The invention discloses a micro-source
battery pack, which comprises a plurality of
power storage modules, a control module, an isolation
diode, a second power source point, a power source input point, a power source output point, and a
public place. Each of the
power storage modules comprises an input node, an output node, a fuse, a second
resistor, a first
resistor, a first
capacitor, a first
inductor, a first
diode, a second
capacitor, a second
diode, a third diode, a number zero sampling
resistor, a number one sampling resistor, a switch, a rechargeable battery, a power source place, a single-
chip microcomputer, a bootstrap node, a sampling node, and an
optical coupler. The mini-sized
photovoltaic inverter device having the
safety control function is provided with the above mentioned micro-source
battery pack. According to the invention, the costs are low, the application is flexible, the service lifetime is long, the breaking is not easy to occur, and the use is stable and reliable; whether the open circuit of the diode, the
anode of which is connected with the
high voltage pole of the DC power source, exists can be detected by adopting the
electric energy test in the running state of the DC power source, and the open circuit of the fuse can be detected by the bypass in a real-time and reliable manner.