Multicell battery monitoring system

  • US 5,675,234 A
  • Filed: 07/10/1996
  • Issued: 10/07/1997
  • Est. Priority Date: 07/10/1996
  • Status: Expired due to Fees
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First Claim
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1. A continuously monitored battery-operated power supply comprisingat least four battery cells forming a parallel connected pair of banks, in which the cells in each bank are series-connected to each other, and wherein each bank contains at least two batteries, and each battery contains a plurality of said cells, with the midpoints being located at a respective connection between two batteries in each bank, and said midpoints being defined as to points where the internal resistance of cells on either side of the midpoints in each bank is normally equal;

  • a measuring device connected between the banks, said measuring device being responsive to changes in internal resistance of any of the cells in either bank wherein said measuring device being responsive to changes to internal resistance of any of the cells in either bank wherein said measuring device is connected between said midpoints of the banks, so that, when the internal resistance of one of the cells changes, a potential difference arises across the measuring device, the polarity of which depends on which bank contains the cell whose internal resistance has changed; and

    said power supply further comprising a switch for each bank, whereby the bank containing the cell whose internal resistance has changed can be disconnected from a load.

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