| 摘要 |
PURPOSE: Provided is a prismatic secondary battery, which can turn off electric current by operating a bimetal mounted between an electrode tap and an electrode terminal when the battery is out of order. CONSTITUTION: The prismatic secondary battery contains: an electrode plate assembly(25) formed by winding a cathode plate, an anode plate, and a separator; a prismatic case(24) in which the electrode plate assembly(25) is inserted; a metallic cap plate(21) sealing the prismatic type case(24); an insulating gasket(22) inserted in a hole formed on the cap plate(21); the electrode terminal(23) inserted in a hollow formed on the gasket(22); the electrode tap(26) connected electrically to the cathode plate or the anode plate; the bimetal(30) of which one end is in contact with the lower part of the electrode terminal(23) inserted in the case(24) and the other side is connected to the electrode tap(26). The bimetal(30) comprises two kinds of metals, wherein the upper metal(30a) has higher thermal expansion rate than the lower metal(30b).
|
