Storage battery charge and discharge management system of independent photovoltaic system

The utility model relates to a storage battery charge and discharge management system of an independent photovoltaic system. The storage battery charge and discharge management system comprises a photovoltaic power supply assembly, a direct current controller and an inverter, wherein the direct current controller is electrically connected with the photovoltaic power supply assembly and the inverter; positive and negative output ends of the direct current controller are respectively connected with a direct current bus, a plurality of charge and discharge units are connected in parallel on the direct current bus, and each charge and discharge unit comprises a bidirectional DC/DC converter and a storage battery that are electrically connected; a detection control assembly is in communication connection with the direct current controller, the inverter and the bidirectional DC/DC converters through 485 communication lines; the detection control assembly comprises an STM32F0 one-chip microcomputer and an peripheral circuit connected with the STM32F0 one-chip microcomputer; the peripheral circuit comprises a crystal oscillator circuit, a resetting circuit, an interface circuit, an external storage circuit, a clock circuit and an asynchronous communication circuit. The management system is capable of realizing maximize charging efficiency, software-free property, high efficiency, reliability, long overall service life, flexibility, easy-to-expand property, low price and easy-to-popularize-and-apply property.