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:
Jul. 28, 2009
Filed:
Aug. 17, 2007
Shih-fang Wong, Taipei Hsien, TW;
Tai-chun LI, Shenzhen, CN;
Shih-Fang Wong, Taipei Hsien, TW;
Tai-Chun Li, Shenzhen, CN;
Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Shenzhen, Guangdong Province, CN;
Hon Hai Precision Industry Co., Ltd., Tu-Cheng, Taipei Hsien, TW;
Abstract
A charging circuit for charging a rechargeable battery () includes a charge management unit (), a comparator () and a changeover switch (). The changeover switch () includes a default state of connecting the rechargeable battery to the comparator (), so that the comparator () produces a comparison result by comparing a battery voltage of the rechargeable battery () with a preset voltage threshold. The comparison result is transmitted to the charge management unit () and the charge management unit () controls the changeover switch () to switch from the default state to a controlled state if the battery voltage is less than the preset voltage threshold according to the comparison result. In the controlled state the changeover switch () connects the rechargeable battery () to the charge management unit (), so that the charge management unit () charges the rechargeable battery ().