Voltage-measuring device
AssigneeYazaki Corporation
InventorsManabu Ooishi, Satoshi Ishikawa
Life of this patent
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Abstract
A voltage measuring circuit 11 measures a voltage of a block B1. Then, a voltage measuring circuit 12 measures a voltage of a block B2. Then, the voltage measuring circuit 11 measures again the voltage of a block B1. A low voltage CPU judges that an in-vehicle battery is abnormal if the measured voltage is out of predetermined upper and lower limits, or a voltage difference between the block B2 and the block B1 measured again is more than a predetermined value.
Claims3
A voltage measuring device for an in-vehicle high voltage battery consisting of a plurality of rechargeable batteries connected in series with each other, said device comprising:
- voltage measuring members respectively mounted on a plurality of blocks for measuring voltages of blocks, each of which having at least one rechargeable battery;
- a control member for causing the voltage measuring members of two different blocks to alternately measure voltages three times or more, followed by judging abnormality of the in-vehicle high voltage battery on the basis of the measured voltages, then repeating the same measuring and judging for all other combinations of two different blocks in turn.
Dependencies are inferred from the claim text.