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:
Dec. 29, 2015
Filed:
Oct. 15, 2010
Hiroki Nagai, Nagoya, JP;
Masahiro Morita, Toyota, JP;
Takashi Iwao, Moriguchi, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Abstract
A porosity X of a positive electrode mixture layerof a secondary batteryis 30(%)≦X. A mass ratio α of a positive electrode active materialin the positive electrode mixture layeris 0.84≦α≦0.925 and a mass ratio β of a conductive materialin the positive electrode mixture layeris 0.06≦β≦0.12. In the secondary battery, an index Y worked out from an expression below is 30 (mL/100 g)≦Y≦89 (mL/100 g). The index Y is given by the expression below, Y=A×α+B×β; where A is a DBP absorption number (mL/100 g) in the positive electrode active material; α is the mass ratio of the positive electrode active materialin the positive electrode mixture layer; B is a DBP absorption number (mL/100 g) of the conductive material; and β is the mass ratio of the conductive materialin the positive electrode mixture layer