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:
May. 31, 2022
Filed:
Nov. 08, 2018
Applicant:
Hitachi Chemical Company, Ltd., Tokyo, JP;
Inventors:
Assignee:
HITACHI CHEMICAL COMPANY, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 50/446 (2021.01); H01M 50/449 (2021.01); H01M 10/06 (2006.01); H01M 50/437 (2021.01); H01M 50/491 (2021.01); H01M 50/44 (2021.01);
U.S. Cl.
CPC ...
H01M 50/446 (2021.01); H01M 10/06 (2013.01); H01M 50/44 (2021.01); H01M 50/449 (2021.01); H01M 50/491 (2021.01); H01M 50/437 (2021.01); H01M 2220/20 (2013.01);
Abstract
A separatoris disposed between a positive electrode and a negative electrode in a lead acid storage battery including the positive electrode and the negative electrode, in which the separatorcontains a glass fiber and an organic binder, the separatorincludes a first layerthat is in contact with the positive electrode, and a second layerthat is in contact with the negative electrode, an average pore diameter of the first layeris larger than an average pore diameter of the second layer, and a thickness of the first layeris equal to or less than the half of the overall thickness of the separator