Resonance-type non-contact power supply system
First Claim
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.
1 Assignment
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Accused Products
Abstract
Movable body equipment is provided with: a secondary-side resonance coil, which receives power from a primary-side resonance coil of power supply equipment; a rectifier, which rectifies the power received by the secondary-side resonance coil; and a secondary battery, to which to which the power rectified by the rectifier is supplied. A resonance-type non-contact power supply system is provided with: state of charge detection units, which detect the state of charge of the secondary battery; and an impedance estimation unit, which estimates an impedance estimation value for the secondary battery on the basis of the state of charge of the secondary battery. When the absolute value of the difference between the impedance estimation value and the current impedance value of the secondary battery exceeds a threshold, a determination unit determines that a foreign body is present between the primary-side resonance coil and the secondary-side resonance coil.
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Citations
5 Claims
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1. A resonance type non-contact power supply system comprising:
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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. - View Dependent Claims (2, 3, 4, 5)
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Specification