Cell or battery state of discharge indicator
AssigneesSaft-Societe des Accumulateurs Fixes et de Traction, Compagnie Industrielle des Piles Electriques "Cipel"
InventorRobert Chevet
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Abstract
The invention relates to a discharge indicator of an electrochemical generator such as a cell or battery comprising a consumable negative electrode basically containing powdered metal, for example, zinc. The said indicator is constituted by an enclosure containing a substance which can be seen from the outside of the battery and having an appearance which changes on coming into contact with the electrolyte, the said enclosure being closed by a metal plate arranged within the negative electrode and which is made of a material chosen from among zinc, zinc alloys, zinc amalgams. Application of the indicator is to air depolarization cells.
Claims14
Electrochemical generator comprising a positive electrode, an electrolyte, a negative electrode basically containing a first consumable powdered metal and an indicator of the state of discharge of an electrochemical generator comprising a positive electrode, an electrolyte and a negative electrode basically containing a first consumable powdered metal, characterized in that said indicator comprises a sealed transparent enclosure containing a substance which is externally visible and whose appearance changes on coming into contact with the said electrolyte, the said enclosure being sealed by closure means made of a second metal having the same electrochemical behavior as the said first metal.
Electrochemical generator comprising a positive electrode, an electrolyte, a negative electrode of consumable powdered metal and state of discharge indicator means for said generator, said means comprising a sealed transparent enclosure, a substance contained within said enclosure which is visible externally of said generator and whose appearance changes on contact with said electrolyte, said enclosure having an opening, closure means sealing said opening and being of a second metal having the same electrochemical behavior as said first-named metal, said closure means of said enclosure being positioned in said negative electrode at a selected position and the substance in said enclosure being positioned to be visible externally of said generator for observation of its appearance which changes when the seal by said closure means is broken and electrolyte gains access through said opening to said substance.
Dependencies are inferred from the claim text.