Li-ion Battery Charger Applying Phase-Shift Full Bridge Converter

• Main Authors: Ci-Syuan Huang, 黃啟軒
• Other Authors: Yao-Ching Hsieh
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/99657789659273502179

碩士 === 國立東華大學 === 電機工程學系 === 96 === In recent years, due to the gradually exhausted fossil fuel and the serious side-effect of greenhouse effect, energy-saving and carbon-reduction becomes a popular slogan for both government and citizens. In Taiwan, because of the well-development of highway construction and high road-vehicle density, on-road vehicles should be one of the blames for energy consumption and air pollution. To solve this problem, hybrid electric vehicle (HEV) is proposed to promote the energy efficiency and reduce the exhaust emission. As HEV is commercialized, plug-in hybrid electric vehicle (PHEV) becomes the novel research orientation. PHEV is expected to further reduce the oil consumption. Rechargeable (or secondary) battery is one of the crucial components of electric vehicles. Among varieties of rechargeable batteries, lithium-ion (Li-ion) batteries have the highest energy density. In order to trim the weight of electric vehicles, Li-ion batteries are the prominent power source candidates for the next-generation HEV. This thesis is to design and implement an on-board Li-ion battery charger for PHEV. Phase-shift full-bridge converter is adopted as the power stage of the charger to provide higher output power and higher conversion efficiency. Circuit is controlled by the TMS320F2812 digital signal processor chip that is manufactured by TI. Controller is responsible for steering the circuit to fulfill constant-current constant-voltage (CC-CV) charging profile, accompanied by the overcharging protection mechanism of Li-ion batteries.