Continuous consumable anode

• US 4,916,036 A
• Filed: 10/20/1988
• Issued: 04/10/1990
• Est. Priority Date: 10/20/1988
• Status: Expired due to Fees

• Current Assignee: Dreisbach Electromotive Incorporated
• Original Assignee: Dreisbach Electromotive Incorporated
• Inventors: Cheiky, Michael C.
• Primary Examiner(s): Kalafut, Stephen J.
• Application Number:
  US07/260,477
• Time in Patent Office: 537 Days
• Field of Search: 429/127, 429/233, 429/234, 429/242
• US Class Current: 429/127
• CPC Class Codes: H01M 12/04 composed of a half-cell of the fuel-cell type and of a half-cell of the primary-cell type
• CPC Class Codes: H01M 4/12 of consumable metal or alloy electrodes use of alloy compositions as active materials H01M4/38
• CPC Class Codes: H01M 4/64 Carriers or collectors
• CPC Class Codes: H01M 8/22 Fuel cells in which the fuel is based on materials comprising carbon or oxygen or hydrogen and other elements; Fuel cells in which the fuel is based on materials comprising only elements other than carbon, oxygen or hydrogen
• CPC Class Codes: Y02E 60/50 Fuel cells

Abstract

A consumable anode of a reactive metal such as lithium is provided as a layer on a flexible, conductive substrate. The anode is preferably in the form of an elongated tape wound on a reel. The anode tape is fed from the reel into and through an elongated electrolyte reaction chamber formed between the surface of the anode tape and an opposed cathode. The ends of the compartment contain seals for retaining electrolyte between the electrodes. The tape is rewound on a driven take up reel.

Claims

1. A continuous electrode for an electrochemical cell comprising:

a length of flexible tape wound into a cylindrical coil and mounted on a rotatable hub, said tape having a leading edge containing a releasable connector member adapted to engage a second connector member on a second tape, said flexible tape being formed of a first layer of metal consumable by an electrochemical cell and the first layer being bonded to an inert, conductive substrate.

2. An electrode according to claim 1 in which the releasable connector includes a reverse bent forward edge forming a first hook adapted to slidingly engage a complementary shaped second hook on another tape.

4. An electrode according to claim 1 in which the substrate is discontinuous.

5. A substrate according to claim 4 in which the substrate if formed of perforated metal.

3. A continuous electrode for an electrochemical cell comprising:

a length of flexible tape formed of a first layer of metal consumable by an electrochemical and being reactive with a gas, said first layer being bonded to an inert, conductive substrate; and

a layer of protective liquid applied to the surface of the first layer that is impermeable to said gas.

6. A continuous electrode for an electrochemical cell comprising:

a length of flexible tape formed of a first layer of metal consumable by an electrochemical cell, said first layer being bonded to an inert conductive substrate which is formed of a film of non-conductor containing a pattern of conductive studs extending from the rear surface of the first layer to the outside surface of the substrate.

7. A continuous electrode for an electrochemical cell comprising:

a length of flexible tape formed of a first layer of metal consumable by an electrochemical cell, said first layer being bonded to a substrate which is formed of a layer of non-conductor containing at least one discrete axial band of conductor.

8. An electrode according to claim 7 in which the non-conductor is a synthetic resin.

9. A continuous electrode for an electrochemical cell comprising:

a length of flexible tape formed of a first layer of metal consumable by an electrochemical cell which comprises at least 50 percent by weight of lithium, said first layer being bonded to an inert conductive substrate including a film of metal having low hydrogen overpotential attached to the bottom surface of the first layer.

10. An electrode according to claim 9 in which the film comprises titanium, zirconium or tin.

11. An electrode according to claim 9 further including a layer of structural metal attached to the film.

12. An electrode according to claim 11 in which the film comprises titanium and the structural metal is stainless steel.

13. A battery comprising in combination:

a casing enclosing an anode compartment and a second compartment, an elongated battery chamber and a spent anode take-up assembly.

said anode compartment including journal means for rotating a reel containing a roll of flexible anode tape;

said battery chamber having an inlet for receiving the anode tape and an outlet for feeding the spent anode tape to the take-up assembly disposed in the second compartment.

a cathode disposed opposite the anode and forming one side of the battery chamber; and

a layer of electrolyte received in the battery chamber between the anode tape and the cathode.

14. A battery according to claim 13 in which the anode tape includes a layer containing lithium mounted on a conductive substrate.

15. A battery according to claim 14 in which the cathode is a gas-permeable cathode.

16. A battery according to claim 13 in which the inlet and the outlet include seals for retaining the electrolyte in the chamber.