How many hours does it take to fully charge 6 batteries at 72V?
2 Answers
72V batteries generally take about 8 hours for the first charge to reach full capacity. Subsequent charging times depend on the remaining battery level and charging frequency. If charging daily, 6-8 hours is sufficient. If charging only after complete discharge, it is recommended to charge for 8-10 hours. Below are some precautions for charging new electric vehicles: 1. First charge: Avoid waiting until the battery is completely drained and try to charge during the day, ensuring it reaches full capacity within 5-6 hours. 2. Second charge: You may opt for a deep discharge followed by a prolonged charge lasting 8-9 or even 10 hours to allow the battery to undergo a complete chemical reaction cycle. 3. Placement: Do not place the charger on objects prone to heat or combustion, and avoid placing it on the electric vehicle's seat to prevent fire hazards.
My electric motorcycle uses a 72V system composed of 6 batteries, and the charging time really can't be generalized. It mainly depends on your battery capacity. For common 20Ah models with a standard 5A charger, it usually takes about four to six hours. This doesn't even account for battery aging or environmental temperature effects—charging might be slower in winter. I often advise friends to first check the capacity number on the battery manual and then compare it with the current rating on the charger label—just divide to get a rough estimate. Never rush by using a high-current charger, as it can easily damage the battery or even cause a fire. Developing regular maintenance habits can extend battery life, like performing a deep discharge once a month to ensure more even charging and higher efficiency. Always charge in a well-ventilated area—safety first.
