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.:
Date of Patent:
Feb. 14, 2017
Filed:
Oct. 18, 2005
Zhengming Zhang, Charlotte, NC (US);
Khuy V. Nguyen, Charlotte, NC (US);
Pankaj Arora, Chesterfield, VA (US);
Ronald W. Call, Rock Hill, SC (US);
Donald K. Simmons, Fayetteville, GA (US);
Tien Dao, Bensalem, PA (US);
Zhengming Zhang, Charlotte, NC (US);
Khuy V. Nguyen, Charlotte, NC (US);
Pankaj Arora, Chesterfield, VA (US);
Ronald W. Call, Rock Hill, SC (US);
Donald K. Simmons, Fayetteville, GA (US);
Tien Dao, Bensalem, PA (US);
Celgard LLC, Charlotte, NC (US);
Abstract
A battery separator is a microporous membrane. The membrane has a major volume of a thermoplastic polymer and a minor volume of an inert particulate filler. The filler is dispersed throughout the polymer. The membrane exhibits a maximum Z-direction compression of 95% of the original membrane thickness. Alternatively, the battery separator is a microporous membrane having a TMA compression curve with a first substantially horizontal slope between ambient temperature and 125° C., a second substantially horizontal slope at greater than 225° C. The curve of the first slope has a lower % compression than the curve of the second slope. The curve of the second slope is not less than 5% compression. The TMA compression curve is graphed so that the Y-axis represents % compression from original thickness and the X-axis represents temperature.