Control method of hybrid power system, controller and hybrid power system

The invention relates to a control method of a hybrid power system, a controller and the hybrid power system. When it is identified that the battery charging capacity of the hybrid power system is seriously insufficient due to a special working condition, a control mode of a motor of the hybrid power system can be switched into a voltage control mode in time; at the moment, the target working current of the battery of the hybrid power system under the special working condition can be calculated, control parameters including the target working voltage of the motor are generated according to thetarget working current; therefore, the motor can adjust the output torque in real time according to the control parameters and stably work in the voltage control mode; and the actual working currentof the battery reaches the target working current so that the hybrid power system can continuously and stably operate under the special working condition, the probability that the battery reports an overcurrent fault or is dam