Non-aqueous electrolyte secondary battery

Abstract

To reduce a burden in foil collection of a cathode connection part, a cathode substrate. a cathode mixture layer, a separator, etc. when performing the foil collection of the cathode connection part.SOLUTION: An yield stress X of a cathode plate 110 comprising an insulation protective layer satisfies X≤0.122[N]; a flexure strength of the cathode plate 110, in which only an inner insulation protective layer 114b is formed, formed on a surface close to a cathode current collection part 15 is defined as MIN, which satisfies MIN≥0.0372[N]; and a flexure strength of the cathode plate 110, in which only an outer insulation protective layer 114a is formed, formed on a surface away from the cathode current collection part 15 is defined as MOUT, which satisfies MOUT≥0.0343[N]. A foil collection start point P1 of a cathode connection part 113 becomes an anode slit end 100e; damage of an inside separator 120 is eliminated; and bending of the cathode plate 110 after a compression step is also suppressed.SELECTED DRAWING: Figure 7

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