[[alternative]]Study of Charge Equalization for Series Batteries

碩士電機工程學系[[abstract]]由於電池之間充放電特性及老化程度的不相同，因此當多顆電池以串聯的方式充電時，將會造成電池之間電量的不平衡，因而降低電池的充放電效率，甚至損害電池壽命，因此為了提高充放電效率及延長電池使用壽命，串聯電池組之充電器需具備有均勻充電的功能。本文將探討各種均充架構之優缺點及適用性，提出以順向式轉換器為基礎的平衡充電電路架構，能使電壓較高之電池，將能量釋出，分配給電壓較低之電池。並經由分析、模擬及實驗結果驗證此種均充架構之可行性[[abstract]]Due to the different charging/discharging characteristics and ageing degree of the batteries, the restored capacity in each battery may not be the same in string batteries charging. Therefore, it will reduce the charging /discharging efficiency and damage the battery cycle life. In order to increase the charging/discharging efficiency and extend the battery cycle life, the charger for the battery string must have the capability of charging equalization. This thesis studies the each method of charging equalization and presents the charging equalization circuit based on forward converter; thus it can transfer the energy of high voltage battery to the lower ones. From the analysis, simulation and experimental results, we will verify the feasibility of the presented charging equalization circuit