Method and device for detecting and identifying air leakage of explosion-proof valve of battery cover plate

A technology of battery cover and identification device, which is applied in battery/battery leak test, exhaust plug device, battery cover/end cover, etc. It can solve the problems of missing inspection and mixing materials, and achieve the effect of preventing external force damage
CN112787007APending Publication Date: 2021-05-11宜春市骏智机电科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
宜春市骏智机电科技有限公司
Publication Date
2021-05-11

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Abstract

The invention discloses a method and a device for detecting and identifying air leakage of an explosion-proof valve of abattery cover plate. The device comprises a battery body and a battery cover plate installed on the upper part of the battery body, the middle part of the battery cover plate is provided with the explosion-proof valve, the top of the explosion-proof valve is provided with an air leakage identification unit, and the air leakage identification unit is provided with air leakage detection test paper. After the battery is filled with electrolyte, if the electrolyte leaks due to welding quality defects of the explosion-proof valve and gas generated after the leaked electrolyte is in contact with air is in contact with the air leakage detection test paper, the color of the air leakage detection test paper changes, and whether the color of the air leakage detection test paper changes or not is observed by naked eyes to judge whether the explosion-proof valve leaks or not. According to the invention, whether the explosion-proof valve has the welding defect can be simply and rapidly judged, the abnormal battery is identified, the abnormal battery is prevented from entering the subsequent process and flowing to the market to cause greater potential safety hazards, and the use safety of the battery is ensured while the detection cost is reduced.
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Description

technical field

[0001] The invention relates to the technical field of power batteries, in particular to a method and device for detecting and identifying air leakage of an explosion-proof valve on a battery cover. Background technique

[0002] In recent years, driven by the concept of "green and sustainable development", the new energy vehicle market has continued to expand rapidly, driving the rapid growth of the new energy battery market. The battery cover is a key structural part of the new energy battery, and its many key characteristics directly determine the safety of the battery during use. The explosion-proof valve is a key safety part of the battery cover. When the battery is short-circuited, overcharged and over-discharged and other abnormalities cause the pressure in the battery to rise sharply, the explosion-proof valve can explode in time and discharge the gas, thereby preventing the battery from exploding. In the prior art, the explosion-proof valve is welded...

Claims

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