Mitsubishi Heavy Industries Limited

Kyushu Electric Power Co., Inc.

Masazumi Ohishi

Tetsuro Shigemizu

Takehiko Nishida

Masami Iida

Hidehiko Tajima

Kazuyuki Adachi

Shinji Murakami

Yoshihiro Wada

Katsuaki Kobayashi

Masataka Uchida

Hitoshi Matsumura

The battery state-of-charge calculation device () is provided with a SOCV calculation unit () which outputs a first state of charge calculated based on voltage data, a SOCI calculation unit () which outputs a second state of charge calculated based on current data, an estimated impedance voltage calculation unit () which calculates an impedance voltage value based on an effective state of charge and the current data, a static determination unit () which determines that the impedance voltage value remains static for a predetermined time or longer in a range identified by a predetermined threshold value and outputs the determination result; and a SOC decision unit () which, based on the determination result, outputs the first state of charge as the effective state of charge where the impedance voltage value is static and outputs the second state of charge as the effective state of charge where the impedance voltage value is not static.

Battery state-of-charge calculation device

An abnormality prediction system for secondary batteries according to the present invention includes: a parameter value detection portion that detects parameter values each corresponding to each of a plurality of secondary batteries to determine whether all the parameter values are normal or not; and a singular state determination portion that determines, if a difference between a reference value calculated by use of all the parameter values determined to be normal by the parameter value detection portion and at least one of the parameter values is not less than a threshold value, the secondary battery corresponding to the parameter value with the difference not less than the threshold value to be in a state different from those of the other secondary batteries out of the plurality of secondary batteries.

Abnormality prediction system for secondary batteries

Growing community of inventors

Tokyo, Japan

Masazumi Ohishi