Pulse modulation charging method and apparatus

摘要

A pulse modulation charging method is provided for charging a rechargeable battery device. In the method, a current pulse is provided according to a charge-discharge cycle, the rechargeable battery device is charged repeatedly with a charge current pulse width, and the rechargeable battery device is discharged with a discharge current pulse width. In addition, in the method one or more voltage threshold values are further designated. When a terminal voltage of the rechargeable battery device is greater than the voltage threshold value, the charge current pulse width is gradually reduced, so as to improve charge efficiency for charging the rechargeable battery device. A pulse modulation charging apparatus is further provided, which is used for charging the rechargeable battery device according to the steps described here.

主权项

1. A pulse modulation charging method for charging a rechargeable battery device, comprising:
setting a first voltage threshold value; providing a current pulse according to a first charge-discharge cycle, wherein the first charge-discharge cycle comprises a first charge current pulse width and a first discharge current pulse width for charging and discharging the rechargeable battery device, and the first charge current pulse width is greater than the first discharge current pulse width; repeatedly charging and discharging the rechargeable battery device according to the first charge-discharge cycle; adjusting the current pulse to a second charge-discharge cycle when the terminal voltage of the rechargeable battery device greater than the first voltage threshold value, wherein the second charge-discharge cycle comprises a second charge current pulse width and a second discharge current pulse width, and the second charge current pulse width is shorter than the first charge current pulse width; and repeatedly charging and discharging the rechargeable battery device according to the second charge-discharge cycle.