Sanyo Electric Co., Ltd.

Panasonic Energy Co., Ltd.

Hidenori Tsuda

Kenji Kawaguchi

Tooru Amazutsumi

Masayuki Kobayashi

Hideki Kishi

Toshiaki Ishikawa

Shota Ogawa

Hideyuki Nagaya

Shusuke Miyaji

The standby power supply device includes one or more secondary batteries and a charging circuit that charges the secondary batteries. The charging circuit includes a voltage adjuster that controls the state of charge of the secondary batteries, and a controller that controls the voltage adjuster by detecting the degree of deterioration of the secondary batteries over time. In the charging circuit, the voltage adjuster charges the secondary batteries at a charge voltage lower than a full charge voltage of the secondary batteries to bring the secondary batteries into a load power supply standby state, and gradually increases the charge voltage of the secondary batteries according to the degree of deterioration of the secondary batteries detected by the controller.

Standby power supply device and method for charging secondary battery

In a residual capacity correction method for a battery, a count of one cycle is made each time an accumulated quantity of a charge capacity of a battery reaches a learning capacity of the battery at that time, and the learning capacity is decreased by a specified cycle degradation capacity per charge of the one cycle, alternatively a decreasing rate of the learning capacity is specified as a keeping degradation capacity while a keeping temperature and a residual capacity of the battery are used as parameters, and as a keeping time passes, the learning capacity is decreased by the keeping degradation capacity specified from the keeping temperature and the residual capacity of the battery.

Residual capacity correction method for battery

Growing community of inventors

Hyogo, Japan

Hidenori Tsuda