BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a battery having a structure preventing the battery from springing out accompanied by a gas ejection when a safety valve is operated. SOLUTION: A plurality of gas vent holes 23 are provided at a position symmetrical to a center of gravity of the battery 1. Since a gas is discharged outward from the gas vent holes 23 lying at the symmetrical position, driving force applied to the battery 1 with the discharge of the gas is offset to prevent the battery 1 from springing out to damage the human body and instruments. COPYRIGHT: (C)2004,JPO