Fire extinguishing device for energy storage battery pack

Abstract

The utility model provides a fire extinguishing device for an energy storage battery pack, and belongs to the technical field of energy storage batteries. The energy storage battery pack fire extinguishing device comprises a bottom shell and a liquid injection fire extinguishing mechanism, a battery is installed in the bottom shell, a top shell is installed on the top of the bottom shell, a controller is installed on the left side of the top of the top shell, a liquid storage box is fixedly connected to the top of the top shell, fire extinguishing liquid is arranged in the liquid storage box, and a liquid injection pipe is fixedly connected to the bottom of the liquid storage box. An electromagnetic valve electrically connected with the controller is installed on the surface of the liquid injection pipe, the adding opening is formed in the top of the liquid storage tank, an adding plug is installed in the adding opening, and the circulating cooling mechanism is arranged in the bottom shell. The motor is subjected to liquid injection cooling soaking type oxygen isolation fire extinguishing work, the situation that a fire source is difficult to extinguish rapidly due to the fact that the internal temperature is high in the battery using process is avoided, and therefore the fire extinguishing efficiency and effect of the bottom shell are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage batteries, and more specifically, to a fire extinguishing device for an energy storage battery pack. Background Art

[0002] An energy storage battery pack is an important device for storing and releasing electrical energy, which is widely used in fields such as electric vehicles, renewable energy systems, and power grid peak shaving. It consists of multiple battery cells, a battery management system, a mechanical bracket, etc., and can provide high-capacity and high-power electrical energy output. A fire extinguishing device is equipped in the energy storage battery pack to handle extreme situations during the operation of the energy storage battery pack. The fire extinguishing device can quickly control and extinguish the fire in case of a fire to protect the safety of the surrounding environment. Since the energy storage battery pack will catch fire very quickly once it is short-circuited and heated, it is necessary to quickly cool down and extinguish the fire of the energy storage battery pack.

[0003] In the related art, during the use of the fire extinguishing device, generally, a flame detector is used to detect smoke and flames in the energy storage battery pack, and a fire extinguishing component is used to extinguish the fire in the energy storage battery pack for use.

[0004] However, during the use of the current fire extinguishing device, since the detection of the flame detector requires smoke and flames as triggering conditions, when smoke and flames appear in the energy storage battery pack, the energy storage battery pack is already very dangerous and may even explode at any time, which affects the fire extinguishing efficiency and effect of the energy storage battery pack. Summary of the Utility Model

[0005] To make up for the above deficiencies, the utility model provides a fire extinguishing device for an energy storage battery pack that overcomes the above technical problems or at least partially solves the above problems.

[0006] The utility model is implemented as follows:

[0007] The utility model provides a fire extinguishing device for an energy storage battery pack, including a bottom case, a battery is installed inside the bottom case, a top case is installed on the top of the bottom case, and a controller is installed on the left side of the top of the top case;

[0008] A liquid injection fire extinguishing mechanism; the liquid injection fire extinguishing mechanism includes;

[0009] A liquid storage tank; the liquid storage tank is fixedly connected to the top of the top case, and a fire extinguishing liquid is provided inside the liquid storage tank;

[0010] A liquid injection pipe; the liquid injection pipe is fixedly connected to the bottom of the liquid storage tank, and an electromagnetic valve electrically connected to the controller is installed on the surface of the liquid injection pipe;

[0011] An addition port; the addition port is opened on the top of the liquid storage tank, and an addition plug is installed inside the addition port;

[0012] Circulating cooling mechanism; the circulating cooling mechanism is arranged inside the bottom shell.

[0013] In a preferred embodiment, the circulating cooling mechanism includes a circulating cavity, a circulating tank and a circulating liquid. The circulating cavity is opened inside the bottom shell. The circulating tank is fixedly connected to the left side of the front side of the bottom shell. The circulating tank is communicated with the circulating cavity. The circulating liquid is added inside the circulating cavity and the circulating tank.

[0014] In a preferred embodiment, a semiconductor refrigeration plate is fixedly connected to the front side of the circulating tank. A water pump is fixedly connected to the top of the circulating tank. The input end of the water pump is communicated with the circulating cavity. The output end of the water pump is communicated with the circulating tank. The semiconductor refrigeration plate and the water pump are both electrically connected to the controller through wires.

[0015] In a preferred embodiment, a protective frame located outside the semiconductor refrigeration plate is fixedly connected to the front side of the circulating tank. Heat dissipation fins in contact with the semiconductor refrigeration plate are fixedly connected to the inner wall of the protective frame.

[0016] In a preferred embodiment, a temperature sensor is fixedly connected to the right side of the top of the inner wall of the top shell. A liquid level sensor is fixedly connected to the left side of the inner wall of the top shell. The temperature sensor and the liquid level sensor are both electrically connected to the controller through wires.

[0017] In a preferred embodiment, reinforcing seats are fixedly connected to the four circumferences of the inner wall of the circulating cavity. There are several reinforcing seats, and several reinforcing seats are evenly distributed.

[0018] In a preferred embodiment, a sealing groove is opened at the bottom of the top shell. A sealing frame is movably connected inside the sealing groove. The bottom of the sealing frame is fixedly connected to the top of the bottom shell.

[0019] In a preferred embodiment, a liquid filling port is opened at the right side of the top of the circulating tank. A liquid filling plug is movably connected inside the liquid filling port.

[0020] The beneficial effects of a fire extinguishing device for an energy storage battery pack provided by the present utility model include:

[0021] 1. By setting the liquid injection fire extinguishing mechanism, when the bottom shell is used in cooperation with the battery, liquid injection and cooling immersion type oxygen isolation fire extinguishing work can be carried out on the motor, avoiding the situation that it is difficult to quickly extinguish the fire source due to the high internal temperature during the use of the battery. Therefore, the fire extinguishing efficiency and effect of the bottom shell are improved.

[0022] 2. By setting up a circulating cooling mechanism, when the bottom case is used in combination with the battery, it can cyclically absorb and cool the thermal temperature inside the bottom case, avoiding the situation where the internal temperature of the bottom case is too high during operation, which may cause the battery to overheat and short-circuit and catch fire. Therefore, the cooling effect of the bottom case is improved.

[0023] 3. By setting up a semiconductor refrigeration plate and a water pump, when the circulation tank is used in combination with the circulating liquid, it can cyclically cool the circulating liquid and provide a suction and circulation force for the circulating liquid, avoiding the situation where it is difficult to carry out cooling circulation during the operation of the circulating liquid. Therefore, the circulating cooling effect of the circulating liquid is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0025] Figure 1 is the overall three-dimensional view provided by the embodiment of the present invention;

[0026] Figure 2 is the three-dimensional sectional structure schematic diagram of the bottom case provided by the embodiment of the present invention;

[0027] Figure 3 is the three-dimensional sectional structure schematic diagram of the top case provided by the embodiment of the present invention;

[0028] Figure 4 is the three-dimensional sectional structure schematic diagram of the circulation tank provided by the embodiment of the present invention;

[0029] In the figure: 1. Bottom case; 2. Battery; 3. Top case; 4. Controller; 5. Liquid storage tank; 6. Fire extinguishing liquid; 7. Liquid injection pipe; 8. Solenoid valve; 9. Filling port; 10. Filling plug; 11. Circulation cavity; 12. Circulation tank; 13. Circulating liquid; 14. Semiconductor refrigeration plate; 15. Water pump; 16. Protection frame; 17. Heat sink; 18. Temperature sensor; 19. Liquid level sensor; 20. Reinforcement seat; 21. Sealing groove; 22. Sealing frame; 23. Liquid filling port; 24. Liquid filling plug. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] Referring to Figures 1-4 , the present utility model provides a technical solution: a fire extinguishing device for an energy storage battery pack, including a bottom case 1 and a liquid injection fire extinguishing mechanism. A battery 2 is installed inside the bottom case 1, a top case 3 is installed on the top of the bottom case 1, and a controller 4 is installed on the left side of the top of the top case 3. When the bottom case 1 is used in cooperation with the battery 2, it can perform liquid injection cooling and oxygen isolation fire extinguishing work on the motor, avoiding the situation that it is difficult to quickly extinguish the fire source due to the high internal temperature during the use of the battery 2. Therefore, the fire extinguishing efficiency and effect of the bottom case 1 are improved.

[0032] Referring to Figures 1-4 , in a preferred embodiment, the liquid injection fire extinguishing mechanism includes a liquid storage tank 5 fixedly connected to the top of the top case 3. A fire extinguishing liquid 6 is provided inside the liquid storage tank 5. A liquid injection pipe 7 is fixedly connected to the bottom of the liquid storage tank 5. An electromagnetic valve 8 electrically connected to the controller 4 is installed on the surface of the liquid injection pipe 7. An addition port 9 is opened on the top of the liquid storage tank 5, and an addition plug 10 is installed inside the addition port 9. A circulating cooling mechanism is provided inside the bottom case 1. The fire extinguishing liquid 6 is added into the liquid storage tank 5 through the addition port 9 and the addition plug 10. When the temperature of the battery 2 inside the bottom case 1 rises, the controller 4 activates the electromagnetic valve 8 to open the liquid outlet pipe, so that the fire extinguishing liquid 6 enters the inside of the bottom case 1 to perform liquid injection cooling and soaking fire extinguishing work on the battery 2. Since the fire extinguishing liquid 6 is insulating oil, it will not damage the normal battery 2 when soaking and extinguishing the fire on the battery 2, ensuring the fire extinguishing efficiency or effect of the battery 2. The circulating cooling mechanism includes a circulating cavity 11, a circulating tank 12, and a circulating liquid 13. The circulating cavity 11 is opened inside the bottom case 1. The circulating tank 12 is fixedly connected to the left side of the front of the bottom case 1. The circulating tank 12 is communicated with the circulating cavity 11. The circulating liquid 13 is added inside the circulating cavity 11 and the circulating tank 12. When the bottom case 1 is used in cooperation with the battery 2, it can perform circulating heat absorption and cooling work on the internal heat temperature of the bottom case 1, avoiding the situation that the internal temperature of the bottom case 1 is too high during operation, resulting in the battery 2 being heated and short-circuited and catching fire. Therefore, the cooling effect of the bottom case 1 is improved.

[0033] Referring to Figure 1, in a preferred embodiment, a semiconductor refrigeration plate 14 is fixedly connected to the front side of the circulation tank 12, a water pump 15 is fixedly connected to the top of the circulation tank 12, the input end of the water pump 15 is communicated with the circulation cavity 11, the output end of the water pump 15 is communicated with the circulation tank 12, and both the semiconductor refrigeration plate 14 and the water pump 15 are electrically connected to the controller 4 through wires. When the circulation tank 12 is used in cooperation with the circulating liquid 13, the circulating liquid 13 can be circulated and cooled, and a suction circulation force can be provided for the circulating liquid 13 to avoid the situation that it is difficult to carry out cooling circulation when the circulating liquid 13 is working. Therefore, the circulating cooling effect of the circulating liquid 13 is improved. A protective frame 16 located outside the semiconductor refrigeration plate 14 is fixedly connected to the front side of the circulation tank 12, and heat dissipation fins 17 in contact with the semiconductor refrigeration plate 14 are fixedly connected to the inner wall of the protective frame 16. When the semiconductor refrigeration plate 14 is used in cooperation with the circulation tank 12, the semiconductor refrigeration plate 14 can be protected and externally conducted for heat dissipation, avoiding the situation that the semiconductor refrigeration plate 14 is damaged or difficult to externally conduct heat dissipation due to the influence of external objects during operation. Therefore, the working stability and heat dissipation effect of the semiconductor refrigeration plate 14 are improved.

[0034] Refer to Figures 2-3 , in a preferred embodiment, a temperature sensor 18 is fixedly connected to the right side of the inner wall top of the top shell 3, a liquid level sensor 19 is fixedly connected to the left side of the inner wall of the top shell 3, and both the temperature sensor 18 and the liquid level sensor 19 are electrically connected to the controller 4 through wires. When the controller 4 is used in cooperation with the solenoid valve 8, the temperature inside the bottom shell 1 can be monitored in real time, and the liquid level height during the injection of the liquid through the injection pipe 7 when the solenoid valve 8 is opened can be monitored, avoiding the situation that it is difficult to monitor the temperature and injection height inside the bottom shell 1. Therefore, the convenience of controlling the temperature and injection height of the bottom shell 1 is improved. Reinforcement seats 20 are fixedly connected to the four circumferences of the inner wall of the circulation cavity 11. There are several reinforcement seats 20, and several reinforcement seats 20 are equidistantly distributed. When the circulation cavity 11 is used in cooperation with the bottom shell 1, the circulation cavity 11 can be reinforced to avoid the situation that the circulation cavity 11 is deformed during operation, resulting in the obstruction of the working of the circulating liquid 13. Therefore, the working stability of the circulation cavity 11 is improved.

[0035] Refer to Figures 3-4, in a preferred embodiment, a sealing groove 21 is formed at the bottom of the top shell 3, and a sealing frame 22 is movably connected inside the sealing groove 21. The bottom of the sealing frame 22 is fixedly connected to the top of the bottom shell 1. When the top shell 3 cooperates with the bottom shell 1 to work, the closing part between the top shell 3 and the bottom shell 1 can be sealed by misaligned contact, avoiding the difficult sealing situation after the top shell 3 and the bottom shell 1 are closed. Therefore, the closing convenience of the top shell 3 is improved. A liquid adding port 23 is formed on the right side of the top of the circulation tank 12, and a liquid adding plug 24 is movably connected inside the liquid adding port 23. When the circulation tank 12 cooperates with the circulation cavity 11 to work, it can provide a space for adding the circulating liquid 13 and a closing and sealing medium for the circulation cavity 11, avoiding the difficult situations of adding the circulating liquid 13 and sealing when the circulation tank 12 is in use. Therefore, the adding and sealing convenience of the circulating liquid 13 is improved.

[0036] Specifically, the working process or working principle of the energy storage battery pack fire extinguishing device is as follows: during use, the fire extinguishing liquid 6 and the circulating liquid 13 are respectively added into the liquid storage tank 5 and the circulation tank 12 through the adding port 9 and the liquid adding port 23, and then the adding port 9 and the liquid adding port 23 are closed and sealed by holding the adding plug 10 and the liquid adding plug 24. Subsequently, the temperature sensor 18 and the liquid level sensor 19 are started by the controller 4 to monitor the temperature inside the bottom shell 1 in real time. When the temperature of the battery 2 inside the bottom shell 1 rises due to a short circuit, the temperature sensor 18 transmits a signal to the controller 4. After receiving the signal, the controller 4 starts the solenoid valve 8 to open the liquid injection pipe 7, so that the fire extinguishing liquid 6 inside the liquid storage tank 5 is injected into the bottom shell 1 to soak and cool the battery 2 for fire extinguishing work. At this time, the liquid level sensor 19 monitors the height of the injected fire extinguishing liquid 6. When the height of the fire extinguishing liquid 6 contacts the liquid level sensor 19, the liquid level sensor 19 transmits a signal to the controller 4. After receiving the signal, the controller 4 starts the solenoid valve 8 to close the liquid injection port. At the same time, the controller 4 starts the water pump 15 to suck the circulating liquid 13 inside the circulation cavity 11 into the circulation tank 12, and circulates the circulation tank 12 cooled by the semiconductor refrigeration plate 14 inside the circulation tank 12 to the circulation cavity 11 to cool the bottom shell 1, ensuring that the fire extinguishing liquid 6 inside the bottom shell 1 is in a low temperature state to soak and cool the battery 2 for fire extinguishing work. During this process, the sealing frame 22 cooperates with the sealing port to perform misaligned sealing work between the bottom shell 1 and the top shell 3. At the same time, the protective frame 16 cooperates with the heat sink 17 to protect the semiconductor refrigeration plate 14 and conduct heat outward, ensuring the refrigeration stability and heat dissipation effect of the semiconductor refrigeration plate 14. During the working process of the battery 2, according to the actual use situation, the water pump 15 and the semiconductor refrigeration plate 14 can be started separately by the controller 4 to perform the suction and circulation work on the circulating liquid 13, so that the battery 2 works in a relatively low temperature state, reducing the situation of overheating and short circuit.

[0037] It should be noted that the controller 4, the solenoid valve 8, the semiconductor refrigeration plate 14, the water pump 15, the temperature sensor 18, and the liquid level sensor 19 are devices or equipment existing in the prior art, or devices or equipment that can be realized by the prior art. Their power supply, specific composition, and principle are clear to those skilled in the art, so they will not be described in detail herein.

Claims

1. A fire extinguishing device for an energy storage battery pack, comprising a bottom shell (1), a battery (2) installed inside the bottom shell (1), a top shell (3) installed on the top of the bottom shell (1), and a controller (4) installed on the left side of the top of the top shell (3), characterized in that ； Liquid injection fire extinguishing mechanism; the liquid injection fire extinguishing mechanism comprises: A liquid storage tank (5); the liquid storage tank (5) is fixedly connected to the top of the top shell (3), and a fire extinguishing liquid (6) is arranged inside the liquid storage tank (5); A liquid injection pipe (7); the liquid injection pipe (7) is fixedly connected to the bottom of the liquid storage tank (5), and a solenoid valve (8) electrically connected to the controller (4) is installed on the surface of the liquid injection pipe (7); A feeding port (9); the feeding port (9) is opened at the top of the liquid storage tank (5), and a feeding plug (10) is installed inside the feeding port (9); A circulating cooling mechanism; the circulating cooling mechanism is arranged inside the bottom shell (1); The circulating cooling mechanism comprises a circulating chamber (11), a circulating box (12) and a circulating liquid (13); the circulating chamber (11) is opened inside the bottom shell (1); the circulating box (12) is fixedly connected to the left side of the front side of the bottom shell (1); the circulating box (12) is connected to the circulating chamber (11); and the circulating liquid (13) is added to the circulating chamber (11) and the inside of the circulating box (12).

2. The energy storage battery pack fire extinguishing device according to claim 1, characterized in that: A semiconductor refrigeration plate (14) is fixedly connected to the front side of the circulation box (12), and a water pump (15) is fixedly connected to the top of the circulation box (12). The input end of the water pump (15) is connected to the circulation chamber (11), and the output end of the water pump (15) is connected to the circulation box (12). The semiconductor refrigeration plate (14) and the water pump (15) are both electrically connected to the controller (4) via wires.

3. The energy storage battery pack fire extinguishing device according to claim 2, characterized in that: The front side of the circulation box (12) is fixedly connected to a protection frame (16) located outside the semiconductor refrigeration plate (14), and the inner wall of the protection frame (16) is fixedly connected to a heat sink (17) in contact with the semiconductor refrigeration plate (14).

4. The energy storage battery pack fire extinguishing device according to claim 1, characterized in that: A temperature sensor (18) is fixedly connected to the right side of the top of the inner wall of the top shell (3), and a liquid level sensor (19) is fixedly connected to the left side of the inner wall of the top shell (3). Both the temperature sensor (18) and the liquid level sensor (19) are electrically connected to the controller (4) via a wire.

5. The energy storage battery pack fire extinguishing device according to claim 1, characterized in that: The inner wall of the circulation chamber (11) is fixedly connected with reinforcement seats (20) on all sides, and a plurality of reinforcement seats (20) are provided, and the plurality of reinforcement seats (20) are distributed at equal distances.

6. The energy storage battery pack fire extinguishing device according to claim 1, characterized in that: The bottom of the top shell (3) is provided with a sealing groove (21), the interior of the sealing groove (21) is movably connected to a sealing frame (22), and the bottom of the sealing frame (22) is fixedly connected to the top of the bottom shell (1).

7. The energy storage battery pack fire extinguishing device according to claim 1, characterized in that: A liquid adding port (23) is provided on the right side of the top of the circulation box (12), and a liquid adding plug (24) is movably connected inside the liquid adding port (23).

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