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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 9306214 B1

PDFFull Text
Date of Patent:
Apr. 05, 2016

Filed:

Feb. 19, 2013

Lithium ion battery

Applicant:

Hitachi Chemical Company, Ltd., Chiyoda-ku, Tokyo, JP;

Inventors:

Hiroo Nishiyama, Tokyo, JP;

Takefumi Okumura, Tokyo, JP;

Takayuki Kimura, Tokyo, JP;

Assignee:

Hitachi Chemical Company, Ltd., Tokyo, JP;

Attorney:

Crowell & Moring LLP

Primary Examiner:

Gregg Cantelmo

Int. Cl.
CPC ...
H01M 4/36 (2006.01); H01M 4/131 (2010.01); H01M 4/136 (2010.01); H01M 4/1391 (2010.01); H01M 4/1397 (2010.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/58 (2010.01); H01M 10/0587 (2010.01); H01M 10/0525 (2010.01); H01M 10/04 (2006.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/364 (2013.01); H01M 4/131 (2013.01); H01M 4/136 (2013.01); H01M 4/1391 (2013.01); H01M 4/1397 (2013.01); H01M 4/366 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/5825 (2013.01); H01M 10/0431 (2013.01); H01M 10/0525 (2013.01); H01M 10/0587 (2013.01); H01M 2004/021 (2013.01); H01M 2220/30 (2013.01); Y02E 60/122 (2013.01); Y02P 70/54 (2015.11);
Abstract

In a lithium ion battery having a discharge capacity of 30 Ah or more and 125 Ah or less, the positive electrode composite has the following configuration: The positive electrode composite contains a mixed active material of layered lithium nickel manganese cobalt composite oxide (NMC) and olivine lithium iron phosphate (LFP), a density of the positive electrode composite is 2.0 g/cmor more and 2.6 g/cmor less, and an application quantity of the positive electrode composite is 100 g/mor more and 200 g/mor less. Furthermore, a weight ratio (NMC/LFP) of the mixed active materials is set to 10/90 or more and 60/40 or less. Alternatively, when a discharge capacity is defined as X and the weight ratio is defined as Y, the relation of Y<−0.0067X+1.84 (30≦X≦125) is satisfied.

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