Metal hydride battery with added hydrogen gas, oxygen gas or hydrogen peroxide
AssigneeNilar International AB
InventorDag NORÉUS
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Abstract
The invention relates to a starved metal hydride battery. The battery is characterized in that the battery further comprises added oxygen gas or hydrogen gas or hydrogen peroxide or a combination thereof in order to rebalance the electrodes and replenish the electrolyte by reactions with the electrode materials.
Claims23
A battery comprising:
- a housing containing at least one cell;
- wherein the at least one cell includes a first electrode, a second electrode, a porous separator arranged between the first electrode and the second electrode, and an aqueous alkaline electrolyte arranged between the first electrode and the second electrode;
- wherein the separator, the first electrode and the second electrode are configured to allow exchange of hydrogen and oxygen by allowing gas to migrate between the two electrodes;
- wherein the housing includes means for adding a gas or a liquid to the housing;
- and
- wherein the battery further includes added oxygen gas or hydrogen gas or hydrogen peroxide or a combination thereof rebalance the electrodes and replenish the electrolyte by reactions with electrode materials.
A battery comprising:
- a housing containing at least one cell;
- wherein the at least one cell includes a first electrode, a second electrode, and an aqueous alkaline electrolyte arranged between the first electrode and the second electrode;
- wherein the first electrode is a metal hydride electrode (MH) and the second electrode is a nickel hydroxide electrode (Ni(OH)2/NiOOH) further comprising cobalt hydroxide (Co(OH)2/CoOOH);
- and
- wherein the housing includes means for adding a gas or a liquid to the housing;
- wherein the battery further includes added hydrogen peroxide.
A method of counteracting the negative effects of corrosion of a metal hydride electrode in a battery that has a housing containing at least one cell, wherein the at least one cell includes a first electrode, a second electrode, and an aqueous alkaline electrolyte arranged between the first and the second electrode, wherein the first electrode is the metal hydride electrode (MH) and the second electrode is a nickel hydroxide electrode (Ni(OH)2/NiOOH), and wherein the housing includes means for adding a gas or a liquid to the housing;
- wherein the method comprises adding oxygen gas or hydrogen gas or hydrogen peroxide or a combination thereof to the battery at any state of charge (SOC).
A method of replenishing an aqueous alkaline electrolyte in a battery that has a housing containing at least one cell, wherein the at least one cell includes a first electrode, a second electrode, and the aqueous alkaline electrolyte arranged between the first electrode and the second electrode, wherein the first electrode is a metal hydride electrode (MH) and the second electrode is a nickel hydroxide electrode (Ni(OH)2/NiOOH), and wherein the housing includes means for adding a gas or a liquid to the housing;
- wherein the method comprises adding oxygen gas or hydrogen gas or hydrogen peroxide or a combination thereof to the battery to create water by the recombination reactions of the respective gases with active electrode materials in the battery.
A method of re-establishing the balance between a first electrode and a second electrode in a battery that has a housing containing at least one cat wherein the at least one cell includes the first electrode, the second electrode, and an aqueous alkaline electrolyte arranged between the first electrode and the second electrode, wherein the first electrode is a metal hydride electrode (MH) and the second electrode is a nickel hydroxide electrode (Ni(OH)2/NiOOH), and wherein the housing further includes means for adding a gas or a liquid to the housing;
- wherein the method comprises adding oxygen gas or hydrogen gas or hydrogen peroxide or a combination thereof to the battery.
Dependencies are inferred from the claim text.