Patent ID: 8994326
Filing Date: 2015-03-31
Classification: B60L,H01M,H02J,Y02E,Y02P,Y02T

Abstract:
1. A resonance type non-contact power supply system comprising: power supply equipment including an AC power source and a primary-side resonance coil, which receives power supply from the AC power source; movable body equipment including a secondary-side resonance coil, which receives electric power from the primary-side resonance coil, a rectifier, which rectifies electric power received by the secondary-side resonance coil, and a secondary battery, to which electric power rectified by the rectifier is supplied; a state of charge detecting section for detecting a state of charge of the secondary battery; an impedance estimating section for obtaining an impedance estimate by estimating an impedance of the secondary battery based on the state of charge of the secondary battery; and a determining section, which determines that there is a foreign object between the primary-side resonance coil and the secondary-side resonance coil when the absolute value of the difference between the impedance estimate and a current impedance, which is the current value of the impedance of the secondary battery, exceeds a threshold value.