US 2014/0004400 A1 · NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND VEHICLE

Abstract

The present invention provides a non-aqueous electrolyte secondary battery with great high-rate discharge properties while being less susceptible to an extensive internal short circuit and likely to provide proper assembly. The non-aqueous electrolyte secondary battery comprises a separator (13) placed between a positive electrode and a negative electrode. Separator (13) comprises a porous resin layer (60), and a porous heat-resistant layer (70) overlaid at least on a first face of resin layer (60). Heat-resistant layer (70) comprises a filler consisting of an inorganic material, and a binder. Heat-resistant layer (70) has a porosity of 55% or higher. Heat-resistant layer (70) exhibits a 90° peel strength of 2.9 N/m to 15.1 N/m to the resin layer (60).

Claims9

Dependent claims

A non-aqueous electrolyte secondary battery comprising a positive electrode, a negative electrode, a separator placed between the positive electrode and the negative electrode, and a non-aqueous electrolyte impregnated at least in the separator, wherein:

the positive electrode, the separator and the negative electrode are overlaid on top of each other and wound,
the separator comprises a porous resin layer, and a porous heat-resistant layer overlaid at least on a first face of the resin layer;
and
the heat-resistant layer comprises a filler consisting of an inorganic material, and a binder, wherein:
the heat-resistant layer has a porosity of 55% or higher, and the heat-resistant layer exhibits a 90° peel strength of 2.9 N/m to 15.1 N/m to the resin layer.

2 more elements

Dependencies are inferred from the claim text.

Non-aqueous electrolyte secondary battery and vehicle

Life of this patent

Non-aqueous electrolyte secondary battery and vehicle

Life of this patent

Abstract

Claims9