What are the essentials for correct charging of lithium-ion batteries?

The safe working voltage range of lithium-ion batteries is 2.8~4.2V. The lithium ion in the battery below or higher than this voltage range becomes very constant, and even causes chaos. In order to ensure that the battery is in a safe range, a special charger is required. 2. Before activating the lithium-ion battery charger to start charging, it will supply the battery with a small current, and at the same time detect the battery voltage change, and gradually increase the current until the set value. 3. The constant-current variable-voltage charging charger charges the lithium-ion battery with a constant current. As the battery voltage increases, the charger increases the charging voltage at the same time to accelerate the charging speed. 4. Variable-current constant-voltage charging. When the lithium-ion battery reaches the 4.2V cut-off voltage, the battery will only enter about 70% of its power (not full) at this time. At this time, the charger continues to charge the battery with a constant voltage and a gradually decreasing current, and the charging is stopped when the battery voltage continues to rise when 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 post: Do you know how to delay the life of lithium-ion battery electric vehicles?