Chemistry: electrical current producing apparatus – product – and – Sealed cell having gas prevention or elimation means – Prevention or elimination means is one of the cell...
Patent
1994-02-09
1995-09-05
Kalafut, Stephen
Chemistry: electrical current producing apparatus, product, and
Sealed cell having gas prevention or elimation means
Prevention or elimination means is one of the cell...
429128, 429235, 429246, H01M 216, H01M 480
Patent
active
054478065
ABSTRACT:
A gas-tight nickel/hydride battery with a high oxygen consumption rate and a correspondingly low internal pressure has a stacked arrangement of positive and negative electrodes wherein the negative electrodes are divided in two with a coarse supporting framework as a space between the resulting partial electrodes. Gas impermeable microporous separators deflect the oxygen stream emerging from the positive electrodes to faces of the negative partial electrodes. The spacer provides an inner space with walls defining an enlarged area for reducing the deflected oxygen stream. Because the micropores are completely filled with electrolyte due to their capillary activity, the microporous separators also permit the construction of nickel/hydride batteries with cell heights which could not otherwise be achieved in alkaline batteries with nonwoven fabric separators.
REFERENCES:
patent: 711481 (1902-10-01), Daboll
patent: 3351490 (1967-11-01), Van Doehren
patent: 4687719 (1987-08-01), Von Benda et al.
Hoge Detlev
Kohler Uwe
Kalafut Stephen
Varta Batterie Aktiengesellschaft
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