Lead-acid battery

Patent metadata

Field	Value
Publication number	US-11894560-B2
Application number	US-202017763540-A
Country	US
Kind code	B2
Filing date	Sep 24, 2020
Priority date	Sep 27, 2019
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

A lead-acid battery includes a positive electrode plate, a negative electrode plate, and an electrolyte solution. The positive electrode plate includes a positive current collector and a positive electrode material. The negative electrode plate includes a negative current collector and a negative electrode material. The positive current collector contains a lead alloy containing Ca and Sn. The content of Ca in the positive current collector is 0.2% by mass or less, and the content of Sn is 0.5% by mass or more. The negative electrode material contains a first organic expander (excluding a lignin compound) containing at least one selected from the group consisting of a unit of a monocyclic aromatic compound and a unit of a bisphenol S compound.

First claim

The invention claimed is:

1. A lead-acid battery comprising a positive electrode plate, a negative electrode plate, and an electrolyte solution,
wherein the positive electrode plate includes a positive current collector and a positive electrode material,
the negative electrode plate includes a negative current collector and a negative electrode material,
the positive current collector contains a lead alloy containing Ca and Sn,
a content of Ca in the positive current collector is 0.2% by mass or less, and a content of Sn is 0.5% by mass or more, and
the negative electrode material contains a first organic expander (excluding a lignin compound) containing at least one selected from the group consisting of a unit of a monocyclic aromatic compound and a unit of a bisphenol S compound.

2. The lead-acid battery according to claim 1 , wherein a content of Ca in the positive current collector is 0.14% by mass or less.

3. The lead-acid battery according to claim 1 , wherein a content of Ca in the positive current collector is 0.12% by mass or less.

4. The lead-acid battery according to claim 1 , wherein a content of Sn in the positive current collector is 0.8% by mass or more.

5. The lead-acid battery according to claim 1 , wherein a content of Sn in the positive current collector is 1.0% by mass or more.

6. The lead-acid battery according to claim 1 , wherein the negative electrode material further contains barium sulfate.

7. The lead-acid battery according to claim 6 , wherein a content of the barium sulfate in the negative electrode material is 0.6% by mass or more.

8. The lead-acid battery according to claim 1 , wherein the first organic expander contains the unit of a monocyclic aromatic compound, and the unit of a monocyclic aromatic compound contains at least a unit of phenolsulfonic acid.

9. The lead-acid battery according to claim 1 , wherein the first organic expander contains the unit of a monocyclic aromatic compound and a unit of a bisarene compound, and the unit of a bisarene compound is at least one selected from the group consisting of a unit of a bisphenol S compound and a unit of a bisphenol A compound.

10. The lead-acid battery according to claim 9 , wherein the unit of a bisarene compound includes at least the unit of a bisphenol S compound.

11. The lead-acid battery according to claim 1 , wherein the first organic expander contains the unit of a bisphenol S compound and a unit of a bisphenol A compound.

12. The lead-acid battery according to claim 11 , wherein in the first organic expander, a molar rate of the unit of a bisphenol S compound to a total amount of the unit of a bisphenol S compound and the unit of a bisphenol A compound is 40 mol % or more.

13. The lead-acid battery according to claim 1 , wherein a content of Ca in the positive current collector is 0.01% by mass or more.

14. The lead-acid battery according to claim 1 , wherein a content of Sn in the positive current collector is 5% by mass or less.

15. The lead-acid battery according to claim 6 , wherein a content of the barium sulfate in the negative electrode material is 0.05% by mass or more and 5% by mass or less.

16. The lead-acid battery according to claim 1 , wherein the first organic expander includes a first unit that is a unit of a monocyclic aromatic compound and a second unit that is a unit of another aromatic compound.

17. The lead-acid battery according to claim 16 , wherein a molar rate of the first unit to a total amount of the first unit and the second unit is 10 mol % or more and 90 mol % or less.

18. The lead-acid battery according to claim 11 , wherein a molar rate of the unit of a bisphenol S compound to a total amount of the unit of a bisphenol S compound and the unit of a bisphenol A compound is 10 mol % or more and 90 mol % or less.

19. The lead-acid battery according to claim 1 , wherein the first organic expander has a sulfur element content of 300 μmol/g or more and 8000 μmol/g or less.

20. The lead-acid battery according to claim 1 , wherein the first organic expander has a sulfur element content of 300 μmol/g or more and less than 2000 μmol/g.

21. The lead-acid battery according to claim 1 , wherein the organic expander has a weight average molecular weight (Mw) of 7000 or more and 20,000 or less.

22. The lead-acid battery according to claim 1 , wherein the negative electrode material further contains a carbonaceous material.

23. The lead-acid battery according to claim 22 , wherein a content of the carbonaceous material in the negative electrode material is 0.05% by mass or more and 5% by mass or less.

Assignees

• Gs Yuasa Int Ltd

Inventors

• Mizoguchi Yasunori
• Tsujinaka Akihito

Classifications

• H01M4/662 Primary

  Alloys (collectors of lead alloys H01M4/685) · CPC title

• C22C11/06 Primary

  with tin as the next major constituent · CPC title

• H01M10/06

  Lead-acid accumulators (semi-lead accumulators H01M10/20) · CPC title

• H01M4/14 Primary

  Electrodes for lead-acid accumulators · CPC title

• H01M4/685

  Lead alloys · CPC title