Micro power battery pack, micro photovoltaic inverter device with safety control

Abstract

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.

Description

technical field [0001] The invention belongs to the field of applied electronics, and in particular relates to a micro-power battery pack and a micro-photovoltaic inverter device with safety control. Background technique [0002] The energy storage battery in the micro photovoltaic inverter device is prone to overheating and damage, which will further cause system damage. [0003] Instant self-test during circuit operation is of great significance to prevent circuit safety problems. There is no instant test method for diodes whose negative pole is connected to the high voltage pole of the power supply in the prior art, that is to say, when the positive pole of a diode is connected to the high voltage pole of the power supply In the case of a sudden open circuit of the diode (due to breakdown, burning, etc.), it is difficult for the circuit to be detected immediately by the self-test circuit or program, which is a huge trouble for the instant detection circuit failure; Addin...

AI Technical Summary

Problems solved by technology

[0002] The energy storage battery in the micro photovoltaic inverter device is prone to overheating and damage, which will further cause system damage

[0003] Instant self-test during circuit operation is of great significance to prevent circuit safety problems. There is no instant test method for diodes whose negative pole is connected to the high voltage pole of the power supply in the prior art, that is to say, when the positive pole of a diode is connected to the high voltage pole of the power supply In the case of a sudden open circuit of the diode (due to breakdown, burning, etc.), it is difficult for the circuit to be detected immediately by the self-test circuit or program, which is a huge trouble for the instant detection circuit failure; Adding a fuse to the battery can prevent the battery from being damaged due to excessive current. However, after the fuse breaks, the battery cannot continue to charge and discharge, which damages the vertical capacity of the battery pack. Replacement is carried out during the overall maintenance of the battery pack, which requires interruption of the battery pack as a whole, which is not good for systems that require continuous operation of cached power

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