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:
Mar. 27, 2018
Filed:
Sep. 26, 2013
Ford Global Technologies, Llc, Dearborn, MI (US);
Hasdi R. Hashim, Ann Arbor, MI (US);
Bruce Carvell Blakemore, Plymouth, MI (US);
Arnold Kweku Mensah-Brown, Canton, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A vehicle is disclosed having a traction battery and an electrical impedance connected by a contactor. A pre-charge circuit is disclosed that controls current flow from the traction battery through the pre-charge circuit to the electrical impedance to increase voltage at the electrical impedance such that as the voltage approaches a voltage of the traction battery, a duty cycle of the pre-charge circuit approaches a maximum value and a current through the pre-charge circuit approaches a minimum value. In response to current falling below a predetermined value, the contactor is closed. A current sensor is disclosed that is located in the pre-charge circuit. A method of operating the pre-charge circuit is disclosed.