“Electric vehicles won’t just replace cars with conventional engines, but they will bring a huge change to the entire car industry,” Mr. Lu said. “We wanted to be part of this revolution.” The result is the K50. Designed at his research center, the two-seater has a light, carbon fiber exterior and a console stuffed with touch screens. Rows of batteries propel the roadster to a top speed of about 120 miles per hour and carry it as far as 200 miles on a single charge.