Assembly and performance of hybrid-VRLA cells and batteries

Several commercial-grade hybrid-VRLA and AGM-VRLA cells and batteries have been assembled and tested under varying charge–discharge rates in a temperature range between 50 and −40 °C. Impedance studies on hybrid-VRLA and AGM-VRLA cells have been conducted to reflect on their resistive and capacitive...

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Bibliographic Details
Published in:Journal of power sources 2005-06, Vol.144 (2), p.560-567
Main Authors: Martha, S.K., Hariprakash, B., Gaffoor, S.A., Ambalavanan, S., Shukla, A.K.
Format: Article
Language:English
Subjects:
Absorbent-glass-mat (AGM)
Applied sciences
Colloidal silica
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Exact sciences and technology
Gelled electrolyte
Hybrid
Oxygen recombination
VRLA batteries
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Summary:Several commercial-grade hybrid-VRLA and AGM-VRLA cells and batteries have been assembled and tested under varying charge–discharge rates in a temperature range between 50 and −40 °C. Impedance studies on hybrid-VRLA and AGM-VRLA cells have been conducted to reflect on their resistive and capacitive values. A linear relationship is found to exist between logarithmic state-of-charge values and ohmic impedance of batteries. In general, hybrid-VRLA cells and batteries perform better than their AGM-VRLA counterpart. A field-performance study conducted on AGM-VRLA and hybrid-VRLA batteries for solar-lighting application also suggests the latter to be superior.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2004.11.016