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US 2024/0194929 A1Published application
Battery Cell With Safety Layer
AssigneesDuracell U.S. Operations, Inc., National Technology & Engineering Solutions of Sandia, LLC
InventorsMichael Pozin, Walter Fred Paxton, Bryan James Kaehr
Life of this patent
Estimating the term…
Abstract
A battery cell comprising a composite water-responsive safety layer and/or composite water- and pH-responsive safety layer to protect against tissue damage and/or electrolysis, when the battery cell is exposed to aqueous solution or tissue, is provided. The composite water-responsive safety layer and/or composite water- and pH-responsive safety layer is adapted to change from a non-electronically conducting state to an electronically conducting state.
Claims20
A battery comprising:
- a housing, the housing comprising first and second poles;
- and
- a composite water-responsive safety layer comprising a polymer material and being positioned adjacent to at least one of the first and second poles, the composite water-responsive safety layer being adapted to short the battery to below 1.5V when contacted with an aqueous solution, the composite water-responsive safety layer further comprising at least one metal salt, wherein the composite water-responsive safety layer is disposed on an external surface of the battery.
A method comprising:
- providing a battery housing comprising first and second poles;
- forming a composite water-responsive safety layer between the first and second poles of the battery housing by depositing a composition between the poles such that the composition is adjacent to at least one of the first and second poles, the composition comprising a polymer material and at least one metal salt, the composite water-responsive safety layer being adapted to short the battery to below 1.5V when contacted with an aqueous solution, wherein the composite water-responsive safety layer is disposed on an external surface of the battery
Dependencies are inferred from the claim text.