How many kilometers can a 72V 20Ah graphene battery run?
2 Answers
The theoretical driving range is around 108 kilometers. However, in actual road conditions, achieving about 80 kilometers is quite normal. The calculation is as follows: 1. Average current at constant speed: Power/Voltage = 1500W/72V = 20.8A; 2. Theoretical driving time: Battery capacity/Average current = 50AH/20.8A = 2.4 hours. More relevant information is as follows: 1. Charging: A full charge after complete discharge requires about 4.06 kWh of electricity. The charging capacity is generally 1.05 times the battery's discharge capacity. The electricity consumption is calculated based on the charging voltage: Electricity consumption = Charging voltage * Battery rated capacity * 1.05. 2. Calculation process: Required charging capacity = 50 * 1.05 = 52.5AH. Electricity consumption = 52.5 * 77.4 (average charging voltage) = 4063.5WH.
As someone who frequently tinkers with electric vehicles, I believe the key to the range of a 72V 20Ah graphene battery lies in how you use it. Theoretically, this battery has an energy capacity of around 1,400 watt-hours. For a typical electric scooter or motorcycle, the power consumption per kilometer is about 50 to 70 watt-hours, so a full charge can last approximately 60 kilometers, but this isn't absolute. There are too many influencing factors—for example, carrying more passengers or heavy cargo will immediately reduce the range; driving faster also consumes more power; and in cold weather, the battery's efficiency drops, possibly reducing the range to just 50 kilometers. I recommend maintaining a steady driving style in daily use, avoiding sudden braking or acceleration, which can save you 5 to 10 kilometers. The advantage of graphene batteries is their extremely fast charging—they can reach over half capacity in just 20 minutes—and they are more durable than lead-acid batteries, with a longer overall lifespan. This makes them much more cost-effective for those who enjoy long rides.
