Fujitsu Corporation

Zeon Corporation

Hideo Fukuda

Koichi Nishimura

Masafumi Okumura

Toshio Ohkawa

A battery control devicehas an electric circuit control unitcontrolling a power supply; a voltage measuring unitmeasuring a voltage; a current measuring unitmeasuring an electric current; and a power source control unit, wherein the power source control unitmeasures a first voltage defined as the voltage of the batteryand a first current defined as the current of the batteryin a state where the batterysupplies electric power to the load, measures a second voltage defined as the voltage of the batteryin a state where the supply of the electric power to the loadfrom the batteryis cut off, and calculates internal impedance of the batteryby dividing a value, obtained in a way that subtracts the first voltage from the second voltage, by the first current.

Battery control device, battery control method, power source control device and electronic apparatus

A battery control device includes a unit to measure a voltage of a battery, a unit to measure an electric current of the battery, and a control unit to calculate an open-circuit voltage of the battery based on the voltage and the electric current of the battery, and to calculate a battery residual quantity ratio of the battery by use of relative information and the calculated open-circuit voltage, wherein the control unit calculates a charge quantity ratio of the battery by subtracting a battery residual quantity ratio at charge ending time from a battery residual quantity ratio at charge starting time, calculates a value obtained by multiplying the charge quantity ratio by a correction coefficient as a charging-discharging count of the battery, and integrates the charging-discharging count each time the charging-discharging count is calculated.

Battery control device, battery control method, battery pack, electronic apparatus and control circuit for calculating charging-discharging count of battery

A rubber composition comprising a combination of a nitrile rubber and an epilhalohydrin rubber is cross-linked to give a crosslinked product, by using at least two kinds of crosslinking agents selected from a sulfur-containing crosslinking agent, a mercaptotriazine crosslinking agent and a 2,3-dimercaptoquinoxaline crosslinking agent.

Growing community of inventors

Kawasaki, Japan

Hideo Fukuda