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:
Nov. 01, 2011
Filed:
Jul. 01, 2008
Vernon L. Newhouse, Farmington, MI (US);
Jason A. Nassar, Hazel Park, MI (US);
Jeffrey T. Wolak, Brighton, MI (US);
Vernon L. Newhouse, Farmington, MI (US);
Jason A. Nassar, Hazel Park, MI (US);
Jeffrey T. Wolak, Brighton, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
Systems and methods are provided for precharging high-voltage buses. The precharge system comprises an energy source having a first terminal and a second terminal, wherein a first voltage is equal to a potential difference between the first terminal and the second terminal. The precharge system further comprises a bus having a first rail and a second rail, wherein a second voltage is equal to a potential difference between the first rail and the second rail. A first contactor is coupled between the first terminal and the first rail and a second contactor is coupled between the second terminal and the second rail. A controller is coupled to the energy source, the bus, and the contactors. The controller is configured to activate the second contactor, and thereafter activate the first contactor if the magnitude of a difference between the first voltage and the second voltage is less than a threshold tolerance.