MANUFACTURE OF POLE PLATE AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

Title:

MANUFACTURE OF POLE PLATE AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

Document Type and Number:

Japanese Patent JP3630529

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To enhance adhesion strength between a collector and an active material layer by applying an active material paste formed by kneading electrode active material powder, a rubber binding and solvent of specific ratio the collector, and thereafter, by drying while controlling, so that the solvent evaporated is until a specific ratio is reached with in a specific time.
SOLUTION: Sol-like active material paste, having proper fluidity by a solvent amount of 40 to 70 vol.% requeis a time of 0.5 to 2.5 minutes to turn into a non-fluid state of 35 vol.% by drying after application to a collector usually. Therefore, drying is conducted, for instance, by a constant temperature and constant pressure over. By this evaporation speed, the same becomes gel-like as the uniformization of binding agent distribution due to uniformaliziation of a solvent in an active paste layer is maintained, no separation of the active material and the binding agent is allowed which results from gravity difference or the like. When a positive electrode plate and a negative electrode plate by this manufacturing method are wound around into a spiral shape via a separator and are contained in a battery case, space use efficiency is high, since adhesion strength between a collector and an active material layer is strong so that a small radius of curvature is well acceptable.

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Inventors:

Noriaki Samitsu
Ohana Yorito
Hiroshi Maruyama

Application Number:

JP18395897A

Publication Date:

March 16, 2005

Filing Date:

July 09, 1997

Export Citation:

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Assignee:

Matsushita Electric Industrial Co., Ltd

International Classes:

H01M4/62; H01M4/139; H01M10/05; H01M10/0566; H01M10/0587; (IPC1-7): H01M4/04; H01M4/02; H01M4/62; H01M10/40

Domestic Patent References:

JP8111222A
JP10275616A

Attorney, Agent or Firm:

Masaru Ishihara

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