The present invention belongs to a fuel accumulator power supply system for electric vehicle, relates to booster car and tricar which uses fuel accumulator as power supply and fuel accumulator of motor vehicle. In all the vehicles using fuel cell two sets of fuel accumulator can be used, when one set of fuel accumulator is used, another set of fuel accumulator can be used for stand-by, when the accumulator of one set of fuel accumulator is completely consumed, another set of fuel accumulator can be started to use, and the waste accumulator can be replaced in fuel accumulator station or the accumulator can be added. When the motor vehicle has need of high power supply, two sets of fuel accumulator can be series-connected or parallelly-connecte for use. |