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US 10,096,875 B2Granted
System and method for increasing electrical efficiency of metal-air cell
AssigneePhinergy Ltd.
InventorsYisrael Miller, Avraham Yadgar, Dekel Tzidon
Life of this patent
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Abstract
Flow directing element in a metal air cell is configured to cause evenly distributed flow of aqueous electrolyte solution electrolyte in it over the anode. Flow distributing element in a metal air cell is configured to lengthen the path of electrolyte flow from an inlet to the anode, thereby to increase ohmic resistance to shunt currents in the cell. A battery with these cells consumes the metal in the metal anodes evenly and with minimized shunt currents.
Claims20
A metal-air cell comprising:
- an air electrode;
- an aqueous electrolyte solution inlet located at a first wall of the metal air cell;
- an aqueous electrolyte solution outlet located at a second wall opposite to the first wall, wherein the first and second walls have a first length;
- a metal anode disposed between the first wall and the second wall, whereby a flow path of the aqueous electrolyte solution is from the inlet to the outlet over a surface of the metal anode;
- at least one flow distributing element positioned immediately after the inlet perpendicular to a direction of flow of the aqueous electrolyte solution, wherein the at least one flow of the aqueous electrolyte arrives from the inlet, through an hydraulic passage formed by the presence of the flow distributing element and over the surface of the anode, wherein a longitudinal dimension of the at least one flow distributing element is parallel to the first wall or to the second wall;
- and
- at least one slotted element for directing flow of the aqueous electrolyte solution over a surface of the anode, that includes a plurality of slits to direct the flow of the aqueous electrolyte solution over the surface of the metal anode, wherein the slotted element is positioned adjacent to the metal anode.
4 more elements
A metal air cell comprising:
- an air electrode;
- an aqueous electrolyte solution inlet located at a first wall of the metal air cell;
- an aqueous electrolyte solution outlet located at a second wall opposite to the first wall, wherein the first and second walls have a first length;
- a metal anode disposed between the first wall and the second wall, whereby a flow path of the aqueous electrolyte solution is from the inlet to the outlet over a surface of the metal anode;
- and
- at least one flow distributing element positioned immediately after the inlet perpendicular to a direction of flow of the aqueous electrolyte solution, wherein the at least one flow of the aqueous electrolyte arrives from the inlet, through an hydraulic passage formed by the presence of the flow distributing element and over the surface of the anode, wherein a longitudinal dimension of the at least one flow distributing element is parallel to the first wall or to the second wall, and wherein the at least one flow distributing element is designed to cause an extension of the length of flow path from the inlet to the metal anode by at least 1.5 times the first length.
3 more elements
A metal-air battery comprising:
- two or more cells having substantially the same dimensions,
- an aqueous electrolyte solution passage for introducing aqueous electrolyte solution to the two or more cells, wherein each of the cells comprises:
- an aqueous electrolyte solution inlet located at a first wall of the cell;
- an aqueous electrolyte solution outlet located at a second wall opposite to the first wall, wherein the first and second walls have a first length;
- a metal anode disposed between the first wall and the second wall, whereby a flow path of the aqueous electrolyte solution is from the inlet to the outlet over a surface of the metal anode;
- at least one air electrode located in the vicinity of the metal anode;
- one or more flow distributing elements positioned immediately after the inlet perpendicular to the direction of flow of the aqueous electrolyte solution, wherein the at least one flow of the aqueous electrolyte arrives from the inlet, through an hydraulic passage formed by the presence of the flow distributing element and over the surface of the anode, wherein a longitudinal dimension of each of the one or more flow distributing elements is parallel to the first wall or to the second wall, and wherein a resistance to the flow in each cell is substantially the same;
- and
- at least one slotted element for directing flow of the aqueous electrolyte solution over a surface of the anode, that includes a plurality of slits to direct the flow of the aqueous electrolyte solution over the surface of the metal anode, wherein the slotted element is positioned adjacent to the metal anode.
6 more elements
Dependencies are inferred from the claim text.