Independent photovoltaic power generation system charge and discharge control tactic

In order to improve the efficiency of the battery charge and extend the battery life,developed a new charge-discharge control tactic which uses dual batteries to replace the previous single battery.In the whole process of charging with the photovoltaic system,the charging voltage of the termination based on the battery charge voltage and internal temperature characteristics;at the same time with voltage,temperature differential fuzzy control algorithm can prevent the external light intensity,temperature and environment change as a result of battery charge in advance of the removal,and can protect the battery overcharge as well.Simulation results show that the control tactic gets a significant high-efficiency battery charging and extend battery life.