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US 7,455,929 B2Granted
Air cell with improved leakage resistance
AssigneeEveready Battery Company, Inc.
InventorsRobert B. Dopp, John C. Bailey, Richard L. Middaugh
Life of this patent
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Abstract
An electrochemical battery cell with an oxygen reduction electrode and having improved electrolyte leakage resistance. The cell includes a component, disposed between the oxygen reduction electrode and an air inlet in the cell housing, through or around which air can pass. Upon contact with electrolyte, the component is transformed to form an electrolyte seal.
Claims54
An electrochemical battery cell comprising:
- a non-hermetically sealed housing comprising a first wall having at least one air inlet;
- an oxygen reduction electrode disposed within the housing and comprising an oxygen reduction layer and an electrolyte impermeable layer, the electrolyte impermeable layer being disposed between the oxygen reduction layer and the first wall of the container;
- an electrolyte disposed within the housing;
- and
- a transformable component disposed between the housing wall having the at least one air inlet and the oxygen reduction electrode;
- wherein the transformable component, when contacted by the electrolyte, is capable of transformation to an electrolyte sealing component.
3 more elements
An electrochemical battery cell comprising:
- a non-hermetically sealed housing comprising a first wall having at least one air inlet;
- an oxygen reduction electrode disposed within the housing;
- an electrolyte disposed within the housing;
- an initially air permeable component disposed between the oxygen reduction electrode and the first wall of the housing, the initially air permeable component comprising a material that, when contacted by the electrolyte, is capable of transforming the initially air permeable component into an electrolyte sealing component.
1 more element
An electrochemical battery cell comprising:
- a non-hermetically sealed housing comprising a first wall having at least one air inlet;
- an oxygen reduction electrode disposed within the housing and comprising an oxygen reduction layer and an electrolyte impermeable layer, the electrolyte impermeable layer being disposed between the oxygen reduction layer and the first wall of the container;
- an electrolyte disposed within the housing;
- and
- a transformable component comprising a base material comprising pores disposed between the housing wall having the at least one air inlet and the oxygen reduction electrode;
- wherein the transformable component comprises a surface facing the oxygen reduction electrode, a pressure applied to that surface is capable of transforming the transformable component to an electrolyte sealing component and the transformation comprises at least a partial collapse of the pores.
3 more elements
Dependencies are inferred from the claim text.