Vehicle battery system providing battery back-up and opportunity charging

  • US 5,488,283 A
  • Filed: 09/28/1993
  • Issued: 01/30/1996
  • Est. Priority Date: 09/28/1993
  • Status: Expired due to Fees
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First Claim
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1. In a power supply system for a motor vehicle including a first storage battery for supplying electrical power to a primary load of the vehicle, said primary load including at least the starter motor and the ignition circuit Of the vehicle, the improvement comprising:

  • a second storage battery for supplying electrical power to an electrically heated catalytic converter system of the vehicle;

    first switching means for connecting said electrically heated catalytic converter system to said second storage battery;

    second switching means for connecting said second storage battery in parallel with said first storage battery;

    and control means including means responsive to operation of an ignition switch of the vehicle to cause said first switching means to operate and connect said catalytic converter system to said second storage battery, and said control means including inhibit means for preventing said second switching means from connecting said second storage battery in parallel with said first storage battery when said catalytic converter system is connected to said second storage battery by said first switching means.

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