CHARGING SYSTEM, ELECTRICAL APPLIANCE HAVING POWER RECEPTION DEVICE OF CHARGING SYSTEM, AND CHARGE COMPLETION DISCRIMINATION METHOD FOR CHARGING SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a charging system in which the completion of battery charge in a power reception device can be detected on a power supply device side by a simple and inexpensive structure capable of preventing noise generation.

SOLUTION: A charging system (1) includes: a charger (2) (power supply device) having a power supply coil (21); and a charging unit (10) (power reception device) having a power reception coil (13) in which electric current flows by the magnetic field generated in the power supply coil (21). The charging unit (10) includes: a charging control part (16) (charging part); and an electric current magnification part (17) for magnifying the electric current flowing in the power reception coil (13) more than the case of the completion of change to a battery (12) when the charging of the battery (12) is completed. The charger (2) includes a CPU (26) (charge completion discrimination part) for discriminating the completion of charging the battery (12) by detecting the increase of the electric current flowing in the power reception coil (13) by the electric current magnification part (17) by means of the electric current flowing in the power supply coil (21).

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