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Title: Method and apparatus for controlling battery charging in a hybrid electric vehicle

Patent ·
OSTI ID:958093

A starter/alternator system (24) for hybrid electric vehicle (10) having an internal combustion engine (12) and an energy storage device (34) has a controller (30) coupled to the starter/alternator (26). The controller (30) has a state of charge manager (40) that monitors the state of charge of the energy storage device. The controller has eight battery state-of-charge threshold values that determine the hybrid operating mode of the hybrid electric vehicle. The value of the battery state-of-charge relative to the threshold values is a factor in the determination of the hybrid mode, for example; regenerative braking, charging, battery bleed, boost. The starter/alternator may be operated as a generator or a motor, depending upon the mode.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC36-83CH10093
Assignee:
Ford Global Technologies, Inc. (Dearborn, MI)
Patent Number(s):
6,583,599
Application Number:
09/705,501; TRN: US201002%%316
OSTI ID:
958093
Country of Publication:
United States
Language:
English