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:
Feb. 24, 2015
Filed:
Sep. 29, 2011
Shigefumi Odaohhara, Yamato, JP;
Tin-lup Wong, Chapel Hill, NC (US);
Kenneth Scott Seethaler, Wake Forest, NC (US);
Shigefumi Odaohhara, Yamato, JP;
Tin-Lup Wong, Chapel Hill, NC (US);
Kenneth Scott Seethaler, Wake Forest, NC (US);
Lenovo (Singapore) Pte Ltd., Singapore, SG;
Abstract
A charge system is disclosed. A charge system includes a switching device and a controller. The switching device performs switching of a DC input voltage at a predetermined switching frequency to generate an output voltage, and the output voltage being utilized for charging said battery. The controller allows the switching device to operate at a first switching frequency immediately after starting of charge and at a second switching frequency when a frequency changing condition holds. The second switching frequency is higher than that of first switching frequency.