DEVELOPMENT OF AN ACCELERATED LIFE TEST FOR NICKEL HYDROGEN AND NICKEL-METAL HYDRIDE BATTERIES

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: N/A
Agency Tracking Number: 15054
Amount: $60,077.00
Phase: Phase I
Program: SBIR
Awards Year: 1991
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
9063 Bee Caves Road, Austin, TX, 78733
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Drs Av Bray/rl Smith
 Principal Investigator
 (512) 263-2102
Business Contact
Phone: () -
Research Institution
N/A
Abstract
THE PROPOSED ACCELERATED LIFE TESTING OF NICKEL HYDROGEN (NI-H) AND NICKEL METAL HYDRIDE (NI-HYDRIDE) BATTERIES USES IMPEDANCE SPECTROSCOPIC METHODS AS A DIAGNOSTIC FOR DETECTION OF AGING AND LIFE LIMITING PROCESSES. IN ADDITION, A THEORETICAL MODEL FOR THERMAL AND DEPTH OF DISCHARGE (DOD) STRESSES AS A MEANS OF ACCELERATING AGING IN THESE BATTERIES IS PROPOSED. THE IMPEDANCE SPECTROSCOPIC APPROACH USES A SERIES OF SPECTRAL FEATURES AS THE PRIMARY BATTERY LIFE DEGRADATION INDICATORS, AND TRI/AUSTIN WILL MEASURE THESE IN PHASE I ON NI-H AND NI-HYDRIDE CELLS WHICH ARE AT VARIOUS STAGES OF AGING AT EAGLE-PICHER, JOPLIN, MO. THROUGH ADVANCED DETECTION TECHNIQUES AND THEORETICALLY BASED ACCELERATION MODELS IT IS PREDICTED THAT NI-H AND NI-HYDRIDE ACCELERATED BATTERY TESTS CAN BE SHORTENED TO 6 MONTHS TO A YEAR COMPARED TO CURRENT TECHNOLOGY WHICH REQUEST 5 YEARS OF TESTING. TRI/AUSTIN WILL USE ITS EXISTING CAPABILITIES IN IMPEDANCE SPECTROSCOPY AND ACCELERATED TEST DESIGN TO REACH A FEASIBILITY DETERMINATION IN THE PHASE I TIME FRAME. BENEFITS RESULTING FROM REDUCED TEST TIME FOR BATTERIES TRANSLATE DIRECTLY INTO COST SAVINGS, AND THE SUCCESS OF THE PROPOSED EFFORT SHOULD REDUCE TEST COSTS FOR NI-H AND NI-HYDRIDE BATTERIES FIVE FOLD. COMMERCIAL BATTERY TEST COSTS WOULD BE REDUCED IN THE SAME MANNER, AND THERE IS THE POTENTIAL FOR AN INDUSTRY-WIDE STANDARD TEST PROCEDURE APPLICABLE TO A WIDE VARIETY OF BATTERY DEVELOPMENT EFFORTS.

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

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