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:
Nov. 20, 2007
Filed:
Sep. 04, 2003
Kazuhito Hatta, Miyagi, JP;
Tsuyonobu Hatazawa, Miyagi, JP;
Tomitaro Hara, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
A nonaqueous-electrolyte battery which is capable of preventing introduction of water and deterioration in the capacity thereof is disclosed. The nonaqueous-electrolyte battery according to the present invention incorporates a case constituted by laminated films; and a unit cell which is accommodated in the case and having a structure that the peripheries of the case is sealed with heat, wherein when an assumption is made that the quantity of water capable of penetrating a heat-weld resin layer which is the innermost layer of the case having a thickness of T (μm) is R (g/m·day), the cross sectional area of resin in a heat-sealed portion is S (cm), an average width of the heat-sealed portion is W (cm) and the capacity of the unit cell is C (Wh), the following relationship is satisfied: (T×R×S)/(W×C)≦0.96 μg/Wh·day. When the foregoing structure is employed, water introducing rate can be reduced to 350 μg/year or lower per capacity (Wh).