Introduction to the correct charging of lithium-ion batteries

The safe working voltage range of lithium-ion battery is 2.8~4.2V, lower or higher than this voltage range, the lithium in the battery becomes very unstable and even causes accidents. In order to ensure that the battery is in a safe range, a special charger is required. These chargers automatically adjust the charging method according to the current state of the battery. 2. Before activating the lithium-ion charger to start charging, it will supply the battery with a small current, and test the battery voltage change at the same time, and gradually increase the current until the set value. This process can be seen as a kind of activation or detection charging. 3. The constant current variable voltage charging charger charges the battery with a constant current. As the battery voltage increases, the charger increases the charging voltage at the same time to speed up the charging speed. 4. When the battery reaches the 4.2V cut-off voltage, the battery will only charge about 70% of the charge (not full). At this time, the charger continues to charge the battery with a constant voltage and a gradually decreasing current, and the charging is stopped until the battery voltage continues to rise after the value is less than 0.1A. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Why are more and more solar lights using lithium-ion batteries?