Lead-acid battery

Patent metadata

Field	Value
Publication number	US-11658347-B2
Application number	US-202017614886-A
Country	US
Kind code	B2
Filing date	May 29, 2020
Priority date	May 31, 2019
Publication date	May 23, 2023
Grant date	May 23, 2023

Abstract

A lead-acid battery includes a positive electrode plate, a negative electrode plate, and an electrolyte solution, in which 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 Sn in an amount of 0.95% by mass or more, the negative electrode material contains a polymer compound, and the polymer compound has a peak in a range of 3.2 ppm or more and 3.8 ppm or less in a chemical shift of 1 H-NMR spectrum, or the polymer compound contains a repeating structure of oxy C 2-4 alkylene units.

First claim

The invention claimed is:

1. A lead-acid battery comprising a positive electrode plate, a negative electrode plate, an electrolyte solution, and a polymer compound,
wherein the positive electrode plate comprises a positive current collector and a positive electrode material,
the negative electrode plate comprises a negative current collector and a negative electrode material, wherein at least the negative electrode material contains the polymer compound,
the positive current collector contains Sn in an amount of 0.95% by mass or more, and
the polymer compound has a peak in a range of 3.2 ppm or more and 3.8 ppm or less in a chemical shift of 1 H-NMR spectrum and the polymer compound contains a repeating structure of oxy C 2-4 alkylene units.

2. The lead-acid battery according to claim 1 , wherein an Sn content of the positive current collector is less than 3% by mass.

3. The lead-acid battery according to claim 1 or 2 , wherein the positive current collector further contains Ca.

4. The lead-acid battery according to claim 1 ,
a content of the polymer compound in the negative electrode material is 5 to 500 ppm in mass ratio.

5. The lead-acid battery according to claim 1 , wherein a number average molecular weight of the polymer compound is 500 or more.

6. A lead-acid battery comprising a positive electrode plate, a negative electrode plate, an electrolyte solution, and a polymer compound,
wherein the positive electrode plate comprises a positive current collector and a positive electrode material,
the negative electrode plate comprises a negative current collector and a negative electrode material, wherein at least the negative electrode material contains the polymer compound,
the positive current collector contains Sn in an amount of 0.95% by mass or more, and
the polymer compound contains a repeating structure of oxy C 2-4 alkylene units.

7. The lead-acid battery according to claim 6 , wherein an Sn content of the positive current collector is less than 3% by mass.

8. The lead-acid battery according to claim 6 or 7 , wherein the positive current collector further contains Ca.

9. The lead-acid battery according to claim 6 ,
a content of the polymer compound in the negative electrode material is 5 to 500 ppm in mass ratio.

10. The lead-acid battery according to claim 6 , wherein a number average molecular weight of the polymer compound is 500 or more.

Assignees

• Gs Yuasa Int Ltd

Inventors

• Hamano Yasuyuki
• Kagohashi Hiroki

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M4/14

  Electrodes for lead-acid accumulators · CPC title

• H01M4/662

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

• H01M4/68

  for use in lead-acid accumulators · CPC title

• H01M10/06 Primary

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