Filled glass fiber separators for batteries and method for...

H - Electricity – 01 – M

Patent

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Details

H01M 2/14 (2006.01) H01M 2/16 (2006.01) H01M 10/06 (2006.01)

Patent

CA 2232558

A multi-layer sheet useful as a separator (10) in a lead acid battery is disclosed. The sheet comprises at least a first layer (12) and a second layer (14), and has been produced by the method consisting of the steps of: forming the first layer (12) by depositing a first, substantially binder free furnish consisting essentially of glass fibers onto the wire (36) of a paper making machine (30) and forming the second layer (14) by depositing a second, substantially binder free furnish consisting essentially of glass fibers and silica powder or another suitable silicate powder onto the first layer (12) on the wire (36) of the paper making machine (30). The silica or silicate powder has a particle size and is present in the second layer (14) in an amount such that, if the second, substantially binder free furnish was deposited directly on the wire (36) of the paper making machine (30), a significant portion of the silica or silicate powder would pass through the wire (36).

L'invention concerne une plaque à couches multiples utile comme séparateur (10) dans une batterie au plomb. La plaque comprend au moins des première (12) et seconde (14) couches, et elle est produite par un procédé consistant (a) à former la première couche (12) en déposant une composition sensiblement sans liant constituée pour l'essentiel de fibres de verre, sur la toile métallique (36) d'une machine à papier (30) et (b) à former une seconde couche (14), en déposant une seconde composition sensiblement sans liant et constituée pour l'essentiel de fibres de verre et de poudre de silice ou d'un autre silicate approprié, sur la première couche (12) qui se trouve sur la toile métallique (36) de la machine à papier (30). La poudre de silice ou de silicate a une granulométrie et elle est présente dans la seconde couche en une quantité telles que, si la seconde composition sensiblement exempte de liant était déposée directement sur la toile métallique (36) de la machine à papier (30), une partie significative de la poudre de silice ou de silicate traverserait la toile (36).

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