Embedded system design of lithium battery gas gauges

• Main Authors: Hao-Jun Chen, 陳浩鈞
• Other Authors: Mu-Der Jeng
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/98983706279945243050

碩士 === 國立臺灣海洋大學 === 電機工程學系 === 96 === The article mainly presented the thesis on MCS-51 Embeded system design of LiFePO4 battery gas gauge. Include many hardware units like voltmeter, ammeter, and microcontroller. Learned by experiment on the characteristic of the battery, that prior storage the characteristic parameter into the microcontroller flash ROM, and assist the microcontroller to calculation the capacity of battery. In the research of the characteristic of the battery, through measure and create the characteristic parameter of the battery in advance, and utilize the curve fitting storing in the microcontroller by segment. This method can reduce the device space stored. Besides, the different discharge rate of lithium battery depend on diverse load. Previously estimate can figure out the surplus battery capacity. Once the gas gauge working, the parameters can calculate out remain time under load at present.