The invention discloses an electric automobile power supply free of external charging. The electric automobile power supply comprises an energy storage cell which is used for charging a power cell or directly driving a motor, an energy storage cell control unit which is used for controlling the energy storage cell and adjusting the start and stop and the output power of the energy storage cell by controlling the gas, water and heat inside the energy storage cell, the power cell which is used for directly providing electric energy for the motor and maintaining the normal rotating power of the motor in an electric automobile through receiving the electric energy which is provided by the energy storage cell, a power cell management unit which is used for controlling the discharging and the charging of the power cell, a DC (Direct Current)/DC (Direct Current) converting unit which is used for converting the direct current voltage which is fluctuant in a fixed range into the voltage which can be loaded on the power cell, and a power system control unit which is used for adjusting the power generation of the energy storage cell and the charging and discharging of the power cell, and providing the electric energy for the motor. According to the electric automobile power supply free of external charging, a fuel cell is used as the energy storage cell and used for assisting electricity supply, the real-time charging of the electric automobile is realized, and an external charging interface is not needed.