Back to results
US 9,425,451 B2Granted
Separator of lithium battery and manufacturing method thereof
AssigneeBenQ Materials Corporation
InventorsWei-Ting Yeh, Kang-Ming Peng
Life of this patent
Estimating the term…
Abstract
The present disclosure provides a separator for lithium battery, particularly to a separator including a middle layer formed by a punch method. Also, a manufacturing method of the separator is provided. The separator formed by the punch method has a better heat-resistant property in an elevated temperature and features a high mechanical strength.
Claims5
A method for manufacturing a separator for lithium battery, comprising:
- providing a polymer film having two surfaces, each of the surfaces having a release film;
- punching the polymer film by a mechanical punching machine or a laser punching machine to form a microporous structure in the polymer film;
- removing the two release films from the two surfaces of the polymer film;
- respectively providing a first polyolefin film and a second polyolefin film both having microporous structure on each of the two surfaces of the polymer film;
- and
- thermally pressing and bonding the first polyolefin film and the second polyolefin film to the two surfaces of the polymer film, respectively.
3 more elements
Dependencies are inferred from the claim text.