High-voltage system of electric automobile, high-voltage control method and electric automobile

The invention discloses a high-voltage system of an electric automobile, a high-voltage control method and the electric automobile, the high-voltage system comprises an integrated loop, and a current collection loop is used for collecting residual electric quantity of a high-voltage load part in a high-voltage load loop under a high-voltage power-off working condition; and in a pre-charging working condition before high-voltage power-on, the stored electric energy is charged into the high-voltage load loop, and the integrated loop is connected to the two ends of the high-voltage load loop. According to the invention, energy during voltage unloading is properly collected and converted into pre-charging energy during power-on of the vehicle. Therefore, voltage unloading can be accelerated, the safety of a vehicle power grid is guaranteed, the national standard compulsory requirement is met, and energy can be recycled. And the electric vehicle is more suitable for the development trend of voltage platform rising