Title page for etd-0627116-174422


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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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