Electrode plate with a rounded corner and edge for storage battery

• US 6,641,956 B1
• Filed: 08/01/2000
• Issued: 11/04/2003
• Est. Priority Date: 08/05/1999
• Status: Expired due to Fees

• Current Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company), Sanoh Kogyo Kabushiki Kaisha
• Original Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company), Sanoh Kogyo Kabushiki Kaisha
• Inventors: Suzuki, Hiroyuki, Takayasu, Hiroyuki, Ariga, Kyoichi
• Primary Examiner(s): Ruthkosky, Mark
• Application Number:
  US09/630,168
• Time in Patent Office: 1,190 Days
• Field of Search: 429/211, 429/233, 429/236, 429/237, 429/241, 429/242
• US Class Current: 429/236
• CPC Class Codes: H01M 10/0431 Cells with wound or folded electrodes H01M10/045 takes precedence
• CPC Class Codes: H01M 10/345 Gastight metal hydride accumulators
• CPC Class Codes: H01M 4/70 characterised by shape or form
• 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

An electrode plate of a storage battery includes a rectangular, conducting, porous base plate 12 and a paste 13 containing an active substance, spread over the surfaces of the base plate 12, and filled in the hollow spaces in the base plate by rolling so as to form layers attached to the surfaces of the base plate 12. When shaping the base plate 12, the corners C of the base plate 12 are rounded, and the edge of at least one of the sides S of the base plate 11 is rounded in cross section. Thus, burrs at the corners C and along the sides S are removed so that the exertion of excessive contact pressure on the corners C and the sides S of the base plate is prevented in the assembled state of the storage battery, whereby the occurrence of short circuit is also prevented.

Claims

1. In a wound electrode plate for a battery, the improvements comprising:

a rectangular, conducting, base plate having hollow spaces and first, second, third and fourth sides; and

a paste containing an active substance, spread over surfaces of the base plate and filled in the hollow spaces in the base plate so as to form layers covering the surfaces of the base plate,

wherein at least one of corners of the base plate is rounded, and at least one of the sides of the base plate has an edge rounded in cross section, and

wherein the at least one of corners and the at least one of sides of the base plate are entirely at one of a starting and an ending portion of the wound electrode plate.

2. The electrode plate according to claim 1, wherein the first and second sides are longer than the third and fourth sides of the base plate, and further comprising a collector tab attached to and along an edge of the first side of the base plate.

3. The electrode plate according to claim 2, wherein the edge of the second side is not rounded in cross section.

4. The electrode plate according to claim 1, wherein the base plate is cut from a plate larger than the base plate and in which the hollow spaces are already formed.

5. The electrode plate according to claim 2, wherein the base plate is a foam metal plate.

6. The electrode plate according to claim 3, wherein the base plate is a foam metal plate.

7. The electrode plate according to claim 4, wherein the base plate is a foam metal plate.

8. The electrode plate according to claim 2, wherein:

the second side of the base plate is opposite to the collector tab and has the edge rounded in cross section; and

four corners of the base plate are rounded.

9. The electrode plate according to claim 3, wherein:

four corners of the base plate are rounded.

10. The electrode plate according to claim 6, wherein:

the second side of the base plate is opposite to the collector tab and has the edge rounded in cross section; and

four corners of the base plate are rounded.

11. The electrode plate according to claim 7, wherein:

four corners of the base plate are rounded.

12. The electrode plate according to claim 1, wherein the at least one of the corners of the base plate is rounded in an arc, and the edge rounded in cross section projects outward of the base plate.

13. The electrode plate according to claim 2, wherein the at least one of the corners of the base plate is rounded in an arc, and the edge rounded in cross section projects outward of the base plate.

14. The electrode plate according to claim 3, wherein the at least one of the corners of the base plate is rounded in an arc, and the edge rounded in cross section projects outward of the base plate.

15. The electrode plate according to claim 5, wherein the at least one of the corners of the base plate is rounded in an arc, and the edge rounded in cross section projects outward of the base plate.

16. The electrode plate according to claim 6, wherein the at least one of the corners of the base plate is rounded in an arc, and the edge rounded in cross section projects outward of the base plate.

17. The electrode plate according to claim 7, wherein the at least one of the corners of the base plate is rounded in an arc, and the edge rounded in cross section projects outward of the base plate.

18. The electrode plate according to claim 8, wherein the at least one of the corners of the base plate is rounded in an arc, and the edge rounded in cross section projects outward of the base plate.

19. The electrode plate according to claim 11, wherein the at least one of the corners of the base plate is rounded in an arc, and the edge rounded in cross section projects outward of the base plate.

20. The electrode plate according to claim 1, wherein the edge rounded in cross section is rounded by a crushing method using a roll.