Battery and electric device

Abstract

The embodiment of the utility model provides a battery and an electric device. The battery comprises a box body and an anti-explosion valve, the anti-explosion valve comprises a valve body, a piston and a cover plate, the valve body is arranged in the box body and is in equipotential connection with the box body, the piston is arranged in the valve body, the cover plate is arranged on the side, away from the valve body, of the piston, and the cover plate is in direct contact connection with the piston. The valve body and the box body are in equipotential connection, the potential difference between the valve body and the box body is reduced, the piston is arranged in the valve body, the piston is in direct contact with the valve body in a normal state, equipotential connection is achieved, the cover plate and the piston are in direct contact connection, equipotential connection is also achieved, and therefore the potential difference between all parts of the explosion-proof valve can be reduced, and the explosion-proof effect is improved. And a human body cannot become a path between high voltage and low voltage, so that the occurrence of electric shock accidents is reduced, and the safety of the battery is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0002] In some related technologies, the battery includes an explosion-proof valve, which is lifted and opened by high-pressure gas to discharge the high-temperature gas in the battery housing. There may be a potential difference on the explosion-proof valve, which will cause safety hazards. Utility Model Content

[0003] Some embodiments of the present application provide a battery and an electrical device for improving the safety of the battery.

[0004] Some embodiments of the present application also provide a battery, comprising: a box body, and an explosion-proof valve, comprising a valve body, a piston and a cover plate, wherein the valve body is arranged in the box body and is connected to the box body at the same potential, the piston is arranged in the valve body, the cover plate is arranged on a side of the piston away from the valve body, and the cover plate is directly contacted with the piston.

[0005] In the above embodiment, the valve body and the box body are connected at the same potential, which reduces the potential difference between the valve body and the box body. The piston is arranged in the valve body, and in a normal state, the piston is in direct contact with the valve body, realizing the same potential connection. The cover plate is directly contacted with the piston, and also realizing the same potential connection. Therefore, the potential difference between the various components of the explosion-proof valve can be reduced, so that the human body will not become a path between high voltage and low voltage, thereby reducing the occurrence of electric shock accidents.

[0006] In some embodiments, the cover plate is connected to the piston via a matching structure formed by a clamping member and a clamping groove.

[0007] In the above embodiment, the cover plate and the piston are connected by a matching structure formed by a clamping piece and a clamping groove, which can not only realize a direct contact connection between the cover plate and the piston, reduce the potential difference between the cover plate and the piston, and prevent the human body from becoming a path between high voltage and low voltage, thereby reducing the occurrence of electric shock accidents, but also has the function of easy assembly and disassembly, reducing assembly time and improving production efficiency.

[0008] In some embodiments, the clamping member includes a first clamping portion, which is disposed on the cover plate and extends toward the piston, the clamping groove is disposed on the piston, the clamping groove includes a first groove that is recessed from the outer edge of the piston toward the center axis of the piston, and the first clamping portion is disposed in the first groove.

[0009] In the above embodiment, the first clamping portion is arranged on the cover plate and extends toward the piston. The outer edge of the piston is concave toward the center axis of the piston to form a first groove. The first clamping portion is arranged in the first groove. The first clamping portion is clamped into the first groove from the outer edge of the piston, which makes it easy to assemble the first clamping portion and the first groove. The first clamping portion is located in the first groove, which will not increase the outer edge size of the piston, and the flatness of the outer edge surface of the piston is maintained. The first groove is formed from the outer edge of the piston toward the center axis of the piston, which is easy to process and reduces costs.

[0010] In some embodiments, the clamping member further includes a second clamping portion, which is disposed on the first clamping portion and extends toward the central axis of the cover plate, and the clamping slot further includes a second slot, in which the second clamping portion is disposed.

[0011] In the above embodiment, the second clamping portion is disposed in the second groove, and the piston and the cover plate are connected via two clamping portions and two clamping grooves, which can improve the reliability of the connection between the piston and the cover plate and reduce the risk of accidental falling off.

[0012] In some embodiments, the second groove is recessed from a side of the piston adjacent to the valve body toward an interior of the piston.

[0013] In the above embodiment, the second groove is arranged on the side of the piston adjacent to the valve body, which is convenient for processing. The second groove cooperates with the first groove so that the clamping part is clamped in the clamping groove from the edge and bottom of the piston, which can improve the stability and reliability of the connection between the piston and the cover plate and is easy to install and disassemble.

[0014] In some embodiments, the second groove is communicated with the first groove, the first groove and the second groove form a step portion, and the step portion is adapted to a corner portion formed by the second clamping portion and the first clamping portion.

[0015] In the above embodiment, the step portion formed by the first groove and the second groove is adapted to the corner portion formed by the second clamping portion and the first clamping portion, which can limit the clamping member and reduce the risk of the clamping member detaching from the clamping groove.

[0016] In some embodiments, an inclined surface is provided on a side of the second clamping portion away from the cover plate, and the inclined surface approaches the cover plate along a direction from the first clamping portion to a central axis of the cover plate.

[0017] In the above embodiment, the inclined surface is conducive to guiding the second clamping part to pass through the first groove and then enter the second groove, and can also produce a small deformation, deforming toward the outside of the piston, and recovering the deformation after the second clamping part enters the second groove. The first groove and the second groove form a step portion to limit the clamping part, and the second clamping part is located in the second groove and hooks the bottom of the second groove, which can improve the stability and reliability of the connection between the piston and the cover plate.

[0018] In some embodiments, a third groove is provided on the piston, the third groove is recessed from a side of the piston adjacent to the cover plate toward the interior of the piston, and the third groove is connected to the first groove, and the third groove forms a notch on the edge of the piston.

[0019] In the above embodiment, the third groove is recessed from the side of the piston adjacent to the cover plate toward the inside of the piston, and a notch is formed at the edge of the piston. After the cover plate is set on the piston, a vent is formed at the notch between the piston and the cover plate, allowing gas to enter between the piston and the cover plate.

[0020] In some embodiments, a middle region of the piston is recessed toward the valve body, and a circumferential region of the piston is directly contact-connected with the cover plate.

[0021] In the above embodiment, the circumferential area of ​​the piston is directly contact-connected with the cover plate, which can realize the direct contact-connection between the piston and the cover plate without affecting the arrangement of the components in the recessed area in the middle of the piston.

[0022] In some embodiments, the cover plate is constructed as a sheet-like structure with a flat surface.

[0023] In the above embodiment, the cover plate is a sheet structure with a flat surface and a simple structure. It can improve the sealing between the cover plate and the piston, making the cover plate waterproof and dustproof. The surface of the cover plate is flat, which can improve the flatness and aesthetics of the explosion-proof valve.

[0024] In some embodiments, a clamping piece is provided on the cover plate, a clamping groove is provided in the circumferential area of ​​the piston, and the cover plate and the piston are connected via a matching structure formed by the clamping piece and the clamping groove.

[0025] In the above embodiment, a snap-fit ​​groove is provided in the circumferential region of the piston, which will not affect the overall structural strength of the piston, and the circumferential region of the piston is raised relative to the middle region, which is conducive to direct contact connection with the cover plate.

[0026] In some embodiments, the clamping member includes a first clamping member and a second clamping member arranged opposite to each other, the clamping slot includes a first clamping slot and a second clamping slot arranged opposite to each other, the first clamping member is cooperatively connected with the first clamping slot, and the second clamping member is cooperatively connected with the second clamping slot.

[0027] In the above embodiment, during the assembly of the cover plate and the piston, the first clamping member and the second clamping member arranged opposite to each other on the cover plate are respectively arranged in the first clamping groove and the second clamping groove arranged opposite to each other on the piston, so that the first clamping member and the second clamping member can form a structure for clamping the piston, so that the clamping member can contact the clamping groove more closely, thereby improving the reliability and stability of the connection between the piston and the cover plate.

[0028] In some embodiments, the clamping member is disposed on an edge of the cover plate and extends toward the piston, and the clamping groove is recessed from the outer edge of the piston toward the central axis of the piston.

[0029] In the above embodiment, the first clamping member and the second clamping member both approach each other from the outer edge of the piston and are respectively clamped into the first clamping groove and the second clamping groove, clamping the piston from the outer edge of the piston so that the clamping grooves can contact more closely with each other, thereby improving the reliability and stability of the connection between the piston and the cover plate.

[0030] In some embodiments, the cover plate and the piston are connected by interference fit via a concave-convex fitting structure.

[0031] In the above embodiment, the cover plate and the piston are connected by interference fit through a concave-convex matching structure. This connection method is not only convenient for positioning during installation by utilizing the characteristics of the concave-convex combination, but also only requires the size of the convex part to be designed to be slightly larger than the size of the concave part to achieve interference fit. The structure is simple, easy to manufacture, and reduces production costs.

[0032] In some embodiments, the concave-convex fitting structure includes a groove arranged on a side of the piston adjacent to the cover plate, and a protrusion arranged on a side of the cover plate adjacent to the piston. The protrusion is arranged in the groove and has an interference fit with the groove to achieve an interference fit connection between the cover plate and the piston.

[0033] In the above embodiment, a protrusion is provided on the side of the cover plate adjacent to the piston, and a groove is provided on the side of the piston adjacent to the cover plate. The cover plate is pressed toward the piston, and the protrusion extends into the groove, so that an interference fit connection between the cover plate and the piston can be achieved, which is easy to install.

[0034] In some embodiments, the number of the grooves is multiple, and the multiple grooves are spaced apart on the piston; the number of the protrusions is multiple, and the multiple protrusions are spaced apart on the cover plate; the multiple protrusions and the multiple grooves correspond one to one and are shaped to achieve an interference fit.

[0035] In the above embodiment, the number of grooves is the same as the number of protrusions, and their positions correspond. When the cover plate is installed on the piston, it is ensured that each protrusion can be engaged in the corresponding groove, and the size of each protrusion is slightly larger than the size of the corresponding groove, so that each protrusion and each groove form an interference fit, further improving the tightness of the connection between the cover plate and the piston, eliminating the potential difference between the two, and reducing the risk of electric shock.

[0036] In some embodiments, a recessed depth of the groove relative to the piston is equal to a raised height of the bump relative to the cover plate.

[0037] In the above embodiment, the depth of the groove is the same as the height of the protrusion. When the groove and the protrusion cooperate with each other, on the basis of the circumferential side surface of the protrusion being in contact with the circumferential side surface of the groove, the end surface of the protrusion away from the cover plate can also be in contact with the bottom surface of the groove, thereby increasing the contact area, further improving the tightness of the connection between the cover plate and the piston, reducing the potential difference and thus reducing the risk of electric shock.

[0038] In some embodiments, the groove is arranged at an edge of an end surface of the piston, and the protrusion is arranged at an edge of an end surface of the cover plate.

[0039] In the above embodiment, the grooves are arranged on the edge of the piston, which can reduce the space occupied by the middle area of ​​the piston, and the circumferentially distributed grooves can define a central circular area on the piston, which is convenient for setting other components, such as seals. Therefore, the size of the piston does not need to be increased due to the additional grooves, so that the overall size of the explosion-proof valve can be maintained at the original size.

[0040] In some embodiments, the groove extends to and penetrates the edge of the piston, and an outer edge of the protrusion away from the center of the cover plate coincides with the edge of the cover plate.

[0041] In the above embodiment, the groove is extended to the outer edge of the piston in the radial direction of the piston and penetrates the edge of the piston, thereby increasing the contact area between the groove and the protrusion without increasing the size of the piston, further ensuring that the cover plate and the piston can be in close contact, reducing the potential difference, and improving the reliability of the explosion-proof valve. Some embodiments of the present application also provide an electrical device, which includes the battery in any of the above embodiments.

[0042] The electrical device provided in the embodiment of the present application includes the battery provided in any of the above embodiments, and correspondingly has the beneficial effects of the battery.

[0043] Based on the above technical solution, this application has at least the following beneficial effects:

[0044] In some embodiments, the valve body and the housing are connected at the same potential, which reduces the potential difference between the valve body and the housing. The piston is arranged in the valve body, and in a normal state, the piston is in direct contact with the valve body, realizing the same potential connection. The cover plate is directly contacted with the piston, which also realizes the same potential connection. Therefore, the potential difference between the various components of the explosion-proof valve can be reduced, so that the human body will not become a path between high voltage and low voltage, thereby reducing the occurrence of electric shock accidents and improving the safety of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. 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 paying creative work.

[0046] Figure 1 is a schematic structural diagram of a vehicle disclosed in some embodiments of the present application;

[0047] Figure 2 is a schematic diagram of an exploded structure of a battery disclosed in some embodiments of the present application;

[0048] Figure 3 is a first angle schematic diagram of an explosion-proof valve disclosed in some embodiments of the present application;

[0049] Figure 4 is a second angle schematic diagram of an explosion-proof valve disclosed in some embodiments of the present application;

[0050] Figure 5 is a cross-sectional schematic diagram of an explosion-proof valve disclosed in some embodiments of the present application;

[0051] Figure 6 It is a schematic diagram of the exploded structure of an explosion-proof valve disclosed in some embodiments of the present application;

[0052] Figure 7 It is a schematic diagram of a three-dimensional structure after a piston and a cover plate are assembled, as disclosed in some embodiments of the present application;

[0053] Figure 8 yes Figure 7 An enlarged schematic diagram of the local structure A in FIG.

[0054] Fig. 9 is a front view schematic diagram of a piston and a cover plate assembly disclosed in some embodiments of the present application;

[0055] Fig.10 yes Fig. 9 BB cross-sectional view;

[0056] Fig.11 is a schematic diagram of a three-dimensional structure of a piston disclosed in some embodiments of the present application;

[0057] Fig.12 yes Fig.11 An enlarged schematic diagram of the local structure C in FIG.

[0058] Fig.13 is a front view schematic diagram of a piston disclosed in some embodiments of the present application;

[0059] Fig.14 yes Fig.13 DD cross-sectional diagram;

[0060] Fig.15 is a schematic diagram of a three-dimensional structure of a cover plate disclosed in some embodiments of the present application;

[0061] Fig.16 is a cross-sectional schematic diagram of a cover plate disclosed in some embodiments of the present application;

[0062] Fig.17 yes Fig.16 An enlarged schematic diagram of the local structure E in FIG.

[0063] Fig.18 is a schematic diagram of the exploded structure of an explosion-proof valve disclosed in other embodiments of the present application;

[0064] Fig.19 is a structural schematic diagram of a valve body disclosed in other embodiments of the present application;

[0065] Fig. 20 It is a structural schematic diagram of a cover plate disclosed in other embodiments of the present application.

[0066] In the drawings, the drawings are not drawn to scale.

[0067] Marking description: 1-valve body; 1a-through hole; 1b-extension part; 1c-annular seat; 2-piston; 2a-connecting part; 2b-second axial hole; 3-cover plate; 4-clamping piece; 4a-first clamping piece; 4b-second clamping piece; 41-first clamping part; 42-second clamping part; 43-corner part; 44-inclined surface; 5-clamping groove; 5a-first clamping groove; 5b-second clamping groove; 51-first groove; 52-second groove; 53-step part; 6-third groove; 61-notch; 6a-venting groove; 7-magnetic sheet; 8-mounting ring; 9-waterproof breathable membrane; 10-first sealing ring; 11-second sealing ring; 12-elastic member; 13-guide rod; 14-sheath; 15-fluid channel; 16-concave-convex matching structure; 161-groove; 162-bump;

[0068] 100 - battery; 101 - housing; 101a - first housing; 101b - second housing; 102 - battery cell; 103 - explosion-proof valve; 200 - vehicle; 201 - axle; 202 - wheel; 203 - motor; 204 - controller. DETAILED DESCRIPTION

[0069] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0070] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means 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 a limitation on 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 strictly vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0071] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this 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 this application can be understood according to the specific circumstances.

[0072] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric motorcycles and electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0073] The battery disclosed in the embodiments of the present application can be used as a power source for electrical devices or as an energy storage element for various energy storage systems.

[0074] The electrical devices may be mobile phones, portable devices, laptop computers, battery vehicles, electric vehicles, ships, spacecraft, electric toys and electric tools, etc. Among them, spacecraft may include airplanes, rockets, space shuttles and spacecrafts, 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 electric tools, grinding electric tools, assembly electric tools and railway electric tools, etc., such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc.

[0075] For the convenience of description, the following embodiments are described by taking a vehicle 200 as an example of an electrical device provided in some embodiments of the present application.

[0076] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 200 provided for some embodiments of the present application. The vehicle 200 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 200, and the battery 100 may be provided at the bottom, head or tail of the vehicle 200. The battery 100 may be used to power the vehicle 200, for example, the battery 100 may be used as an operating power source for the vehicle 200. The vehicle 200 may also include an axle 201, a wheel 202 connected to the axle 201, and a motor 203 and a controller 204, wherein the motor 203 is used to drive the axle 201 to rotate, the controller 204 is used to control the operation of the motor 203, and the battery 100 may be used to provide electrical energy for the operation of the motor 203 and other components in the vehicle.

[0077] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 200 , but also serve as a driving power source for the vehicle 200 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 200 .

[0078] Please refer to Figure 2 , Figure 2 Schematic diagram of the exploded structure of the battery 100 provided in some embodiments of the present application. The battery 100 includes a box 101 and a battery cell 102, and the battery cell 102 is contained in the box 101. Among them, the box 101 is the main storage space for the battery cell 102. The box 101 includes a first box 101a and a second box 101b, the first box 101a and the second box 101b cover each other, and the first box 101a and the second box 101b jointly define a storage space for accommodating the battery cell 102. The second box 101b may be a hollow structure with one end open, the first box 101a may be a plate-like structure, the first box 101a covers the open side of the second box 101b, so that the first box 101a and the second box 101b together define a storage space; the first box 101a and the second box 101b may also be hollow structures with one side open, the open side of the first box 101a covers the open side of the second box 101b. Of course, the box 101 formed by the first box 101a and the second box 101b may be in a variety of shapes, such as a cylinder or a cuboid. The box 101 is usually made of metal materials, such as steel or aluminum.

[0079] There may be multiple battery cells 102, and the multiple battery cells 102 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 102 are both connected in series and in parallel. The multiple battery cells 102 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 102 is accommodated in the box 101. Of course, the battery 100 may also be a battery module formed by connecting multiple battery cells 102 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 101. The battery 100 may also include other structures. For example, the battery may also include a busbar component for realizing electrical connection between the multiple battery cells 102.

[0080] The battery cell 102 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 102 may be cylindrical, flat, rectangular, or in other shapes.

[0081] In some related technologies, the battery includes an explosion-proof valve. When thermal runaway occurs in the battery box, such as an electrical short circuit or battery cell explosion, the battery cell will release a large amount of gas, and the temperature and pressure in the battery box will increase rapidly. At this time, the high-temperature gas, gas-solid mixture, etc. will be quickly discharged to the outside through the explosion-proof valve to avoid battery explosion or other more serious accidents.

[0082] Since the explosion-proof valve is arranged on the battery case, the explosion-proof valve includes multiple components. Some components of the explosion-proof valve achieve equipotential connection when the explosion-proof valve is fixedly connected to the battery case, while some components may not achieve equipotential connection. This may cause a potential difference on the explosion-proof valve, which will create a safety hazard.

[0083] Based on this, in order to alleviate the safety hazard caused by the possible potential difference on the explosion-proof valve, the present application provides a battery 100, which includes a box body 101, and an explosion-proof valve 103 arranged on the box body 101. The cover plate 3 of the explosion-proof valve 103 is directly contacted with the piston 2, which reduces the potential difference between the piston 2 and the cover plate 3, alleviates the risk of electric shock caused by the potential difference, and improves the safety of the battery 100.

[0084] The battery disclosed in the embodiment of the present application can be used in an electrical device, thereby improving the battery safety of the electrical device.

[0085] In some embodiments of the present application, reference Figure 2 , Figures 3 to 5 , a battery 100 is provided, which includes: a box body 101 and an explosion-proof valve 103.

[0086] refer to Figure 5 and Figure 6The explosion-proof valve 103 includes a valve body 1, a piston 2 and a cover plate 3. The valve body 1 is arranged in the box body 101, and the valve body 1 and the box body 101 are connected at the same potential. The piston 2 is arranged in the valve body 1, and the cover plate 3 is arranged on the side of the piston 2 away from the valve body 1, and the cover plate 3 is directly contacted with the piston 2.

[0087] In the above embodiment, the explosion-proof valve 103 may be disposed on the top or side of the box body 101. In some embodiments, the explosion-proof valve 103 may be disposed on the first box body 101a or on the second box body 101b.

[0088] In the above embodiment, when the explosion-proof valve 103 is closed, the piston 2 is in contact with the valve body 1, or in other words, the piston 2 is in contact with the valve body 1, and the explosion-proof valve 103 is in a closed state. When the explosion-proof valve 103 is opened, the piston 2 is separated from the valve body 1, or in other words, the piston 2 is separated from the valve body 1, and the explosion-proof valve 103 is in an open state.

[0089] In some embodiments, the valve body 1 and the box body 101 may be connected to each other in an equipotential manner by using a conductive component or by using a direct contact connection.

[0090] In the above embodiment, the valve body 1 and the housing 101 are connected at the same potential, which reduces the potential difference between the valve body 1 and the housing 101. The piston 2 is arranged in the valve body 1, and in a normal state, the piston 2 is in direct contact with the valve body 1, realizing the same potential connection (after the explosion-proof valve 103 is opened due to thermal runaway in the housing 101, the piston 2 is separated from the valve body 1), and the cover plate 3 is directly contacted with the piston 2, and the same potential connection is also realized. Therefore, the potential difference between the various components of the explosion-proof valve 103 can be reduced, so that the human body will not become a path between high voltage and low voltage, thereby reducing the occurrence of electric shock accidents.

[0091] In the above embodiment, the direct contact connection between the cover plate 3 and the piston 2 means that the cover plate 3 and the piston 2 are in direct contact, and there are no other components between the cover plate 3 and the piston 2. For example, the cover plate 3 and the piston 2 are not connected by an adhesive connection. The cover plate 3 and the piston 2 are in direct contact, which can achieve a conductive connection between the cover plate 3 and the piston 2, reduce the potential difference between the cover plate 3 and the piston 2, and prevent the human body from becoming a path between high voltage and low voltage, thereby reducing the occurrence of electric shock accidents and improving safety.

[0092] In some embodiments, a mounting hole is provided on the box body 101, and the mounting hole connects the inside and the outside of the box body 101. A part of the valve body 1 is provided in the mounting hole, and another part of the valve body 1 is located outside the mounting hole. The valve body 1 is fixedly connected to the periphery of the mounting hole.

[0093] refer to Figures 7 to 10In some embodiments, the cover plate 3 is connected to the piston 2 through a matching structure formed by a clamping member 4 and a clamping groove 5 .

[0094] In the above embodiment, the cover plate 3 and the piston 2 are connected by a matching structure formed by the clamping member 4 and the clamping groove 5, which can not only realize the direct contact connection between the cover plate 3 and the piston 2, reduce the potential difference between the cover plate 3 and the piston 2, and prevent the human body from becoming a path between high voltage and low voltage, thereby reducing the occurrence of electric shock accidents, but also has the function of easy assembly and disassembly, reducing assembly time and improving production efficiency.

[0095] refer to Figures 11 to 17 In some embodiments, the clamping member 4 includes a first clamping portion 41, which is disposed on the cover plate 3 and extends toward the piston 2. The clamping groove 5 is disposed on the piston 2. The clamping groove 5 includes a first groove 51 that is recessed from the outer edge of the piston 2 toward the center axis of the piston 2. The first clamping portion 41 is disposed in the first groove 51.

[0096] In the above embodiment, the first clamping portion 41 is provided on the cover plate 3 and extends toward the piston 2. The outer edge of the piston 2 is recessed toward the center axis of the piston 2 to form a first groove 51. The first clamping portion 41 is provided in the first groove 51. The first clamping portion 41 is inserted into the first groove 51 from the outer edge of the piston 2, which makes it easy to assemble the first clamping portion 41 and the first groove 51. The first clamping portion 41 is located in the first groove 51, which does not increase the outer edge size of the piston 2, maintains the flatness of the outer edge surface of the piston 2, and forms the first groove 51 from the outer edge of the piston 2 toward the center axis of the piston 2, which makes processing easy and reduces costs.

[0097] In some embodiments, the outer surface of the first clamping portion 41 is flush with the outer edge surface of the piston 2 and has a smooth transition, which maintains the flatness of the outer edge surface of the piston 2, does not increase the outer edge size of the piston 2, and has a beautiful appearance (refer to Figure 7 and Figure 8 ).

[0098] In some embodiments, the clamping member 4 further includes a second clamping portion 42 , which is disposed on the first clamping portion 41 and extends toward the central axis of the cover plate 3 , and the clamping slot 5 further includes a second slot 52 , in which the second clamping portion 42 is disposed.

[0099] In the above embodiment, the second clamping portion 42 is disposed in the second groove 52, and the piston 2 and the cover plate 3 are connected via two clamping portions and two clamping grooves, which can improve the reliability of the connection between the piston 2 and the cover plate 3 and reduce the risk of accidental falling off.

[0100] In some embodiments, the second groove 52 is in communication with the first groove 51 .

[0101] refer to Fig.11 and Fig.12In some embodiments, the second groove 52 is recessed from a side of the piston 2 adjacent to the valve body 1 toward the interior of the piston 2 .

[0102] In the above embodiment, the second groove 52 is arranged on the side of the piston 2 adjacent to the valve body 1, which is convenient for processing. The second groove 52 cooperates with the first groove 51 so that the clamping member 4 is clamped in the clamping groove 5 from the edge and bottom of the piston 2, which can improve the stability and reliability of the connection between the piston 2 and the cover plate 3 and is easy to install and disassemble.

[0103] In some embodiments, the second groove 52 is connected to the first groove 51, and the first groove 51 and the second groove 52 form a step portion 53, and the step portion 53 is adapted to the corner portion 43 formed by the second clamping portion 42 and the first clamping portion 41 (refer to Figures 15 to 17 ).

[0104] In the above embodiment, the step portion 53 formed by the first groove 51 and the second groove 52 is adapted to the corner portion 43 formed by the second clamping portion 42 and the first clamping portion 41, which can limit the clamping member 4 and reduce the risk of the clamping member 4 detaching from the clamping groove 5.

[0105] refer to Figures 15 to 17 In some embodiments, an inclined surface 44 is provided on a side of the second clamping portion 42 away from the cover plate 3 , and the inclined surface 44 is close to the cover plate 3 along a direction from the first clamping portion 41 to the central axis of the cover plate 3 .

[0106] In the above embodiment, during the process of installing the cover plate 3 to the piston 2, the cover plate 3 approaches the piston 2, and the inclined surface 44 of the second clamping portion 42 guides the second clamping portion 42 to pass through the first groove 51 and then enter the second groove 52. Due to the setting of the inclined surface 44, the second clamping portion 42 is relatively thin near the central axis of the cover plate 3. The inclined surface 44 is conducive to guiding the second clamping portion 42 to pass through the first groove 51 and then enter the second groove 52, and can also produce a small deformation, deforming toward the outside of the piston 2, and recovering the deformation after the second clamping portion 42 enters the second groove 52. The first groove 51 and the second groove 52 form a step portion 53 to limit the clamping member 4. The second clamping portion 42 is located in the second groove 52 and hooks the bottom of the second groove 52, which can improve the stability and reliability of the connection between the piston 2 and the cover plate 3.

[0107] refer to Figure 8 and Fig. 9 In some embodiments, a third groove 6 is provided on the piston 2. The third groove 6 is recessed from the side of the piston 2 adjacent to the cover plate 3 toward the inside of the piston 2. The third groove 6 is connected to the first groove 51. The third groove 6 forms a notch 61 on the edge of the piston 2.

[0108] In the above embodiment, the third groove 6 is recessed from the side of the piston 2 adjacent to the cover plate 3 toward the inside of the piston 2, and a notch 61 is formed at the edge of the piston 2. After the cover plate 3 is arranged on the piston 2, a vent hole is formed between the piston 2 and the cover plate 3 at the notch 61, allowing gas to enter between the piston 2 and the cover plate 3.

[0109] refer to Figure 7 and Fig.11 In some embodiments, a vent groove 6a may be further provided on the piston 2, and the vent groove 6a is recessed from the side of the piston 2 adjacent to the cover plate 3 toward the inside of the piston 2. The vent groove 6a allows gas to enter between the piston 2 and the cover plate 3 to achieve air pressure balance.

[0110] Of course, the first groove 51 and the second groove 52 may also be further processed on the part of the piston 2 where the ventilation groove 6 a already exists.

[0111] refer to Figure 5 and Figure 6 In some embodiments, the middle area of ​​the piston 2 is concave toward the valve body 1 , and the circumferential area of ​​the piston 2 is directly contact-connected with the cover plate 3 .

[0112] In the above embodiment, the middle area of ​​the piston 2 is concave toward the valve body 1, and components such as a magnetic sheet 7 and a waterproof breathable membrane 9 can be arranged in the concave portion of the piston 2. The circumferential area of ​​the piston 2 is directly contact-connected with the cover plate 3, which can realize the direct contact connection between the piston 2 and the cover plate 3 without affecting the arrangement of the internal components of the piston 2.

[0113] In some embodiments, the cover plate 3 is constructed as a sheet-like structure with a flat surface.

[0114] In the above embodiment, the cover plate 3 is a sheet structure with a flat surface and a simple structure. It can improve the sealing between the cover plate 3 and the piston 2, so that the cover plate 3 has waterproof and dustproof functions. In addition, the surface of the cover plate 3 is flat, which can improve the flatness and aesthetics of the appearance of the explosion-proof valve 103.

[0115] In some embodiments, a clamping member 4 is provided on the cover plate 3 , a clamping groove 5 is provided in the circumferential area of ​​the piston 2 , and the cover plate 3 and the piston 2 are connected via a matching structure formed by the clamping member 4 and the clamping groove 5 .

[0116] In the above embodiment, a snap-in groove 5 is provided in the circumferential region of the piston 2 , which will not affect the overall structural strength of the piston 2 , and the circumferential region of the piston 2 is raised relative to the middle region, which is conducive to direct contact connection with the cover plate 3 .

[0117] refer to Fig.15 and Fig.11In some embodiments, the clip 4 includes a first clip 4a and a second clip 4b that are relatively arranged, the clip groove 5 includes a first clip groove 5a and a second clip groove 5b that are relatively arranged, the first clip 4a is cooperatively connected with the first clip groove 5a, and the second clip 4b is cooperatively connected with the second clip groove 5b.

[0118] In the above embodiment, during the assembly of the cover plate 3 and the piston 2, the first clamping member 4a and the second clamping member 4b arranged opposite to each other on the cover plate 3 are respectively arranged in the first clamping groove 5a and the second clamping groove 5b arranged opposite to each other on the piston 2, so that the first clamping member 4a and the second clamping member 4b can form a structure for clamping the piston 2, so that the clamping member 4 can be in closer contact with the clamping groove 5, thereby improving the reliability and stability of the connection between the piston 2 and the cover plate 3.

[0119] In some embodiments, the clamping member 4 is disposed at the edge of the cover plate 3 and extends toward the piston 2 , and the clamping groove 5 is recessed from the outer edge of the piston 2 toward the central axis of the piston 2 .

[0120] In the above embodiment, the first clamping member 4a and the second clamping member 4b approach each other from the outer edge of the piston 2, and are respectively clamped into the first clamping groove 5a and the second clamping groove 5b, clamping the piston 2 from the outer edge of the piston 2, so that the clamping grooves 5 can be in closer contact with each other, thereby improving the reliability and stability of the connection between the piston 2 and the cover plate 3.

[0121] refer to Figure 5 and Figure 6 In some embodiments, the battery 100 further includes a magnetic sheet 7, which is disposed between the cover plate 3 and the piston 2. The magnetic sheet 7 is fixedly connected to the cover plate 3 and the piston 2, respectively.

[0122] Optionally, the magnetic sheet 7 and the cover plate 3 are bonded by an adhesive, or the magnetic sheet 7 and the cover plate 3 are connected by a snap fastener.

[0123] Optionally, the magnetic sheet 7 and the piston 2 are bonded by an adhesive, or the magnetic sheet 7 and the piston 2 are connected by a snap-fit.

[0124] Optionally, the magnetic sheet 7 includes an iron sheet.

[0125] In the above embodiment, the magnetic sheet 7 is attracted by a device equipped with a magnetic component, so that the explosion-proof valve 103 can be opened from the outside of the explosion-proof valve 103 for detection.

[0126] In some embodiments, the battery 100 further includes a waterproof and breathable membrane 9, which is disposed between the cover plate 3 and the piston 2. The waterproof and breathable membrane 9 is fixedly connected to the piston 2.

[0127] In some embodiments, the waterproof breathable membrane 9 is located between the magnetic sheet 7 and the piston 2 .

[0128] In the above embodiment, the provision of the waterproof breathable membrane 9 enables the gas on the side of the waterproof breathable membrane 9 adjacent to the piston 2 to freely exchange with the gas on the side adjacent to the cover plate 3 through the waterproof breathable membrane 9 .

[0129] In some embodiments, the battery 100 further includes a mounting ring 8. The mounting ring 8 is an annular member, and the mounting ring 8 is fixedly arranged on the piston 2. The waterproof and breathable membrane 9 covers the inside of the mounting ring 8 and is fixedly connected to the piston 2 through the mounting ring 8.

[0130] In some embodiments, an annular seat 1c is disposed in the middle of the valve body 1, a through hole 1a is disposed inside the annular seat 1c, and a middle area of ​​the piston 2 is recessed into the through hole 1a.

[0131] In some embodiments, the valve body 1 includes an extension portion 1 b , which is located on two opposite sides of the annular seat 1 c , and the extension portion 1 b is used to connect with the box body 101 of the battery 100 .

[0132] In some embodiments, the extension portion 1 b is provided with a through hole, and the through hole is used to penetrate a connecting piece to connect the valve body 1 with the box body 101 .

[0133] In some embodiments, two extensions 1b are disposed on opposite sides of the outer periphery of the through hole 1a. Each extension 1b is provided with a through hole, and the through hole is used to penetrate a connecting piece to connect the valve body 1 with the box body 101.

[0134] In some embodiments, a strip connector is provided in the through hole 1a to enhance the structural strength of the valve body 1. The strip connector divides the through hole 1a into at least two fluid channels 15. The gas in the box 101 pushes against the piston 2 through the fluid channel 15. When the gas pressure in the box 101 is greater than the opening pressure of the explosion-proof valve 103, the gas pushes the piston 2 through the fluid channel 15, so that the piston 2 is separated from the valve body 1, and the explosion-proof valve 103 is opened.

[0135] In some embodiments, the battery 100 further includes a first sealing ring 10. A first sealing groove is provided on the valve body 1. The first sealing groove is located at the periphery of the through hole 1a and adjacent to one side of the cover plate 3. The first sealing ring 10 is provided in the first sealing groove. The first sealing ring 10 is located at the abutment between the circumferential region of the piston 2 and the valve body 1. The first sealing ring 10 is used to achieve sealing between the piston 2 and the valve body 1.

[0136] In some embodiments, the battery 100 further includes a second sealing ring 11. The valve body 1 is provided with a second sealing groove, which is located at the outer periphery of the through hole 1a and adjacent to one side of the interior of the box body 101. The second sealing ring 11 is disposed in the second sealing groove. The second sealing ring 11 is used to achieve sealing between the valve body 1 and the box body 101.

[0137] In some embodiments, the battery 100 further includes a guide rod 13. The guide rod 13 is provided with a first axial hole along the axial direction, and an internal thread is provided in the first axial hole. A connecting portion 2a is provided at the portion where the piston 2 is recessed into the through hole 1a. The connecting portion 2a is provided with an external thread. The guide rod 13 is covered on the outer periphery of the connecting portion 2a, and the piston 2 is connected to the guide rod 13 through the internal thread and the external thread.

[0138] In some embodiments, the connecting portion 2a is provided with a second axial hole 2b penetrating the piston 2 in the axial direction (refer to Fig.10 and Fig.14 ).

[0139] refer to Figure 5 and Figure 6 In some embodiments, the battery 100 further includes an elastic member 12, which is sleeved on the outer periphery of the guide rod 13, and an abutment portion extending toward the outer side of the guide rod 13 is provided at one end of the guide rod 13 away from the piston 2. One end of the elastic member 12 abuts against one side of the valve body 1 adjacent to the inside of the box 101, and the other end of the elastic member 12 abuts against the abutment portion on the guide rod 13.

[0140] Optionally, the elastic member 12 includes a spring.

[0141] In some embodiments, the battery 100 further includes a protective sheath 14 , which is disposed on the outside of the elastic member 12 .

[0142] The working principle of the explosion-proof valve 103 is as follows: the connecting portion 2a of the piston 2 extends into the through hole 1a of the valve body 1 and is connected to the guide rod 13 by threads. Under normal circumstances, the elastic member 12 is in a compressed state, one end of the elastic member 12 abuts against the abutting portion of the guide rod 13, and the other end of the elastic member 12 abuts against the side of the valve body 1 adjacent to the inside of the box 101, tightening the piston 2 on the first sealing ring 10, and the first sealing ring 10 plays a sealing function. When thermal runaway occurs in the battery box, high-pressure gas impacts the piston 2 through the fluid channel 15 on the valve body 1. After the pressure reaches the threshold, the piston 2 and the guide rod 13 move upward, the piston 2 separates from the first sealing ring 10, the elastic member 12 is further compressed, and the explosion-proof valve 103 opens to release pressure, forming a rapid exhaust channel, and the gas in the box 101 can be quickly discharged to the external environment through the explosion-proof valve 103, realizing the explosion-proof function of the battery.

[0143] When the battery box 101 is exhausted and depressurized, the gas pressure difference between the inside and outside of the battery box 101 is less than the preset explosion-proof opening pressure value of the explosion-proof valve, and the piston 2 returns to the initial position under the pulling force of the elastic member 12 on the guide rod 13.

[0144] refer to Fig.18 In some other embodiments of the present application, the cover plate 3 and the piston 2 are connected by interference fit via a concave-convex matching structure 16 .

[0145] In the above embodiment, the cover plate 3 and the piston 2 are connected by interference fit through the concave-convex matching structure 16. This connection method is not only convenient for positioning during installation by utilizing the characteristics of the concave-convex combination, but also only requires the size of the convex part to be designed to be slightly larger than the size of the concave part to achieve interference fit. The structure is simple, easy to manufacture, and reduces production costs.

[0146] refer to Fig.19 and Fig. 20 In some embodiments, the concave-convex matching structure 16 includes a groove 161 provided on a side of the piston 2 adjacent to the cover plate 3, and a protrusion 162 provided on a side of the cover plate 3 adjacent to the piston 2. The protrusion 162 is provided in the groove 161 and is interference fit with the groove 161 to achieve an interference fit connection between the cover plate 3 and the piston 2.

[0147] In the above embodiment, a protrusion 162 is provided on the side of the cover plate 3 adjacent to the piston 2, and a groove 161 is provided on the side of the piston 2 adjacent to the cover plate 3. When the cover plate 3 is pressed toward the piston 2, the protrusion 162 extends into the groove 161, so that an interference fit connection between the cover plate 3 and the piston 2 can be achieved, which is convenient for installation.

[0148] In some embodiments, there are multiple grooves 161, and the multiple grooves 161 are spaced apart on the piston 2; there are multiple protrusions 162, and the multiple protrusions 162 are spaced apart on the cover plate 3; the multiple protrusions 162 correspond to the multiple grooves 161 one by one and are adapted in shape to achieve an interference fit.

[0149] In the above embodiment, the number of grooves 161 is the same as the number of protrusions 162, and their positions correspond. When the cover plate 3 is installed on the piston 2, it is ensured that each protrusion 162 can be engaged in the corresponding groove 161, and the size of each protrusion 162 is slightly larger than the size of the corresponding groove 161, so that each protrusion 162 and each groove 161 form an interference fit, further improving the tightness of the connection between the cover plate 3 and the piston 2, eliminating the potential difference between the two, and reducing the risk of electric shock.

[0150] In some embodiments, the plurality of grooves 161 are evenly distributed circumferentially on the piston 2 , and the plurality of protrusions 162 are evenly distributed circumferentially on the cover plate 3 .

[0151] In the above embodiment, the plurality of grooves 161 are distributed circumferentially on the piston 2 to form a plurality of grooves 161 distributed in an annular manner, and the protrusions 162 are distributed circumferentially on the cover plate 3. The plurality of grooves 161 can be respectively engaged with the plurality of protrusions 162 to achieve interference fit. This distribution method can improve the connection stability between the cover plate 3 and the piston 2. In addition, compared with other distribution methods, the advantage of this distribution method is that the number of grooves 161 can be the same as the number of protrusions 162, which can further improve the full contact degree between the cover plate 3 and the piston 2 and further reduce the risk of electric shock.

[0152] In some embodiments, the recessed depth of the groove 161 relative to the piston 2 is equal to the raised height of the protrusion 162 relative to the cover plate 3 .

[0153] In the above embodiment, the depth of the groove 161 is the same as the height of the protrusion 162. When the groove 161 and the protrusion 162 cooperate, on the basis of the circumferential side of the protrusion 162 being in contact with the circumferential side of the groove 161, the end surface of the protrusion 162 away from the cover plate 3 can also be made to be in contact with the bottom surface of the groove 161, thereby increasing the contact area, further improving the tightness of the connection between the cover plate 3 and the piston 2, reducing the potential difference and thus reducing the risk of electric shock.

[0154] In some embodiments, the groove 161 is disposed at the edge of the end surface of the piston 2 , and the protrusion 162 is disposed at the edge of the end surface of the cover plate 3 .

[0155] In the above embodiment, the groove 161 is arranged on the edge of the piston 2, so that the space occupied by the middle area of ​​the piston 2 can be reduced, and the circumferentially distributed grooves 161 can define a central circular area on the piston 2, which is convenient for setting other components, such as seals. Therefore, the size of the piston 2 does not need to be increased due to the additional arrangement of the groove 161, so that the overall size of the explosion-proof valve can be maintained.

[0156] In some embodiments, the groove 161 extends and penetrates the edge of the piston 2 , and the outer edge of the protrusion 162 away from the center of the cover plate 3 coincides with the edge of the cover plate 3 .

[0157] In the above embodiment, the groove 161 extends to the outer edge of the piston 2 in the radial direction of the piston 2 and penetrates the edge of the piston 2, thereby increasing the contact area between the groove 161 and the protrusion 162 without additionally increasing the size of the piston 2, further ensuring that the cover plate 3 and the piston 2 can be in close contact, reducing the potential difference, and improving the reliability of the explosion-proof valve.

[0158] In some embodiments, the cover plate 3 is made of a conductive material.

[0159] In the above embodiment, although the use of insulating materials to manufacture the cover plate 3 can reduce the risk of electric shock to a certain extent, from the perspective of processing and manufacturing, conductive materials are more advantageous than insulating materials. Conductive materials generally include metal materials and alloy materials. The use of conductive materials can ensure that the cover plate 3 has better mechanical strength and durability, and is easy to machine and improve manufacturing precision. Therefore, the explosion-proof valve provided in the embodiment of the present application not only ensures the convenience of processing and manufacturing, but also reduces or even eliminates the potential difference between the cover plate 3 and the piston 2, thereby reducing the risk of electric shock and improving the safety and reliability of the explosion-proof valve.

[0160] The following is combined with Figures 18 to 20 An explosion-proof valve provided in another specific embodiment of the present application is described in detail.

[0161] The explosion-proof valve 103 includes a valve body 1, a piston 2, a cover plate 3, a magnetic sheet 7, a mounting ring 8, a waterproof breathable membrane 9, a second sealing ring 11, an elastic member 12, a guide rod 13 and a sheath 14. The valve body 1 includes a through hole 1a, an extension 1b and an annular seat 1c. The annular seat 1c is an annular boss arranged in the middle of the valve body 1, and the extension 1b is arranged on opposite sides of the annular seat 1c. The through hole 1a is arranged on the radial inner side of the annular boss and penetrates the valve body 1 in the thickness direction. The through hole 1a is used to discharge the gas inside the battery box.

[0162] The piston 2 is movable relative to the valve body 1 along the axial direction of the valve body 1, so as to close the through hole 1a by being close to the valve body 1 or to open the through hole 1a by being away from the valve body 1. A plurality of grooves 161 are arranged at intervals on the end surface of the piston 2 facing the cover plate 3, and the plurality of grooves 161 are arranged around the center of the piston 2 at intervals. The cover plate 3 is provided with a plurality of protrusions 162, and the plurality of protrusions 162 are arranged at intervals on the end surface of the cover plate 3 facing the piston 2, and the protrusions 162 are distributed circumferentially on the cover plate 3, and the depth of the groove 161 relative to the piston 2 is equal to the height of the protrusion 162 relative to the cover plate 3, so that the plurality of grooves 161 are respectively engaged with the plurality of protrusions 162 to achieve interference fit.

[0163] The middle area of ​​the piston 2 is sunken to form a circular concave portion, and the waterproof breathable membrane 9 is laid on the bottom surface of the entire circular concave portion. The waterproof breathable membrane 9 allows the gas inside and outside the valve to be freely exchanged through the waterproof breathable membrane 9. The mounting ring 8 is used to press the waterproof breathable membrane 9, and the circumferential outer surface of the mounting ring 8 is in contact with the circumferential side of the circular concave portion to improve the tightness after assembly. The magnetic suction sheet 7 relies on the magnetic attraction between the valve body 1 to press the mounting ring 8 from the side of the mounting ring 8 close to the cover plate 3, thereby ensuring that the waterproof breathable membrane 9 is tightly attached to the circular concave portion.

[0164] The second sealing ring 11 is arranged on the end surface of the valve body 1 facing away from the cover plate 3 . After the explosion-proof valve is installed on the battery box 101 , the second sealing ring 11 is sandwiched between the valve body 1 and the surface of the box 101 . The sleeve 14 is connected to the valve body 1, and the internal space of the sleeve 14 is connected to the internal gas of the box body 101 through the connecting hole. The guide rod 13 is movably arranged in the sleeve 14. The first end of the guide rod 13 has an annular convex edge, and the second end of the guide rod 13 is fixedly connected to the piston 2. The elastic member 12 is sleeved on the outer surface of the guide rod 13, and the first end of the elastic member 12 abuts against the annular convex edge, and the second end of the elastic member 12 abuts against the valve body 1. When the box body 101 is thermally runaway, the high-pressure gas presses on the piston 2. As the pressure in the box body 101 continues to increase, the pressure eventually reaches the threshold value, and the piston 2 is lifted up. The piston 2 drives the guide rod 13 to move together, thereby squeezing the elastic member 12 to compress the elastic member 12. As the high-pressure gas leaks, the pressure in the box body 101 gradually decreases until it is less than the elastic force of the elastic member 12. At this time, the elastic member 12 resets and drives the piston 2 to reseal the through hole 1a.

[0165] Some embodiments of the present application further provide an electrical device, which includes the battery 100 in any of the above embodiments. The battery 100 is used to provide electrical energy.

[0166] The electrical device provided in the embodiment of the present application includes the battery 100 provided in any of the above embodiments, and correspondingly has the beneficial effects of the battery 100.

[0167] In the embodiment of the present application, the valve body 1, the piston 2 and the cover plate 3 are all made of conductive materials. For example, the valve body 1, the piston 2 and the cover plate 3 are all made of metal conductive materials.

[0168] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned 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 falling within the scope of the claims.

Claims

1. A battery, characterized in that: include: a housing (101), and The explosion-proof valve (103) comprises a valve body (1), a piston (2) and a cover plate (3), wherein the valve body (1) is arranged in the housing (101) and is connected to the housing (101) at an equipotential level, the piston (2) is arranged in the valve body (1), the cover plate (3) is arranged on a side of the piston (2) away from the valve body (1), and the cover plate (3) is directly contact-connected to the piston (2).

2. The battery according to claim 1, characterized in that The cover plate (3) and the piston (2) are connected via a matching structure formed by a clamping piece (4) and a clamping groove (5).

3. The battery according to claim 2, characterized in that The clamping member (4) comprises a first clamping portion (41), the first clamping portion (41) being provided on the cover plate (3) and extending towards the piston (2), the clamping groove (5) being provided on the piston (2), the clamping groove (5) comprising a first groove (51) recessed from the outer edge of the piston (2) towards the central axis of the piston (2), and the first clamping portion (41) being provided in the first groove (51).

4. The battery according to claim 3, characterized in that The clamping member (4) further comprises a second clamping portion (42), the second clamping portion (42) being arranged on the first clamping portion (41) and extending towards the central axis of the cover plate (3), and the clamping slot (5) further comprises a second slot (52), the second clamping portion (42) being arranged in the second slot (52).

5. The battery according to claim 4, characterized in that The second groove (52) is recessed from a side of the piston (2) adjacent to the valve body (1) toward the interior of the piston (2).

6. The battery according to claim 5, characterized in that The second groove (52) is communicated with the first groove (51), the first groove (51) and the second groove (52) form a step portion (53), and the step portion (53) is adapted to a corner portion (43) formed by the second clamping portion (42) and the first clamping portion (41).

7. The battery according to claim 4, characterized in that An inclined surface (44) is provided on a side of the second clamping portion (42) away from the cover plate (3), and the inclined surface (44) is close to the cover plate (3) along the direction from the first clamping portion (41) to the central axis of the cover plate (3).

8. The battery according to any one of claims 3 to 7, characterized in that: The piston (2) is provided with a third groove (6), the third groove (6) being recessed from a side of the piston (2) adjacent to the cover plate (3) toward the interior of the piston (2), and the third groove (6) being communicated with the first groove (51), the third groove (6) forming a notch (61) on the edge of the piston (2).

9. The battery according to claim 1, characterized in that The middle region of the piston (2) is concave toward the valve body (1), and the circumferential region of the piston (2) is directly contact-connected to the cover plate (3).

10. The battery according to claim 9, characterized in that The cover plate (3) is constructed as a sheet-like structure with a flat surface.

11. The battery according to claim 9 or 10, characterized in that: A clamping piece (4) is provided on the cover plate (3), a clamping groove (5) is provided in the circumferential area of ​​the piston (2), and the cover plate (3) and the piston (2) are connected via a matching structure formed by the clamping piece (4) and the clamping groove (5).

12. The battery according to any one of claims 2 to 7, characterized in that: The clamping member (4) comprises a first clamping member (4a) and a second clamping member (4b) which are arranged opposite to each other, and the clamping slot (5) comprises a first clamping slot (5a) and a second clamping slot (5b) which are arranged opposite to each other, the first clamping member (4a) is connected in a matching manner with the first clamping slot (5a), and the second clamping member (4b) is connected in a matching manner with the second clamping slot (5b).

13. The battery according to claim 12, characterized in that The clamping member (4) is arranged on the edge of the cover plate (3) and extends towards the piston (2); the clamping groove (5) is recessed from the outer edge of the piston (2) towards the central axis of the piston (2).

14. The battery according to claim 1, characterized in that The cover plate (3) and the piston (2) are connected by interference fit via a concave-convex fitting structure (16).

15. The battery according to claim 14, characterized in that The concave-convex matching structure (16) comprises a concave groove (161) provided on a side of the piston (2) adjacent to the cover plate (3), and a convex block (162) provided on a side of the cover plate (3) adjacent to the piston (2); the convex block (162) is provided in the concave groove (161) and is interference-fitted with the concave groove (161) to achieve an interference-fit connection between the cover plate (3) and the piston (2).

16. The battery according to claim 15, characterized in that The number of the grooves (161) is multiple, and the multiple grooves (161) are spaced apart on the piston (2); the number of the protrusions (162) is multiple, and the multiple protrusions (162) are spaced apart on the cover plate (3); the multiple protrusions (162) and the multiple grooves (161) correspond one to one and have matching shapes to achieve an interference fit.

17. The battery according to claim 15, characterized in that The recessed depth of the groove (161) relative to the piston (2) is equal to the raised height of the projection (162) relative to the cover plate (3).

18. The battery according to claim 15, characterized in that The groove (161) is arranged at the edge of the end surface of the piston (2), and the convex block (162) is arranged at the edge of the end surface of the cover plate (3).

19. The battery according to claim 18, characterized in that The groove (161) extends and penetrates the edge of the piston (2), and the outer edge of the protrusion (162) away from the center of the cover plate (3) coincides with the edge of the cover plate (3).

20. An electrical device, characterized in that: Comprising a battery according to any one of claims 1 to 19.

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