Battery-flywheel hybrid electric power system for near-term application. Volume I. System description

Technical Report · Thu Apr 15 04:00:00 EST 1976

OSTI ID:7269565

Davis, D; D,; O'Connell, L G; Warner, S E; Raynard, A E; Rowlett, B H

A description is given of a hybrid propulsion system design, based upon demonstrated technology, that will substantially improve performance, range, and consumer acceptability of a battery-powered electric vehicle. A newly demonstrated high-energy composite flywheel is coupled to an extremely simple, efficient, electro-mechanical transmission. Lead-acid batteries provide the prime power source. Interactive control of battery and flywheel drive power is provided by a versatile microprocessor-based power control unit. Efficient recovery of vehicle kinetic energy during braking, plus the energy base required to meet all high power transient demands, is provided by the flywheel. Battery demand is stabilized at a low average value resulting in improved battery performance through increases in both cycle life and available energy. Electric vehicle acceleration and range improvements due to the hybrid system described are predicted to be in excess of 80 percent for a vehicle operated in a stop-and-go commuter environment. This increase in performance is accompanied by a decrease in operating cost.

• Research Organization: California Univ., Livermore (USA). Lawrence Livermore Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7269565
• Report Number(s): UCID-17098(Vol.1)
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250500 -- Energy Storage-- Flywheels
250904 -- Energy Storage-- Batteries-- Other Applications
33 ADVANCED PROPULSION SYSTEMS
330300 -- Advanced Propulsion Systems-- Electric-Powered Systems
330400* -- Advanced Propulsion Systems-- Hybrid Systems
ACCELERATION
AUTOMOBILES
CONTROL SYSTEMS
DESIGN
ELECTRIC BATTERIES
ELECTRIC MOTORS
ELECTRIC-POWERED VEHICLES
ELECTROCHEMICAL CELLS
ENERGY STORAGE SYSTEMS
FLYWHEELS
HYBRID SYSTEMS
LEAD-ACID BATTERIES
MACHINE PARTS
MECHANICAL TRANSMISSIONS
MOTORS
PERFORMANCE
REGENERATIVE BRAKING
VEHICLES