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URN	etd-0627116-174422
Author	Jhih-Kai Wang
Author's Email Address	power01012007@yahoo.com
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Department	Electrical Engineering
Year	2015
Semester	2
Degree	Master
Type of Document
Language	zh-TW.Big5 Chinese
Title	Battery Power System with Online SOC and SOH Calibration
Date of Defense	2016-07-20
Page Count	59
Keyword	Coulomb counting Battery State-of-charge (SOC) State-of-health (SOH) Battery power module (BPM)
Abstract	A laboratory battery power source is set up by four buck-boost type battery power modules (BPMs) with lithium iron phosphate (LiFePO4) batteries. Real-time estimations of batteries' state-of-charges (SOCs) and state-of-healths (SOHs) by the coulomb counting method are possible since the batteries in BPMs can be individually controlled during either charging or discharging cycle. A standard calibration process is proposed to assess a battery’s SOH by deliberately charging or discharging the battery from empty to full or from full to empty with a scheduled profile. On the other hand, partial calibration can be made in the case that the estimation starts from a status neither full nor empty but ends at the point of empty or full. By identifying the maximum charge status with standard or partial calibration, the SOH of battery in BPMs can be updated accordingly, and then the SOCs can be estimated more precisely. Experimental tests are carried out to demonstrate that the battery power system can provide an accurate online indication of batteries’ SOCs achieve charge equalization and at the same time achieve charge equalization .
Advisory Committee	Chih-Chiang Hua - chair Yong-Nong Chang - co-chair Hong-Tzer Yang - co-chair Hau-Chen Yen - co-chair Chin-Sien Moo - advisor
Files	etd-0627116-174422.pdf Indicate in-campus at 5 year and off-campus access at 5 year.
Date of Submission	2016-07-27

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