The Research Of Peripheral Circuits Design And Algorithms Realization Based On Li-ion Batteries

Li-ion battery is preferred in the demand of high dependency and safety because of its high energy-weight ratio, high voltage and memoryless effect .While the control management on it is remarkably different from traditional Ni-Cd, Ni-H batteries for its characteristics. Therefore the research based on Li-ion battery is significant to promote the development of micro-satellite.Peripheral circuits design and algorithms realization based on Li-ion batteries is foundational to use Li-ion batteries safely and effectively. In this thesis, circuits of equalization, protection and S4R are researched and designed.Firstly the research significance is introduced and the backgrounds both in and abroad are supplied.Then the research content is totally introduced from hardware and algorithm. Hardware is divided into three modules: charge-shunt-discharge module, equalization module and protection module. Algorithm is divided into equalization and fuzzy control. The suitable circuits and algorithms are selected by compare.Thirdly charge-shunt-discharge module using S4R method, equalization module using average voltage, protection module using MM1414, and system implementation of fuzzy control algorithm are analyzed. The relationship between equalization and protection is discussed.Finally the debugging results of all the circuits and algorithms are analyzed. After debugging the whole system, some tests are carried out. The results indicate that the algorithm is correct and the circuit design is useful.