The chemical property of lithium is very active, and it is easy to burn. When the battery is discharged and charged, the internal temperature of the battery will continue to rise. The gas in the activation process will expand, and the pressure in the battery will increase until the pressure reaches a certain degree.
1. Charging:
The safe operating voltage range of lithium battery is 2.8~4.2V, below or above this voltage range, lithium ions in the battery become very unstable, even cause accidents. To ensure that the battery is in the safe range, so special charger. These chargers automatically adjust the charging mode based on the current state of the battery.
2. Activation:
Before charging, the charger 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 thought of as an active or probing charge.
3. Constant rheological voltage charging:
The charger charges the battery with a constant current, and as the battery voltage increases, the charger simultaneously increases the charging voltage to speed up the charging.
4. Variable current and constant voltage charging:
When the battery reaches 4.2V, the battery is only running at about 70% of its full charge. At this time, the charger will continue to charge the battery with A constant voltage and A gradually decreasing current. When the value is less than 0.1a, the charger will stop charging until the battery voltage continues to rise.
