Experimental research on charging characteristics of a solar photovoltaic system by the pressure-control method

Autor: Hua Zhu, Zhang-lu Xu, Zi-juan Cao
Rok vydání: 2011
Předmět:
Zdroj: Journal of Zhejiang University-SCIENCE A. 12:470-474
ISSN: 1862-1775
1673-565X
DOI: 10.1631/jzus.a1000335
Popis: The charging characteristics of the valve-regulated lead acid (VRLA) battery driven by solar energy were experimentally studied through the pressure-control method in this paper. The aims of the research were to increase charging efficiency to make the most of solar energy and to improve charging quality to prolong life of battery. The charging process of a 12 V 12 A·h VRLA battery has been tested under the mode of a stand-alone photovoltaic (PV) system. Results show that the pressure-control method can effectively control PV charging of the VRLA battery and make the best of PV cells through the maximum power point tracking (MPPT). The damage of VRLA battery by excess oxygen accumulation can be avoided through the inner pressure control of VRLA battery. Parameters such as solar radiation intensity, charging power, inner pressure of the battery, and charging current and voltage during the charging process were measured and analyzed.
Databáze: OpenAIRE
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