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Secondary coil module

  • US 9,667,089 B2
  • Filed: 01/21/2015
  • Issued: 05/30/2017
  • Est. Priority Date: 01/24/2014
  • Status: Active Grant
First Claim
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1. A secondary coil module, comprising:

  • a storage battery;

    a charging control circuit controlling charging of the storage battery;

    a tubular core made of magnetic material and covering an outer circumferential face of at least one of the storage battery and the charging control circuit; and

    a wire made of conductive material, the wire being connected to the charging control circuit and wound around the outer circumferential face of the core,wherein the secondary coil module is disposed relative to a primary coil such that power is generated in the wire by electromagnetic induction, transmitted to the charging control circuit, and converted to DC power for charging the storage battery, andwherein the tubular core is configured such that at a time of charging of the storage battery, at least one axial end of the tubular core is oriented towards the primary coil and is closed by a lid member made of magnetic material.

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