| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an open-circuit voltage deducing device of a battery for a vehicle which deduces the open-circuit voltage with high accuracy, and contributes to the improvement in the reliability of a battery supervisory unit as a whole. <P>SOLUTION: The open-circuit voltage deducing device of the battery for the vehicle includes a voltage-detecting means for detecting the battery voltage, and a current-detecting means to detect a battery current flowing through a load of the vehicle from the battery, wherein the deducing device includes an open-circuit voltage deducing means which deduces the battery voltage detected by the voltage-detecting means to be the open-circuit voltage, in such a state such that the ignition switch of the vehicle is in off state, and in a state where the battery current, detected by the current detecting means, is smaller than a set value has continued for a fixed time interval. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
