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BI-DIRECTIONAL BATTERY VOLTAGE CONVERTER

  • US 20110025126A1
  • Filed: 07/29/2010
  • Published: 02/03/2011
  • Est. Priority Date: 07/31/2009
  • Status: Active Grant
First Claim
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1. A method of charging batteries in a vehicle electrical system, the vehicle electrical system comprising a system bus, a first switch selectively connecting a first battery with the system bus, a second switch selectively connecting a second battery with the system bus, and a controller monitoring a voltage of the vehicle electrical system and controllably opening and closing the first switch and the second switch, the method comprising:

  • opening the first switch and the second switch, thereby disconnecting the first battery and the second battery from the system bus;

    closing the first switch, thereby connecting the first battery with the system bus;

    monitoring the voltage of the vehicle electrical system in response to the first switch closing;

    opening the first switch if the voltage of the vehicle electrical system traverses a threshold value;

    closing the second switch, thereby connecting the second battery with the system bus;

    monitoring the voltage of the vehicle electrical system in response to the second switch closing; and

    opening the second switch if the voltage of the vehicle electrical system traverses the threshold value.

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