Catalyst equipped vapor-communicating multi-cell valve regulated lead-acid battery

• US 6,524,747 B2
• Filed: 10/19/2001
• Issued: 02/25/2003
• Est. Priority Date: 06/17/1998
• Status: Expired due to Fees

• Current Assignee: C&D Technologies Incorporated (Angel Holdings LLC)
• Original Assignee: C&D Technologies Incorporated (Angel Holdings LLC)
• Inventors: Noveske, Terrence M., Holden, Leslie S., Misra, Sudhan S.
• Primary Examiner(s): Elve, M. Alexandra
• Assistant Examiner(s): JOHNSON, JONATHAN J
• Application Number:
  US09/999,871
• Publication Number:
  US 20020061434A1
• Time in Patent Office: 494 Days
• Field of Search: 429/48, 429/57, 429/58, 429/82, 429/84, 429/86, 429/175, 429/176, 429/225
• US Class Current: 429/225
• CPC Class Codes: H01M 10/0413 Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
• CPC Class Codes: H01M 10/0463 Cells or batteries with horizontal or inclined electrodes
• CPC Class Codes: H01M 10/121 Valve regulated lead acid batteries [VRLA]
• CPC Class Codes: H01M 10/52 Removing gases inside the secondary cell, e.g. by absorption vent plugs or other mechanical arrangements for facilitating escape of gases H01M50/30
• CPC Class Codes: H01M 10/523 by recombination on a catalytic material
• CPC Class Codes: H01M 50/308 Detachable arrangements, e.g. detachable vent plugs or plug systems
• CPC Class Codes: H01M 50/325 comprising deformable valve members, e.g. elastic or flexible valve members
• CPC Class Codes: H01M 50/383 Flame arresting or ignition-preventing means
• CPC Class Codes: H01M 50/394 Gas-pervious parts or elements
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A recombinant lead-acid battery comprising a plurality of lead-acid cells in a case including apertured partitions defining space for vapor migration among cells and comprising a catalyst unit communicating with said vapor migration space and enhancing recombination of hydrogen and oxygen.

Claims

1. A recombinant lead-acid battery comprising:

a. a case;

b. a plurality of lead-acid cells within said case, each cell comprising;

i. a plurality of positive and negative lead metal plates;

ii. electrolytes between at least some of said positive and negative plates;

c. said case including apertured partitions separating adjacent cells one from another and defining space for vapor migration among cells; and

d. at least one catalyst unit having catalyst material therein connected to said case and communicating with said vapor migration space for enhancing recombination of hydrogen and oxygen, wherein said at least one catalyst unit is not directly thermally-conductively coupled to said electrolytes.

2. The battery of claim 1 wherein said catalyst unit is at least partially within said case.

3. The battery of claim 1 wherein said catalyst unit is within said case.

4. The battery of claim 1 wherein said catalyst is palladium.

5. A recombinant lead-acid battery comprising:

a. a case comprising ajar and a cover;

b. a plurality of lead-acid cells within said jar, each cell comprising;

i. a plurality of upstanding positive and negative lead metal plates;

ii. electrolytes between at least some of said positive and negative plates;

C. said jar including upstanding partitions for separating adjacent cells one from another;

d. upper portions of said partitions being spaced from said cover to define space for vapor migration among cells;

e. at least one catalyst unit connected to said case and communicating with said vapor migration space for enhancing recombination of hydrogen and oxygen, wherein said at least one catalyst unit is not directly thermally-conductively coupled to said electrolytes.

6. The battery of claim 5 wherein a plurality of said catalyst units is provided, said catalyst units are of number less than said plurality of cells.

7. The battery of claim 5 wherein plates of a given polarity of respective cells have upstanding terminal tab portions extending above said upper portions of said partitions, and further comprising:

a. electrically conductive members connectingly extending between said terminal tab portions of plates of like polarity of adjacent cells.

8. The battery of claim 7 wherein said electrically conductive members are lead metal strips and are welded to respective terminal tab portions.

9. A recombinant lead-acid battery comprising:

a. a case comprising ajar and a cover;

b. a plurality of lead-acid cells within said jar, each cell comprising;

i. a plurality of upstanding positive and negative lead metal plates;

ii. electrolytes between at least some of said positive and negative plates;

c. said jar including upstanding partition portions for separating adjacent cells one from another;

d. said cover including downwardly extending partition portions aligned with said upstanding partition portions to define partitions which together with walls of said case form case compartments for said cells;

e. said partitions having apertures therethrough for vapor communication among cells in respective case compartments;

f. upper portions of said plates being spaced from said cover to define space for vapor residence;

g. at least one catalyst unit connected to said case and communicating with said vapor residence space for enhancing recombination of hydrogen and oxygen, wherein said at least one catalyst unit is not directly thermally-conductively coupled to said electrolytes.

10. The battery of claim 9 wherein a plurality of said catalyst units is provided, said catalyst units are of number less than said plurality of cells.

11. A recombinant lead-acid battery comprising:

a. a case comprising ajar and a cover;

b. a plurality of lead-acid cells within said jar, each cell comprising;

i. a plurality of upstanding positive and negative lead metal plates;

ii. electrolytes between at least some of said positive and negative plates;

c. said jar including upstanding partitions for separating adjacent cells one from another;

d. upper portions of said partitions being spaced from said cover to define space for vapor migration among cells;

e. at least one combination catalyst unit-vent valve removably connected to said case and communicating with said vapor migration space for enhancing recombination of hydrogen and oxygen and for permitting gas escape from said battery interior upon internal pressure reaching a predetermined level above atmospheric, wherein said at least one catalyst unit-vent valve is not directly thermally-conductively coupled to said electrolytes.

12. A recombinant lead-acid battery comprising:

a. a case comprising ajar and a cover;

b. a plurality of lead-acid cells within said jar, each cell comprising;

i. a plurality of upstanding positive and negative lead metal plates;

ii. electrolytes between at least some of said positive and negative plates;

c. said jar including upstanding partitions for separating adjacent cells one from another;

d. said cover including downwardly extending partition portions aligned with said upstanding partition portions to define partitions which together with walls of said case form case compartments for said cells;

e. said partitions having apertures therethrough for vapor communication among cells in respective case compartments;

f. upper portions of said plates being spaced from said cover to define space for vapor residence;

e. at least one combination catalyst unit-vent valve removably connected to said case and communicating with said vapor residence space for enhancing recombination of hydrogen and oxygen and for relieving battery internal pressure, wherein said at least one combination catalyst unit-vent valve is not directly thermally-conductively coupled to said electrolytes.

13. A recombinant lead-acid battery comprising:

a. a case comprising ajar and a cover;

b. a plurality of lead-acid cells within said jar, each cell comprising;

i. a plurality of upstanding positive and negative lead metal plates;

ii. electrolytes between at least some of said positive and negative plates;

c. said jar including upstanding partitions for separating adjacent cells one from another;

d. upper portions of said partitions being spaced from said cover to define space for vapor migration among cells;

e. at least one catalyst unit connected to said case and communicating with said vapor migration space for enhancing recombination of hydrogen and oxygen, said at least one catalyst unit being of number less than said plurality of said cells.

14. The battery of claim 13 wherein plates of a given polarity of respective cells have upstanding terminal tab portions extending above said upper portions of said partitions, and further comprising:

a. electrically conductive members connectingly extending between said terminal tab portions of plates of like polarity of adjacent cells.

15. The battery of claim 14 wherein said electrically conductive members are lead metal strips and are welded to respective terminal tab portions.

16. A recombinant lead-acid battery comprising:

a. a case comprising ajar and a cover;

b. a plurality of lead-acid cells within said jar, each cell comprising;

i. a plurality of upstanding positive and negative lead metal plates;

ii. electrolytes between at least some of said positive and negative plates;

c. said jar including upstanding partition portions for separating adjacent cells one from another;

d. said cover including downwardly extending partition portions aligned with said upstanding partition portions to define partitions which together with walls of said case form case compartments for said cells;

e. said partitions having apertures therethrough for vapor communication among cells in respective case compartments;

f. upper portions of said plates being spaced from said cover to define space for vapor residence;

g. at least one catalyst unit connected to said case and communicating with said vapor residence space for enhancing recombination of hydrogen and oxygen, said at least one catalyst unit being of number less than said plurality of cells.