Electrochromic films have been widely used in the shading of glass curtain walls and greenhouses because of their stable optical properties and easy control. A hybrid photovoltaic power supply system for electrochromic films is designed to solve the problems of insufficient environmental protection, high energy consumption and poor voltage matching. The system has obvious advantages of energy saving, environmental protection, stability and reliability. In this paper, the circuit structure, working principle, control strategy, simulation and experimental tests are analyzed in detail. The hybrid photovoltaic power supply system will be introduced in detail from the following four aspects: photovoltaic module design, battery charge and discharge control circuit design, photovoltaic power supply system backup circuit design and system integration.

Electrochromic films;hybrid PV;hybrid power supply system