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:
Jun. 07, 2005
Filed:
Jan. 08, 2004
Zhijian James Wu, Rochester Hills, MI (US);
Jyh-laing L. Lin, Novi, MI (US);
Dean Marshall, Clarkston, MI (US);
Brad Schoeff, Sterling Hts., MI (US);
Michel Trumbo, Troy, MI (US);
John G Hatfield, Leonard, MI (US);
James Karlet, Toledo, OH (US);
Yijun Tu, Tecumseh, CA;
Zhijian James Wu, Rochester Hills, MI (US);
Jyh-Laing L. Lin, Novi, MI (US);
Dean Marshall, Clarkston, MI (US);
Brad Schoeff, Sterling Hts., MI (US);
Michel Trumbo, Troy, MI (US);
John G Hatfield, Leonard, MI (US);
James Karlet, Toledo, OH (US);
Yijun Tu, Tecumseh, CA;
DaimlerChrysler Corporation, Auburn Hills, MI (US);
Abstract
A method of estimating an internal temperature of a vehicle battery is based on heat transfer between a heat source and the battery. In addition to the heat source, airflow generated by vehicle movement and radiator fans affects the internal temperature of the battery. The method estimates an initial internal temperature of the battery at engine startup based on how long the engine was off. The temperature of the heat source is determined. A transfer function is determined to represent the effect of the airflow. The method updates a current internal temperature of the battery based on the initial internal temperature and an integration of the transfer function and the heat source temperature.