Circuit for solving trickle charging of S3R power supply system under normal illumination condition

A circuit method for solving trickle charging of an S3R power supply system under the condition of constant illumination comprises the steps that in the constant illumination period of a satellite, an enabling switch is turned on, BEA signals are obtained by collecting the voltage of a storage battery, then whether domain division signals are effective or not is controlled, a hysteresis comparison circuit is actually a hysteresis comparator, and in the charging process, when the voltage of the storage battery is lower than a set value VBth-, the threshold value VBth-is smaller than the threshold value VBth-, and the threshold value VBth-is smaller than the threshold value VBth-; a BEA signal is in a low level, triodes Q1 and Q2 are cut off, at the moment, a domain dividing signal is effective, PWM output is effectively adjusted, the charging function is achieved, when the voltage of a storage battery continuously rises to the state that when the voltage of the storage battery is higher than a set value VBth +