Battery explosion-proof valve, battery plug-in box and electric apparatus

Abstract

To provide: a battery explosion-proof valve which is short in response time and capable of injecting a fire extinguishing medium into a battery plug in-box to extinguish fire at once, without delaying a fire extinguishing timing; and a battery plug-in box.SOLUTION: A battery explosion-proof valve includes: a fire extinguishing medium pipeline 103 having a medium outlet 108 to which a protective film 104 to block a fire extinguishing medium in the fire extinguishing medium pipeline is connected; and a housing 101 that has a cavity 111 and a first opening and a second opening communicated with the cavity, one end of the fire extinguishing medium pipeline being fitted in the first opening, the cavity being provided with a piercing member 109 that is movable relative to the fire extinguishing medium pipeline to pierce the protective film, the cavity being fitted to be communicated with an inner cavity of a battery plug-in box through the second opening.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to the field of battery technology, in particular to a battery explosion-proof valve, a battery plug-in box and electrical equipment. [Background technology]

[0002] Normally, the battery plug-in box is equipped with an explosion-proof valve, when the battery cell undergoes thermal runaway, it will suddenly release a large amount of gas and heat, causing the air pressure and temperature inside the battery plug-in box to rise rapidly, if it is not released immediately, the case will explode and cause further damage, the explosion-proof valve can solve this problem, and further inject a fire extinguishing medium into the battery plug-in box through the explosion-proof valve to extinguish the fire and prevent the fire from spreading further.

[0003] In conventional technology, when a fire extinguishing medium is injected into the inside of the battery plug-in box through a ruptured explosion-proof valve, the flow rate of the fire extinguishing medium may slow down or the medium may not be able to flow into the battery plug-in box, making it impossible to immediately extinguish the fire in the battery plug-in box.

[0004] Furthermore, if a battery cell experiences thermal runaway or explosion, it takes a long time to activate the fire extinguishing measures, and so with conventional battery explosion prevention valves, it is not possible to quickly inject a fire extinguishing medium into the battery plug-in box to extinguish the fire. This means that the timing of the fire extinguishing is likely to be delayed, leading to damage to the battery or the fire spreading to other batteries in the battery plug-in box, resulting in further losses. Summary of the Invention

[0005] The present invention aims to solve at least to some extent one of the technical problems in the related art, and thus, an embodiment of one aspect of the present invention provides a battery explosion-proof valve that has a shorter reaction time than conventional fire extinguishing solutions, and can inject a fire extinguishing medium into the battery plug-in box at the first time to extinguish the fire without incurring a delay in the timing of extinguishing the fire.

[0006] An embodiment of the present invention further provides a battery plug-in box equipped with the above battery explosion-proof valve.

[0007] An embodiment of the present invention further provides an electrical device comprising the above battery plug-in box.

[0008] A battery explosion-proof valve according to an embodiment of the present invention comprises: an extinguishing medium pipe having a medium outlet connected to a protective membrane for blocking the extinguishing medium in the extinguishing medium pipe; a housing having a cavity and a first opening and a second opening communicating with the cavity, wherein one end of the extinguishing medium pipe is fitted into the first opening, the cavity is provided with a puncture member movable relative to the extinguishing medium pipe so as to break through the protective membrane, and the cavity is adapted to communicate with an inner cavity of a battery plug-in box via the second opening.

[0009] The battery explosion-proof valve of the present application is provided with a puncture member on the housing and a protective membrane on the extinguishing medium pipe. If an explosion occurs inside the battery plug-in box, the protective membrane is pierced by the puncture member, opening the extinguishing medium pipe and allowing the extinguishing medium to be injected into the battery plug-in box at the earliest opportunity to extinguish the fire. This has a shorter reaction time than conventional fire extinguishing solutions and does not cause a delay in the timing of extinguishing the fire, preventing further damage to the battery and the spread to other batteries in the battery plug-in box, and limiting losses in a timely manner.

[0010] In some embodiments, the puncture member comprises a support plate and a puncture needle, the puncture needle being connected to the support plate movable relative to the extinguishing medium pipe so as to pierce the protective membrane. This embodiment provides a puncture member, and when an explosion occurs in the battery plug-in box, the puncture needle pierces the protective membrane to open the extinguishing medium pipe.

[0011] In some embodiments, the support plate is connected to the housing, and the housing is slidably connected to the extinguishing medium pipe. This embodiment provides a structure that allows the puncture needle to pierce the protective membrane, and when an explosion occurs in the battery plug-in box, the gas discharged from the battery plug-in box collides with the support plate of the housing, and the housing slides, causing the puncture needle to pierce the protective membrane.

[0012] In some embodiments, the housing has a first critical position and a second critical position with respect to the extinguishing medium pipe, and in the first critical position, the support plate abuts against the extinguishing medium pipe to block the medium outlet, and in the second critical position, the support plate is separated from the medium outlet. This embodiment provides a housing structure that can release pressure and extinguish fire, and when the housing is hit at the first critical position by the gas discharged from the battery plug-in box, the puncture needle breaks through the protective film of the extinguishing medium pipe, and then the support plate blocks the medium outlet. After the pressure release of the battery plug-in box is completed, the housing can return to the second critical position, and at this time, the extinguishing medium in the extinguishing medium pipe can flow into the battery plug-in box.

[0013] In some embodiments, the battery explosion-proof valve further includes a protective cover and an elastic member, the protective cover is attached to the outside of the housing, one end of the elastic member is connected to the inside of the protective cover, and the other end of the elastic member is connected to the housing, and the elastic member presses the housing toward the second critical position. This embodiment provides a structure for returning the housing to its initial position, and can utilize the elastic force of a spring to return the housing to the second critical position, thereby realizing automatic return of the housing.

[0014] In some embodiments, the bottom of the housing is provided with a seal ring surrounding the second opening. The housing is hermetically fitted into a battery plug-in box.

[0015] In some embodiments, the material of the sealing ring is ethylene propylene rubber foam.

[0016] In some embodiments, the extinguishing medium line is fitted with a sealing sleeve, the sealing sleeve being slidably mounted in the first opening, the sealing sleeve providing a certain damping to the sliding of the housing and ensuring a tight seal between the housing and the extinguishing medium line during the sliding process.

[0017] In some embodiments, the protective coating is made of an aluminum alloy.

[0018] A battery plug-in box according to an embodiment of the present invention comprises a housing having a first mounting port, a battery explosion-proof valve as described in any one of claims 1 to 9 is attached to the first mounting port, the housing is positioned outside the housing, the housing and the housing are capable of being attached to and detached from each other, and when the housing and the housing are separated, a pressure release passage is formed between the housing and the housing.

[0019] The present application uses a battery plug-in box equipped with the above-mentioned battery explosion-proof valve, which provides a pressure release passage while allowing the fire extinguishing medium to be injected into the battery plug-in box at the earliest possible time to extinguish the fire. This has a shorter reaction time than existing fire extinguishing solutions and does not lead to a delay in the timing of extinguishing the fire, thereby preventing further damage to the battery and the spread of the damage to other batteries in the battery plug-in box, and thus reducing losses in a timely manner.

[0020] In some embodiments, the battery plug-in box further includes an auxiliary explosion-proof valve, the housing having a second mounting port, an auxiliary explosion-proof valve attached to the second mounting port, the auxiliary explosion-proof valve having a cover plate mounting port and an exhaust port, a skeleton fixedly attached to the second mounting port, the exhaust port communicating with the second mounting port, a cover plate hermetically attached to the cover plate mounting port and having an exhaust passage, and a waterproof, gas-permeable membrane attached to the exhaust passage so that gas generated from the battery cell under normal conditions is discharged to the outside of the housing through the waterproof, gas-permeable membrane, and gas generated in the event of thermal runaway of the battery cell breaks through the waterproof, gas-permeable membrane and is discharged to the outside of the housing.

[0021] The auxiliary explosion-proof valve is equipped with a waterproof gas-permeable membrane to balance the air pressure inside the battery box. After the battery explosion-proof valve bursts, the puncture needle breaks through the protective membrane and the auxiliary explosion-proof valve releases the pressure, so that the extinguishing medium in the extinguishing medium pipe can directly flow into the battery box to extinguish the fire, and there is no problem of the extinguishing medium slowing down or being unable to flow into the battery box.

[0022] In some embodiments, the battery plug-in box further comprises a thermally responsive expansion sealant, the thermally responsive expansion sealant being disposed at a low end of the skeleton to seal the exhaust vent after the thermally responsive expansion sealant thermally expands.

[0023] When a battery cell experiences thermal runaway, the temperature rises and the high-temperature gas passes through the battery explosion-proof valve, gradually heating the thermally reactive expansion sealant. The heated thermally reactive expansion sealant expands and blocks the exhaust port, preventing the extinguishing medium from leaking out through the auxiliary explosion-proof valve.

[0024] In some embodiments, the first and second mounting ports are both located at the top of the housing. When the fire extinguishing medium is injected into the battery plug-in box, even if the battery explosion-proof valve is in an open state, the fire extinguishing medium does not overflow in a short time.

[0025] In some embodiments, the material of the heat-reactive expansion sealant is a heat-reactive expansion foam material. When the pressure in the battery plug-in box reaches the explosion-proof pressure of the battery explosion-proof valve, the battery explosion-proof valve will explode, but the auxiliary explosion-proof valve is provided with a waterproof gas-permeable membrane, so that it can provide a pressure relief function. When the pressure in the battery plug-in box reaches the explosion-proof pressure of the auxiliary explosion-proof valve, both the battery explosion-proof valve and the auxiliary explosion-proof valve will explode.

[0026] An electrical device according to an embodiment of the present invention includes the battery plug-in box described above. [Brief description of the drawings]

[0027] The above and / or additional aspects and advantages of the present invention will become apparent from and be easily understood after reading the following detailed description of the embodiments with reference to the accompanying drawings. [Figure 1] 1 is a schematic diagram showing the internal configuration of a battery explosion-proof valve according to an embodiment of the present application. [Diagram 2] FIG. 2 is a schematic configuration diagram of a housing in FIG. [Diagram 3] 1 is a schematic external configuration diagram of a battery explosion-proof valve according to an embodiment of the present application. [Figure 4] FIG. 2 is a schematic configuration diagram of a battery plug-in box according to an embodiment of the present application. [Diagram 5] 1 is a schematic internal configuration diagram of an auxiliary explosion-proof valve according to an embodiment of the present application. [Figure 6] FIG. 2 is a schematic diagram of the expansion of the thermal reaction expansion seal material of the auxiliary explosion-proof valve of the embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] Hereinafter, the embodiments of the present invention will be described in detail. An example of these embodiments is shown in the drawings. The embodiments described below with reference to the attached drawings are illustrative and are for explaining the present invention, and should not be understood as limiting the present invention.

[0029] BEST MODE FOR CARRYING OUT THE DISCLOSURE Hereinafter, a battery explosion-proof valve according to an embodiment of the present invention will be described with reference to the drawings.

[0030] As shown in Figures 1 to 3, an embodiment of an aspect of the present application provides a battery explosion-proof valve 1, which includes an extinguishing medium pipe 103 having a medium outlet 108 connected to a protective membrane 104 for blocking the extinguishing medium in the extinguishing medium pipe 103, and a housing 101. The housing 101 has a cavity 111, a first opening 112 and a second opening 113 communicating with the cavity 111, one end of the extinguishing medium pipe 103 is fitted into the first opening 112, the cavity 111 is provided with a piercing member movable relative to the extinguishing medium pipe 103 to break through the protective membrane 104, and the cavity 111 is adapted to communicate with the inner cavity of the battery plug-in box 3 through the second opening 113.

[0031] The battery explosion-proof valve 1 of the present application is provided with a puncture member on the housing 101, and a protective membrane 104 is installed on the extinguishing medium pipe 103. In the event of an explosion inside the battery plug-in box 3, the puncture member pierces the protective membrane 104, opening the extinguishing medium pipe 103, and the extinguishing medium can be injected into the battery plug-in box 3 at the earliest opportunity to extinguish the fire. This has a shorter reaction time than conventional fire extinguishing methods, does not cause a delay in the timing of extinguishing the fire, prevents further damage to the battery, and prevents the damage from spreading to other batteries in the battery plug-in box 3, thereby limiting losses in a timely manner.

[0032] The battery explosion-proof valve 1 of the present application can be used repeatedly, saving costs, with a reliable structure and excellent durability. When repeated use is required, the protective film 104 only needs to be replaced.

[0033] In some embodiments, the puncturing member comprises a support plate 110 and a puncturing needle 109, the puncturing needle 109 is connected to the support plate 110 which is movable relative to the extinguishing medium pipe 103 so as to pierce the protective membrane 104. This embodiment provides a puncturing member, and when an explosion occurs in the battery plug-in box 3, the puncturing needle 109 pierces the protective membrane 104, thereby making the extinguishing medium pipe 103 conductive.

[0034] In some embodiments, the support plate 110 is connected to the housing 101, and the housing 101 is slidably connected to the extinguishing medium pipe 103. This embodiment provides a structure that allows the puncture needle 109 to pierce the protective film 104, and when an explosion occurs inside the battery plug-in box 3, gas discharged from the battery plug-in box 3 collides with the support plate 110 of the housing 101, and the housing 101 slides, causing the puncture needle 109 to pierce the protective film 104.

[0035] In some alternative embodiments, the puncture member can also be slidingly connected to the housing 101, and when an explosion occurs within the battery plug-in box 3, the gas discharged out of the battery plug-in box 3 collides with the pallet 110, causing the puncture member to slide vertically upwards relative to the housing 101, and the puncture needle 109 breaks through the protective membrane 104.

[0036] In some embodiments, the housing 101 has a first critical position and a second critical position with respect to the extinguishing medium pipe 103, and in the first critical position, the support plate 110 abuts against the extinguishing medium pipe 103 to block the medium outlet 108, and in the second critical position, the support plate 110 is separated from the medium outlet 108, and the medium outlet 108 communicates with the first mounting port 301. This embodiment provides a housing 101 structure that can release pressure and extinguish fire, and when the housing 101 is hit at the first critical position by the gas discharged from the battery plug-in box 3, the puncture needle 109 breaks through the protective film 104 of the extinguishing medium pipe 103, and then the support plate 110 blocks the medium outlet 108. After the pressure release of the battery plug-in box 3 is completed, the housing 101 can return to the second critical position, and at this time, the fire extinguishing medium in the fire extinguishing medium pipe 103 can flow into the battery plug-in box 3.

[0037] In some embodiments, the battery explosion-proof valve 1 of the embodiments of the present invention further includes a protective cover 106 and an elastic member 105. The protective cover 106 is attached to the outside of the housing 101. One end of the elastic member 105 is connected to the inside of the protective cover 106, and the other end of the elastic member 105 is connected to the housing 101. The elastic member 105 presses the housing 101 toward the second critical position. This embodiment provides a structure for returning the housing 101 to the initial position, and by utilizing the elastic force of the spring, the housing 101 can be returned to the second critical position, realizing the automatic return of the housing 101.

[0038] Furthermore, the elastic member 105 is a spring.

[0039] Furthermore, the protective cover 106 has a semi-surrounding structure with an outer shape like the Chinese character "ji". The part penetrating the outside of the protective cover 106 is used for pressure relief and the protrusion of the fire extinguishing medium pipeline 103.

[0040] In some embodiments, a sealing ring 107 is provided at a position surrounding the second opening 113 at the bottom of the housing 101. The housing 101 is hermetically fitted into the battery plug-in box 3. In the normal state, the battery explosion-proof valve 1 presses down the housing 101 by the pressure of the spring, presses the sealing ring 107, and the housing 101 and the sealing ring 107 form a sealed space above the battery plug-in box 3.

[0041] Furthermore, the thickness of the sealing ring 107 is 2 to 5 mm, and the compression amount is 30% to 50%.

[0042] In some embodiments, the material of the sealing ring 107 is ethylene propylene rubber foam.

[0043] In some embodiments, the sealing ring 107 may be fixedly connected to the upper end surface of the battery plug-in box 3 or may be fixedly connected to the lower end surface of the housing 101.

[0044] In some embodiments, a pressing plate is formed on the outer periphery of the lower end of the housing 101 to press against the seal ring 107 to create a tight seal between the inside of the housing 101 and the battery plug-in box 3 .

[0045] Furthermore, the outer periphery of the pressing plate and the outer periphery of the seal ring 107 are both rectangular.

[0046] In some embodiments, the extinguishing medium pipe 103 is fitted with a sealing sleeve 102, which is slidably mounted in the first opening 112. The sealing sleeve 102 provides a certain damping to the sliding of the housing 101 and ensures a tight seal between the housing 101 and the extinguishing medium pipe 103 during the sliding process.

[0047] Furthermore, the sealing sleeve 102 is made of silica gel material and has a thickness of 2 to 4 mm.

[0048] Specifically, the silica gel material can be selected as a self-lubricating silica gel material.

[0049] In some embodiments, the extinguishing medium pipe 103 has a horizontal section and a vertical section that communicate with each other, the sealing sleeve 102 is provided outside the vertical section and slidably attached between the housing 101, and the medium outlet 108 is located at the bottom of the vertical section. The horizontal section is attached to the top of the protective cover 106 and extends horizontally outward and is connected to the extinguishing pipe. The extinguishing medium pipe 103 can be supported in the protective cover 106 by a support member, which is not shown and is a known technology and will not be described here.

[0050] In some embodiments, the overcoat 104 is made from an aluminum alloy.

[0051] In some embodiments, the housing 101 is made of a metallic material and the extinguishing medium conduit 103 is made of an aluminum alloy.

[0052] 1, 4 and 5, the battery plug-in box 3 of the embodiment of the present invention includes a housing 303 having a first mounting port 301, the above-mentioned battery explosion-proof valve 1 is attached to the first mounting port 301, the housing 101 is located outside the housing 303, the housing 101 and the housing 303 can be attached to or separated from each other, and when the housing 101 and the housing 303 are separated, a pressure release passage 114 is formed between the housing 101 and the housing 303. Under normal conditions, the housing 101 is hermetically covered by the first mounting port 301 of the battery plug-in box 3.

[0053] To install the battery explosion-proof valve 1, a protective cover 106 is fixed to the outer periphery of the first mounting port 301, the fire-fighting medium pipe 103 enters the protective cover, and the housing 101 is slidingly connected to the medium outlet 108 of the fire-fighting medium pipe 103. An elastic member 105 is provided inside the protective cover, one end of the elastic member 105 is connected to the inside of the protective cover 106, and the other end of the elastic member 105 is connected to the housing 101. A seal ring 107 is provided below the housing 101, and the elastic member 105 presses the housing 101 downward to compress the seal ring.

[0054] The present application uses a battery plug-in box 3 equipped with the above-mentioned battery explosion-proof valve 1, and provides a pressure release passage 114, while allowing a fire extinguishing medium to be injected into the battery plug-in box 3 at the earliest possible time to extinguish the fire. This has a shorter reaction time than existing fire extinguishing solutions, does not cause a delay in the timing of extinguishing the fire, and prevents further damage to the battery and the spread to other batteries in the battery plug-in box, thereby minimizing losses in a timely manner.

[0055] Furthermore, the first opening 112 of the housing 101 is located on the upper end surface of the housing 101, and the second opening 113 is located on the lower end surface of the housing 101, and the chamber 111 of the housing 101 and the first mounting port 301 of the battery plug-in box 3 are communicated through the second opening 113. And, the first opening 112 and the second opening 113 are both located at the upper end of the first mounting port 301, so that the fire extinguishing medium can flow directly into the battery plug-in box 3.

[0056] 5 and 6, the battery plug-in box 3 of the embodiment of the present invention further includes an auxiliary explosion-proof valve 2, a housing 303 has a second mounting port 302 to which the auxiliary explosion-proof valve 2 is attached, the auxiliary explosion-proof valve 2 having a cover plate mounting port 205 and an exhaust port 208, a skeleton 201 fixedly attached to the second mounting port 302, the exhaust port 208 communicating with the second mounting port 302, a cover plate 202 hermetically attached to the cover plate mounting port 202 and having an exhaust passage, and a waterproof, gas-permeable membrane 203 attached to the exhaust passage 204 so that gas generated from the battery cell under normal conditions is discharged to the outside of the housing 303 through the waterproof, gas-permeable membrane 203, and gas generated in the event of thermal runaway of the battery cell breaks through the waterproof, gas-permeable membrane 203 and is discharged to the outside of the housing 303.

[0057] According to the inventor's research, when thermal runaway occurs in a battery cell, gas escapes from the battery cell, and the escaped gas causes the air pressure inside the battery plug-in box to rise rapidly in a short period of time, causing the explosion-proof valve to open and the open explosion-proof valve to release the gas. At this time, a certain pressure difference occurs between the inside and outside of the battery plug-in box, and the released gas prevents the fire-fighting medium from entering the battery plug-in box, slowing down the flow rate of the fire-fighting medium or preventing it from flowing in.

[0058] In this application, by installing the battery explosion-proof valve 1 and the auxiliary explosion-proof valve 2, the battery plug-in box 3 is endowed with both the functions of breathable waterproofing and the injection of extinguishing medium, and the auxiliary explosion-proof valve 2 is provided with a waterproof gas-permeable film 203, which can play the role of balancing the air pressure inside the battery plug-in box 3. When the battery explosion-proof valve 1 explodes, the puncture needle 109 pierces the protective film 104 and the auxiliary explosion-proof valve 2 releases the pressure, so that the extinguishing medium in the extinguishing medium pipe 103 can flow directly into the battery plug-in box 3 to extinguish the fire, and there is no problem that the flow rate of the extinguishing medium slows down or that it is unable to flow into the battery plug-in box 3.

[0059] Furthermore, the skeleton 201 is fixedly attached to the top of the battery plug-in box 3 by a normal method such as a bolt, and an annular groove is provided at the bottom of the skeleton 201, in which an annular seal ring 206 is provided, which realizes the sealing contact between the auxiliary explosion-proof valve 2 and the battery plug-in box 3. The connection between the cover plate 202 and the skeleton 201 is sealed and plugged.

[0060] In some embodiments, the cover plate 202 is injection molded from PP or PA material. The skeleton 201 is formed by injection molding from PP+LGF or PA+LGF material.

[0061] In some embodiments, the breathable waterproof membrane adopts polytetrafluoroethylene (E-PTFE) microporous membrane as the main waterproof breathable material, the pore size of the E-PTFE membrane is 0.1 to 10 μm, but the average diameter of the air molecule is only 0.00036 μm, and the average diameter of the water vapor molecule is 0.00047 μm, and the E-PTFE membrane has low surface energy, and the water molecules are pulled by the surface tension, and the small water droplets quickly form water droplets on the surface of the E-PTFE membrane, so that gas can pass through smoothly but liquid water cannot pass through, so that it has excellent waterproof breathability. When the battery cell goes into thermal runaway and the pressure in the battery plug-in box 3 reaches the explosion-proof pressure of the auxiliary explosion-proof valve 2, the waterproof gas-permeable membrane 203 is destroyed and a large amount of gas is discharged from it.

[0062] In some embodiments, the battery plug-in box 3 of the embodiments of the present invention further includes a thermal reaction expansion sealant 207, which is disposed at a position close to the exhaust port 208 at the low end of the skeleton 201, so that when the battery cell goes into thermal runaway, the thermal reaction expansion sealant 207 expands when high-temperature gas passes through the exhaust port 208 and then blocks the exhaust port 208. As shown in FIG. 6, when the battery cell goes into thermal runaway, the temperature rises, and the thermal reaction expansion sealant 207 is gradually heated when high-temperature gas passes through the battery explosion-proof valve 1, and the heated thermal reaction expansion sealant 207 expands and blocks the exhaust port 208, preventing the fire-fighting medium from leaking out through the auxiliary explosion-proof valve 2.

[0063] Specifically, the reactive expansion sealant 207 is annular and is arranged to surround the exhaust port 208, and a connection structure for fixing the reactive expansion sealant 207 is provided at the low end of the skeleton 201. The fixing method may be a locking method or a method of fixing with a fastener, but this will not be described here.

[0064] The timing at which the thermally reactive expansion sealing material 207 blocks the exhaust port 208 can be designed as necessary, for example, when the height of the fire extinguishing medium inside the battery plug-in box 3 is more than half the height of the battery plug-in box 3, when the thermally reactive expansion sealing material 207 blocks the exhaust port 208, or when the time it takes for the fire extinguishing medium to flow into the battery plug-in box 3 to be one minute or more.

[0065] In some embodiments, the first mounting port 301 and the second mounting port 302 are both located on the top of the housing 303. When the fire extinguishing medium is injected into the battery plug-in box 3, even if the battery explosion-proof valve 1 is in an open state, the fire extinguishing medium will not overflow in a short time.

[0066] In some embodiments, the material of the heat-reactive expansion sealant 207 is a heat-reactive expansion foam material. When heated, the volume of this material gradually expands, filling gaps and providing a sealing and waterproof effect.

[0067] In some embodiments, the explosion pressure of the battery explosion valve 1 is less than the explosion pressure of the auxiliary explosion valve 2 .

[0068] In use, the extinguishing medium pipe 103 of the battery explosion-proof valve 1 is connected to the external fire extinguishing pipe to pass the extinguishing medium. Under normal conditions, the battery cell generates gas normally, and the generated gas is discharged through the waterproof gas-permeable membrane 203 of the auxiliary explosion-proof valve 2. When thermal runaway occurs in the battery cell and the pressure inside the battery plug-in box 3 reaches the explosion-proof pressure of the battery explosion-proof valve 1, the battery explosion-proof valve 1 bursts, and the gas discharging upward from the battery plug-in box 3 impacts the housing 101, which moves upward along the sealing sleeve 102, the puncture needle 109 breaks through the protective membrane 104 of the extinguishing medium pipe 103, and the support plate 110 closes the medium outlet 108 for a while due to the continuous impact of the gas, and the extinguishing medium does not flow downward temporarily, or flows out only slightly. At the same time, because the auxiliary explosion-proof valve 2 is equipped with the waterproof gas-permeable membrane 203, a small amount of gas can be discharged to the outside through the waterproof gas-permeable membrane 203 to achieve a certain pressure relief function, but the pressure is mainly relieved by the battery explosion-proof valve 1. Then, the gas is continuously discharged to the outside, the pressure difference between the inside and outside of the battery plug-in box 3 gradually decreases, the housing 101 moves downward due to the spring force, the puncture needle 109 and the support plate 110 are disengaged from the medium outlet 108, and the extinguishing medium flows downward and into the battery plug-in box 3 to extinguish the fire.

[0069] When the pressure in the battery plug-in box 3 reaches the explosion-proof pressure of the auxiliary explosion-proof valve 2, both the battery explosion-proof valve 1 and the auxiliary explosion-proof valve 2 explode. The impact of the gas discharged upward from the battery plug-in box 3 causes the housing 101 to move, and the puncture needle 109 breaks through the protective film 104 of the fire extinguishing medium pipe 103. At the same time, the auxiliary explosion-proof valve 2 exerts its pressure relief function, and the housing 101 moves rapidly downward due to the biasing force of the spring and the impact force of the fire extinguishing medium, and the puncture needle 109 and the support plate 110 are separated from the medium outlet 108, and the fire extinguishing medium quickly flows into the battery plug-in box 3 to be extinguished. At the same time, the thermal reaction expansion seal material 207 of the auxiliary explosion-proof valve 2 gradually expands at high temperature, and when the height of the fire extinguishing medium in the battery plug-in box 3 exceeds half the height of the battery plug-in box 3, the thermal reaction expansion seal material 207 seals the exhaust port 208 to prevent the fire extinguishing medium from flowing out of the auxiliary explosion-proof valve 2.

[0070] The electrical equipment according to the embodiment of the present invention includes the battery plug-in box 3 described above.

[0071] In describing the present invention, the orientations or positional relationships indicated by the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are based on the orientations or positional relationships indicated in the drawings, and are merely for the purpose of facilitating and simplifying the description of the present invention, and do not indicate or imply that the indicated devices or elements must be configured or operated in a particular orientation, and therefore should not be understood as limitations on the present invention.

[0072] It should be noted that the terms "first" and "second" are used for descriptive purposes only and cannot be understood to indicate or imply a relative importance or number of technical features indicated. Thus, a feature defined as "first" or "second" can explicitly or implicitly include at least one feature. In the description of the present invention, "plurality" means at least two, e.g., two, three, etc., unless otherwise specified and limited.

[0073] In the present invention, unless otherwise clearly specified and limited, the terms "attached", "coupled", "connected", "fixed" and the like should be understood in a broad sense. They may be mechanically connected, electrically connected, capable of communicating with each other, directly connected, or indirectly connected via an intermediate medium, and unless otherwise limited, may be an internal connection between two elements or an interaction relationship between two elements. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific situation.

[0074] In the present invention, unless otherwise clearly specified and limited, a first feature may be "above" or "below" a second feature, and the first and second features may be in direct contact with each other, or the first and second features may be in indirect contact with each other via an intermediate medium. In addition, the first feature is "above", "on", and "above" a second feature, but these terms only indicate that the first feature is directly above or diagonally above the second feature, or that the level of the first feature is higher than that of the second feature. The first feature is "below", "below", and "below" a second feature, but these terms only indicate that the first feature is directly below or diagonally below the second feature, or that the horizontal height of the first feature is smaller than that of the second feature.

[0075] In the present invention, the term "several examples" and the like means that the particular features, structures, materials, or characteristics described in connection with the examples are included in at least one embodiment of the present invention. In this specification, general expressions of the above terms do not necessarily have to be directed to the same embodiment. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in any one or more embodiments. Furthermore, if not inconsistent, a person skilled in the art can mix and match different examples and features of different examples described herein.

[0076] Although the embodiments of the present invention have been shown and described above, the above-mentioned embodiments are illustrative and should not be construed as limitations on the present invention. Those skilled in the art can change, modify, substitute, and alter the above-mentioned embodiments within the scope of the present invention. [Explanation of symbols]

[0077] 1 Battery explosion-proof valve 101 Housing 102 Seal sleeve 103 Fire extinguishing medium pipeline 104 Protective film 105 Elastic member 106 Protective cover 107 Seal Ring 108 Media outlet 109 Puncture needle 110 Support plate 111 Cavity 112 First Opening 113 Second Opening 114 Pressure relief passage 2 Auxiliary explosion-proof valve 201 Skeleton 202 Cover Plate 203 Waterproof and gas-permeable membrane 204 Exhaust passage 205 Cover plate mounting hole 206 Annular seal ring 207 Heat-Reactive Expansion Sealing Material 208 Exhaust port 3 Battery plug-in box 301 First attachment port 302 Second access point 303 Case

Claims

1. a fire extinguishing medium pipe having a medium outlet connected to a protective membrane for blocking the fire extinguishing medium in the fire extinguishing medium pipe; a housing having a cavity, and a first opening and a second opening communicating with the cavity, one end of the extinguishing medium pipe being fitted into the first opening, the cavity being provided with a piercing member movable relative to the extinguishing medium pipe so as to break through the protective film, the cavity being adapted to communicate with an inner cavity of a battery plug-in box through the second opening; A battery explosion-proof valve.

2. The puncture member includes a support plate and a puncture needle. The puncture needle is connected to the support plate, The battery explosion-proof valve according to claim 1 , wherein the support plate is movable relative to the extinguishing medium pipe so that the puncture needle breaks through the protective film.

3. 3. The battery explosion-proof valve according to claim 2, wherein the support plate is connected to the housing, and the housing is slidably connected to the extinguishing medium line.

4. 2. The battery explosion-proof valve according to claim 1, wherein the housing has a first critical position and a second critical position with respect to the extinguishing medium pipe, and in the first critical position, the support plate abuts against the extinguishing medium pipe to block the medium outlet, and in the second critical position, the support plate is spaced apart from the medium outlet.

5. A protective cover and an elastic member are provided. the protective cover is attached to the outside of the housing; One end of the elastic member is connected to the inside of the protective cover, and the other end of the elastic member is connected to the housing, 5. The battery explosion protection valve of claim 4, wherein the resilient member urges the housing toward the second critical position.

6. 2. The battery explosion-proof valve according to claim 1, wherein a seal ring is provided on the bottom of the housing at a position surrounding the second opening.

7. 7. The battery explosion-proof valve according to claim 6, wherein the material of the sealing ring is ethylene propylene rubber foam.

8. 4. The battery explosion-proof valve according to claim 3, wherein a seal sleeve is provided in the extinguishing medium pipe, and the seal sleeve is slidably attached to the first opening.

9. 2. The battery explosion-proof valve according to claim 1, wherein the protective film is made of an aluminum alloy.

10. a housing having a first mounting port; The battery explosion-proof valve according to any one of claims 1 to 9 is attached to the first attachment port, A battery plug-in box in which the housing is located outside the case, the housing and the case are connectable and disconnectable, and a pressure release passage is formed between the housing and the case when the housing and the case are separated.

11. an auxiliary explosion-proof valve, the housing having a second mounting port, the auxiliary explosion-proof valve being attached to the second mounting port; The auxiliary explosion-proof valve is a skeleton having a cover plate mounting port and an exhaust port, the skeleton being fixedly attached to the second mounting port, the exhaust port being in communication with the second mounting port; a cover plate that is hermetically attached to the cover plate attachment port and has an exhaust passage; a waterproof, gas-permeable membrane attached to the exhaust passage so that gas generated from the battery cell under normal conditions is discharged to the outside of the housing through the waterproof, gas-permeable membrane, and gas generated in the event of thermal runaway of the battery cell breaks through the waterproof, gas-permeable membrane and is discharged to the outside of the housing; The battery plug-in box of claim 10 .

12. 12. The battery plug-in box of claim 11, further comprising a thermally reactive expansion seal material disposed at a low end of the skeleton to seal the exhaust port after the thermally reactive expansion seal material thermally expands.

13. The battery plug-in box according to claim 11 , wherein the first mounting port and the second mounting port are both provided on a top portion of the housing.

14. The battery plug-in box according to claim 12, wherein the heat-reactive expansion seal material is a heat-reactive expansion foam material.

15. The battery plug-in box according to claim 11, wherein the explosion-proof pressure of the battery explosion-proof valve is lower than the explosion-proof pressure of the auxiliary explosion-proof valve.

16. An electrical installation comprising the battery plug-in box according to claim 10.

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