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Power tool battery pack wireless charger

  • US 9,948,128 B2
  • Filed: 08/04/2015
  • Issued: 04/17/2018
  • Est. Priority Date: 06/18/2012
  • Status: Active Grant
First Claim
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1. A power tool system comprising:

  • a power tool having a housing and electrical terminals disposed within the power tool;

    a first power tool battery pack separable from and attachable to the power tool housing, the first power tool battery pack being electrically connectable to the power tool electrical terminals when attached to the power tool, the first power tool battery pack comprising at least one battery cell, a receiver coil, and a control circuit for controlling the amount of power that is provided to the at least one battery cell; and

    a battery pack charger separable from and wirelessly connectable to the first power tool battery pack, the battery pack charger comprising at least one transmitter coil for generating a magnetic field which induces a voltage in the receiver coil, a control circuit for controlling the amount of power that is provided to the transmitter coil;

    wherein the first battery pack has a communication circuit providing control information to the battery pack charger control circuit.

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