Electrode assembly and electric storage device
AssigneeGS Yuasa International Ltd.
InventorsYasuhiro Sogo, Kazuaki Matsuo, Kazuhide Tozuka
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Abstract
Provided are an electrode assembly including a sheet-shaped current collector that has, on at least one face thereof, a mixture agent layer containing an active material and is spirally wound, in which the current collector has, in a portion on a side of at least one end of a winding axis, a non-mixture agent layer part having no mixture agent layer formed therein, and a mass per unit area of the mixture agent layer is larger in an edge portion on the side of the non-mixture agent layer part by 0.3% or more and 1.0% or less than in a portion other than the edge portion; and an electric storage device including the electrode assembly.
Claims6
An electrode assembly comprising a sheet-shaped current collector that has, on at least one face thereof, a mixture agent layer containing an active material and is spirally wound,
- wherein the current collector has, in a portion on a side of at least one end of a winding axis, a non-mixture agent layer part having no mixture agent layer formed therein, and
- a mass per unit area of the mixture agent layer is larger in an edge portion on the side of the non-mixture agent layer part by 0.3% or more and 1.0% or less than in a portion other than the edge portion.
An electric storage device comprising an electrode assembly and a case for housing the electrode assembly,
- the electrode assembly including a sheet-shaped current collector that has, on at least one face thereof, a mixture agent layer containing an active material and is spirally wound,
- wherein the current collector has, in a portion on a side of at least one end of a winding axis, a non-mixture agent layer part having no mixture agent layer formed therein, and
- a mass per unit area of the mixture agent layer is larger in an edge portion on the side of the non-mixture agent layer part by 0.3% or more and 1.0% or less than in a portion other than the edge portion.
Dependencies are inferred from the claim text.