Pre-charging load using main contactor coil

US10384627B2 · kind B2 · utility

Assignee

• Ford Global Technologies, LLC · US

Inventors

• Wesley Edward Burkman · Dearborn, US
• Robert Bolduc · Allen Park, US
• Benjamin A. Tabatowski-Bush · South Lyon, US
• Arnold Kweku Mensah-Brown · Canton, US

Key dates

• Filing date: Aug 9, 2016
• Grant date: Aug 20, 2019
• Expiry date: Aug 6, 2037

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S903/904
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A vehicle system includes a contactor including a coil and relay, a traction battery, a load, and a controller configured to transfer current from the traction battery through the coil to pre-charge the load without causing the relay to close such that a voltage drop across the relay falls below a threshold value, and subsequently cause the relay to close.