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US 9,865,863 B2Granted
Safety apparatus and protection method of secondary battery for electric vehicle using switch
AssigneeSK Innovation Co., Ltd.
InventorsSooyeup Jang, Jeon Keun Oh
Life of this patent
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Abstract
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.
Claims3
A rupture switch comprising:
- a first holding unit attached to the outside of a secondary battery for use in the electric vehicle and having holding holes provided on one side of a folded metal piece for attaching and holding to the secondary battery for use in the electric vehicle,
- a second holding unit having a holding hole provided on one end in another side of the folded metal piece for attaching and holding to the secondary battery for use in the electric vehicle,
- a third holding unit having a holding hole equipped on another end in the other side of the folded metal piece for attaching and holding to the secondary battery for use in the electric vehicle,
- a destruction unit equipped in a center portion between one side and the other side of the folded metal piece,
- and a fifth switch lead and a sixth switch lead attached to the second holding unit and the third holding unit,
- wherein the rupture switch is destroyed and controls a relay connecting the secondary battery with a drive motor generating a power of the electric vehicle when the secondary battery undergoes a displacement greater than a prescribed value.
3 more elements
Dependencies are inferred from the claim text.