Combined heating and pre-charging function and hardware for propulsion batteries

US8497031B2 · kind B2 · utility

Assignee

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

• Marc Reischmann · Wallertheim, DE
• Peter Andres · Ginsheim-Gustavsburg, DE

Key dates

• Filing date: Aug 10, 2010
• Grant date: Jul 30, 2013
• Expiry date: Aug 5, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/70
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A battery circuit for an electric vehicle that employs a resistor that provides both a pre-charging function at system start-up and battery heating. The battery circuit includes a positive high voltage bus line electrically coupled to a positive terminal of the battery and a negative high voltage bus line electrically coupled to the negative terminal of the battery. A first end of the resistor is electrically coupled to the positive high voltage bus line, a first switch is electrically coupled between a second end of the resistor and the positive high voltage bus line and a second switch is electrically coupled between the second end of the resistor and the negative high voltage bus line. The pre-charging operation is provided when the first switch is closed and the second switch is opened and the heating function is provided when the second switch is closed and the first switch is opened.