Gas-water mixed fire extinguishing system for fire suppression of battery pack

Abstract

The invention discloses a gas-water mixed fire extinguishing system for battery pack fire suppression, which comprises a battery rack and a fire extinguishing system, the battery rack is internally provided with mounting grooves arranged up and down, and each mounting groove is internally provided with a battery pack; the fire extinguishing system comprises a gas storage unit, a water source pipe and a double-medium conveying pipeline arranged above the battery rack, the gas storage unit and the water source pipe are both communicated with the double-medium conveying pipeline, and first electromagnetic valves are fixedly installed at the communicating positions of the gas storage unit and the double-medium conveying pipeline and the communicating positions of the water source pipe and the double-medium conveying pipeline. A branch pipe used for shunting is fixedly installed on the double-medium conveying pipeline, and the other end of the branch pipe is fixedly connected with a guide pipe communicated with the branch pipe. According to the method, double media are adopted for cooperative fire extinguishing, the reburning risk thermal runaway restraining efficiency is improved by 65%, meanwhile, the influence on other battery packs is greatly reduced through fixed-point and fixed-position fire fighting work, and subsequent normal use of an electric energy system is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of battery safety, and more specifically, to an air-water mixed fire-fighting system for suppressing battery pack fires. Background Art

[0002] Currently, gas fire-fighting systems such as perfluoromethylcyclohexane are mainly used in energy storage power stations, but there are the following technical defects: 1. There is a risk of re-ignition after extinguishing with a single medium, and there is a lack of continuous cooling ability; 2. Traditional water spray systems cannot accurately reach the thermally out-of-control battery pack; Existing systems lack disassembly means and cannot block the thermally out-of-control chain reaction. Summary of the Invention

[0003] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide an air-water mixed fire-fighting system for suppressing battery pack fires.

[0004] To solve the above problems, the present invention adopts the following technical solutions; An air-water mixed fire-fighting system for suppressing battery pack fires, including a battery rack and a fire-fighting system. The inside of the battery rack is provided with installation slots arranged vertically. Each installation slot is internally installed with a battery pack. The fire-fighting system includes a gas storage unit, a water source pipe, and a dual-medium delivery pipe arranged above the battery rack. The gas storage unit and the water source pipe are both connected to the dual-medium delivery pipe. First solenoid valves are fixedly installed at the connection points of the gas storage unit and the water source pipe with the dual-medium delivery pipe. The dual-medium delivery pipe is fixedly installed with branch pipes for flow distribution. The other end of the branch pipe is fixedly connected to a conduit communicating with it. The other end of the conduit extends downward along the side of the battery rack. The conduit is fixedly installed with air-water dual-purpose spray nozzles arranged at equal distances. A second solenoid valve is fixedly installed at the connection point of the air-water dual-purpose spray nozzle and the conduit. Each air-water dual-purpose spray nozzle corresponds to an installation slot area where a battery pack is installed. A PLC controller is fixedly installed on the gas storage unit. The first solenoid valve and the second solenoid valve are both electrically connected to the PLC controller.

[0005] As a further description of the above technical solution: The gas storage unit is a perfluoromethylcyclohexane high-pressure tank.

[0006] As a further description of the above technical solution: A temperature sensor is fixedly installed in each installation slot area where a battery pack is installed. The temperature sensor is electrically connected to the PLC controller.

[0007] As a further description of the above technical solution: The bottom of the battery pack is rotatably installed with evenly distributed pulleys, which are made of high-carbon chromium steel, and the bottom of the battery pack is connected to the battery rack through the pulleys.

[0008] As a further description of the above technical solution: It further includes an unpacking trolley, and a platform for receiving the battery pack is arranged on the unpacking trolley.

[0009] As a further description of the above technical solution: A handle for pulling and installing is arranged on the front of the battery pack.

[0010] As a further description of the above technical solution: The opening and closing modes of the first solenoid valve and the second solenoid valve controlled by the PLC controller are divided into the following scenarios: When the temperature in the installation slot area where the battery pack is installed rises to the ignition temperature value, the first solenoid valve at the connection of the gas storage unit and the dual-medium delivery pipeline is opened, and the corresponding second solenoid valve is opened to deliver perfluorocyclohexanone to the installation slot area where the target battery pack is installed through the pipeline; When the temperature in the installation slot area where the battery pack is installed rises above the ignition temperature value, the first solenoid valves at the connections of the gas storage unit and the water source pipe and the dual-medium delivery pipeline are opened at intervals, and the corresponding second solenoid valves are opened until the temperature in the installation slot area is within the normal value.

[0011] Compared with the prior art, the advantages of the present invention are as follows: (1) In this solution, dual-medium collaborative fire extinguishing is adopted, the risk of re-ignition and the thermal runaway suppression efficiency are increased by 65%. At the same time, the fixed-point and positioning fire-fighting work greatly reduces the impact on other battery packs, ensuring the subsequent normal use of the power system.

[0012] (2) In this solution, when the fire of the battery pack cannot be controlled, the battery pack is promptly unloaded from the battery rack to avoid the fire from overly affecting other battery packs. At the same time, it is convenient to normally replace and maintain the battery pack, reducing the maintenance cost and improving the maintenance convenience. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of the fire-fighting system of the present invention; Figure 2 It is a schematic structural diagram of the unpacking trolley of the present invention; Figure 3 It is a schematic structural diagram of the battery pack of the present invention; Figure 4 It is a schematic inverted structure diagram of the present invention; Figure 5 For the present invention Figure 4 The enlarged structural diagram of part A in.

[0014] Description of reference numerals in the figure: 1. Battery rack; 2. Fire protection system; 21. Gas storage unit; 22. Water source pipe; 23. Dual-medium conveying pipeline; 24. First solenoid valve; 25. Branch pipe; 26. Conduit; 27. Gas-water dual-purpose sprinkler; 28. Second solenoid valve; 29. PLC controller; 3. Battery pack; 31. Pulley; 4. Temperature sensor; 5. Unloading trolley; 6. Handle. Specific implementation mode

[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; Please refer to Figures 1-5 , the present invention provides Embodiment 1: A gas-water mixed fire protection system for suppressing battery pack fires, including a battery rack 1 and a fire protection system 2. Installation grooves arranged up and down are provided inside the battery rack 1, and a battery pack 3 is installed inside each installation groove. The fire protection system 2 includes a gas storage unit 21, a water source pipe 22, and a dual-medium conveying pipeline 23 arranged above the battery rack 1. The gas storage unit 21 and the water source pipe 22 are both connected to the dual-medium conveying pipeline 23. First solenoid valves 24 are fixedly installed at the connection points of the gas storage unit 21 and the water source pipe 22 with the dual-medium conveying pipeline 23. A branch pipe 25 for shunting is fixedly installed on the dual-medium conveying pipeline 23. The other end of the branch pipe 25 is fixedly connected to a conduit 26 communicating therewith. The other end of the conduit 26 extends downward along the side of the battery rack 1. Gas-water dual-purpose sprinklers 27 arranged at equal distances are fixedly installed on the conduit 26. Second solenoid valves 28 are fixedly installed at the connection points of the gas-water dual-purpose sprinklers 27 and the conduit 26. Each gas-water dual-purpose sprinkler 27 corresponds to an installation groove area where a battery pack 3 is installed. A PLC controller 29 is fixedly installed on the gas storage unit 21. The first solenoid valve 24 and the second solenoid valve 28 are both electrically connected to the PLC controller 29; the gas storage unit 21 is a perfluoroketone high-pressure tank; The dual-medium conveying pipeline 23 provides a conveying pipeline. Dual-medium fire extinguishing agents are provided through the gas storage unit 21 and the water source pipe 22, and then the fire extinguishing agents are conveyed to the installation groove area where the target battery pack 3 is located through the branch pipe 25, the conduit 26, and the gas-water dual-purpose sprinkler 27, so as to achieve the fire protection effect. The dual-medium cooperative fire extinguishing can increase the re-ignition risk and the thermal runaway suppression efficiency by 65%. At the same time, the fixed-point and positioning fire protection work greatly reduces the impact on other battery packs 3 and ensures the subsequent normal use of the power system; A temperature sensor 4 is fixedly installed in each installation groove area where a battery pack 3 is installed. The temperature sensor 4 is electrically connected to the PLC controller 29; The temperature inside each installation slot in the battery rack 1 can be monitored through the temperature sensor 4, so as to obtain whether there are fire hazards in the battery pack 3 in the installation slot, and conveniently control the fire-fighting method of the fire-fighting system according to the temperature. The PLC controller 29 is used for automatic control, reducing manual monitoring, thereby reducing the maintenance cost and ensuring the real-time and timeliness of the fire-fighting function.

[0016] The opening and closing modes of the first solenoid valve 24 and the second solenoid valve 28 controlled by the PLC controller 29 are divided into the following scenarios: When the temperature in the installation slot area where the battery pack 3 is installed rises to the ignition temperature value, the first solenoid valve 24 at the connection of the gas storage unit 21 and the dual-medium transmission pipeline 23 is opened, and the corresponding second solenoid valve 28 is opened to transport perfluoroketone to the installation slot area where the target battery pack 3 is installed through the pipeline; before and at the initial stage of the battery pack 3 catching fire, perfluoroketone is transported to the installation slot area where the target battery pack 3 is located, reducing or completely replacing oxygen, reducing the inducement and environment for open fire combustion, and achieving the fire-fighting purpose; When the temperature in the installation slot area where the battery pack 3 is installed rises above the ignition temperature value, the first solenoid valve 24 at the connection of the gas storage unit 21 and the water source pipe 22 and the dual-medium transmission pipeline 23 is intermittently opened, and the corresponding second solenoid valve 28 is opened until the temperature in the installation slot area is within the normal value; when the fire cannot be controlled solely by perfluoroketone, the two first solenoid valves 24 are intermittently opened in rotation, so that perfluoroketone gas and water mist are filled into the installation slot area where the target battery pack 3 is located. Among them, the perfluoroketone gas is heavier than air and sinks, enabling it to quickly fill the bottom of the enclosed space, wrap the battery module or electronic equipment, isolate oxygen and suppress the flame, and the water mist suspends or evaporates to absorb heat. The two form a three-dimensional fire-fighting layer and play a role in reducing the temperature of the battery pack, with better fire-fighting effect and effectively preventing re-ignition. Please refer to Figures 2-5 , on the basis of Embodiment 1, the present invention also provides Embodiment 2: Uniformly distributed pulleys 31 are rotatably installed at the bottom of the battery pack 3. The pulleys 31 are made of high-carbon chromium steel, and the bottom of the battery pack 3 is connected to the battery rack 1 through the pulleys 31; It further includes an unpacking trolley 5, and a platform for receiving the battery pack 3 is arranged on the unpacking trolley 5; By setting the pulleys 31, the bottom of the battery pack 3 can slide on the inner bottom wall of the installation slot. When the upper interface of the battery pack 3 falls off, the battery pack 3 can be directly pulled out from the battery rack 1 in a pull-out manner, and it is convenient to turnover through the unpacking trolley 5. By adjusting the height of the platform on the unpacking trolley 5, it is convenient to receive the pulled-out battery pack 3. When the fire of the battery pack cannot be controlled, the battery pack 3 is timely unloaded from the battery rack 1, avoiding the fire from overly affecting other battery packs 3, and at the same time facilitating the normal replacement and maintenance of the battery pack 3, reducing the maintenance cost and improving the maintenance convenience.

[0017] A handle 6 for pulling and installing is provided on the front of the battery pack 3; through the handle 6, it is convenient for maintenance personnel to pull out, install or remove the battery pack 3 in the battery rack 1. As described above, it is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and its improved concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A gas-water mixed fire suppression system for a battery pack, comprising a battery rack (1) and a fire suppression system (2), wherein the interior of the battery rack (1) is provided with mounting grooves arranged vertically, and each mounting groove is internally provided with a battery pack (3), characterized in that: The fire protection system (2) includes a gas storage unit (21), a water source pipe (22), and a dual-medium delivery pipe (23) disposed above the battery rack (1). The gas storage unit (21) and the water source pipe (22) are both connected to the dual-medium delivery pipe (23). First solenoid valves (24) are fixedly installed at the connection points of the gas storage unit (21) and the water source pipe (22) with the dual-medium delivery pipe (23). A branch pipe (25) for splitting is fixedly installed on the dual-medium delivery pipe (23). The other end of the branch pipe (25) is fixedly connected to a conduit (26) communicating therewith. The other end of the conduit (26) extends downward along the side of the battery rack (1). Gas-water dual-purpose spray nozzles (27) arranged at equal distances are fixedly installed on the conduit (26). Second solenoid valves (28) are fixedly installed at the connection points of the gas-water dual-purpose spray nozzles (27) and the conduit (26). Each gas-water dual-purpose spray nozzle (27) corresponds to an installation slot area where a battery pack (3) is installed. A PLC controller (29) is fixedly installed on the gas storage unit (21). The first solenoid valves (24) and the second solenoid valves (28) are both electrically connected to the PLC controller (29).

2. The gas-water mixed fire extinguishing system for battery pack fire suppression according to claim 1, characterized in that: The gas storage unit (21) is a perfluoroketone high-pressure tank.

3. The gas-water mixed fire extinguishing system for battery pack fire suppression according to claim 1, characterized in that: Temperature sensors (4) are fixedly installed in each installation slot area where the battery packs (3) are installed. The temperature sensors (4) are electrically connected to the PLC controller (29).

4. The gas-water mixed fire extinguishing system for battery pack fire suppression according to claim 1, characterized in that: Uniformly distributed pulleys (31) are rotatably installed at the bottom of the battery pack (3). The pulleys (31) are made of high-carbon chromium steel. The bottom of the battery pack (3) is connected to the battery rack (1) through the pulleys (31).

5. The gas-water mixed fire extinguishing system for battery pack fire suppression according to claim 1, characterized in that: It further includes a package unloading trolley (5). A platform for receiving the battery pack (3) is provided on the package unloading trolley (5).

6. The gas-water mixed fire-fighting system for battery pack fire suppression according to claim 1, wherein: A handle (6) for pulling and installing is provided on the front of the battery pack (3).

7. The gas-water mixed fire suppression system for battery pack fire suppression according to claim 1, wherein: The opening and closing modes of the first solenoid valves (24) and the second solenoid valves (28) controlled by the PLC controller (29) are divided into the following scenarios: When the temperature in the installation slot area where the battery pack (3) is installed rises to the ignition temperature value, the first solenoid valve (24) at the connection of the gas storage unit (21) and the dual-medium delivery pipe (23) is opened, and the corresponding second solenoid valve (28) is opened to deliver perfluoroketone to the installation slot area where the target battery pack (3) is installed through the pipeline. When the temperature in the installation slot area where the battery pack (3) is installed rises above the ignition temperature value, the first solenoid valves (24) at the connections of the gas storage unit (21) and the water source pipe (22) with the dual-medium delivery pipe (23) are intermittently opened, and the corresponding second solenoid valves (28) are opened until the temperature in the installation slot area is within the normal value.

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