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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10224550 B1

PDFFull Text
Date of Patent:
Mar. 05, 2019

Filed:

May. 16, 2014

Advanced graphite additive for enhanced cycle-life of lead-acid batteries

Applicant:

Exide Technologies, Milton, GA (US);

Inventors:

Sudhakar Jagannathan, Alpharetta, GA (US);

Melchor Fernandez Garcia, Alcala de Henares Madrid, ES;

Assignee:

EXIDE TECHNOLOGIES, Milton, GA (US);

Attorney:

Cantor Colburn LLP

Primary Examiner:

Helen Oi K Conley

Int. Cl.
CPC ...
H01M 4/62 (2006.01); H01B 1/04 (2006.01); H01M 4/20 (2006.01); H01M 10/12 (2006.01); H01M 4/14 (2006.01); H01M 10/613 (2014.01); H01M 10/625 (2014.01); H01B 1/12 (2006.01); H01M 2/16 (2006.01); H01M 4/38 (2006.01); H01M 4/56 (2006.01); H01M 10/08 (2006.01); H01M 10/06 (2006.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/625 (2013.01); H01B 1/04 (2013.01); H01B 1/122 (2013.01); H01M 2/1613 (2013.01); H01M 4/14 (2013.01); H01M 4/20 (2013.01); H01M 4/38 (2013.01); H01M 4/56 (2013.01); H01M 4/627 (2013.01); H01M 10/06 (2013.01); H01M 10/08 (2013.01); H01M 10/12 (2013.01); H01M 10/121 (2013.01); H01M 10/613 (2015.04); H01M 10/625 (2015.04); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01); H01M 2220/20 (2013.01); Y02E 60/126 (2013.01); Y10T 29/49108 (2015.01); Y10T 29/49115 (2015.01);
Abstract

An Advanced Graphite, with a lower degree of ordered carbon domains and a surface area greater than ten times that of typical battery grade graphites, is used in negative active material (NAM) of valve-regulated lead-acid (VRLA) type Spiral wound 6V/25 Ah lead-acid batteries. A significant and unexpected cycle life was achieved for the Advanced Graphite mix, where the battery was able to cycle beyond 145,000 cycles above the failure voltage of 9V, in a non-stop, power-assist, cycle-life test. Batteries with Advanced Graphite also showed increased charge acceptance power and discharge power compared to control groups.

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