The latest video from Engineering Explained tackles one of the biggest problems with electric cars—energy density. Using a gallon jug of water to represent the volume of a gallon of gasoline, Jason Fenske proceeds to lay out 12-ounce beverage cans to show how many current lithium-ion batteries it would take to match the gasoline’s energy content by volume. It’s an eye-opening 139 cans for 13 times as much volume. The cans also represent the fact that battery packs are made of hundreds or thousands of smaller individual cells that aren’t totally space-efficient. The more damning metric is weight, as lithium-ion batteries weigh 50 times as much as an equivalent amount of energy stored in gasoline.
This is a companion discussion topic for the original entry at https://www.hagerty.com/articles-videos/articles/2020/02/12/problem-with-electric-cars-energy-density