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:
Jun. 26, 2012
Filed:
Apr. 21, 2008
William Stephen Hart, Plano, TX (US);
Brian L. Graham, Carrollton, TX (US);
John Arthur Fee, Garland, TX (US);
Laszlo Szerenyi, St. Petersburg, FL (US);
William Stephen Hart, Plano, TX (US);
Brian L. Graham, Carrollton, TX (US);
John Arthur Fee, Garland, TX (US);
Laszlo Szerenyi, St. Petersburg, FL (US);
Advanced Battery Management, LLC, Irving, TX (US);
Abstract
A battery charger with a fixed frequency charging signal at or near the resonant frequency of the battery to be charged is presented. The present invention utilizes a microprocessor to modulate a current source at or near the resonant frequency of the battery to be charged without the use of a PLL. To simplify conventional modulated battery chargers, the PLL or other methods of phase correction are removed, reducing most of the calculation requirements for adjusting the phase angle, thereby reducing the piece count and ultimately cost and complexity. The result is a solution wherein charging occurs at or near the resonant frequency of the battery, and although suboptimal, the results are superior to traditional charging methods.