Electrode structure for electrochemical cell

• US 4,539,273 A
• Filed: 12/07/1983
• Issued: 09/03/1985
• Est. Priority Date: 12/07/1983
• Status: Expired due to Fees

• Current Assignee: Yardney Technical Products, Inc. (Vectra Corp.)
• Original Assignee: GTE Government Systems Corporation (General Dynamics Corporation)
• Inventors: Goebel, Franz
• Primary Examiner(s): Skapars, Anthony
• Application Number:
  US06/559,060
• Time in Patent Office: 636 Days
• Field of Search: 429/94, 429/156, 429/157, 429/158, 429/159, 429/161, 429/194, 429/196, 429/101, 429/211
• US Class Current: 429/94
• CPC Class Codes: H01M 6/10 with wound or folded electrodes
• CPC Class Codes: H01M 6/14 Cells with non-aqueous electrolyte

Abstract

An electrode assembly adaptor to be wound on a spool to provide a battery stack for an electrochemical cell. The spool has a central post of insulating material and two conductive flanges. The electrode assembly includes two elongated electrode structures, an anode electrode structure and a cathode current collector electrode structure. Each electrode structure includes a metal substrate having deflective, resilient contact tabs spaced along one edge. An appropriate electrode material is adherent to the substrate. The electrode assembly of the two electrode structures with intervening insulating material is adapted to be wound around the post of the spool with the contact tabs of the anode electrode structure making contact with one of the flanges and with the contact tabs of the cathode current collector electrode structure making contact with the other flange.

Claims

1. An electrode structure adapted for use in a battery stack of an electrochemical cell employing a spool having first and second conductive contact members with a post therebetween supporting the contact members in fixed relationship and electrically insulated from each other;

the electrode structure comprising

an elongated substrate of thin, solid, metal having one edge and an opposite edge along its length;

electrode material adherent to the substrate; and

a plurality of deflective, resilient contact elements spaced along said one edge of the substrate;

said opposite edge of said elongated substrate being protected by insulating material positioned at said opposite edge to prevent electrical contact with said other of said contact members;

said electrode structure being adapted to be wound around said post with said contact elements bearing against one of said conductive contact members to provide physical and electrical contact therewith and urging said insulating material against the other of said conductive contact members.

2. An electrode structure in accordance with claim 1 wherein

electrode material is adherent to both sides of said substrate.

3. An electrode structure in accordance with claim 2 wherein

said contact elements include a plurality of deflective, resilient tabs of the metal of the substrate spaced along said one edge thereof and extending beyond the electrode material.

4. An electrode structure in accordance with claim 3 wherein the deflective, resilient tabs of the metal of the substrate are each of curved configuration in a direction to facilitate movement of the electrode structure into position toward the center of the spool during winding of the electrode structure around the post.

5. An electrode structure in accordance with claim 4 wherein

said electrode material is an oxidizable active anode material.

6. An electrode structure in accordance with claim 4 wherein

said electrode material includes a catalyst material for reducing liquid cathode material.

7. An electrode assembly adapted to be wound on a spool having first and second conductive contact members with a post therebetween supporting the contact members in fixed relationship and electrically insulated from each other to provide a battery stack for an electrochemical cell;

the electrode assembly comprising

a first electrode structure comprising

an elongated substrate of thin, solid, metal having one edge and an opposite edge along its length;

first electrode material adherent to said substrate;

a plurality of deflective, resilient contact elements spaced along said one edge of said substrate;

said opposite edge of said elongated substrate of said first electrode structure being protected by insulating material positioned at said opposite edge to prevent electrical contact with said second conductive contact member;

a second electrode structure comprising

an elongated substrate of thin, solid, metal having one edge and an opposite edge along its length;

second electrode material adherent to said substrate;

a plurality of deflective, resilient contact elements spaced along said one edge of said substrate;

said opposite edge of said elongated substrate of said second electrode structure being protected by insulating material positioned at said opposite edge to prevent electrical contact with said first conductive contact member;

porous insulating material separating said first and second electrode structures;

said first and second electrode structures and said porous insulating material being adapted to be wound around said post with said contact elements of the first electrode structure bearing against said first conductive contact member to provide physical and electrical contact therewith and urging said insulating material against said second conductive contact member, and with said contact elements of the second electrode structure bearing against said second conductive contact member to provide physical and electrical contact therewith and urging said insulating material against said first conductive contact member.

8. An electrode assembly in accordance with claim 7 wherein

said first electrode material is adherent to both sides of said substrate of said first electrode structure;

and

said second electrode material is adherent to both sides of said substrate of said second electrode structure.

9. An electrode assembly in accordance with claim 8 wherein

said contact elements of said substrate of said first electrode structure includes a plurality of deflective, resilient tabs of the metal of the substrate spaced along said one edge thereof and extending beyond the first electrode material;

and

said contact elements of said substrate of said second electrode structure includes a plurality of deflective, resilient tabs of the metal of the substrate spaced along said one edge thereof and extending beyond the second electrode material.

10. An electrode assembly in accordance with claim 9 wherein

the deflective, resilient tabs of the metal of the substrate of the first electrode structure are each of curved configuration in a direction to facilitate movement of the first electrode structure into position toward the center of the spool during winding of the electrode assembly around the post;

and

the deflective, resilient tabs of the metal of the substrate of the second electrode structure are each of curved configuration in a direction to facilitate movement of the second electrode structure into position toward the center of the spool during winding of the electrode assembly around the post.

11. An electrode assembly in accordance with claim 10 wherein

said first electrode material is an oxidizable active anode material;

and

said second electrode material includes a catalyst material for reducing liquid cathode material.