FIELD: electricity.
SUBSTANCE: invention claims a separator (1) having heat-resistant insulating layers for an electric device, which includes a polymer-based porous substrate (2) and heat-resistant insulating layers (3) formed at both surfaces of the polymer-based porous substrate (2) and heat-resistant particles having the melting point or the point of thermal softening of 150°C or more. The claimed separator is characterised by an optimal parameter in compliance with which the total thickness of the heat-resistant insulating layer is selected so that it ensures the optimal resistance of liquid electrolyte.
EFFECT: claimed separator also has sufficient mechanical strength and prevents short circuiting.
8 cl, 7 dwg, 1 tbl, 12 ex
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