Chemistry: electrical current producing apparatus – product – and – Means externally releasing internal gas pressure from closed... – Elastic – resilient or spring biasing valve means
Patent
1990-08-16
1992-01-14
Pal, Asok
Chemistry: electrical current producing apparatus, product, and
Means externally releasing internal gas pressure from closed...
Elastic, resilient or spring biasing valve means
310 50, 318139, 429 57, 429 72, 429163, H02J 700, H01M 1002
Patent
active
050809830
ABSTRACT:
A battery including a vent tower extending inwardly into the battery cell and terminating at a free end. A passageway is provided through the vent tower to allow the venting of gas. The vent tower includes a porous, hydrophobic filter in the passageway adjacent the free end of the vent tower, and a pressure-relief valve in the passage. The free end of the vent tower is spaced sufficiently from any wall of the battery casing that any void defined by a horizontal plane along the free end of the vent tower and the walls of the casing below the horizontal plane is greater than the volume of free electrolyte regardless of the orientation of the battery.
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Alexon Charles E.
Scholz Matthew T.
Zaspel Robert P.
Bauer Stephen W.
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Pal Asok
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