STORAGE BATTERY VOLTAGE LEVELING DEVICE AND STORAGE BATTERY STATE MONITORING SYSTEM

摘要

Provided is a storage battery voltage leveling device capable of minimizing the variation in voltages among storage batteries in a power source system which has a plurality of lead storage batteries and is constantly connected to a device. The storage battery voltage leveling device according to a typical embodiment of the present invention comprises: temperature measurement units respectively connected in parallel with a part of the serially connected storage batteries to measure the temperature of the connected storage batteries; voltage measurement units for measuring the voltage of the storage batteries; and internal resistance measurement units for measuring the internal resistance of the storage batteries using at least two or more types of frequencies. When measuring the internal resistance of the storage batteries using the internal resistance measurement unit, the storage battery voltage leveling device decreases the voltage of the storage batteries by flowing an electric current through the storage batteries.