Patent ID: 9124121
Filing Date: 2015-09-01
Classification: H02J,H04B

Abstract:
1. A method for charging an electrochemical cell of a mobile communication device, said mobile communication device comprising a near field communication antenna configured to couple inductively with a primary inductor connected to a power supply via a driving unit, a near field communication circuit, a power receiving circuit comprising a rectification unit wired to said electrochemical cell, and a switching unit operable to selectively connect said communication circuit or said power receiving circuit to said near field communication antenna, the method comprising the steps: a. said switching unit connecting said power receiving circuit to said near field communication antenna; b. bringing said near field communication antenna into an operating inductive power outlet's vicinity; and c. said rectification unit rectifying a secondary voltage induced in said near field communication antenna; thereby providing a charging voltage for said electrochemical cell, wherein said mobile communication device is configured to determine said secondary voltage, and said switching unit is further operable to connect said near field communication antenna to said near field communication circuit when said secondary voltage has been determined to have a frequency of 13.56 megahertz.