Lead-acid batteries for partial-state-of-charge applications

✍ Scribed by B. Hariprakash; S.A. Gaffoor; A.K. Shukla

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 968 KB
• Volume: 191
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/j.jpowsour.2008.12.081

✦ Synopsis

2 V/40 Ah valve-regulated lead-acid (VRLA) cells have been constructed with negative plates employing carbon black as well as an admixture of carbon black + fumed silica as additives in negative active material for partial-state-of-charge (PSoC) applications. Electrical performance of such cells is compared with conventional 2 V/40 Ah VRLA cells for PSoC operation. Active material utilization has been found to be higher for carbon-black + fumed-silica mixed negative plates while formation is faster for cells with carbon-black mixed negative plates. Both faradaic efficiency and percentage capacity delivered have been found to be higher for cells with carbon-black + fumed-silica mixed negative plates. However, a high self-discharge rate is observed for cells with carbon-black + fumed-silica mixed negative plates.