Terminal means for electrochemical cells

• US 4,734,342 A
• Filed: 01/29/1987
• Issued: 03/29/1988
• Est. Priority Date: 01/29/1986
• Status: Expired due to Fees

• Current Assignee: Westinghouse Electric Company LLC (Brookfield Asset Management Incorporated)
• Original Assignee: Gould, Inc. (Transdigm Group Incorporated)
• Inventors: Seiger, Harvey N.
• Primary Examiner(s): Walton, Donald L.
• Application Number:
  US07/009,033
• Time in Patent Office: 425 Days
• Field of Search: 429/152, 429/153, 429/154, 429/155, 429/178, 429/211, 429/156, 429/157, 429/158, 429/159
• US Class Current: 429/152
• CPC Class Codes: H01M 50/553 Terminals adapted for prismatic, pouch or rectangular cells
• CPC Class Codes: H01M 50/559 Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells H01M50/553 takes precedence
• CPC Class Codes: H01M 6/48 with bipolar electrodes

Abstract

A terminal pattern is disclosed for an assembly of reactive metal electrochemical cells which includes a plurality of bipolar electrodes arranged in stacked, spaced relationship and connected in series between a pair of spaced conductive end plates. The terminal pattern on each end plate of the assembly includes an array of interconnected terminal segments of high conductive material disposed outwardly of a center point of the respective end plate in a generally uniform pattern with respect to the area configuration of the end plate. The pattern of terminal segments enlarge the terminal area and provide more uniform current distribution and active metal consumption over the areas of the bipolar electrodes.

Claims

1. In an assembly of reactive metal electrochemical cells which includes a plurality of bipolar electrodes connected in series between a pair of spaced conductive end plates, terminal means of higher conductive material than said end plates on each said end plate comprising an array of interconnected termnial segment means disposed outwardly of a center point of the respective end plate in a generally uniform pattern with respect to the area configuration of the end plate to thereby enlarge the terminal area and to provide more uniform current distribution and active metal consumption over the areas of the bipolar electrodes.

2. In a reactive metal electrochemical cell assembly as set forth in claim 1, wherein said terminal means include a center connecting terminal portion.

3. In a reactive metal electrochemical cell assembly as set forth in claim 2, wherein said interconnected terminal segment means include a plurality of outer segments spaced outwardly of the center connecting terminal portion.

4. In a reactive metal electrochemical cell assembly as set forth in claim 3, including spoke-like terminal segments interconnecting the outer segments to the center connecting terminal portion.

5. In a reactive metal electrochemical cell assembly as set forth in claim 3 or 4, wherein the outer segments are in a circular array.

6. In a reactive metal electrochemical cell assembly as set forth in claim 5, wherein the outer segments form a complete, concentric circle about the center connecting terminal portion.

7. In a reactive metal electrochemical cell assembly as set forth in claim 5, wherein the outer segments comprise equally spaced segments of a circle concentric about the center connecting terminal portion with one of said spoke-like segments between each outer segment and the center connecting terminal portion.

8. In a reactive metal electrochemical cell assembly as set forth in claim 3 or 4, wherein the outer segments are in a polygonal array about the center connecting terminal portion.

9. In a reactive metal electrochemical cell assembly as set forth in claim 8, wherein each side segment of the polygonal array is connected by one of said spoke-like segments to the center connecting terminal portion.

10. In a reactive metal electrochemical cell assembly as set forth in claim 1, wherein said array of terminal segment means include outer segments arranged in a circular pattern about said center point.

11. In a reactive metal electrochemical cell assembly as set forth in claim 1, wherein said array of terminal segment means include outer segments arranged in a polygonal pattern about said center point.

12. In a reactive metal electrochemical cell assembly as set forth in claim 1, wherein said interconnected terminal segment means include an array of outer segments spaced outwardly of said center point.

13. In a reactive metal electrochemical cell assembly as set forth in claim 10, 11 or 12, wherein the area of the respective end plate bounded by said array of outer segments is substantially equal to the area of the end plate outside the bounds of the outer terminal segment means.

14. In a reactive metal electrochemical cell assembly as set forth in claim 10, 11 or 12, wherein the outer segments are spaced outwardly of the center point on the order of 0.70 the distance from the center point to the periphery of the respective end plate.

15. In a reactive metal electrochemical cell assembly as set forth in claim 1, wherein the area bounded by said terminal segment means is equal to the area of the respective end plate outside the bounds of the terminal segment means.

16. In an assembly of reactive metal electrochemical cells which include a plurality of bipolar electrodes connected in series between a pair of conductive end plates, terminal means of higher conductive material than said end plates on each said end plate comprising a center connecting terminal portion, an array of outer terminal segment means disposed outwardly of the center terminal portion, and spoke-like terminal segments interconnecting the outer terminal segment means to the center terminal portion, the area of the respective end plate bounded by the array of outer terminal segment means being substantially equal to the area of the end plate outside the bounds of the outer terminal segment means.

17. In a reactive metal electrochemical cell assembly as set forth in claim 16, wherein said array of outer terminal segment means is arranged in a circular pattern about the center terminal portion.

18. In a reactive metal electrochemical cell assembly as set forth in claim 16, wherein said array of outer terminal segment means is arranged in a polygonal pattern about the center terminal portion.

19. Terminal means on at least one conductive end plate of an assembly of reactive metal electrochemical cells, comprising a terminal pattern of higher conductive material than said end plate disposed outwardly of a center point of the end plate, the pattern being generally uniform with respect to the area configuration of the end plate, whereby the terminal area is enlarged and more uniform current distribution and active metal consumption over the electrochemical cell electrodes are provided.

20. The terminal means of claim 19 wherein the configuration of said terminal pattern is generally circular.

21. The terminal means of claim 19 wherein the configuration of said terminal pattern is generally polygonal.

22. The terminal means of claims 19, 20 or 21 wherein the area of the end plate bounded by said terminal pattern is generally equal to the area of the end plate outside the pattern.