2023-09-01
The battery itself will have a certain amount of self-leakage, and the protection board will also have a microampere level of power consumption, so in long-term storage, it is necessary to regularly measure the voltage and supplement the charge.
First, constant current charging: this method is still from the previous and the previous circuit, but the high charging current is limited, constant current constant voltage is actually the current limiting voltage, this circuit is more popular, such as Nanfu, and Xinyu flow, full of incomplete cut-off, to trickle floating charge. It is now believed that a long period of small current charging is one of the causes of battery bloating.
Second, high-voltage charging: This charging method does not have a special control circuit, directly using a 5V source (or a series of diode step-down) to charge the battery with a protection board, completely dependent on the high-voltage limit of the protection board. It is characterized by a large current at the beginning, and then gradually reduce, and float at any time.
Third, intelligent charging: this is now considered to be the ideal charging management method, following the charging algorithm mentioned at the beginning of this section, integrated in a small patch IC, the peripheral circuit is simple, stable and reliable, such as TP4054/4055