How many hours should a new battery be charged for the second time?
1 Answers
Electric vehicle batteries use lead-acid power batteries. Since lead-acid batteries have no memory effect, there is no need to deliberately discharge the battery completely and then recharge it for three cycles. Simply choose a reasonable charging time based on power usage. When the battery is 100% discharged, using a matching charger typically requires a charging time of about 8~10 hours, but it should not exceed 12 hours (as this may affect battery lifespan). It is not recommended to fully discharge the battery every time it is used. Generally, it is advised to recharge when the remaining power is around 70%, with a charging time of 6~8 hours. Most chargers for electric vehicle batteries use a three-stage charging mode: 1. First stage: Constant current with voltage limitation. For example, when charging a 48V20AH battery pack, the current value is usually 3A, and the voltage limit is 59.2V. 2. Second stage: Constant voltage with current limitation, until the current drops to the jump current value, transitioning to the next step. The constant voltage is 59.2V with a current limit of 3A, until the current drops to 0.55A for the jump. 3. Third stage: Trickle float charging, also known as maintenance charging, with a float voltage of 55.2V and a current limit of 0.55A. This stage usually lasts 2~3 hours before power is cut off.
