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What is the Conventional Charging Process of Li-ion Batteries?
2022-03-10
The charging or discharging rate is usually referred to as the C-rate, which is equal to the charging or discharging current under specific conditions.
In general, the charging process of Li-ion batteries can be divided into four stages: trickle charging, constant current charging, constant voltage charging, and the end of charging.
Stage 1: Trickle Charge - This stage starts by charging the depleted battery cells. The trickle charge current is one-tenth of the battery capacity or 0.1c.
Stage 2: Constant-current charging - When the lithium battery voltage rises above the voltage threshold for trickle charging, the charging current is increased for constant-current charging. The constant current charging current is between 0.2C and 1.0C.
Stage 3: constant voltage charging - when the lithium battery pack voltage rises to the threshold of constant voltage charging (for example, lithium iron phosphate is 3.65V), constant current charging ends and the constant voltage charging stage begins. At this time, you can see that the charging voltage remains unchanged and the charging current gradually decreases.
Stage 4: end of charging - generally judged by the minimum charging current. When the charging current decreases to the range of 0.1C to 0.05C, the charging is stopped.
The above is the process of the regular charging mode of lithium battery.
In general, the charging process of Li-ion batteries can be divided into four stages: trickle charging, constant current charging, constant voltage charging, and the end of charging.
Stage 1: Trickle Charge - This stage starts by charging the depleted battery cells. The trickle charge current is one-tenth of the battery capacity or 0.1c.
Stage 2: Constant-current charging - When the lithium battery voltage rises above the voltage threshold for trickle charging, the charging current is increased for constant-current charging. The constant current charging current is between 0.2C and 1.0C.
Stage 3: constant voltage charging - when the lithium battery pack voltage rises to the threshold of constant voltage charging (for example, lithium iron phosphate is 3.65V), constant current charging ends and the constant voltage charging stage begins. At this time, you can see that the charging voltage remains unchanged and the charging current gradually decreases.
Stage 4: end of charging - generally judged by the minimum charging current. When the charging current decreases to the range of 0.1C to 0.05C, the charging is stopped.
The above is the process of the regular charging mode of lithium battery.
