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. 05, 2015
Filed:
Mar. 09, 2006
Takaya Saito, Utsunomiya, JP;
Yasutaka Kogetsu, Suita, JP;
Takashi Takeuchi, Hirakata, JP;
Hidekazu Hiratsuka, Kadoma, JP;
Takaya Saito, Utsunomiya, JP;
Yasutaka Kogetsu, Suita, JP;
Takashi Takeuchi, Hirakata, JP;
Hidekazu Hiratsuka, Kadoma, JP;
Abstract
To improve high temperature storage characteristic of a non-aqueous electrolyte secondary battery suitable for high input/output application, the structure of a positive electrode active material is optimized. The non-aqueous electrolyte secondary battery includes a positive electrode; a negative electrode; a separator interposed between the positive and negative electrodes; and a non-aqueous electrolyte. The positive electrode active material includes secondary particles, each formed of an aggregate of primary particles. A value (V) defined by the formula: V=(1−C/D)/(A×B) is not less than 0.0005 and not greater than 0.04, where an average particle size of the primary particles is A μm, an average particle size of the positive electrode active material is B μm, a tap density of the positive electrode active material is C g/ml, and a true specific gravity of the positive electrode active material is D g/ml.