EMERGENCY POWER SOURCE SYSTEM AND SYSTEM FOR AUTOMATICALLY DETECTING SINGLE CELL FAULT IN BATTERY USED FOR THE SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide an emergency power source system capable of installing at narrow restricted place space and having space-saving and an emergency power source system having a long useful life of a battery and a low replacing frequency at a low cost. SOLUTION: The emergency power source system supplies a DC power to a DC load 3 by a rectifier 2 at a normal time by a circuit for electrically connecting the load 3, the rectifier 2 to the battery, automatically charge, the battery, and supplies the power to the load 3 by the battery in an emergency for stopping the rectifier 2 due to power interruption or the like. In this case, the battery uses a sodium-sulfur battery 1.