Novel photovoltaic storage battery charging circuit

The utility model provides a novel photovoltaic storage battery charging circuit. An output end of a solar cell is connected with an input end of a DC voltage boosting circuit, an output end of the DC voltage boosting circuit is respectively connected to positive and negative electrodes of a storage battery, and a feedback circuit led out from the storage battery is connected with the DC voltage boosting circuit; the DC voltage boosting circuit comprises a first diode D1, an impedance source network, a metal oxide semiconductor field-effect transistor, a filtering capacitor C0 and a second diode D2; and the first diode D1 is connected with the impedance source network in series, the metal oxide semiconductor field-effect transistor is connected with the filtering capacitor C0 in parallel, and the second diode D2 is serially connected between the MOS transistor and the filtering capacitor C0. The novel photovoltaic storage battery charging circuit has the beneficial effects that the circuit is simple in structure, only one metal oxide semiconductor field-effect transistor is adopted, the circuit has high output voltage gain, voltage stress of the capacitors in the impedance network is low, a starting shock problem does not exist in the circuit, and the output capacitor cannot cause instant current shock on the MOS transistor at the moment the MOS transistor is switched on.