# US 2013/0280595 A1 · Lead-acid battery

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- Number: US 2013/0280595 A1
- Document ID: US20130280595A1
- Status: Published application
- Kind: A1
- Application number: 13/996,680
- Filed: 2010-12-21
- Published: 2013-10-24
- Earliest claimed: 2010-12-21
- Assignees: Shin-Kobe Electric Machinery Co., Ltd.
- Inventors: Koji Kogure; Masatoshi Toduka
- Web page: https://patentgrep.com/patent/US20130280595A1

## CPC

- H01M 10/06: Lead-acid accumulators (semi-lead accumulators H01M10/20)
- H01M 4/0416: {involving impregnation with a solution, dispersion, paste or dry powder (H01M4/0438 takes precedence)}
- H01M 4/20: of pasted electrodes
- H01M 4/56: of lead
- H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M 4/628: {Inhibitors, e.g. gassing inhibitors, corrosion inhibitors}
- H01M 4/685: {Lead alloys}
- H01M 10/4235: {Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence)}
- H01M 50/417: Polyolefins
- H01M 50/437: Glass
- H01M 50/44: Fibrous material
- H01M 10/14: Assembling a group of electrodes or separators
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A lead-acid battery improving the charge acceptance in an initial stage, suppressing the decrease of the charge acceptance for a long time use of the battery and having a long life is provided. In a lead-acid battery using a paste type negative plate prepared by filling a past form negative active material using a lead powder as a starting material in a collector made of a lead alloy, a flake graphite and a condensate of bisphenols and aminobenzene sulfonic acid are contained in the negative active material. The average primary particle diameter of the flake graphite is 10 μm or more and 220 μm or less, preferably, 100 μm or more and 220 μm or less. The content of the flake graphite is preferably from 0.5 mass parts to 2.7 mass parts and, more preferably, from 1.1 mass parts to 2.2 mass parts based on 100 mass parts of the negative active material (spongy metallic lead) in a fully charged state.

## Claims

### Claim 1

A lead-acid battery having a configuration in which a group of plates formed by stacking negative plates where a negative active material is filled in a negative collector and positive plates where a positive active material is filled in a positive collector by way of a separator is contained together with an electrolyte in a container, wherein
the negative active material contains a flake graphite and a condensate of bisphenols and aminobenzene sulfonic acid in the negative active material, and the average primary particle diameter of the flake graphite is 100 μM or more and 220 μm or less.

### Claim 2

(canceled)

### Claim 3 (depends on 1)

The lead-acid battery according to claim 1, wherein the content of the flake graphite in the negative active material is from 0.5 mass % to 2.7 mass % of the flake graphite based on 100 mass parts of the negative active material (spongy metallic lead) in a fully charged state.

### Claim 4 (depends on 1)

The lead-acid battery according to claim 1, wherein the content of the flake graphite in the negative active material is from 1.1 mass % to 2.2 mass % of the flake graphite based on 100 mass parts of the negative active material (spongy metallic lead) in a fully charged state.

### Claim 5 (depends on 1)

The lead-acid battery according to claim 1, wherein the condensate of the bisphenols and aminobenzene sulfonic acid is a formaldehyde condensate of bisphenol A and sodium aminobenzene sulfonate represented by the following chemical structural formula [chem. 1].
R1 and R2 represent each hydrogen or
(excluding a case where both R1 and R2 are hydrogen)

### Claim 6 (depends on 1)

The lead-acid battery according to claim 1, wherein the separator is formed of a non-woven fabric comprising at least one fiber material selected from the group of materials consisting of glass, pulp, and polyolefin.

### Claim 7 (depends on 1)

The lead-acid battery according to claim 1, wherein the surface of the separator opposed to the surface of the negative plate is formed of a non-woven fabric comprising at least one fiber material selected from the group of materials consisting of glass, pulp and polyolefin, and the surface thereof opposed to the surface of the positive plate is formed of a finely porous polyethylene sheet.

### Claim 8

A lead-acid battery having a configuration in which a group of plates formed by stacking negative plates where a negative active material is filled in a negative collector and positive plates where a positive active material is filled in a positive collector by way of a separator is contained together with an electrolyte in a container, wherein
the negative active material contains a flake graphite and a condensate of bisphenols and aminobenzene sulfonic acid in the negative active material,
the average primary particle diameter of the flake graphite is 100 μM or more and 220 μm or less, and
the content of the flake graphite in the negative active material is from 0.5 mass % to 2.2 mass % of the flake graphite based on 100 mass parts of the negative active material (spongy metallic lead) in a fully charged state.

### Claim 9 (depends on 8)

The lead-acid battery according to claim 8, wherein the condensate of the bisphenols and aminobenzene sulfonic acid is a formaldehyde condensate of bisphenol A and sodium aminobenzene sulfonate represented by the following chemical structural formula [chem. 2].
[Chem. 2]
R1 and R2 represent each hydrogen or
(excluding a case where both R1 and R2 are hydrogen)

### Claim 10 (depends on 9)

The lead-acid battery according to claim 9, wherein the surface of the separator opposed to the surface of the negative plate is formed of a non-woven fabric comprising at least one fiber material selected from the group of materials consisting of glass, pulp, and polyolefin.