Honda Motor Co., Ltd.

Yoshikazu Ohnuma

Naoki Maruno

Yuji Fujita

Yoshikazu Nishida

Kazuaki Takizawa

Atsushi Shibutani

Takashi Ogane

Yoshihiro Sunaga

Katsuya Inoue

Satoru Komoda

Mutsuji Suzuki

A storage capacity management system includes an upper limit terminal voltage inducing part for inducing an upper limit terminal voltage, a lower limit terminal voltage inducing part for inducing a lower limit terminal voltage, an upper and lower limit voltage width calculating part for calculating an upper and lower limit voltage width, an intermediate voltage difference calculating part for calculating an intermediate voltage difference, an upper and lower limit voltage ratio calculating part for calculating an upper and lower limit voltage difference, an intermediate determination voltage ratio inducing part, a voltage ratio comparing part, and an intermediate storage capacity inducing part for inducing an intermediate storage capacity based on the upper limit storage capacity, the lower limit storage capacity and the intermediate determination voltage ratio when the results of the comparison by the voltage ratio comparing part satisfy a predetermined condition.

Storage capacity management system

There is provided a charge controller capable of charging a capacitor while suppressing the progress of deterioration of the capacitor without unnecessary charge/discharge of the capacitor. The charge controller includes a voltage sensorthat detects the voltage of a capacitor, a current sensorthat detects the charge/discharge current of the capacitor, a battery ECUthat estimates the SOC of the capacitorbased on the detected voltage, and a management ECU. The management ECUcalculates the charge/discharge amount from the start of charging of the capacitorby integrating the charge/discharge currents detected by the current sensorand controls the charging of the capacitorbased on the estimated SOC and the calculated charge/discharge amount. The management ECUupdates and sets the estimated SOC to an actual use upper limit SOC based on the state characteristics of the capacitor

Charge controller

A battery capacity controller includes a battery capacity estimating part that estimates the battery capacity of a battery in which an internal resistance is increased in accordance with the decrease of the battery capacity in the vicinity of a prescribed lower limit battery capacity and a battery capacity correcting part that changes, during the discharge of the battery, an estimated battery capacity estimated by the battery capacity estimating part to a proper value in a lower limit side when an internal resistance difference as a difference between the internal resistance value of the battery and the internal resistance value of the battery at the time of the lower limit battery capacity is a prescribed value or lower.

Battery capacity controller

Growing community of inventors

Saitama, Japan

Yoshikazu Ohnuma