Lead-acid battery

Patent metadata

Field	Value
Publication number	US-10790501-B2
Application number	US-201415312508-A
Country	US
Kind code	B2
Filing date	Dec 19, 2014
Priority date	May 26, 2014
Publication date	Sep 29, 2020
Grant date	Sep 29, 2020

Abstract

A negative electrode material contains an organic anti-shrink agent which is soluble in water, and the organic anti-shrink agent, when extracted from the negative electrode material with an alkali aqueous solution, has an average particle size of not less than 0.1 μm and not more than 9 μm in sulfuric acid having a specific gravity of 1.25. A lead-acid battery includes a negative electrode plate containing an organic anti-shrink agent having a S element content of 4000 μmol/g or more. The negative electrode contains 0.3 mg/cm3 or more of the S element in the organic anti-shrink agent.

First claim

The invention claimed is:

1. A lead-acid battery comprising:
a negative electrode material,
wherein the negative electrode material contains an organic anti-shrink agent, and
the organic anti-shrink agent is soluble in water under a neutral or basic condition, and has an average particle size of not less than 0.1 μm and not more than 9 μm when measured in sulfuric acid having a specific gravity of 1.25 at 25° C.

2. The lead-acid battery according to claim 1 , wherein the average particle size of the organic anti-shrink agent when measured in sulfuric acid having a specific gravity of 1.25 at 25° C. is not less than 0.4 μm and not more than 9 μm.

3. The lead-acid battery according to claim 1 , wherein the average particle size of the organic anti-shrink agent when measured in sulfuric acid having a specific gravity of 1.25 at 25° C. is not less than 0.4 μm and not more than 8 μm.

4. The lead-acid battery according to claim 1 , wherein the negative electrode material contains lignosulfonic acid hydrolyzed in sulfuric acid.

5. A method for producing the lead-acid battery according to claim 4 , wherein the lignosulfonic acid is hydrolyzed in sulfuric acid, and then included in the negative electrode material.

6. The lead-acid battery according to claim 1 , wherein the median of the pore size of the negative electrode material is not less than 0.3 μm and not more than 8.0 μm.

7. A lead-acid battery comprising:
a negative electrode plate;
a positive electrode plate; and
an electrolyte solution,
wherein the negative electrode plate includes a negative electrode material,
the negative electrode material contains an organic anti-shrink agent, the negative electrode material contains a sulfur element (S element) in the organic anti-shrink agent,
the organic anti-shrink agent contains the sulfur element (S element) in an amount of 0.3 mg or more per unit volume (1 cm 3 ) of the negative electrode material, and
the content of the sulfur element (S element) in the organic anti-shrink agent is not less than 4500 μmol/g and not more than 6000 μmol/g.

8. The lead-acid battery according to claim 7 , wherein the organic anti-shrink agent contains the sulfur element (S element) in an amount of 0.4 mg or more per unit volume (1 cm 3 ) of the negative electrode material.

9. The lead-acid battery according to claim 7 , wherein the organic anti-shrink agent is a synthetic organic anti-shrink agent.

10. The lead-acid battery according to claim 7 , wherein the organic anti-shrink agent contains a S element of at least one of a sulfonic acid group and a sulfonyl group.

11. The lead-acid battery according to claim 7 , wherein the organic anti-shrink agent is a bisphenol condensation product containing a sulfur element (S element).

12. The lead-acid battery according to claim 7 , wherein the median of the pore size of the negative electrode material is not less than 0.3 μm and not more than 8.0 μm.

13. The lead-acid battery according to claim 12 , wherein the median of the pore size of the negative electrode material is not less than 0.6 μm and not more than 8.0 μm.

14. The lead-acid battery according to claim 12 , wherein the median of the pore size of the negative electrode material is not less than 0.6 μm and not more than 7.5 μm.

15. A lead-acid battery comprising:
a negative electrode plate;
a positive electrode plate; and
an electrolyte solution,
wherein the negative electrode plate includes a negative electrode material,
the negative electrode material contains an organic anti-shrink agent, the negative electrode material contains a sulfur element (S element) in the organic anti-shrink agent,
the organic anti-shrink agent contains the sulfur element (S element) in an amount of 0.3 mg or more per unit volume (1 cm 3 ) of the negative electrode material,
the organic anti-shrink agent is a condensation product of a bisphenol containing a sulfur element (S element), the bisphenol including bisphenol A, S or F, and
the content of the sulfur element (S element) in the organic anti-shrink agent is not less than 4500 μmol/g and not more than 6000 μmol/g.

Assignees

• Gs Yuasa Int Ltd

Inventors

• Hamano Yasuyuki
• Motoi Ikumi

Classifications

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• H01M4/627

  Expanders for lead-acid accumulators · CPC title

• H01M4/14 Primary

  Electrodes for lead-acid accumulators · CPC title

• H01M10/06

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

• Y02E60/10

  Energy storage using batteries · CPC title