Galvanic primary cell
AssigneeVarta Batterie Aktiengesellschaft
InventorsUllrich Costenoble, Rolf Hennrich
Life of this patent
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Abstract
In a galvanic primary cell, the anode mixture of a zinc-alkaline electrolyte gel is displaced by the introduction of a hollow body into the concentrically arranged anode space so that the zinc powder is fixed in a layer oriented toward the cathode of the cell, ensuring proper discharge, and so that the aqueous portion of the anode mixture can escape inside the displacement body through narrow openings in the body's wall. By attaching the displacement body to the negative electrode conductor, the current drainage can be improved by making at least part of the displacement body of a metallically conducting material.
Claims17
In a galvanic primary cell with a thickened alkaline electrolyte and which contains an inner space for containing a negative electrode comprised of a pasty zinc powder, an outer positive manganese dioxide or silver oxide electrode in the form of a ring-shaped cylinder, and an interposed separator, disposed in concentric arrangement in a cup-shaped metal housing, the improvement comprising:
- a hollow displacement body which is concentrically located in said inner space so that the zinc powder is radially pressed against the surface of the positive electrode.
In a galvanic primary cell with a thickened alkaline electrolyte and which contains an inner space for containing a negative electrode comprised of a pasty zinc powder, an outer positive manganses dioxide or silver oxide electrode in the form of a ring-shaped cylinder, and an interposed separator, disposed in concentric arrangement in a cup-shaped metal housing, the improvement comprising:
- a hollow displacement body which is concentrically located in said inner space so that the zinc powder is radially pressed against the surface of the positive electrode, and which includes slit-like openings for permitting said electrolyte to move into said hollow body.
In a galvanic primary cell with a thickened alkaline electrolyte and which contains an inner space for containing a negative electrode comprised of a pasty zinc powder, an outer positive manganese dioxide or silver oxide electrode in the form of a ring-shaped cylinder, and an interposed separator, disposed in concentric arrangement in a cup-shaped metal housing, the improvement comprising:
- a hollow displacement body which is concentrically located in said inner space and having a wall in contact with said negative electrode so that the zinc powder of said negative electrode is radially pressed against the surface of the positive electrode by said wall.
Dependencies are inferred from the claim text.