Safety Apparatus and Protection Method of Secondary Battery for Electric Vehicle Using Switch

摘要

The present invention relates to a safety apparatus and a protection method of a secondary battery, which can prevent explosion and fire of the secondary battery using a switch or a rupture switch attached on the outside of the secondary battery if a swelling degree of the secondary battery reaches a predetermined value when the secondary battery is swelled due to abnormal usage such as overcharge, short-circuit, reverse-connection and heat-exposure of large-capacity lithium polymer battery.

主权项

1. A rupture switch, comprising:
a first holding unit attached to outside of a secondary battery for use in electric vehicle and having holding holes provided on one side of a “U” type metal piece for attaching and holding to the secondary battery for use in electric vehicle; a second holding unit having a holding hole provided on one end in other side of the “U” type metal piece for attaching and holding to the secondary battery for use in electric vehicle; a third holding unit having a holding hole equipped on other end in the other side of the “U” type metal piece for attaching and holding to the secondary battery for use in electric vehicle; a destruction unit equipped in a center portion of the “U” type metal piece; and a fifth switch lead and a sixth switch lead attached to the second stationary unit and the third stationary unit.