Explosion-proof valve, battery and electric device

Abstract

The invention discloses an anti-explosion valve, a battery and an electric device, and belongs to the technical field of batteries. The explosion-proof valve comprises a valve body forming a pressure relief channel; the valve element is installed on the valve body and provided with a ventilation channel communicated with the pressure relief channel; the waterproof breathable film is installed on the valve element, and the breathable channel is communicated with the outside through the waterproof breathable film; the electromagnetic assembly is arranged opposite to the valve element and used for magnetically attracting the valve element in the power-on state so that the valve element can seal the pressure relief channel. Through the arrangement of the magnetic assembly, the problem that a spring type anti-explosion valve is prone to being opened abnormally under the low-elastic-force design is solved, the sealing performance of the anti-explosion valve in the normal state is improved, the reliability of the anti-explosion valve is improved, and the problem that the spring type anti-explosion valve cannot be opened normally under the high-elastic-force design is solved; therefore, the explosion-proof valve can quickly reach the maximum pressure relief area during thermal diffusion, and the exhaust rate of the explosion-proof valve during thermal runaway of the battery is increased.

Description

Technical Field

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

[0002] As an important safety component of the battery, the explosion-proof valve is a core indicator for measuring the performance of the explosion-proof valve. Whether the explosion-proof valve can quickly discharge the high-pressure gas in the battery box in a short time when the battery is thermally runaway has become a core indicator for measuring the performance of the explosion-proof valve. In related technologies, explosion-proof valves usually use the elastic force of the spring to achieve the sealing function under normal conditions. However, the existing spring-type explosion-proof valves have the problem of being easily opened by mistake due to low elastic force and being difficult to open normally due to high elastic force, which reduces the reliability of the explosion-proof valve. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an explosion-proof valve, a battery and an electrical device, which improve the sealing performance of the explosion-proof valve under normal conditions, enhance the reliability of the explosion-proof valve, achieve more efficient and direct exhaust, and accelerate the exhaust rate of the explosion-proof valve when the battery is under thermal runaway.

[0004] In a first aspect, the present application provides an explosion-proof valve, applied to a battery, comprising:

[0005] The valve body forms a pressure relief passage;

[0006] A valve core is installed on the valve body and has a venting passage communicating with the pressure relief passage;

[0007] A waterproof breathable membrane is installed on the valve core, and the breathable passage is connected with the outside world through the waterproof breathable membrane;

[0008] The electromagnetic component is arranged opposite to the valve core and is used for magnetically attracting the valve core in a power-on state so that the valve core seals the pressure relief channel.

[0009] According to the explosion-proof valve of the present application, through the arrangement of the above-mentioned magnetic component, it is achieved that under normal conditions, the magnetic component magnetically attracts the valve core to seal the pressure relief channel and only uses the air permeable channel to balance the internal and external pressure differences, thereby solving the problem that the spring-type explosion-proof valve is prone to abnormal opening when subjected to external disturbances under a low elastic force design, significantly improving the sealing performance of the explosion-proof valve under normal conditions, thereby improving the reliability of the explosion-proof valve, and at the same time achieving the magnetic force to release the opening of the pressure relief channel under a thermal runaway state of the battery to help quickly and massively discharge high-temperature and high-pressure gases, thereby solving the problem that the spring-type explosion-proof valve cannot open normally under a high elastic force design, allowing the explosion-proof valve to reach the maximum pressure relief area faster during heat diffusion, achieving more efficient and direct exhaust, and accelerating the exhaust rate of the explosion-proof valve during thermal runaway of the battery, thereby effectively optimizing the safety protection performance of the battery.

[0010] According to one embodiment of the present application, the valve core includes:

[0011] A guide rod is installed in the pressure relief channel to form the air permeable channel;

[0012] The pressure cover is connected to the end of the guide rod away from the electromagnetic assembly and is configured to press the valve body to seal the pressure relief channel when the electromagnetic assembly is energized.

[0013] According to an embodiment of the present application, the guide rod includes a main rod body and a magnetic member, the magnetic member is made of a paramagnetic material, and the magnetic member is installed at one end of the main rod body close to the electromagnetic assembly.

[0014] According to an embodiment of the present application, the main rod body is provided with a first installation groove facing the electromagnetic assembly, and the magnetic member is installed in the first installation groove.

[0015] According to an embodiment of the present application, the magnetic member is an annular structure, and the center line of the magnetic member coincides with the center line of the valve core.

[0016] According to an embodiment of the present application, the guide rod is made of paramagnetic material.

[0017] According to one embodiment of the present application, the electromagnetic component includes:

[0018] An electromagnet is disposed in the valve body;

[0019] A suction cup is disposed in the valve body and connected to the electromagnet, and is used to block the air passage when the electromagnet is energized, and is provided with a first exhaust hole for connecting the pressure relief passage and the air passage.

[0020] According to one embodiment of the present application, the explosion-proof valve further includes:

[0021] A protective cover is disposed in the valve body and forms a first cavity connected to the pressure relief channel and the first exhaust hole. The protective cover is connected to the valve body, the electromagnet passes through the protective cover, and the suction cup is disposed in the first cavity.

[0022] According to one embodiment of the present application, the valve body includes:

[0023] A main body portion, forming the pressure relief channel;

[0024] The reinforcement structure is connected to the inner wall of the main body, sleeved on the valve core, and connected to the protective cover.

[0025] According to one embodiment of the present application, the explosion-proof valve further includes:

[0026] The elastic member is sleeved on the valve core and elastically connected between the valve core and the valve body.

[0027] According to one embodiment of the present application, the explosion-proof valve further includes:

[0028] A pressure ring, a second installation groove is provided on the side of the valve core away from the electromagnetic assembly, the waterproof breathable membrane and the pressure ring are installed in the second installation groove, and the pressure ring is used to press the waterproof breathable membrane against the valve core.

[0029] According to an embodiment of the present application, a boss is provided on the bottom wall of the second mounting groove, the waterproof breathable membrane is fixedly connected to the boss, and the edge of the waterproof breathable membrane is clamped between the pressure ring and the boss.

[0030] According to one embodiment of the present application, the explosion-proof valve further includes:

[0031] A valve cover is connected to the valve core to form a second cavity connected to the air permeable channel, a third cavity and a pressure relief port connected to the third cavity are formed between the valve cover and the valve body, and the valve cover is provided with a second exhaust hole for connecting the second cavity and the third cavity.

[0032] According to one embodiment of the present application, the explosion-proof valve further includes:

[0033] The valve member is installed in the valve core to block the air permeable channel. The valve member forms a flow guide channel and a flow gap, and is configured to open the flow gap when a pressure difference occurs on both sides to make the two sides of the air permeable channel communicate with the air permeable channel.

[0034] According to one embodiment of the present application, the explosion-proof valve further includes:

[0035] a first sealing member, elastically compressed between the valve core and the valve body;

[0036] According to one embodiment of the present application, the explosion-proof valve further includes:

[0037] The second sealing member is used for being elastically compressed between the battery box and the valve body.

[0038] In a second aspect, the present application provides a battery, the battery comprising:

[0039] Box;

[0040] A plurality of battery cells are contained in the box;

[0041] Any explosion-proof valve as described above is installed in the box.

[0042] According to the battery of the present application, through the setting of the above-mentioned explosion-proof valve, it is achieved that under normal conditions, the magnetic component magnetically attracts the valve core to seal the pressure relief channel and only uses the air permeable channel to balance the internal and external pressure differences, which solves the problem that the spring-type explosion-proof valve is prone to abnormal opening when subjected to external disturbances under a low elastic force design, significantly improves the sealing performance of the explosion-proof valve under normal conditions, thereby improving the reliability of the explosion-proof valve, and at the same time, it is achieved that the magnetic force releases the opening of the pressure relief channel under thermal runaway of the battery to help quickly and massively discharge high-temperature and high-pressure gases, which solves the problem that the spring-type explosion-proof valve cannot open normally under a high elastic force design, so that the explosion-proof valve can reach the maximum pressure relief area faster during heat diffusion, achieving more efficient and direct exhaust, and accelerating the exhaust rate of the explosion-proof valve during thermal runaway of the battery, thereby effectively optimizing the safety protection performance of the battery.

[0043] According to one embodiment of the present application, the battery further includes:

[0044] A control system is electrically connected to the electromagnetic assembly of the explosion-proof valve and the plurality of battery cells, and is used to cut off power supply to the electromagnetic assembly when thermal runaway of the battery cells is detected.

[0045] In a third aspect, the present application provides an electrical device, the electrical device comprising:

[0046] As above mentioned battery.

[0047] According to the electrical device of the present application, through the arrangement of the above-mentioned battery, it is achieved that under normal conditions, the magnetic valve core of the magnetic component seals the pressure relief channel and only uses the air permeable channel to balance the internal and external pressure differences, which solves the problem that the spring-type explosion-proof valve is prone to abnormal opening when subjected to external disturbances under a low elastic force design, significantly improves the sealing performance of the explosion-proof valve under normal conditions, thereby improving the reliability of the explosion-proof valve, and at the same time, it is achieved that the magnetic force releases the opening of the pressure relief channel under a thermal runaway state of the battery to help quickly and massively discharge high-temperature and high-pressure gases, which solves the problem that the spring-type explosion-proof valve cannot open normally under a high elastic force design, so that the explosion-proof valve can reach the maximum pressure relief area faster during heat diffusion, achieving more efficient and direct exhaust, and accelerating the exhaust rate of the explosion-proof valve during thermal runaway of the battery, thereby effectively optimizing the safety protection performance of the battery.

[0048] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0050] Figure 1 This is one of the structural schematic diagrams of the explosion-proof valve provided in the embodiment of the present application;

[0051] Figure 2 This is the second structural schematic diagram of the explosion-proof valve provided in the embodiment of the present application;

[0052] Figure 3 It is a structural explosion diagram of the explosion-proof valve provided in an embodiment of the present application;

[0053] Figure 4 is a cross-sectional view of an explosion-proof valve provided in an embodiment of the present application;

[0054] Figure 5 is a schematic diagram of the structure of the electromagnetic assembly provided in an embodiment of the present application;

[0055] Figure 6 is a cross-sectional view of an electromagnetic assembly provided in an embodiment of the present application;

[0056] Figure 7 It is a schematic diagram of the structure of the valve body provided in an embodiment of the present application.

[0057] Reference numerals:

[0058] Explosion-proof valve 10;

[0059] Valve body 11, main body 111, pressure relief channel 1111, reinforcement structure 112;

[0060] Valve core 12, guide rod 121, main rod body 1211, air permeable channel 12111, magnetic member 1212, gland 122, boss 1221;

[0061] Electromagnetic assembly 13, electromagnet 131, iron core 1311, coil 1312, suction cup 132, first exhaust hole 1321;

[0062] Protective cover 14, first cavity 141,

[0063] Valve cover 15, second exhaust hole 151;

[0064] Valve member 16, flow guide channel 161, flow slot 162;

[0065] Waterproof breathable membrane 17, elastic member 18, pressure ring 19;

[0066] A second cavity 21, a third cavity 22, and a pressure relief port 23;

[0067] A first sealing member 24 and a second sealing member 25 . DETAILED DESCRIPTION

[0068] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0069] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0070] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0071] The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor, a controller and a battery can be arranged inside the vehicle, and the controller is used to control the battery to power the motor. For example, a battery can be arranged at the bottom, front or rear of the vehicle. The battery can be used to power the vehicle. For example, the battery can be used as an operating power source for the vehicle and for the circuit system of the vehicle, for example, for the working power requirements during the start-up, navigation and operation of the vehicle. In another embodiment of the present application, the battery can not only be used as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0072] The battery provided in the present application can also be applied to an energy storage system, which includes one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple batteries, and the multiple batteries are connected in series through a busbar to increase the voltage of the energy storage system. When the energy storage system includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage system.

[0073] Energy storage systems can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems or temporary power supply systems. Energy storage systems can store electrical energy as needed and output it at the appropriate time. For example, energy storage systems can store electrical energy when electricity consumption is low, and provide electricity to relevant users or electrical equipment during peak electricity consumption.

[0074] In order to meet different power usage requirements, the battery may include a plurality of battery cells, wherein the plurality of battery cells may be connected in series, in parallel, or in hybrid connection, wherein hybrid connection refers to a mixture of series connection and parallel connection.

[0075] The battery includes a case and a plurality of battery cells, and the battery cells are used to be accommodated in the case. The case is used to provide an assembly space for the battery cells, and the case can adopt a variety of structures. In some embodiments, the case may include a first case body and a second case body, the first case body and the second case body cover each other, and the first case body and the second case body jointly define an assembly space for accommodating the battery cells. The second case body can be a hollow structure with one end open, the first case body can be a plate-like structure, and the first case body covers the open side of the second case body, so that the first case body and the second case body jointly define an assembly space; the first case body and the second case body can also be hollow structures with one side open, and the open side of the first case body covers the open side of the second case body. Of course, the case formed by the first case body and the second case body can be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0076] In a battery, multiple battery cells can be connected in series, in parallel, or in a hybrid connection. A hybrid connection means that multiple battery cells are connected in series and in parallel. Multiple battery cells can be directly connected in series, in parallel, or in a hybrid connection, and then the whole formed by multiple battery cells is accommodated in a box; of course, the battery can also be a battery module formed by connecting multiple battery cells in series, in parallel, or in a hybrid connection, and then multiple battery modules are connected in series, in parallel, or in a hybrid connection to form a whole and accommodated in a box. The battery can also include other structures. For example, the battery can also include a busbar component for realizing electrical connection between multiple battery cells.

[0077] The present application discloses an explosion-proof valve 10, which is applied to a battery.

[0078] Reference below Figure 1-Figure 7 The explosion-proof valve 10 according to the embodiment of the present application is described.

[0079] In some embodiments, Figure 1-Figure 4 As shown, the explosion-proof valve 10 includes: a valve body 11, a valve core 12, a waterproof and breathable membrane 17 and an electromagnetic component 13.

[0080] The valve body 11 forms a pressure relief channel 1111; the valve core 12 is installed on the valve body 11, and the valve core 12 has a breathable channel 12111 connected to the pressure relief channel 1111; the waterproof breathable membrane 17 is installed on the valve core 12, and the breathable channel 12111 is connected to the outside through the waterproof breathable membrane 17; the electromagnetic component 13 is arranged opposite to the valve core 12, and the electromagnetic component 13 is used to magnetically attract the valve core 12 when powered on so that the valve core 12 can seal the pressure relief channel 1111.

[0081] The valve body 11 is made of pressure-resistant and corrosion-resistant materials, such as stainless steel, special alloy or plastic.

[0082] For example, Figure 4 As shown, the pressure relief channel 1111 penetrates the valve body 11 along the axial direction of the valve body 11 , and the pressure relief channel 1111 can effectively release the internal pressure of the battery when needed.

[0083] The valve core 12 is made of a material that matches the valve body 11 to maintain sealing and wear resistance. The shape of the valve core 12 should be convenient for matching with the electromagnetic assembly 13 and can accurately control the opening and closing of the pressure relief channel 1111 when moving.

[0084] For example, Figure 4 As shown, the air permeable channel 12111 penetrates the valve core 12 along the axial direction of the valve core 12 and is connected to the pressure relief channel 1111 in the valve body 11.

[0085] The size of the air passage 12111 can be determined according to actual needs so that the explosion-proof valve 10 can maintain sufficient air permeability under normal conditions.

[0086] The waterproof breathable membrane 17 can be made of a polymer material with a microporous structure, such as polytetrafluoroethylene, polyester or polypropylene, etc. The waterproof breathable membrane 17 can effectively prevent impurities such as moisture and dust from entering the interior of the valve body 11, while allowing air molecules to pass through.

[0087] For example, Figure 3-Figure 4 As shown, the waterproof breathable membrane 17 is installed at a position close to the outlet of the breathable channel 12111, and the waterproof breathable membrane 17 can be fixed to the valve core 12 by gluing, pressing or snapping.

[0088] The electromagnetic assembly 13 generates electromagnetic force when energized to attract the valve core 12 to move, thereby controlling the sealing state of the pressure relief channel 1111 .

[0089] The electromagnetic assembly 13 can be installed at an appropriate position outside or inside the valve body 11 so as to be arranged opposite to the valve core 12. During installation, the relative position between the electromagnetic assembly 13 and the valve core 12 should be accurate so that the valve core 12 can be effectively magnetically attracted when power is turned on.

[0090] For example, Figure 4 As shown, the electromagnetic assembly 13 can be installed in the pressure relief channel 1111 of the valve body 11 and is located on the side of the valve core 12 away from the waterproof breathable membrane 17 .

[0091] In actual implementation, Figure 4As shown, in a normal state, the electromagnetic component 13 is connected to the power supply, and under the traction of the magnetic force of the electromagnetic component 13, the valve core 12 is pressed against the valve body 11 to seal the outlet of the pressure relief channel 1111. At this time, the explosion-proof valve 10 can balance the internal and external pressure difference of the box body through the following ways: the gas inside and outside the box body can exchange gas through the pressure relief channel 1111 and the air permeable channel 12111 connected to the pressure relief channel 1111, and under the filtering effect of the waterproof and breathable membrane 17, the moisture, dust and other impurities in the gas outside the box body can be kept out. When the battery is in thermal runaway, the electromagnetic assembly 13 is disconnected from the power supply. As the magnetic force is released, the compressive stress between the valve core 12 and the valve body 11 is greatly reduced. At this time, the explosion-proof valve 10 can quickly and massively release pressure through the following means: the high-temperature and high-pressure gas in the box body can first diffuse to the pressure relief channel 1111. Under the action of the internal and external pressure difference, the high-temperature and high-pressure gas pushes the valve core 12 outward, causing the seal between the valve core 12 and the valve body 11 to completely fail, and the outlet of the pressure relief channel 1111 is connected. Finally, the high-temperature and high-pressure gas can be discharged into the external environment in a large amount in a short time.

[0092] The explosion-proof valve 10 provided in the embodiment of the present application realizes, through the arrangement of the above-mentioned magnetic component, that under normal conditions, the magnetic component magnetically attracts the valve core 12 to seal the pressure relief channel 1111 and only uses the air permeable channel 12111 to balance the internal and external pressure differences, thereby solving the problem that the spring-type explosion-proof valve 10 is prone to abnormal opening when subjected to external disturbances under a low elastic force design, significantly improving the sealing performance of the explosion-proof valve 10 under normal conditions, thereby improving the reliability of the explosion-proof valve 10, and at the same time realizing that the magnetic force releases the pressure relief channel 1111 to open in a battery thermal runaway state to help quickly and massively discharge high-temperature and high-pressure gases, thereby solving the problem that the spring-type explosion-proof valve 10 cannot be opened normally under a high elastic force design, so that the explosion-proof valve 10 can reach the maximum pressure relief area faster during heat diffusion, thereby realizing more efficient and direct exhaust, and accelerating the exhaust rate of the explosion-proof valve 10 during battery thermal runaway, thereby effectively optimizing the safety protection performance of the battery.

[0093] In some embodiments, Figure 4 As shown, the valve core 12 includes a guide rod 121 and a pressure cover 122 .

[0094] The guide rod 121 is installed in the pressure relief channel 1111, and the guide rod 121 forms a breathable channel 12111; the pressure cover 122 is connected to the end of the guide rod 121 away from the electromagnetic assembly 13, and the pressure cover 122 is configured to press the valve body 11 to seal the pressure relief channel 1111 when the electromagnetic assembly 13 is energized.

[0095] like Figure 4As shown, the guide rod 121 is designed to be long and narrow, and one end of the guide rod 121 connected to the pressure cover 122 extends out of the pressure relief channel 1111. The pressure cover 122 is designed to be disc-shaped, and the outer diameter of the pressure cover 122 should be larger than the diameter of the pressure relief channel 1111 so that it can completely cover and seal the pressure relief channel 1111 when tightened.

[0096] The gland 122 may be connected to the end of the guide rod 121 away from the electromagnetic assembly 13 by means of threads, buckles or bolts.

[0097] For example, in some embodiments, Figure 4 As shown, the end of the guide rod 121 away from the electromagnetic assembly 13 has an external thread structure, and the central area of ​​the pressure cover 122 is provided with a threaded hole matching the external thread of the guide rod 121, and in order to strengthen the fixed connection between the guide rod 121 and the pressure cover 122, anaerobic glue can be provided at the threaded connection.

[0098] The explosion-proof valve 10 provided in the embodiment of the present application, through the design of the above-mentioned guide rod 121 and pressure cover 122, when the electromagnetic assembly 13 is energized, the electromagnet 131 generates a strong electromagnetic force to attract the guide rod 121, thereby driving the pressure cover 122 to press the valve body 11 to seal the pressure relief channel 1111, which can significantly improve the sealing performance of the pressure relief channel 1111 and reduce the probability of abnormal opening of the explosion-proof valve 10 under normal working conditions.

[0099] In some embodiments, Figure 3-Figure 4 As shown, the guide rod 121 includes a main rod body 1211 and a magnetic member 1212 . The magnetic member 1212 is made of a paramagnetic material and is installed at one end of the main rod body 1211 close to the electromagnetic assembly 13 .

[0100] The main rod body 1211 can be made of a high-strength, corrosion-resistant and rigid material, such as stainless steel, aluminum alloy or titanium alloy, so that the guide rod 121 can maintain a stable shape and performance during long-term use.

[0101] The magnetic member 1212 is made of a paramagnetic material, such as iron, nickel, cobalt or alloys thereof, which are not limited herein.

[0102] For example, in some embodiments, the magnetic member 1212 is made of iron.

[0103] The magnetic member 1212 can be designed to be cylindrical, sheet-shaped, or other shapes suitable for connection with the main rod body 1211 . The size and shape of the magnetic member 1212 can be determined according to the magnetic field distribution and attraction requirements of the electromagnetic assembly 13 .

[0104] The explosion-proof valve 10 provided in the embodiment of the present application, through the arrangement of the above-mentioned main rod body 1211 and the magnetic part 1212, is convenient for maintenance and replacement of the magnetic part 1212, thereby reducing maintenance costs and extending the service life of the guide rod 121, and the structural design of the magnetic part 1212 can be adjusted and optimized according to the magnetic field characteristics and attraction requirements of the electromagnetic component 13 to adapt to different battery types and working environments, thereby increasing the diversity and flexibility of the design of the explosion-proof valve 10.

[0105] In some embodiments, Figure 3-Figure 4 As shown, the main rod body 1211 is provided with a first installation slot facing the electromagnetic assembly 13 , and the magnetic member 1212 is installed in the first installation slot.

[0106] In this embodiment, if Figure 3-Figure 4 As shown, a first mounting groove is reserved on the end surface of the main rod body 1211 away from the pressure cover 122, and the magnetic member 1212 is embedded in the first mounting groove and can be firmly connected to the main rod body 1211 by welding, gluing or mechanical fixing.

[0107] In other embodiments, the magnetic member 1212 is sleeved on the end of the main rod body 1211 away from the pressure cover 122 and fixed by means of threads, buckles or fasteners.

[0108] In some other embodiments, the magnetic member 1212 and the main rod body 1211 are designed as one body and are directly manufactured by casting, forging or machining.

[0109] The explosion-proof valve 10 provided in the embodiment of the present application can maintain close contact and stable connection between the magnetic part 1212 and the main rod body 1211 through the structural design of embedded installation of the above-mentioned magnetic part 1212, while reducing the falling off or displacement of the magnetic part 1212 under the action of electromagnetic force.

[0110] In some embodiments, Figure 3 As shown, the magnetic member 1212 is an annular structure, and the center line of the magnetic member 1212 coincides with the center line of the valve core 12 .

[0111] Specifically, the annular structure may include but is not limited to a circular ring, a square ring or other polygonal rings, etc., which are not limited here.

[0112] For example, Figure 3 As shown, the magnetic member 1212 is designed to be annular.

[0113] In actual implementation, the inner and outer diameters, thickness, and size of the center hole of the annular magnetic member 1212 can be designed according to the size of the valve core 12 and the layout of the electromagnetic assembly 13. In the manufacturing process, the annular magnetic member 1212 can be manufactured by casting, forging, machining, or powder metallurgy to meet the dimensional accuracy requirements and surface quality requirements.

[0114] It can be understood that, based on the fact that the center line of the magnetic part 1212 coincides with the center line of the valve core 12, in other words, the magnetic part 1212 and the valve core 12 adopt a centering design. When the electromagnetic component 13 adsorbs the magnetic part 1212, the guide rod 121 can be subjected to a uniform magnetic attraction force along the circumferential direction. Therefore, the compressive stress borne by the sealing surface between the pressure cover 122 and the valve body 11 can be evenly distributed along the circumferential direction, thereby alleviating the leakage problem caused by uneven force on the pressure cover 122.

[0115] The explosion-proof valve 10 provided in the embodiment of the present application, through the design of the above-mentioned magnetic part 1212 as an annular structure, enables the magnetic part 1212 to more effectively utilize the magnetic field generated by the electromagnetic component 13, thereby increasing the attraction to the valve core 12, combined with the structural design in which the center line of the magnetic part 1212 coincides with the center line of the valve core 12, so that the compressive stress on the sealing surface between the pressure cover 122 and the valve body 11 can be evenly distributed along the circumferential direction, which helps to optimize the sealing effect of the pressure cover 122.

[0116] In some embodiments, the guide rod 121 is made of paramagnetic material.

[0117] Specifically, the guide rod 121 can be made of paramagnetic materials such as iron, nickel, cobalt or alloys thereof as main materials. These materials can be magnetized and generate magnetism under the action of a magnetic field, thereby interacting with the electromagnetic component 13 .

[0118] For example, in some embodiments, the guide rod 121 is made of iron.

[0119] The explosion-proof valve 10 provided in the embodiment of the present application adopts an integrally formed design through the above-mentioned guide rod 121, that is, the entire guide rod 121 is made of a single paramagnetic material, and no additional magnetic part 1212 is required to be installed, which simplifies the structure and reduces the number of components, thereby reducing manufacturing cost and complexity.

[0120] In some embodiments, Figure 4-Figure 6 As shown, the electromagnetic assembly 13 includes an electromagnet 131 and a suction cup 132 .

[0121] The electromagnet 131 is disposed in the valve body 11; the suction cup 132 is disposed in the valve body 11, and the suction cup 132 is connected to the electromagnet 131. The suction cup 132 is used to block the air passage 12111 when the electromagnet 131 is energized, and the suction cup 132 is provided with a first exhaust hole 1321 for connecting the pressure relief passage 1111 and the air passage 12111.

[0122] like Figure 6 As shown, the electromagnet 131 includes an iron core 1311 and a coil 1312 wrapped around the iron core 1311 . The coil 1312 can be connected to an external power source. The coil 1312 can be made of a material with high magnetic permeability and low resistivity, such as a copper coil 1312 or an aluminum coil 1312 wound around the iron core 1311 .

[0123] The electromagnet 131 can be designed to be cylindrical or rectangular to match the shape of the pressure relief channel 1111. The coil 1312 is wound around the iron core 1311 to form the magnetic field generating part of the electromagnet 131. The number of turns of the coil 1312 can be determined according to the required electromagnetic force and installation space.

[0124] The suction cup 132 may be made of a non-magnetic material having certain strength and corrosion resistance, such as stainless steel or aluminum alloy.

[0125] The suction cup 132 is designed to be in a shape matching the electromagnet 131 , and may be in a disc shape or a rectangular shape, etc., which is not limited here.

[0126] For example, in some embodiments, Figure 4-Figure 6 As shown, the suction cup 132 is designed to be disc-shaped.

[0127] The suction cup 132 can be connected to the electromagnet 131 by means of threads, snaps or welding.

[0128] For example, in some embodiments, the suction cup 132 is threadedly connected to the electromagnet 131 .

[0129] In this embodiment, if Figure 4 As shown, when the electromagnet 131 is energized, the magnetic member 1212 is adsorbed on the suction cup 132, so that the suction cup 132 blocks the opening of the air passage 12111 away from the waterproof breathable membrane 17. Since the suction cup 132 is provided with a first exhaust hole 1321, the length of the first exhaust hole 1321 needs to be greater than the radial width of the magnetic member 1212. In this way, the pressure relief channel 1111 can be connected to the air passage 12111 through the first exhaust hole 1321. Under normal conditions, the gas in the box and the external gas can be exchanged through the pressure relief channel 1111 and the air passage 12111 to balance the pressure difference.

[0130] The shape of the first exhaust hole 1321 may be a cuboid, a semi-cylindrical shape, a prism shape, etc., which is not limited here.

[0131] For example, in some embodiments, Figure 5-Figure 6 As shown, the first exhaust hole 1321 is in a semi-cylindrical shape.

[0132] The number of the first exhaust holes 1321 can be multiple, and the multiple first exhaust holes 1321 are distributed along the circumference of the suction cup 132 at intervals, wherein multiple means two or more.

[0133] For example, in some embodiments, Figure 5 As shown, four first exhaust holes 1321 are provided on the suction cup 132 .

[0134] The explosion-proof valve 10 provided in the embodiment of the present application, through the arrangement of the above-mentioned electromagnet 131 and the suction cup 132, when the electromagnet 131 is energized, the suction cup 132 is tightly attached to the valve core 12 under the action of the electromagnetic force, effectively blocking the air permeable channel 12111 to prevent a large amount of gas leakage, and the design of the first exhaust hole 1321 also enables the suction cup 132 to release pressure while blocking the air permeable channel 12111, thereby providing structural support for the two-way ventilation function of the explosion-proof valve 10 under normal working conditions.

[0135] In some embodiments, Figure 2-Figure 4 As shown, the explosion-proof valve 10 further includes a protective cover 14 .

[0136] The protective cover 14 is disposed in the valve body 11 , and forms a first cavity 141 connected to the pressure relief channel 1111 and the first exhaust hole 1321 . The protective cover 14 is connected to the valve body 11 , the electromagnet 131 passes through the protective cover 14 , and the suction cup 132 is disposed in the first cavity 141 .

[0137] In this embodiment, if Figure 3-Figure 4 As shown, the protective cover 14 is arranged in the pressure relief channel 1111, and the side of the protective cover 14 facing away from the electromagnetic assembly 13 is connected to the valve body 11. The protective cover 14 is designed as a cylindrical structure with one side open to form a first cavity 141 opened in the direction of the pressure cover 122. The first cavity 141 is connected to the pressure relief channel 1111 through the opening. The suction cup 132 is located in the protective cover 14, and the end of the electromagnet 131 close to the valve core 12 can have an external thread structure. The suction cup 132 and the protective cover 14 can both be provided with a threaded hole that cooperates with the external thread structure of the electromagnet 131.

[0138] The explosion-proof valve 10 provided in the embodiment of the present application, through the setting of the above-mentioned protective cover 14, the protective cover 14 is an independent component in the valve body 11. Through the firm connection with the valve body 11, a stable installation platform is provided for the electromagnetic assembly 13, which helps to reduce the risk of loosening of the electromagnetic assembly 13 due to vibration, impact or external pressure changes. At the same time, the protective cover 14 can protect the valve core 12 and the suction cup 132, thereby improving the working reliability of the valve core 12 and the electromagnetic assembly 13.

[0139] In some embodiments, Figure 7 As shown, the valve body 11 includes a main body 111 and a reinforcement structure 112 .

[0140] The main body 111 forms a pressure relief channel 1111 ; the reinforcement structure 112 is connected to the inner wall of the main body 111 , the reinforcement structure 112 is sleeved on the valve core 12 , and the reinforcement structure 112 is connected to the protective cover 14 .

[0141] like Figure 7 As shown, the reinforcing structure 112 and the main body 111 can be integrally formed, and the reinforcing structure 112 can include a circular ring structure and a plurality of connecting ribs circumferentially separated and arranged outside the circular ring structure. The axial direction of the circular ring structure coincides with the axial direction of the main body 111, and the connecting ribs can be connected between the outer wall of the circular ring structure and the inner wall of the main body 111.

[0142] Here, “multiple” means two or more than two. For example, in some embodiments, the reinforcement structure 112 may include a circular ring structure and three connecting ribs circumferentially spaced outside the circular ring structure.

[0143] In this embodiment, the annular structure can be sleeved on the valve core 12 to limit the radial displacement of the valve core 12. The annular structure is not fixed to the valve core 12 to allow the valve core 12 to move axially when the electromagnetic assembly 13 is powered off. The protective cover can be fixedly connected to the side of the connecting rib away from the pressure cover 122 by gluing, welding, threading or clamping.

[0144] The explosion-proof valve 10 provided in the embodiment of the present application, through the arrangement of the above-mentioned main body 111 and the reinforcement structure 112, the reinforcement structure 112 can indicate the arrangement position of the valve core 12 in the valve body 11, simplify the installation process of the valve core 12, facilitate the assembly of the valve core 12, realize the fixed connection between the valve body 11 and the protective cover 14, improve the assembly reliability of the electromagnetic component 13, and at the same time significantly improve the overall load-bearing capacity of the valve body 11, and reduce the risk of structural deformation or damage caused by vibration or impact.

[0145] In some embodiments, Figure 3-Figure 4 As shown, the explosion-proof valve 10 further includes an elastic member 18 .

[0146] The elastic member 18 is sleeved on the valve core 12 , and the elastic member 18 is elastically connected between the valve core 12 and the valve body 11 .

[0147] The elastic member 18 may include but is not limited to a coil spring, a leaf spring, a rubber ring or a silicone pad, etc., which is not limited here.

[0148] For example, in some embodiments, Figure 3-Figure 4 As shown, the elastic member 18 is a coil spring.

[0149] The elastic member 18 can be elastically compressed between the valve core 12 and the valve body 11, and the stiffness coefficient of the elastic member 18 can be designed to be relatively small. Specifically, the opening pressure provided by the elastic member 18 does not significantly affect the discharge efficiency of the high-temperature and high-pressure gas when the battery is out of control.

[0150] In actual implementation, Figure 4 As shown, in a normal state, the electromagnetic assembly 13 is connected to the power supply, and under the action of the magnetic force of the electromagnetic assembly 13 and the elastic force provided by the elastic member 18, the valve core 12 is pressed against the valve body 11 to seal the outlet of the pressure relief channel 1111. When the battery has thermal runaway, the electromagnetic assembly 13 is disconnected from the power supply. With the release of the magnetic force, the elastic force is insufficient to withstand the impact force of the high-temperature and high-pressure gas inside the box at this time. The high-temperature and high-pressure gas can continue to compress the elastic member 18 relatively easily, so that the gap between the gland 122 and the valve body 11 is getting larger and larger. With the continuous release of the high-temperature and high-pressure gas, the pressure inside the box gradually decreases until it reaches a balance with the external environment. The valve core 12 begins to reset under the action of the elastic member 18, and the gland 122 is again attached to the valve body 11. At this time, the electromagnetic assembly 13 will not resume power supply. Resealing with the elastic member 18 can prevent a large amount of water and other impurities from entering the box in special circumstances (such as watering for firefighting) before maintaining the battery.

[0151] The explosion-proof valve 10 provided in the embodiment of the present application, through the arrangement of the above-mentioned elastic member 18, the low-elasticity elastic member 18 can seal the explosion-proof valve 10 again after the battery thermal runaway exhaust weakens, so as to prevent foreign matter from entering the box body and stimulating thermal, electrical and chemical reactions in the battery monomers under special circumstances.

[0152] In some embodiments, Figure 3-Figure 4 As shown, the explosion-proof valve 10 further includes a pressure ring 19 .

[0153] A second mounting groove is provided on the side of the valve core 12 away from the electromagnetic assembly 13 , and the waterproof breathable membrane 17 and the pressure ring 19 are installed in the second mounting groove, and the pressure ring 19 is used to press the waterproof breathable membrane 17 against the valve core 12 .

[0154] The shape of the pressure ring 19 can match the shape of the waterproof breathable membrane 17. For example, in some embodiments, Figure 3-Figure 4As shown, the pressure ring 19 is annular, the waterproof breathable membrane 17 is circular, and correspondingly, the second installation groove is also a circular groove.

[0155] The pressure ring 19 can be installed in the second installation groove by interference fit, threaded connection or snap connection, etc., which is not limited here.

[0156] For example, in some embodiments, the pressure ring 19 can be installed in the second installation groove by interference fit.

[0157] In this embodiment, if Figure 4 As shown, the waterproof breathable membrane 17 can be clamped between the pressure ring 19 and the bottom wall of the second mounting groove, the waterproof breathable membrane 17 and the pressure ring 19 can be located as a whole in the second mounting groove, and the surface of the waterproof breathable membrane 17 facing away from the pressure ring 19 can be flush with the outer periphery of the second mounting groove.

[0158] The explosion-proof valve 10 provided in the embodiment of the present application presses the waterproof breathable membrane 17 against the valve core 12 through the above-mentioned pressure ring 19. Combined with the embedded installation design, it is possible to maintain close contact and stable connection between the pressure cover 122 and the pressure ring 19 and the waterproof breathable membrane 17, reduce the shedding or displacement of the pressure ring 19 and the waterproof breathable membrane 17, thereby effectively improving the sealing between the waterproof breathable membrane 17 and the valve core 12, and further reducing the entry of external moisture and impurities into the interior of the box.

[0159] In some embodiments, Figure 4 As shown, a boss 1221 is provided on the bottom wall of the second mounting groove, the waterproof breathable membrane 17 is fixedly connected to the boss 1221 , and the edge of the waterproof breathable membrane 17 is clamped between the pressure ring 19 and the boss 1221 .

[0160] The shape and size of the boss 1221 must match the waterproof breathable membrane 17 , and the boss 1221 may be cylindrical, square, or other suitable shapes.

[0161] For example, in some embodiments, the waterproof breathable membrane 17 is circular, and correspondingly, the boss 1221 is annular.

[0162] The connection method between the boss 1221 and the waterproof breathable membrane 17 may include but is not limited to bonding, hot-melt connection or clamping, etc., which is not limited here.

[0163] For example, in some embodiments, the boss 1221 and the waterproof breathable membrane 17 are connected by bonding.

[0164] The design of the boss 1221 enhances the sealing performance of the edge of the waterproof breathable membrane 17 . The boss 1221 and the pressure ring 19 provide a more stable support and fixation for the waterproof breathable membrane 17 , reducing the risk of loosening or falling off due to vibration or impact, and helping to reduce the maintenance frequency of the waterproof breathable membrane 17 .

[0165] In some embodiments, Figure 1-Figure 4 As shown, the explosion-proof valve 10 further includes a valve cover 15 .

[0166] like Figure 1 and Figure 4 As shown, the valve cover 15 is connected to the valve core 12 to form a second cavity 21 connected to the air permeable channel 12111, a third cavity 22 and a pressure relief port 23 connected to the third cavity 22 are formed between the valve cover 15 and the valve body 11, and the valve cover 15 is provided with a second exhaust hole 151 for connecting the second cavity 21 and the third cavity 22.

[0167] The connection method between the valve cover 15 and the valve core 12 may include, but is not limited to, interference fit, threaded connection, welding, clamping or riveting, etc., which is not limited here.

[0168] For example, in some embodiments, Figure 4 As shown, the connection between the valve cover 15 and the valve core 12 is interference fit, and chamfer structures can be provided on the valve cover 15 and the valve core 12 to reduce the difficulty of assembly.

[0169] The shape of the second exhaust hole 151 may include but is not limited to circular, square, elliptical or other shapes, which are not limited here.

[0170] For example, in some embodiments, Figure 4 As shown, the second exhaust hole 151 is circular.

[0171] A plurality of second exhaust holes 151 may be provided, wherein a plurality means two or more.

[0172] For example, in some embodiments, the valve cover 15 is provided with four second exhaust holes 151 .

[0173] In actual implementation, under normal conditions, the gas in the box can pass through the pressure relief channel 1111, the first cavity 141, the air permeable channel 12111, the second cavity 21, the second exhaust hole 151 and the third cavity 22 in sequence, and finally leave from the pressure relief port 23. The external gas can first enter the pressure relief port 23, and then pass through the third cavity 22, the second exhaust hole 151, the second cavity 21, the air permeable channel 12111, the first cavity 141 and the pressure relief channel 1111 to enter the box, thereby realizing the internal and external gas exchange under normal conditions. When the battery is in thermal runaway, the high-temperature and high-pressure gas in the box can first enter the pressure relief channel 1111, then enter the third cavity 22, and finally be discharged from the pressure relief port 23.

[0174] It should be noted that when the battery is in thermal runaway, the valve core 12 is pushed upward. Although the exhaust path where the air channel 12111 is located is also in a conductive state, since the pressure relief channel 1111 is almost completely open at this time, the exhaust path where the air channel 12111 is located is of little use in this case, and the size of the pressure relief port 23 also increases significantly with the movement of the valve core 12.

[0175] The explosion-proof valve 10 provided in the embodiment of the present application forms an efficient and clear exhaust path through the arrangement of the above-mentioned valve cover 15, combined with the design of the second cavity 21, the third cavity 22 and the pressure relief port 23. The existence of the third cavity 22 is equivalent to a pressure buffer zone, which can alleviate the impact force of the high-pressure gas to a certain extent, making the pressure relief process more stable and controllable when the battery thermal runaway occurs, reducing the impact force and destructive force caused by the sudden release of high-pressure gas.

[0176] In some embodiments, Figure 3-Figure 4 As shown, the explosion-proof valve 10 further includes a valve member 16 .

[0177] The valve member 16 is installed in the valve core 12, and the valve member 16 blocks the air permeable channel 12111. The valve member 16 forms a guide channel 161 and a flow slot 162, and is configured such that when a pressure difference occurs on both sides, the flow slot 162 opens to make both sides of the guide channel 161 communicate with the air permeable channel 12111.

[0178] The valve member 16 can be made of elastic material, such as silicone, rubber, polytetrafluoroethylene or nylon.

[0179] like Figure 4 As shown, the width of the guide channel 161 gradually decreases from one end close to the electromagnetic component 13 to the end away from the electromagnetic component 13, and the inner wall of the valve core 12 is provided with a third mounting groove, and the valve component 16 is installed in the third mounting groove, and the valve component 16 can abut between the magnetic component 1212 and the bottom wall of the third mounting groove, that is, the magnetic component 1212 can compact the valve component 16.

[0180] The flow slot 162 may penetrate the valve member 16 along the axial direction of the valve body 11 , wherein one or more flow slots 162 may be provided, and more than one means two or more.

[0181] For example, in some embodiments, Figure 4 As shown, the valve member 16 forms a flow slot 162 .

[0182] It can be understood that when a pressure difference occurs on both sides of the valve component 16, the flow slit 162 can be opened to achieve two-way conduction between the guide channel 161 and the air permeable channel 12111. For example, when the internal pressure is higher than the external pressure, the flow slit 162 can be opened to allow gas to flow from the high-pressure side to the low-pressure side, thereby balancing the pressure. At the same time, the valve component 16 can also play a filtering role, further reducing the entry of moisture, dust and other impurities into the box.

[0183] In some embodiments, Figure 3-Figure 4 As shown, the explosion-proof valve 10 further includes a first sealing member 24 .

[0184] The first sealing member 24 is elastically compressed between the valve core 12 and the valve body 11 .

[0185] The first sealing member 24 may include a sealing ring, a sealing adhesive or a sealing gasket, etc., which is not limited here.

[0186] For example, in some embodiments, Figure 3 As shown, the first sealing member 24 is a sealing ring.

[0187] like Figure 3-Figure 4 As shown, a fourth installation groove open toward the gland 122 may be provided on the valve body 11, and the first sealing member 24 may be installed in the fourth installation groove.

[0188] By disposing the first sealing member 24 , the gap between the valve core 12 and the valve body 11 is effectively sealed to prevent gas or liquid leakage, thereby optimizing the sealing performance of the explosion-proof valve 10 .

[0189] In some embodiments, Figure 1-Figure 4 As shown, the explosion-proof valve 10 further includes a second sealing member 25 .

[0190] The second sealing member 25 is used to be elastically compressed between the battery box and the valve body 11 .

[0191] The second sealing member 25 may include a sealing ring, a sealing adhesive or a sealing gasket, etc., which is not limited here.

[0192] For example, in some embodiments, Figure 1-Figure 4 As shown, the second sealing member 25 is a sealing ring.

[0193] like Figure 3-Figure 4 As shown, a fifth mounting groove open in a direction away from the pressure cover 122 can be provided on the valve body 11. When the explosion-proof valve 10 is assembled in the box body, the second sealing member 25 is installed in the fifth mounting groove in a compressed state. Specifically, the second sealing member 25 is elastically compressed between the valve body 11 and the box body, and the second sealing member 25 and the box body are clamped between the valve body 11 and the nut. The nut cooperates with the external thread structure of the valve body 11, and the nut is located inside the box body. The nut abuts against the inner wall surface of the box body as a fastener.

[0194] By setting the second sealing member 25, the second sealing member 25 is tightly clamped between the valve body 11 and the box body to form a sealed interface, which can effectively reduce gas leakage from the gap between the box body and the valve body 11 and improve the overall sealing performance.

[0195] The application also discloses a battery.

[0196] In some embodiments, the battery includes: a casing, a plurality of battery cells, and an explosion-proof valve 10 as described above.

[0197] A plurality of battery cells are accommodated in the box; an explosion-proof valve 10 is installed in the box.

[0198] The battery provided in the embodiment of the present application, through the arrangement of the above-mentioned explosion-proof valve 10, realizes that under normal conditions, the magnetic component magnetic valve core 12 uses only the air permeable channel 12111 to balance the internal and external pressure differences by sealing the pressure relief channel 1111, thereby solving the problem that the spring-type explosion-proof valve 10 is prone to abnormal opening when subjected to external disturbances under a low elastic force design, significantly improving the sealing performance of the explosion-proof valve 10 under normal conditions, thereby improving the reliability of the explosion-proof valve 10, and at the same time realizing that the magnetic force releases the opening of the pressure relief channel 1111 in a battery thermal runaway state to help quickly and massively discharge high-temperature and high-pressure gases, thereby solving the problem that the spring-type explosion-proof valve 10 cannot be opened normally under a high elastic force design, so that the explosion-proof valve 10 can reach the maximum pressure relief area faster during heat diffusion, thereby realizing more efficient and direct exhaust, and accelerating the exhaust rate of the explosion-proof valve 10 during battery thermal runaway, thereby effectively optimizing the safety protection performance of the battery.

[0199] In some embodiments, the battery further comprises: a control system.

[0200] The control system is electrically connected to the plurality of battery cells and the electromagnetic assembly 13 of the explosion-proof valve 10 , and the control system is used to cut off the power supply of the electromagnetic assembly 13 when thermal runaway of the battery cells is detected.

[0201] In actual implementation, the control system can monitor the key parameters of the battery pack, such as temperature, voltage, and current, in real time, so as to identify potential risks of thermal runaway. When it is detected that the temperature of a battery cell exceeds a preset safety threshold, the control system considers that the battery cell has experienced thermal runaway. The control system can decide whether to cut off the power supply of the electromagnetic component 13 based on preset logical judgment rules. Once it decides to cut off the power supply, the control system will send a control signal to the electromagnetic component 13 to quickly cut off the power supply of the electromagnetic component 13 and close the auxiliary closing function of the explosion-proof valve 10, so that the explosion-proof valve 10 can be flushed open by the high-temperature and high-pressure gas inside the box.

[0202] The battery provided in the embodiment of the present application, through the functional design of the above-mentioned control system, the control system can identify the status of multiple battery cells and control the circuit channel of the electromagnetic component 13 to realize the opening and closing of the auxiliary closing function of the explosion-proof valve 10, detect the thermal runaway of the battery cells in a very short time, and quickly cut off the power supply of the electromagnetic component 13, effectively preventing the further spread of thermal runaway, thereby maximizing the safety protection performance of the battery.

[0203] The application also discloses an electrical device.

[0204] In some embodiments, the electrical device includes: a battery as described above.

[0205] The electrical device provided in the embodiment of the present application realizes, through the arrangement of the above-mentioned battery, that under normal conditions, the magnetic component magnetic valve core 12 uses only the air permeable channel 12111 to balance the internal and external pressure differences by sealing the pressure relief channel 1111, thereby solving the problem that the spring-type explosion-proof valve 10 is prone to abnormal opening when subjected to external disturbances under a low elastic force design, significantly improving the sealing performance of the explosion-proof valve 10 under normal conditions, thereby improving the reliability of the explosion-proof valve 10, and at the same time realizing that the magnetic force releases the opening of the pressure relief channel 1111 under a thermal runaway state of the battery to help quickly and massively discharge high-temperature and high-pressure gases, thereby solving the problem that the spring-type explosion-proof valve 10 cannot be opened normally under a high elastic force design, so that the explosion-proof valve 10 can reach the maximum pressure relief area faster during heat diffusion, thereby realizing more efficient and direct exhaust, and accelerating the exhaust rate of the explosion-proof valve 10 during thermal runaway of the battery, thereby effectively optimizing the safety protection performance of the battery.

[0206] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0207] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0208] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0209] In the description of the present application, “plurality” means two or more.

[0210] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0211] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0212] Other structures of ... according to the embodiments of the present application, such as ... and ..., and operations are known to ordinary technicians in the field and will not be described in detail here.

[0213] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0214] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An explosion-proof valve, applied to a battery, characterized in that: include: The valve body forms a pressure relief passage; A valve core is installed on the valve body and has a venting passage communicating with the pressure relief passage; A waterproof breathable membrane is installed on the valve core, and the breathable passage is connected with the outside world through the waterproof breathable membrane; The electromagnetic component is arranged opposite to the valve core and is used for magnetically attracting the valve core in a power-on state so that the valve core seals the pressure relief channel.

2. The explosion-proof valve according to claim 1, characterized in that: The valve core comprises: A guide rod is installed in the pressure relief channel to form the air permeable channel; The pressure cover is connected to the end of the guide rod away from the electromagnetic assembly and is configured to press the valve body to seal the pressure relief channel when the electromagnetic assembly is energized.

3. The explosion-proof valve according to claim 2, characterized in that: The guide rod comprises a main rod body and a magnetic component. The magnetic component is made of paramagnetic material and is installed at one end of the main rod body close to the electromagnetic component.

4. The explosion-proof valve according to claim 3, characterized in that: The main rod body is provided with a first mounting groove facing the electromagnetic assembly, and the magnetic member is mounted in the first mounting groove.

5. The explosion-proof valve according to claim 3, characterized in that: The magnetic component is an annular structure, and the center line of the magnetic component coincides with the center line of the valve core.

6. The explosion-proof valve according to claim 2, characterized in that: The guide rod is made of paramagnetic material.

7. The explosion-proof valve according to claim 1, characterized in that: The electromagnetic assembly comprises: An electromagnet is disposed in the valve body; A suction cup is disposed in the valve body and connected to the electromagnet, and is used to block the air passage when the electromagnet is energized, and is provided with a first exhaust hole for connecting the pressure relief passage and the air passage.

8. The explosion-proof valve according to claim 7, characterized in that: Also includes: A protective cover is disposed in the valve body and forms a first cavity connected to the pressure relief channel and the first exhaust hole. The protective cover is connected to the valve body, the electromagnet passes through the protective cover, and the suction cup is disposed in the first cavity.

9. The explosion-proof valve according to claim 8, characterized in that: The valve body comprises: A main body portion, forming the pressure relief channel; The reinforcement structure is connected to the inner wall of the main body, sleeved on the valve core, and connected to the protective cover.

10. The explosion-proof valve according to any one of claims 1 to 9, characterized in that: Also includes: The elastic member is sleeved on the valve core and elastically connected between the valve core and the valve body.

11. The explosion-proof valve according to any one of claims 1 to 9, characterized in that: Also includes: A pressure ring, a second installation groove is provided on the side of the valve core away from the electromagnetic assembly, the waterproof breathable membrane and the pressure ring are installed in the second installation groove, and the pressure ring is used to press the waterproof breathable membrane against the valve core.

12. The explosion-proof valve according to claim 11, characterized in that: A boss is provided on the bottom wall of the second mounting groove, the waterproof breathable membrane is fixedly connected to the boss, and the edge of the waterproof breathable membrane is clamped between the pressure ring and the boss.

13. The explosion-proof valve according to any one of claims 1 to 9, characterized in that: Also includes: A valve cover is connected to the valve core to form a second cavity connected to the air permeable channel, a third cavity and a pressure relief port connected to the third cavity are formed between the valve cover and the valve body, and the valve cover is provided with a second exhaust hole for connecting the second cavity and the third cavity.

14. The explosion-proof valve according to any one of claims 1 to 9, characterized in that: Also includes: The valve member is installed in the valve core to block the air permeable channel. The valve member forms a guide channel and a flow slot, and is configured to open the flow slot when a pressure difference occurs on both sides to make the two sides of the air permeable channel communicate with the air permeable channel.

15. The explosion-proof valve according to any one of claims 1 to 9, characterized in that: The explosion-proof valve also includes: a first sealing member, elastically compressed between the valve core and the valve body; and / or, The explosion-proof valve also includes: The second sealing member is used for being elastically compressed between the battery box and the valve body.

16. A battery, characterized in that: include: Box; A plurality of battery cells are contained in the box; The explosion-proof valve according to any one of claims 1 to 15, mounted on the box.

17. The battery according to claim 16, characterized in that Also includes: A control system is electrically connected to the electromagnetic assembly of the explosion-proof valve and the plurality of battery cells, and is used to cut off power supply to the electromagnetic assembly when thermal runaway of the battery cells is detected.

18. An electrical device, characterized in that: include: A battery as claimed in claim 16 or 17.

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