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AssigneeNippon Sheet Glass Co., Ltd.
InventorsTakahiro OHARA, Yuji KATAGIRI, Masaki ONISHI
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To provide a separator that has a strength preventing cracks from being formed in the production of a wound battery irrespective of a thin profile thereof, has high discharge rate characteristics, and has resistance to the formation of hydrofluoric acid due to the thermal decomposition of the electrolytic solution in high-temperature storage. A separator for a nonaqueous electrolyte secondary battery and a nonaqueous electrolyte secondary battery comprising the separator, wherein the separator comprising mainly glass fibers having added thereto MgO as an additive, the separator having a thickness of 45 μm or less, a winding breakage strength of 1.2 kg or more, an anti-short-circuit strength of 1.0 kgf or more, and a separator resistance of 1.0 ohm or less.
A separator for a nonaqueous electrolyte secondary battery, comprising mainly glass fibers having added thereto MgO as an additive, the separator having a thickness of 45 μm or less, a winding breakage strength of 1.2 kg or more, an anti-short-circuit strength of 1.0 kgf or more, and a separator resistance of 1.0 ohm or less.
Dependencies are inferred from the claim text.