# US 10,014,520 B2 · Composition that enhances deep cycle performance of valve-regulated lead-acid batteries filled with gel electrolyte

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- Number: US 10,014,520 B2
- Document ID: US10014520B2
- Status: Granted
- Kind: B2
- Application number: 13/664,726
- Filed: 2012-10-31
- Published: 2014-05-01
- Granted: 2018-07-03
- Earliest claimed: 2012-10-31
- Assignees: Exide Technologies
- Applicants: Exide Technologies GmbH
- Inventors: Satoru Yaegashi; Harald Niepraschk; Olaf Sielemann
- Web page: https://patentgrep.com/patent/US10014520B2

## CPC

- H01M 4/14: Electrodes for lead-acid accumulators
- H01M 4/625: {Carbon or graphite}
- H01M 10/121: {Valve regulated lead acid batteries [VRLA]}
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- H01M 2004/027: {Negative electrodes}
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- 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

## Abstract

Disclosed herein is a composition for use in a negative active material in a valve regulated lead-acid battery, including a carbon material having a BET surface area from 150 m2/g to 2000 m2/g and having a D90-value greater than 5 μm with the amount of carbon material ranging from 0.1 wt % to 1.5 wt % based on the total weight of the composition. Also disclosed herein is a valve regulated lead-acid battery, including a positive plate, a negative plate, a separator, and an electrolyte disposed in a container with a valve, the negative plate including a substrate of lead or a lead alloy and a negative active material of a composition including a carbon material having a BET surface area from 150 m2/g to 2000 m2/g and having a D90-value greater than 5 μm, the amount of carbon material ranging from 0.1 wt % to 1.5 wt % based on the total weight of the composition.

## Claims

### Claim 1

A composition for use in a negative active material in a valve regulated lead-acid battery, comprising:
a carbon material having a BET surface area from 150 m2/g to 2000 m2/g and having a D90-value greater than 5 μm;
wherein the amount of carbon material ranges from 0.1 wt % to 1.5 wt % based on the total weight of the composition.

### Claim 2 (depends on 1)

The composition of claim 1, wherein the carbon material comprises an activated carbon, an amorphous carbon, a carbon black, a graphite, a carbon fiber, or a combination thereof.

### Claim 3 (depends on 1)

The composition of claim 1, wherein the carbon material comprises an activated carbon, a graphite, a carbon fiber, or a combination thereof.

### Claim 4 (depends on 1)

The composition of claim 1, wherein the BET surface area ranges from 150 m2/g to 1500 m2/g.

### Claim 5 (depends on 1)

The composition of claim 1, wherein the BET surface area ranges from 200 m2/g to 1500 m2/g.

### Claim 6 (depends on 1)

The composition of claim 1, wherein the D90-value ranges from 5 μm to 2000 μm.

### Claim 7 (depends on 1)

The composition of claim 1, wherein the D90-value ranges from 5 μm to 100 μm.

### Claim 8 (depends on 1)

The composition of claim 1, wherein the D90-value ranges from 5 μm to 50 μm.

### Claim 9 (depends on 1)

The composition of claim 1, wherein the amount of carbon material ranges from 0.1 wt % to 1.2 wt % based on the total weight of the composition.

### Claim 10 (depends on 1)

The composition of claim 1, wherein the amount of carbon material ranges from 0.2 wt % to 1.0 wt % based on the total weight of the composition.

### Claim 11

A valve regulated lead-acid battery, comprising:
a positive plate, a negative plate, a separator, and an electrolyte disposed in a container comprising a valve,
wherein the negative plate comprises
a substrate comprising lead or a lead alloy and
a negative active material comprised of a composition comprising a carbon material having a BET surface area from 150 m2/g to 2000 m2/g and having a D90-value greater than 5 μm;
wherein the amount of carbon material ranges from 0.1 wt % to 1.5 wt % based on the total weight of the composition.

### Claim 12 (depends on 11)

The battery of claim 11, wherein the carbon material comprises an activated carbon, an amorphous carbon, a carbon black, a graphite, a carbon fiber, or a combination thereof.

### Claim 13 (depends on 11)

The battery of claim 11, wherein the carbon material comprises an activated carbon, a graphite, a carbon fiber, or a combination thereof.

### Claim 14 (depends on 11)

The battery of claim 11, wherein the BET surface area ranges from 150 m2/g to 1500 m2/g.

### Claim 15 (depends on 11)

The battery of claim 11, wherein the BET surface area ranges from 200 m2/g to 1500 m2/g.

### Claim 16 (depends on 11)

The battery of claim 11, wherein the D90-value ranges from 5 μm to 2000 μm.

### Claim 17 (depends on 11)

The battery of claim 11, wherein the D90-value ranges from 5 μm to 100 μm.

### Claim 18 (depends on 11)

The battery of claim 11, wherein the D90-value ranges from 5 μm to 50 μm.

### Claim 19 (depends on 11)

The battery of claim 11, wherein the amount of carbon material ranges from 0.1 wt % to 1.2 wt % based on the total weight of the composition.

### Claim 20 (depends on 11)

The battery of claim 11, wherein the amount of carbon material ranges from 0.2 wt % to 1.0 wt % based on the total weight of the composition.