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. 20, 2014
Filed:
Mar. 30, 2011
Applicants:
Shinya Kagei, Takehara, JP;
Keisuke Miyanohara, Takehara, JP;
Yoshimi Hata, Takehara, JP;
Yasuhiro Ochi, Takehara, JP;
Inventors:
Shinya Kagei, Takehara, JP;
Keisuke Miyanohara, Takehara, JP;
Yoshimi Hata, Takehara, JP;
Yasuhiro Ochi, Takehara, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 4/505 (2010.01);
U.S. Cl.
CPC ...
Abstract
Provided is a lithium ion battery wherein the content of an iron element contained in a positive electrode active material (measured with an ICP emission spectrophotometer) is 10 ppm or more, and magnetic materials having a size of 0.70 times or greater than the thickness of a separator layer are substantially not included in order to provide a lithium ion battery which has small voltage drop during a charge state or under storage at high temperatures.