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Dual battery control system

  • US 5,610,496 A
  • Filed: 06/30/1995
  • Issued: 03/11/1997
  • Est. Priority Date: 06/30/1995
  • Status: Expired due to Term
First Claim
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1. A portable electronic device and holster means for holding said portable electronic device comprising a dual battery control system comprising:

  • a first battery having a first low voltage signal and a first high voltage signal,a second battery having a second low voltage signal and a second high voltage signal,a first switch means for connecting and disconnecting said first battery from an electronic load of said portable electronic device in response to a first control signal for changing the state of said first switch means, wherein said first switch means is in a closed state when said portable electronic device is not in said holster,a second switch means for connecting and disconnecting said second battery from said electronic load in response to a second control signal for changing the state of said second switch means,sense means for producing said first and second control signals in response to the terminal voltage of said second battery, andfirst and second interface means for providing electrical connection between said portable electronic device and said holster means,wherein said portable electronic device contains said first switch means, said first battery, and said first interface means, andwherein said holster means contains said second switch means, said second battery, said sense means and said second interface means, andwherein said first and second interface means each comprise at least three electrical contacts, said at least three electrical contacts of said first interface means operatively connecting with said at least three electrical contacts of said second interface means when said portable electronic device is placed into said holster means, andwherein said first and second interface means enable connection of said first low voltage signal of said first battery to said second low voltage signal of said second battery, andwherein said first and second interface means further enable connection of said second high voltage signal of said second battery, said second high voltage signal emanating from said second switch means when said second switch means is closed, to said electronic load, andwherein said first and second interface means further enable connection of said first control signal emanating from said sense means to said first switch means.

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