CN209910920U - A device for detecting battery leakage - Google Patents

Abstract

A device for detecting battery liquid leakage, comprising a rack, on which is provided a sealed cavity for placing a battery to be detected, a test instrument for detecting VOC concentration, an air extraction component for extracting gas from the sealed cavity, and A delivery pipeline, the delivery pipeline includes a delivery pipeline 1 for delivering external air to the sealed cavity, a delivery pipeline 2 for delivering the gas in the sealed cavity to the testing instrument, and a delivery pipeline connected with delivery pipeline 1 and delivery pipeline 2 three. The utility model can quickly determine whether the battery leaks, with high safety and high reliability of the detection result; if the battery leaks, the air extraction component can form a negative pressure in the sealed cavity and extract the VOC gas, and once the delivery pipeline is injected with clean air, the The sealed cavity reaches normal pressure, and the VOC gas passes through the second delivery pipeline to the testing instrument for detection. The third delivery pipeline is set to improve the safety of the device and avoid accidents.

Description

A device for detecting battery leakage

technical field

The utility model relates to the field of battery detection, in particular to a device for detecting battery leakage.

Background technique

In the production process of lithium-ion batteries, it is necessary to detect whether the battery leaks or not. The leaking battery is not only a defective product, but also has a huge safety hazard. However, the existing equipment has poor detection reliability and cannot detect whether the battery leaks or not. Fast and efficient detection. In addition, the battery module is composed of multiple or dozens of batteries. If the battery leaks in the battery module, the battery module needs to be unpacked and tested one by one. The process is cumbersome and time-consuming. Leakage detection is performed on a single battery before assembly to improve the reliability of leak detection, and the detection device itself should have certain safety.

Utility model content

In order to overcome the problems of poor reliability, slow detection speed, low safety, etc. of existing devices for detecting battery liquid leakage, the utility model provides a device for detecting battery liquid leakage.

A device for detecting battery liquid leakage, comprising a rack, on which is provided a sealed cavity for placing a battery to be detected, a test instrument for detecting VOC concentration, an air extraction component for extracting gas from the sealed cavity, and A delivery pipeline, the delivery pipeline includes a delivery pipeline 1 for delivering external air to the sealed cavity, a delivery pipeline 2 for delivering the gas in the sealed cavity to the testing instrument, and a delivery pipeline connected with delivery pipeline 1 and delivery pipeline 2 three.

Preferably, the first conveying pipeline includes an intake pressure regulating valve, a primary filter, a secondary filter, a pressure regulating valve and a check valve 1 connected in sequence, and the first check valve is connected to the sealing cavity. connect.

Preferably, the primary filter adopts a fine activated carbon filter element, and the secondary filter adopts a superfine activated carbon filter element.

Preferably, the second delivery pipeline includes a second check valve disposed between the sealing cavity and the testing instrument.

Preferably, the air extraction assembly includes a vacuum pump and an air extraction check valve connected to the vacuum pump, and the air extraction check valve is connected to the sealing cavity.

Preferably, the transportation pipeline 3 includes a pressure regulating valve 3, an electric proportional valve 3 and a check valve 3 connected in sequence, and the pressure regulating valve 3 is arranged between the secondary filter and the pressure regulating valve 1, so The said check valve 3 is connected with the test instrument.

Preferably, a transportation pipeline 4 is connected between the transportation pipeline 1 and the transportation pipeline 3, and the transportation pipeline 4 includes a check valve 4 and an electrical proportional valve 4. Between the first valve and the sealing cavity, the fourth electric proportional valve is connected between the third pressure regulating valve and the third electric proportional valve.

Preferably, the transportation pipeline 3 includes a pressure regulating valve 3, an electric proportional valve 3 and a check valve 3 in sequence, and the pressure regulating valve 3 is arranged between the check valve 1 and the sealing cavity. The return valve three is connected with the test instrument.

Preferably, the sealed cavity includes an upper cavity and a lower cavity below it, the upper cavity is provided with an upper cylinder that drives the upper cavity to move vertically, and the lower cavity is provided with a drive The lower cylinder moves vertically with the lower chamber.

Preferably, one side of the sealed cavity is provided with a negative pressure gauge for detecting the air pressure in the sealed cavity.

The utility model provides a device for detecting battery leakage, the device can quickly determine whether the battery leaks, has high safety, fast detection speed, and high reliability of detection results; if the battery leaks, the air extraction component can seal the cavity Negative pressure is formed in the body and VOC gas is extracted. The first delivery pipeline injects clean air to make the sealed cavity reach normal pressure. The VOC gas passes through the second delivery pipeline to the testing instrument for detection. The third delivery pipeline is set to improve the safety of the device, avoid accidents and ensure The process of steadily changing from negative pressure to normal pressure in the sealed cavity.

Description of drawings

Fig. 1 is the overall structure schematic diagram one of the present utility model;

Fig. 2 is the structural representation two of the utility model;

3 is a schematic diagram of a conveying pipeline in Embodiment 1 of the present utility model;

FIG. 4 is a schematic diagram one of the conveying pipeline of Embodiment 2 of the present utility model;

Fig. 5 is the schematic diagram two of the conveying pipeline of the utility model embodiment 2;

FIG. 6 is a schematic diagram of a conveying pipeline according to Embodiment 3 of the present invention.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and embodiments.

Embodiment 1: Referring to Figures 1 to 3, a device for detecting battery leakage includes a rack 1, the rack 1 is provided with a sealed cavity 2 for placing the battery to be detected, and a test instrument for detecting VOC concentration 3. An air extraction component and a conveying pipe 5 for pumping gas from the sealed cavity 2. The conveying pipe 5 includes a conveying pipe 6 for conveying the external air into the sealed cavity 2, and the gas in the sealed cavity 2 is conveyed Conveying pipe 2 7 to the testing instrument, and conveying pipe 3 8 communicating with conveying pipe one 6 and conveying pipe two 7; the sealing cavity 2 includes an upper cavity 21 and a lower cavity 22 below it, and the upper cavity 21 is on the upper There is an upper cylinder 23 that drives the upper chamber to move vertically, and a lower cylinder that drives the lower chamber to move vertically below the lower chamber 22. The upper cylinder 23 and the lower cylinder are each provided with a solenoid valve 11; one side of the sealing chamber 2 is provided with There is a negative pressure gauge 10 for detecting the air pressure in the sealed cavity; the air extraction component includes a vacuum pump 41 and an air extraction check valve 42 connected with the vacuum pump, and the air extraction check valve 42 is connected with the sealing cavity 2 .

Conveying pipeline one 6 includes an intake pressure regulating valve 61 , a primary filter 62 , a secondary filter 63 , a pressure regulating valve 64 and a check valve 1 65 connected in sequence, and the check valve 1 65 is connected to the sealing cavity 2 , the primary filter 62 adopts a fine activated carbon filter element, and the secondary filter 63 adopts a superfine activated carbon filter element; the conveying pipeline two 7 includes a check valve two 71 arranged between the sealing cavity 2 and the testing instrument 3; the conveying pipeline three 8 It includes pressure regulating valve 3 81, electrical proportional valve 3 82 and check valve 3 83 connected in sequence. Pressure regulating valve 3 81 is arranged between the secondary filter 63 and pressure regulating valve 1 64. Instrument 3 is connected. Among them, pressure regulating valve 1, pressure regulating valve 3 and electric proportional valve 3 adopt FSETO brand.

The utility model places the battery to be tested in the lower cavity 22, the upper cylinder 23 and the lower cylinder work, the upper cavity 21 and the lower cavity 22 are closed to form a sealed cavity 2, and the vacuum pump 41 draws out the air in the sealed cavity 2, A negative pressure is formed in the sealed cavity 2. When the battery leaks, the leaked gas is extracted into the sealed cavity 2 at the same time, and then the compressed air is injected into the sealed cavity 2 through the conveying pipeline 1. At normal pressure, at this time, the air in the sealed cavity 2 can enter the test instrument 3 through the conveying pipe 2 7, and the test instrument 3 is connected to conduct the battery leakage test.

The test instrument 3 can only be tested under normal pressure, and the electrolyte after battery leakage can only be extracted under high negative pressure conditions, so the transmission pipeline 5 is very critical, and the transmission pipeline 38 is connected between the transmission pipeline 1 and 6 Between two and seven, the conveying pipeline 5 and the sealing cavity 2 can be brought to normal pressure stably and quickly, avoiding accidents and improving the safety of the whole device. The electric proportional valve controls the pressure in the pipeline, and the test instrument 3 is only under normal pressure. into the sealed cavity.

Embodiment 2: Referring to Figures 4 to 5, this embodiment is basically the same as Embodiment 1, except that a conveying pipe 9 is also connected between the conveying pipe one 6 and the conveying pipe three 8. The conveying pipe Four 9 includes check valve four 91 and electrical proportional valve four 92, check valve four 91 is connected between check valve one 65 and sealing cavity 2 body, electrical proportional valve four 92 is connected to pressure regulating valve three 81 and electrical proportional Between valve three and 82.

Embodiment 3: Referring to FIG. 5, this embodiment is basically the same as Embodiment 1, the difference is: the transportation pipeline 3 8 includes a pressure regulating valve 3 81, an electrical proportional valve 3 82 and a check valve 3 83 in turn. The third valve 81 is arranged between the first check valve 65 and the sealing cavity 2 , and the third check valve 83 is connected with the testing instrument 3 .

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still The technical solutions described in the embodiments are modified, or some technical features thereof are equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this implementation are included in the protection scope of the present invention.

Claims (10)

1. A device for detecting battery leakage, comprising a rack (1), characterized in that: the rack (1) is provided with a sealed cavity (2) for placing a battery to be detected, a test for detecting VOC concentration An instrument (3), an air extraction component for pumping gas from the sealed cavity (2), and a conveying pipe (5), the conveying pipe (5) comprising a Conveying pipe one (6), conveying pipe two (7) for conveying the gas in the sealed cavity (2) to the testing instrument, and conveying pipe three (7) communicating with the conveying pipe one (6) and the two (7) conveying pipes 8). 2 . The device for detecting battery liquid leakage according to claim 1 , wherein the first (6) conveying pipeline comprises an air intake pressure regulating valve (61) and a primary filter (62) which are connected in sequence. 3 . ), a secondary filter (63), a pressure regulating valve (64) and a check valve (65), the check valve one (65) is connected to the sealing cavity (2). 3. A device for detecting battery liquid leakage according to claim 2, characterized in that: the primary filter (62) adopts a fine activated carbon filter element, and the secondary filter (63) adopts a superfine filter Activated carbon filter. 4. A device for detecting battery liquid leakage according to claim 1, characterized in that: the second conveying pipeline (7) comprises a stopper disposed between the sealing cavity (2) and the testing instrument (3). Return valve two (71). 5 . The device for detecting battery liquid leakage according to claim 1 , wherein the air extraction component comprises a vacuum pump ( 41 ) and an air extraction check valve ( 42 ) connected to the vacuum pump ( 41 ). 6 . The air extraction check valve (42) is connected with the sealing cavity (2). 6. A device for detecting battery liquid leakage according to claim 2, characterized in that the three (8) conveying pipelines comprise three (81) pressure regulating valves and three (82) electrical proportional valves which are connected in sequence. And check valve three (83), the pressure regulating valve three (81) is arranged between the secondary filter (63) and the pressure regulating valve one (64), the check valve three (83) and The test instrument (3) is connected. 7. A device for detecting battery liquid leakage according to claim 6, characterized in that: the first (6) and the third (8) transportation pipelines are connected with the fourth (9) transportation pipelines, so Said delivery pipeline four (9) includes check valve four (91) and electrical proportional valve four (92), said check valve four (91) is connected to check valve one (65) and sealing cavity (2) ), the electrical proportional valve four (92) is connected between the pressure regulating valve three (81) and the electrical proportional valve three (82). 8 . The device for detecting battery liquid leakage according to claim 2 , wherein the three (8) conveying pipelines comprise a pressure regulating valve three (81) and an electrical proportional valve three (82) connected in sequence. 9 . And check valve three (83), the pressure regulating valve three (81) is set between the check valve one (65) and the sealing cavity (2), the check valve three (83) and the test Instrument (3) is connected. 9 . The device for detecting battery liquid leakage according to claim 1 , wherein the sealed cavity ( 2 ) comprises an upper cavity ( 21 ) and a lower cavity ( 22 ) below it, so the The upper cavity (21) is provided with an upper cylinder (23) that drives the upper cavity to move vertically, and a lower cylinder that drives the lower cavity to move vertically is arranged below the lower cavity (22). 10 . The device for detecting battery liquid leakage according to claim 1 , wherein a negative pressure gauge ( 10 ) for detecting the air pressure in the sealed cavity is provided on one side of the sealed cavity ( 2 ). 11 .

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