How many hours does it take to fully charge a 72V battery with 6 cells?

[Leonardo]

For the first charge, it is recommended to charge for 8 hours. Subsequently, the charging time should be adjusted based on the remaining battery level and charging frequency. If charging daily, 6-8 hours of charging is sufficient. If charging only after the battery is completely depleted, it is recommended to charge for 8-10 hours. Below is some relevant information about battery voltage: 1. Method to determine if the battery is fully charged: The charging current will decrease. Additionally, the generator internally has a voltage regulation module that controls the output voltage, with the precise ideal voltage being 14.2V, with an error margin of ±0.2V. The voltage is generally also 14V, but it may vary with engine speed. However, due to the generator regulator, the maximum output voltage is 14V. 2. Battery maintenance methods: When the battery is not in use, it should be charged once a month to extend its lifespan. To prevent damage to the battery, regular inspections are necessary. Try to avoid instantaneous high-current discharge.

[DelLondyn]

As a regular at an electric vehicle repair shop, I'd like to share some insights about charging a 72V system with six batteries. The charging duration mainly depends on two key factors: the total battery capacity (measured in ampere-hours, Ah) and the charger's output current (measured in amperes, A). Take a common example: assuming each battery has a 20Ah capacity, the total would be around 120Ah. Using a standard 5A charger, the time would be capacity divided by current—120÷5=24 hours, but that seems too long, right? In reality, EV battery packs are usually connected in series, so the total capacity remains at the single-battery level of 20Ah. With a 5A charger, it takes about 4 hours. But if you use a faster 10A charger, it might drop to around 2 hours. Note that temperature and battery age also affect efficiency—charging slows in winter, and older batteries take longer. A word of caution: avoid using excessively high-current chargers for speed, as this can cause overheating or shorten battery life. Generally, 5-7 hours is reasonable, but check your manual for specifics. Also, charge in a suitable location—avoid damp or high-temperature environments to reduce fire risks. Safe charging habits can extend battery life by a year or two.

[Maximus]

As a regular electric vehicle owner, I usually charge my 72V battery pack consisting of 6 batteries overnight, which takes about 6-8 hours. This is mainly because the battery capacity typically ranges between 20Ah and 30Ah. With a 5A charger output, a simple calculation would be capacity divided by current, resulting in 4 to 6 hours. However, in my actual experience, the 20Ah battery in my vehicle shows a green light (indicating full charge) after just over 4 hours with the original 5A charger. If you have a larger battery or a more powerful charger, say 10A, the charging time might be shorter, but charging too fast is not battery-friendly and can lead to premature failure. I recommend choosing a stable output charger and not skimping on quality by buying off-brand products to avoid voltage instability. During charging, ensure proper ventilation—preferably in a garage or a semi-shaded outdoor area. It's common sense to monitor the indicator lights: stop charging when it's red and continue when it's green. Regular maintenance like this can help improve driving range. In short, there's no need to rush; you can simply charge it overnight while you sleep peacefully.

[VanDylan]

I've been playing with electric vehicles for over a decade and am thoroughly familiar with charging 72V battery packs. Fully charging six batteries usually takes 5-7 hours, depending on the battery condition. For standard capacities like 20Ah, a 5A charger takes about 4 hours; but if the batteries are aging or the temperature is low (like below freezing in winter), the time extends to over 6 hours. Don't use too strong a charger—5A is more balanced to avoid internal damage to the batteries. The key is matching—don't randomly use a charger with the wrong voltage, or you might ruin the batteries. Safety tip: Place the charger in a ventilated area, away from flammable materials—I've seen accidents happen. Estimating is simple: Divide the capacity by the current to get the hours. Regularly replacing old batteries can save time.