Method of calculating aging factor of battery for hybrid...

Details Method of calculating aging factor of battery for hybrid... Method of calculating aging factor of battery for hybrid...

2008-01-08

2008-01-08

Vu, Bao Q. (Department: 2838)

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

C320S104000

Reexamination Certificate

active

07317299

ABSTRACT:
Disclosed herein is a method of calculating the aging factor of a battery for a hybrid vehicle. The method includes the steps of detecting a first actual SOC value of the battery during operation of the vehicle; storing the first SOC value; initializing accumulated charge and discharge current amounts; determining whether the accumulated charge current amount is larger than a first predetermined value; determining whether the accumulated discharge current amount is larger than a second predetermined value if a charge current amount has not accumulated over the first predetermined value; detecting a second actual SOC value if a discharge current amount has accumulated over the second predetermined value; storing the second SOC value; calculating a theoretical accumulated current amount using the first and second SOC values; calculating an actual accumulated current amount using the accumulated charge and discharge current amounts; and calculating the aging factor of the battery using the theoretical and actual accumulated current amounts.

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