CN210221850U

CN210221850U - Device for testing lithium battery diaphragm pinhole

Info

Publication number: CN210221850U
Application number: CN201920965990.0U
Authority: CN
Inventors: Yeqing Zhang; 张叶青; Xingxing Weng; 翁星星; Cheng Jin; 金骋; Zhaohui Chen; 陈朝晖; Jingjing Gong; 贡晶晶
Original assignee: Jiangsu Housheng New Energy Technology Co Ltd
Current assignee: Jiangsu Housheng New Energy Technology Co Ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-03-31
Anticipated expiration: 2029-06-25

Abstract

The utility model relates to a test device of lithium cell diaphragm pinhole, which comprises a bracket, be equipped with the placer who is used for placing the diaphragm on the support, the support bottom is equipped with the verifying attachment who is used for examining the diaphragm pinhole, the support top still is equipped with and is used for detecting the detection device of pinhole gas permeability, still be equipped with on the support and be used for the drive arrangement that detection device removed. The utility model discloses test lithium battery diaphragm's face defect of membrane tests the diaphragm pinhole through the ventilative tester, has improved the accuracy and the validity of test to the efficiency of test has been improved.

Description

Device for testing lithium battery diaphragm pinhole

Technical Field

The utility model belongs to the technical field of detection device's technique and specifically relates to a detection device for detecting lithium cell diaphragm face quality.

Background

The lithium ion battery diaphragm is one of the more critical components in the lithium battery, and the performance of the lithium ion battery diaphragm directly affects the internal structure, the battery capacity, the safety, the cycle life and the like of the lithium battery. The separator has a main function of separating the positive electrode and the negative electrode of the battery to prevent short circuit due to contact between the two electrodes, and also has a function of allowing electrolyte ions to pass therethrough.

Pinhole defects on the membrane surface can directly cause short circuit of the lithium ion battery, so that how to effectively and quickly detect the lithium ion battery diaphragm is very important. At present, in the industry, the apparent defects of the diaphragm to be detected are usually observed by using a magnifying glass or an LED film viewing lamp to judge whether the diaphragm has the pinhole defect, but the method can cause misjudgment on the semi-transparent pinhole. Therefore, the technical scheme of the utility model this difficult problem has been solved, the validity and the accuracy that detect have been improved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the problem that detects half transparent "pinhole" erroneous judgement in the lithium cell diaphragm, the utility model provides a device of test lithium cell diaphragm pinhole, which comprises a bracket, be equipped with the placer who is used for placing the diaphragm on the support, the support bottom is equipped with the verifying attachment who is used for examining the diaphragm pinhole, the support top still is equipped with and is used for detecting the detection device of pinhole gas permeability, still be equipped with on the support and be used for the drive arrangement that detection device removed.

Preferably, the detection device is an air permeability tester, and the air permeability tester is positioned above the placing device.

Further, the placing device comprises a rotating roller, the rotating roller is located on the support, driven rollers are arranged above the rotating roller, and a channel for conveying the diaphragm is formed in a gap between each driven roller and the corresponding rotating roller. A channel is formed between the rotating roller and the driven roller, the diaphragm is conveyed to the middle of the support, and the rotating roller and the driven roller are arranged on the two sides of the support, so that the diaphragm is tensioned, the plane of the diaphragm is flat, and no wrinkles exist.

Preferably, the driving device comprises a sliding block, a sliding rail is arranged above the support, the sliding block is arranged on the sliding rail in a sliding mode, and a fixing block used for installing the detection device is further arranged on the sliding block in a sliding mode.

Furthermore, the inspection device is an LED film viewing lamp, and the LED film viewing lamp is positioned below the placing device. The LED film viewing lamp can adjust the brightness of light in a stepless manner.

Has the advantages that: the utility model discloses test lithium battery diaphragm's face defect of membrane tests the diaphragm pinhole through the ventilative tester, has improved the accuracy and the validity of test to the efficiency of test has been improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the present invention with the diaphragm removed;

1. a support; 2. a diaphragm; 3. a slide rail; 4. a slider; 5. a fixed block; 6. a gas permeability tester; 7. an LED film viewing lamp; 8. a driven roller; 9. rotating roller

Detailed Description

As shown in figure 1, a device of test lithium cell diaphragm pinhole, including support 1, be equipped with the placer that is used for placing diaphragm 2 on support 1, 1 bottom of support is equipped with the verifying attachment who is used for examining diaphragm 2 pinholes, 1 top of support still is equipped with and is used for detecting the detection device of pinhole gas permeability, still be equipped with on support 1 and be used for the drive arrangement that detection device removed. As shown in fig. 2, the placing device comprises rotating rollers 9, the rotating rollers 9 are positioned on the bracket 1, driven rollers 8 are arranged above the rotating rollers 9, and a gap between the driven rollers 8 and the rotating rollers 9 forms a channel for conveying the diaphragm 2. The driving device comprises a sliding block 4, a sliding rail 3 is arranged above the support 1, the sliding block 4 is arranged on the sliding rail 3 in a sliding mode, and a fixing block 5 used for installing the detection device is further arranged on the sliding block 4 in a sliding mode. The inspection device is an LED film viewing lamp 7, and the LED film viewing lamp 7 is positioned below the placing device.

The specific working principle is as follows: taking a lithium battery diaphragm 2, placing the lithium battery diaphragm 2 between a driven roller 8 and a rotating roller 9, clamping the diaphragm 2 by the driven roller 8 and the rotating roller 9 on two sides of a support 1, flattening the surface of the diaphragm 2 without wrinkles, opening an LED film viewing lamp 7, adjusting the brightness to appropriate light, checking defects on the surface of the diaphragm 2, recording the position of a bright point if the position of the bright point (namely the position of a pinhole) is found, starting a driving device, matching a ventilation tester 6 with a sliding block 4 through a sliding rail 3 in a transverse direction, moving to a transverse designated position, then sliding a fixed block 5, moving the ventilation tester 6 to a longitudinal designated position, namely, enabling the ventilation tester 6 to reach the required position; and starting the probe of the air permeability tester 6 to detect whether the bright spot is a true pinhole, wherein if the bright spot is the true pinhole, the value detected by the probe of the air permeability tester 6 is 0, and if the bright spot is not the true pinhole and is a semi-transparent pinhole, the value detected by the probe of the air permeability tester 6 is not 0. Therefore, the device can be used for accurately judging whether the bright spots on the lithium battery diaphragm 2 are true pinholes or not, and the accuracy and the effectiveness of detecting the pinholes are improved.

Claims

1. The utility model provides a device of test lithium cell diaphragm pinhole which characterized in that: including support (1), be equipped with the placer that is used for placing diaphragm (2) on support (1), support (1) bottom is equipped with the verifying attachment who is used for examining diaphragm (2) pinhole, support (1) top still is equipped with the detection device who is used for detecting the pinhole gas permeability, still be equipped with on support (1) and be used for the drive arrangement that detection device removed.

2. The device for testing the pin hole of the lithium battery diaphragm as claimed in claim 1, wherein: the detection device is an air permeability tester (6), and the air permeability tester (6) is located above the placement device.

3. The device for testing the pin hole of the lithium battery diaphragm as claimed in claim 2, wherein: the placing device comprises a rotating roller (9), the rotating roller (9) is located on the support (1), driven rollers (8) are arranged above the rotating roller (9), and a channel for conveying the diaphragm (2) is formed by gaps between the driven rollers (8) and the rotating roller (9).

4. The device for testing the pin hole of the lithium battery diaphragm as claimed in claim 1, wherein: the driving device comprises a sliding block (4), a sliding rail (3) is arranged above the support (1), the sliding block (4) is arranged on the sliding rail (3) in a sliding mode, and a fixing block (5) used for installing the detection device is arranged on the sliding block (4) in a sliding mode.

5. The device for testing the pin hole of the lithium battery diaphragm as claimed in claim 1, wherein: the inspection device is an LED film viewing lamp (7), and the LED film viewing lamp (7) is positioned below the placing device.