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Power tool battery pack wireless charger

  • US 10,199,856 B2
  • Filed: 07/21/2017
  • Issued: 02/05/2019
  • Est. Priority Date: 06/18/2012
  • Status: Active Grant
First Claim
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1. A power tool battery pack comprising:

  • a housing having first and second walls;

    at least one rechargeable battery cell disposed within the housing;

    a first receiver coil disposed within the housing for receiving a magnetic field generated by a wireless charger, a voltage induced in the first receiver coil being used to charge the at least one rechargeable battery cell;

    a control circuit connected to the first receiver coil for controlling the amount of electric power that is provided to the at least one rechargeable battery cell; and

    a communication circuit connected to the control circuit for providing control information to the wireless charger, wherein the communication circuit modulates a reflected load signal.

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