Refrigeration control system and method for hybrid electric vehicle

The invention provides a refrigeration control system and method for a hybrid electric vehicle, and the method comprises the steps: obtaining the discharge current of a power battery, the temperature of a battery cell and the state of charge (SOC) of the battery cell, so as to obtain Joule heat, reaction heat and polarization heat generated by the power battery, and further obtain the heat generated by the battery cell; multiplying the heat generated by the battery cell by a self-heat dissipation coefficient to obtain the refrigeration demand of the battery cell; the set temperature difference in the cab is obtained, and the refrigeration demand quantity of the cab is calculated; and the rotating speed of an air conditioner compressor is obtained through adjustment according to the battery cell refrigeration demand quantity and the cab refrigeration demand quantity, and the opening degrees of a first electromagnetic expansion valve and a second electromagnetic expansion valve corresponding to power battery re