Basically if you figure a EB battery weighs 1000 lbs and 10 gallons of gas plus the tank weighs 75lbs.
Gets a lot better when you include the weight of a gasoline engine plus transmission vs an inverter and electric motor. The difference there is a few hundred lbs.
Take away is even what seems like small improvements in power density saves a lot of weight. Increase the density by 10% and you shave 90lbs off the battery and reduce the cars weight by 4%. Your gain is more than the reduction of the weight of the battery because cascading reductions in the weight of the cars structural elements.
The torque required for an electric vehicle to climb a slope quickly drains the battery (if the electric motor can climb it, and if the refrigeration can manage the temperature rise along the climbing time [hill, road, etc; constant torque]).
Combustion engines have a high torque, and these variables should be included in the equation. IMHO, it should be mandatory to include in the electric vehicle specification the range with a 14-20% of slope/gradient[1], including the speed.
[1] although it does exist some ways with 30% of slope, some wicked garages included.
Gets a lot better when you include the weight of a gasoline engine plus transmission vs an inverter and electric motor. The difference there is a few hundred lbs.
Take away is even what seems like small improvements in power density saves a lot of weight. Increase the density by 10% and you shave 90lbs off the battery and reduce the cars weight by 4%. Your gain is more than the reduction of the weight of the battery because cascading reductions in the weight of the cars structural elements.