Studies on Self-balance of Lithium Battery and Charging Enhancement of Independent Solar Power System
Date Issued
2015
Date
2015
Author(s)
Huang, Shiu-Wei
Abstract
This research develops a self-balancing technique for lithium battery and study the use of hybrid battery storage to enhance charging performance of independent solar PV power system. The battery self-balancing is employed by switching the battery cell connection from series to parallel. The self-balancing is activated when an abnormal cell voltage is detected. A simple controller was developed in the present study for battery self-balancing. The experiments show that self-balancing technology can improve not only voltage uniformity between cells but also the life of Li-ion battery. Lithium battery connecting a super-capacitor (SC) to enhance charge performance of independent solar PV power system was also studied using overall impedance of the hybrid storage in frequency domain. It is found theoretically and experimentally that it needs a larger SC for lithium battery to obtain low overall impedance to enhance solar charging performance.
Subjects
Lithium Battery
Balance
Decay
Super-capacator
Type
thesis
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