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:
Apr. 20, 2010
Filed:
Dec. 21, 2006
Shiqiang Liu, Chengdu, CN;
Guoxing LI, Sunnyvale, CA (US);
Sean Xiao, Shanghai, CN;
Liusheng Liu, San Jose, CA (US);
Shiqiang Liu, Chengdu, CN;
Guoxing Li, Sunnyvale, CA (US);
Sean Xiao, Shanghai, CN;
Liusheng Liu, San Jose, CA (US);
O2Micro International Limited, Grand Cayman, KY;
Abstract
A battery pre-charging circuit includes a pre-charging path, a pre-charging switch and a low-voltage pre-charging circuit. The pre-charging path is coupled between a charger and a battery for providing a pre-charging current from the charger to the battery. The pre-charging switch is coupled to the pre-charging path for conducting along the pre-charging path. The low-voltage pre-charging circuit is coupled to the pre-charging switch for controlling the pre-charging switch. The low-voltage pre-charging circuit is configured to switch on the pre-charging switch when the battery voltage is below a first battery voltage level.