Simultaneous real-time measurements of potential and high-frequency resistance of a lab cell

F. Huet, R. P. Nogueira, L. Torcheux, P. Lailler

Research output: Contribution to journalConference articlepeer-review

11 Scopus citations

Abstract

Simultaneous measurements of the potential and high-frequency resistance, RHF, of a lead-acid battery cell of 1200Ah capacity used in photovoltaic applications have been carried out during the charge and discharge of the cell, owing to an original experimental set-up devised in the laboratory providing real-time analog signals. It was shown that RHF depended on the state-of-charge in a non-linear way, with a significant increase at low state-of-charge. In complementary measurements on cells of smaller capacities (45Ah), it was observed that the final value of RHF after a complete discharge was higher for a low discharge rate. The RHF variations were explained by the blocking effect of insulating PbSO4 crystals whose morphology and size depend on both state-of-charge and (dis)charge rate. It was also shown that the resistivity of the bulk electrolyte, measured above the plates, had no influence on the RHF value.

Original languageBritish English
Pages (from-to)414-421
Number of pages8
JournalJournal of Power Sources
Volume113
Issue number2
DOIs
StatePublished - 21 Jan 2003
EventProceedings of the International Conference on LABAT - Varna, Bulgaria
Duration: 10 Jun 200213 Jun 2002

Keywords

  • Electrochemical impedance
  • High-frequency resistance
  • Internal resistance
  • Lead-acid battery
  • State-of-charge
  • State-of-health

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