The calculation principle of the range of electric motorcycles is mainly based on the law of conservation of energy. By analyzing the energy stored in the battery, the energy consumed by the motor, and the energy loss during the driving process, the maximum driving distance of the vehicle under specific conditions is comprehensively obtained. The following are the specific principles and key steps:
1、 Core formula
Range (km)=Total battery energy (Wh) ÷ Energy consumption per kilometer (Wh/km)
or
Range (km)=Battery Capacity (Ah) × Battery Voltage (V) ÷ Energy Consumption per Kilometer (Wh/km)
2、 Key parameter analysis
Total battery energy (Wh)
Formula: Battery Capacity (Ah) x Battery Voltage (V)
Example: If the battery capacity is 20Ah and the voltage is 48V, the total energy is 960Wh (i.e. 0.96kWh) by multiplying 20Ah by 48V.
Energy consumption per kilometer (Wh/km)
Affected by factors such as vehicle weight, driving speed, road conditions, driving habits, motor efficiency, and wind resistance.
Simplified estimation:
Urban commuting (low-speed, frequent start stop): about 15-30Wh/km
High speed cruising (above 60km/h): approximately 30-50Wh/km
Load capacity or climbing: Energy consumption may double.
Motor efficiency
The efficiency of converting electrical energy into mechanical energy by a motor is usually between 80% and 95%.
Actual available energy=total battery energy x motor efficiency.
Example: If the motor efficiency is 90%, the actual available energy of a 960Wh battery is 864Wh multiplied by 90%.