High Temperature Capacitors for Hybrid Electric Vehicles

Award Information
Agency: Department of Defense
Branch: Army
Contract: W56HZV-09-C-0148
Agency Tracking Number: A082-154-2064
Amount: $119,867.00
Phase: Phase I
Program: SBIR
Awards Year: 2009
Solicitation Year: 2008
Solicitation Topic Code: A08-154
Solicitation Number: 2008.2
Small Business Information
Hammonds South, Unit Q, 611 North Hammonds Ferry Road, Linthicum Heights, MD, 21090
DUNS: 959989054
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Keith Bridger
 Chief Technology Officer
 (410) 636-9350
 keith@activesignaltech.com
Business Contact
 Arthur Cooke
Title: President
Phone: (410) 636-9350
Email: arthur@activesignaltech.com
Research Institution
N/A
Abstract
Active Signal Technologies, in collaboration with Novacap, Alfred University and Lockheed Martin, proposes in Phase I to build a compact-design 700-V, 50 μF high temperature capacitor module. The module is populated with 1 μF capacitors based on a newly developed sodium bismuth titanate (NBT) dielectric with outstanding electrical performance to 200°C and beyond. Its novel design allows for 115°C coolant flow between the module stack layers, and the geometrical layout of components within the array layers provides for very low ESR and ESL. NBT was selected because of its very low combined temperature and voltage coefficient which gives rise to a net capacitance change < 20% across the band from -40°C to +200°C at full voltage stress. The capacitor is particularly well suited to handling high ripple current because of its low loss (< 2%) and low frequency dispersion to 60 kHz. The proposal addresses key issues of reliability, failure modes, size and cost. New formulations are investigated to increase dielectric constant and reduce component size. In the Phase I Option and Phase II, nano processing techniques will be introduced to reduce intrinsic flaw size, raise breakdown strength and lower sintering temperature to enable the use of base metal electrodes.

* Information listed above is at the time of submission. *

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