Title:
NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP2734822
Kind Code:
B2
Abstract:
PURPOSE: To improve the safety and one cycle life property or a high energy density of nonaqueous electrolyte secondary battery by making the storable lithium ion amount of a negative electrode more than the dischargeable lithium ion amount from a positive electrode and an electrolyte.
CONSTITUTION: Inside a case 1 being a positive electrode terminal concurrently which is made by press-processing an organic electrolyte resisting stainless steel, and a sealing plate 2 being a negative electrode terminal concurrently which is made by punch-processing the same stainless steel, a negative electrode 3 which consists of a pyrolytic carbon and a positive electrode 6 which consists mainly of LiMn2O4 are abutted, placing a separator 5 which consists of polypropylene impregnated with an organic electrolyte, at the center, and they are enclosed and sealed by the sealing plate 2 through a gasket 4. By making the storable lithium ion amount of the negative electrode 3 more than the dischargeable lithium ion amount from the positive electrode 6 and the electrolyte, the metal lithium is separated on the negative electrode 3 even though the battery is made in an overcharged condition, and a fear of generating an internal short circuit is eliminated.
Inventors:
YOSHIDA HIROAKI
MIZUTANI MINORU
MIZUTANI MINORU
Application Number:
JP21590091A
Publication Date:
April 02, 1998
Filing Date:
July 31, 1991
Export Citation:
Assignee:
NIPPON DENCHI KK
International Classes:
H01M4/02; C01B31/02; H01M4/36; H01M10/05; H01M10/052; (IPC1-7): H01M10/40; H01M4/02; H01M4/58
Domestic Patent References:
| JP249364A |
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