Thermal runaway protection device for battery of energy storage power station

Abstract

The utility model relates to the technical field of fire fighting in electrical equipment, in particular to a battery thermal runaway protection device for an energy storage power station. The device comprises a shell, and further comprises a foam stock solution box, a water tank, a gas cylinder, a foam generator, a heating device and a ventilation device, the foam stock solution box is connected with a stock solution pump and a first electric proportional valve, the first electric proportional valve is connected with a stock solution conveying pipe, and the stock solution conveying pipe is connected with the stock solution pump; the water tank is connected with a second electric proportional valve which is connected with a water conveying pipe. The gas cylinder is connected with a third electric proportional valve, the third electric proportional valve is connected with a gas feeding pipe, the gas feeding pipe is connected with a pumping bin, the foam generator is connected with the pumping bin, the foam generator is connected with the gas feeding pipe, the foam generator is connected with a foam conveying pipe, the foam conveying pipe is communicated with a liquid outlet, and the liquid outlet is communicated with a fire fighting water pipeline; the heating device is fixed to the wall of the water tank, and the ventilation device is fixed to the shell. The device is used for extinguishing fire when the battery of the energy storage power station is in thermal runaway.

Description

Technical Field

[0001] The utility model relates to the technical field of fire protection in electrical equipment, in particular to a thermal runaway protection device for batteries in an energy storage power station. Background Art

[0002] With the continuous development and maturity of energy storage technology, the energy storage industry has grown rapidly, and fire accidents in energy storage power stations have attracted close attention. Under various abuse conditions, the battery will experience thermal runaway due to excessive heat. For example, if the battery is overheated, overcharged, or over-discharged, chemical reactions will occur between various materials inside the battery, generating a large amount of heat and releasing a large amount of flammable gas, causing thermal runaway of the battery, and ultimately inducing safety accidents such as fire or explosion in the energy storage power station.

[0003] The current safety protection means are single, using perfluorohexanone or heptafluoropropane fire extinguishing agents for fire extinguishing. Both fire extinguishing agents are very volatile, and the saturated vapor pressure of the products under normal temperature conditions is very easy to leak, and the airtightness requirements of the tank are extremely high; in addition, the pressure of the pressure storage fire extinguisher is high, and there are safety hazards in transportation and storage. During the fire extinguishing process, the high pressure is easy to cause damage to the battery pack, affecting the fire extinguishing effect; in addition, the two agents are expensive and easily produce toxic and harmful substances at high temperatures. Therefore, it is urgent to develop a new fire extinguisher device for energy storage systems. Utility Model Content

[0004] In view of the technical problems that perfluorohexanone or heptafluoropropane fire extinguishing agents are used as standing fire extinguishing devices for fire extinguishing in energy storage power stations in the prior art, the two fire extinguishing agents are relatively costly and are prone to leakage during transportation or storage, the utility model provides a thermal runaway protection device for batteries in energy storage power stations, which uses compressed inert gas and water-based fire extinguishing agents to form foam fire extinguishing in coordination, on the one hand forming an inert environment and cutting off oxygen combustion aids, and on the other hand the fire extinguishing agent captures and encapsulates the thermal runaway alkane fuel of the battery to form microcapsules to reduce its flammability and take it away from the fire zone and inhibit the free radical chain reaction in the flame to improve the fire extinguishing performance of the water mist.

[0005] On the one hand, the utility model provides a thermal runaway protection device for batteries in an energy storage power station, comprising a shell, and also comprising: a foam raw liquid tank, the foam raw liquid tank is connected to a raw liquid pump, a first electric proportional valve, a first air valve and a first liquid level gauge, the first electric proportional valve is connected to a raw liquid delivery pipe, the raw liquid delivery pipe is connected to a raw liquid pump and a first flow meter, and the raw liquid delivery pipe is connected to a first one-way valve; a water tank, the water tank is connected to a water pump, a second electric proportional valve, a second air valve and a second liquid level gauge, the second electric proportional valve is connected to a water delivery pipe, the water delivery pipe is connected to a second flow meter, the water delivery pipe is connected to a second one-way valve, and the water tank is fixedly connected to the foam raw liquid tank; a gas cylinder, the gas cylinder is connected to a third electric proportional valve, the third electric proportional valve is connected to an air delivery pipe, the air delivery pipe is connected to a pumping bin, and a first solenoid valve is arranged between the air delivery pipe and the pumping bin The pumping bin is connected to the raw liquid delivery pipe and the water delivery pipe, the air delivery pipe is connected to a first air pump, the first air pump can be connected to the gas cylinder, the air delivery pipe is also connected to a second air pump connected to an external air source, and the second air pump is connected to a second solenoid valve; a foam generator, the foam generator is connected to the pumping bin, the foam generator is also connected to the air delivery pipe, a third solenoid valve is arranged between the foam generator and the air delivery pipe, the foam generator is connected to a foam delivery pipe, the foam delivery pipe is connected to a liquid outlet, the liquid outlet is also connected to a fire water pipe, the fire water pipe is connected to the foam delivery pipe, the fire water pipe is arranged with a fourth one-way valve, and the foam delivery pipe is also arranged with a fourth electric proportional valve; a heating device, the heating device is fixedly arranged on the wall of the water tank; a ventilation device, the ventilation device is fixed to the shell.

[0006] Furthermore, the air supply pipe is connected with a pressure relief valve. The air supply pipe can be connected with the pumping bin, the foam generator, etc. When the environmental pressure of the pumping bin, the foam generator, etc. is too high, the pressure relief valve can protect the protective device so that the protective device can play a normal fire extinguishing role.

[0007] Furthermore, the pumping bin is connected with a tee, and the tee is connected with a water delivery pipe and a raw liquid delivery pipe.

[0008] Furthermore, the fire water pipeline is provided with a filter to filter the fire water and reduce the influence of impurities on the pipeline and the fire extinguishing effect.

[0009] Furthermore, a UPS power supply for backup power supply is included, the UPS is fixed to a fixing plate, the UPS power supply is provided with a charging port, and the fixing plate is fixed to the bottom of the shell. A backup power supply is provided for the protection device, and when the main power supply of the protection device fails due to thermal runaway of the battery, the UPS power supply serves as a backup power supply to power the protection device, thereby ensuring the normal operation of the protection device.

[0010] Furthermore, the foam stock liquid tank is provided with a first manual valve. The first manual valve is provided to drain the foam stock liquid or add liquid.

[0011] Furthermore, the water tank is provided with a second manual valve. The second manual valve is provided to empty the water tank or add water to the water tank.

[0012] Furthermore, the heating device includes a heating tube, and a heating tube groove is fixedly connected to the peripheral wall of the water tank, and the heating tube is inserted into the heating tube groove. The heating tube groove is bolted with a limit cap, and the limit cap is provided with a wire groove opened from the edge inward for the heating wire to pass through. When the ambient temperature is too low, the heating device is turned on, and the heating device heats the water tank to prevent the water from freezing and affecting the use. The increase in the temperature of the water tank will also slightly increase the temperature of the surrounding environment to protect the protective device from the influence of low temperature; the heating tube is inserted into the heating tube groove, the structure is simple and convenient, the fixing effect of the heating tube is good, and the disassembly and assembly are also very convenient. Even if the heating position is changed, it is very convenient, and it only needs to change the position where the heating tube groove is fixed on the peripheral wall of the water tank.

[0013] Furthermore, the gas cylinder is provided with a first pressure gauge, a second pressure gauge is provided between the external gas source and the gas supply pipe, and a third pressure gauge is provided between the foam generator and the gas supply pipe.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides a thermal runaway protection device for batteries in energy storage power stations, which adopts compressed inert gas and water-based fire extinguishing agent to form foam fire extinguishing in cooperation, so as to form an inert environment and cut off the oxygen combustion aid on the one hand, and on the other hand, the fire extinguishing agent can capture and encapsulate the thermal runaway alkane fuel of the battery to form microcapsules to reduce its flammability and take it away from the fire zone and inhibit the free radical chain reaction in the flame to improve the fire extinguishing performance of the water mist.

[0016] The flow and pressure of the fluid in the foam liquid tank, water tank, and gas cylinder can be monitored and controlled in real time. When the flow is too large or too small, the valve is adjusted to control the flow of the fluid in the foam liquid tank, water tank, and gas cylinder and the flow in each corresponding pipeline; when the pressure is high, the pressure relief valve is adjusted to control the flow of the fluid in the foam liquid tank, water tank, and gas cylinder and the pressure in each corresponding pipeline.

[0017] The foam stock solution is first mixed with water, and then the gas is added in the foam generator to generate foam. The foam has a good mixing effect and a better fire extinguishing effect. The gas uses inert gas to form an inert environment. The foam captures and encapsulates the battery thermal runaway alkane fuel to form microcapsules to reduce its flammability and play a better fire extinguishing role. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is a schematic structural diagram of the vertical plane of the utility model.

[0021] Figure 3 This is a schematic diagram of the structure of the foam generation related device of the utility model.

[0022] Figure 4 It is a schematic diagram of the structure of the shell.

[0023] In the figure, 1-emergency start button, 2-emergency stop button, 3-status indicator light, 4-gas cylinder, 5-fixed frame, 6-pressure gauge, 7-air supply pipe, 8-first manual valve, 9-foam raw liquid tank, 10-first electric proportional valve, 11-raw liquid delivery pipe, 14-foam delivery pipe, 15-control system assembly, 16-water tank connecting pipe, 18-second electric proportional valve, 19-second liquid level gauge, 20-second ventilation valve, 21-heating device, 23-water tank, 24-ventilation device, 30-second manual valve, 31-first ventilation valve, 32-fifth one-way valve, 33-first liquid level gauge, 41-three-way, 42-first manual regulating valve, 43-first one-way valve, 44 -raw liquid pump, 45-first flow meter, 46-water fire fighting liquid inlet, 47-Y-type filter, 48-fourth one-way valve, 49-liquid outlet, 50-fourth pressure gauge, 51-air pump, 52-third one-way valve, 53-foam generator, 54-second manual regulating valve, 55-third flow meter, 56-first solenoid valve, 57-fourth electric proportional valve, 58-third electric proportional valve, 59-second pressure gauge, 60-first pressure gauge, 61-pressure relief valve, 62-external air source interface, 63-second one-way valve, 64-first air distribution valve, 65-second air distribution valve, 80-bottom plate, 81-UPS power supply, 82-fixed plate, 83-charging port, 84-PLC controller. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0025] like Figure 1-Figure 4 As shown, an embodiment of the utility model provides a thermal runaway protection device for batteries in an energy storage power station, including a shell and a foam stock liquid tank 9, the foam stock liquid tank 9 is connected to a stock liquid pump 44, a first electric proportional valve 10, a first air valve 31 and a first liquid level meter 33, the first electric proportional valve 10 is connected to a stock liquid delivery pipe 11, the stock liquid delivery pipe 11 is connected to a stock liquid pump 44 and a first flow meter 45, and the stock liquid delivery pipe 11 is connected to a first one-way valve 43. The stock liquid pump 44 pumps the foam stock liquid out of the foam stock liquid tank 9 and mixes it with water. The first electric proportional valve 10 controls the flow rate of the foam stock liquid in the stock liquid delivery pipe 11. When the flow rate of the foam stock liquid in the stock liquid delivery pipe 11 is too fast, it can be reduced. The flow rate in the stock liquid delivery pipe 11 is monitored by the first flow meter 45. When the flow rate of the foam stock liquid in the stock liquid delivery pipe 11 is too low, it can be increased. The first air-permeable valve 31 is used to balance the pressure difference between the inside and outside of the foam stock liquid tank 9. The first liquid level meter 33 is used to monitor the liquid level of the foam stock liquid in the foam stock liquid tank 9. The stock liquid delivery pipe 11 is connected to the first one-way valve 43 to prevent the foam stock liquid from flowing back to the foam stock liquid tank 9. The stock liquid delivery pipe 11 is also provided with a first manual regulating valve 42 for manually adjusting the flow rate of the foam stock liquid.

[0026] The protective device also includes a water tank 23, which is connected to a water pump, a second electric proportional valve 18, a second air-permeable valve 20 and a second liquid level meter 19. The second electric proportional valve 18 is connected to a water pipe, the water pipe is connected to a second flow meter, the water pipe is connected to a second one-way valve 63, and the water tank 23 is fixedly connected to the foam stock liquid tank 9. The water pump pumps water out of the water tank 23 and mixes it with water. The second electric proportional valve 18 controls the flow rate of water in the water pipe. When the flow rate of water in the water pipe is too fast, it can be reduced. The size of the flow in the water pipe is monitored by the second flow meter. When the flow rate of water in the water pipe is too low, it can be increased. The second air-permeable valve 20 is used to balance the pressure difference between the inside and outside of the water tank 23. The second liquid level meter 19 is used to monitor the liquid level of water in the water tank 23. The water pipe is connected to a second one-way valve 63 to prevent water from flowing back to the water tank 23.

[0027] The gas cylinder 4 is fixed to the fixing frame 5, the gas cylinder 4 is connected to a pressure gauge 6, the gas cylinder 4 is connected to a third electric proportional valve 58, the third electric proportional valve 58 is connected to an air supply pipe 7, the air supply pipe 7 is connected to a pumping bin, a first electromagnetic valve 56 is arranged between the air supply pipe 7 and the pumping bin, the pumping bin is connected to the raw liquid delivery pipe 11 and the water delivery pipe, the air supply pipe 7 is connected to a first air pump 51, the first air pump 51 can be connected to the gas cylinder 4, the air supply pipe 7 is also connected to a second air pump 51 connected to an external air source, and the second air pump 51 is connected to a second electromagnetic valve. A first air distribution valve 64 is arranged on the air supply pipe 7, the first air distribution valve 64 is connected to the gas cylinder 4 and the external air source interface 62, and a second air distribution valve 65 is also arranged on the air supply pipe 7, the second air distribution valve 65 is respectively connected to the pumping bin and the foam generator 53. The gas cylinder 4 is provided with a fifth one-way valve 32 to prevent the external air source from entering the gas cylinder 4. The foam generator 53 is connected to the pumping bin, and the foam generator 53 is also connected to the air supply pipe 7. A third solenoid valve is arranged between the foam generator 53 and the air supply pipe 7. The foam generator 53 is connected to the foam delivery pipe 14. A third one-way valve 52 is arranged on the foam delivery pipe 14 to prevent fire water from flowing into the foam generator 53. The foam delivery pipe 14 is connected to the liquid outlet 49, and the liquid outlet 49 is also connected to the fire water pipeline. The fire water pipeline is connected to the foam delivery pipe 14. The fire water pipeline is provided with a fourth one-way valve 48. The foam delivery pipe 14 is also provided with a fourth electric proportional valve 57; the gas cylinder 4 stores inert gas, and the third electric proportional valve 58 controls the flow rate of the inert gas in the air supply pipe 7 When the flow rate of the inert gas in the air delivery pipe 7 is too fast, it can be adjusted down. The flow rate in the air delivery pipe 7 is monitored by the second flow meter. When the flow rate of the inert gas in the air delivery pipe 7 is too low, it can be adjusted up. The gas flow rate in the air delivery pipe 7 is monitored by the third flow meter 55. The foam stock solution and water are pumped to the pumping bin through the three-way 41 for preliminary mixing. The air pump 51 sends the mixed liquid of the foam stock solution and water to the foam generator 53. The water tank connecting pipe 16 connects the water tank 23 and the air pump 51. The foam generator 53 is connected to the air delivery pipe 7 to add gas to mix the foam stock solution, water and inert gas. The fire extinguishing agent flows out from the foam generator 53 along the foam delivery pipe 14 to the liquid outlet 49 to extinguish the fire. When the gas in the gas cylinder 4 leaks or runs out, the foam generator 53 uses an external gas source. The second air pump 51 pumps the external gas source into the foam generator 53 to produce foam. The first solenoid valve 56 is arranged between the air delivery pipe 7 and the pumping bin to control the use of the foam stock solution and water. The second solenoid valve is arranged on the second air pump 51 to control whether the external air source is connected for use. The third solenoid valve is arranged between the foam generator 53 and the air delivery pipe 7 to control whether the inert gas is pumped into the foam generator 53 for use. A fourth electric proportional valve 57 is also arranged in the foam delivery pipe 14 to control the flow rate of the foam fire extinguisher after mixing in the foam delivery pipe 14. A second manual regulating valve 54 is arranged on the air delivery pipe 7 to manually control the gas flow.

[0028] In the embodiment of the utility model, a water fire-fighting liquid inlet 46 is provided for connecting to an external fire-fighting water pipe. When the foam is exhausted, the fire-fighting water pipe is started, and the fire-fighting water flows out through the liquid outlet 49 to continue the fire-fighting work. The fire-fighting water pipe is provided with a Y-type filter 47 to filter the fire-fighting water entering the fire-fighting water pipe to prevent impurities from affecting the fire-fighting. A fourth one-way valve 48 is provided in the fire-fighting water pipe to prevent the mixed foam fire-extinguishing agent from flowing into the fire-fighting water pipe, but to flow out from the liquid outlet 49 to play a role in fire-fighting.

[0029] The foam liquid tank 9 is provided with a first manual valve 8, which can drain the foam liquid or add liquid. The water tank 23 is provided with a second manual valve 30, which can drain the water tank 23 or add water to the water tank 23.

[0030] The heating device 21 is fixedly arranged on the wall of the water tank 23. The heating device 21 includes a heating pipe. The peripheral wall of the water tank 23 is fixedly connected with a heating pipe groove. The heating pipe is inserted into the heating pipe groove. The heating pipe groove is bolted with a limit cap. The limit cap is provided with a wire groove opened from the edge inward for the heating wire to pass through. When the ambient temperature is too low, the heating device 21 is turned on. The heating device 21 heats the water tank 23 to prevent the water from freezing and affecting the use. The increase in the temperature of the water tank 23 will also increase the temperature of the surrounding environment slightly, protecting the protective device from the low temperature. The heating pipe is inserted into the heating pipe groove, the structure is simple and convenient, the fixing effect of the heating pipe is good, and the disassembly and assembly are also very convenient. Even if the heating position is changed, it is very convenient. It only needs to replace the position where the heating pipe groove is fixed on the peripheral wall of the water tank 23.

[0031] The ventilation device 24 is fixed to the housing and includes a fan, which cools the protective device by blowing air.

[0032] The housing is fixed with a UPS power supply 81 for backup power supply, the UPS is fixed to a fixing plate 82, the UPS power supply 81 is provided with a charging port 83, and the fixing plate 82 is fixed to the bottom plate 80 of the housing. A backup power supply is provided for the protection device. When the main power supply of the protection device fails due to thermal runaway of the battery, the UPS power supply 81 serves as a backup power supply to power the protection device to ensure the normal operation of the protection device.

[0033] In an embodiment of the utility model, a PLC controller 84 is fixed to the shell, and after the first flow meter 45 inputs the monitored flow data signal to the PLC controller 84 through a digital-to-analog converter, the PLC controller 84 controls the first electric proportional valve 10 to further control the flow, and after the second flow meter inputs the monitored flow data signal to the PLC controller 84 through a digital-to-analog converter, the PLC controller 84 controls the second electric proportional valve 18 to further control the flow, and after the third flow meter 55 inputs the monitored flow data signal to the PLC controller 84 through a digital-to-analog converter, the PLC controller 84 controls the third electric proportional valve 58 to further control the flow, and a fourth flow meter is arranged in the foam delivery pipe 14 to monitor the flow in the foam delivery pipe 14, and after the fourth flow meter inputs the monitored flow data signal to the PLC controller 84 through a digital-to-analog converter, the PLC controller 84 controls the fourth electric proportional valve 57 to further control the flow. The gas cylinder 4 is provided with a first pressure gauge 60, a second pressure gauge 59 is provided between the external gas source and the gas delivery pipe 7, a third pressure gauge is provided between the foam generator 53 and the gas delivery pipe 7, and a fourth pressure gauge 50 is provided on the foam delivery pipe 14. After the first pressure gauge 60, the second pressure gauge 59, the third pressure gauge, and the fourth pressure gauge 50 input the monitored pressure data signal to the PLC controller 84 through the digital-to-analog converter, when the pressure is too high, the PLC controller 84 controls the pressure relief valve 61 to open and release the pressure to reduce the pressure. The PLC controller 84 is also electrically connected to the first solenoid valve 56, the second solenoid valve, and the third solenoid valve, so as to control whether to use the inert gas in the gas cylinder 4 or the external gas source, control the mixing of the foam stock solution and water, and control the mixing of the inert gas with the foam stock solution and water.

[0034] An emergency start button 1, an emergency stop button 2 and a status indicator light 3 are arranged on the shell. The status indicator light 3 has normal, fault, power and start states, and can be used to display the current state of the fire extinguisher. The emergency start button 1 is used to emergency start the protective device, and the emergency stop button 2 is used to emergency stop the protective device.

[0035] Although the present invention is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person skilled in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person skilled in the art who is familiar with the present technical field may easily think of changes or substitutions within the technical scope disclosed in the present invention, and these shall be within the scope of protection of the present invention.

Claims

1. A thermal runaway protection device for a battery in an energy storage power station, comprising a housing, characterized in that: Also includes: A foam stock liquid tank, wherein the foam stock liquid tank is connected to a stock liquid pump, a first electric proportional valve, a first air permeable valve and a first liquid level meter, the first electric proportional valve is connected to a stock liquid delivery pipe, the stock liquid delivery pipe is connected to a stock liquid pump and a first flow meter, and the stock liquid delivery pipe is connected to a first one-way valve; A water tank, the water tank is connected to a water pump, a second electric proportional valve, a second air-permeable valve and a second liquid level meter, the second electric proportional valve is connected to a water pipe, the water pipe is connected to a second flow meter, the water pipe is connected to a second one-way valve, and the water tank is fixedly connected to the foam stock liquid tank; A gas cylinder, wherein the gas cylinder is connected to a third electric proportional valve, the third electric proportional valve is connected to an air delivery pipe, the air delivery pipe is connected to a pumping bin, a first solenoid valve is arranged between the air delivery pipe and the pumping bin, the pumping bin is connected to the raw liquid delivery pipe and the water delivery pipe, the air delivery pipe is connected to a first air pump, the first air pump can be communicated with the gas cylinder, the air delivery pipe is also connected to a second air pump connected to an external air source, and the second air pump is connected to a second solenoid valve; A foam generator, the foam generator is connected to the pumping bin, the foam generator is also connected to the air supply pipe, a third solenoid valve is provided between the foam generator and the air supply pipe, the foam generator is connected to a foam delivery pipe, the foam delivery pipe is connected to a liquid outlet, the liquid outlet is also connected to a fire water pipeline, the fire water pipeline is connected to the foam delivery pipe, the fire water pipeline is provided with a fourth one-way valve, and the foam delivery pipe is also provided with a fourth electric proportional valve; A heating device, the heating device is fixedly arranged on the wall of the water tank; A ventilation device is fixed to the shell.

2. A thermal runaway protection device for batteries in an energy storage power station as claimed in claim 1, characterized in that: The air supply pipe is connected with a pressure relief valve.

3. The thermal runaway protection device for batteries in an energy storage power station according to claim 1, characterized in that: The pumping bin is connected with a tee, and the tee is connected with a water delivery pipe and a raw liquid delivery pipe.

4. The thermal runaway protection device for a battery in an energy storage power station according to claim 1, characterized in that: The fire-fighting water pipeline is provided with a filter.

5. The thermal runaway protection device for batteries in an energy storage power station according to claim 1, characterized in that: The invention comprises a UPS power supply for backup power supply, wherein the UPS is fixed to a fixing plate, the UPS power supply is provided with a charging port, and the fixing plate is fixed to the bottom of a shell.

6. The thermal runaway protection device for batteries in an energy storage power station according to claim 1, characterized in that: The foam stock liquid tank is provided with a first manual valve.

7. The thermal runaway protection device for batteries in an energy storage power station according to claim 1, characterized in that: The water tank is provided with a second manual valve.

8. The thermal runaway protection device for batteries in an energy storage power station according to claim 1, characterized in that: The heating device comprises a heating pipe, a heating pipe groove is fixedly connected to the peripheral wall of the water tank, the heating pipe is inserted into the heating pipe groove, the heating pipe groove is bolted with a limiting cap, and the limiting cap is provided with a wire groove opened inward from the edge for the heating wire to pass through.

9. The thermal runaway protection device for batteries in an energy storage power station as claimed in claim 2, characterized in that: The gas cylinder is provided with a first pressure gauge, a second pressure gauge is provided between the external gas source and the gas supply pipe, and a third pressure gauge is provided between the foam generator and the gas supply pipe.

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