Title page for etd-0708107-185935


[Back to Results | New Search]

URN etd-0708107-185935
Author Yi-Ping Chen
Author's Email Address m943010108@student.nsysu.edu.tw
Statistics This thesis had been viewed 5577 times. Download 9670 times.
Department Electrical Engineering
Year 2006
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title State-of-Charge Estimations for Lead-Acid and Lithium-Ion Batteries
Date of Defense 2007-06-15
Page Count 57
Keyword
  • lithium-ion battery
  • Coulomb/Ampere-Hour Counting method
  • dynamic open-circuit-voltage method
  • State-of-Charge (SOC)
  • lead-acid battery
  • Abstract This thesis studies State-of-Charge (SOC) method for widely used lead-acid batteries and the most prospective lithium-ion batteries. First, the relationship between the battery capacity and the open-circuit-voltage under different charging/discharging currents is investigated based on the equivalent circuit. Experimental results indicate that the open-circuit-voltage of the lead-acid battery varies regularly with the charging/discharging current and the duration of time for the battery disconnected from the load. Accordingly, a dynamic open-circuit-voltage method in considerations the open-circuit-time and the previous operating current is capable of precisely estimating the battery capacity in a shorter time. As for the lithium-ion batteries, their charging/discharging characteristics reveal that the Coulomb/Ampere-Hour Counting method is capable of yielding accurate estimations. Finally, through the experiments that emulate practical operations, the SOC estimations of batteries are verified to demonstrate the effectiveness and accuracy of the proposed methods.
    Advisory Committee
  • Chih-Chiang Hua - chair
  • Jia-You Lee - co-chair
  • Yao-Ching Hsieh - co-chair
  • Huang-Jen Chiu - co-chair
  • Chin-Sien Moo - advisor
  • Files
  • etd-0708107-185935.pdf
  • indicate in-campus access immediately and off_campus access in a year
    Date of Submission 2007-07-08

    [Back to Results | New Search]


    Browse | Search All Available ETDs

    If you have more questions or technical problems, please contact eThesys