Emergency prevention and control device for battery thermal runaway

Abstract

The invention is suitable for the field of battery thermal runaway prevention and control, and provides a battery thermal runaway emergency prevention and control device which comprises a battery box body, a battery module, a heat insulation plate, a gas-liquid mixing pump, a water tank, a siphon effect device, a temperature and gas sensing device, a transmission device and a gravity sensing device. When thermal runaway of the single battery occurs, the temperature and gas sensing device triggers the gas-liquid mixing pump, and cooling liquid is sprayed from top to bottom through a siphonic effect to cool the thermal runaway battery; and meanwhile, the gas-liquid mixture drives the transmission device to cut the battery connecting piece, so that the fault battery falls off to the lower box cover. After the gravity sensing device detects the weight change, the lower box cover is automatically separated from the battery box body, so that heat diffusion is prevented. According to the invention, through combination of structural design, siphon liquid cooling and automatic cutting separation technologies, rapid cooling of the thermal runaway battery and fault monomer isolation are realized, and thermal runaway spreading is effectively prevented.

Description

Technical Field

[0001] The present invention belongs to the field of battery thermal runaway prevention and control, and in particular relates to a battery thermal runaway emergency prevention and control device. Background Art

[0002] The development of battery thermal runaway emergency prevention and control devices is closely linked to the widespread adoption of high-energy-density energy storage technologies such as lithium-ion batteries. In recent years, with the rapid development of new energy vehicles, portable electronic devices, and energy storage power stations, lithium-ion batteries have become a mainstream energy solution due to their high energy density and long cycle life. However, they still face significant challenges in thermal management, particularly thermal runaway, which poses a serious threat to the safe operation of the system and the safety of users' lives and property.

[0003] Thermal runaway is typically caused by factors such as internal short circuits, overcharging, over-discharging, mechanical damage, or high external temperatures. When the internal temperature of the battery reaches a critical value, it triggers a series of violent exothermic side reactions, causing a rapid temperature rise. This can be accompanied by battery bulging, electrolyte leakage, fire, or even explosion, posing a significant safety hazard.

[0004] Currently, traditional battery safety measures primarily rely on battery management systems (BMS) to monitor voltage, current, and temperature. However, these methods often struggle to accurately identify and quickly respond to early signs of thermal runaway. Furthermore, lithium-ion batteries release oxygen and flammable gases during combustion, exacerbating fire growth. Conventional firefighting methods are limited in their effectiveness against these fires.

[0005] To improve the safety and reliability of battery systems and promote the further development of high-energy-density battery technology, continuous optimization and innovation of battery thermal runaway emergency prevention and control devices are urgently needed to achieve the goals of early warning, rapid intervention, and effective suppression of heat spread. Therefore, in response to the above status quo, there is an urgent need to develop a battery thermal runaway emergency prevention and control device to overcome the shortcomings of current practical applications. Summary of the Invention

[0006] The purpose of the present invention is to provide a battery thermal runaway emergency prevention and control device, aiming to solve the problems mentioned in the above background technology.

[0007] The present invention is implemented as follows: a battery thermal runaway emergency prevention and control device includes a battery box, a battery module is suspended inside the battery box, and an upper box cover and a lower box cover are respectively provided on the top and bottom of the battery box; a heat insulation plate is provided between adjacent battery cells in the battery module, and the poles of adjacent battery cells are connected by battery connecting pieces; a gas-liquid mixing pump and a water tank are provided on the upper box cover, and a siphon effect device is provided in the water tank; a gravity sensing device is provided at the bottom of the lower box cover; and the device also includes a transmission device and a temperature and gas sensing device installed on the upper box cover, the temperature and gas sensing device is used to detect the gas and temperature signals of the battery cell pressure relief valve and trigger the operation of the gas-liquid mixing pump and the transmission device;

[0008] When a battery cell in the battery module experiences thermal runaway, the temperature and gas sensing device receives the gas and temperature signals from the corresponding battery cell pressure relief valve, and the temperature and gas sensing device issues an operating instruction to the gas-liquid mixing pump. At this time, the suction force generated by the gas-liquid mixing pump will drive the siphon effect device in the water tank to work. The siphon effect device transports the coolant in the water tank from top to bottom to the inner cavity of the upper box cover, and flows into the battery box through the blade holes evenly distributed on the upper box cover, thereby achieving rapid cooling of the battery cell experiencing thermal runaway; the gas-liquid mixture generated by the operation of the gas-liquid mixing pump is transported to the transmission device through the gas-liquid transport pipeline, and the temperature and gas sensing device issues an instruction to drive the transmission device to cut the battery connectors on both sides of the pole of the battery cell experiencing thermal runaway, so that the battery cell falls onto the lower box cover;

[0009] When a battery cell falls onto the lower box cover, the gravity sensing device detects the gravity change of the lower box cover and separates the lower box cover from the battery box body and drops it.

[0010] A further technical solution is that the siphon effect device includes a cylindrical pipe immersed in the water tank and an external cylindrical sleeve, a gap is formed between the cylindrical pipe and the cylindrical sleeve, and an air suction hole is opened on the outside of the cylindrical sleeve, and the air suction hole is connected to the liquid inlet of the gas-liquid mixing pump through a pipe.

[0011] A further technical solution is that the gas-liquid mixing pump is provided with a liquid inlet, an air inlet and an outlet, the air inlet is connected to the outside air, and the outlet is connected to a transmission device through a gas-liquid transport pipeline, the transmission device includes a turbine and a fan-shaped blade, the turbine is driven by the gas-liquid mixture and drives the fan-shaped blade to cut the battery connecting piece, and the lower end of the turbine is also provided with a discharge hole for spraying the discharged gas-liquid mixture to the battery cell that has thermal runaway, so as to enhance its individual cooling.

[0012] A further technical solution is that the gravity sensing device is distributed on both sides of the bottom of the lower box cover, and the gravity sensing device includes a telescopic screw and a connecting hole. One end of the telescopic screw is fixed to the bottom of the lower box cover, and the other end is detachably connected to the connecting holes on both sides of the battery box body; when a gravity change is detected, the telescopic screw is extended to separate the lower box cover from the battery box body.

[0013] A further technical solution is that a blade hole and a probe hole are opened at the bottom of the upper box cover, and the blade hole is used for a fan-shaped blade to pass through and cut the battery connecting piece; the temperature and gas sensing device includes a temperature and gas sensor and a sensing probe, and the sensing probe passes through the probe hole and is arranged opposite to the pressure relief valve of the battery cell; when the battery cell in the battery module has thermal runaway, the sensing probe of the temperature and gas sensor above the pressure relief valve of the battery cell receives the gas and temperature signal, and transmits it to the temperature and gas sensor above, and the temperature and gas sensor issues an operating instruction to the gas-liquid mixing pump.

[0014] A further technical solution is that a support plate is provided inside the battery box, and the support plate is used to support the battery connecting piece, so that the battery module is suspended above the lower box cover and forms a gap; the connection between the battery connecting piece and the battery pole is a hanging type, and after the battery connecting piece is cut, the thermal runaway battery cell can fall to the lower box cover.

[0015] According to a further technical solution, the top of the upper box cover is a transmission cover, and the transmission device and the temperature and gas sensing device are installed on the transmission cover. A discharge hole is provided at the lower end of the turbine for spraying the gas-liquid mixture toward the thermal runaway battery cell.

[0016] As a further technical solution, the gas-liquid mixing pump transports the coolant in the water tank to the inner cavity of the upper box cover through a siphon effect device, and flows into the battery box through the blade hole, thereby achieving liquid cooling of the thermal runaway battery cells.

[0017] The present invention provides a battery thermal runaway emergency prevention and control device, which has the following beneficial effects:

[0018] The present invention rationally designs the battery box structure, utilizes a gas-liquid mixing pump to drive a siphon effect device to perform emergency liquid cooling on the battery thermal runaway, utilizes the gas-liquid mixing pump to drive a transmission device to cut so that the battery monomer experiencing thermal runaway is separated from the battery module, and is removed by a gravity sensing device. In this way, the battery module experiencing thermal runaway is cooled while the battery monomer experiencing thermal runaway is checked and cut and separated, which can effectively block the spread of thermal runaway in the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 Schematic diagram of the battery module and box of the present invention;

[0021] Figure 3 It is a partial cross-sectional structural schematic diagram of the present invention;

[0022] Figure 4 Schematic diagram of the coolant circuit of the present invention;

[0023] Figure 5 This is a schematic diagram of the main cross-sectional structure of the present invention;

[0024] Figure 6 Schematic diagram of the gas circuit of the present invention;

[0025] Figure 7 Schematic diagram of the transmission structure of the present invention;

[0026] Figure 8 This is a schematic diagram of the upper box cover structure of the present invention;

[0027] Figure 9 It is a partial cross-sectional structural schematic diagram of the present invention;

[0028] Figure 10 Schematic diagram of the control strategy of the present invention.

[0029] Figure: 1. Battery module; 2. Battery case; 3. Upper case cover; 4. Lower case cover; 10. Transmission cover; 11. Heat shield; 12. Battery connector; 13. Water tank; 14. Support plate; 15. Pressure relief valve; 16. Terminal; 17. Blade hole; 18. Probe hole.

[0030] 5. Gravity sensing device: 50. Telescopic screw; 51. Connecting hole;

[0031] 6. Gas-liquid mixing pump: 60, liquid inlet; 61, air inlet; 62, outlet;

[0032] 7. Transmission device: 70. Gas and liquid transport pipeline; 71. Turbine; 72. Fan-shaped blade;

[0033] 8. Siphon effect device: 80. Cylindrical pipe; 81. Cylindrical sleeve; 82. Air suction hole;

[0034] 9. Temperature and gas sensing devices: 90. Temperature and gas sensors; 91. Sensing probes. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0037] like Figure 1-10 As shown, a battery thermal runaway emergency prevention and control device provided by an embodiment of the present invention includes a battery case 2, a battery module 1 is suspended inside the battery case 2, and an upper case cover 3 and a lower case cover 4 are respectively provided on the top and bottom of the battery case 2; a heat insulation plate 11 is provided between adjacent battery cells in the battery module 1, and the poles 16 of adjacent battery cells are connected by a battery connecting piece 12, that is, the battery module 1 is wrapped by the battery case 2, and the heat insulation plate 11 separates the battery cells.

[0038] The upper box cover 3 is provided with a gas-liquid mixing pump 6 and a water tank 13, and a siphon effect device 8 is provided on the inner side of the water tank 13; when a battery cell in the battery module 1 experiences thermal runaway, the sensing probe 91 of the temperature and gas sensor 90 above the battery cell pressure relief valve 15 receives the gas and temperature signals and transmits them to the temperature and gas sensor 90 above. The temperature and gas sensor 90 issues an operating instruction to the gas-liquid mixing pump 6. At this time, the suction force generated by the liquid inlet 60 of the gas-liquid mixing pump 6 will drive the siphon effect device 8 in the water tank 13 to work, and the siphon effect device 8 will transport the coolant in the water tank 13 from top to bottom to the inner cavity of the upper box cover 3 , flows into the battery box 2 through the fan-shaped blade holes 17 evenly distributed on the upper box cover 3, thereby realizing rapid cooling of the battery monomer that has thermal runaway; the gas-liquid mixture generated by the operation of the gas-liquid mixing pump 6 is transported to the transmission device 7 through the gas-liquid transportation pipeline 70, and the temperature and gas sensing device 9 issues an instruction to drive the turbine 71 on the transmission device 7 to drive the fan-shaped blade 72 to cut the battery connecting pieces 12 on both sides of the pole 16 of the battery monomer that has thermal runaway, so that the battery monomer falls onto the lower box cover 4, and a discharge hole 73 is opened at the lower end of the turbine 71, which can spray the discharged gas-liquid mixture to the battery monomer that has thermal runaway, thereby strengthening its individual cooling.

[0039] Two gravity sensing devices 5 are provided at the bottom of the lower box cover 4, distributed on the left and right sides, and are connected to the connection holes 51 on the left and right sides of the box body 2 through telescopic screws 50. When a battery cell falls onto the lower box cover 4, the gravity sensing device 5 will detect the gravity change on the lower box cover 4. At this time, the telescopic screw 50 extends, causing the lower box cover 4 and the gravity sensing device 5 to separate from the battery box body 2 and fall. The battery cell that falls onto the lower box cover 4 will also fall and be discharged to the outside.

[0040] The present invention rationally designs the structure of the battery box 2, utilizes the temperature and gas sensing device 9 for real-time monitoring, uses the gas-liquid mixing pump 6 to drive the siphon effect device 8 to perform emergency liquid cooling on the battery thermal runaway, and utilizes the gas-liquid mixing pump 6 to drive the fan-shaped blade 72 on the transmission device 7 to cut the battery connecting piece 12, so that the battery cell experiencing thermal runaway is separated from the battery module 1 and removed by the gravity sensing device 5, thereby effectively blocking the spread of the battery thermal runaway.

[0041] like Figure 2 As shown, as a preferred embodiment of the present invention, the interior of the battery box 2 is provided with a plurality of support plates 14 for supporting the battery connecting piece 12, that is, the support plates 14 act on the battery connecting piece 12, and the battery module 1 can be suspended above the lower box cover 4, so that a gap is left between the battery module 1 and the lower box cover 4, so as to trigger the gravity sensing device 5 when a battery cell with thermal runaway occurs falls.

[0042] The battery connecting piece 12 and the battery pole 16 are connected in a hanging manner. By cutting the battery connecting piece 12 on both sides of the battery cell having thermal runaway, the battery cell can be dropped onto the lower box cover 4 .

[0043] like Figure 4 and 6 As shown in FIG. 1 , as a preferred embodiment of the present invention, the gas-liquid mixing pump 6 is provided with a liquid inlet 60, an air inlet 61 and an outlet 62. The air inlet 61 is in communication with the outside air, the liquid inlet 60 is connected to the siphon effect device 8 via a pipeline, and the outlet 62 is connected to the transmission device 7 via a gas-liquid transport pipeline 70. This allows the gas-liquid mixing pump 6 to drive the siphon effect device 8 to cool the battery module 1 while pushing the blade 72 on the transmission device 7 to cut the battery connector 12 of the battery cell that has experienced thermal runaway. The gas circuit diagram is shown in FIG. Figure 6 Indicated by the arrow.

[0044] like Figure 3 and 4 As shown in FIG. 1 , as a preferred embodiment of the present invention, the siphon effect device 8 is composed of a cylindrical pipe 80 immersed in the water tank 13 and a cylindrical sleeve 81 outside the cylindrical pipe 80. A gap is provided between the cylindrical pipe 80 and the cylindrical sleeve 81. An air intake hole 82 is provided on the outside of the cylindrical sleeve 81 and is connected to the liquid inlet 60 of the gas-liquid mixing pump 6 through a pipe. The siphon effect is generated by the action of air pressure, so that the coolant in the water tank 13 flows back into the battery box 2 below through the cylindrical pipe 80 to cool the battery cell that has thermal runaway. The schematic diagram of the coolant circuit is shown in FIG. Figure 4 Indicated by the arrow.

[0045] like Figure 7As shown, as a preferred embodiment of the present invention, the top of the upper box cover 3 is a transmission device cover plate 10, and the transmission device 7 and the temperature and gas sensing device 9 are installed on the transmission device cover plate 10. The turbine 71 on the transmission device 7 is driven by the gas-liquid mixture generated by the gas-liquid mixing pump 6, and then drives the fan-shaped blade 72 below it to cut the battery connecting piece 12, so that the battery cell that has thermal runaway is separated from the battery module 1.

[0046] like Figure 2 、 7 As shown in FIG8 , as a preferred embodiment of the present invention, the sensing probe 91 on the temperature and gas sensing device 9 passes through the probe hole 18 opened at the bottom of the upper box cover 3 , and the sensing probe 91 is arranged opposite to the pressure relief valve 15 of the battery cell.

[0047] The bottom of the upper box cover 3 is also provided with a blade hole 17 for the fan-shaped blade 72 to pass through, so as to facilitate cutting of the battery connecting piece 12.

[0048] like Figure 9 As shown, as a preferred embodiment of the present invention, the gravity sensing device 5 is fixed to both sides of the bottom of the lower box cover 4, and the lower box cover 4 is connected to the connection holes 51 on both sides of the battery box body 2 through the telescopic screw 50; when a battery cell falls onto the lower box cover 4, the gravity sensing device 5 will detect the gravity change on the lower box cover 4, and the telescopic screw 50 will extend at this time, so that the lower box cover 4, the gravity sensing device 5 and the battery cell that has thermal runaway will simultaneously detach from the battery box body 2 and fall.

[0049] The above embodiment of the present invention provides a battery thermal runaway emergency prevention and control device, the working principle of which is as follows:

[0050] During use, when a battery cell in the battery module 1 experiences thermal runaway, the sensing probe 91 of the temperature and gas sensor 90 above the battery cell pressure relief valve 15 will receive the gas and temperature signals and transmit them to the corresponding temperature and gas sensor 90 above. The temperature and gas sensor 90 will issue an operation instruction to the gas-liquid mixing pump 6. At this time, the air inlet 61 of the gas-liquid mixing pump 6 draws in external air, and the liquid inlet 60 of the gas-liquid mixing pump 6 is connected to the air suction hole 82 of the siphon effect device 8. The suction force generated by the liquid inlet 60 draws away the air in the interlayer space between the cylindrical pipe 80 and the cylindrical sleeve 81. Under the action of air pressure, the water in the water tank 13 enters the cylindrical pipe 80 through the interlayer space between the cylindrical pipe 80 and the cylindrical sleeve 81. The coolant in the water tank 13 is transported from top to bottom to the inner cavity of the upper box cover 3, and flows into the battery box body 2 through the fan-shaped blade holes 17 evenly distributed on the upper box cover 3, so as to realize rapid cooling of the battery module 1 that has thermal runaway. The gas-liquid mixture generated by the operation of the gas-liquid mixing pump 6 is transported to the transmission device 7 through the gas-liquid transport pipeline 70. The temperature and gas sensing device 9 issues an instruction to push the turbine 71 on the transmission device 7 to drive the fan-shaped blade 72 to cut the battery connecting piece 12 on both sides of the battery cell pole 16 that has thermal runaway, so that the battery cell falls onto the lower box cover 4. A discharge hole 73 is opened below the turbine 71, and the discharged gas-liquid mixture can be sprayed to the battery cell that has thermal runaway, so as to strengthen its cooling separately. Two gravity sensors 5 are located on the bottom of the battery lower cover 4, one on each side. These are connected to the connection holes 51 on the left and right sides of the battery case 2 via telescopic screws 50. When a battery cell falls onto the lower cover 4, the gravity sensors 5 detect the change in gravity on the lower cover 4. At this point, the telescopic screws 50 extend, causing the lower cover 4 and the gravity sensors 5 to separate from the battery case 2 and fall. The battery cell that fell onto the lower cover 4 will also fall and be discharged to the outside. If another battery cell subsequently experiences thermal runaway, the above operation will be repeated to separate the battery cell from the battery module 1 and discharge it.

[0051] To sum up, the present invention rationally designs the structure of the battery box 2, utilizes the gas-liquid mixing pump 6 to drive the siphon effect device 8 to perform emergency liquid cooling on the battery thermal runaway, utilizes the gas-liquid mixing pump 6 to drive the transmission device 7 to cut so that the battery cell experiencing thermal runaway is separated from the battery module 1, and is removed by the gravity sensing device 5, thereby achieving the cooling of the battery module 1 experiencing thermal runaway while checking and cutting and separating the battery cell experiencing thermal runaway, which can effectively block the spread of thermal runaway of the battery module.

[0052] The control, model, and circuit connection of each component are not specifically limited and can be flexibly configured in actual applications. The circuits, electronic components, and modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by this invention does not involve improvements to the software and methods.

[0053] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A battery thermal runaway emergency prevention and control device, comprising a battery box (2), a battery module (1) suspended inside the battery box (2), and an upper box cover (3) and a lower box cover (4) respectively provided on the top and bottom of the battery box (2); A heat insulation plate (11) is provided between adjacent battery cells in the battery module (1), and the poles (16) of adjacent battery cells are connected via a battery connecting piece (12), and the battery module is characterized in that: The upper box cover (3) is provided with a gas-liquid mixing pump (6) and a water tank (13), and the water tank (13) is provided with a siphon effect device (8); A gravity sensing device (5) is provided at the bottom of the lower box cover (4); The device also includes a transmission device (7) and a temperature and gas sensing device (9) installed on the upper box cover (3), wherein the temperature and gas sensing device (9) is used to detect the gas and temperature signals of the battery cell pressure relief valve (15) and trigger the gas-liquid mixing pump (6) and the transmission device (7) to operate; When a battery cell in the battery module (1) experiences thermal runaway, the temperature and gas sensing device (9) receives the gas and temperature signals from the corresponding battery cell pressure relief valve (15), and the temperature and gas sensing device (9) issues an operation instruction to the gas-liquid mixing pump (6). At this time, the suction force generated by the gas-liquid mixing pump (6) drives the siphon effect device (8) in the water tank (13) to work. The siphon effect device (8) transports the coolant in the water tank (13) from top to bottom to the inner cavity of the upper box cover (3), and flows into the battery box (2) through the blade holes (17) evenly distributed on the upper box cover (3), thereby realizing rapid cooling of the battery cell experiencing thermal runaway; The gas-liquid mixture generated by the operation of the gas-liquid mixing pump (6) is transported to the transmission device (7) through the gas-liquid transport pipeline (70). The temperature and gas sensing device (9) issues a command to drive the transmission device (7) to cut the battery connecting pieces (12) on both sides of the battery cell pole (16) that has thermal runaway, so that the battery cell falls onto the lower box cover (4); When a battery cell falls onto the lower box cover (4), the gravity sensing device (5) detects the gravity change of the lower box cover (4) and causes the lower box cover (4) to separate from the battery box body (2) and fall.

2. The battery thermal runaway emergency prevention and control device according to claim 1, characterized in that: The siphon effect device (8) comprises a cylindrical pipe (80) immersed in a water tank (13) and an external cylindrical sleeve (81), a gap is formed between the cylindrical pipe (80) and the cylindrical sleeve (81), an air suction hole (82) is opened on the outside of the cylindrical sleeve (81), and the air suction hole (82) is connected to the liquid inlet (60) of the gas-liquid mixing pump (6) through a pipe.

3. The battery thermal runaway emergency prevention and control device according to claim 2, characterized in that: The gas-liquid mixing pump (6) is provided with a liquid inlet (60), an air inlet (61) and an outlet (62); The air inlet (61) is in communication with the outside air, and the outlet (62) is connected to the transmission device (7) via a gas-liquid transport pipeline (70); The transmission device (7) includes a turbine (71) and a fan-shaped blade (72), wherein the turbine (71) is driven by a gas-liquid mixture and drives the fan-shaped blade (72) to cut the battery connecting piece (12); The lower end of the turbine (71) is also provided with a discharge hole (73) for spraying the discharged gas-liquid mixture toward the battery cell experiencing thermal runaway to enhance cooling thereof individually.

4. The battery thermal runaway emergency prevention and control device according to any one of claims 1 to 3, characterized in that: The gravity sensing device (5) is distributed on both sides of the bottom of the lower box cover (4), and the gravity sensing device (5) includes a telescopic screw (50) and a connecting hole (51); One end of the telescopic screw (50) is fixed to the bottom of the lower box cover (4), and the other end is detachably connected to the connection holes (51) on both sides of the battery box (2); When a change in gravity is detected, the telescopic screw (50) extends, causing the lower box cover (4) to separate from the battery box body (2).

5. The battery thermal runaway emergency prevention and control device according to claim 3, characterized in that: The bottom of the upper box cover (3) is provided with a blade hole (17) and a probe hole (18), wherein the blade hole (17) is used for the fan-shaped blade (72) to pass through and cut the battery connecting piece (12); The temperature and gas sensing device (9) includes a temperature and gas sensor (90) and a sensing probe (91), wherein the sensing probe (91) passes through the probe hole (18) and is arranged opposite to the pressure relief valve (15) of the battery cell; When a battery cell in the battery module (1) experiences thermal runaway, a sensing probe (91) of a temperature and gas sensor (90) above the battery cell pressure relief valve (15) receives a gas and temperature signal and transmits the signal to the temperature and gas sensor (90) above. The temperature and gas sensor (90) then issues an operating instruction to the gas-liquid mixing pump (6).

6. The battery thermal runaway emergency prevention and control device according to claim 5, characterized in that: A support plate (14) is provided inside the battery box (2), and the support plate (14) is used to support the battery connecting piece (12), so that the battery module (1) is suspended above the lower box cover (4) and forms a gap; The battery connecting piece (12) and the battery pole (16) are connected in a hanging manner. After the battery connecting piece (12) is cut, the thermal runaway battery cell can fall onto the lower box cover (4).

7. The battery thermal runaway emergency prevention and control device according to claim 5 or 6, characterized in that: The top of the upper box cover (3) is a transmission device cover plate (10), and the transmission device (7) and the temperature and gas sensing device (9) are installed on the transmission device cover plate (10).

8. The battery thermal runaway emergency prevention and control device according to claim 5 or 6, characterized in that: The gas-liquid mixing pump (6) transports the coolant in the water tank (13) to the inner cavity of the upper box cover (3) through the siphon effect device (8), and flows into the battery box (2) through the blade hole (17), thereby achieving liquid cooling of the thermal runaway battery cell.

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