How many kilometers can a 45 battery run?
2 Answers
A 45 battery can run 88 kilometers. The driving range is related to the engine power and battery capacity. For example, with a motor power of 1000W and a battery of 48V45AH, the theoretical driving range can reach 88 kilometers. Here are the extended details: 1. The calculation process of the theoretical driving range is as follows: constant speed average current = power/voltage = 1000W/48V = 20.8A; driving time = battery capacity/average current = 45AH/20.8A ≍ 2.2 hours; calculated at a speed of 40 kilometers per hour, the theoretical driving range = 2.2 * 40 = 88 kilometers. 2. Factors affecting the driving range: When the electric vehicle's load increases, the motor's output torque increases, and the power increases, resulting in a shorter driving range. It is also related to the driving conditions and environmental temperature. When the road conditions involve frequent climbing or starting, the range will be shortened because the current during climbing and starting is higher than the average current, thus reducing the time. Changes in environmental temperature also affect the battery capacity; the higher the temperature, the slightly higher the capacity, and the lower the temperature, the slightly lower the capacity.
I've driven many cars, and there's really no fixed number for how far a 45Ah battery can go. Whether you turn on the AC makes a huge difference. I once tried driving on the elevated road with the AC on, and the battery was almost dead after just 30 kilometers at most. It's even worse with an older car, especially in winter when the battery drains particularly fast during startup. There was this one time with my old car when I was waiting at a red light with the headlights on, and the battery level just kept dropping rapidly—it scared me so much that I immediately turned off the engine. My advice is that a new car should at least be able to run about 40 kilometers, but don't push it to the limit. It's safer to leave some margin for emergencies.
