Thermal runaway battery ejection device and use method thereof

Abstract

The invention provides a thermal runaway battery ejection device and a using method thereof.The thermal runaway battery ejection device comprises an ejection mechanism, and the ejection mechanism is close to a battery and used for ejecting the battery; the ejection mechanism is provided with a driving mechanism, and the driving mechanism is used for driving the ejection mechanism to work; a protection plate is arranged on the side, close to the ejection mechanism, of the battery. The device is applied to battery bins and a partition plate, the partition plate is provided with a plurality of battery bins, batteries are located in the battery bins, and sensors are arranged in the battery bins. Two partition plates are arranged, a side plate is arranged between the two partition plates, and a top plate is arranged at the tops of the partition plates. The ejection mechanism is connected with the partition plate. A spring is not used as ejection power, the ejection force cannot be reduced due to long-time use, and it is guaranteed that when the battery is in thermal runaway, enough ejection force is provided for ejecting the thermal runaway battery; the battery thermal runaway can be quickly responded, the battery can be timely popped out, the thermal runaway diffusion risk is reduced, fire explosion is prevented, and peripheral equipment is protected.

Description

Technical Field

[0001] The present invention relates to the technical field of battery thermal runaway treatment, and in particular to a thermal runaway battery ejection device and a use method thereof. Background Art

[0002] Wind power and photovoltaic power cannot operate continuously for 24 hours due to the influence of the natural environment. When they are connected to the grid for power generation, they have a great impact on the power grid, which restricts their development.

[0003] To solve this problem, the country advocates the establishment of energy storage power stations for energy storage. Energy storage power stations serve as bridges between power generation equipment and the power grid. Energy storage power stations are composed of many energy storage batteries. As a medium for storing electrical energy, high-energy-density batteries are required.

[0004] At present, energy storage batteries are installed in containers. A single container is equipped with multiple batteries. However, energy storage batteries have the problem of thermal runaway. If thermal runaway occurs, it will cause damage to the batteries in the container and even cause a chain reaction, causing the batteries in a container to explode, and then affect the entire energy storage power station. Once an explosion occurs, the economic losses and social impact will be unbearable.

[0005] At present, the method of ejecting the battery is often used to deal with thermal runaway batteries to prevent the thermal runaway battery from damaging intact batteries, such as the patent with publication number CN115692903B.

[0006] However, at present, a spring ejection method is generally used for battery ejection. In actual use, since the spring is in a compressed state for a long time, the spring is prone to reduced elasticity. In the actual process of ejecting the battery, there is not enough force to eject the battery. Summary of the invention

[0007] The main purpose of the present invention is to provide a thermal runaway battery ejection device and a method of using the same, so as to solve the problem that the prior art cannot eject the thermal runaway battery normally.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is: A thermal runaway battery ejection device comprises an ejection mechanism, the ejection mechanism is close to the battery and is used to eject the battery; The ejection mechanism is provided with a driving mechanism, and the driving mechanism is used to drive the ejection mechanism to work; A protective plate is provided on the side of the battery close to the ejection mechanism.

[0009] In a preferred solution, it is applied to a battery compartment and a partition, the partition is provided with a plurality of battery compartments, the batteries are located in the battery compartments, and the sensors are provided in the battery compartments; Two partitions are provided, a side plate is provided between the two partitions, and a top plate is provided on the top of the partitions; The ejection mechanism is connected to the partition; A cover plate is arranged on one side of the battery compartment away from the partition plate, and a slit is arranged on the surface of the cover plate. The slit is cut in a square shape, and the size of the square is larger than the size of the battery end face.

[0010] In a preferred solution, the ejection mechanism includes a protective cover, a pressure chamber is provided on a side of the protective cover close to the battery, and a gas generating structure is provided in the pressure chamber; the driving mechanism is used to make the gas generating structure generate gas; A push plate is provided on one side of the protective sleeve close to the battery, the push plate is close to the protective plate, the push plate is provided with a sealing plate, and the sealing plate is located in the pressure chamber; A sealing ring is provided outside the sealing plate, which is in close contact with the inner wall of the pressure chamber; The inner wall of the protective sleeve is provided with a heat insulation board.

[0011] In a preferred solution, the driving mechanism includes a fixed box arranged outside the protective sleeve, and a movable seat is slidably connected inside the fixed box; A suction plate is provided on one side of the movable seat close to the protective cover, and an electromagnet is provided in the fixed box, and the electromagnet is used to attract the suction plate; A movable rod is provided on one side of the movable seat close to the protective cover, and a spring is provided on the outer cover of the movable rod, and the spring presses against the movable rod; The movable rod is slidably extended to the interior of the protective cover.

[0012] In a preferred embodiment, the gas-generating structure is an air bag filled with compressed gas; A puncture portion is provided on one side of the airbag close to the battery, and a spike portion is provided at the end of the movable rod, and the spike portion is aligned with the puncture portion; or A connecting seat is provided on one side of the airbag close to the battery, and a limiting plate is slidably connected in the connecting seat. The sliding direction of the limiting plate is the same as the sliding direction of the movable rod, and the end of the movable rod is aligned with the limiting plate; An outlet is provided on one side of the connection seat close to the battery, and a connection hole is provided on one side of the connection seat close to the airbag, the connection hole is communicated with the airbag, a sealing plug is provided in the connection hole, the sealing plug abuts against the limit plate, and a through hole is provided inside the limit plate; A guide rail is arranged inside the pressure chamber, and a guide groove is arranged on the surface of the airbag, and the guide groove is matched with the guide rail.

[0013] In a preferred solution, the driving mechanism includes a fixed box arranged outside the protective sleeve, and a movable seat is slidably connected inside the fixed box; A suction plate is provided on one side of the movable seat close to the protective cover, and an electromagnet is provided in the fixed box, and the electromagnet is used to attract the suction plate; A spring guide column and a spring are provided on one side of the movable seat close to the protective cover, the spring abuts against the movable rod, and the spring guide column extends into the spring; A movable plate is provided on the side of the movable seat, a first power connection piece is provided in the fixed box, and a second power connection piece is provided on the side of the movable plate close to the first power connection piece; The gas generating structure is a gas generating agent, a circular groove is provided on the side of the sealing plate close to the gas generating agent, a gas hood is provided between the sealing plate and the gas generating agent, the edge of the gas hood is connected to the pressure chamber through a connecting belt, and the pressure chambers on both sides of the gas hood are isolated by the gas hood; The first electrical connection sheet is connected to a heating wire via a connecting wire, and the heating wire is located in the gas generating agent; The first terminal block and the second terminal block are externally connected to a power supply device through a connecting wire. When the first terminal block contacts the second terminal block, the power supply device, the first terminal block, the second terminal block, the heating wire and the connected connecting wire form a series circuit.

[0014] In a preferred solution, a connecting mechanism is provided between the ejection mechanism and the battery, and the connecting mechanism is used to connect the battery to a power supply circuit; The connecting mechanism comprises a connecting shell connected to the fixing box, wherein an active cavity and a power receiving seat are arranged in the connecting shell, and the power receiving seat is located in the active cavity; The battery is provided with an electrical connection head, which extends into the active cavity and is electrically connected to the electrical connection seat.

[0015] In a preferred solution, a guide groove is provided in the fixed box, a cutting plate is slidably connected in the guide groove, a slope is provided at the bottom of the cutting plate, and the cutting plate is connected to the movable seat through a connecting rod; A movable groove is arranged in the partition plate, and the movable groove is used for the movement of the cutting plate.

[0016] A method for using a thermal runaway battery ejection device comprises the following steps: S1. The sensor detects the battery in real time, and the control unit receives the signal to determine whether thermal runaway occurs; S2. It is determined that the tested battery has thermal runaway, and the control unit controls the driving mechanism to start; S3, the driving mechanism starts, and the ejection mechanism generates high-pressure gas; S4, high-pressure gas is ejected and acts on the battery, and the battery is ejected from the battery compartment due to the gas pressure; Complete the battery ejection through the above steps.

[0017] In a preferred embodiment, the gas-generating structure of the ejection mechanism includes a compressed air bag, a compressed air tank, and gas-generating medicines; When high-pressure gas is ejected, it carries fire extinguishing and cooling materials.

[0018] The present invention provides a thermal runaway battery ejection device and a method for using the same. By adopting the above scheme, the following beneficial effects are achieved: 1. The ejection force does not decrease due to long-term use because the spring is not used as the ejection force, ensuring that there is sufficient ejection force to eject the thermal runaway battery when the battery thermally runs away.

[0019] 2. It can respond quickly to battery thermal runaway, eject the battery in time, reduce the risk of thermal runaway spread, prevent fire and explosion, and protect surrounding equipment.

[0020] 3. A variety of gas production structures can be optimized as needed to quickly generate high-pressure gas, provide reliable power for ejection, adapt to different usage requirements, and be more convenient to use.

[0021] 4. The overall structure is reasonable, the components are closely matched, and the structure is simple, which ensures the stable operation of the device and extends its service life.

[0022] 5. Isolating the power connection structure when popping up can avoid adverse effects on the overall connection line and ensure the stability of the overall line. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a structural schematic diagram of a thermal runaway battery ejection device of the present invention when it is applied to an energy container; Figure 2 The present invention is a thermal runaway battery ejection device located in a single battery compartment; Figure 3 It is a cross-sectional view of a thermal runaway battery ejection device of the present invention located in a single battery compartment; Figure 4 It is a structural schematic diagram of a thermal runaway battery ejection device of the present invention; Figure 5 It is a side view of a thermal runaway battery ejection device of the present invention; Figure 6 It is a schematic diagram of the internal structure of a thermal runaway battery ejection device of the present invention; Figure 7 is a cross-sectional view of the connecting mechanism of the present invention; Figure 8 is a schematic structural diagram of an embodiment of the ejection mechanism of the present invention; Fig. 9 is a schematic structural diagram of an embodiment of the ejection mechanism of the present invention; Fig.10 It is a schematic structural diagram of an embodiment of the ejection mechanism of the present invention.

[0024] In the figure: Partition 1, battery compartment 101, cover plate 102, slit 103, side plate 104, top plate 105, battery 2, connection head 201, protective plate 202, ejection mechanism 3, protective sleeve 301, push plate 302, sealing plate 303, sealing ring 304, airbag 305, puncture part 306, heat insulation plate 307, pressure chamber 308, connecting seat 311, outlet 312, limit plate 313, through hole 314, connecting hole 315, sealing plug 316, guide rail 317, circular groove 321, gas generating agent 322, Air hood 323, connecting belt 324, driving mechanism 4, fixed box 401, movable seat 402, suction plate 403, electromagnet 404, movable rod 405, spring 406, spike portion 407, spring guide column 408, movable plate 411, first power connection plate 412, second power connection plate 413, connecting wire 414, heating wire 415, connecting mechanism 5, connecting shell 501, movable cavity 502, cutting plate 503, inclined surface 504, power connection seat 505, connecting rod 506, guide groove 507, movable groove 508. DETAILED DESCRIPTION

[0025] Embodiment 1: like Figure 1 , 2 , 3 and 4, a thermal runaway battery ejection device includes an ejection mechanism 3, which is close to a battery 2 and is used to eject the battery 2; the battery 2 refers to the battery in the energy storage power station.

[0026] The ejection mechanism 3 is provided with a driving mechanism 4, and the driving mechanism 4 is used to drive the ejection mechanism 3 to work; A protective plate 202 is provided on one side of the battery 2 close to the ejection mechanism 3 to prevent the battery 2 from being directly impacted and to prevent the outer shell of the battery 2 from being broken by the impact force of the ejection mechanism 3, so as to protect the battery from being damaged during the ejection process.

[0027] When the battery 2 experiences thermal runaway, the driving mechanism 4 drives the ejection mechanism 3 to operate, and the ejection force generated by the ejection mechanism 3 acts on the battery 2 to eject the battery 2 .

[0028] In a preferred solution, the device is applied to a system consisting of a battery compartment 101 and a partition 1. The partition 1 is provided with a plurality of battery compartments 101, and the battery 2 is located in the battery compartment 101. A sensor is provided in the battery compartment 101 for real-time monitoring of the battery status. The sensor can be an existing sensor for monitoring the thermal runaway of the battery 2, such as a temperature sensor. The temperature sensor detects a temperature signal and transmits it to the control unit in an existing manner. The control unit can be a control device commonly used in existing energy storage power stations, such as a PLC. The thermal runaway temperature is preset in the control unit. The control unit determines whether a thermal runaway situation occurs based on the temperature transmitted by the temperature sensor and the preset temperature.

[0029] Two partitions 1 are provided, a side plate 104 is provided between the two partitions 1, and a top plate 105 is provided on the top of the partition 1, which together form a stable battery accommodation structure, and batteries 2 can be arranged on both sides. The ejection mechanism 3 is connected to the partition 1 to ensure the stability of its installation. A cover plate 102 is provided on the side of the battery compartment 101 away from the partition 1, and a slit 103 is provided on the surface of the cover plate 102. The slit 103 is cut in a square shape, and the size of the square is larger than the size of the end face of the battery 2, so that the battery can pass smoothly during ejection.

[0030] The cut 103 can refer to the V-cut line, or be cut directly through, leaving a small amount of uncut part in the cut 103, and the cover plate 102 can be directly broken along the cut 103 after being subjected to force; In a further embodiment, Figure 2 , 3 As shown in , 4, 5 and 6, the ejection mechanism 3 includes a protective cover 301, a pressure chamber 308 is provided on the side of the protective cover 301 close to the battery 2, and a gas generating structure is provided in the pressure chamber 308; the driving mechanism 4 is used to make the gas generating structure generate gas; A push plate 302 is provided on one side of the protective sleeve 301 close to the battery 2. The push plate 302 is close to the protective plate 202. The push plate 302 is provided with a sealing plate 303. The sealing plate 303 is located in the pressure chamber 308. A sealing ring 304 is provided outside the sealing plate 303, which is in close contact with the inner wall of the pressure chamber 308; The inner wall of the protective sleeve 301 is provided with a heat insulation plate 307 , which can not only prevent the external heat from affecting the structure inside the ejection mechanism 3 , but also prevent the heat generated when the ejection mechanism 3 produces gas from affecting other batteries 2 .

[0031] When in use, the driving mechanism 4 controls the gas production structure to produce gas, and the produced high-pressure gas quickly acts on the pressure chamber 308 and then pushes out the sealing plate 303. The thrust of the sealing plate 303 when being pushed out by the high-pressure gas acts on the protective plate 202 through the push plate 302, so that the battery 2 is affected by the thrust and is quickly pushed out of the battery compartment 101. The operation is simple. Compared with the spring method, the present application has a faster response and a greater thrust, and the thrust will not decrease with long-term use, thereby ensuring that the battery 2 can be stably pushed out.

[0032] Embodiment 2: like Figure 4 , 5 As shown in , 6 and 8, the driving mechanism 4 includes a fixed box 401 arranged outside the protective sleeve 301, and a movable seat 402 is slidably connected inside the fixed box 401; A suction plate 403 is provided on one side of the movable seat 402 close to the protective cover 301, and an electromagnet 404 is provided in the fixed box 401, and the electromagnet 404 is used to attract the suction plate 403; A movable rod 405 is provided on one side of the movable seat 402 close to the protective cover 301 , and a spring 406 is provided on the outer sleeve of the movable rod 405 , and the spring 406 abuts against the movable rod 405 ; The movable rod 405 slidably extends into the interior of the protective sleeve 301; The gas generating structure is an air bag 305, and the air bag 305 is filled with compressed gas; A puncture portion 306 is provided on one side of the airbag 305 close to the battery 2, and a spike portion 407 is provided at the end of the movable rod 405, and the spike portion 407 is aligned with the puncture portion 306; In this embodiment, the airbag 305 is made of high-strength, high-pressure-resistant and airtight polyurethane rubber material or metal, and its wall thickness is preferably designed to be 1-2 mm, with good elasticity and pressure resistance, and can withstand the high pressure of the internal compressed gas without breaking. The airbag 305 is cylindrical and filled with compressed gas, and the compressed gas is preferably nitrogen. Nitrogen is an inert gas with stable chemical properties and is not easy to react with other substances. It can provide stable thrust during the ejection process and is relatively safe in a high temperature environment.

[0033] The puncture portion 306 is located at one end of the airbag close to the battery 2 and is made of a relatively thin rubber material to ensure that it can withstand the internal air pressure. The thickness is preferably 0.5-1 mm so that the spike portion 407 at the end of the movable rod 405 can be easily punctured to achieve rapid release of gas.

[0034] Working process: When the sensor detects that the battery 2 has thermal runaway, the control unit immediately sends a power-on signal to the electromagnet 404. After the electromagnet 404 is powered on, a strong magnetic field is generated to attract the movable seat 402 to the suction plate 403 on one side of the protective cover 301.

[0035] Under the attraction of the electromagnet 404, the suction plate 403 drives the movable seat 402 to move rapidly toward the protective cover 301. The movement of the movable seat 402 causes the movable rod 405 with the spring 406 on the outer cover to slide forward, and the spring 406 is compressed to store elastic potential energy.

[0036] The spike portion 407 at the end of the movable rod 405 accurately punctures the puncture portion 306 of the airbag 305 at a faster speed. At this time, the high-pressure gas in the airbag 305 is instantly released from the puncture, pouring into the pressure chamber 308, causing the air pressure in the pressure chamber 308 to rise sharply.

[0037] The high-pressure gas acts on the push plate 302, and the push plate 302 transmits force to the battery 2 through the protective plate 202, overcoming the friction in the battery compartment 101 and the resistance of the connecting mechanism 5, and quickly ejecting the battery 2 from the battery compartment, thereby isolating the thermal runaway battery from other normal batteries, effectively preventing the further spread of thermal runaway.

[0038] Embodiment 3: like Figure 4 , 5 As shown in , 6 and 9, the driving mechanism 4 includes a fixed box 401 disposed outside the protective sleeve 301, and a movable seat 402 is slidably connected inside the fixed box 401; A suction plate 403 is provided on one side of the movable seat 402 close to the protective cover 301, and an electromagnet 404 is provided in the fixed box 401, and the electromagnet 404 is used to attract the suction plate 403; A movable rod 405 is provided on one side of the movable seat 402 close to the protective cover 301 , and a spring 406 is provided on the outer sleeve of the movable rod 405 , and the spring 406 abuts against the movable rod 405 ; The movable rod 405 slidably extends into the interior of the protective sleeve 301; The gas generating structure is an air bag 305, and the air bag 305 is filled with compressed gas; A connecting seat 311 is provided on one side of the airbag 305 close to the battery 2. A limiting plate 313 is slidably connected inside the connecting seat 311. The sliding direction of the limiting plate 313 is the same as the sliding direction of the movable rod 405. The end of the movable rod 405 is aligned with the limiting plate 313. An outlet 312 is provided on one side of the connection base 311 close to the battery 2, and a connection hole 315 is provided on one side of the connection base 311 close to the airbag 305. The connection hole 315 is communicated with the airbag 305, and a sealing plug 316 is provided in the connection hole 315. The sealing plug 316 abuts against the limiting plate 313, and a through hole 314 is provided inside the limiting plate 313. A guide rail 317 is provided inside the pressure chamber 308 , and a guide groove is provided on the surface of the airbag 305 , and the guide groove is matched with the guide rail 317 .

[0039] In this embodiment, the airbag 305 is also made of high-strength rubber or metal material, preferably a blend of nitrile rubber and polyvinyl chloride, which has good oil resistance, wear resistance and air tightness. It is in the shape of a cuboid, and the wall thickness is preferably 0.8-1.5 mm.

[0040] The connection seat 311 is preferably made of aluminum alloy, has light weight and good mechanical strength, can be firmly fixed on the airbag 305, and provides stable support for the movement of the limit plate 313. The outlet 312 on the connection seat 311 is preferably a tapered hole.

[0041] The limiting plate 313 is made of stainless steel and has a smooth surface to reduce friction with the inner wall of the connecting seat 311. The diameter of the through hole 314 inside it is not less than the diameter of the connecting hole 315 to ensure that the sealing plug 316 can pass normally.

[0042] The sealing plug 316 is made of rubber and has good elasticity and sealing performance. When there is no external force, the high-pressure gas in the airbag 305 can make the sealing plug 316 tightly press against the limiting plate 313 to prevent the gas in the airbag 305 from leaking. The limiting plate 313 will not slide at will due to the pressure of the sealing plug 316.

[0043] Working process: Once the battery thermal runaway is detected by the sensor and transmitted to the control unit, the control unit controls the electromagnet 404 to be energized to generate a magnetic field to attract the suction plate 403 on the movable seat 402 .

[0044] The movable seat 402 drives the movable rod 405 to slide toward the inside of the protective sleeve 301, and the spring 406 is compressed. The end of the movable rod 405 pushes the limit plate 313, so that it overcomes the resistance of the sealing plug 316 and starts to move.

[0045] As the limiting plate 313 moves, the outlet 312, the through hole 314 and the connecting hole 315 are connected. At this time, the sealing plug 316 is no longer affected by the limiting plate 313. The sealing plug 316 is affected by the high pressure in the airbag 305 and leaves the connecting hole 315, and flies out through the through hole 314 and the outlet 312. The compressed gas in the airbag 305 passes through the connecting hole 315 and the through hole 314 on the limiting plate 313, and is ejected from the outlet 312 of the connecting seat 311 and enters the pressure chamber 308.

[0046] The air pressure in the pressure chamber 308 increases rapidly, pushing the push plate 302 to move toward the battery 2, ejecting the battery 2 from the battery compartment 101, thereby separating the thermal runaway battery and avoiding affecting surrounding batteries.

[0047] At the same time, the guide rail 317 inside the pressure chamber 308 is closely matched with the guide groove on the surface of the airbag 305 to ensure that the airbag 305 will not move at will, thereby ensuring that the end of the movable rod 405 can push the limit plate 313 and produce gas normally.

[0048] Embodiment 4: like Figure 4 , 5 As shown in , 6 and 10, the driving mechanism 4 includes a fixed box 401 disposed outside the protective sleeve 301, and a movable seat 402 is slidably connected inside the fixed box 401; A suction plate 403 is provided on one side of the movable seat 402 close to the protective cover 301, and an electromagnet 404 is provided in the fixed box 401, and the electromagnet 404 is used to attract the suction plate 403; A spring guide post 408 and a spring 406 are provided on one side of the movable seat 402 close to the protective cover 301. The spring 406 abuts against the movable rod 405, and the spring guide post 408 extends into the spring 406. A movable plate 411 is provided on the side of the movable seat 402, a first power connection sheet 412 is provided in the fixed box 401, and a second power connection sheet 413 is provided on the side of the movable plate 411 close to the first power connection sheet 412; The gas generating structure is a gas generating agent 322. A circular groove 321 is provided on one side of the sealing plate 303 close to the gas generating agent 322. A gas cover 323 is provided between the sealing plate 303 and the gas generating agent 322. The edge of the gas cover 323 is connected to the pressure chamber 308 through a connecting belt 324. The pressure chambers 308 on both sides of the gas cover 323 are isolated by the gas cover 323. The first electrical connection sheet 412 is connected to a heating wire 415 via a connecting wire 414 , and the heating wire 415 is located in the gas generating agent 322 ; The first terminal 412 and the second terminal 413 are connected to a power supply device via a connecting wire 414. When the first terminal 412 and the second terminal 413 are in contact, the power supply device, the first terminal 412, the second terminal 413, the heating wire 415 and the connecting wire 414 form a series circuit.

[0049] In this embodiment, the gas generating agent 322 is a composite formula with ammonium nitrate as the main component, 5% calcium carbonate as a stabilizer and 2% copper oxide as a catalyst. Ammonium nitrate has the advantages of large gas production and low cost, calcium carbonate can improve the stability of the gas generating agent and prevent it from decomposing during storage, and copper oxide as a catalyst can reduce the decomposition temperature of the gas generating agent and speed up the gas production, ensuring that sufficient gas can be quickly generated to propel the battery ejection in an emergency.

[0050] The gas hood 323 is made of high temperature resistant polytetrafluoroethylene material, which has good chemical stability and high temperature resistance. It can maintain structural integrity in the high temperature environment where the gas generating agent 322 generates gas, effectively isolate the pressure chambers 308 on both sides of the gas hood, prevent gas leakage and mixing, and ensure that the gas can act on the gas hood 323, and then act on the push plate 302 through the gas hood 323, thereby improving the ejection efficiency. The edge of the gas hood 323 is connected to the pressure chamber 308 by a high temperature resistant silicone connecting belt 324. The connecting belt 324 has a certain degree of flexibility and elasticity, and can play a role in buffering and sealing when the gas hood 323 is subjected to gas pressure.

[0051] The surface of the connecting belt 324 is provided with fine holes. After the battery 2 is ejected, the generated gas gradually leaks out through the fine holes to avoid accumulation in the pressure chamber 308; The heating wire 415 is made of nickel-chromium alloy, which has high resistivity and good high temperature resistance. It can quickly generate heat after power is turned on, quickly heat the gas generating agent 322, and decompose it to generate gas. The diameter of the heating wire 415 is preferably 0.5 mm, and it is evenly distributed in a spiral shape inside the gas generating agent 322 to ensure that the gas generating agent can be evenly heated and quickly and stably generate gas.

[0052] Working process: When the sensor detects that the battery 2 is in thermal runaway condition, the control unit controls the electromagnet 404 to be energized to attract the suction plate 403 on the movable seat 402 , so that the movable seat 402 moves toward the protective cover 301 .

[0053] The movement of the movable seat 402 drives the movable plate 411 on its side to move together. When the movable plate 411 approaches the first power contact plate 412 in the fixed box 401, the second power contact plate 413 on the movable plate 411 contacts the first power contact plate 412. At this time, the power supply device, the first power contact plate 412, the second power contact plate 413, the heating wire 415 and the connected connecting line 414 form a series circuit, and the current passes through the heating wire 415.

[0054] The heating wire 415 is heated rapidly under the action of the current and transfers the heat to the gas generating agent 322. The gas generating agent 322 begins to decompose under the action of the heat to generate a large amount of gas, which is accumulated in the space between the gas hood 323 and the pressure chamber 308 under the restriction of the gas hood 323, causing the gas pressure in this area to rise rapidly.

[0055] As the gas pressure continues to increase, the gas swells the gas hood 323, and the swollen gas hood 323 acts on the sealing plate 303, pushing the sealing plate 303 and the push plate 302 to move toward the battery 2, and finally ejecting the battery 2 from the battery compartment 101, completing the ejection operation of the thermal runaway battery, avoiding the spread of the thermal runaway phenomenon, and ensuring the safety of the entire battery system. Embodiment 5: like Figure 4 , 5 As shown in , 6 and 7, a connecting mechanism 5 is provided between the ejection mechanism 3 and the battery 2, and the connecting mechanism 5 is used to connect the battery 2 to the power supply circuit; The connecting mechanism 5 includes a connecting shell 501 connected to the fixing box 401, and an active cavity 502 and a power socket 505 are provided in the connecting shell 501, and the power socket 505 is located in the active cavity 502; the connecting shell 501 is preferably made of high-strength engineering plastics, such as polycarbonate PC material, which has good insulation performance and mechanical strength, can effectively protect the internal electrical connection components from the influence of the external environment, and at the same time reduce the weight of the entire device.

[0056] The battery 2 is provided with a connection head 201 . The connection head 201 extends into the active cavity 502 . The connection head 201 is electrically connected to the connection socket 505 .

[0057] The size of the active cavity 502 is precisely adapted to the size of the connection head 201 of the battery 2 and the connection socket 505, ensuring that the connection head 201 can be smoothly inserted into the active cavity 502 and tightly connected with the connection socket 505. The inner wall of the active cavity 502 has been specially treated to have a certain degree of smoothness, which reduces the friction resistance of the connection head 201 during the insertion and removal process, and also helps to prevent dust and impurities from entering and affecting the stability of the electrical connection.

[0058] The connection head 201 and the connection socket 505 can adopt the contact connection structure commonly used in existing batteries when connecting lines, such as a connection plate, which is preferably made of beryllium bronze alloy with good elasticity and conductivity.

[0059] In the preferred embodiment, a guide groove 507 is provided in the fixed box 401, and a cutting plate 503 is slidably connected in the guide groove 507. A slope 504 is provided at the bottom of the cutting plate 503. The cutting plate 503 is connected to the movable seat 402 through a connecting rod 506. The surface of the cutting plate 503 is finely ground to reduce the friction between the cutting plate 503 and the electrical connector 201, while also improving the efficiency and accuracy of cutting. The guide groove 507 is used to guide the sliding direction of the cutting plate 503.

[0060] A movable groove 508 is provided in the partition plate 1, and the movable groove 508 is used for the movement of the cutting plate 503.

[0061] When the battery 2 is in normal working condition, the power connector 201 of the battery 2 is stably inserted into the active cavity 502 of the connecting mechanism 5 and is tightly connected to the power connector 505, ensuring that the battery 2 can be normally powered to maintain the operation of the device. At this time, the cutting plate 503 is located at the initial position of the guide groove 507, away from the power connector 201 of the battery 2, and will not have any impact on the electrical connection.

[0062] When the sensor detects that the battery 2 has thermal runaway, the control unit quickly starts the driving mechanism 4 of the ejection mechanism 3. The electromagnet 404 is energized to attract the movable seat 402 to move toward the protective sleeve 301. The movement of the movable seat 402 drives the cutting plate 503 to slide synchronously in the guide groove 507 and the movable groove 508 through the connecting rod 506. Due to the design of the inclined surface 504 at the bottom of the cutting plate 503, during the forward movement of the cutting plate 503, the inclined surface 504 gradually contacts the power connector 201 of the battery 2, and as the cutting plate 503 continues to move forward, the power connector 201 is gradually squeezed to one side by the squeezing effect of the inclined surface 504, so that the power connector 201 is gradually separated from the power connector 505.

[0063] As the movable seat 402 moves further, the cutting plate 503 completely separates the connection head 201 from the connection seat 505, ensuring that during the ejection of the battery 2, no other safety hazards will be caused by problems such as pulling or short circuiting of the power line. At the same time, the high-pressure gas generated by the ejection mechanism 3 pushes the push plate 302, and the battery 2 is ejected from the battery compartment 101 through the protective plate 202, thereby safely isolating the thermal runaway battery from the entire system; and when the battery 2 is ejected, the connection seat 505 is isolated from the battery compartment 101 through the cutting plate 503, so as to avoid the gas or liquid generated by the gas-generating structure from causing adverse effects on the connection seat 505 and the lines connected thereto, thereby ensuring overall stability.

[0064] Meanwhile, wire connection may also be adopted, and the wire may be cut by the cutting plate 503 to complete the power-off operation.

[0065] Embodiment 6: A method for using a thermal runaway battery ejection device comprises the following steps: S1. The sensor detects the battery in real time, and the control unit receives the signal to determine whether thermal runaway occurs; S2. It is determined that the tested battery has thermal runaway, and the control unit controls the driving mechanism to start; S3. After the driving mechanism is started, according to the different gas generating structures, the airbag type gas generating structure punctures the airbag through the movable rod or pushes the limit plate to release the gas, and the gas generating powder type gas generating structure heats the gas generating powder through the heating wire to generate gas, forming high-pressure gas in the pressure chamber; S4. High-pressure gas is ejected from the pressure chamber to act on the battery. Under the influence of gas pressure, the battery overcomes the friction in the battery compartment and the resistance of the connecting mechanism and is ejected from the battery compartment. At the same time, the cutting plate of the connecting mechanism cuts off the connection between the battery and the power line, completing the battery ejection process, effectively preventing the thermal runaway battery from affecting other intact batteries and avoiding greater harm. Complete the battery ejection through the above steps.

[0066] During the ejection process, the high-pressure gas can carry fire-extinguishing and cooling materials, such as water-based fire extinguishing agents, inert gases, etc., to perform preliminary fire extinguishing and cooling treatment on the thermal runaway battery, further reducing the risk of fire and the degree of thermal runaway damage. For specific methods, please refer to water-based fire extinguishers.

[0067] In the above embodiments, the compressed gas may also be argon, helium, carbon dioxide, heptafluoropropane, nitrogen-carbon dioxide mixed gas, argon-hexafluoropropane mixed gas, etc. The present application may select the most suitable gas-producing gas according to the specific application scenarios and requirements to achieve a more efficient and safer battery thermal runaway protection function.

[0068] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A thermal runaway battery ejection device, characterized by: It comprises an ejection mechanism (3), which is close to the battery (2) and is used to eject the battery (2); The ejection mechanism (3) is provided with a driving mechanism (4), and the driving mechanism (4) is used to drive the ejection mechanism (3) to work; A protective plate (202) is provided on one side of the battery (2) close to the ejection mechanism (3).

2. According to claim 1, a thermal runaway battery ejection device is characterized in that: Applied in a battery compartment (101) and a partition (1), the partition (1) is provided with a plurality of battery compartments (101), the battery (2) is located in the battery compartment (101), and a sensor is provided in the battery compartment (101); Two partitions (1) are provided, a side plate (104) is provided between the two partitions (1), and a top plate (105) is provided on the top of the partitions (1); The ejection mechanism (3) is connected to the partition plate (1); A cover plate (102) is provided on a side of the battery compartment (101) away from the partition plate (1), and a slit (103) is provided on the surface of the cover plate (102). The slit (103) is cut in a square shape, and the size of the square is larger than the size of the end face of the battery (2).

3. According to claim 1, a thermal runaway battery ejection device is characterized in that: The ejection mechanism (3) comprises a protective sleeve (301), a pressure chamber (308) is provided on a side of the protective sleeve (301) close to the battery (2), and a gas generating structure is provided in the pressure chamber (308); the driving mechanism (4) is used to cause the gas generating structure to generate gas; A push plate (302) is provided on one side of the protective sleeve (301) close to the battery (2), the push plate (302) is close to the protective plate (202), the push plate (302) is provided with a sealing plate (303), and the sealing plate (303) is located in the pressure chamber (308); A sealing ring (304) is provided outside the sealing plate (303) and is closely attached to the inner wall of the pressure chamber (308); The inner wall of the protective sleeve (301) is provided with a heat insulation board (307).

4. According to claim 3, a thermal runaway battery ejection device is characterized in that: The driving mechanism (4) comprises a fixed box (401) arranged outside the protective sleeve (301), and a movable seat (402) is slidably connected inside the fixed box (401); A suction plate (403) is provided on one side of the movable seat (402) close to the protective cover (301), and an electromagnet (404) is provided in the fixed box (401), and the electromagnet (404) is used to attract the suction plate (403); A movable rod (405) is provided on one side of the movable seat (402) close to the protective sleeve (301), and a spring (406) is provided on the outer sleeve of the movable rod (405), and the spring (406) abuts against the movable rod (405); The movable rod (405) slidably extends into the interior of the protective sleeve (301).

5. A thermal runaway battery ejection device according to claim 4, characterized in that: The gas generating structure is an air bag (305), and the air bag (305) is filled with compressed gas; A puncture portion (306) is provided on one side of the air bag (305) close to the battery (2), and a spike portion (407) is provided on the end of the movable rod (405), and the spike portion (407) is aligned with the puncture portion (306); or A connecting seat (311) is provided on one side of the airbag (305) close to the battery (2), and a limiting plate (313) is slidably connected inside the connecting seat (311). The sliding direction of the limiting plate (313) is the same as the sliding direction of the movable rod (405), and the end of the movable rod (405) is aligned with the limiting plate (313); An outlet (312) is provided on a side of the connection seat (311) close to the battery (2), a connection hole (315) is provided on a side of the connection seat (311) close to the airbag (305), the connection hole (315) is in communication with the airbag (305), a sealing plug (316) is provided in the connection hole (315), the sealing plug (316) abuts against the limiting plate (313), and a through hole (314) is provided inside the limiting plate (313); A guide rail (317) is provided inside the pressure chamber (308), and a guide groove is provided on the surface of the airbag (305), wherein the guide groove is adapted to the guide rail (317).

6. According to claim 3, a thermal runaway battery ejection device is characterized in that: The driving mechanism (4) comprises a fixed box (401) arranged outside the protective sleeve (301), and a movable seat (402) is slidably connected inside the fixed box (401); A suction plate (403) is provided on one side of the movable seat (402) close to the protective cover (301), and an electromagnet (404) is provided in the fixed box (401), and the electromagnet (404) is used to attract the suction plate (403); A spring guide post (408) and a spring (406) are provided on one side of the movable seat (402) close to the protective sleeve (301), the spring (406) abuts against the movable rod (405), and the spring guide post (408) extends into the spring (406); A movable plate (411) is provided on the side of the movable seat (402), a first power connection plate (412) is provided in the fixed box (401), and a second power connection plate (413) is provided on a side of the movable plate (411) close to the first power connection plate (412); The gas generating structure is a gas generating agent (322), a circular groove (321) is provided on one side of the sealing plate (303) close to the gas generating agent (322), a gas cover (323) is provided between the sealing plate (303) and the gas generating agent (322), an edge of the gas cover (323) is connected to the pressure chamber (308) via a connecting belt (324), and the pressure chambers (308) on both sides of the gas cover (323) are isolated by the gas cover (323); The first electrical connection sheet (412) is connected to a heating wire (415) via a connecting wire (414), and the heating wire (415) is located in the gas generating agent (322); The first power connection piece (412) and the second power connection piece (413) are externally connected to a power supply device via a connecting line (414); when the first power connection piece (412) and the second power connection piece (413) are in contact, the power supply device, the first power connection piece (412), the second power connection piece (413), the heating wire (415) and the connected connecting line (414) form a series circuit.

7. A thermal runaway battery ejection device according to any one of claims 4, 5 and 6, characterized in that: A connecting mechanism (5) is provided between the ejection mechanism (3) and the battery (2), and the connecting mechanism (5) is used to connect the battery (2) to a power supply circuit; The connection mechanism (5) comprises a connection shell (501) connected to the fixing box (401), wherein an active cavity (502) and an electric connection socket (505) are provided in the connection shell (501), and the electric connection socket (505) is located in the active cavity (502); The battery (2) is provided with an electrical connection head (201), the electrical connection head (201) extends into the active cavity (502), and the electrical connection head (201) is electrically connected to the electrical connection seat (505).

8. A thermal runaway battery ejection device according to claim 7, characterized in that: A guide groove (507) is provided in the fixed box (401), a cutting plate (503) is slidably connected in the guide groove (507), an inclined surface (504) is provided at the bottom of the cutting plate (503), and the cutting plate (503) is connected to the movable seat (402) via a connecting rod (506); A movable groove (508) is provided in the partition plate (1), and the movable groove (508) is used for the movement of the cutting plate (503).

9. A method for using the thermal runaway battery ejection device according to any one of claims 1 to 8, characterized in that The steps include: S1. The sensor detects the battery in real time, and the control unit receives the signal to determine whether thermal runaway occurs; S2. It is determined that the tested battery has thermal runaway, and the control unit controls the driving mechanism to start; S3, the driving mechanism starts, and the ejection mechanism generates high-pressure gas; S4, high-pressure gas is ejected and acts on the battery, and the battery is ejected from the battery compartment due to the gas pressure; Complete the battery ejection through the above steps.

10. The method for using the thermal runaway battery ejection device according to claim 9, characterized in that: The gas-generating structure of the ejection mechanism includes a compressed air bag, a compressed air tank and gas-generating medicine; When high-pressure gas is ejected, it carries fire extinguishing and cooling materials.

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