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, the valve body comprises a connecting part connected with the box body, the connecting part comprises a contact surface in direct contact with the box body, and the contact surface has conductivity, so that the anti-explosion valve is electrically connected with the box body through the contact surface. In the embodiment, the valve body is provided with the contact surface which is in direct contact with the box body, and the contact surface has conductivity, so that the explosion-proof valve can be electrically connected with the box body through the contact surface, equipotential connection between the explosion-proof valve and the box body is realized, the potential difference between the explosion-proof valve and the box body is reduced, a human body cannot become a path between high voltage and low voltage, and the safety of the human body is improved. Therefore, the occurrence of electric shock accidents is reduced.

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 a box and an explosion-proof valve. The explosion-proof valve is arranged on the box. When the explosion-proof valve is lifted and opened by high-pressure gas, the high-temperature gas in the battery box can be discharged. Since the explosion-proof valve is arranged on the box, there may be a potential difference, which will cause a risk of electric shock. 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, including a valve body, the valve body including a connecting portion connected to the box body, the connecting portion including a contact surface directly in contact with the box body, the contact surface having conductivity, so that the explosion-proof valve is electrically connected to the box body through the contact surface.

[0005] In the above embodiment, the valve body has a contact surface that is in direct contact with the housing, and the contact surface is conductive, so that the explosion-proof valve can be electrically connected to the housing through the contact surface, thereby achieving equipotential connection between the explosion-proof valve and the housing, reducing the potential difference between the explosion-proof valve and the housing, and preventing the human body from becoming a path between high voltage and low voltage, thereby reducing the occurrence of electric shock accidents.

[0006] In some embodiments, the explosion-proof valve further includes a piston, the valve body includes a recessed portion, the piston is disposed in the recessed portion, and an outer periphery of the recessed portion is connected to the connecting portion.

[0007] In the above embodiment, the recessed portion of the valve body is used to arrange components such as a piston to achieve an explosion-proof function, and the connecting portion of the valve body is used to achieve the connection between the explosion-proof valve and the housing. The connecting portion is connected to the outer periphery of the recessed portion, which will not affect the installation of components such as a piston that achieves the explosion-proof function, and can achieve the connection between the valve body and the housing.

[0008] In some embodiments, the battery further comprises a cover plate, which is disposed on a side of the piston away from the box body and covers the piston, and the cover plate is made of insulating material.

[0009] In the above embodiment, the cover plate is arranged on the side of the piston away from the box body, and is used to protect the piston and other components arranged in the valve body, such as waterproofing and dustproofing. By adjusting and adding a cover plate made of insulating material on the outer surface of the piston structure that can be directly contacted by the human body, the surface insulation of the piston can be achieved, ensuring the safety of personnel.

[0010] In some embodiments, the piston and the cover plate are bonded together by an adhesive.

[0011] In the above embodiment, the adhesive member is made of insulating material, and the piston and the cover plate are bonded by the adhesive member, which can prevent the operator from accidentally touching the piston and causing electric shock accidents.

[0012] In some embodiments, a texture structure is provided on the side where the piston is bonded to the cover plate.

[0013] In the above embodiment, a texture structure is provided on the side where the piston and the cover plate are bonded, so as to enhance the connection strength between the piston and the cover plate.

[0014] In some embodiments, the outer periphery of the recessed portion is integrally extended outward to form at least two connecting portions.

[0015] In the above embodiment, the recess and the connection part are integrated, and no additional components are required to connect the explosion-proof valve to the box body, which has a simple structure and is easy to operate. At least two connection parts are provided in the circumference of the recess, which can improve the connection strength between the explosion-proof valve and the box body.

[0016] In some embodiments, the battery further includes a connector, the connector portion is provided with a through hole, and the connector is passed through the through hole to connect the connector portion and the box body.

[0017] In the above embodiment, a through hole is provided in the connecting portion, and a connecting member is passed through the through hole to connect the box body and the connecting portion, so that the connecting operation is convenient.

[0018] In some embodiments, an insulating layer is provided on the surface of the connecting portion that is not in contact with the box body.

[0019] In the above embodiment, the surface of the connection part that is not in contact with the box body is provided with an insulating layer, which can prevent people from getting electric shock when in contact with it.

[0020] In some embodiments, the insulating layer is an anodized layer.

[0021] In the above embodiment, the anodized layer has a relatively high resistivity, can effectively isolate the current, prevent short circuit and leakage, and improve the insulation of the surface of the connection part that is not in contact with the box body.

[0022] Some embodiments of the present application also provide an electrical device, which includes the above-mentioned battery.

[0023] 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.

[0024] Based on the above technical solution, this application has at least the following beneficial effects:

[0025] In the above embodiment, the valve body has a contact surface that is in direct contact with the housing, and the contact surface is conductive, so that the explosion-proof valve can be electrically connected to the housing through the contact surface, thereby achieving equipotential connection between the explosion-proof valve and the housing, reducing the potential difference between the explosion-proof valve and the housing, and preventing the human body from becoming a path between high voltage and low voltage, thereby reducing the occurrence of electric shock accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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.

[0027] Figure 1 is a schematic structural diagram of a vehicle disclosed in some embodiments of the present application;

[0028] Figure 2 is a schematic diagram of an exploded structure of a battery disclosed in some embodiments of the present application;

[0029] Figure 3 is a schematic diagram of an explosion-proof valve disclosed in some embodiments of the present application;

[0030] Figure 4 is a bottom view schematic diagram of an explosion-proof valve disclosed in some embodiments of the present application;

[0031] Figure 5 is a schematic top view of an explosion-proof valve disclosed in some embodiments of the present application;

[0032] Figure 6 yes Figure 5 AA cross-sectional view of ;

[0033] Figure 7 It is a schematic diagram of the piston open state of an explosion-proof valve disclosed in some embodiments of the present application.

[0034] In the drawings, the drawings are not drawn to scale.

[0035] Marking description: 1-valve body; 11-connecting part; 111-contact surface; 112-insulating layer; 12-recess; 13-through hole; 14-strip connector; 15-fluid channel; 2-piston; 21-texture structure; 22-extension part; 3-cover plate; 4-magnetic sheet; 5-first sealing ring; 6-second sealing ring; 7-elastic member; 8-guide rod; 9-sheath;

[0036] 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

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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 .

[0046] Please refer to Figure 2 , Figure 2Schematic diagram of the exploded structure of the battery 100 provided in some embodiments of the present application. The battery 100 includes a box body 101 and a battery cell 102, and the battery cell 102 is contained in the box body 101. The box body 101 includes a first box body 101a and a second box body 101b, and the first box body 101a and the second box body 101b cover each other, and the first box body 101a and the second box body 101b jointly define a storage space for accommodating the battery cell 102. The second box body 101b can be a hollow structure with one end open, and the first box body 101a can be a plate-like structure, and the first box body 101a covers the open side of the second box body 101b, so that the first box body 101a and the second box body 101b jointly define a storage space; the first box body 101a and the second box body 101b can also be hollow structures with one side open, and the open side of the first box body 101a covers the open side of the second box body 101b. Of course, the box body 101 formed by the first box body 101a and the second box body 101b can be in various shapes, such as a cylinder or a cuboid.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] Since the batteries used in new energy electric vehicles are the energy storage systems of all pure electric vehicles and plug-in hybrid electric vehicles, in order to increase safety, metal parts that people can directly contact usually need to adopt equipotential design. And because the explosion-proof valve is set on the battery box, the box is generally made of conductive metal materials, so there may be a potential difference on the explosion-proof valve, which will cause safety hazards.

[0051] Based on this, in order to alleviate the problem of safety hazards 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 explosion-proof valve 103 has a contact surface 111 that is in direct contact with the box body 101, and the contact surface 111 is conductive, so that the explosion-proof valve 103 is electrically connected to the box body 101 through the contact surface 111, thereby reducing the potential difference between the explosion-proof valve 103 and the box body 101, alleviating the risk of electric shock caused by the potential difference, and improving the safety of the battery 100.

[0052] The battery disclosed in the embodiment of the present application can be used in electrical devices such as new energy electric vehicles, thereby improving the battery safety of the electrical devices.

[0053] In some embodiments of the present application, reference Figure 3 and Figure 4 The battery includes a box body 101 and an explosion-proof valve 103 .

[0054] The explosion-proof valve 103 includes a valve body 1 , which includes a connecting portion 11 connected to the box body 101 , and the connecting portion 11 includes a contact surface 111 in contact with the box body 101 . The contact surface 111 is conductive so that the explosion-proof valve 103 is electrically connected to the box body 101 through the contact surface 111 .

[0055] In the above embodiment, the valve body 1 has a contact surface 111 that is in direct contact with the box body 101. The contact surface 111 is conductive, and the explosion-proof valve 103 can be electrically connected to the box body 101 through the contact surface 111, so as to achieve equipotential connection between the explosion-proof valve 103 and the box body 101, thereby reducing the potential difference between the explosion-proof valve 103 and the box body 101, so that the human body will not become a path between high voltage and low voltage, thereby reducing the occurrence of electric shock accidents. Compared with achieving equipotential connection between the valve body and the box body through a wire, the embodiment of the present application can increase the flow area and meet the project requirements.

[0056] In the above embodiment, the connection portion 11 includes the contact surface 111 in contact with the box body 101 , which means that the contact surface 111 of the connection portion 11 is in direct contact with the box body 101 , and there is no other component between the contact surface 111 and the box body 101 .

[0057] In the above embodiment, the valve body 1 is usually made of conductive materials such as metal, such as steel or aluminum. The exposed surface of the explosion-proof valve 103 is generally insulated to reduce the occurrence of electric shock accidents. Optionally, the exposed surface of the explosion-proof valve 103 is anodized to form an oxide layer to achieve insulation.

[0058] In some embodiments, the contact surface 111 is not anodized, or the contact surface 111 and other exposed surfaces of the explosion-proof valve are anodized to form an oxide layer, and then the oxide layer of the contact surface 111 is removed to maintain the conductivity of the contact surface 111.

[0059] 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.

[0060] In some embodiments, a mounting hole is provided on the box body 101, and the mounting hole communicates the inside and the outside of the box body 101. A part of the explosion-proof valve 103 is provided in the mounting hole, and another part of the explosion-proof valve 103 is located outside the mounting hole. The explosion-proof valve 103 is fixedly connected to the outer peripheral part of the mounting hole through the connecting portion 11 of the valve body 1.

[0061] refer to Figures 5 to 7 In some embodiments, the explosion-proof valve 103 further includes a piston 2 , the valve body 1 includes a recess 12 , the piston 2 is disposed in the recess 12 , and the outer periphery of the recess 12 is connected to the connecting portion 11 .

[0062] In the above embodiments, reference Figure 6 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. Figure 7 When the thermal runaway explosion-proof valve 103 in the box body 101 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.

[0063] When the internal pressure of the battery 100 is normal, the contact surface of the piston 2 and the valve body 1 can be conductive, realizing equipotential connection to prevent the potential difference between the various components of the explosion-proof valve 103, 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 personal safety.

[0064] In the above embodiment, the recess 12 of the valve body 1 is used to set the piston 2 and other components to achieve the explosion-proof function, and the connecting portion 11 of the valve body 1 is used to realize the connection between the explosion-proof valve 103 and the box body 101. The connecting portion 11 is connected to the outer periphery of the recess 12, which will not affect the installation of the piston 2 and other components that realize the explosion-proof function, and can realize the connection between the valve body 1 and the box body 101.

[0065] In some embodiments, the outer periphery of the recess 12 integrally extends outward to form the connecting portion 11 .

[0066] In the above embodiment, the recessed portion 12 and the connecting portion 11 are integrated into one body, and no additional components are required to connect the explosion-proof valve 103 to the box body 101, which has a simple structure and is easy to operate.

[0067] In some embodiments, at least two connecting portions 11 are disposed around the recess 12 .

[0068] In the above embodiment, at least two connecting portions 11 are provided in the circumferential direction of the recess 12 , which can improve the connection strength between the explosion-proof valve 103 and the box body 101 .

[0069] In some embodiments, the at least two connection portions 11 include two groups of connection portions 11 disposed opposite to each other, and each group of connection portions 11 includes two connection portions 11 .

[0070] In the above embodiment, the two groups of connection parts 11 are arranged opposite to each other, which can balance the force between the explosion-proof valve 103 and the box body 101. Each group of connection parts 11 includes two connection parts 11, and the two connection parts 11 are arranged at intervals, which can improve the connection strength and connection stability between the explosion-proof valve 103 and the box body 101.

[0071] In some embodiments, the battery further includes a connector, the connecting portion 11 is provided with a through hole 13 , and the connector passes through the through hole 13 to connect the box body 101 and the connecting portion 11 .

[0072] In some embodiments, the connecting member includes a rivet screw or a bolt, etc. The through hole 13 is a locking hole.

[0073] In the above embodiment, by providing a through hole 13 in the connecting portion 11 and the connecting member passing through the through hole 13 to connect the box body 101 and the connecting portion 11 , the connecting operation is convenient.

[0074] In the above embodiment, the contact surface 111 is located on the connecting portion 11 where the through hole 13 is located, and the contact surface 111 is in contact with the box body 101 . The contact surface 111 can maintain the conductive property of the raw material.

[0075] In some embodiments, the explosion-proof valve 103 is fixedly connected to the battery box 101 through four through holes 13 on the valve body 1 using connecting members such as rivet screws or bolts.

[0076] In some embodiments, an insulating layer 112 is disposed on the surface of the connection portion 11 that is not in contact with the box body 101 .

[0077] In the above embodiment, the surface of the connection portion 11 that is not in contact with the box body 101 is provided with an insulating layer 112 to prevent people from getting electric shock when in contact with the connection portion 11 .

[0078] In the above embodiment, the battery box 101 is made of steel or aluminum. The outer surface of the entire explosion-proof valve 103 is insulated, and there is a potential difference. In order to reduce the potential difference, the contact surface 111 where the explosion-proof valve 103 contacts the box 101 is not insulated, so that the contact surface 111 has a conductive function to reduce the potential difference.

[0079] In some embodiments, the insulating layer 112 is an anodized layer.

[0080] In the above embodiment, the anodized layer has a relatively high resistivity, which can effectively isolate the current, prevent short circuit and leakage, and improve the insulation of the surface of the connection portion 11 that is not in contact with the box body 101 .

[0081] In some embodiments, the battery further includes a cover plate 3 , which is disposed on a side of the piston 2 away from the box body 101 and covers the piston 2 .

[0082] In the above embodiment, the cover plate 3 is disposed on the side of the piston 2 away from the box body 101, and is used to protect the piston 2 and other components disposed in the valve body 1, such as waterproofing and dustproofing.

[0083] In some embodiments, the cover plate 3 is constructed as a sheet-like structure with a flat surface.

[0084] 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.

[0085] In some embodiments, the cover plate 3 is made of insulating material.

[0086] In the above embodiment, a cover plate 3 made of insulating material is adjusted and added to the outer surface of the piston structure that can be directly contacted by the human body, so that the surface insulation of the piston 2 can be achieved, thereby ensuring the safety of personnel.

[0087] In some embodiments, the piston 2 and the cover plate 3 are bonded together by adhesive.

[0088] In the above embodiment, the adhesive member is made of insulating material, and the piston 2 and the cover plate 3 are bonded by the adhesive member, which can prevent the operator from accidentally touching the cover plate and causing electric shock accidents.

[0089] In some embodiments, a texture structure 21 is provided on the side where the piston 2 and the cover plate 3 are bonded.

[0090] In the above embodiment, a texture structure 21 is provided on the side where the piston 2 and the cover plate 3 are bonded, so as to enhance the connection strength between the piston 2 and the cover plate 3 .

[0091] In the above embodiment, the texture structure 21 includes a CD texture structure.

[0092] refer to Figure 6 and Figure 7 In some embodiments, the battery 100 further includes a magnetic sheet 4, which is disposed between the cover plate 3 and the piston 2. The magnetic sheet 4 is fixedly connected to the cover plate 3 and the piston 2, respectively.

[0093] Optionally, the magnetic sheet 4 and the cover plate 3 are bonded by an adhesive, or the magnetic sheet 4 and the cover plate 3 are connected by a snap fastener.

[0094] Optionally, the magnetic sheet 4 and the piston 2 are bonded together by an adhesive, or the magnetic sheet 4 and the piston 2 are connected by a snap fit.

[0095] Optionally, the magnetic sheet 4 includes an iron sheet.

[0096] In the above embodiment, the magnetic sheet 4 is attracted by using 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.

[0097] In some embodiments, a center hole is set in the recess 12 of the valve body 1, an extension portion 22 is set in the middle area of ​​the piston 2, the extension portion 22 is inserted into the center hole, the circumferential area of ​​the piston 2 is located outside the center hole, and the circumferential area of ​​the piston 2 is in contact with the outer peripheral part of the center hole of the valve body 1.

[0098] In some embodiments, the concave portion 12 of the valve body 1 includes at least two strip-shaped connecting members 14, and the at least two strip-shaped connecting members 14 divide the concave portion 12 into at least two fluid channels 15. The gas in the box 101 pushes against the piston 2 through the fluid channel 15, and when the gas pressure in the box 101 is greater than the opening pressure of the explosion-proof valve 103, the gas flow 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.

[0099] In some embodiments, the battery 100 further includes a first sealing ring 5. A first sealing groove is provided on the valve body 1. The first sealing groove is located at the outer periphery of the recess 12 and adjacent to one side of the cover plate 3. The first sealing ring 5 is provided in the first sealing groove. The first sealing ring 5 is located at the abutment between the circumferential region of the piston 2 and the valve body 1. The first sealing ring 5 is used to achieve sealing between the piston 2 and the valve body 1.

[0100] In some embodiments, the battery 100 further includes a second sealing ring 6. The valve body 1 is provided with a second sealing groove, which is located at the outer periphery of the recess 12 and adjacent to one side of the interior of the box body 101. The second sealing ring 6 is disposed in the second sealing groove. The second sealing ring 6 is used to achieve sealing between the valve body 1 and the box body 101.

[0101] In some embodiments, the battery 100 further includes a guide rod 8. The guide rod 8 is provided with a first axial hole in the axial direction, and an internal thread is provided in the first axial hole. The extension portion 22 of the piston 2 is provided with an external thread. After the extension portion 22 is inserted into the central hole of the recess 12, the guide rod 8 extends into the central hole, and the cover is provided on the outer periphery of the extension portion 22, and the internal thread of the guide rod 8 is connected with the external thread of the extension portion 22.

[0102] In some embodiments, the battery 100 further includes an elastic member 7, which is sleeved on the outer periphery of the guide rod 8, and an end of the guide rod 8 away from the piston 2 is provided with an abutment portion extending toward the outside of the guide rod 8. One end of the elastic member 7 abuts against a side of the valve body 1 adjacent to the inside of the box 101, and the other end of the elastic member 7 abuts against the abutment portion on the guide rod 8.

[0103] Optionally, the elastic member 7 includes a spring.

[0104] In some embodiments, the battery 100 further includes a protective sheath 9 , which is disposed on the outside of the elastic member 7 .

[0105] The working principle of the explosion-proof valve 103 is as follows: the piston 2 is located in the recess 12 of the valve body 1, the extension 22 of the piston 2 extends into the central hole of the recess 12, and is connected to the guide rod 8 by threads. Under normal circumstances, the elastic member 7 is in a compressed state, one end of the elastic member 7 abuts against the abutment of the guide rod 8, and the other end of the elastic member 7 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 5, and the first sealing ring 5 plays a sealing function. When thermal runaway occurs in the box 101 of the battery, 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 8 move upward, the piston 2 separates from the first sealing ring 5, the elastic member 7 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.

[0106] When the box body 101 has completed exhaust and pressure relief, the gas pressure difference between the inside and outside of the box body 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 7 on the guide rod 8.

[0107] Some embodiments of the present application further provide an electrical device, which includes the battery 100 in any of the above embodiments.

[0108] 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.

[0109] In the embodiment of the present application, the valve body 1 and the piston 2 are both made of conductive materials. For example, the valve body 1 and the piston 2 are both made of metallic conductive materials.

[0110] 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 An explosion-proof valve (103) comprises a valve body (1), the valve body (1) comprising a connecting portion (11) connected to the box body (101), the connecting portion (11) comprising a contact surface (111) in direct contact with the box body (101), the contact surface (111) being conductive so that the explosion-proof valve (103) is electrically connected to the box body (101) via the contact surface (111).

2. The battery according to claim 1, characterized in that The explosion-proof valve (103) further comprises a piston (2); the valve body (1) comprises a recess (12); the piston (2) is arranged in the recess (12); and the outer periphery of the recess (12) is connected to the connecting portion (11).

3. The battery according to claim 2, characterized in that The battery further comprises a cover plate (3), the cover plate (3) being arranged on a side of the piston (2) away from the box body (101) and covering the piston (2), and the cover plate (3) being made of insulating material.

4. The battery according to claim 3, characterized in that The piston (2) and the cover plate (3) are bonded together by means of an adhesive.

5. The battery according to claim 4, characterized in that A texture structure (21) is provided on the side of the piston (2) bonded to the cover plate (3).

6. The battery according to any one of claims 2 to 5, characterized in that: The outer periphery of the recess (12) extends outwards to integrally form at least two connecting portions (11).

7. The battery according to claim 6, characterized in that The battery further comprises a connecting piece, the connecting portion (11) is provided with a through hole (13), and the connecting piece is passed through the through hole (13) to connect the connecting portion (11) and the box body (101).

8. The battery according to claim 1, characterized in that An insulating layer (112) is provided on the surface of the connection portion (11) that is not in contact with the box body (101).

9. The battery according to claim 8, characterized in that The insulating layer (112) is an anodized layer.

10. An electrical device, characterized in that: Comprising a battery according to any one of claims 1 to 9.

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