Nec Corporation

Shinya Ohhata

Shingo Takahashi

Yuan Luo

Nobuhide Yoshida

Noriyuki Itabashi

Junji Kogure

A battery control device includes: a measurement unit that individually measures an amount of discharging current of each discharging secondary battery of discharging secondary batteries among a plurality of secondary batteries which are independently charged and discharged; a time calculating unit that calculates time required for discharging said each discharging secondary battery until said each discharging secondary battery reaches a constant battery capacity based on a discharging current rate for said each discharging secondary battery which is calculated based on the amount of discharging current, and a state of charge (SOC) of said each discharging secondary battery; a number calculating unit that calculates an expected number of charging secondary batteries among said plurality of secondary batteries, which become fully charged in a required time, based on a charging current rate for each charging secondary battery of charging secondary batteries among said plurality of secondary batteries which is calculated based on an amount of charging current of said each charging secondary battery, a SOC of said each charging secondary battery, and the required time, and calculates a total value of the expected number and an existing number of said charging secondary batteries among said plurality of secondary batteries which are already fully charged; and a control unit that determines whether or not to raise the charging current rate based on the total value.

Battery control device, power storage device, power storage method, and program

A battery control device () includes: a measurement unit () that measures a voltage of a secondary battery; a control unit () that initiates a charging process of performing charging until the voltage of the secondary battery reaches a second reference value greater than a first reference value in a case where a voltage measured by the measurement unit () is less than the first reference value; and an adjustment unit () that receives a degree of deterioration of the secondary battery as first adjustment information that becomes a reference for adjustment of a hysteresis width that is determined on the basis of the first reference value and the second reference value, and adjusts the hysteresis width on the basis of the first adjustment information that is received.

Growing community of inventors

Tokyo, Japan

Shinya Ohhata