Accession Number : ADA320764

Title :   Nickel-Metal Hydride Battery Technology Evaluation.

Descriptive Note : Final rept. 14 Jun 94-15 Mar 96,

Corporate Author : GENERAL RESEARCH CORP INTERNATIONAL FAIRBORN OH

Personal Author(s) : Erbacher, John K.

PDF Url : ADA320764

Report Date : APR 1996

Pagination or Media Count : 146

Abstract : Available cylindrical and prismatic commercial Ni-MH batteries using AB5 and AB2 cathodes were evaluated for application to military aircraft batteries. Self discharge, capacity, and constant discharge and charge current tests were conducted along with some equipment limited internal resistance tests. Commercial AB5 technology is further advanced than AB2 technology and would require less development for near term (3-5 years) applications. Cylindrical and prismatic AB5 cells will require alloy, electrolyte and single cell/battery development to increase discharge and charge current capability to 10C and 5C respectively; and extend the low temperature limit to at least -20 deg C. Tested AB2 technology appears inadequate to meet the near term military requirements and would require a major advance in the alloy to overcome the irreversible capacity loss incurred at temperatures above 49 deg C. In addition, alloy, electrolyte and single cell/battery development would be needed to extend the low temperature limit by 30 degrees to at least -20 deg C, and to double the charge and quadruple the discharge current capabilities of this technology. p3

Descriptors :   *METALS, *HYDRIDES, *STORAGE BATTERIES, *NICKEL CADMIUM BATTERIES, TEST AND EVALUATION, LOW TEMPERATURE, MILITARY REQUIREMENTS, MILITARY AIRCRAFT, CAPACITY(QUANTITY), MILITARY EQUIPMENT, RESISTANCE, ELECTROCHEMISTRY, CATHODES, ELECTRIC DISCHARGES, LOSSES, ELECTRIC CURRENT, ELECTROLYTES, IRREVERSIBLE PROCESSES, ELECTRIC CHARGE.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Electrochemical Energy Storage
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE