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International Journal of Photoenergy
Volume 2013, Article ID 687693, 8 pages
http://dx.doi.org/10.1155/2013/687693
Research Article

Photovoltaic High-Frequency Pulse Charger for Lead-Acid Battery under Maximum Power Point Tracking

1Department of Electrical Engineering, National Chiayi University, Chiayi 60004, Taiwan
2Department of Electrical Engineering, Chung Yuan Christian University, Chungli 320, Taiwan

Received 30 November 2012; Accepted 30 May 2013

Academic Editor: Keith Emery

Copyright © 2013 Hung-I. Hsieh et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A photovoltaic pulse charger (PV-PC) using high-frequency pulse train for charging lead-acid battery (LAB) is proposed not only to explore the charging behavior with maximum power point tracking (MPPT) but also to delay sulfating crystallization on the electrode pores of the LAB to prolong the battery life, which is achieved due to a brief pulse break between adjacent pulses that refreshes the discharging of LAB. Maximum energy transfer between the PV module and a boost current converter (BCC) is modeled to maximize the charging energy for LAB under different solar insolation. A duty control, guided by a power-increment-aided incremental-conductance MPPT (PI-INC MPPT), is implemented to the BCC that operates at maximum power point (MPP) against the random insolation. A 250 W PV-PC system for charging a four-in-series LAB (48 ) is examined. The charging behavior of the PV-PC system in comparison with that of CC-CV charger is studied. Four scenarios of charging statuses of PV-BC system under different solar insolation changes are investigated and compared with that using INC MPPT.