What is the reason why new energy vehicles can't start with electricity?

The reason why new energy vehicles can't be started by electricity is because there is carbon deposit in the accelerator, which can be removed. New energy brands include BYD Yuan New Energy, Roewe ei6, Roewe e550, BMW i8 and BMW i3. Take Yuanxin Energy 20 19 EV360 Zhilian as an example: the manufacturer of this car is BYD, the level is small SUV, and the energy type is pure electric. The length, width and height of the car are 4360mm, 1785mm and 1680mm respectively, and the wheelbase is 2535 mm The body type is a five-door five-seat SUV, the gearbox is an electric single-speed gearbox, and the driving mode is a front drive.