The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 31, 2015
Filed:
May. 12, 2011
Kazuyoshi Takada, Kariya, JP;
Sadanori Suzuki, Kariya, JP;
Shimpei Sakoda, Kariya, JP;
Yukihiro Yamamoto, Kiriya, JP;
Shinji Ichikawa, Toyota, JP;
Toru Nakamura, Toyota, JP;
Kazuyoshi Takada, Kariya, JP;
Sadanori Suzuki, Kariya, JP;
Shimpei Sakoda, Kariya, JP;
Yukihiro Yamamoto, Kiriya, JP;
Shinji Ichikawa, Toyota, JP;
Toru Nakamura, Toyota, JP;
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.