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:
Jan. 27, 1998
Filed:
Mar. 12, 1996
Michael T Reher, Grafton, WI (US);
Ronald L Piontkowski, Brookfield, WI (US);
John J Weier, Milwaukee, WI (US);
Bradley N Koeppel, Watertown, WI (US);
Globe-Union, Inc., Milwaukee, WI (US);
Abstract
A vehicle control unit estimates a temperature of the vehicle's battery including the temperature of each of the battery's plurality of cells. The control unit includes a memory unit having stored therein heat transfer coefficients of three types. The first type is representative of heat transfer between the cells of the battery; the second type is representative of heat transfer between the surrounding air and the middle cells of the battery; and the third type is representative of heat transfer between the surrounding air and the end cells of the battery. A microprocessor retrieves the heat transfer coefficients from the memory unit and determines individual cell temperatures of the battery based on the heat transfer coefficients, temperature of the ambient air, and the drive state of the vehicle.