The charging methods of lead-acid batteries and lithium batteries are completely different, so what is the charging process of lithium batteries?

　　The charging process of lithium batteries can be divided into four stages: trickle charge (low-voltage pre-charge), constant current charge, constant voltage charge, and charge termination.

　　Stage 1: Trickle charge

　　Trickle charge is used to pre-charge completely empty battery cells first. The trickle charge current is one-tenth of the battery capacity, which is 0.1C.

　　Phase 2: Constant current charging

　　When the voltage of the lithium battery rises above the voltage threshold of trickle charging, increase the charging current for constant current charging. The current for constant current charging is between 0.2C and 1.0C.

　　Phase 3: Constant voltage charging

　　When the voltage of the lithium battery pack rises to the threshold of constant voltage charging, the lithium iron phosphate battery is 3.65V, the constant current charging ends, and the constant voltage charging phase begins. At this time, it can be seen that the charging voltage remains unchanged and the charging current gradually decreases.

　　Stage 4: Charge termination

　　Generally, use the minimum charge current to judge. When the charging current decreases to the range of 0.1C to 0.05C, the charging is terminated.

　　The above is the process of the conventional charging mode of the lithium battery.

　　Lithium-ion battery (LIB) has become the main energy storage solution in modern social life. Among them, lithium iron phosphate batteries are a perfect replacement for lead-acid batteries, and they are the first choice for grid-connected peak shaving, off-grid energy storage, photovoltaic energy storage, UPS, data center and other industries.