Unitary separator and electrode structure and method of manufact

Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Separator – retainer or spacer insulating structure

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Details

Other Related Categories

429131, 429137, 429209, 429217, 429246, 429247, 429249, 296235, H01M 214, H01M 402

Type

Patent

Status

active

Patent number

060429658

Description

ABSTRACT:
A secondary battery separator comprises a fibrous core embedded in a polymeric sheet having improved electrode fusion thereto in unitary construction. In the process of manufacturing the separator, a fibrous, polymeric, substantially two-sided core matrix is coated with a polymer mixture containing a plasticizer and a solvent vehicle, and a vacuum is applied to the reverse side from the coated side to cause the polymer mixture to penetrate and infuse the capillary voids of the core matrix from the opposite coated side. The vacuum is continued until the solvent vehicle is fully volatilized. After the solvent vehicle has dissipated, the fiber matrix is turned over, and the process is repeated by applying a coating of polymer mixture to the second side and pulling a vacuum on the opposite side to cause penetration of the matrix.

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