Nickel-metal hydride batteries having high power electrodes and low-resistance electrode connections
AssigneeOvonic Battery Company, Inc.
InventorsBenjamin Reichman, Srinivasan Venkatesan, Stanford R. Ovshinsky, Michael A. Fetcenko
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Abstract
Nickel-metal hydride batteries and electrodes capable of increased power output and recharge rates. The positive and negative electrodes may be formed by pressing powdered metal-hydride active materials into porous metal substrates. The porous metal substrates are formed from copper, copper-plated nickel, or a copper-nickel alloy. The electrode tab are directly attached to the porous metal substrate via a low electrical-resistance connection which includes welding, brazing, or soldering.
Claims14
In a nickel-metal hydride battery having
- at least one negative electrode including a porous metal substrate, and
- an electrode tab attached to said electrode, the improvements comprising:
- said porous metal substrate comprising copper, copper-plated nickel, or a copper-nickel alloy having a resistivity less than pure nickel, and wherein the copper is exposed to electrolyte, and
- said electrode tab is directly attached to said porous metal substrate and said negative electrode operating in the immunity region pertaining to voltage and pH for copper metal.
In a negative electrode for use in a nickel-metal hydride battery, said negative electrode having a porous metal substrate, said negative electrode attached to an electrode tab, the improvements comprising:
- said porous metal substrate comprising copper, copper plated nickel, or a copper-nickel alloy having a resistivity less than pure nickel, and wherein the copper is exposed to electrolyte, and
- said electrode tab is directly attached to said substrate and said negative electrode operating in the immunity region pertaining to voltage and pH for copper metal.
In a nickel-metal hydride battery having
- at least one negative electrode including a porous metal substrate, and
- an electrode tab attached to said electrode, the improvements comprising:
- said porous metal substrate comprising substantially pure copper, and wherein the copper is exposed to electrolyte, and
- said electrode tab is directly attached to said porous metal substrate and said negative electrode operating in the immunity region pertaining to voltage and pH for copper metal.
In a negative electrode for use in a nickel-metal hydride battery, said negative electrode having a porous metal substrate, said negative electrode attached to an electrode tab, the improvements comprising:
- said porous metal substrate comprising substantially pure copper, and wherein the copper is exposed to electrolyte, and
- said electrode tab is directly attached to said porous metal substrate and said negative electrode operating in the immunity region pertaining to voltage and pH for copper metal.
Dependencies are inferred from the claim text.