Explosion-proof battery box shell

Abstract

The utility model relates to the technical field of battery box shells, solves the technical problem that a fire extinguishing system in a battery pack in a safe battery box cannot completely relieve the fire risk when the battery pack in the safe battery box is on fire, and particularly relates to an explosion-proof battery box shell which comprises a shell and a fire extinguishing system arranged in the shell, a pressure relief mechanism used for guiding the fire extinguishing agent to be discharged is arranged in the shell, and an anti-blocking mechanism used for preventing the battery pack from reburning is arranged in the shell; the pressure relief mechanism comprises an eduction tube installed on the inner wall of the shell, a piston plate is arranged in the eduction tube, and a drainage port is formed in the side, outside the shell, of the eduction tube. When the fire extinguishing system in the shell works, a large amount of fire extinguishing agent is generated, the shell is filled with the large amount of fire extinguishing agent, and the large amount of fire extinguishing agent extrudes the piston plate to unidirectionally move in the eduction pipe, so that the fire extinguishing agent continuously moves to the outer side of the shell through the eduction pipe, and the fire extinguishing system can continuously spray out the fire extinguishing agent; therefore, the fire source of the battery pack is completely eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of battery box shells, in particular to an explosion-proof battery box shell. Background Art

[0002] The battery box shell serves as the outer shell of the battery pack and is used to protect the internal structure and battery cells of the battery pack. The prior art discloses a safety battery box with a publication number of CN214203864U. The safety battery box fixes the battery in the battery pack slot by using reinforcing ribs, and a hollow pipe is arranged above the battery pack slot. When a battery pack of the safety battery box catches fire, the hollow pipe therein will transport the fire extinguishing agent, and the fire extinguishing agent will be sprayed out from the explosion release valve through the arc-shaped fire extinguishing nozzle, thereby achieving the purpose of eliminating the risk of fire.

[0003] However, when the safety battery box is in use, the fire extinguishing system inside the safety battery box will spray out fire extinguishing agent to extinguish the fire at the fire point of the safety battery box. However, when the fire extinguishing system sprays out the fire extinguishing agent, a large amount of fire extinguishing agent will quickly fill the interior of the safety battery box, thereby clogging the nozzle of the fire extinguishing system, causing the fire extinguishing system to be unable to continue to extinguish the fire, and unable to successfully eliminate the fire risk of the safety battery box, which poses certain safety hazards. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an explosion-proof battery box shell, which solves the technical problem that when the battery pack inside the safety battery box catches fire, the fire extinguishing system inside the safety battery box cannot completely eliminate the fire risk, thereby achieving the purpose of protecting users from fire during the use of the safety battery box and successfully extinguishing the fire.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] It comprises a shell and a fire extinguishing system arranged in the shell, wherein a pressure relief mechanism for guiding the discharge of the fire extinguishing agent is arranged in the shell, and an anti-blocking mechanism for preventing the battery pack from reigniting is arranged in the shell;

[0007] The pressure relief mechanism includes a guide tube installed on the inner wall of the shell, a piston plate is arranged in the guide tube, a sealing gasket is arranged on the circumferential surface of the piston plate, and a toothed part for controlling the unidirectional movement of the piston plate is arranged between the guide tube and the piston plate, and a discharge port is arranged on one side of the guide tube outside the shell.

[0008] Furthermore, the locking tooth member includes a limiting groove arranged in the outlet pipe, a ratchet is arranged on the surface of the limiting groove, a groove is arranged in the piston plate, a first spring is arranged in the groove, and a trapezoidal block sliding on the ratchet surface is arranged at one end of the first spring.

[0009] Furthermore, the piston plate has a certain width, and the trapezoidal block is located in the limiting groove.

[0010] Furthermore, the anti-blocking mechanism includes an electric telescopic rod arranged in the shell, the end of the electric telescopic rod is provided with a slide plate for blocking the outlet pipe, and the outlet pipe is provided with a flow sensor electrically connected to the electric telescopic rod.

[0011] Furthermore, the slide plate is located above the outlet pipe on the inner wall of the shell, and the length of the slide plate is greater than the inner diameter of the outlet pipe.

[0012] Furthermore, two groups of concave grooves are provided in the shell, and a convex block sliding in the concave groove is provided on one side of the slide plate close to the concave groove.

[0013] By means of the above technical solution, the utility model provides an explosion-proof battery box shell, which has at least the following beneficial effects:

[0014] 1. Due to the setting of the pressure relief mechanism of the utility model, when the fire extinguishing system in the shell works, a large amount of fire extinguishing agent is generated, and a large amount of fire extinguishing agent fills the shell and squeezes the piston plate to move unidirectionally in the outlet pipe, so that a continuous flow of fire extinguishing agent moves to the outside of the shell through the outlet pipe, which is conducive to the fire extinguishing system to continuously spray out the fire extinguishing agent, thereby completely eliminating the fire source of the battery pack.

[0015] 2. Due to the setting of the anti-blocking mechanism, the utility model detects a large amount of fire extinguishing agent flowing in the outlet pipe through the flow sensor. Therefore, when the fire extinguishing system of the safety battery box stops spraying the fire extinguishing agent, it is immediately monitored and the movement of the electric telescopic rod is controlled to drive the slide plate to move, thereby blocking the outlet pipe, which is beneficial to block the remaining fire extinguishing agent in the shell, prevent the outside air from contacting the battery pack, and avoid the risk of re-ignition. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0017] In the attached picture:

[0018] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a partial structural schematic diagram of the utility model;

[0020] Figure 3 for Figure 2 An enlarged schematic diagram of structure A of the utility model;

[0021] Figure 4 It is a two-dimensional schematic diagram of part of the structure of the utility model.

[0022] In the figure: 1. shell; 2. fire extinguishing system; 3. pressure relief mechanism; 31. outlet pipe; 32. piston plate; 33. sealing gasket; 34. toothed member; 341. limit groove; 342. ratchet; 343. groove; 344. first spring; 345. trapezoidal block; 35. drain port; 4. anti-blocking mechanism; 41. electric telescopic rod; 42. slide plate; 43. flow sensor; 44. concave groove; 45. convex block. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] When the safety battery box is used and the battery pack inside it catches fire, the fire extinguishing system inside it will deliver fire extinguishing agent to the arc-shaped fire extinguishing nozzle. Under the action of the explosion-proof valve, the fire extinguishing agent will contact the fire point inside it. However, in the process of the explosion-proof valve spraying out the fire extinguishing agent, a large amount of fire extinguishing agent will quickly fill the shell and block the explosion-proof valve, making it impossible for the arc-shaped fire extinguishing nozzle to spray out a large amount of fire extinguishing agent to achieve the purpose of fire extinguishing, resulting in the inability to ensure the safety of users when using the safety battery box, which has certain safety hazards. Based on this, the following solution is provided.

[0025] Example 1

[0026] When a fire occurs in the battery pack in the safety battery box, the internal fire extinguishing system 2 will quickly spray out the fire extinguishing agent to extinguish the fire source in time and accurately. However, a large amount of fire extinguishing agent will occupy the safety battery box, resulting in the internal fire extinguishing system 2 being unable to spray out all the fire extinguishing agent smoothly, resulting in the fire source inside being unable to be completely extinguished. This embodiment provides an explosion-proof battery box shell, such as Figure 1-Figure 3 As shown, it includes a shell 1 and a fire extinguishing system 2 arranged in the shell 1. A pressure relief mechanism 3 for guiding the discharge of a fire extinguishing agent is provided in the shell 1, and an anti-blocking mechanism 4 for preventing the battery pack from reigniting is provided in the shell 1. When the battery pack in the shell 1 catches fire, the fire extinguishing system 2 therein will spray the fire extinguishing agent in the hollow pipe from the explosion-proof valve, and after spraying more fire extinguishing agent, a large amount of fire extinguishing agent fills the shell 1 and generates pressure on the pressure relief mechanism 3, so that the pressure relief mechanism 3 works to discharge the fire extinguishing agent in the shell 1, thereby ensuring that the explosion-proof valve can smoothly discharge a sufficient amount of fire extinguishing agent, and after the battery pack therein is extinguished, the anti-blocking mechanism 4 works to seal the remaining fire extinguishing agent in the shell 1 in the shell 1, thereby preventing air from contacting the battery pack and cutting off the possibility of the battery pack reigniting.

[0027] When the battery pack inside the safety battery box catches fire, a large amount of fire extinguishing agent will quickly fill the inside of the safety battery box. Due to the sealing design of the shell 1 of the safety battery box, the fire extinguishing system 2 cannot spray out all the fire extinguishing agent. The pressure relief mechanism 3 includes an outlet pipe 31 installed on the inner wall of the shell 1. A piston plate 32 is provided in the outlet pipe 31. A sealing gasket 33 is provided on the circumferential surface of the piston plate 32. A toothed member 34 for controlling the unidirectional movement of the piston plate 32 is provided between the outlet pipe 31 and the piston plate 32. The outlet pipe 31 is arranged on the inner wall of the shell 1. 1 is provided with a discharge port 35 on one side outside the shell 1. When the fire extinguishing system 2 in the shell 1 sprays out the fire extinguishing agent, a large amount of fire extinguishing agent squeezes the piston plate 32, so that the piston plate 32 moves along the outlet pipe 31, and under the action of the toothed member 34, the piston plate 32 moves to the end inside the outlet pipe 31, and a large amount of fire extinguishing agent moves from the discharge port 35 to the outside of the shell 1 through the outlet pipe 31, so that a large amount of fire extinguishing agent in the shell 1 can be discharged, and it is beneficial for the explosion-proof valve to continuously spray out the continuous fire extinguishing agent, so as to achieve the purpose of fire extinguishing.

[0028] Since the safety battery box is on fire, the temperature difference between the inside and the outside is large. In order to prevent the piston plate 32 from being affected by the internal and external air pressure, a toothed member 34 is provided to prevent the piston plate 32 from swinging in the outlet pipe 31. The toothed member 34 includes a limiting groove 341 provided in the outlet pipe 31. A ratchet 342 is provided on the surface of the limiting groove 341. A groove 343 is provided in the piston plate 32. A first spring 344 is provided in the groove 343. One end of the first spring 344 is provided with a trapezoidal block 345 that slides on the surface of the ratchet 342. When the fire extinguishing agent in the shell 1 enters the outlet pipe 31 and pushes the piston plate 32 to move, the piston plate 32 will drive the trapezoidal block 345 to slide on the surface of the ratchet 342. At the same time, the groove of the ratchet 342 can prevent the trapezoidal block 345 from moving in the opposite direction in the groove of the ratchet 342. In the process of movement of the piston plate 32, both sides of the trapezoidal block 345 are affected by the limiting groove 341, so that the piston plate 32 moves linearly along the surface of the ratchet 342.

[0029] The piston plate 32 has a certain width, and the trapezoidal block 345 is located in the limiting groove 341. Since a large amount of fire extinguishing agent pushes the piston plate 32 to move in the outlet pipe 31, when the width of the piston plate 32 is large, the piston plate 32 will not tilt in the outlet pipe 31, and the trapezoidal block 345 moves in the limiting groove 341 to ensure that the piston plate 32 will not rotate in the outlet pipe 31, causing the piston plate 32 to tilt, thereby preventing the fire extinguishing agent in the shell 1 from flowing out normally from the drain port 35.

[0030] Since the battery pack may still reignite when the fire extinguishing system 2 of the safety battery box successfully extinguishes the fire source of the battery pack, it is necessary to reduce the air concentration in the shell 1 and isolate the battery pack from the outside air. The anti-blocking mechanism 4 includes an electric telescopic rod 41 arranged in the shell 1, and a slide plate 42 for blocking the outlet pipe 31 is provided at the end of the electric telescopic rod 41. A flow sensor 43 electrically connected to the electric telescopic rod 41 is provided in the outlet pipe 31. When the fire extinguishing system 2 is continuously working and spraying the fire extinguishing agent, a large amount of fire extinguishing agent fluid flows in the outlet pipe 31, and the flow sensor 43 detects the flow speed of the fire extinguishing agent in the outlet pipe 31. When the speed of the fire extinguishing agent in the outlet pipe 31 slows down rapidly, the flow sensor 43 triggers the movement of the electric telescopic rod 41, so that the end of the electric telescopic rod 41 drives the slide plate 42 to move downward in the shell 1. At the same time, the slide plate 42 moves with one side of the outlet pipe 31 to block the outlet pipe 31, thereby blocking the fire extinguishing agent in the shell 1 in the shell 1, which is beneficial to reduce the contact between air and the power supply in the shell 1 and increase the possibility of re-ignition of the battery pack therein.

[0031] The slide plate 42 is located above the outlet pipe 31 on the inner wall of the shell 1, and the length of the slide plate 42 is greater than the inner diameter of the outlet pipe 31. Since the electric telescopic rod 41 drives the slide plate 42 to move and blocks the outlet pipe 31, when the length of the slide plate 42 is greater than the inner diameter of the outlet pipe 31, the slide plate 42 can completely block the outlet pipe 31 during the downward movement, which is beneficial to isolate the battery pack in the shell 1 from the outside air.

[0032] Example 2

[0033] When the slide plate 42 slides on the surface of the housing 1, the one side of the outlet pipe 31 in the housing 1 is blocked, and the guide rod on one side of the slide plate 42 is squeezed with the blocking block, which may cause the position of the slide plate 42 in the housing 1 to shift, and may cause the slide plate 42 to block the outlet pipe 31 incompletely. Based on Example 1, Figure 4 As shown, two groups of concave grooves 44 are provided in the shell 1, and a convex block 45 sliding in the concave groove 44 is provided on the side of the slide plate 42 close to the concave groove 44. When the slide plate 42 moves on the surface of the shell 1, the slide plate 42 drives the convex block 45 to slide in the concave groove 44, so that the slide plate 42 is in close contact with the shell 1 and one end of the outlet pipe 31 during the movement, thereby maintaining good airtightness therein, which is beneficial to isolating the battery pack therein from the air and reducing the possibility of re-ignition.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof battery box shell, comprising a shell (1) and a fire extinguishing system (2) arranged in the shell (1), characterized in that: The housing (1) is provided with a pressure relief mechanism (3) for guiding the discharge of the fire extinguishing agent, and the housing (1) is provided with an anti-blocking mechanism (4) for preventing the battery pack from reigniting; The pressure relief mechanism (3) comprises a discharge pipe (31) mounted on the inner wall of the housing (1), a piston plate (32) being arranged in the discharge pipe (31), a sealing gasket (33) being arranged on the circumferential surface of the piston plate (32), and a toothed member (34) for controlling the unidirectional movement of the piston plate (32) being arranged between the discharge pipe (31) and the piston plate (32), and a discharge port (35) being arranged on one side of the discharge pipe (31) outside the housing (1).

2. The explosion-proof battery case according to claim 1, characterized in that: The latching tooth member (34) comprises a limiting groove (341) arranged in the outlet pipe (31), a ratchet (342) being arranged on the surface of the limiting groove (341), a groove (343) being arranged in the piston plate (32), a first spring (344) being arranged in the groove (343), and a trapezoidal block (345) sliding on the surface of the ratchet (342) being arranged at one end of the first spring (344).

3. The explosion-proof battery case according to claim 2, characterized in that: The piston plate (32) has a certain width, and the trapezoidal block (345) is located in the limiting groove (341).

4. The explosion-proof battery box shell according to claim 1, characterized in that: The anti-blocking mechanism (4) comprises an electric telescopic rod (41) arranged in the housing (1), a slide plate (42) for blocking the outlet pipe (31) is provided at the end of the electric telescopic rod (41), and a flow sensor (43) electrically connected to the electric telescopic rod (41) is provided in the outlet pipe (31).

5. The explosion-proof battery case according to claim 4, characterized in that: The slide plate (42) is located above the outlet pipe (31) on the inner wall of the housing (1), and the length of the slide plate (42) is greater than the inner diameter of the outlet pipe (31).

6. The explosion-proof battery case according to claim 4, characterized in that: Two groups of concave grooves (44) are arranged in the housing (1), and a convex block (45) sliding in the concave groove (44) is arranged on one side of the slide plate (42) close to the concave groove (44).

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