Lead-acid battery

Patent metadata

Field	Value
Publication number	US-10084208-B2
Application number	US-201514957167-A
Country	US
Kind code	B2
Filing date	Dec 2, 2015
Priority date	Dec 18, 2014
Publication date	Sep 25, 2018
Grant date	Sep 25, 2018

Abstract

A lead-acid battery, including: a positive electrode plate; a negative electrode plate; an electrolyte solution; and a container having a cell chamber in which the positive electrode plate, the negative electrode plate and the electrolyte solution are accommodated. A concentration of Ba sulfate contained in a negative electrode material of the negative electrode plate is 1.0 mass % or more, and a Na concentration in the electrolyte solution is 0.04 mol/L or less.

First claim

What is claimed is:

1. A lead-acid battery, comprising:
a positive electrode plate;
a negative electrode plate;
an electrolyte solution; and
a container having a cell chamber in which the positive electrode plate, the negative electrode plate and the electrolyte solution are accommodated,
wherein a concentration of Ba sulfate contained in a negative electrode material of the negative electrode plate is 1.0 mass % or more,
a Na concentration in the electrolyte solution is 0.005 mol/L or more and 0.04 mol/L or less, and
when a total mass of the negative electrode plate per cell is expressed as NP (g), and a volume defined by a height of the negative electrode plate×a width of the negative electrode plate×an inside dimension of the cell chamber in a direction perpendicular to the negative electrode plate is expressed as V (cm 3 ), NP/V is 1.3 g/cm 3 or more.

2. A lead-acid battery, comprising:
a positive electrode plate;
a negative electrode plate;
an electrolyte solution; and
a container having a cell chamber in which the positive electrode plate, the negative electrode plate and the electrolyte solution are accommodated,
wherein a concentration of Ba contained in a negative electrode material of the negative electrode plate is 0.6 mass % or more,
a Na concentration in the electrolyte solution is 0.005 mol/L or more and 0.04 mol/L or less, and
when a total mass of the negative electrode plate per cell is expressed as NP (g), and a volume defined by a height of the negative electrode plate×a width of the negative electrode plate×an inside dimension of the cell chamber in a direction perpendicular to the negative electrode plate is expressed as V (cm 3 ), NP/V is 1.3 g/cm 3 or more.

3. The lead-acid battery according to claim 1 , wherein the concentration of Ba sulfate contained in the negative electrode material is 1.2 mass % or more.

4. The lead-acid battery according to claim 2 , wherein the concentration of Ba contained in the negative electrode material is 0.7 mass % or more.

5. A lead-acid battery, comprising:
a positive electrode plate;
a negative electrode plate;
an electrolyte solution; and
a container having a cell chamber in which the positive electrode plate, the negative electrode plate and the electrolyte solution are accommodated,
wherein a concentration of Ba sulfate contained in a negative electrode material of the negative electrode plate is 1.0 mass % or more,
a Na concentration in the electrolyte solution is 0.005 mol/L or more and 0.04 mol/L or less, and
when a total mass of the negative electrode plate per cell is expressed as NP (g), and a volume defined by a height of the negative electrode plate×a width of the negative electrode plate×an inside dimension of the cell chamber in a direction perpendicular to the negative electrode plate is expressed as V (cm 3 ), NP/V is 1.6 g/cm 3 or less.

6. The lead-acid battery according to claim 1 , wherein a density of a positive electrode material of the positive electrode plate is 3.8 g/cm 3 or more.

7. The lead-acid battery according to claim 1 , wherein the negative electrode material contains graphite.

8. The lead-acid battery according to claim 1 , wherein the negative electrode material contains graphite in an amount of 0.5 mass % or more.

9. The lead-acid battery according to claim 1 , wherein the electrolyte solution contains Al.

10. The lead-acid battery according to claim 1 , wherein the electrolyte solution contains Al in an amount of 0.02 mol/L or more.

11. The lead-acid battery according to claim 1 , wherein the electrolyte solution contains Li.

12. The lead-acid battery according to claim 1 , wherein the electrolyte solution contains Li in an amount of 0.02 mol/L or more.

13. The lead-acid battery according to claim 1 , wherein the negative electrode material contains flake graphite.

14. The lead-acid battery according to claim 1 , wherein the lead-acid battery is a lead-acid battery for an idling-stop vehicle.

15. The lead-acid battery according to claim 1 , wherein the lead-acid battery is a flooded type lead-acid battery.

16. The lead-acid battery according to claim 1 , wherein the negative electrode plate comprises a Pb—Ca—Sn alloy grid.

17. The lead-acid battery according to claim 2 , wherein the negative electrode plate comprises a Pb—Ca—Sn alloy grid.

Assignees

• Gs Yuasa Int Ltd

Inventors

• Kyo Masaaki

Classifications

• H01M4/14 Primary

  Electrodes for lead-acid accumulators · CPC title

• H01M10/08 Primary

  Selection of materials as electrolytes · CPC title

• H01M10/06

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

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M4/583

  Carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title