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Title: Electromechanical Battery Program at the Lawrence Livermore National Laboratory

New materials and new design concepts are being incorporated in a new approach to an old idea -- flywheel energy storage -- to create an important alternative to the electrochemical storage battery for use in electric vehicles or for stationary applications, such as computer back-up power or utility load-leveling. We visualize such EMBs (electromechanical batteries) as being modular in character, with small (1--5 kWh) modules being used for power-conditioning and for vehicular use, and paralleled 25 kWh modules being used for bulk storage, i.e., load-leveling, applications. In a funded program at the Laboratory two fractional kWh, 200 kW (design peak power) modules have been constructed and subjected to shake-down testing. Their design for high peak power was prompted by awareness of a particular commercial need, as a component in a power-line conditioning device. In addition to such stationary applications, the high power capability of our EMB designs makes them attractive for use in hybrid-electric vehicles. Important elements of the LLNL program include the development of passive magnetic bearings and the application of new high-efficiency permanent magnet arrays to an ironless generator/motor. Use of these particular elements, together with a multi-ring design for the flywheel rotor, is particularly conducive to amore » systemic approach to the design of an EMB module. These particular design developments have been motivated by the economic issues of simplification, lowered cost, and extended maintenance-free service life.« less
Authors:
; ;
Publication Date:
OSTI Identifier:
10196594
Report Number(s):
UCRL-JC--117506; CONF-940812--24
ON: DE95003657;
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 29. intersociety energy conversion engineering conference,Monterey, CA (United States),7-12 Aug 1994; Other Information: PBD: 31 May 1994
Research Org:
Lawrence Livermore National Lab., CA (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; 25 ENERGY STORAGE; FLYWHEEL-POWERED VEHICLES; DESIGN; FLYWHEEL ENERGY STORAGE; FLYWHEELS; ROTORS; VACUUM SYSTEMS; ELECTRIC GENERATORS; MAGNETIC BEARINGS; MATERIALS 330500; 250500; FLYWHEEL PROPULSION; FLYWHEELS