Battery pack fire-fighting device

Abstract

The utility model discloses a battery pack fire-fighting device which is integrally of a box-shaped structure, a first spraying group consisting of spraying pipes which are arranged in a transverse and longitudinal staggered manner is arranged on a supporting frame body at the top of the box-shaped structure, and the spraying pipes of the first spraying group are connected with an external fire-fighting water pipe through a first water inlet pipe; nozzles or openings of the spraying pipes of the first spraying group face downwards; a second spraying group consisting of spraying pipes which are arranged in a transverse and longitudinal staggered manner is arranged on the supporting frame body at the bottom of the box-shaped structure, the spraying pipes of the second spraying group are connected with an external fire-fighting water pipe through a second water inlet pipe, and nozzles or openings of the spraying pipes of the second spraying group face upwards; a cover plate is arranged at the top of the box structure; the pipe diameter of a water inlet of the first water inlet pipe is smaller than that of a water inlet of the second water inlet pipe.

Description

Technical Field

[0001] The utility model relates to a battery pack fire-fighting device. Background Art

[0002] The power battery pack of an electric vehicle is an energy storage component of the electric vehicle, storing a large amount of electrochemical energy inside. During the testing process of the battery pack, spontaneous combustion may occur, or there is a risk of BMS failure during testing. Once a failure occurs, a large amount of heat will be released, causing a fire and resulting in casualties and property losses. When the battery pack is stored in the laboratory, risks such as spontaneous combustion and fire may occur. Therefore, a device for storing the battery pack that can automatically extinguish fires is needed.

[0003] Currently, some battery packs are placed in an environmental chamber during testing. The environmental chamber is equipped with a fire extinguishing device, and when the battery pack catches fire spontaneously, the fire-fighting automatic extinguishing is activated.

[0004] When a fire or explosion occurs in the battery pack, the environmental chamber is damaged, resulting in a significant economic loss and high usage cost. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to overcome the above deficiencies of the prior art and provide a battery pack fire-fighting device with low usage cost and high fire extinguishing efficiency.

[0006] The technical problem to be solved can be implemented through the following technical solutions.

[0007] A battery pack fire-fighting device, characterized in that it has an overall box-shaped structure. On the support frame body at the top of the box-shaped structure, there is a first spray group composed of spray pipes arranged in a horizontal and vertical cross pattern. The spray pipes of the first spray group are connected to an external fire-fighting water pipe through a first water inlet pipe; the nozzles or openings of the spray pipes of the first spray group face downward;

[0008] On the support frame body at the bottom of the box-shaped structure, there is a second spray group composed of spray pipes arranged in a horizontal and vertical cross pattern. The spray pipes of the second spray group are connected to an external fire-fighting water pipe through a second water inlet pipe, and the nozzles or openings of the spray pipes of the second spray group face upward;

[0009] A cover plate is provided at the top of the box-shaped structure;

[0010] The diameter of the water inlet of the first water inlet pipe is smaller than the diameter of the water inlet of the second water inlet pipe.

[0011] Further, a temperature sensor and a smoke sensor are provided inside the box body of the box-shaped structure; the temperature sensor and the smoke sensor are signal-connected to a control system that can start and close the on-off valve on the fire-fighting pipeline.

[0012] Further, part or all of the cover plate is a transparent cover plate.

[0013] Further, part or all of the cover plate is of an openable and closable structure.

[0014] Further, a first transfer space is provided at the connection of the spray pipe of the first spray group and the external fire water pipe; a second transfer space is provided at the connection of the spray pipe of the second spray group and the external fire water pipe.

[0015] Furthermore, the smoke density sensor is arranged at the top of the internal space of the box-shaped structure, and the smoke density sensor is provided at at least three sampling points.

[0016] Furthermore, the temperature sensor is arranged at a position close to the battery pack inside the box-shaped structure, and the temperature sensor is provided at at least six sampling points.

[0017] Preferably, the water inlet of the first water inlet pipe is connected to a DN50 water inlet pipe, and the water inlet of the second water inlet pipe is connected to a DN100 water inlet pipe.

[0018] Further, an electric valve for controlling the opening and closing of the pipeline is provided on the water inlet pipeline of the first water inlet pipe; an electric valve for controlling the opening and closing of the pipeline is provided on the water inlet pipeline of the second water inlet pipe.

[0019] Further, a drain port and an overflow port are provided on the side wall of the box body of the box-shaped structure.

[0020] The battery pack fire-fighting device adopting the above technical scheme has the following characteristics and beneficial effects:

[0021] 1. The production cost of this fire-fighting device is low, and it can quickly immerse the battery pack within 10S to avoid the risk of fire;

[0022] 2. This fire-fighting device can be reused, saving the use cost;

[0023] 3. The size design of this battery pack can basically cover the sizes of all battery packs and is suitable for most battery packs. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the battery pack fire-fighting device of the present utility model;

[0025] Figure 2 It is a side structural diagram of the battery pack fire-fighting device of the present utility model;

[0026] Figure 3 is Figure 2 the view in the direction of C-C in

[0027] Figure 4 is Figure 2 the view in the direction of D-D in

[0028] Figure 5 View A-A in Figure 4 Figure;

[0029] In the figure: 1. Battery pack storage device; 2. Lower water inlet branch pipe assembly; 3. Upper water inlet branch pipe assembly; 4. Upper water inlet branch pipe box; 5. Lower water inlet branch pipe box; 6. DN50 flange interface; 7. DN100 flange interface; 8. DN50 water inlet pipe; 9. Drainage port; 10. DN100 water inlet pipe; 11. First upper cover frame; 12. Second upper cover frame; 13. First cover plate; 14. Second cover plate; 15. Handle; 16. Third cover plate; 17. Overflow port; 18. First spray group; 19. Second spray group. Specific embodiments

[0030] The following further details the specific embodiments of the present utility model in conjunction with the accompanying drawings.

[0031] In view of the possible fire occurrence during the test of the laboratory battery pack or the possible spontaneous combustion and fire during the storage and placement of the battery pack, the present utility model designs a fire extinguishing device, which is equipped with a temperature sensor and a smoke sensor. When the PLC detects abnormal temperature and smoke signals or the BMS system detects abnormal internal temperature of the battery pack during the test, the electric valves of the two-way fire water on the fire water pipe open, and the fire water immediately submerges the battery pack. When the PLC receives the signal from the liquid level sensor at the overflow port, the electric valves on the two-way fire water pipes automatically close.

[0032] Referring to Figures 1 to 5 , the specific structure of the battery pack fire extinguishing device of the present utility model is as follows:

[0033] The battery pack fire extinguishing device of the present utility model is overall a battery pack storage device 1 in a box-like structure. The bottom of the device is provided with a lower water inlet branch pipe assembly 2 as a basic framework. The bottom of the framework is provided with a bottom plate. The framework is provided with a second spray group 19 composed of spray pipes arranged in a crisscross pattern. The spray pipes of the second spray group are provided with nozzles or openings that can spray upward; the spray pipes of the second spray group are connected to the DN100 water inlet pipe 10 through the lower water inlet branch pipe box 5. The DN100 water inlet pipe 10 is externally connected to the DN100 flange interface 7, and is conveniently connected to the external fire water pipe through this flange interface. The lower water inlet branch pipe box 5 is a transfer space that facilitates the transfer of the liquid introduced by the external water pipe to the internal spray pipes.

[0034] Similarly, an upper water inlet branch pipe assembly 3 is provided at the top of the device as a basic framework. A first cover plate 13, a second cover plate 14, and a third cover plate 16 are sequentially arranged on the top of the framework as top plates. The first cover plate and the second cover plate are transparent plates, and handles 15 for opening (lifting) the cover plates are provided at the edges of the first cover plate and the second cover plate. Among them, the first cover plate 13 and the second cover plate 14 are respectively positioned on a first upper cover frame 11 and a second upper cover frame 12, and the third cover plate 16 is fixed on the upper water inlet branch pipe assembly 3. A first spray group 18 composed of spray pipes arranged in a crisscross pattern is also provided on the framework. Sprayers or openings for downward spraying are provided on the spray pipes of the first spray group. The spray pipes of the first spray group are connected to a DN50 water inlet pipe 8 through an upper water inlet branch pipe box 4. The DN50 water inlet pipe 8 is externally connected to a DN50 flange interface 6, and it is convenient to connect to an external fire water pipe through this flange interface. The upper water inlet branch pipe box 4 is a transfer space that facilitates the transfer of the liquid introduced by the external water pipe to the internal spray pipes.

[0035] Among them, the purpose of the openings provided on the spray pipes is to submerge the battery pack as quickly as possible. The two water inlets are connected to the fire water. Electric valves are respectively installed on the two water inlet pipes. When the PLC detects abnormal temperature or abnormal signals from the smoke sensors, the PLC outputs signals to open the electric valves on the water pipes, and the battery pack storage device is instantly filled with water to achieve the purpose of extinguishing the fire in the first time and prevent the occurrence of fire. The transparent cover plates (referring to the first cover plate and the second cover plate) facilitate observing the state of the battery pack at any time; the handles facilitate disassembly.

[0036] In addition, a drain port 9 at the lower part and an overflow port 17 at the upper part are also provided on the side of the box body structure. A liquid level sensor is installed at the overflow port. A manual ball valve is installed at the drain port.

[0037] Furthermore, the smoke sensors are installed at the top of the battery pack device, and at least three sampling points need to be installed. The temperature sensors are installed at positions close to the battery pack, and at least six sampling points are required. The number of openings on the spray pipes in the device is determined according to the required fire extinguishing time; the less the time, the more the holes.

[0038] A moving device can be added to this fire extinguishing device later to facilitate movement between laboratories and make it more convenient to use.

Claims

1. A battery pack fire protection device, characterized in that, It is in a box-like structure as a whole. On the support frame body at the top of the box-like structure, there is a first spray group composed of spray pipes arranged in a criss-cross pattern. The spray pipes of the first spray group are connected to an external fire water pipe through a first water inlet pipe; the nozzles or openings of the spray pipes of the first spray group face downward; On the support frame body at the bottom of the box-like structure, there is a second spray group composed of spray pipes arranged in a criss-cross pattern. The spray pipes of the second spray group are connected to an external fire water pipe through a second water inlet pipe. The nozzles or openings of the spray pipes of the second spray group face upward; There is a cover plate at the top of the box-like structure; The diameter of the water inlet of the first water inlet pipe is smaller than that of the water inlet of the second water inlet pipe.

2. The battery pack fire protection device according to claim 1, wherein, A temperature sensor and a smoke sensor are arranged inside the box body of the box-like structure; the temperature sensor and the smoke sensor are signal-connected to a control system that can start and stop the on-off valve on the fire pipeline.

3. The battery pack fire protection device according to claim 1, characterized in that, Part or all of the cover plate is a transparent cover plate.

4. The battery pack fire protection device according to claim 1 or 3, characterized in that Part or all of the cover plate is of an openable and closable structure.

5. The battery pack fire protection device according to claim 1, wherein There is a first transfer space at the connection between the spray pipes of the first spray group and the external fire water pipe; there is a second transfer space at the connection between the spray pipes of the second spray group and the external fire water pipe.

6. The battery pack fire protection device according to claim 2, wherein The smoke sensor is arranged at the top of the internal space of the box-like structure, and the smoke sensor is provided at at least three sampling points.

7. The battery pack fire protection device according to claim 2, characterized in that, The temperature sensor is arranged at a position close to the battery pack inside the box-like structure, and the temperature sensor is provided at at least six sampling points.

8. The battery pack fire protection device according to claim 1, wherein, The water inlet of the first water inlet pipe is connected to a DN50 water inlet pipe, and the water inlet of the second water inlet pipe is connected to a DN100 water inlet pipe.

9. The battery pack fire protection device according to claim 1 or 8, characterized in that, An electric valve for controlling the opening and closing of the pipeline is arranged on the water inlet pipeline of the first water inlet pipe; an electric valve for controlling the opening and closing of the pipeline is also arranged on the water inlet pipeline of the second water inlet pipe.

10. The battery pack fire protection device according to claim 1, characterized in that, A drain port and an overflow port are arranged on the side wall of the box body of the box-like structure.

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