The Furukawa Electric Co., Ltd.

Furukawa Automotive Systems Inc.

Lorand Romvari

Noriyasu Iwane

Taiji Mitsuyama

Naoya Takashima

Koichi Yokoyama

Tamas Mihalffy

Antal Kovats

[Object] To detect states of a plurality of secondary batteries whose kinds are different with high accuracy. [Organization] A measurement unit (voltage sensor, current sensor) measuring a current value of a current flowing at a secondary batteryand a voltage value of a voltage generated at the secondary battery by the current in a predetermined frequency; an optimization unit (CPU) optimizing element constants of an equivalent circuit model of the secondary battery based on the measured voltage value and the current value; an identification unit (CPU) identifying a kind of the secondary battery with reference to the optimized element constants of the equivalent circuit model; a storage unit (ROM) storing detection formulas which detect the state of the secondary battery by each kind of the secondary battery; an acquisition unit (CPU) acquiring the detection formula corresponding to the identified kind from the storage unit; and a detection unit (CPU) detecting the state of the secondary battery by applying the element constants to the acquired detection formula, are included.

Secondary battery state detecting device and secondary battery state detecting method

To provide a secondary battery state detecting device that decreases the deterioration in capacity of the secondary battery and is low in arithmetic cost. A secondary battery state detecting device that detects a state of a secondary battery includes discharge means (discharge circuit ()) for subjecting the secondary battery () to a pulse discharge, acquiring means (controller ()) for controlling the discharge means to subject the secondary battery to at least one pulse discharge, and acquiring a time variation of a voltage value at that time, calculating means (controller ()) for calculating a parameter of a predetermined function having time as a variable by fitting the variation of the voltage value acquired by the acquiring means using the predetermined function, and detecting means (controller ()) for detecting the state of the secondary battery on the basis of the parameter of the predetermined function calculated by the calculating means.

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Budapest, Hungary

Lorand Romvari