Power-off device for automatic current cutoff of new-energy battery

Abstract

The invention discloses a power-off device for automatic current cutoff of a new-energy battery and belongs to the field of battery accessories. A method comprises the following steps: one end of thedevice is moveably connected with an end plate; the middle part of the device comprises a circular concave structure; two wings of the device respectively comprise stripy concave structures; the innerdiameter of each stripy concave structure is greater than the inner diameter of the circular concave structure. Since the automatic current cutoff device is arranged outside a battery, internal resistance drifting of the battery can be avoided, possible weld opening in the vibration process of the battery can be avoided, and effective security protection can be achieved. In addition, since the automatic current cutoff device is arranged outside a battery, danger accidents that explosion is caused when the battery contacts an integral chemical solution in case of abnormity can be avoided, theprobability of battery explosion can be reduced, and the security can be improved.

Description

technical field [0001] The invention relates to the field of battery accessories, in particular to a power-off device for automatically cutting off the current of a new energy battery. 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 b...

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, because the automatic current 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, which increases the possibility of battery explosion and further increases the potential safety hazard.

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