US 2023/0420803 A1 · NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

Abstract

An embodiment of the present invention provides a non-aqueous electrolyte secondary battery wherein a separator has a porous base material and a heat-resistant layer including a filler and a binding agent. The heat-resistant layer includes a first heat-resistant layer formed on a first surface of the base material facing a positive electrode and a second heat-resistant layer formed on a second surface of the base material facing a negative electrode. The first heat-resistant material is formed as a sheet on the first surface of the base material and the second heat-resistant layer is formed as dots on the second surface of the base material. The average value of the intervals between the plurality of dots constituting the second heat-resistant layer is 30-100 μm.

Claims5

Dependent claims

A non-aqueous electrolyte secondary battery, comprising:

a positive electrode;
a negative electrode;
and
a separator, wherein
the separator has:
a porous substrate;
and heat-resistant layers each including a filler and a binder,
the heat-resistant layers include:
a first heat-resistant layer formed on a first surface of the substrate facing the positive electrode;
and a second heat-resistant layer formed on a second surface of the substrate facing the negative electrode,
the first heat-resistant layer is formed as a sheet on the first surface of the substrate, and
the second heat-resistant layer is formed as dots on the second surface of the substrate, and an average value of pitch of a plurality of the dots is greater than or equal to 30 μm and less than or equal to 100 μm.

9 more elements

Dependencies are inferred from the claim text.

Non-aqueous electrolyte secondary battery

Life of this patent

Non-aqueous electrolyte secondary battery

Life of this patent

Abstract

Claims5