Fully-charged battery capacity detection method

Details Fully-charged battery capacity detection method Fully-charged battery capacity detection method

2011-05-17

2011-05-17

Diao, M'baye (Department: 2858)

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

C320S134000, C702S063000

Reexamination Certificate

active

07944178

ABSTRACT:
A fully-charged battery capacity detection method includes a capacity variation detection step, an open-circuit voltage detection step, a remaining capacity determination step, a remaining capacity variation rate calculation step, and a fully-charged capacity calculation step. The capacity variation detection step calculates a capacity variation value of a battery between first detection timing and second detection timing. The open-circuit voltage detection step detects first and second open-circuit voltages of the battery at the first and second detection timing, respectively. The remaining capacity determination step determines first and second remaining capacities of the battery based on the first and second open voltages, respectively. The remaining capacity variation rate calculation step calculates a remaining capacity variation rate based on the difference between the first and second remaining capacities. The fully-charged capacity calculation step calculates a fully-charged capacity of the battery based on the remaining capacity variation rate and the capacity change value.

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European Search Report issued Feb. 15, 2011 in European Application No. 08004936.4 (in English).

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