Explosion-proof pressure relief structure of battery box

Abstract

The utility model relates to the technical field of battery boxes, in particular to an anti-explosion pressure relief structure of a battery box, which comprises the battery box and a breather valve mounted on an air outlet of the battery box, the breather valve consists of a valve casing mounted on the air outlet and a sealing plug slidably arranged in the valve casing, an air relief port is arranged on the side wall of the valve casing, and the air relief port is communicated with the air relief port. An extension plate is fixed to the side edge of the sealing plug and slides in the gas release opening, an alarm sensor is fixed to the side wall of the valve shell and used for detecting the position of the extension plate, and if a fire occurs in the battery box, generated gas can be greatly increased, and the impact force of the gas pushes the sealing plug to move, the extension plate can slide in the gas release opening. The extension plate is enabled to rapidly approach the alarm sensor, and the alarm sensor detects the rapid approaching of the extension plate and gives an alarm.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery box technical field, specifically point to a kind of explosion-proof pressure relief structure of battery box. BACKGROUND

[0002] Battery generates heat and gas in the process of charging and discharging, if gas cannot be discharged in time, when internal gas pressure reaches a certain value, it is possible to produce burst, therefore, through the battery breather valve installed on battery box, gas is discharged.

[0003] At present, the breather valve on the battery box only has pressure relief function, and cannot monitor the pressure relief amount. If the battery catches fire, the amount of gas discharged will increase significantly. Therefore, the present application provides an explosion-proof pressure relief structure for a battery box, which can monitor the pressure relief situation while pressure relief and promptly detect abnormal pressure relief. UTILITY MODEL CONTENTS

[0004] The utility model aims at least solve the problem of effective monitoring of the pressure relief situation of battery box in the prior art.

[0005] The present application provides an explosion-proof pressure relief structure for a battery box, which is achieved by the following technical means: including battery box and breather valve installed on the gas outlet of battery box, the breather valve is composed of valve shell installed on the gas outlet and blocking plug slidingly arranged in the valve shell, the blocking plug intermittently blocks the port connecting the valve shell and the gas outlet, the blocking plug and the top wall of the valve shell are connected with an elastic extrusion piece, the side wall of the valve shell is provided with a gas vent, the side edge of the blocking plug is fixed with an extension plate, the extension plate slides in the gas vent, the side wall of the valve shell is fixed with an alarm sensor, if a fire occurs in the battery box, the generated gas will increase significantly, so that the extension plate quickly approaches the alarm sensor, and the alarm sensor sends an alarm.

[0006] Preferred technical solution one: the valve shell is fixed with a protective cover, the protective cover covers the gas vent, the alarm sensor is installed on the protective cover, and a filter is also installed on the protective cover.

[0007] Preferred technical solution two: the elastic extrusion piece includes an adjusting plate arranged in the valve shell, a plug rod fixed on the blocking plug is slidingly inserted into a hole provided in the adjusting plate, and a pressure spring is connected between the adjusting plate and the blocking plug.

[0008] Preferred technical solution three: the adjusting plate slides in the valve shell, and a pressure adjusting assembly is also arranged in the valve shell, which is used to adjust the position of the adjusting plate in the valve shell.

[0009] Preferably, the pressure adjusting assembly comprises an outer threaded cylinder fixed on the adjusting plate, the plug rod is inserted into the outer threaded cylinder after sliding out of the hole on the adjusting plate, and an inner threaded cylinder is arranged on the top wall of the valve shell and penetrates the top wall.

[0010] Preferably, the valve shell comprises a bottom shell fixed on the air outlet and a top cover threadedly connected with the bottom shell, and the plug and the adjusting plate are both arranged in the bottom shell and slide through the top cover.

[0011] The above structure makes the present application have the following beneficial effects:

[0012] 1. The breathing valve on the battery box not only has the conventional function of pressure relief, but also can monitor the pressure relief. If fire or explosion occurs in the battery box, more gas than in the normal charging and discharging state will be generated to push the extension plate to move on the air outlet and approach the alarm sensor, and the alarm sensor will send an alarm.

[0013] 2. The filter installed on the air outlet can filter and absorb harmful components in the gas during pressure relief, avoiding air pollution.

[0014] 3. The pressure adjusting assembly can adjust the pressure relief pressure of the plug, and the corresponding pressure relief pressure can be adjusted according to different specifications of the battery, ensuring the universality of the breathing valve. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application and explain the principles of the present application, and do not constitute a limitation of the present application. In the drawings:

[0016] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0017] Figure 2 It is a schematic diagram of the structure of the breathing valve of the present application;

[0018] Figure 3 It is an explosion view of the breathing valve of the present application;

[0019] Figure 4 It is a sectional view of the breathing valve of the present application.

[0020] 1. battery box, 2. breathing valve, 21. valve shell, 211. bottom shell, 212. top cover, 213. air outlet, 22. plug, 23. extension plate, 24. alarm sensor, 241. proximity sensor, 5. protective cover, 6. filter, 7. elastic extrusion piece, 71. adjusting plate, 72. plug rod, 73. pressure spring, 8. pressure adjusting assembly, 81. outer threaded cylinder, 82. inner threaded cylinder. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the protection scope of the utility model.

[0022] Please refer to Figures 1-4 , the explosion-proof pressure relief structure of battery box, including battery box 1 and install on the battery box 1 outlet valve 2, the valve 2 is installed on the outlet valve housing 21 and the sliding in the valve housing 21 block plug 22, block plug 22 intermittently to the port of valve housing 21 and outlet communication is blocked, block plug 22 and the elastic extrusion piece 7 between the top wall of valve housing 21 is connected, the elastic extrusion piece 7 includes the adjusting plate 71 in the valve housing 21, the plug rod 72 fixed on block plug 22 is slidably inserted into the hole in the adjusting plate 71, the adjusting plate 71 and block plug 22 are connected with pressure spring 73, the elastic extrusion of block plug 22 is realized by the elastic force of pressure spring 73, the vent 213 is opened on the side wall of valve housing 21, the extension plate 23 is fixed on the side of block plug 22, the extension plate 23 is slid in the vent 213, the alarm sensor 24 (using prior art) is fixed on the side wall of valve housing 21, the alarm sensor 24 is used to detect the position of extension plate 23, if the fire occurs in the battery box 1, the gas generated will increase a lot, the impact force of gas pushes block plug 22 to move more than the normal distance, so that the extension plate 23 quickly approaches the alarm sensor 24, the proximity sensor 241 is arranged in the alarm sensor 24, the proximity sensor 241 is opposite to the extension plate 23, which is used to detect the distance between the extension plate 23 and the proximity sensor 241, when the proximity sensor 241 detects that the extension plate 23 is too close, the alarm sensor 24 is started to alarm.

[0023] Please refer to Figures 3-4 , the explosion-proof pressure relief structure of battery box, the valve housing 21 is fixed with the protective cover 5, the protective cover 5 is covered on the vent 213, the alarm sensor 24 is installed on the protective cover 5, the filter 6 (using prior art) is also installed on the protective cover 5 at the same time, the filter 6 is used to filter the harmful components in the gas discharged from the outlet.

[0024] Please refer to Figures 3-4, the explosion-proof pressure relief structure of the battery box, the adjusting plate 71 slides in the valve shell 21, and a pressure adjusting assembly 8 is also arranged in the valve shell 21, the pressure adjusting assembly 8 is used for adjusting the position of the adjusting plate 71 in the valve shell 21, the pressure adjusting assembly 8 comprises an outer threaded cylinder 81 fixed on the adjusting plate 71, the plug rod 72 is inserted into the outer threaded cylinder 81 after extending from the hole on the adjusting plate 71, an inner threaded cylinder 82 is rotatably penetrated on the top wall of the valve shell 21, the outer threaded cylinder 81 is inserted into the inner threaded cylinder 82, the technical effect that the length of the outer threaded cylinder 81 extending out of the inner threaded cylinder 82 is adjusted when the inner threaded cylinder 82 is screwed is realized by the threaded connection between the two, so that the position of the adjusting plate 71 is adjusted, and then the initial pressure between the pressure spring 73 and the blocking plug 22 is adjusted, so that the pressure relief pressure is adjusted.

[0025] Please refer to Figures 2-4 , the explosion-proof pressure relief structure of the battery box, the valve shell 21 is composed of a bottom shell 211 fixed on the gas outlet and a top cover 212 threadedly connected with the bottom shell 211, the blocking plug 22 and the adjusting plate 71 are both arranged in the bottom shell 211, and the inner threaded cylinder 82 is slidably penetrated through the top cover 212, the bottom shell 211 is threadedly connected with the gas outlet of the battery box 1, so that the disassembly and assembly are facilitated.

[0026] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof pressure relief structure for a battery box, comprising a battery box (1) and a breather valve (2) installed on the air outlet of the battery box (1), wherein the breather valve (2) consists of a valve housing (21) installed on the air outlet and a sealing plug (22) slidably disposed within the valve housing (21), characterized in that: An elastic extrusion member (7) is connected between the sealing plug (22) and the top wall of the valve body (21). A vent (213) is provided on the side wall of the valve body (21). An extension plate (23) is fixed on the side of the sealing plug (22). The extension plate (23) slides in the vent (213). An alarm sensor (24) is fixed on the side wall of the valve body (21). The alarm sensor (24) is used to detect the position of the extension plate (23).

2. The explosion-proof pressure relief structure for a battery box according to claim 1, characterized in that: A protective cover (5) is fixed on the valve housing (21), the protective cover (5) covers the vent (213), the alarm sensor (24) is installed on the protective cover (5), and a filter (6) is also installed on the protective cover (5).

3. The explosion-proof pressure relief structure for a battery box according to claim 1, characterized in that: The elastic compression member (7) includes an adjusting plate (71) disposed in the valve housing (21), a plug rod (72) fixed on the sealing plug (22) is slidably inserted into a hole opened on the adjusting plate (71), and a pressure spring (73) is connected between the adjusting plate (71) and the sealing plug (22).

4. The explosion-proof pressure relief structure for a battery box according to claim 3, characterized in that: The adjusting plate (71) slides within the valve housing (21), and a pressure adjusting component (8) is also provided within the valve housing (21). The pressure adjusting component (8) is used to adjust the position of the adjusting plate (71) within the valve housing (21).

5. The explosion-proof pressure relief structure for a battery box according to claim 4, characterized in that: The pressure regulating assembly (8) includes an external threaded cylinder (81) fixed on the regulating plate (71). The plug rod (72) extends out of the hole on the regulating plate (71) and slides into the external threaded cylinder (81). An internal threaded cylinder (82) is rotatably provided on the top wall of the valve body (21). The external threaded cylinder (81) is inserted into the internal threaded cylinder (82).

6. The explosion-proof pressure relief structure for a battery box according to claim 5, characterized in that: The valve housing (21) consists of a bottom shell (211) fixed on the air outlet and a top cover (212) threadedly connected to the bottom shell (211). The sealing plug (22) and the adjusting plate (71) are slidably disposed in the bottom shell (211), while the internal threaded cylinder (82) slides through the top cover (212).

7. The explosion-proof pressure relief structure for a battery box according to claim 6, characterized in that: The bottom shell (211) is threadedly connected to the air outlet of the battery box (1).

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