Patent ID: 9627904
Date: 2017-04-18
CPC Classifications: H01M,H02J,Y02E

Claim:
1. A charging method, comprising: acquiring, by a charging voltage acquiring unit, a real-time charging voltage corresponding to a present charging current when a terminal is charged at the present charging current; determining, by a determining unit, whether a difference between the real-time charging voltage corresponding to the present charging current and an ideal charging voltage exceeds a preset voltage drop threshold, wherein the ideal charging voltage is an electromotive force provided by a charging power supply when a charging circuit is not connected to load, and wherein the voltage drop threshold is a voltage generated when a maximum load current of a charger passes an internal resistor of the charger; reducing, by a charging current reducing unit, a charging current to a previous-level charging current of the present charging current such that the terminal is charged at the previous-level charging current when the difference between the real-time charging voltage corresponding to the present charging current and the ideal charging voltage exceeds the voltage drop threshold; boosting, by a charging current boost unit, the charging current to a next-level charging current of the present charging current such as to continue to determine whether the difference between the real-time charging voltage and the ideal charging voltage exceeds the voltage drop threshold when the difference between the real-time charging voltage corresponding to the present charging current and the ideal charging voltage does not exceed the voltage drop threshold; continuing to boost the charging current to the highest-level charging current when the difference does not exceed the voltage drop threshold, and wherein after reducing, by the charging current reducing unit, the charging current to the previous-level charging current of the present charging current, the method further comprises: dividing, by a charger internal resistance acquiring unit, a difference between a real-time charging voltage corresponding to the previous-level charging current and the ideal charging voltage by the previous-level charging current, to obtain a resistance of the internal resistor of the charger; dividing, by a critical charging current acquiring unit, the voltage drop threshold by the resistance of the internal resistor of the charger, to obtain a critical charging current; and obtaining, by a corrected charging current acquiring unit, a corrected charging current A according to a formula A=A