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Universal inductive battery charger system

  • US 5,959,433 A
  • Filed: 08/22/1997
  • Issued: 09/28/1999
  • Est. Priority Date: 08/22/1997
  • Status: Expired due to Term
First Claim
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1. In combination:

  • an inductive battery charger including a charging coil which creates magnetic flux lines when said charging coil is energized;

    said inductive battery charger also including a housing having a generally flat battery pack support surface, said charging coil being positioned in said housing adjacent said support surface;

    a rechargeable battery pack having a generally flat surface for positioning adjacent said battery charger in a non-direct electrical contact relationship with respect thereto;

    said battery pack including at least one discrete battery cell;

    said battery pack also including a pick-up coil adjacent said flat surface which will have an electrical current induced therein when said battery pack is positioned adjacent said battery charger and said battery charger is energized;

    said battery pack including circuit means for utilizing the induced current in said pick-up coil to charge the battery cell in said battery pack;

    said circuit means comprising a bridge rectifier electrically connected to said pick-up coil, said bridge rectifier being series connected to each battery cell in said battery pack, said battery pack also including a current limiting resistor imposed in the circuitry between said bridge rectifier and said battery cell in said battery pack.

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