Gas leakage detection device

Abstract

The utility model relates to the technical field of detection devices, in particular to a gas leakage detection device which comprises a test board, a supporting frame is fixedly installed at the top of the test board, a cylinder is fixedly installed at the top of the supporting frame, and an upper pressing plate is fixedly installed at the driving end of the cylinder and located on the inner side of the supporting frame. A placement table is installed at the top of the test table and located below the upper pressing plate, a battery shell is installed between the upper pressing plate and the placement table, a water drainage cover is fixedly installed at the top of the test table and located on the outer side of the supporting frame, and an air tightness tester is installed on the left side of the test table; compared with an existing battery shell gas leakage detection mode, the battery shell gas leakage detection device has the advantages that the specific gas leakage position can be known through the design, so that a specific solution is obtained, and the reliability and the accuracy of gas leakage detection are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of detection devices, in particular to a gas leakage detection device. Background Art

[0002] After the battery shell is produced, it is necessary to conduct gas leakage detection to ensure that the internal airtightness of the battery shell meets the standard requirements. The battery shell gas leakage detection method generally adopts the vacuum detection method, and there is also a pressure detection method. The specific methods are as follows:

[0003] 1. Vacuum test: Use an air pump to vacuum the inside of the battery shell to a specified pressure. If there are no defects on the surface of the battery shell, it will be able to maintain this vacuum state for a certain period of time; 2. Pressure test: Fill the battery shell with a certain gas pressure. If there are no defects on the surface of the battery shell at this time, the pressure inside the battery shell will be maintained at a predetermined pressure value for a certain period of time;

[0004] The above two methods require an external air tightness tester to obtain specific test data. Although it is possible to know in time whether there is leakage in the battery shell, the specific leakage location of the battery shell is unknown, and a specific solution cannot be obtained, which greatly reduces the reliability and accuracy of gas leakage detection.

[0005] Therefore, it is particularly important to design a gas leakage detection device to solve the above-mentioned defects. Utility Model Content

[0006] In view of the shortcomings of the prior art, the utility model designs a gas leakage detection device, which aims to solve the problem of the method of performing gas leakage detection on the battery shell under the prior art. Although it is possible to know in time whether there is a leakage in the battery shell, the specific leakage location of the battery shell is unknown and a specific solution cannot be obtained, which greatly reduces the technical problem of the reliability and accuracy of gas leakage detection.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A gas leakage detection device comprises a test bench, a support frame is fixedly installed on the top of the test bench, a cylinder is fixedly installed on the top of the support frame, an upper pressure plate is fixedly installed on the driving end of the cylinder and located on the inner side of the support frame, a placing table is installed on the top of the test bench and below the upper pressure plate, a battery shell is installed between the upper pressure plate and the placing table, a water drain cover is fixedly installed on the top of the test bench and located on the outer side of the support frame, an air tightness tester is installed on the left side of the test bench, and an air pump is fixedly installed on the top of the air tightness tester.

[0009] As a preferred solution of the utility model, a plurality of groups of operating buttons are installed on the front of the test bench, and the operating buttons are electrically connected to the air tightness tester, the air pump and the air cylinder. The left and right sides of the test bench are rotatably connected with handles.

[0010] As a preferred solution of the utility model, sliding rods are fixedly connected at the four corners of the top of the upper pressure plate, and the four groups of sliding rods are slidably connected to the support frame through sliding sleeves. Two groups of positioning rods are fixedly connected to the bottom of the upper pressure plate and on the left and right sides of the battery shell.

[0011] As a preferred solution of the utility model, a transparent observation cover is fixedly connected to the interior of the upper pressing plate, and a collection cover is fixedly connected to the bottom of the transparent observation cover.

[0012] As a preferred solution of the utility model, the left and right ends of the bottom of the placement table are fixedly connected with a slide seat, the slide seat is slidably connected to the test bench through a slide rail, a sealing groove is opened on the top of the placement table, and a rubber sealing ring is fixedly connected to the inner side of the sealing groove and located at the bottom of the battery shell.

[0013] As a preferred solution of the utility model, a connecting head and an exhaust head are fixedly connected to the front of the placement table, and the connecting head and the exhaust head are both connected to the inner side of the sealing groove, the connecting head is connected to the air tightness tester through a first connecting hose, and the exhaust head is connected to the air pump through a second connecting hose.

[0014] As a preferred solution of the utility model, a water baffle is fixedly connected to the front of the drain cover, a drain pipe is fixedly connected to the left side of the drain cover, a liquid level window is fixedly installed on the front of the water baffle, and multiple groups of observation windows are fixedly installed on the outside of the drain cover.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model is designed to place the battery shell on the placing table and then use the upper pressure plate to press and fix it, then start the air pump to fill the inner side of the sealing groove with a certain gas pressure, if the pressure inside the battery shell is maintained at a predetermined pressure value for a certain period of time, it is a good product, if the pressure value continues to decrease, it is a defective product, then water is poured into the inner side of the water drain cover until the water submerges the upper pressure plate, then the direction of the bubbles rising in the transparent observation cover is observed to observe which side of the battery shell the bubbles are leaking from, then the leakage point of the bubbles is specifically observed, so as to know the specific leakage position of the battery shell, and then obtain a specific solution for improvement, the whole operation process is simple and convenient, compared with the existing battery shell gas leakage detection method, the utility model can know the specific leakage position of the gas through design, so as to obtain a specific solution, which greatly improves the reliability and accuracy of gas leakage detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a three-dimensional schematic diagram of part of the structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the inner structure of the sealing groove of the utility model;

[0020] Figure 4 for Figure 3 A magnified schematic diagram of the middle part;

[0021] Figure 5 It is a partial structural front view of the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the transparent observation cover of the utility model.

[0023] In the figure: 1. test bench; 101. operation button; 102. handle; 2. support frame; 3. cylinder; 4. upper pressure plate; 401. slide bar; 402. sleeve; 403. positioning rod; 404. transparent observation cover; 405. collection cover; 5. placement table; 501. slide seat; 502. slide rail; 503. sealing groove; 504. rubber sealing ring; 505. connector; 506. exhaust head; 507. first connecting hose; 508. second connecting hose; 6. battery shell; 7. drain cover; 701. water baffle; 702. drain pipe; 703. liquid level window; 704. observation window; 8. air tightness tester; 9. air pump. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] Example:

[0026] See also Figure 1-Figure 6 , the utility model provides a technical solution:

[0027] A gas leakage detection device includes a test bench 1, a support frame 2 is fixedly installed on the top of the test bench 1, a cylinder 3 is fixedly installed on the top of the support frame 2, an upper pressure plate 4 is fixedly installed on the driving end of the cylinder 3 and located on the inner side of the support frame 2, a placement table 5 is installed on the top of the test bench 1 and below the upper pressure plate 4, a battery shell 6 is installed between the upper pressure plate 4 and the placement table 5, a water drain cover 7 is fixedly installed on the top of the test bench 1 and located on the outer side of the support frame 2, an airtightness tester 8 is installed on the left side of the test bench 1, and an air pump 9 is fixedly installed on the top of the airtightness tester 8.

[0028] First, a plurality of operating buttons 101 are installed on the front of the test bench 1. The operating buttons 101 are electrically connected to the air tightness tester 8, the air pump 9 and the air cylinder 3. The left and right sides of the test bench 1 are rotatably connected with handles 102. The air tightness tester 8, the air pump 9 and the air cylinder 3 can be switched on and off by the operating buttons 101, and the test bench 1 can be carried by the handles 102.

[0029] Furthermore, sliding rods 401 are fixedly connected at the four corners of the top of the upper pressure plate 4, and the four groups of sliding rods 401 are slidably connected to the support frame 2 through sliding sleeves 402. Two groups of positioning rods 403 are fixedly connected to the bottom of the upper pressure plate 4 and on the left and right sides of the battery shell 6. When the cylinder 3 drives the upper pressure plate 4 to press down, the upper pressure plate 4 is stably pressed down under the connection between the sliding rods 401 and the sliding sleeves 402. At the same time, the battery shell 6 is pressed and fixed after the upper pressure plate 4 is pressed down. At the same time, the left and right sides of the battery shell 6 are positioned and fixed by the positioning rods 403, and the bottom end of the positioning rods 403 presses and fixes the edge of the bottom end of the battery shell 6 to ensure the sealing of the edge during inspection of the battery shell 6.

[0030] Then, a transparent observation cover 404 is fixedly connected to the inside of the upper pressure plate 4, and a collecting cover 405 is fixedly connected to the bottom of the transparent observation cover 404. When performing gas leakage detection, water is poured into the inner side of the water drain cover 7 to observe the gas leakage. If the air tightness of the battery shell 6 is poor, after the gas leaks from the edge of the bottom end of the battery shell 6, the bubbles rise upward and are collected by the collecting cover 405. Then, the direction of the rising bubbles in the transparent observation cover 404 is used to observe which side of the battery shell 6 the bubbles are leaking from. Then, the leakage point of the bubbles is specifically observed, so as to know the specific leakage position of the battery shell 6, and then a specific solution is obtained for improvement, which greatly improves the reliability and accuracy of gas leakage detection.

[0031] Furthermore, the left and right ends of the bottom of the placement table 5 are fixedly connected with a slide seat 501, and the slide seat 501 is slidably connected to the test table 1 through a slide rail 502. A sealing groove 503 is opened on the top of the placement table 5, and a rubber sealing ring 504 is fixedly connected to the inner side of the sealing groove 503 and located at the bottom of the battery shell 6. When the battery shell 6 is tested for gas leakage, the placement table 5 is first slid forward through the cooperation of the slide seat 501 and the slide rail 502, so that it is moved out from the inner side of the support frame 2 to facilitate the placement of the battery shell 6, and the edge of the bottom end of the battery shell 6 is placed into the top of the rubber sealing ring 504 in the sealing groove 503, which is not only convenient for positioning and placement, but also can ensure the sealing during gas leakage detection. After the battery shell 6 is placed, the placement table 5 is pushed into the inner side of the support frame 2 for gas leakage detection.

[0032] Secondly, a connector 505 and an exhaust head 506 are fixedly connected to the front of the placement table 5, and both the connector 505 and the exhaust head 506 are connected to the inner side of the sealing groove 503. The connector 505 is connected to the air tightness tester 8 through a first connecting hose 507, and the exhaust head 506 is connected to the air pump 9 through a second connecting hose 508. After the battery shell 6 is pressed and fixed by the upper pressure plate 4, the air pump 9 is started to fill the inner side of the sealing groove 503 with a certain gas pressure. If the pressure inside the battery shell 6 is maintained at a predetermined pressure value for a certain period of time, it is a good product. If the pressure value continues to decrease, it is a defective product. Then, water is poured into the inner side of the water drain cover 7 until the water submerges the upper pressure plate 4. Then, the specific gas leakage point is observed to obtain a specific solution.

[0033] Finally, a water baffle 701 is fixedly connected to the front of the drain hood 7, a drain pipe 702 is fixedly connected to the left side of the drain hood 7, a liquid level window 703 is fixedly installed on the front of the water baffle 701, and multiple groups of observation windows 704 are fixedly installed on the outer side of the drain hood 7. Water is filled through the water baffle 701, and the water is drained through the drain pipe 702 after the subsequent inspection is completed. During the water filling process, the water level can be observed and controlled through the liquid level window 703, and during the test, the gas leakage can be observed through the multiple groups of observation windows 704 to obtain the specific gas leakage point.

[0034] In this embodiment, the implementation scenario is specifically as follows: when the battery shell 6 is tested for gas leakage, the placement table 5 is first slid forward by the cooperation of the slide seat 501 and the slide rail 502, so that it is moved out from the inner side of the support frame 2 to facilitate the placement of the battery shell 6, and the edge of the bottom end of the battery shell 6 is placed into the top of the rubber sealing ring 504 in the sealing groove 503, which is not only convenient for positioning and placement, but also can ensure the sealing during gas leakage detection. After the battery shell 6 is placed, the placement table 5 is pushed into the inner side of the support frame 2 for gas leakage detection, and the cylinder 3 is started to drive the upper pressure plate 4 to press down and fix the top of the battery shell 6. Under the connection between the sliding rod 401 and the sliding sleeve 402, the upper pressure plate 4 is stably pressed down, and the battery shell 6 is pressed and fixed after the upper pressure plate 4 is pressed down. At the same time, the left and right sides of the battery shell 6 are positioned and fixed by the positioning rod 403, and the bottom end of the positioning rod 403 is pressed against the bottom end of the battery shell 6 The edge of the battery shell 6 is pressed and fixed to ensure the sealing of the edge during inspection of the battery shell 6, and then the air pump 9 is started to fill the inner side of the sealing groove 503 with a certain gas pressure. If the pressure inside the battery shell 6 is maintained at a predetermined pressure value for a certain period of time, it is a good product. If the pressure value continues to decrease, it is a defective product. Then, water is poured into the inner side of the water drain cover 7 until the water submerges the upper pressure plate 4, and then the position of the rising bubbles in the transparent observation cover 404 is observed to observe which side of the battery shell 6 the bubbles are leaking from. Then, the leakage point of the bubbles is specifically observed to know the specific leakage position of the battery shell 6, and then a specific solution is obtained for improvement. The whole operation process is simple and convenient. Compared with the existing battery shell 6 gas leakage detection method, the utility model can know the specific leakage position of the gas through design, so as to obtain a specific solution, which greatly improves the reliability and accuracy of gas leakage detection.

[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. A gas leakage detection device, comprising a test bench (1), characterized in that: A support frame (2) is fixedly mounted on the top of the test bench (1), a cylinder (3) is fixedly mounted on the top of the support frame (2), an upper pressure plate (4) is fixedly mounted on the driving end of the cylinder (3) and located on the inner side of the support frame (2), a placement table (5) is mounted on the top of the test bench (1) and located below the upper pressure plate (4), a battery shell (6) is mounted between the upper pressure plate (4) and the placement table (5), a water drain cover (7) is fixedly mounted on the top of the test bench (1) and located on the outer side of the support frame (2), an air tightness tester (8) is mounted on the left side of the test bench (1), and an air pump (9) is fixedly mounted on the top of the air tightness tester (8).

2. The gas leakage detection device according to claim 1, characterized in that: A plurality of groups of operating buttons (101) are installed on the front of the test bench (1), and the operating buttons (101) are electrically connected to the air tightness tester (8), the air pump (9) and the air cylinder (3). The left and right sides of the test bench (1) are rotatably connected with handles (102).

3. The gas leakage detection device according to claim 1, characterized in that: The four corners of the top of the upper pressing plate (4) are fixedly connected with sliding rods (401), and the four groups of sliding rods (401) are slidably connected to the support frame (2) through sliding sleeves (402). The bottom of the upper pressing plate (4) and the left and right sides of the battery shell (6) are fixedly connected with two groups of positioning rods (403).

4. The gas leakage detection device according to claim 1, characterized in that: A transparent observation cover (404) is fixedly connected to the interior of the upper pressing plate (4), and a collection cover (405) is fixedly connected to the bottom of the transparent observation cover (404).

5. The gas leakage detection device according to claim 1, characterized in that: The left and right ends of the bottom of the placement platform (5) are fixedly connected to a slide seat (501), and the slide seat (501) is slidably connected to the test platform (1) through a slide rail (502). A sealing groove (503) is provided on the top of the placement platform (5), and a rubber sealing ring (504) is fixedly connected to the inner side of the sealing groove (503) and located at the bottom of the battery shell (6).

6. The gas leakage detection device according to claim 5, characterized in that: A connecting head (505) and an exhaust head (506) are fixedly connected to the front of the placement table (5), and the connecting head (505) and the exhaust head (506) are both connected to the inner side of the sealing groove (503); the connecting head (505) is connected to the air tightness tester (8) via a first connecting hose (507), and the exhaust head (506) is connected to the air pump (9) via a second connecting hose (508).

7. The gas leakage detection device according to claim 1, characterized in that: The front of the drain cover (7) is fixedly connected to a water baffle plate (701), the left side of the drain cover (7) is fixedly connected to a drain pipe (702), the front of the water baffle plate (701) is fixedly installed with a liquid level window (703), and the outer side of the drain cover (7) is fixedly installed with multiple groups of observation windows (704).

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