Hybrid energy storage solar street lights come out, battery life is extended

A few days ago, the research on hybrid energy-storage solar street lamps completed by Beihua Institute of Aerospace Engineering passed the expert appraisal. The expert group believes that this technology has the characteristics of energy saving and environmental protection, high stability in use, and long battery life, and the overall level has reached the leading domestic level. Aiming at the problems of short battery life, low power density, slow discharge speed and weak current that cannot be charged in the use of traditional solar street lights, this project proposes a solar LED street light model and implementation method that uses supercapacitors and batteries to form a hybrid energy storage unit. Through the comprehensive use of power electronics technology, single-chip technology and automatic control technology to develop hybrid energy storage solar LED street lights, two sets of buck-boost bidirectional power converters are used in parallel to realize energy conversion between super capacitors and batteries; The optimal charging and discharging state adopts double hysteresis loop to realize intelligent control, which optimizes the battery charging and discharging device. At the same time, the use of the energy storage capacity of the supercapacitor reduces the number of small charging cycles caused by the interruption of photovoltaic power generation.