cartechboy writes "Electric vehicle batteries have three problems — they're big, heavy, and expensive. But what if you could shift EV batteries away from being big blocks under the car and engineer them into the car itself? Research groups at Imperial College London working with Volvo have spent three years developing a way to do exactly that. The researchers are storing energy in nano structure batteries woven into carbon fiber--which can then be formed into car body panels. These panel-style batteries charge and store energy faster than normal EV batteries, and they are also lighter and more eco-friendly. The research team has built a Volvo S80 prototype featuring the panels where the battery panel material has been used for the trunk lid. With the materials used on the doors, roof and hood, estimated range for a mid-size electric car is around 80 miles."