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

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.

A safety apparatus of a secondary battery for use in electric vehicle using a switch, comprising:

• a secondary battery for use in electric vehicle having at least one secondary battery stacked to supply power to an electric vehicle;
• a drive motor generating a power of the electric vehicle;
• a battery controller controlling a connection between the secondary battery for use in electric vehicle and a power of the drive motor;
• and
• a switch apparatus of the secondary battery for use in electric vehicle and a rupture switch which is connected to the battery controller and is operated or destroyed in accordance with whether the secondary battery for use in electric vehicle undergoes a displacement greater than a prescribed value,
• wherein the switch apparatus of the secondary battery for use in electric vehicle and the rupture switch control a relay connecting the secondary battery for use in electric vehicle with the drive motor.

A protection method of a secondary battery for use in electric vehicle using a switch apparatus of the secondary battery for use in electric vehicle and a rupture switch, comprising steps of:

• controlling a connection between the secondary battery for use in electric vehicle and a drive motor and a power of the drive motor by transmitting a control signal in a battery controller of an electric vehicle;
• causing the switch apparatus of the secondary battery for use in electric vehicle and the rupture switch to be operated and destroyed when the secondary battery for use in electric vehicle undergoes a displacement greater than a prescribed value;
• outputting a interrupt control signal by causing the operation and the destruction of the switch apparatus and the rupture switch to be sensed by a battery relay coil unit through a first switch lead, a second switch lead, a third switch lead a fourth switch lead, a fifth switch lead, and a sixth switch lead of the switch apparatus of the secondary battery for use in electric vehicle and the rupture switch;
• transmitting the interrupt control signal to the battery relay contact through a magnetic signal system in the battery relay coil unit in order to control the battery relay contact;
• and
• controlling a relay connecting between the secondary battery for use in electric vehicle and the drive motor delivering power to the electric vehicle in the battery relay contact.