Comparison of “AA” nickel metal hydride cells with “AA” Ni-Cd cells

Author

Alminauskas, Vaidevutis ; Johnson, William

Author_Institution

Dept. of Power Sources, Naval Surface Warfare Center, Crane, IN, USA

Volume

2

fYear

1996

fDate

11-16 Aug 1996

Firstpage

1144

Abstract

This paper compares “AA” size nickel metal hydride (Ni-MH) cells with comparable “AA” nickel cadmium (Ni-Cd) cells both of which were obtained in 1993. The Ni-MH cells were found to be a suitable substitute for conventional Ni-Cd cells. Both these cell types have similar voltages and discharge characteristics. The Ni-MH cells, though, had nearly twice the capacity as comparable Ni-Cd cells. There was no significant difference in self discharge between the two types of cells. The Ni-MH cells also performed as well as Ni-Cd cells at rates lower than 5 amperes and at temperatures higher than 0°C (32°F). The most interesting finding is that the Ni-MH cells showed an irreversible decay of the discharge voltage with each cycle which was more noticeable during pulses. Eventually the Ni-MH packs fail, not because of loss of capacity, but because of low voltage during the pulse

Keywords

cadmium; electrochemistry; nickel; secondary cells; testing; AA size secondary batteries; Ni-Cd; Ni-MH rechargeable cells; cycling; discharge characteristics; irreversible discharge voltage decay; loss of capacity; self discharge; voltages; Batteries; Cadmium; Cranes; Low voltage; Nickel; Performance evaluation; Production; Standards development; Temperature; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Engineering Conference, 1996. IECEC 96., Proceedings of the 31st Intersociety

Conference_Location

Washington, DC

ISSN

1089-3547

Print_ISBN

0-7803-3547-3

Type

conf

DOI

10.1109/IECEC.1996.553869

Filename

553869