CONTROL DEVICE OF ELECTRIC VEHICLE

Title:

CONTROL DEVICE OF ELECTRIC VEHICLE

Document Type and Number:

Japanese Patent JP2009247057

Kind Code:

A

Abstract:

To use a high-voltage battery by sufficiently charging it while suppressing the deterioration of the high-voltage battery.

It is determined whether a terminal voltage Vi of the high-voltage battery exceeds a prescribed voltage V1 or not (mark b) when an ignition switch is switched to an off-state (mark a). When it is determined that the terminal voltage Vi exceeds the prescribed voltage V1 for a prescribed time TO (mark c), drive states of a converter are switched (mark d), and a low-voltage battery is charged by the high-voltage battery. In continuation to this, when it is determined that the terminal voltage Vi of the high-voltage battery is lower than the a prescribed voltage V2 (mark e), the discharge of the high-voltage battery is stopped by the stop of the converter (mark f). As above, since the high-voltage battery is not left in a highly-charged state, the deterioration of the high-voltage battery can be suppressed even if the high-voltage battery is sufficiently charged and used.

Inventors:

YOKOYAMA YUTAKA
ISHII MITSUNORI

Application Number:

JP2008088001A

Publication Date:

October 22, 2009

Filing Date:

March 28, 2008

Export Citation:

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