Adaptive effective C-rate charging of batteries

摘要

The disclosed embodiments provide a system that manages use of a battery in a portable electronic device. During operation, the system obtains a voltage of the battery and a state-of-charge of the battery. Next, the system calculates an effective C-rate of the battery using the voltage and the state-of-charge. Finally, the system uses the effective C-rate to manage a charging process for the battery.

主权项

1. A method for managing use of a battery in a portable electronic device, comprising:
measuring a voltage of a battery using a voltage sensor; obtaining a state-of-charge of the battery; interpolating, using a computer, pre-characterized constant-current curves of the battery to determine a constant-current curve which contains the measured voltage and the obtained state of charge; determining a present effective C-rate corresponding to the determined constant-current curve; and varying a charging current applied to the battery to control the effective C-rate toward a target C-rate of the battery until a target voltage of the battery is reached.