Two-Stages Charger Design for LiFePO4 Battery Via Temperature-Limited and Constant-Voltage Algorithm

• Main Authors: Chun-Wei Ma, 馬君瑋
• Other Authors: Min-Chuan Lin
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/50262803754219707544

碩士 === 崑山科技大學 === 電子工程研究所 === 103 === This article taken to limit temperature - constant voltage (TL-CV) two-stage charging method . First allowable maximum current of the rechargeable battery , while detecting the temperature , when the temperature rises to a safe upper limit, charge current drops immediately half as constant current charging . Ten minutes later if the temperature continues to rise , not fall , the charge current is further decreased by half . Conversely, if the temperature began to drop after ten minutes , the charge current rise half as constant current charging . In this algorithm continued fragmented (piecewise) constant current charging until the battery terminal voltage rises to tradition given charge of the set-point voltage , the charging process automatically switches to constant voltage charging process . Throughout the fragmented constant current charging process, the battery temperature can be maintained at a safe upper limit for.