How many hours does it take to fully charge 6 batteries at 72V?
3 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.
I personally own an electric bicycle with a 72V system and six batteries. It usually takes about five to seven hours to fully charge. The exact time really depends on the situation: if the battery capacity is 30Ah and the charger outputs 8A, it might take around three to four hours; but with a 15Ah battery and a 3A charger, it could take over seven hours. I usually start charging at night, so it's fully charged by the next morning, which is quite convenient. Also, remember not to let the battery get too hot during charging—it's safer to place it in a shady spot. For new batteries, the first few charges take longer, which is part of the normal activation process. Overall, it's best to check your device's specifications rather than guessing, to avoid wasting electricity or causing damage.
