PROTECTIVE ELEMENT AND PACK BATTERY PROVIDED WITH THE SAME

摘要

PROBLEM TO BE SOLVED: To blow out a fuse without fail by a heating resistor even under a big variation of voltage of a battery housed in a pack battery. SOLUTION: The protective element is provided with low-melting-point metal 5 which is blown out by heating, and a heating resistor 4 which heats the low-melting-point metal 5 with Joule heat generated by current conducted by being thermally coupled with the low-melting point-metal 5. The heating resistor 4 is made by connecting in parallel a plurality of resistance elements 7 which have different electrical resistances and also different supply voltages for blowing out. COPYRIGHT: (C)2007,JPO&INPIT