Rechargeable battery using pressure-crush type protective device and portable electronic device using the rechargeable battery

Abstract

Explosion of rechargeable battery can be prevented in a relatively simple structure, at low cost, and without allowing spouting of electrolyte. A rechargeable battery D using a pressure-crush type protective device comprises a housing H including an internal electrode plate spirally wound about a positive electrode and a negative electrode through a separator, a jacket for accommodating this internal electrode plate and a sealing body for closing the opening of this jacket a positive electrode (or negative electrode) output electrode connected electrically to the internal electrode plate a spacer disposed beneath the sealing body for insulating between the sealing body and internal electrode plate a pressure-crush type protective device A disposed in said spacer as a pressure-sensitive element for detecting the internal pressure in the housing H, and an output terminal connected electrically to one terminal of this pressure-crush type protective device A (one end of a conductor layer A ) for picking up the detection result of the internal pressure detected by the pressure-crush type protective device A electrically to outside, in which other terminal of the pressure-crush type protective device A (other end of the conductor A ) is connected electrically to the positive electrode (or negative electrode) output electrode