Current automatic cut-off device applied to new energy battery

Abstract

The embodiment of the invention provides a current automatic cut-off device applied to a new energy battery, and belongs to the field of battery accessories. The current automatic cut-off device applied to the new energy battery comprises a power-off structure, a stress structure and a lever structure; one end of the power-off structure is movably connected with a terminal plate; the middle part of the power-off structure comprises a round concave structure; each of two wing parts of the power-off structure comprises a strip-shaped concave structure; the inner diameter of the strip-shaped concave structure is more than the inner diameter of the round concave structure; the stress structure is connected with the lever structure; the bottom surface of the stress structure is contacted with avent hole; the outer diameter of the stress structure is less than the inner diameter of a round hole in which the vent hole is formed; the supporting point of the lever structure is positioned on the inner bottom surface of a shell; one end of the lever structure is connected with the upper surface of the stress structure and the other end of the lever structure is connected with a limiting structure. The current automatic cut-off device is arranged outside the battery, so that effective safety protection is realized. The possibility of battery explosion is reduced and the safety is improved.

Description

technical field [0001] The invention relates to the field of battery accessories, in particular to an automatic current cut-off device applied to new energy batteries. Background technique [0002] Due to its excellent characteristics, lithium batteries have gradually been accepted by the market and developed rapidly. However, during the use of lithium batteries, there are unsafe problems such as battery explosions when the batteries are overcharged or short-circuited. [0003] In order to solve the above problems, the technical solution provided by the prior art is to connect the CID (Current Interrupt device, current automatic cut-off device) combination cover plate and the aluminum cover plate together by sealing welding as the current automatic cut-off device, and install it inside the battery. [0004] However, in the process of using this technical solution, since the automatic current cut-off device is inside the battery, and there is no connection between the top co...

AI Technical Summary

Problems solved by technology

[0004] However, in the process of using this technical solution, since the automatic current cut-off device is inside the battery, and there is no connection between the top cover and the aluminum cover plate, the top cover is prone to movement, resulting in drift of the internal resistance of the battery, and the battery cannot resist vibration. , It is easy to open the welding during the vibration of the battery, and it has never been unable to achieve effective safety protection

In addition, since the current automatic cut-off device is inside the battery, when the battery is abnormal, it is easy to contact the internal chemical solution and cause dangerous accidents such as explosion

Increase the possibility of battery explosion, but further increase the potential safety hazard

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