Yazaki Corporation

Youchi Arai

Tsutomu Saigo

Michito Enomoto

A remaining capacity measuring apparatus of this invention operates as follows. A current value and a voltage value from a current sensor and a voltage sensor respectively provided in a battery connected to a hybrid mechanism portion are sampled every 1 millisecond. Each time when eight pairs (N,) of this current value data and voltage value data are collected, the current values and voltage values are each averaged. When 100 pairs (N,) of the average current values and the average voltage values are obtained, the 100 pair data are plotted on a voltage-current coordinate system. A correlation between the current and voltage is obtained based on the plural data plotted on this coordinate system. When a strong negative correlation is indicated, an approximate line indicating a relation between the voltage and current is obtained. By substituting a predetermined current value for this line, a voltage value is defined and a value corresponding to this voltage value is regarded as a current remaining capacity.

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Shizuoka-ken, Japan

Youchi Arai