Non-aqueous secondary battery and separator used therefor

Details Non-aqueous secondary battery and separator used therefor Non-aqueous secondary battery and separator used therefor

H - Electricity

01

M

H01M 2/16 (2006.01) H01M 2/18 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2496513

A non-aqueous secondary battery-use separator comprising a porous film enclosing a net-form support and consisting of organic polymer that swells in an electrolyte to hold it, wherein the net-form support has an average film thickness of 10-30 µm, METSUKE of 6-20 g/m2, a Gurley value of up to 10 sec/100cc, a MacMillan number (25~C) of up to 10, and MacMillan number × film thickness (µm) of up to 200, the separator has an average film thickness of 10-35 µm, METSUKE of 10-25 g/m2, a Gurley value of up to 60 sec/100cc or between 60 sec/100 cc and 500 sec/100cc, and a specific relational expression is induced between an effective active material mass in the battery system and the over-charge prevention function characteristic value of the separator from an electrochemical point of view to make battery characteristics compatible with safety.

L'invention concerne un séparateur utilisé avec un accumulateur non aqueux comprenant un film poreux renfermant un support en forme de filet et consistant en un polymère organique qui enfle dans un électrolyte afin de le maintenir. Le support en forme de filet possède une épaisseur de film moyenne de l'ordre de 10-30 µm, une valeur METSUKE de 6-20 g/m?2¿, une valeur Gurley de 60 sec/100cc maximum ou comprise entre 60 sec/100cc et 500 sec/100cc, et une expression relationnelle spécifique est induite entre une masse de matériau actif efficace dans le système de batterie et la valeur caractéristique de fonction de prévention de surcharge du séparateur d'un point de vue électrochimique afin de rendre les caractéristiques de la batterie compatibles avec la sécurité.

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