Pressure relief structure of the battery top cover

Abstract

The invention relates to the battery top cover field, and discloses a pressure relief structure of a battery top cover. The pressure relief structure comprises a cover plate and a pressure relief valve body; the pressure relief valve body is formed on the cover plate; the lower part of the pressure relief valve body is provided with a through hole, and the upper part of the pressure relief valve body is provided with an accommodating cavity; the accommodating cavity is internally provided with a movable plate; a gap exists between the periphery of the movable plate and the side wall of the accommodating cavity; an end cover is formed at the upper end of the pressure relief valve body and is provided with a communicating hole communicating with the gap; a spring is arranged between the movable plate and the end cover. Compared with the prior art, when an internal pressure of a battery is too large, the movable plate is pushed upwards by strong-pressure gas and then moves upwards, at the time, the spring between the movable plate and the end cover is compressed, the through hole is opened, the internal pressure of the battery is leaked through a gap between the movable plate and the through hole, overflows along the side wall gap and then is discharged out of the accommodating cavity through the communicating hole; when the internal pressure intensity of the battery restores normal, the compressed spring is reset to drive the movable plate to be returned and sealedly cover the through hole anew; the pressure relief structure can be automatically reset and reused.

Description

technical field [0001] The invention relates to the field of the battery top cover, in particular to the pressure relief structure of the battery top cover. Background technique [0002] With the miniaturization and portability of electronic products, the use of batteries is becoming more and more extensive. This is because the battery structure is simple, easy to carry, easy to charge and discharge, not affected by the external climate and temperature, and its performance is stable and reliable. It plays an important role in all aspects of modern social life. [0003] However, during the use and transportation of the battery, a short circuit may occur. The battery core is discharged with a large current, which generates a lot of heat and burns the diaphragm, resulting in a greater short circuit phenomenon. In this way, the battery core will generate high temperature and decompose the electrolyte. When the outer shell of the battery cell cannot withstand this pressure, the ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a pressure relief structure for the battery top cover, aiming to solve the problem in the prior art that the blasting element cannot reset itself and can be used repeatedly

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