Analysis, Design, and Implementation of Bidirectional Buck-Boost Converter with Energy Transfer Capacitor and Its Application to Battery Equalization

• Main Authors: Min Liu, 劉旻
• Other Authors: Yuang-Shung Lee
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/12518257572700622304

碩士 === 輔仁大學 === 電機工程學系碩士班 === 101 === Lithium-ion batteries for its superior performance, have been widely used nowadays, such as Electric Vehicle （EV）, Hybrid Electric Vehicle （HEV）, Communication energy systems, portable products, etc. However, In order to fulfill the power consumption of requirements, battery cells would connect in parallel or series. This thesis presents a bidirectional buck-boost converter with energy transfer capacitor based battery equalization scheme with state of charge（SOC） estimation. The architecture ensured the batteries operated within safety limits, estimated the open circuit voltage（OCV） of each unit cell accurately, and achieved SOC balancing between battery cells during charge/discharge.