Monitoring device for electric storage battery and configuration therefor

  • US 5,159,272 A
  • Filed: 07/21/1989
  • Issued: 10/27/1992
  • Est. Priority Date: 07/27/1988
  • Status: Expired due to Fees
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First Claim
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1. In an electric storage battery having a housing comprising a plurality of walls for enclosing the electrochemical components of said battery and further having at least one pair of positive and negative battery terminals suitable for connecting said battery in an engine system, an apparatus for electrically communicating with the electrochemical components of said battery and testing the health thereof, said apparatus comprising:

  • a monitoring device received by a receptacle formed in one of said walls of said battery;

    first means electrically associated with at least one pair of battery terminals for placing said monitoring device in electrical communication with the electrochemical components of said battery;

    said monitoring device including a low charge detector for detecting a first voltage condition across said terminals and in response thereto indicating said battery is being operated in a state of low charge but remains capable of starting said engine;

    said monitoring device also including a replacement detector for detecting a second voltage condition across said terminals of said battery and in response thereto indicating said battery is being operated in a state that is impending on a state of low charge which is insufficient to start said engine;

    signalling means responsive to said first and second circuits for signalling the detection of said first or second voltage conditions; and

    said monitoring device further including a start detector for detecting a third voltage condition following a previous detection of said second voltage condition and causing said signalling means to remove any indication of the previous detection.

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