two parts, one of which covers the wall of the first through hole 32, and the other part is provided on the surface of the isolation component 30 facing or facing away from the battery cell 20. In another exemplary embodiment, the insulating portion 40 includes three parts, one of which covers the wall of the first through hole 32, another part is provided on the surface of the isolation component 30 facing the battery cell 20, and the remaining part is provided on the surface of the isolation component 30 facing away from the battery cell 20.

[0077] In the above solution, by covering the hole wall of the first through hole 32 with an insulating part 40, the risk of internal short circuit of the battery 100 caused by the overlap of the pressure relief structure and the hole wall of the first through hole 32 due to the actuation of the pressure relief part 21 can be reduced, so that the battery 100 has higher reliability.

[0078] According to some embodiments of the present application, please refer to Figure 4, which is a schematic diagram of the isolation component 30 and the insulating portion 40 in some embodiments of the present application. Along the first direction z, the isolation component 30 has a first surface 33 and a second surface 34 that are opposite to each other, with the first surface 33 facing the battery cell 20. The insulating portion 40 includes a first connecting portion 41, a body 42, and a second connecting portion 43, which are sequentially connected along the first direction z. The body 42 covers the wall of the through hole and surrounds the second through hole 420. The first connecting portion 41 is disposed on the first surface 33, and the second connecting portion 43 is disposed on the second surface 34.

[0079] In some embodiments, the first surface 33 may be the upper surface of the isolation component 30, supporting the battery cell 20. The second surface 34 may be the lower surface of the isolation component 30, facing away from the battery cell 20. The first through hole 32 extends through the first surface 33 and the second surface 34.

[0080] Referring to Figure 4 , the insulating portion 40 includes a first connecting portion 41, a body 42, and a second connecting portion 43, which are sequentially connected along a first direction z. The first connecting portion 41 is disposed on the first surface 33, and the second connecting portion 43 is disposed on the second surface 34. The body 42 is located between the first and second connecting portions 41 and 43 and is cylindrical in shape. The body 42 covers the wall of the first through hole 32 and forms a second through hole 420. The function of the second through hole 420 is to guide the exhaust of the battery cell 20 into the flue 31.

[0081] In some embodiments, the first connecting portion 41, the body 42, and the second connecting portion 43 may be an integral structure. For example, along the first direction z, the second connecting portion 43 passes through the first through hole 32 so that the body 42 covers the hole wall of the first through hole 32, and then the second connecting portion 43 is bent toward the second surface 34. In other embodiments, the first connecting portion 41, the body 42, and the second connecting portion 43 may be separate structures, with adjacent ones connected in sequence.

[0082] In the above scheme, by providing the first connecting part 41, the main body 42 and the second connecting part 43 that are interconnected, on the one hand, the risk of overlap between the pressure relief structure and the isolation component 30 can be effectively reduced. On the other hand, a stable connection relationship is established between the insulating part 40 and the isolation component 30, so that the battery 100 has higher reliability.

[0083] According to some embodiments of the present application, the first connection portion 41 is annular and disposed around the second through hole 420 .

[0084] “The first connection portion 41 is annular and arranged around the second through hole 420” can be understood as that the first connection portion 41 is arranged around the main body 42 to connect the first surface 33 and the main body 42 to each other at any position in the circumference of the main body 42. At the same time, the first connection portion 41 will not close the second through hole 420, so that the pressure relief portion 21 can directly correspond to the second through hole 420, so that when the pressure relief portion 21 is actuated, the pressure relief structure is flipped, and the discharge of the battery cell 20 directly enters the second through hole 420.

[0085] In the above scheme, by setting the first connecting part 41 to be arranged around the second through hole 420, on the one hand, the connection area between the insulating part 40 and the first surface 33 can be increased, so that the insulating part 40 and the isolation component 30 have a stable connection relationship. On the other hand, high-temperature and high-pressure emissions can smoothly pass through the second through hole 420 into the flue 31, so that the battery cell 20 and the emissions are isolated from each other, reducing the risk of thermal runaway of the battery 100 and improving the reliability of the battery 100.

[0086] According to some embodiments of the present application, please refer to Figures 5 and 6. Figure 5 is a schematic diagram of the battery cell 20, the isolation component 30 and the insulating part 40 in some embodiments of the present application, and Figure 6 is a partial schematic diagram of the isolation component 30 and the insulating part 40 in some embodiments of the present application.

[0087] An adhesive layer 50 is disposed between the battery cell 20 and the isolation component 30 , connecting the battery cell 20 and the isolation component 30 . A spacer 60 is also disposed between the battery cell 20 and the isolation component 30 . The spacer 60 is disposed around the pressure relief portion 21 to isolate the pressure relief portion 21 from the adhesive layer 50 . A portion of the first connecting portion 41 is sandwiched between the spacer 60 and the first surface 33 .

[0088] In some embodiments, the adhesive layer 50 is located between the battery cell 20 and the isolation component 30, connecting the battery cell 20 and the isolation component 30. In some embodiments, the adhesive layer 50 is formed by drying a liquid fluid having adhesive properties, such as glue. For example, the glue is injected between the battery cell 20 and the first surface 33, and the adhesive layer 50 is formed after the glue dries.

[0089] In some embodiments, the spacer 60 is annular and disposed between the first surface 33 and the battery cell 20 and around the pressure relief portion 21. The spacer 60 functions to isolate the glue from the pressure relief portion 21, reducing any interference with the glue. In some embodiments, the spacer 60 may be a rubber strip. In some embodiments, the spacer 60 may be made of materials including, but not limited to, plastic, silicone, and the like.

[0090] The phrase "a portion of the first connection portion 41 is sandwiched between the spacer 60 and the first surface 33" can be understood as meaning that the first connection portion 41 is pressed against the first surface 33 by the spacer 60. Referring to Figures 5 and 6 , the outer edge of the first connection portion 41 is pressed against the first surface 33 by the spacer 60. In some embodiments, the first connection portion 41 and the spacer 60 are both annular, with the inner ring size of the first connection portion 41 being smaller than the inner ring size of the spacer 60, and the outer ring size of the first connection portion 41 being smaller than the inner ring size of the spacer 60.

[0091] In the above scheme, in some embodiments, the battery cell 20 is connected to the isolation component 30 by bonding, and the pressure relief portion 21 is separated from the adhesive layer 50 by the isolation member 60, reducing interference of the adhesive layer 50 on the pressure relief portion 21 and allowing the pressure relief portion 21 to release pressure smoothly. To this end, by sandwiching a portion of the first connecting portion 41 between the isolation member 60 and the first surface 33, the internal structure of the battery 100 can be rationally utilized, maintaining the insulating portion 40 in a stable state, thereby effectively improving the insulating portion 40's effectiveness in insulating and isolating the pressure relief structure from the isolation component 30, thereby improving the reliability of the battery 100.

[0092] According to some embodiments of the present application, referring to FIG. 5 and FIG. 6 , the second connection portion 43 is annular and is disposed around the second through hole 420 .

[0093] “The second connection portion 43 is annular and arranged around the second through hole 420” can be understood as that the second connection portion 43 is arranged around the main body 42 to connect the second surface 34 and the main body 42 to each other at any position in the circumference of the main body 42. At the same time, the second connection portion 43 will not close the second through hole 420, so that the pressure relief portion 21 can directly correspond to the second through hole 420, so that when the pressure relief portion 21 is actuated, the pressure relief structure flips over, and the emissions from the battery cell 20 directly enter the flue 31 through the second through hole 420.

[0094] In the above scheme, by setting the second connecting part 43 to be set around the second through hole 420, on the one hand, the connection area between the insulating part 40 and the second surface 34 can be increased, so that the insulating part 40 and the isolation component 30 have a stable connection relationship. On the other hand, high-temperature and high-pressure emissions can smoothly pass through the second through hole 420 into the flue 31 to isolate the emissions and the battery cell 20, reduce the risk of thermal runaway of the battery 100, and improve the reliability of the battery 100.

[0095] According to some embodiments of the present application, referring to FIG. 6 , a notch 430 is provided between the second connection portion 43 and the body 42 . The notch 430 is provided facing the hole wall of the first through hole 32 . The second connection portion 43 is bent along the notch 430 and provided on the second surface 34 .

[0096] The notch 430 is a slot structure formed between the second connecting portion 43 and the body 42. The opening of the notch 430 may be positioned toward the wall of the first through-hole 32. The phrase "the second connecting portion 43 is bent along the notch 430 and disposed on the second surface 34" can be understood as meaning that when the second connecting portion 43 is unbent, it extends along the first direction z. When the insulating portion 40 is assembled with the isolation component 30, the second connecting portion 43 passes through the first through-hole 32 and bends along the notch 430 toward the second surface 34, thereby being disposed on the second surface 34.

[0097] In the above solution, by providing a notch 430 between the second connecting portion 43 and the body 42 , the second connecting portion 43 can be efficiently bent along the notch 430 and arranged on the second surface 34 , thereby improving the efficiency of assembling the insulating portion 40 to the isolation component 30 and further improving the manufacturing efficiency of the battery 100 .

[0098] According to other embodiments of the present application, see Figures 7 and 8. Figure 7 is a schematic diagram of the isolation component 30 and the insulating portion 40 in other embodiments of the present application, and Figure 8 is a partial schematic diagram of the isolation component 30 and the insulating portion 40 in other embodiments of the present application. The second connecting portion 43 and the body 42 are separate structures.

[0099] In some embodiments, the second connection portion 43 and the body 42 are independent structures, and the connection relationship between the second connection portion 43 and the body 42 includes but is not limited to bonding, welding, riveting or connecting components.

[0100] In some embodiments, the first connecting portion 41 and the main body 42 are an integral structure. When assembling the insulating portion 40, the main body 42 is first inserted into the first through hole 32 along the first direction z, the first connecting portion 41 is overlapped on the first surface 33, and then the second connecting portion 43 is connected to the main body 42 from the side of the isolation component 30 away from the first connecting portion 41.

[0101] In other embodiments, the first connecting portion 41 and the main body 42 are separate structures. When assembling the insulating portion 40, the main body 42 can be connected to the first connecting portion 41, and then the main body 42 can be inserted into the first through hole 32 along the first direction z. The first connecting portion 41 is overlapped on the first surface 33, and then the second connecting portion 43 is connected to the main body 42 from the side of the isolation component 30 facing away from the first connecting portion 41.

[0102] In the above solution, by setting the second connecting part 43 and the main body 42 as independent split structures, the difficulty of assembling the insulating part 40 on the isolation component 30 can be reduced (for example, along the first direction z, the main body 42 is passed through the first through hole 32, and then the second connecting part 43 is connected to the main body 42), thereby improving the manufacturing efficiency of the battery 100.

[0103] According to some embodiments of the present application, referring to Figures 7 and 8, the second connecting portion 43 is plate-shaped, and the second connecting portion 43 has a weak part 431 and a flange 432 surrounding the weak part 431. The flange 432 is connected to the main body 42 and is arranged on the second surface 34. The weak part 431 closes the second through hole 420, and the structural strength of the weak part 431 is less than the structural strength of the flange 432.

[0104] In some embodiments, the second connector is plate-shaped and includes a weak member 431 and a flange 432. The flange 432 is disposed around the weak member 431. A portion of the flange 432 is connected to the body 42, and another portion of the flange 432 is connected to the second surface 34. The weak member 431 is located in the middle of the second connector and closes the second through hole 420.

[0105] “The structural strength of the weak part 431 is less than the structural strength of the flange 432” can be understood as, the structural strength of the flange 432 is greater, the flange 432 is connected to the main body 42 and the second surface 34, and can make the connection relationship between the insulating part 40 and the isolation part 30 stable; the structural strength of the weak part 431 is relatively small, and can be broken through by the emissions from the battery cell 20 so that the emissions can enter the flue 31.

[0106] In some embodiments, the material of the weak part 431 and the material of the flange 432 can be the same or different. For example, the flange 432 and the weak part 431 are made of the same material, and the thickness is adjusted so that the structural strength of the weak part 431 is less than the structural strength of the flange 432. For another example, the flange 432 can be made of a material with lower structural strength and connected to the flange 432 by bonding, welding or other connection methods.

[0107] In the above solution, on the one hand, by setting the second connecting part 43 to be plate-shaped, the difficulty of connecting the second connecting part 43 to the main body 42 can be reduced, and the efficiency of assembling the insulating part 40 can be improved. On the other hand, by setting a weak part 431 with lower structural strength, the emissions can smoothly break through the weak part 431 to enter the flue 31, thereby effectively isolating the battery cell 20 from the emissions, so that the battery 100 has higher reliability.

[0108] According to some embodiments of the present application, the thickness of the weak member 431 is smaller than the thickness of the flange 432 .

[0109] 8 , the thickness of the weak member 431 is less than the thickness of the flange 432. For example, the thickness of the weak member 431 is half, one third, one quarter, or other values ​​of the thickness of the flange 432.

[0110] In some embodiments, under the condition that the thickness of the weak part 431 is less than the thickness of the flange 432 , the material of the weak part 431 and the material of the flange 432 can be the same or different, so that the discharge of the battery cell 20 can break through the weak part 431 .

[0111] In the above solution, by setting the thickness of the weak portion to be smaller than the thickness of the flange 432, the emissions can smoothly break through the weak part 431 and enter the flue 31, thereby effectively isolating the battery cell 20 from the emissions, making the battery 100 more reliable.

[0112] In other embodiments, the thickness of the weak part 431 may be equal to or greater than the thickness of the flange 432. For example, the structural strength of the manufacturing material of the weak part 431 may be less than the structural strength of the manufacturing material of the flange 432. Due to the condition that the structural strength of the manufacturing material is relatively low, the thickness of the weak part 431 may be less than, equal to, or greater than the thickness of the flange 432, subject to the fact that the weak part 431 can be broken through by the emissions from the battery cell 20.

[0113] According to some embodiments of the present application, please refer to Figures 9 and 10. Figure 9 is a schematic diagram of the isolation component 30 and the insulating part 40 in other embodiments of the present application, and Figure 10 is a partial schematic diagram of the isolation component 30 and the insulating part 40 in other embodiments of the present application.

[0114] The body 42 includes a first portion 421 and a second portion 422, which together cover the wall of the first through-hole 32. The first portion 421 and the first connecting portion 41 are connected to each other to form a first insulating member 44, and the second portion 422 and the second connecting portion 43 are connected to each other to form a second insulating member 45. The first insulating member 44 and the second insulating member 45 are connected to each other by the first portion 421 and the second portion 422 to be assembled to the isolation component 30.

[0115] In some embodiments, the insulating portion 40 may include a first insulating member 44 and a second insulating member 45, wherein the first insulating member 44 and the second insulating member 45 are separate structures. The first insulating member 44 includes a first connecting portion 41 and a first portion 421. The first connecting portion 41 is disposed on the first surface 33, and the first portion 421 is located in the first through-hole 32. The second insulating portion 40 includes a second connecting portion 43 and a second portion 422. The second connecting portion 43 is disposed on the second surface 34, and the second portion 422 is located in the first through-hole 32. The first portion 421 and the second portion 422 are connected to each other to form the body 42.

[0116] In some embodiments, the assembly process of the insulating part 40 and the isolation part 30 can be: the first part 421 of the first insulating part 44 is placed in the first through hole 32, and the first connecting part 41 is in contact with the first surface 33; the second part 422 of the second insulating part 45 is placed in the first through hole 32, and the second connecting part 43 is in contact with the first surface 33; the first part 421 and the second part 422 are connected to each other in the first through hole 32.

[0117] In some embodiments, the connection relationship between the first part 421 and the second part 422 includes but is not limited to bonding, threaded connection, snap connection or other connection methods.

[0118] In the above solution, by setting the insulating part 40 as a first insulating part 44 and a second insulating part 45 that are independent of each other, and the first insulating part 44 and the second insulating part 45 are connected by the first part 421 and the second part 422, the difficulty of assembling the insulating part 40 on the isolation part 30 can be effectively reduced, thereby improving the manufacturing efficiency of the battery 100.

[0119] According to some embodiments of the present application, referring to FIG. 10 , a slot 4210 is formed on the surface of the first portion 421 facing the hole wall of the first through hole 32 , the second portion 422 is sleeved on the first portion 421 , and a block 4220 is protruding from the second portion 422 , and the block 4220 is disposed in the slot 4210 .

[0120] In some embodiments, the first portion 421 and the second portion 422 may be connected to each other by snapping. For example, one of the first portion 421 and the second portion 422 is provided with a snap slot 4210 , and the other is provided with a snap block 4220 .

[0121] In some embodiments, referring to FIG. 10 , a groove is formed on the surface of the first portion 421 facing the wall of the first through hole 32, and a latching groove 4210 is formed on the wall of the groove. The second portion 422 is inserted into the groove, and a latching block 4220 is protruded from the portion of the second portion 422 inserted into the groove. The latching block 4220 is disposed in the latching groove 4210, so that the first portion 421 and the second portion 422 are latched together.

[0122] In the above solution, by providing the mutually cooperating card slots 4210 and card blocks 4220 , the assembly effect of the first insulating member 44 and the second insulating member 45 can be improved, and a stable connection relationship can be established between the first insulating member 44 and the second insulating member 45 .

[0123] According to some embodiments of the present application, the insulating portion 40 is a high-temperature resistant insulating portion.

[0124] The high temperature resistant insulating part may mean that the insulating part 40 has a certain heat resistance. For example, at a temperature of 300°C-600°C, the insulating part 40 also has an insulating function, so that the insulating part 40 can insulate and isolate the pressure relief structure and the isolation component 30 under the action of high temperature and high pressure emissions from the battery cell 20.

[0125] Exemplarily, the insulating portion 40 is made of an insulating material with a certain heat resistance, such as mica, ceramic, or quartz, etc. Exemplarily, the insulating portion 40 is a composite material made of mica, ceramic, or quartz, etc.

[0126] In the above solution, by setting the insulating part 40 as a high-temperature resistant insulating part, the insulating part 40 can withstand higher temperatures, reducing the risk of damage to the insulating part 40 caused by high-temperature and high-pressure emissions, resulting in insulation failure of the insulating part 40, so that the battery 100 has higher reliability.

[0127] According to some embodiments of the present application, the insulating portion 40 is made of a material including mica, ceramic, or quartz.

[0128] According to some embodiments of the present application, the isolation component 30 includes a thermal management component, which is used to adjust the temperature of the battery cell 20 .

[0129] In some embodiments, the isolation component 30 can be a thermal management component, which is a component used to regulate the temperature of the battery cell 20. The thermal management component contains a medium to regulate the temperature of the battery cell 20, so that the battery 100 is within a suitable temperature range, ensuring the transfer activity of metal ions between the positive and negative electrodes, and making the battery 100 have better charge and discharge performance. The medium here can be a liquid, such as water, or a mixture of water and ethylene glycol, etc., which can regulate the temperature. Regulating the temperature means heating or cooling the battery cell 20. Optionally, the medium can be circulated to achieve a better temperature regulation effect. Optionally, the medium is unidirectional, that is, the medium flows into the interior of the thermal management component through the inlet of the thermal management component and exchanges heat with the battery cell 20, and is then discharged from the outlet of the thermal management component, and the discharged medium does not enter the thermal management component again.

[0130] In some embodiments, a flow channel is formed inside the thermal management component for the medium to flow in. The first through hole 32 of the thermal management component is arranged away from the flow channel.

[0131] The thermal management component may be a water-cooled plate having a plurality of flow channels provided therein for the medium to flow in. In other embodiments, the thermal management component may be other components capable of accommodating the medium and performing heat exchange with the battery cell 20 .

[0132] In some embodiments, the thermal management component may be made of metal materials such as aluminum, aluminum alloy, or stainless steel.

[0133] In the above solution, by setting the isolation component 30 as a thermal management component, the isolation component 30 can not only form a flue 31 for exhaust of emissions, but also has the function of regulating the temperature of the battery cell 20, so that the internal structure of the battery 100 is compact, which is conducive to improving the energy density of the battery 100.

[0134] According to some embodiments of the present application, there is further provided an electrical device, comprising the battery 100 described above, wherein the battery 100 is configured to provide electrical energy.

[0135] The electrical device can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. Referring to FIG1 , the electrical device is a vehicle, and the battery 100 can serve not only as the operating power source of the vehicle but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0136] According to some embodiments of the present application, a battery 100 is provided, as shown in FIG. 2 to FIG. 10 .

[0137] The battery 100 includes a housing 10, battery cells 20, a thermal management component, and an insulating portion 40. The battery cells 20 are disposed within the housing 10 and have pressure relief portions 21 for relieving internal pressure within the cells. The thermal management component is disposed within the housing 10 to regulate the temperature of the battery cells 20. Along a first direction z, the thermal management component and the pressure relief portion 21 are located on the same side. Together, the thermal management component and the wall of the housing 10 form a flue 31, located on the side of the thermal management component facing away from the battery cells 20. The thermal management component has a first through-hole 32 connected to the flue 31, corresponding to the pressure relief portion 21, to guide exhaust from the battery cells 20 into the flue 31. The insulating portion 40 at least partially covers the wall of the first through-hole 32. The pressure relief portion 21 may be an explosion-proof valve. When the valve is actuated, the explosion-proof disc flips open the outer shell of the battery cell 20, allowing internal pressure to escape.

[0138] The above solution, by providing the insulating portion 40 on the thermal management component, can effectively reduce the risk of the explosion-proof disk and the thermal management component overlapping, which may cause an internal short circuit in the battery 100 , thereby making the battery 100 more reliable.

[0139] In some embodiments, an adhesive layer 50 is disposed between the battery cell 20 and the thermal management component, connecting the battery cell 20 and the thermal management component. A spacer 60 is also disposed between the battery cell 20 and the thermal management component, surrounding the pressure relief portion 21 to isolate the pressure relief portion 21 from the adhesive layer 50.

[0140] Referring to Figures 5 and 6 , the insulating portion 40 includes a first connecting portion 41, a body 42, and a second connecting portion 43, which are sequentially connected along a first direction z. The body 42 covers the wall of the through-hole and surrounds the second through-hole 420. The first connecting portion 41 is disposed on the first surface 33, and the second connecting portion 43 is disposed on the second surface 34. The first connecting portion 41 is annular and disposed around the second through-hole 420, with a portion of the first connecting portion 41 sandwiched between the isolation member 60 and the first surface 33. The second connecting portion 43 is annular and disposed around the second through-hole 420. A notch 430 is disposed between the second connecting portion 43 and the body 42. The notch 430 is disposed facing the wall of the first through-hole 32, and the second connecting portion 43 is bent along the notch 430 and disposed on the second surface 34.

[0141] Referring to Figures 7 and 8 , the insulating portion 40 includes a first connecting portion 41, a body 42, and a second connecting portion 43, which are sequentially connected along a first direction z. The body 42 covers the wall of the through-hole and surrounds the second through-hole 420. The first connecting portion 41 is disposed on the first surface 33, and the second connecting portion 43 is disposed on the second surface 34. The first connecting portion 41 is annular and surrounds the second through-hole 420, with a portion of the first connecting portion 41 sandwiched between the isolation member 60 and the first surface 33. The second connecting portion 43 is plate-shaped and includes a weakening member 431 and a flange 432 surrounding the weakening member 431. The flange 432 is connected to the body 42 and disposed on the second surface 34. The weakening member 431 seals the second through-hole 420. The thickness of the weakening member 431 is less than that of the flange 432, and the structural strength of the weakening member 431 is less than that of the flange 432. By providing the weak member 431 with relatively low structural strength, the emissions can smoothly break through the weak member 431 and enter the flue 31 , thereby effectively isolating the battery cell 20 from the emissions, and making the battery 100 highly reliable.

[0142] 9 and 10 , the insulating portion 40 may include a first insulating member 44 and a second insulating member 45 , which are separate structures. The first insulating member 44 includes a first connecting portion 41 and a first portion 421 . The first connecting portion 41 is disposed on the first surface 33 , and the first portion 421 is located in the first through-hole 32 . The second insulating portion 40 includes a second connecting portion 43 and a second portion 422 . The second connecting portion 43 is disposed on the second surface 34 , and the second portion 422 is located in the first through-hole 32 . The first portion 421 and the second portion 422 are interconnected to form a main body 42 . The main body 42 covers the wall of the through-hole and surrounds the second through-hole 420 . The first insulating member 44 and the second insulating member 45 are interconnected via the first portion 421 and the second portion 422 to be assembled to the isolation component 30 .

[0143] The foregoing description is merely a preferred embodiment of the present application and is not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery, wherein: include: Box; A battery cell is disposed inside the box body, and the battery cell has a pressure relief portion, and the pressure relief portion is used to release the internal pressure of the battery cell; an isolation component disposed inside the box, arranged on the same side as the pressure relief portion along a first direction, the isolation component and the wall of the box jointly forming a flue, the flue being located on a side of the isolation component away from the battery cell, the isolation component having a first through hole communicating with the flue, the through hole being arranged corresponding to the pressure relief portion and being used to guide emissions from the battery cell into the flue; An insulating portion, wherein at least a portion of the insulating portion covers a hole wall of the first through hole.

2. The battery according to claim 1, wherein Along the first direction, the isolation component has a first surface and a second surface opposite to each other, and the first surface is arranged facing the battery cell; The insulating portion includes a first connecting portion, a body, and a second connecting portion sequentially connected along the first direction. The body covers the hole wall of the through hole and surrounds the second through hole. The first connecting portion is arranged on the first surface, and the second connecting portion is arranged on the second surface.

3. The battery according to claim 2, wherein The first connecting portion is annular and is disposed around the second through hole.

4. The battery according to claim 2 or 3, wherein An adhesive layer is provided between the battery cell and the isolation component, wherein the adhesive layer connects the battery cell and the isolation component; An isolating member is further provided between the battery cell and the isolation component. The isolating member is disposed around the pressure relief portion to isolate the pressure relief portion from the adhesive layer. Part of the first connecting portion is sandwiched between the isolating member and the first surface.

5. The battery according to any one of claims 2 to 4, wherein: The second connecting portion is annular and disposed around the second through hole.

6. The battery according to claim 5, wherein A notch is provided between the second connecting portion and the body, the notch is arranged facing the hole wall of the first through hole, and the second connecting portion is bent along the notch and arranged on the second surface.

7. The battery according to any one of claims 2 to 6, wherein: The second connecting portion and the main body are separate structures.

8. The battery according to claim 7, wherein The second connecting portion is plate-shaped and has a weak part and a flange surrounding the weak part. The flange is connected to the body and is arranged on the second surface. The weak part closes the second through hole, and the structural strength of the weak part is less than the structural strength of the flange.

9. The battery according to claim 8, wherein The thickness of the weak part is smaller than the thickness of the flange.

10. The battery according to any one of claims 2 to 9, wherein: The main body includes a first part and a second part, the first part and the second part jointly cover the hole wall of the first through hole; the first part and the first connecting part are interconnected to form a first insulating member, and the second part and the second connecting part are interconnected to form a second insulating member; the first insulating member and the second insulating member are interconnected through the first part and the second part to be assembled on the isolation component.

11. The battery according to claim 10, wherein A clamping groove is formed on the surface of the first part facing the hole wall of the first through hole. The second part is sleeved on the first part, and a clamping block is protruded from the second part. The clamping block is arranged in the clamping groove.

12. The battery according to any one of claims 1 to 11, wherein: The insulating portion is a high temperature resistant insulating portion.

13. The battery according to claim 12, wherein The insulating part is made of mica, ceramic or quartz.

14. The battery according to any one of claims 1 to 13, wherein The isolation component includes a thermal management component for regulating the temperature of the battery cell.

15. An electrical device, wherein: The battery according to any one of claims 1 to 14 is used to provide electrical energy.

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