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. 11, 2004
Filed:
Feb. 02, 2001
Kensuke Hironaka, Fukaya, JP;
Kenji Nakai, Fukaya, JP;
Yoshimasa Koishikawa, Honjou, JP;
Yuichi Takatsuka, Osato-gun, JP;
Kenji Hara, Ueno, JP;
Tomohiro Iguchi, Fukaya, JP;
Katsunori Suzuki, Nabari, JP;
Koji Higashimoto, Fukaya, JP;
Takeshi Nakano, Kumagaya, JP;
Shin-Kobe Electric Machinery Co., Ltd., Tokyo, JP;
Abstract
A non-aqueous electrolytic secondary battery that can prevent a drop in the power even in a large current discharge is provided. Porosity of a separator is larger than or the same as porosity of a positive electrode mixture and a porosity of a negative electrode mixture. Particularly, the porosity of the positive electrode mixture is 20% to 50%, the porosity of the negative electrode mixture is 20% to 50%, and the porosity of the separator is 20% to 60%. The separator becomes rich in the volume of the electrolytic solution that infiltrates into interfacial aperture between the separator and the negative electrode. When the large current discharge is carried out in a short time, lithium-ions are released/occluded from the electrodes and the electrolytic solution can gain the released/occluded lithium-ions with a small interfacial resistance.