Pulse modulation charging method and apparatus

A pulse modulation charging apparatus for charging a rechargeable battery device, comprising:

• a pulse current generating module, for providing a current pulse to the rechargeable battery device;
• and
• a control module, set with a first voltage threshold value, and configured to continuously monitor a terminal voltage of the rechargeable battery device;
• wherein the control module is configured to initially control the pulse generating module to repeatedly charge and discharge the rechargeable battery device according to a first charge-discharge cycle, and when the terminal voltage is greater than the first voltage threshold value, to control the pulse current generating module to repeatedly charge and discharge the rechargeable battery device according to a second charge-discharge cycle;
• wherein the first charge-discharge cycle comprises a first charge current pulse width and a first discharge current pulse width, the first charge current pulse width being greater than the first discharge current pulse width, and the second charge-discharge cycle comprises a second charge current pulse width and a second discharge current pulse width, the second charge current pulse width being shorter than the first charge current pulse width.