Initiatively cutting circuit disconnector

Abstract

The invention discloses an initiatively cutting circuit disconnector and particularly relates to the disconnector applied to a power lithium cell power supply. The disconnector comprises a shell body, a temperature sensing mechanism, a heating mechanism and a bridge type contact mechanism, wherein the temperature sensing mechanism comprises a temperature sensing body, the heating mechanism comprises a heating component, the bridge type contact mechanism comprises a bridge type movable spring piece, at least one bridge type static spring piece, an insulating support and a first elastic element, the temperature sensing body is used as a supporting component at one end of the insulating support and is controlled by the heating component, the bridge type movable spring piece is installed on the insulating support, touch point contact is formed between one face, directing towards the other end of the insulting support correspondingly, of the bridge type movable spring piece and the bridge type static spring piece, the bridge type movable spring piece, the bridge type static spring piece and a lithium cell or a lithium cell pack are connected in series and form a lithium cell major loop, and the first elastic element is arranged between the other end of the insulating support and the inner wall of the shell body in an expanding and leaning mode. The disconnector is matched with a cell managing system, the lithium cell major loop is cut when overvoltage or overcharge or overdischarge occurs in the lithium cell, hidden dangers such as fire or explosion of the lithium cell is eliminated under an abnormal condition, and the disconnector has the advantages of being fast in action, small in occupied area, convenient to install and use and the like.

Description

technical field [0001] The invention relates to a circuit breaker for cutting off a circuit, in particular to a circuit breaker for protecting the lithium battery by cutting off the power lithium battery when the lithium battery is overcharged or overdischarged. Background technique [0002] Lithium-ion batteries have high energy density, high average output voltage, and low self-discharge. A good lithium battery, below 2% per month (recoverable), has no memory effect. The wide working temperature range is -20℃~60℃. Lithium batteries have the advantages of superior cycle performance, fast charging and discharging (charging efficiency up to 100%), high output power, light weight, long service life, and no toxic and harmful substances, so they are called green batteries. In recent years, with the advancement of lithium battery development technology, power lithium batteries for various purposes have also been developed. [0003] In recent years, electric bicycles, hybrid ve...

AI Technical Summary

Problems solved by technology

However, this method of cutting off the circuit is not completely disconnected from the electricity. In addition, the contactor is large in size and is prone to automatic return when the fault factor is not eliminated, and the cutting off of the thyristor needs to be maintained by the trigger current. It is easy to cause security risks to re-emerge

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