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Title: Power electronic interface circuits for batteries and ultracapacitors in electric vehicles and battery storage systems

A method and apparatus for load leveling of a battery in an electrical power system includes a power regulator coupled to transfer power between a load and a DC link, a battery coupled to the DC link through a first DC-to-DC converter and an auxiliary passive energy storage device coupled to the DC link through a second DC-to-DC converter. The battery is coupled to the passive energy storage device through a unidirectional conducting device whereby the battery can supply power to the DC link through each of the first and second converters when battery voltage exceeds voltage on the passive storage device. When the load comprises a motor capable of operating in a regenerative mode, the converters are adapted for transferring power to the battery and passive storage device. In this form, resistance can be coupled in circuit with the second DC-to-DC converter to dissipate excess regenerative power. 8 figs.
Authors:
;
Publication Date:
OSTI Identifier:
570438
Report Number(s):
US 5,710,699/A/
PAN: US patent application 8-654,479
DOE Contract Number:
AC07-76ID01570
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 20 Jan 1998
Research Org:
EG & G Idaho Inc
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; HYBRID ELECTRIC-POWERED VEHICLES; SWITCHING CIRCUITS; ELECTRIC BATTERIES; DC TO DC CONVERTERS; CAPACITORS; CONDUCTOR DEVICES; POWER CONDITIONING CIRCUITS; POWER SYSTEMS