Lithium battery charging voltage and current

When the battery voltage is greater than the preset voltage threshold and less than the maximum voltage of 4.2V, the IC will charge the battery with the maximum charging current set by the external resistor at this time. Charge the battery voltage to the maximum charging voltage (around 4.2V). As the charging time increases, the voltage of the lithium battery cell gradually rises. The charger is also constantly adjusting the output voltage. When the output current is less than 2A, as the voltage of the lithium battery pack increases, the charging current gradually decreases. It can be considered that it has entered the constant pressure stage. When the voltage of a certain string of cells in the battery pack reaches and exceeds 4.2V, the protection board is released in time to cut off the input. ●Current: Lithium battery charging requires constant current charging first, that is, the current is constant, and the battery voltage gradually increases with the charging process, when the battery terminal voltage reaches 4.2V (4.1V), the constant current charging is changed to constant voltage charging, that is, the voltage Certainly, the current gradually decreases with the continuation of the charging process according to the saturation of the battery cell. When it decreases to 0.01C, the charging is considered to be terminated. In addition, the national standard stipulates that the charging time should not exceed 8 hours, that is, even if it has not reached 0.01C, the charging is considered to be over after 8 hours. Regarding lithium battery packs with ever-increasing capacity, it is impossible to increase the charging current value in order to achieve such a satisfactory charging rate. 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: What should I pay attention to when using mobile phone batteries in winter?