A battery box with fire extinguishing function

Abstract

The present invention discloses a battery box with a fire extinguishing function, which relates to the field of battery safety technology and includes a box body and a box cover. The box cover is installed at the upper end of the box body. Two sets of isolation members are symmetrically provided in the box body, dividing the box body into fire extinguishing chambers located on both sides and a battery chamber located in the middle and connected to the fire extinguishing chamber. A fire extinguishing unit is placed in the fire extinguishing chamber, and a battery pack is placed in the battery chamber. The present invention has a simple structure, adopts an external installation method, can be completely separated from the box body, and adopts a plate-like structural design, which occupies a small space. As long as the fire extinguishing unit in this solution does not suffer structural damage, it can still continue to be used, and has a high reuse rate. Multiple exhaust pipes are provided, and fire extinguishing gas can be sprayed from multiple positions, which has a high fire extinguishing efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery safety, and in particular relates to a battery box with a fire extinguishing function. Background Art

[0002] Currently, fire extinguishing products used in battery compartments for electric bicycles or electric vehicles primarily consist of portable fire extinguishers, aerosol fire extinguishers, and pressure-storage fire extinguishers such as carbon dioxide. These devices often require manual operation and are externally mounted. This can lead to late detection, missing the optimal opportunity to extinguish a fire. Furthermore, manual extinguishing is inefficient. Existing fire extinguishing devices located within the battery compartment are also known. For example, Chinese Patent Publication No. CN212950959U describes an electric bicycle battery compartment with an automatic fire extinguishing function. This device generates high temperatures in the battery, causing a safety wire to break due to the high temperature. This allows the modules to release fire extinguishing gas, effectively extinguishing the battery fire. However, the technical solution is complex, the fire extinguishing unit is difficult to separate from the battery compartment, resulting in low reusability. It occupies a significant amount of internal space within the battery compartment. Furthermore, when a fire occurs, the fire extinguishing gas is discharged through a single connecting pipe, resulting in a long fire extinguishing process. Summary of the Invention

[0003] The object of the present invention is to provide a battery box with a fire extinguishing function to solve the above-mentioned defects caused by the prior art.

[0004] A battery box with a fire extinguishing function, comprising a box body and a box cover, the box cover being installed at the upper end of the box body, two groups of isolation pieces being symmetrically provided in the box body and dividing the box body into fire extinguishing chambers on both sides and a battery chamber located in the middle and connected to the fire extinguishing chambers, a fire extinguishing unit being placed in the fire extinguishing chamber, a battery pack being placed in the battery chamber, the fire extinguishing unit comprising a plate-shaped hollow shell, the shell being filled with fire extinguishing gas, a through hole being provided at the geometric center of the shell, a sleeve being installed in the through hole, four exhaust pipes being connected to the interior of the shell being provided on the side of the shell facing the battery chamber, an air plug rod being passed through the exhaust pipe for temporarily blocking the exhaust pipe, one end of the air plug rod being connected to a traction rope, the other end of the traction rope being connected to the telescopic unit in the sleeve, and the telescopic unit being able to pull the traction rope and pull the air plug rod out of the exhaust pipe at high temperatures.

[0005] Preferably, the telescopic unit includes a piston cylinder, a piston, a piston rod and a connecting plate. The piston cylinder is installed in the sleeve with the help of a base and a gap is left between the outer wall of the piston cylinder and the inner wall of the sleeve. The piston is slidably connected in the piston cylinder, and alcohol is filled between the piston and the bottom surface of the piston cylinder. The two ends of the piston rod are respectively connected to the piston and the connecting plate, and the connecting plate is fixedly connected to the traction rope. The base is also provided with a mounting hole that is through and arranged along its axial direction, and a heat conducting plate is fixed in the mounting hole.

[0006] Preferably, the outer periphery of the exhaust pipe is further provided with an arc-shaped guard plate, and the height of the arc-shaped guard plate is not less than the length of the exhaust pipe.

[0007] Preferably, the gas plug rod is made of magnetic metal, and a magnet arranged opposite to the gas plug rod is fixed on the inner side of the arc-shaped guard plate.

[0008] Preferably, the sleeve is provided with a through hole for the traction rope to pass through.

[0009] Preferably, the two adjacent exhaust pipes are symmetrically arranged.

[0010] Preferably, a pad is provided on the side of the shell facing the battery cavity, and a channel for protecting the traction rope is formed between two adjacent pads.

[0011] Preferably, the pad is integrally formed with the shell and communicates with the interior of the shell.

[0012] Preferably, the pad is made of heat-insulating material.

[0013] Preferably, the isolation member is a rectangular steel tube.

[0014] The advantages of the present invention are:

[0015] 1. The present invention has a simple structure and adopts an external installation method. It can be completely separated from the box body and adopts a plate-shaped structural design, which occupies a small space. In addition, the fire extinguishing unit in this solution can continue to be used as long as there is no structural damage, and the reuse rate is high.

[0016] 2. The present invention is provided with multiple exhaust pipes, which can spray fire extinguishing gas from multiple positions, and the fire extinguishing efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is an internal schematic diagram of the present invention.

[0019] Figure 3 This is a top view of the box.

[0020] Figure 4 Schematic diagram of the structure of the fire extinguishing unit.

[0021] Figure 5 for Figure 4 A partial enlarged view of point A in the middle.

[0022] Figure 6 It is a cross-sectional view of the fire extinguishing unit.

[0023] Figure 7 for Figure 6A partial enlarged view of point B in the middle.

[0024] Among them: 1 box body, 2 box cover, 3 isolation piece, 4 fire extinguishing unit, 40 shell, 41 through hole, 42 sleeve, 43 exhaust pipe, 44 air plug rod, 45 traction rope, 46 telescopic unit, 460 piston cylinder, 461 piston, 462 piston rod, 463 connecting plate, 464 base, 465 heat conducting plate, 47 arc guard plate, 48 magnet, 49 pad, 490 channel, 410 alcohol, 5 fire extinguishing chamber, 6 battery chamber. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0026] like Figures 1 to 7 As shown, a battery box with a fire extinguishing function includes a box body 1 and a box cover 2, the box cover 2 is installed at the upper end of the box body 1, and two sets of partitions 3 are symmetrically provided in the box body 1 to divide the box body 1 into fire extinguishing chambers 5 on both sides and a battery chamber 6 located in the middle and connected to the fire extinguishing chamber 5. The partition 3 is a rectangular steel tube, a fire extinguishing unit 4 is placed in the fire extinguishing chamber 5, a battery pack is placed in the battery chamber 6, and the fire extinguishing unit 4 includes a plate-shaped hollow shell 40, the shell 40 is filled with a fire extinguishing gas, and the fire extinguishing gas can be an inert gas. A through hole 41 is provided at the geometric center of the shell 40. The through hole 4 1 is installed in the housing 40. Four exhaust pipes 43 connected to the interior of the housing 40 are provided on the side of the housing 40 facing the battery chamber 6. The two adjacent exhaust pipes 43 are symmetrically arranged. An air plug rod 44 for temporarily blocking the exhaust pipe 43 is passed through the exhaust pipe 43. One end of the air plug rod 44 is connected to a traction rope 45, and the other end of the traction rope 45 is connected to a telescopic unit 46 in the sleeve 42. The sleeve 42 is provided with a through hole for the traction rope 45 to pass through. At high temperature, the telescopic unit 46 can pull the traction rope 45 and pull the air plug rod 44 out of the exhaust pipe 43. The traction rope 45 is made of refractory material.

[0027] In this embodiment, the telescopic unit 46 includes a piston cylinder 460, a piston 461, a piston rod 462 and a connecting plate 463. The piston cylinder 460 is installed in the sleeve 42 with the aid of a base 464, and a gap is left between the outer wall of the piston cylinder 460 and the inner wall of the sleeve 42. The piston 461 is slidably connected to the piston cylinder 460, and the bottom surface of the piston 461 and the piston cylinder 460 is filled with alcohol 410. The two ends of the piston rod 462 are respectively connected to the piston 461 and the connecting plate 463. The connecting plate 463 is fixedly connected to the traction rope 45. The base 464 is also provided with a mounting hole that is through and arranged along its axial direction, and a copper heat conducting plate 465 is fixed in the mounting hole.

[0028] In this embodiment, an arc-shaped guard plate 47 is further provided on the outer periphery of the exhaust pipe 43. The height of the arc-shaped guard plate 47 is not less than the length of the exhaust pipe 43. The gas plug rod 44 is made of magnetic metal. A magnet 48 arranged opposite to the gas plug rod 44 is fixed on the inner side of the arc-shaped guard plate 47.

[0029] In this embodiment, a pad 49 is further provided on the side of the shell 40 facing the battery chamber 6 , and a channel 490 for protecting the traction rope 45 is formed between two adjacent pads 49 .

[0030] The aforementioned spacer 49 can be constructed in two ways. One is that the spacer 49 is integrally formed with the housing 40 and communicates with the interior of the housing 40, thereby increasing the capacity of the fire-extinguishing gas and improving the fire-extinguishing effect. Another is that the spacer 49 is made of a heat-insulating material to isolate the fire-extinguishing gas within the housing 40 from the effects of rising battery temperatures during operation.

[0031] The fire extinguishing method of the present invention is as follows:

[0032] When the battery pack becomes abnormal and continues to generate high temperature, its temperature will be transferred to the heat conducting plate 465, and the heat conducting plate 465 will transfer the temperature to the alcohol 410 in the piston cylinder 460. The alcohol 410 evaporates and generates gas. As the gas gradually increases, the air pressure also gradually increases until the piston 461 is pushed out. Under the action of the connecting plate 463, the traction rope 45 and the air plug rod 44 are pulled, and the suction force of the magnet 48 is overcome, and finally the air plug rod 44 is pulled out of the exhaust pipe 43. The exhaust pipe 43 is opened, and the fire extinguishing gas in the shell 40 is ejected from the four exhaust pipes 43 to extinguish the battery pack.

[0033] It is understood from common technical knowledge that the present invention may be implemented by other embodiments that do not depart from its spirit or essential features. Therefore, the embodiments disclosed above are, in all respects, merely illustrative and not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are intended to be encompassed by the present invention.

Claims

1. A battery box with fire extinguishing function, comprising a box body and a box cover, wherein the box cover (2) is mounted on the upper end of the box body (1), characterized in that: Two groups of isolating members (3) are symmetrically arranged in the box (1) to divide the box (1) into fire extinguishing chambers (5) located on both sides and a battery chamber (6) located in the middle and connected to the fire extinguishing chambers (5). A fire extinguishing unit (4) is placed in the fire extinguishing chamber (5), and a battery pack is placed in the battery chamber (6). The fire extinguishing unit (4) includes a plate-shaped hollow shell (40), the shell (40) is filled with fire extinguishing gas, and a through hole (41) is provided at the geometric center of the shell (40), and a sleeve ( 42), four exhaust pipes (43) communicating with the interior of the housing (40) are provided on one side of the housing (40) facing the battery chamber (6), an air plug rod (44) for temporarily blocking the exhaust pipe (43) is passed through the exhaust pipe (43), one end of the air plug rod (44) is connected to a traction rope (45), and the other end of the traction rope (45) is connected to a telescopic unit (46) in the sleeve (42), and the telescopic unit (46) can pull the traction rope (45) and pull the air plug rod (44) out of the exhaust pipe (43) at high temperature.

2. The battery box with fire extinguishing function according to claim 1, characterized in that: The telescopic unit (46) includes a piston cylinder (460), a piston (461), a piston rod (462) and a connecting plate (463). The piston cylinder (460) is installed in the sleeve (42) with the help of a base (464), and a gap is left between the outer wall of the piston cylinder (460) and the inner wall of the sleeve (42). The piston (461) is slidably connected to the piston cylinder (460). Alcohol (410) is filled between the piston (461) and the bottom surface of the piston cylinder (460). The two ends of the piston rod (462) are respectively connected to the piston (461) and the connecting plate (463). The connecting plate (463) is fixedly connected to the traction rope (45). The base (464) is also provided with a mounting hole that is through and arranged along its axial direction, and a heat conducting plate (465) is fixed in the mounting hole.

3. The battery box with fire extinguishing function according to claim 1, characterized in that: The outer periphery of the exhaust pipe (43) is further provided with an arc-shaped guard plate (47), and the height of the arc-shaped guard plate (47) is not less than the length of the exhaust pipe (43).

4. The battery box with fire extinguishing function according to claim 3, characterized in that: The gas plug rod (44) is made of magnetic metal, and a magnet (48) arranged opposite to the gas plug rod (44) is fixed on the inner side of the arc-shaped guard plate (47).

5. The battery box with fire extinguishing function according to claim 1, characterized in that: The sleeve (42) is provided with a through hole for the traction rope (45) to pass through.

6. The battery box with fire extinguishing function according to claim 1, characterized in that: The two adjacent exhaust pipes (43) are both symmetrically arranged.

7. The battery box with fire extinguishing function according to claim 6, characterized in that: A pad (49) is further provided on the side of the housing (40) facing the battery chamber (6), and a channel (490) for protecting the traction rope (45) is formed between two adjacent pads (49).

8. The battery box with fire extinguishing function according to claim 7, characterized in that: The cushion block (49) is integrally formed with the housing (40) and is in communication with the interior of the housing (40).

9. The battery box with fire extinguishing function according to claim 7, characterized in that: The cushion block (49) is made of heat-insulating material.

10. The battery box with fire extinguishing function according to claim 1, characterized in that: The isolating member (3) is a rectangular steel tube.

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