Patent ID: 9385399
Filing Date: 2016-07-05
CPC Classification: H01M,Y02E

Claim Text:
1. A secondary battery, comprising: a prismatic or pouch-shaped battery cell having a cathode and an anode; two or more mechanical connection sensors fixed to an outer surface of the prismatic or pouch-shaped battery cell, wherein the two or more mechanical sensors are connected in parallel with each other, and wherein the two or more mechanical connection sensors are in an OFF state unless the battery cell swells to a critical value or more thereby turning at least one of the two or more mechanical sensors into an ON state wherein electrical energy accumulated in the battery cell is conducted through a sensor in the ON state; and a resistor electrically connected in series with the two or more mechanical connection sensors and between the anode and the cathode of the battery cell, wherein the resistor has a predetermined resistance value, whereby when the battery cell swells to the critical value or more due to abnormal operation of the battery cell, at least one of the two or more mechanical connection sensors is turned into the ON state and conducts electrical energy accumulated in the battery cell to the resistor where the electrical energy is consumed, and wherein each of the mechanical connection sensors has two connection terminals spaced vertically apart from each other and mounted in a pressure-sensitive sheath, and an elastic member mounted between the connection terminals.