Explosion-proof valve, battery and electric device

Abstract

The application discloses an explosion-proof valve, a battery and a power utilization device, and belongs to the technical field of batteries. The explosion-proof valve comprises a valve body, a valve core, a waterproof air-permeable film and an electromagnetic assembly. The valve body forms a pressure relief channel. The valve core is installed on the valve body and is provided with an air-permeable channel which is in communication with the pressure relief channel. The waterproof air-permeable film is installed on the valve core, and the air-permeable channel is in communication with the outside through the waterproof air-permeable film. The electromagnetic assembly is arranged opposite to the valve core and is used for magnetically attracting the valve core in a power-on state to enable the valve core to seal the pressure relief channel. Through the arrangement of the above-mentioned magnetic assembly, the problem that a spring type explosion-proof valve is prone to abnormal opening under low elastic force design is solved, the sealing performance of the explosion-proof valve under normal conditions is improved, the reliability of the explosion-proof valve is improved, the problem that the spring type explosion-proof valve cannot be normally opened under high elastic force design is solved, the explosion-proof valve can reach the maximum pressure relief area more quickly during thermal diffusion, and the exhaust rate of the explosion-proof valve during thermal runaway of the battery is accelerated.

Description

Technical Field

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

[0002] As a crucial safety component of batteries, the explosion-proof valve's ability to rapidly release high-pressure gases from the battery casing in the event of thermal runaway is a core performance indicator. In related technologies, explosion-proof valves typically utilize the elastic force of springs to achieve a sealing function under normal conditions. However, existing spring-loaded explosion-proof valves suffer from problems such as easy accidental opening with low elastic force and difficulty in proper opening with high elastic force, reducing their reliability. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes an explosion-proof valve, a battery, and an electrical device that improves the sealing performance of the explosion-proof valve under normal conditions, enhances the reliability of the explosion-proof valve, achieves more efficient and direct venting, and accelerates the venting rate of the explosion-proof valve during battery thermal runaway.

[0004] In a first aspect, this application provides an explosion-proof valve for use in batteries, comprising:

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

[0006] The valve core is installed in the valve body and has a vent passage communicating with the pressure relief passage;

[0007] A waterproof and breathable membrane is installed on the valve core, and the breathable channel is connected to the outside through the waterproof and breathable membrane;

[0008] An electromagnetic component, disposed opposite to the valve core, is used to magnetically attract the valve core when energized, so that the valve core seals the pressure relief channel.

[0009] According to the explosion-proof valve of this application, by setting the aforementioned magnetic component, the magnetic component magnetically attracts the valve core to seal the pressure relief channel under normal conditions, and only uses the venting channel to balance the internal and external pressure difference. This solves the problem that spring-type explosion-proof valves are prone to abnormal opening when subjected to external disturbances due to low elasticity design, significantly improving the sealing performance of the explosion-proof valve under normal conditions, thereby enhancing the reliability of the explosion-proof valve. At the same time, it enables the magnetic force to be released and the pressure relief channel to open under battery thermal runaway conditions, helping to quickly and massively discharge high-temperature and high-pressure gases. This solves the problem that spring-type explosion-proof valves cannot open normally under high elasticity design, allowing the explosion-proof valve to reach the maximum pressure relief area more quickly during thermal diffusion, achieving more efficient and direct venting, accelerating the venting rate of the explosion-proof valve during battery thermal runaway, thereby effectively optimizing the battery's safety protection performance.

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

[0011] The guide rod is installed in the pressure relief channel to form the ventilation channel;

[0012] A pressure cap, connected to the end of the guide rod away from the electromagnetic component, is configured to press the valve body to seal the pressure relief channel when the electromagnetic component is energized.

[0013] According to one embodiment of this application, the guide rod includes a main rod body and a magnetic component, the magnetic component being made of a paramagnetic material and being mounted on one end of the main rod body near the electromagnetic assembly.

[0014] According to one embodiment of this application, the main rod body is provided with a first mounting groove facing the electromagnetic component, and the magnetic component is mounted in the first mounting groove.

[0015] According to one embodiment of this application, the magnetic element is a ring structure, and the center line of the magnetic element coincides with the center line of the valve core.

[0016] According to one embodiment of this application, the guide rod is made of a paramagnetic material.

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

[0018] An electromagnet is installed inside the valve body;

[0019] A suction cup, located within the valve body and connected to the electromagnet, is used to block the venting channel when the electromagnet is energized, and is provided with a first exhaust port for connecting the pressure relief channel and the venting channel.

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

[0021] A protective cover is disposed within the valve body and forms a first cavity communicating with the pressure relief channel and the first exhaust port. 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 this application, the valve body includes:

[0023] The main body forms the pressure relief channel;

[0024] A reinforced structure is attached to the inner wall of the main body, fitted onto the valve core, and connected to the protective cover.

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

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

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

[0028] A pressure ring is provided, and the valve core has a second mounting groove on the side opposite to the electromagnetic component. The waterproof and breathable membrane and the pressure ring are installed in the second mounting groove, and the pressure ring is used to press the waterproof and breathable membrane against the valve core.

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

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

[0031] A valve cover is connected to the valve core to form a second cavity communicating with the venting channel. A third cavity is formed between the valve cover and the valve body, and a pressure relief port communicating with the third cavity is formed. The valve cover is provided with a second vent hole for communicating with the second cavity and the third cavity.

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

[0033] A valve element, installed inside the valve core, blocks the venting channel. The valve element forms a flow channel and a flow gap, and is configured to open the flow gap when a pressure difference occurs on both sides, so that the two sides of the venting channel are connected to the venting channel.

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

[0035] The first sealing element is elastically compressed between the valve core and the valve body;

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

[0037] The second seal is used to elastically compress between the battery housing and the valve body.

[0038] Secondly, this application provides a battery comprising:

[0039] Box;

[0040] Multiple battery cells are housed within the housing;

[0041] An explosion-proof valve of any of the above types is installed in the enclosure.

[0042] According to the battery of this application, the aforementioned explosion-proof valve configuration enables the magnetic component to magnetically attract the valve core under normal conditions, sealing the pressure relief channel and balancing the internal and external pressure difference using only the venting channel. This solves the problem of spring-type explosion-proof valves being prone to abnormal opening under external disturbances due to their low elasticity design, significantly improving the sealing performance of the explosion-proof valve under normal conditions, thereby enhancing its reliability. Simultaneously, it enables the magnetic force to be released and the pressure relief channel to open under battery thermal runaway conditions, facilitating the rapid and large-scale discharge of high-temperature, high-pressure gases. This solves the problem of spring-type explosion-proof valves failing to open properly under high elasticity design, allowing the explosion-proof valve to reach its maximum pressure relief area more quickly during thermal diffusion, achieving more efficient and direct venting, accelerating the venting rate of the explosion-proof valve during battery thermal runaway, and thus effectively optimizing the battery's safety protection performance.

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

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

[0045] Thirdly, this application provides an electrical appliance, which includes:

[0046] The battery mentioned above.

[0047] According to the electrical device of this application, by setting up the aforementioned battery, the magnetic component magnetically attracts the valve core to seal the pressure relief channel under normal conditions, and balances the internal and external pressure difference only by utilizing the venting channel. This solves the problem that spring-type explosion-proof valves are prone to abnormal opening when subjected to external disturbances due to low elasticity design, significantly improving the sealing performance of the explosion-proof valve under normal conditions, thereby enhancing the reliability of the explosion-proof valve. At the same time, it enables the magnetic force to be released and the pressure relief channel to open under battery thermal runaway conditions, helping to quickly and massively discharge high-temperature and high-pressure gases. This solves the problem that spring-type explosion-proof valves cannot open normally under high elasticity design, allowing the explosion-proof valve to reach the maximum pressure relief area more quickly during thermal diffusion, achieving more efficient and direct venting, accelerating the venting rate of the explosion-proof valve during battery thermal runaway, thereby effectively optimizing the battery's safety protection performance.

[0048] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0049] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken 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 embodiments of this application;

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

[0052] Figure 3 This is an exploded view of the explosion-proof valve provided in the embodiments of this application;

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

[0054] Figure 5 This is a schematic diagram of the structure of the electromagnetic component provided in the embodiments of this application;

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

[0056] Figure 7 This is a schematic diagram of the valve body provided in the embodiment of this application.

[0057] Figure label:

[0058] Explosion-proof valve 10;

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

[0060] Valve core 12, guide rod 121, main rod body 1211, ventilation channel 12111, magnetic component 1212, pressure cap 122, boss 1221;

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

[0062] Protective cover 14, first cavity 141,

[0063] Valve cover 15, second vent 151;

[0064] Valve component 16, drainage channel 161, flow passage 162;

[0065] 17. Waterproof and breathable membrane; 18. Elastic element; 19. Pressure ring;

[0066] Second cavity 21, third cavity 22, pressure relief port 23;

[0067] First seal 24, second seal 25. Detailed Implementation

[0068] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0069] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0070] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0071] The vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle's interior can house a motor, a controller, and a battery. The controller controls the battery's power supply to the motor. For example, the battery can be located at the bottom, front, or rear of the vehicle. The battery can be used to power the vehicle; for example, it can serve as the vehicle's operating power source for the vehicle's electrical system, such as meeting the power requirements for starting, navigation, and operation. In another embodiment of this application, the battery can not only serve as the vehicle's operating power source but also as its driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle.

[0072] The battery provided in this application can also be used in energy storage systems, which include one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple batteries connected in series via a busbar to increase the voltage of the energy storage system. When the energy storage system includes multiple battery clusters, the 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 when appropriate. For example, an energy storage system can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours.

[0074] To meet different power needs, a battery can include multiple battery cells, which can be connected in series, parallel, or in a mixed manner. A mixed manner refers to a combination of series and parallel connections.

[0075] The battery includes a casing and multiple battery cells, which are housed within the casing. The casing provides assembly space for the battery cells and can employ various structures. In some embodiments, the casing may include a first casing body and a second casing body, which overlap each other, collectively defining an assembly space for accommodating the battery cells. The second casing body may be a hollow structure open at one end, while the first casing body may be a plate-like structure, covering the open side of the second casing body to jointly define the assembly space. Alternatively, both the first and second casing bodies may be hollow structures open on one side, with the open side of the first casing body covering the open side of the second casing body. Of course, the casing formed by the first and second casing bodies can be of various shapes, such as a cylinder, a cuboid, etc.

[0076] In a battery, multiple battery cells can be connected in series, parallel, or a combination thereof. A combination thereof means that multiple battery cells are connected in both series and parallel configurations. Multiple battery cells can be directly connected in series, parallel, or a combination thereof, and then the entire assembly of these battery cells is housed within a casing. Alternatively, a battery can be composed of multiple battery cells first connected in series, parallel, or a combination thereof to form a battery module, and then these modules are connected in series, parallel, or a combination thereof to form a whole, which is also housed within a casing. The battery may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells.

[0077] This application discloses an explosion-proof valve 10, which is used in batteries.

[0078] The following is for reference. Figures 1-7 The explosion-proof valve 10 according to an embodiment of this application is described.

[0079] In some embodiments, such as Figures 1-4 As shown, the explosion-proof valve 10 includes: valve body 11, valve core 12, waterproof and breathable membrane 17, and electromagnetic assembly 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 ventilated channel 12111 that communicates with the pressure relief channel 1111; a waterproof and breathable membrane 17 is installed on the valve core 12, and the ventilated channel 12111 communicates with the outside through the waterproof and breathable membrane 17; the electromagnetic component 13 is disposed opposite to the valve core 12, and the electromagnetic component 13 is used to magnetically attract the valve core 12 in the energized state so that the valve core 12 seals the pressure relief channel 1111.

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

[0082] For example, such as Figure 4 As shown, the pressure relief channel 1111 extends through 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 facilitate its mating with the solenoid assembly 13 and enable accurate control of the opening and closing of the pressure relief passage 1111 during movement.

[0084] For example, such as Figure 4 As shown, the venting channel 12111 extends through the valve core 12 along the axial direction of the valve core 12 and is connected to the pressure relief channel 1111 inside the valve body 11.

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

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

[0087] For example, such as Figures 3-4 As shown, the waterproof and breathable membrane 17 is installed near the outlet of the breathable channel 12111. The waterproof and breathable membrane 17 can be fixed to the valve core 12 by means of pasting, pressing or snapping.

[0088] When the electromagnetic component 13 is energized, it generates an electromagnetic force that attracts the valve core 12 to move, thereby controlling the sealing state of the pressure relief channel 1111.

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

[0090] For example, such as Figure 4 As shown, the electromagnetic component 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 and breathable membrane 17.

[0091] In actual implementation, such as Figure 4As shown, under normal conditions, the electromagnetic component 13 is connected to the power supply. Under the magnetic force of the electromagnetic component 13, the valve core 12 presses 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 pressure difference between the inside and outside of the box through the following means: the gas inside and outside the box can exchange gases through the pressure relief channel 1111 and the ventilated channel 12111 connected to the pressure relief channel 1111. Furthermore, under the filtering effect of the waterproof and breathable membrane 17, moisture, dust and other impurities in the gas outside the box can be blocked. When the battery experiences thermal runaway, the electromagnetic component 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 release a large amount of pressure through the following means: the high-temperature and high-pressure gas inside the box 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. The outlet of the pressure relief channel 1111 is opened, and finally, the high-temperature and high-pressure gas can be discharged into the external environment in a short time.

[0092] The explosion-proof valve 10 provided in this application embodiment, through the setting of the above-mentioned magnetic components, realizes that under normal conditions, the magnetic components magnetically attract the valve core 12 to seal the pressure relief channel 1111 and only use the venting channel 12111 to balance the internal and external pressure difference. This solves the problem that the spring-type explosion-proof valve 10 is prone to abnormal opening when subjected to external disturbances under the 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. At the same time, it realizes that the magnetic force is released and the pressure relief channel 1111 opens under the battery thermal runaway state to help the high temperature and high pressure gas to be discharged quickly and in large quantities. This solves the problem that the spring-type explosion-proof valve 10 cannot open normally under the high elastic force design, so that the explosion-proof valve 10 can reach the maximum pressure relief area more quickly during thermal diffusion, achieving more efficient and more direct venting, accelerating the venting rate of the explosion-proof valve 10 during battery thermal runaway, thereby effectively optimizing the battery's safety protection performance.

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

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

[0095] like Figure 4As shown, the guide rod 121 is designed as a long strip, and one end of the guide rod 121 connected to the pressure cover 122 extends out into the pressure relief channel 1111. The pressure cover 122 is designed as a disc, 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 pressed.

[0096] The pressure cap 122 can be connected to the end of the guide rod 121 away from the electromagnetic component 13 by means of threads, snaps or bolts.

[0097] For example, in some embodiments, such as Figure 4 As shown, the end of the guide rod 121 facing away from the electromagnetic component 13 has an external thread structure, and the central area of ​​the pressure cap 122 is provided with a threaded hole that matches the external thread of the guide rod 121. In order to strengthen the fixed connection between the guide rod 121 and the pressure cap 122, anaerobic adhesive can be provided at the threaded connection.

[0098] The explosion-proof valve 10 provided in this application embodiment, through the design of the guide rod 121 and the pressure cap 122, when the electromagnetic component 13 is energized, the electromagnet 131 generates a strong electromagnetic force to attract the guide rod 121, thereby driving the pressure cap 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 the explosion-proof valve 10 opening abnormally under normal working conditions.

[0099] In some embodiments, such as Figures 3-4 As shown, the guide rod 121 includes a main rod body 1211 and a magnetic component 1212. The magnetic component 1212 is made of paramagnetic material and is installed at one end of the main rod body 1211 near the electromagnetic component 13.

[0100] The main rod 1211 can be made of high-strength, corrosion-resistant and rigid materials, 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 component 1212 is made of a paramagnetic material, such as iron, nickel, cobalt or their alloys, without limitation herein.

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

[0103] The magnetic component 1212 can be designed as a cylinder, a sheet, or other shape suitable for connection with the main rod 1211. The size and shape of the magnetic component 1212 can be determined according to the magnetic field distribution and attractive force requirements of the electromagnetic component 13.

[0104] The explosion-proof valve 10 provided in this application embodiment, through the setting of the main rod 1211 and the magnetic component 1212, facilitates the maintenance and replacement of the magnetic component 1212, reduces maintenance costs and extends the service life of the guide rod 121. Furthermore, the structural design of the magnetic component 1212 can be adjusted and optimized according to the magnetic field characteristics and attractive force requirements of the electromagnetic component 13 to adapt to different battery types and working environments, thereby increasing the diversity and flexibility of the explosion-proof valve 10 in design.

[0105] In some embodiments, such as Figures 3-4 As shown, the main rod body 1211 is provided with a first mounting groove facing the electromagnetic component 13, and the magnetic component 1212 is mounted in the first mounting groove.

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

[0107] In other embodiments, the magnetic component 1212 is fitted onto the end of the main rod 1211 facing away from the pressure cap 122 and is fixed by means of threads, snaps or fasteners.

[0108] In some other embodiments, the magnetic component 1212 is designed as an integral part of the main rod body 1211 and is directly manufactured by means of casting, forging or machining.

[0109] The explosion-proof valve 10 provided in this application embodiment, through the embedded installation structure design of the magnetic component 1212, can maintain close contact and stable connection between the magnetic component 1212 and the main rod body 1211, while reducing the detachment or displacement of the magnetic component 1212 under the action of electromagnetic force.

[0110] In some embodiments, such as Figure 3 As shown, the magnetic component 1212 has a ring structure, and the center line of the magnetic component 1212 coincides with the center line of the valve core 12.

[0111] Specifically, the ring structure may include, but is not limited to, circular rings, square rings, or other polygonal rings, etc., without limitation here.

[0112] For example, such as Figure 3 As shown, the magnetic component 1212 is designed as a ring.

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

[0114] Understandably, since the centerline of the magnetic component 1212 coincides with the centerline of the valve core 12, in other words, the magnetic component 1212 and the valve core 12 are designed to be aligned, when the electromagnetic component 13 attracts the magnetic component 1212, the guide rod 121 can be subjected to a uniform magnetic attraction force along the circumference. Therefore, the compressive stress borne by the sealing surface between the gland 122 and the valve body 11 can be evenly distributed along the circumference, which alleviates the leakage problem caused by uneven force on the gland 122.

[0115] The explosion-proof valve 10 provided in this application embodiment, through the design of the magnetic component 1212 as a ring structure, enables the magnetic component 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 that the center line of the magnetic component 1212 coincides with the center line of the valve core 12, the compressive stress borne by the sealing surface between the gland 122 and the valve body 11 can be evenly distributed along the circumference, which helps to optimize the sealing effect of the gland 122.

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

[0117] Specifically, the guide rod 121 can be made of paramagnetic materials such as iron, nickel, cobalt or their alloys, which 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 this application embodiment adopts an integral molding design for the guide rod 121, that is, the entire guide rod 121 is made of a single paramagnetic material, eliminating the need for additional magnetic components 1212, simplifying the structure and reducing the number of parts, thereby reducing manufacturing costs and complexity.

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

[0121] An electromagnet 131 is located inside the valve body 11; a suction cup 132 is located inside the valve body 11 and is connected to the electromagnet 131. The suction cup 132 is used to block the venting channel 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 channel 1111 and the venting channel 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 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 as cylindrical or rectangular to match the shape of the pressure relief channel 1111. The coil 1312 is wound on 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 can be made of a non-magnetic material with a certain strength and corrosion resistance, such as stainless steel or aluminum alloy.

[0125] The suction cup 132 is designed to match the shape of the electromagnet 131, and can be disc-shaped or rectangular, etc., without limitation.

[0126] For example, in some embodiments, such as Figures 4-6 As shown, suction cup 132 is designed in the shape of a disc.

[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, such as Figure 4 As shown, when the electromagnet 131 is energized, the magnetic component 1212 is attracted to the suction cup 132, causing the suction cup 132 to block the opening of the venting channel 12111 away from the waterproof and breathable membrane 17. Since the suction cup 132 is provided with a first exhaust hole 1321, the length of the first exhaust hole 1321 must be greater than the radial width of the magnetic component 1212. In this way, the pressure relief channel 1111 can be connected to the venting channel 12111 through the first exhaust hole 1321. Under normal conditions, the gas inside the box and the outside gas can exchange through the pressure relief channel 1111 and the venting channel 12111 to balance the pressure difference.

[0130] The shape of the first exhaust port 1321 can be cuboid, semi-cylindrical, or prism, etc., and there is no restriction here.

[0131] For example, in some embodiments, such as Figures 5-6 As shown, the first exhaust port 1321 is semi-cylindrical in shape.

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

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

[0134] The explosion-proof valve 10 provided in this application embodiment, through the above-mentioned electromagnet 131 and 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 electromagnetic force, effectively blocking the venting channel 12111 and preventing a large amount of gas leakage. In addition, the design of the first exhaust hole 1321 also enables the suction cup 132 to release pressure while blocking the venting channel 12111, providing structural support for the bidirectional venting function of the explosion-proof valve 10 under normal working conditions.

[0135] In some embodiments, such as Figures 2-4 As shown, the explosion-proof valve 10 also includes a protective cover 14.

[0136] The protective cover 14 is located inside the valve body 11. The protective cover 14 forms a first cavity 141 that communicates with the pressure relief channel 1111 and the first exhaust port 1321. The protective cover 14 is connected to the valve body 11. The electromagnet 131 passes through the protective cover 14. The suction cup 132 is located in the first cavity 141.

[0137] In this embodiment, such as Figures 3-4 As shown, the protective cover 14 is located in the pressure relief channel 1111. The side of the protective cover 14 away from the electromagnetic component 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 that is open in the direction of the pressure cap 122. The first cavity 141 is connected to the pressure relief channel 1111 through the opening. The suction cup 132 is located inside the protective cover 14. The end of the electromagnet 131 near the valve core 12 may have an external thread structure. Both the suction cup 132 and the protective cover 14 may have threaded holes that mate with the external thread structure of the electromagnet 131.

[0138] The explosion-proof valve 10 provided in this application embodiment, through the setting of the above-mentioned protective cover 14, the protective cover 14, as an independent component inside the valve body 11, provides a stable installation platform for the electromagnetic component 13 through a firm connection with the valve body 11, which helps to reduce the risk of the electromagnetic component 13 loosening 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 component 13.

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

[0140] The main body 111 forms a pressure relief channel 1111; the reinforcing structure 112 is connected to the inner wall of the main body 111, the reinforcing structure 112 is sleeved on the valve core 12, and the reinforcing 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. The reinforcing structure 112 can include a ring structure and a plurality of connecting ribs that are circumferentially separated outside the ring structure. The axial direction of the ring structure coincides with the axial direction of the main body 111. The connecting ribs can be connected between the outer side wall of the ring structure and the inner side wall of the main body 111.

[0142] In this context, "multiple" refers to two or more. For example, in some embodiments, the reinforcing structure 112 may include a ring structure and three connecting ribs arranged circumferentially outside the ring structure.

[0143] In this embodiment, the annular structure can restrict the radial displacement of the valve core 12 by being sleeved on 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 component 13 is de-energized. The protective cover can be fixedly connected to the side of the connecting rib away from the pressure cover 122 by means of adhesive, welding, threaded connection or snap-fit.

[0144] The explosion-proof valve 10 provided in this application embodiment, through the above-mentioned main body 111 and reinforcing structure 112, the reinforcing 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 significantly improve the overall load-bearing capacity of the valve body 11, reducing the risk of structural deformation or damage caused by vibration or impact.

[0145] In some embodiments, such as Figures 3-4 As shown, the explosion-proof valve 10 also includes an elastic element 18.

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

[0147] The elastic element 18 may include, but is not limited to, a coil spring, a leaf spring, a rubber ring, or a silicone pad, etc., without limitation.

[0148] For example, in some embodiments, such as Figures 3-4 As shown, the elastic element 18 is a helical spring.

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

[0150] In actual implementation, such as Figure 4 As shown, under normal conditions, the electromagnetic component 13 is connected to the power supply. Under the action of the magnetic force of the electromagnetic component 13 combined with the elastic force provided by the elastic element 18, the valve core 12 presses against the valve body 11 to seal the outlet of the pressure relief channel 1111. When the battery experiences thermal runaway, the electromagnetic component 13 is disconnected from the power supply. As the magnetic force is released, the elastic force is insufficient to withstand the impact of the high-temperature and high-pressure gas inside the box. The high-temperature and high-pressure gas can easily continue to compress the elastic element 18, making the gap between the pressure cap 122 and the valve body 11 larger and larger. As the high-temperature and high-pressure gas is continuously released, the pressure inside the box gradually decreases until it reaches equilibrium with the external environment. The valve core 12 begins to reset under the action of the elastic element 18, and the pressure cap 122 re-fits against the valve body 11. At this time, the electromagnetic component 13 will not resume power supply. The resealing by the elastic element 18 can prevent water and other impurities from entering the box in large quantities in special circumstances (such as water spraying) before battery maintenance.

[0151] The explosion-proof valve 10 provided in this application embodiment, through the setting of the above-mentioned elastic element 18, the low-elasticity elastic element 18 can reseal the explosion-proof valve 10 after the battery thermal runaway exhaust weakens, so as to prevent foreign objects from entering the box and stimulating the battery cells to undergo thermal, electrical and chemical reactions under special circumstances.

[0152] In some embodiments, such as Figures 3-4 As shown, the explosion-proof valve 10 also includes a pressure ring 19.

[0153] The valve core 12 has a second mounting groove on the side away from the electromagnetic assembly 13. The waterproof and 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 and breathable membrane 17 against the valve core 12.

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

[0155] The pressure ring 19 can be installed in the second mounting slot by means of interference fit, threaded connection or snap-fit, etc., and there is no restriction here.

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

[0157] In this embodiment, such as Figure 4 As shown, the waterproof and breathable membrane 17 can be clamped between the pressure ring 19 and the bottom wall of the second mounting groove. The waterproof and 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 and 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 this application embodiment uses the aforementioned pressure ring 19 to press the waterproof and breathable membrane 17 against the valve core 12. Combined with the embedded installation design, it can maintain a tight contact and stable connection between the pressure cap 122, the pressure ring 19, and the waterproof and breathable membrane 17, reducing the detachment or displacement of the pressure ring 19 and the waterproof and breathable membrane 17. This effectively improves the sealing performance between the waterproof and breathable membrane 17 and the valve core 12, further reducing the entry of external moisture and impurities into the housing.

[0159] In some embodiments, such as Figure 4 As shown, the bottom wall of the second mounting groove is provided with a boss 1221, the waterproof and breathable membrane 17 is fixedly connected to the boss 1221, and the edge of the waterproof and 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 and breathable membrane 17. The boss 1221 can be cylindrical, square or other suitable shapes.

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

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

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

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

[0165] In some embodiments, such as Figures 1-4 As shown, the explosion-proof valve 10 also 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 that communicates with the venting channel 12111. A third cavity 22 is formed between the valve cover 15 and the valve body 11, and a pressure relief port 23 communicates with the third cavity 22. The valve cover 15 is provided with a second exhaust port 151 for communicating with 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, snap-fit ​​or riveting, etc., and there is no restriction here.

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

[0169] The shape of the second exhaust port 151 may include, but is not limited to, a circle, a square, an oval, or other shapes, and is not restricted here.

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

[0171] Multiple second exhaust ports 151 can be provided, where multiple means two or more.

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

[0173] In actual operation, under normal conditions, the gas inside the enclosure can sequentially pass through the pressure relief channel 1111, the first cavity 141, the venting channel 12111, the second cavity 21, the second exhaust port 151, and the third cavity 22, and finally exit from the pressure relief port 23. External gas can first enter the pressure relief port 23, and then sequentially pass through the third cavity 22, the second exhaust port 151, the second cavity 21, the venting channel 12111, the first cavity 141, and the pressure relief channel 1111 to enter the enclosure, thus achieving normal gas exchange between the inside and outside. In the event of thermal runaway, the high-temperature, high-pressure gas inside the enclosure can first enter the pressure relief channel 1111, then the third cavity 22, and finally be discharged from the pressure relief port 23.

[0174] It should be noted that when the battery experiences thermal runaway, the valve core 12 is pushed upwards. Although the exhaust path where the vent channel 12111 is located is also in a conductive state, the exhaust path where the vent channel 12111 is located is of little use because the pressure relief channel 1111 is almost completely open at this time. Furthermore, 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 this application embodiment, through the setting of the valve cover 15, combined with the design of the second cavity 21, the third cavity 22 and the pressure relief port 23, forms an efficient and clear exhaust path. The existence of the third cavity 22 is equivalent to a pressure buffer zone, which can alleviate the impact force of high-pressure gas to a certain extent, making the pressure relief process more stable and controllable when the battery thermally runs away, and reducing the impact force and destructive force caused by the sudden release of high-pressure gas.

[0176] In some embodiments, such as Figures 3-4 As shown, the explosion-proof valve 10 also includes a valve element 16.

[0177] The valve element 16 is installed inside the valve core 12. The valve element 16 blocks the ventilation channel 12111. The valve element 16 forms a flow channel 161 and a flow gap 162. It is configured to open the flow gap 162 when a pressure difference occurs on both sides so that the two sides of the flow channel 161 are connected to the ventilation channel 12111.

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

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

[0180] The flow channel 162 can pass through the valve element 16 along the axial direction of the valve body 11. The flow channel 162 can be provided in one or more ways, where "more" means two or more.

[0181] For example, in some embodiments, such as Figure 4 As shown, the valve element 16 forms a flow slit 162.

[0182] Understandably, when a pressure difference occurs on both sides of the valve component 16, the flow gap 162 can be opened to achieve bidirectional flow between the flow channel 161 and the ventilation channel 12111. For example, when the internal pressure is higher than the external pressure, the flow gap 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 housing.

[0183] In some embodiments, such as Figures 3-4 As shown, the explosion-proof valve 10 also includes a first sealing element 24.

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

[0185] The first sealing element 24 may include a sealing ring, sealant, or gasket, etc., without limitation.

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

[0187] like Figures 3-4 As shown, a fourth mounting groove that opens toward the gland 122 can be provided on the valve body 11, and the first seal 24 can be installed in the fourth mounting groove.

[0188] By setting the first sealing element 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, such as Figures 1-4 As shown, the explosion-proof valve 10 also includes a second sealing element 25.

[0190] The second seal 25 is used to elastically compress between the battery casing and the valve body 11.

[0191] The second seal 25 may include a sealing ring, sealant, or gasket, etc., without limitation.

[0192] For example, in some embodiments, such as Figures 1-4 As shown, the second seal 25 is a sealing ring.

[0193] like Figures 3-4 As shown, a fifth mounting groove can be provided on the valve body 11, which opens in the direction away from the pressure cover 122. When the explosion-proof valve 10 is assembled in the housing, 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 housing. The second sealing member 25 and the housing are clamped between the valve body 11 and the nut. The nut is engaged with the external thread structure of the valve body 11, and the nut is located inside the housing. The nut acts as a fastener and abuts against the inner wall of the housing.

[0194] With the second seal 25 provided, the second seal 25 is tightly clamped between the valve body 11 and the housing, forming a sealed interface, which can effectively reduce gas leakage from the gap between the housing and the valve body 11 and improve the overall sealing performance.

[0195] This application also discloses a battery.

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

[0197] Multiple battery cells are housed within the enclosure; an explosion-proof valve 10 is installed within the enclosure.

[0198] The battery provided in this application embodiment, through the aforementioned explosion-proof valve 10, achieves the balance of internal and external pressure difference by using only the venting channel 12111 with the magnetic suction valve core 12 of the magnetic component in normal state to seal the pressure relief channel 1111. This solves the problem that the spring-type explosion-proof valve 10 is prone to abnormal opening when subjected to external disturbances under the low elastic force design, significantly improving the sealing performance of the explosion-proof valve 10 under normal conditions, thereby enhancing the reliability of the explosion-proof valve 10. At the same time, it enables the magnetic force to be released and the pressure relief channel 1111 to open under the thermal runaway state of the battery, helping to quickly and massively discharge high-temperature and high-pressure gases. This solves the problem that the spring-type explosion-proof valve 10 cannot open normally under the high elastic force design, allowing the explosion-proof valve 10 to reach the maximum pressure relief area more quickly during thermal diffusion, achieving more efficient and direct venting, accelerating the venting 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 includes a control system.

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

[0201] In actual operation, the control system can monitor key parameters such as temperature, voltage, and current of the battery pack in real time, thereby identifying potential thermal runaway risks. When the temperature of a battery cell exceeds the 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 to the electromagnetic component 13 according to the preset logic judgment rules. Once the power supply is cut off, the control system will send a control signal to the electromagnetic component 13 to quickly de-energize it and close the auxiliary closing function of the explosion-proof valve 10, so that the explosion-proof valve 10 can be opened by the high temperature and high pressure gas inside the box.

[0202] The battery provided in this application embodiment, through the functional design of the above-described control system, can identify the state of multiple battery cells and control the circuit channel of the electromagnetic component 13 to realize the opening and closing of the explosion-proof valve 10 auxiliary closing function. It can detect the thermal runaway of the battery cell 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 optimization of the battery's safety protection performance.

[0203] This 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 this application embodiment, through the aforementioned battery configuration, enables the magnetic component magnetic suction valve core 12 to balance the internal and external pressure difference under normal conditions by using only the venting channel 12111 to seal the pressure relief channel 1111. This solves the problem that the spring-type explosion-proof valve 10 is prone to abnormal opening when subjected to external disturbances under low elasticity design, significantly improving the sealing performance of the explosion-proof valve 10 under normal conditions, thereby enhancing the reliability of the explosion-proof valve 10. At the same time, it enables the magnetic force to be released and the pressure relief channel 1111 to open under battery thermal runaway conditions to help the high-temperature and high-pressure gas to be discharged quickly and in large quantities, solving the problem that the spring-type explosion-proof valve 10 cannot open normally under high elasticity design. This allows the explosion-proof valve 10 to reach the maximum pressure relief area more quickly during thermal diffusion, achieving more efficient and direct venting, accelerating the venting rate of the explosion-proof valve 10 during battery thermal runaway, thereby effectively optimizing the battery's safety protection performance.

[0206] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0207] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

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

[0209] In the description of this application, "multiple" means two or more.

[0210] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0211] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0212] Other configurations of the embodiments of this application, such as ... and ..., and operations, are known to those skilled in the art and will not be described in detail here.

[0213] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

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

Claims

1. An explosion-proof valve, used in batteries, characterized in that, include: The valve body forms a pressure relief channel; The valve core is installed in the valve body and has a vent passage communicating with the pressure relief passage; A waterproof and breathable membrane is installed on the valve core, and the breathable channel is connected to the outside through the waterproof and breathable membrane; An electromagnetic component, disposed opposite to the valve core, is used to magnetically attract the valve core when energized, thereby sealing the pressure relief channel. The valve core includes a guide rod and a pressure cap. The guide rod is installed in the pressure relief channel to form the venting channel. The pressure cap is connected to the end of the guide rod away from the electromagnetic component and is configured to press against the valve body to seal the pressure relief channel when the electromagnetic component is energized. The electromagnetic component includes an electromagnet and a suction cup. The electromagnet is disposed within the valve body. The suction cup is disposed within the valve body and connected to the electromagnet, used to block the venting channel when the electromagnet is energized, and has a first exhaust port for connecting the pressure relief channel and the venting channel. A protective cover is disposed within the valve body and forms a first cavity communicating with the pressure relief channel and the first exhaust port. 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. The protective cover is located within the pressure relief channel, and the side of the protective cover facing away from the electromagnetic component is connected to the valve body. The protective cover is a cylindrical structure open on one side, forming the first cavity open towards the pressure cap. The first cavity communicates with the pressure relief channel through the opening. The suction cup is located inside the protective cover. The end of the electromagnet near the valve core has an external thread structure. Both the suction cup and the protective cover have threaded holes that mate with the external thread structure.

2. The explosion-proof valve according to claim 1, characterized in that, The guide rod includes a main rod body and a magnetic component. The magnetic component is made of a paramagnetic material and is installed on one end of the main rod body near the electromagnetic component.

3. The explosion-proof valve according to claim 2, characterized in that, The main rod body is provided with a first mounting groove facing the electromagnetic component, and the magnetic component is mounted in the first mounting groove.

4. The explosion-proof valve according to claim 2, characterized in that, The magnetic component has a ring structure, and the center line of the magnetic component coincides with the center line of the valve core.

5. The explosion-proof valve according to claim 1, characterized in that, The guide rod is made of a paramagnetic material.

6. The explosion-proof valve according to claim 1, characterized in that, The valve body includes: The main body forms the pressure relief channel; A reinforced structure is attached to the inner wall of the main body, fitted onto the valve core, and connected to the protective cover.

7. The explosion-proof valve according to any one of claims 1-6, characterized in that, Also includes: An elastic element is sleeved on the valve core and elastically connected between the valve core and the valve body.

8. The explosion-proof valve according to any one of claims 1-6, characterized in that, Also includes: A pressure ring is provided, and the valve core has a second mounting groove on the side opposite to the electromagnetic component. The waterproof and breathable membrane and the pressure ring are installed in the second mounting groove, and the pressure ring is used to press the waterproof and breathable membrane against the valve core.

9. The explosion-proof valve according to claim 8, characterized in that, The bottom wall of the second mounting groove is provided with a boss, the waterproof and breathable membrane is fixedly connected to the boss, and the edge of the waterproof and breathable membrane is clamped between the pressure ring and the boss.

10. The explosion-proof valve according to any one of claims 1-6, characterized in that, Also includes: A valve cover is connected to the valve core to form a second cavity communicating with the venting channel. A third cavity is formed between the valve cover and the valve body, and a pressure relief port communicating with the third cavity is formed. The valve cover is provided with a second vent hole for communicating with the second cavity and the third cavity.

11. The explosion-proof valve according to any one of claims 1-6, characterized in that, Also includes: A valve element, installed inside the valve core, blocks the venting channel. The valve element forms a flow channel and a flow gap, and is configured to open the flow gap when a pressure difference occurs on both sides, so that the two sides of the venting channel are connected to the venting channel.

12. The explosion-proof valve according to any one of claims 1-6, characterized in that, The explosion-proof valve also includes: The first sealing element is elastically compressed between the valve core and the valve body; And / or, The explosion-proof valve also includes: The second seal is used to elastically compress between the battery housing and the valve body.

13. A battery, characterized in that, include: Box; Multiple battery cells are housed within the housing; The explosion-proof valve as described in any one of claims 1-12 is installed in the housing.

14. The battery according to claim 13, characterized in that, Also includes: The control system is electrically connected to the electromagnetic component of the explosion-proof valve and the plurality of battery cells, and is used to cut off the power supply to the electromagnetic component when thermal runaway of the battery cell is detected.

15. An electrical appliance, characterized in that, include: The battery as described in claim 13 or 14.

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