Multi-fire-extinguishing-agent asynchronous-action fire extinguishing system and method for lithium ion battery energy storage power station

Abstract

The invention discloses a multi-fire-extinguishing-agent asynchronous action fire extinguishing system and method for a lithium ion battery energy storage power station. The system comprises a general control display, an abnormal temperature extinguishing unit, a combustible gas concentration dilution and explosion suppression unit and an open fire or dense smoke extinguishing unit. The fire occurrence stage of the lithium ion battery of the energy storage power station comprises the following steps: 1, cooling by adopting liquid nitrogen and perfluorohexanone; secondly, suffocation explosion suppression is conducted through a halide fire extinguishing agent; and thirdly, a high-pressure water mist device and a foam fire extinguishing device are adopted for extinguishing. The fire process of the container type lithium iron phosphate battery energy storage power station is divided into three stages, a multi-fire-extinguishing-agent asynchronous action fire extinguishing system is adopted, the fire occurrence and development of the lithium ion battery for energy storage can be quickly responded, and the fire development of the lithium ion battery for energy storage is controlled in the initial stage; and large accident consequences caused by thermal runaway of the lithium ion battery or generation of flammable and explosive gas are avoided.

Description

Technical Field

[0001] The present invention belongs to the field of new energy technology, and in particular relates to a multi-fire extinguishing agent asynchronous action fire extinguishing system and method for a lithium-ion battery energy storage power station. Background Art

[0002] With the development and progress of science and technology in my country, the new energy industry has become a future development trend. Lithium batteries are distinguished by different cathode materials. Among them, lithium iron phosphate batteries have attracted much attention due to their long cycle life, low cost and high safety. They are an important research direction for the future development of lithium batteries. However, lithium battery fires caused by internal short circuits and thermal runaway caused by mechanical abuse, electrical abuse and thermal abuse occur from time to time. Accidents that cause large losses because the fire is difficult to control when the lithium battery fire is discovered are not uncommon. These factors have seriously affected the safety and reliability of lithium battery equipment.

[0003] At present, most container-type energy storage power stations are equipped with fire alarm devices, temperature sensors or video smoke alarms. When the smoke concentration in the air is high or the video detects smoke, the alarm is controlled to sound an alarm to remind the staff to extinguish the fire. However, the alarm time of these two alarm technologies is close to the time of fire occurrence, leaving little time for emergency response. Once the fire spreads, it is difficult to put out the fire in time. Therefore, it is necessary to further refine the development stage of lithium battery fire and take the concentration of lithium battery combustible gas into consideration.

[0004] Therefore, how to provide a multi-fire extinguishing agent phased firefighting method that can monitor fire conditions, control fire conditions under certain conditions, and prevent sudden and random fires from causing great harm to lithium battery components is a technical problem that needs to be solved. Summary of the invention

[0005] In order to solve the deficiencies in the prior art, the present invention provides a multi-fire extinguishing agent asynchronous fire extinguishing system and method for a wired lithium-ion battery energy storage power station. The system adopts a multi-fire extinguishing agent phased fire fighting method and system, which can monitor the fire occurrence and development trend in real time and effectively extinguish the fire, which is safe and reliable and greatly reduces losses.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: A lithium-ion battery energy storage power station multi-extinguishing agent asynchronous action fire extinguishing system, including a master control display, an abnormal temperature extinguishing unit, a combustible gas concentration dilution and explosion suppression unit, and an open fire or thick smoke extinguishing unit; The master control display is an integrated control center, which is used to collect temperature, combustible gas concentration and video image data, process and feedback, and control the linkage of each unit; The abnormal temperature firefighting unit includes an infrared thermal imaging camera, an infrared temperature sensor, an abnormal temperature query module and a liquid nitrogen-perfluorohexanone injection device. The signal output end of the infrared thermal imaging camera is connected to the signal input end of the master control display. The infrared temperature sensor is arranged on the lithium battery assembly in the lithium-ion battery energy storage power station. The master control display is connected to the infrared temperature sensor through a temperature feedback control circuit. The abnormal temperature query module and the master control display are connected and arranged as one body. The combustible gas concentration dilution and explosion suppression unit includes a combustible gas concentration detection instrument, a combustible gas concentration detection channel and a combustible gas concentration parameter query module. The inlet end of the combustible gas concentration detection channel is adjacent to the lithium battery assembly, and the outlet end of the combustible gas concentration detection channel is connected to the combustible gas concentration detection instrument. The signal output end of the combustible gas concentration detection instrument is connected to the signal input end of the master control display through a combustible gas concentration feedback control circuit. The signal input end of the combustible gas concentration detection instrument is connected to the signal output end of the master control display through a linkage circuit. The combustible gas concentration parameter query module is connected to the master control display and is integrated; The fire fighting unit for open flames or thick smoke includes a video image monitoring device and a high-pressure fine water mist-foam injection device. The video image monitoring device is installed at the corner of the container in the lithium-ion battery energy storage power station, which is conducive to comprehensive monitoring of smoke or flame conditions. The high-pressure fine water mist-foam injection device is installed directly above the lithium battery assembly. When thick smoke or open flames are generated, it can respond quickly to extinguish the fire. The master control display receives and processes the data transmitted by the video monitoring device through the video transmission line.

[0007] The infrared thermal imaging camera includes an infrared optical system, an infrared detector and an algorithm platform. The infrared thermal imaging camera is used to detect temperature changes in the lithium battery component area and real-time temperature data. The video or image first passes through the infrared optical system and then is transmitted to the algorithm platform through the infrared detector. When the video information obtained by the algorithm platform exceeds the set temperature or temperature rise rate change threshold after comparison, the signal is sent to the master control display through the temperature feedback control circuit, and the master control display automatically starts the infrared temperature sensor at the location of the area.

[0008] The infrared temperature sensor includes a shell, a window is provided on one side of the shell, a pin is provided on the other side of the shell, and a shading sheet, a thermoelectric element, a field effect tube and a support ring are provided inside the shell. The infrared temperature sensor is used to monitor the temperature value of a local position of the lithium battery assembly in real time; the infrared radiation of the lithium battery assembly passes through the window, passes through the shading sheet, is received by the thermoelectric element (photodiode) and converted into an electrical signal, and the received signal is processed by the field effect tube (signal processing circuit), and finally an electrical signal related to the temperature of the lithium battery assembly is output through the pin.

[0009] The abnormal temperature query module includes an abnormal temperature positioning module, an infrared thermal imaging camera monitoring temperature value or temperature rise rate module, an infrared temperature sensor starting module and an infrared temperature sensor monitoring temperature value or temperature rise rate module; the touch buttons of the abnormal temperature positioning module, the infrared thermal imaging camera monitoring temperature value or temperature rise rate module, the infrared temperature sensor starting module and the infrared temperature sensor monitoring temperature value or temperature rise rate module are operated to display the video image of the abnormal temperature area position and the abnormal temperature positioning on the main control display, obtain the temperature value and temperature rise rate change of the lithium battery component displayed by the real-time infrared thermal imaging camera, manually start the infrared temperature sensor without going through the temperature feedback control circuit, and the infrared temperature sensor measures the change data of the temperature value and temperature rise rate about the area position more accurately.

[0010] When the infrared temperature sensor detects that the temperature value or the temperature rise rate exceeds the set threshold, the signal is transmitted to the master control display via the temperature feedback control circuit, and the master control display starts the combustible gas concentration detection instrument through the linkage circuit control. The combustible gas generated by the lithium battery assembly is transmitted to the combustible gas concentration detection instrument through the combustible gas concentration detection channel. After the combustible gas concentration detection instrument completes the concentration detection, the various concentration parameters of the combustible gas generated by the lithium battery assembly are transmitted to the master control display through the combustible gas concentration feedback control circuit. When the combustible gas concentration generated by the lithium battery assembly exceeds the set threshold, the master control display controls the liquid nitrogen-perfluorohexanone injection device to dilute and suppress the combustible gas; the touch buttons of the combustible gas concentration parameter query module are manipulated to display the various concentration parameters of the combustible gas of the lithium battery assembly on the master control display.

[0011] The video image monitoring device includes a video monitoring camera module for real-time monitoring of open flames or thick smoke and a smoke or open flame positioning module; wherein the video image monitoring camera module for monitoring open flames or thick smoke and the open flame or thick smoke positioning module respectively display real-time video monitoring image information and video images of the location information of abnormal smoke or open flame areas on the master control display; when open flames or thick smoke appear, the master control display controls the high-pressure fine water mist-full foam spray device at that location to spray water mist for fire control.

[0012] The lithium-ion battery energy storage power station multi-fire extinguishing agent asynchronous action fire extinguishing method adopts the lithium-ion battery energy storage power station multi-fire extinguishing agent asynchronous action fire extinguishing system, including the following steps: (1) The infrared thermal imaging camera of the abnormal temperature extinguishing unit obtains the temperature change rate and real-time temperature in the area where the lithium battery assembly is located. After determining the location, the infrared temperature sensor is used to determine the more accurate temperature value and temperature change at that location; when the temperature reaches the threshold set by the infrared temperature sensor, the liquid nitrogen-perfluorohexanone injection device at that location is activated for temperature control; (2) The action signal of the liquid nitrogen-perfluorohexanone injection device is used as the start-up signal of the lithium battery combustible gas dilution and explosion suppression unit. The combustible gas concentration detection instrument detects the combustible gas released by the reaction of specific compounds in the lithium battery component. When the concentration of the specific combustible gas reaches the threshold, the master control display controls the liquid nitrogen-perfluorohexanone injection device at that position to release the halogenated fire extinguishing agent to dilute the combustible gas and suppress the explosion; (3) When open flame or thick smoke appears, the video image monitoring device of the fire fighting unit obtains real-time video image information of the area where the lithium battery assembly is located and determines the location. When open flame or thick smoke appears in the video monitoring, the high-pressure fine water mist-full foam injection device at that location is activated to control the fire.

[0013] The specific working process of the abnormal temperature extinguishing unit in step (1) is as follows: the lithium battery components are in different compartments, that is, different areas are demarcated; the infrared temperature sensor is responsible for measuring the temperature and temperature rise rate at a specific location; the infrared thermal imaging camera is responsible for monitoring whether the lithium battery panel components in the area have abnormal temperature values ​​or abnormal temperature rise rate changes; when the infrared thermal imaging camera detects that the temperature value or temperature rise rate exceeds the set threshold, the area position is locked, and the infrared temperature sensor at the position is activated through the master control display; when the infrared temperature sensor detects that the temperature value or temperature rise rate exceeds the set threshold, the liquid nitrogen-perfluorohexanone injection device at the position is activated to spray liquid nitrogen for temperature control.

[0014] The specific working process of the combustible gas concentration dilution and explosion suppression unit in step (2) is as follows: the start signal of the liquid nitrogen-perfluorohexanone injection device of the abnormal temperature fire fighting unit is used as the start signal of the combustible gas concentration detection instrument, the combustible gas is detected by the combustible gas concentration detection instrument through the combustible gas concentration detection channel, and the detected signal is transmitted to the master control display. When the combustible gas concentration reaches the set threshold value, the master control display indicates that the liquid nitrogen-perfluorohexanone injection device at this position is driven and releases the halogenated fire extinguishing agent to dilute and suppress the combustible gas.

[0015] The specific working process of the fire or smoke extinguishing unit in step (3) is as follows: the lithium battery components are placed in different compartments to define different areas; the video image monitoring device is responsible for real-time monitoring and transmission of a specific video information; the infrared temperature sensor is responsible for measuring the temperature and temperature rise rate at a specific location; the high-pressure fine water mist-foam spray device is responsible for controlling the size of the fire when an open flame or thick smoke appears, and preventing the fire from spreading further; the video image monitoring device is responsible for monitoring whether there is an open flame or thick smoke in the lithium battery panel components in the area; when the video image monitoring device detects an open flame or thick smoke, the area is locked, a signal is sent to the master control display, and the high-pressure fine water mist-foam spray device at the location is activated to spray water mist for fire control.

[0016] By adopting the above technical scheme, the working principle of the multi-fire extinguishing agent (liquid nitrogen, halide and water mist) of the present invention in different periods to extinguish lithium battery fire is as follows: the lithium battery assembly is divided into areas according to the layers, the abnormal temperature extinguishing unit uses the infrared thermal imaging camera in the area to determine the location of the abnormal temperature rise, and the infrared temperature sensor at the location of the area is activated to more accurately detect the temperature of the location. When the set threshold is reached, the alarm is triggered and the liquid nitrogen-perfluorohexanone spray device is activated to spray atomized liquid nitrogen for temperature control. The combustible gas dilution and explosion suppression unit uses the lithium battery cloud chamber to absorb the combustible gas precipitated from the lithium battery assembly, and the action stop signal of the liquid nitrogen-perfluorohexanone spray device is used as the starting signal for starting the lithium battery cloud chamber detection. After the combustible gas concentration reaches the threshold, the liquid nitrogen-perfluorohexanone spray device is activated to spray the halide fire extinguishing agent spray device for suffocation and explosion suppression. The open fire or thick smoke extinguishing unit uses a video image monitoring device to be responsible for an area. When the video image monitoring device detects the presence of smoke or open fire, the location of the area is locked, and the high-pressure fine water mist-foam spray device at the location is activated to spray water mist for fire control. The present invention can quickly and effectively put out a lithium battery fire, and remind relevant staff and emergency rescue personnel to handle it to avoid causing serious accident consequences.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a method and system for extinguishing fires in containerized lithium iron phosphate battery energy storage power stations with multiple fire extinguishing agents in different periods. The lithium battery components are divided into different areas, and the temperature distribution image of the detected area is obtained by an infrared thermal imaging camera; the temperature distribution image is processed and compared with the set threshold; when the temperature value or temperature rise rate of the area exceeds the threshold set by the infrared camera, the area is locked and the infrared temperature sensor of the area is started; the infrared temperature sensor is started to detect a more accurate temperature of the position; when the temperature value or temperature rise rate of the position exceeds the threshold set by the infrared temperature sensor, the liquid nitrogen-perfluorohexanone injection device at the position is started for temperature control; the stop signal of the liquid nitrogen-perfluorohexanone injection device is used as the start signal for the cloud chamber detection of the combustible gas concentration of the lithium battery component; when the combustible gas concentration of the lithium battery exceeds the set threshold, the halide fire extinguishing agent injection device is started for suffocation and explosion suppression; the video image monitoring camera is responsible for determining the smoke and open fire conditions in a specific area. When the video image monitoring camera detects the presence of smoke or open fire, the position of the area is locked, and the high-pressure fine water mist-foam injection device at the position is activated for fire control. The invention has a scientific principle, a high degree of intelligence, and is safe and reliable. It uses multiple fire extinguishing agents to extinguish lithium battery component fires in different periods, and uses infrared thermal imaging instruments, infrared temperature sensors, video image monitoring and other equipment to improve recognition speed and accuracy. It can achieve fixed-point fire extinguishing, improve the accuracy and efficiency of fire extinguishing, and ensure the safety of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the master control display of the present invention; Figure 3 It is a structural schematic diagram of the infrared thermal imaging video image monitoring camera of the present invention; Figure 4 It is a structural schematic diagram of the infrared temperature sensor of the present invention; Figure 5 It is the work flow chart of abnormal temperature fire fighting unit; Figure 6 It is the work flow chart of the combustible gas concentration dilution and explosion suppression unit; Figure 7 It is a workflow diagram for the fire-fighting unit when open flames or thick smoke appear. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The implementation methods of the present invention described above in conjunction with the drawings do not constitute a limitation on the scope of protection of the present invention.

[0020] like Figure 1-Figure 7 As shown, the lithium-ion battery energy storage power station multi-extinguishing agent asynchronous fire extinguishing system includes a master control display 1, an abnormal temperature extinguishing unit, a combustible gas concentration dilution and explosion suppression unit, and an open flame or thick smoke extinguishing unit.

[0021] The abnormal temperature firefighting unit includes an infrared thermal imaging camera 2, an infrared temperature sensor 3, an abnormal temperature query module and a liquid nitrogen-perfluorohexanone injection device, the liquid nitrogen-perfluorohexanone injection device includes a liquid nitrogen-perfluorohexanone tank 5 and a first nozzle 6, the signal output end of the infrared thermal imaging camera 2 is connected to the signal input end of the master control display 1, the infrared temperature sensor 3 is arranged on the lithium battery assembly 7, and the master control display 1 is connected to the infrared temperature sensor 3 through a temperature feedback control circuit 8. The abnormal temperature query module and the master control display 1 are connected and set as a whole. When the temperature or the temperature rise rate exceeds the set threshold, the first solenoid valve 9 on the liquid nitrogen-perfluorohexanone tank 5 is started, and the first nozzle 6 sprays a halogenide fire extinguishing agent through the first pipeline 41 to cool down the temperature.

[0022] The combustible gas concentration dilution and explosion suppression unit includes a combustible gas concentration detection instrument 10, a combustible gas concentration detection channel 11, and a combustible gas concentration parameter query module 12, a halogenated fire extinguishing agent tank 13, and a first nozzle 6 (shared with a liquid nitrogen-perfluorohexanone injection device). The inlet end of the combustible gas concentration detection channel 11 is adjacent to the lithium battery assembly 7, and the outlet end of the combustible gas concentration detection channel 11 is connected to the combustible gas concentration detection instrument 10. The signal output end of the combustible gas concentration detection instrument 10 is connected to the signal input end of the master control display 1 through a combustible gas concentration feedback control circuit 14, and the combustible gas concentration parameter query module 12 and the master control display 1 are connected and integrated. The liquid nitrogen-perfluorohexanone action stop signal is used as the start signal of the combustible gas concentration detection instrument 10. When any concentration of the combustible gas exceeds the set threshold, the second solenoid valve 15 on the halogenated fire extinguishing agent tank 13 is started, and the halogenated fire extinguishing agent is sprayed from the first nozzle 6 through the first pipeline 41 to suffocate and suppress the explosion.

[0023] The fire fighting unit for open fire or thick smoke includes a video image monitoring device, a high-pressure fine water mist-foam spraying device, a real-time video image information query module 17 and a smoke or open fire positioning module 18; the video image monitoring device includes a video monitoring camera 50, and the high-pressure fine water mist-foam spraying device includes a high-pressure fine water mist-foam tank 19 and a second nozzle 16; the video monitoring camera 50 obtains real-time video image information in the area where the lithium battery assembly is located and determines the location. When an open fire or thick smoke appears in the video monitoring, the video signal is transmitted through the video monitoring line 40, and the main control display 1 controls the activation of the high-pressure fine water mist-full foam spraying device at the location to control the fire situation, and the second nozzle 16 is arranged above the lithium battery assembly; when an open fire or thick smoke appears, the third solenoid valve 20 on the high-pressure fine water mist-foam tank 19 is activated, and the fire extinguishing agent is sprayed from the second nozzle 16 through the second pipeline 42 to extinguish the fire.

[0024] The infrared thermal imaging camera 2 includes an infrared optical system 21, an infrared detector 22 and an algorithm platform 23. The infrared thermal imaging video surveillance camera 2 is used to detect the temperature changes in the lithium battery assembly 7 area and real-time temperature data; the video or image first passes through the infrared optical system 21, and then is transmitted to the algorithm platform 23 through the infrared detector 22. When the video information obtained by the algorithm platform 23 exceeds the set temperature or temperature rise rate change threshold after comparison, the signal is sent to the master control display 1 through the temperature feedback control circuit 8, and the master control display 1 automatically starts the infrared temperature sensor 3 at the location of the area.

[0025] The infrared temperature sensor 3 includes a shell 24, a window 25 is provided on one side of the shell 24, a pin 26 is provided on the other side of the shell 24, and a shading sheet 27, a thermoelectric element 28, a field effect tube 29 and a support ring 30 are provided inside the shell 24. The infrared temperature sensor 3 is used to monitor the temperature value of a local position of the lithium battery assembly 7 in real time; the infrared radiation of the lithium battery assembly 7 passes through the window 25, passes through the shading sheet 27, is received by the thermoelectric element 28 (photodiode) and converted into an electrical signal, and the received signal is processed by the field effect tube 29 (signal processing circuit), and finally an electrical signal related to the temperature of the lithium battery assembly 7 is output through the pin 26.

[0026] The abnormal temperature query module includes an abnormal temperature positioning module 31, a temperature value or temperature rise rate module 32, an infrared temperature sensor starting module 33 and an infrared temperature sensor monitoring temperature value or temperature rise rate module 34; the touch buttons of the abnormal temperature positioning module 31, the temperature value or temperature rise rate module 32, the infrared temperature sensor starting module 33 and the infrared temperature sensor monitoring temperature value or temperature rise rate module 34 are controlled to display the video image of the abnormal temperature area position and the abnormal temperature positioning on the master control display 1, obtain the temperature value and temperature rise rate change of the lithium battery assembly 7 displayed by the real-time infrared thermal imaging camera 2, manually start the infrared temperature sensor 3 without going through the temperature feedback control circuit 8, and obtain more accurate temperature value and temperature rise rate measurement change data of the infrared temperature sensor 3 about the area position.

[0027] When the infrared temperature sensor 3 detects that the temperature value or the temperature rise rate exceeds the set threshold, the signal is transmitted to the master control display 1 through the temperature feedback control circuit 8. When the liquid nitrogen-perfluorohexanone fire extinguishing agent is released, its stop signal is used as the start signal for starting the combustible gas concentration detection. The master control display 1 controls the start of the combustible gas concentration detection instrument 10 through the linkage circuit 14. The lithium battery assembly 7 is transported to the combustible gas concentration detection instrument 10 through the combustible gas concentration detection channel 11. After the combustible gas concentration detection instrument 10 completes the concentration detection, the various concentration parameters of the combustible gas of the lithium battery assembly 7 are transported to the master control display 1 through the combustible gas concentration feedback control circuit 14; the touch buttons of the combustible gas concentration parameter query module 12 are controlled to display the various concentration parameters of the combustible gas of the lithium battery assembly 7 on the master control display 1.

[0028] The method for asynchronously extinguishing fire with multiple fire extinguishing agents in a lithium-ion battery energy storage power station comprises the following steps: (1) The infrared thermal imaging camera 2 of the abnormal temperature warning unit obtains the temperature change rate and real-time temperature in the area where the lithium battery assembly 7 is located, and after determining the location, uses the infrared temperature sensor 3 to determine a more accurate temperature value and temperature change at the location; when the temperature reaches the threshold set by the infrared temperature sensor 3, the first solenoid valve 9 on the liquid nitrogen-perfluorohexanone tank 5 is started, and the first nozzle 6 sprays the fire extinguishing agent through the first pipeline 41 to cool down the temperature; Figure 1 shown.

[0029] (2) The combustible gas concentration dilution and explosion suppression unit uses the liquid nitrogen-perfluorohexanone device stop signal as the start signal of the combustible gas concentration detection instrument 10. The lithium battery assembly combustible gas concentration detection instrument 10 detects the combustible gas concentration of the lithium battery assembly 7. When the combustible gas concentration reaches the threshold, the second solenoid valve 15 on the halide fire extinguishing agent tank 13 is started, and the halide fire extinguishing agent is sprayed from the first nozzle 6 through the first pipeline 41 to suffocate and suppress the explosion. Figure 2 shown.

[0030] (3) The fire fighting unit uses the video surveillance camera 50 to monitor in real time whether there is fire or smoke in the lithium battery assembly. When fire or smoke occurs, the third electromagnetic 20 on the high-pressure fine water mist-foam tank 19 is activated, and the fire extinguishing agent is sprayed from the second nozzle 16 through the second pipeline 42 to extinguish the fire. Figure 3 shown.

[0031] The specific firefighting unit based on abnormal temperature in step (1) is: YW101, divide the lithium battery assembly 7 into different areas; YW102, infrared thermal imaging camera 2 detects whether the temperature value and temperature rise rate in the area are abnormal; YW103, when the temperature value or temperature rise rate at a certain location in the area exceeds the set threshold, the location is locked; YW104, start the infrared temperature sensor 3 at this position to detect temperature changes more accurately; YW105. When the temperature value or the temperature rise rate exceeds the set threshold of the infrared temperature sensor 3, the liquid nitrogen-perfluorohexanone device is started for cooling.

[0032] The specific steps of the combustible gas concentration dilution and explosion suppression unit in step (2) are: K101, using the liquid nitrogen-perfluorohexanone action stop signal as a start signal for starting the lithium battery assembly combustible gas concentration detection instrument 10; K102, start the combustible gas concentration detection instrument 10 to detect the combustible gas concentration; K103, detect the concentration components of various combustible gases in lithium battery components; K104. When the concentration of combustible gas reaches the set threshold, the halide fire extinguishing agent tank 13 is activated to suffocate and suppress explosion.

[0033] In step (3), the fire fighting unit based on the occurrence of open fire or thick smoke is specifically: S101, the video surveillance camera 50 monitors the lithium battery components in the area in real time; S102. Open flames or thick smoke are found; S103, determining the position; S104. Activate the high-pressure water mist-foam fire extinguishing device at the location to extinguish the fire.

[0034] The above embodiments illustrate the basic principles and features of the present invention, but the above only illustrates the preferred embodiments of the present invention and is not limited to the embodiments. Under the inspiration of this patent, a person skilled in the art can make many forms of deformation and improvement without departing from the scope of protection of the present invention and the claims, which are all within the protection scope of the present invention. Therefore, the patent and protection scope of the present invention shall be subject to the attached claims.

Claims

1. Lithium-ion battery energy storage power station multi-fire extinguishing agent asynchronous action fire extinguishing system, characterized by: Including master control display, abnormal temperature extinguishing unit, combustible gas concentration dilution and explosion suppression unit, open fire or thick smoke extinguishing unit; The master control display is an integrated control center, which is used to collect temperature, combustible gas concentration and video image data, process and feedback, and control the linkage of each unit; The abnormal temperature firefighting unit includes an infrared thermal imaging camera, an infrared temperature sensor, an abnormal temperature query module and a liquid nitrogen-perfluorohexanone injection device. The signal output end of the infrared thermal imaging camera is connected to the signal input end of the master control display. The infrared temperature sensor is arranged on the lithium battery assembly in the lithium-ion battery energy storage power station. The master control display is connected to the infrared temperature sensor through a temperature feedback control circuit. The abnormal temperature query module and the master control display are connected and arranged as one body. The combustible gas concentration dilution and explosion suppression unit includes a combustible gas concentration detection instrument, a combustible gas concentration detection channel and a combustible gas concentration parameter query module. The inlet end of the combustible gas concentration detection channel is adjacent to the lithium battery assembly, and the outlet end of the combustible gas concentration detection channel is connected to the combustible gas concentration detection instrument. The signal output end of the combustible gas concentration detection instrument is connected to the signal input end of the master control display through a combustible gas concentration feedback control circuit. The signal input end of the combustible gas concentration detection instrument is connected to the signal output end of the master control display through a linkage circuit. The combustible gas concentration parameter query module is connected to the master control display and is integrated; The fire fighting unit for open flames or thick smoke includes a video image monitoring device and a high-pressure fine water mist-foam injection device. The video image monitoring device is installed at the corner of the container in the lithium-ion battery energy storage power station, which is conducive to comprehensive monitoring of smoke or flame conditions. The high-pressure fine water mist-foam injection device is installed directly above the lithium battery assembly. When thick smoke or open flames are generated, it can respond quickly to extinguish the fire. The master control display receives and processes the data transmitted by the video monitoring device through the video transmission line.

2. The lithium-ion battery energy storage power station multi-fire extinguishing agent asynchronous action fire extinguishing system according to claim 1 is characterized in that: The infrared thermal imaging camera includes an infrared optical system, an infrared detector and an algorithm platform. The infrared thermal imaging camera is used to detect temperature changes in the lithium battery component area and real-time temperature data. The video or image first passes through the infrared optical system and then is transmitted to the algorithm platform through the infrared detector. When the video information obtained by the algorithm platform exceeds the set temperature or temperature rise rate change threshold after comparison, the signal is sent to the master control display through the temperature feedback control circuit, and the master control display automatically starts the infrared temperature sensor at the location of the area.

3. The lithium-ion battery energy storage power station multi-fire extinguishing agent asynchronous action fire extinguishing system according to claim 2 is characterized in that: The infrared temperature sensor includes a shell, a window is provided on one side of the shell, a pin is provided on the other side of the shell, and a shading sheet, a thermoelectric element, a field effect tube and a support ring are provided inside the shell. The infrared temperature sensor is used to monitor the temperature value of a local position of the lithium battery assembly in real time; the infrared radiation of the lithium battery assembly passes through the window, passes through the shading sheet, is received by the thermoelectric element (photodiode) and converted into an electrical signal, and the received signal is processed by the field effect tube (signal processing circuit), and finally an electrical signal related to the temperature of the lithium battery assembly is output through the pin.

4. The lithium-ion battery energy storage power station multi-fire extinguishing agent asynchronous action fire extinguishing system according to claim 3 is characterized by: The abnormal temperature query module includes an abnormal temperature positioning module, an infrared thermal imaging camera monitoring temperature value or temperature rise rate module, an infrared temperature sensor starting module and an infrared temperature sensor monitoring temperature value or temperature rise rate module; the touch buttons of the abnormal temperature positioning module, the infrared thermal imaging camera monitoring temperature value or temperature rise rate module, the infrared temperature sensor starting module and the infrared temperature sensor monitoring temperature value or temperature rise rate module are operated to display the video image of the abnormal temperature area position and the abnormal temperature positioning on the main control display, obtain the temperature value and temperature rise rate change of the lithium battery component displayed by the real-time infrared thermal imaging camera, manually start the infrared temperature sensor without going through the temperature feedback control circuit, and the infrared temperature sensor measures the change data of the temperature value and temperature rise rate about the area position more accurately.

5. The lithium-ion battery energy storage power station multi-fire extinguishing agent asynchronous action fire extinguishing system according to claim 4 is characterized in that: When the infrared temperature sensor detects that the temperature value or the temperature rise rate exceeds the set threshold, the signal is transmitted to the master control display via the temperature feedback control circuit, and the master control display starts the combustible gas concentration detection instrument through the linkage circuit control. The combustible gas generated by the lithium battery assembly is transmitted to the combustible gas concentration detection instrument through the combustible gas concentration detection channel. After the combustible gas concentration detection instrument completes the concentration detection, the various concentration parameters of the combustible gas generated by the lithium battery assembly are transmitted to the master control display through the combustible gas concentration feedback control circuit. When the combustible gas concentration generated by the lithium battery assembly exceeds the set threshold, the master control display controls the liquid nitrogen-perfluorohexanone injection device to dilute and suppress the combustible gas; the touch buttons of the combustible gas concentration parameter query module are manipulated to display the various concentration parameters of the combustible gas of the lithium battery assembly on the master control display.

6. The lithium-ion battery energy storage power station multi-fire extinguishing agent asynchronous action fire extinguishing system according to claim 5 is characterized in that: The video image monitoring device includes a video monitoring camera module for real-time monitoring of open flames or thick smoke and a smoke or open flame positioning module; wherein the video image monitoring camera module for monitoring open flames or thick smoke and the open flame or thick smoke positioning module respectively display real-time video monitoring image information and video images of the location information of abnormal smoke or open flame areas on the master control display; when open flames or thick smoke appear, the master control display controls the high-pressure fine water mist-full foam spray device at that location to spray water mist for fire control.

7. A method for asynchronously acting multiple fire extinguishing agents in a lithium-ion battery energy storage power station, using the lithium-ion battery energy storage power station asynchronously acting multiple fire extinguishing agents fire extinguishing system according to claim 6, characterized in that: The following steps are involved: (1) The infrared thermal imaging camera of the abnormal temperature extinguishing unit obtains the temperature change rate and real-time temperature in the area where the lithium battery assembly is located. After determining the location, the infrared temperature sensor is used to determine the more accurate temperature value and temperature change at that location; when the temperature reaches the threshold set by the infrared temperature sensor, the liquid nitrogen-perfluorohexanone injection device at that location is activated for temperature control; (2) The action signal of the liquid nitrogen-perfluorohexanone injection device is used as the start-up signal of the lithium battery combustible gas dilution and explosion suppression unit. The combustible gas concentration detection instrument detects the combustible gas released by the reaction of specific compounds in the lithium battery component. When the concentration of the specific combustible gas reaches the threshold, the master control display controls the liquid nitrogen-perfluorohexanone injection device at that position to release the halogenated fire extinguishing agent to dilute the combustible gas and suppress the explosion; (3) When open flame or thick smoke appears, the video image monitoring device of the fire fighting unit obtains real-time video image information of the area where the lithium battery assembly is located and determines the location. When open flame or thick smoke appears in the video monitoring, the high-pressure fine water mist-full foam injection device at that location is activated to control the fire.

8. The method for asynchronously extinguishing fires by using multiple fire extinguishing agents in a lithium-ion battery energy storage power station according to claim 7, characterized in that: The specific working process of the abnormal temperature extinguishing unit in step (1) is as follows: the lithium battery components are divided into different areas in different compartments; the infrared temperature sensor is responsible for measuring the temperature and temperature rise rate of the specific location; the infrared thermal imaging camera is responsible for monitoring whether there is an abnormal temperature value or abnormal temperature rise rate change of the lithium battery panel components in the area; when the infrared thermal imaging camera detects that the temperature value or temperature rise rate exceeds the set threshold, the area position is locked, and the infrared temperature sensor at the location is activated through the master control display; When the infrared temperature sensor detects that the temperature value or the temperature rise rate exceeds the set threshold, the liquid nitrogen-perfluorohexanone injection device at that position is started to spray liquid nitrogen for temperature control.

9. The method for asynchronously extinguishing fires by using multiple fire extinguishing agents in a lithium-ion battery energy storage power station according to claim 7, characterized in that: The specific working process of the combustible gas concentration dilution and explosion suppression unit in step (2) is as follows: the start signal of the liquid nitrogen-perfluorohexanone injection device of the abnormal temperature fire fighting unit is used as the start signal of the combustible gas concentration detection instrument, the combustible gas is detected by the combustible gas concentration detection instrument through the combustible gas concentration detection channel, and the detected signal is transmitted to the master control display. When the combustible gas concentration reaches the set threshold value, the master control display indicates that the liquid nitrogen-perfluorohexanone injection device at this position is driven and releases the halogenated fire extinguishing agent to dilute and suppress the combustible gas.

10. The method for asynchronously extinguishing fires by using multiple fire extinguishing agents in a lithium-ion battery energy storage power station according to claim 7, characterized in that: The specific working process of the fire or smoke extinguishing unit in step (3) is as follows: the lithium battery components are placed in different compartments to define different areas; the video image monitoring device is responsible for real-time monitoring and transmission of a specific video information; the infrared temperature sensor is responsible for measuring the temperature and temperature rise rate at a specific location; the high-pressure fine water mist-foam spray device is responsible for controlling the size of the fire when an open flame or thick smoke appears, and preventing the fire from spreading further; the video image monitoring device is responsible for monitoring whether there is an open flame or thick smoke in the lithium battery panel components in the area; when the video image monitoring device detects an open flame or thick smoke, the area is locked, a signal is sent to the master control display, and the high-pressure fine water mist-foam spray device at the location is activated to spray water mist for fire control.

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