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author:

Hu, Junmei (Hu, Junmei.) [1] | Guo, Yonglang (Guo, Yonglang.) [2] (Scholars:郭永榔) | Zhou, Xuechou (Zhou, Xuechou.) [3]

Indexed by:

EI Scopus SCIE

Abstract:

Valve-regulated lead-acid (VRLA) batteries that have aged on a float charge at constant voltage occasionally suffer from thermal runaway. Operating conditions for a VRLA battery have been simulated by changing the electrolyte saturation level in the separator and the ambient temperature. The charge current, battery temperature and cell overpressure were measured during current-limited constant-voltage charging. The experiments show that applied voltage, saturation level and ambient temperature are significant variables in the oxygen cycle. However, the saturation level of the electrolyte in the separator pore volume is critical. When it is lower than 80%, thermal runaway occurs readily. Significant corrosion of the positive grid and poor conductivity between the grid and the active mass (AM) is also found in aged VRLA batteries, and many inactive PbSO4 crystals appear on the negative plates. As a result, both positive and negative plates have a very high resistance, which can accelerate thermal runaway.

Keyword:

oxygen recombination saturation thermal runaway valve-regulated lead-acid batteries

Community:

  • [ 1 ] Fuzhou Univ, Coll Chem & Chem Engn, Fuzhou 350002, Peoples R China

Reprint 's Address:

  • 郭永榔

    [Guo, Yonglang]Fuzhou Univ, Coll Chem & Chem Engn, Fuzhou 350002, Peoples R China

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Source :

JOURNAL OF APPLIED ELECTROCHEMISTRY

ISSN: 0021-891X

Year: 2006

Issue: 10

Volume: 36

Page: 1083-1089

1 . 4 0 9

JCR@2006

2 . 4 0 0

JCR@2023

ESI Discipline: CHEMISTRY;

JCR Journal Grade:3

Cited Count:

WoS CC Cited Count: 12

SCOPUS Cited Count: 15

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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