SECONDARY BATTERY
First Claim
1. A secondary battery comprising:
- an electrode body formed by superimposing a positive electrode including a belt-shaped positive electrode current collector, a positive electrode active material layer formed on a surface of the positive electrode current collector, a plurality of positive electrode tabs protruding from one side edge of the positive electrode current collector in a longitudinal direction thereof, and formed integral with the positive electrode current collector; and
a negative electrode including a belt-shaped negative electrode current collector, negative electrode active material layer formed on a surface of the negative electrode current collector, a plurality of negative electrode tabs each protruding from one side edge of the negative electrode current collector in a longitudinal direction thereof, and formed integral with the negative electrode current collector;
upon each other with a belt-shaped separator interposed between the electrodes, and rolling up the positive and negative electrodes and the separator into a spiral shape,at least one side edge of the positive electrode current collector in the longitudinal direction thereof including a plurality of step parts discontinuously formed in the longitudinal direction at unequal intervals, and extending at both sides of each step part with a deviation of 0.2 mm or more, andat least one side edge of the negative electrode current collector in the longitudinal direction thereof including a plurality of step parts discontinuously formed in the longitudinal direction at unequal intervals, and extending on both sides of each step part with a deviation of 0.2 mm or more.
1 Assignment
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Accused Products
Abstract
An electrode body of a secondary battery is formed by superimposing a positive electrode and a negative electrode upon each other with a belt-shaped separator interposed between the electrodes, and rolling up the positive and negative electrodes and the separator into a spiral shape. At least one side edge of a positive electrode current collector of the positive electrode in the longitudinal direction thereof includes a plurality of step parts discontinuously formed in the longitudinal direction at unequal intervals, and extends at both sides of each step part with a deviation of 0.2 mm or more. At least one side edge of a negative electrode current collector of the negative electrode in the longitudinal direction thereof includes a plurality of step parts discontinuously formed in the longitudinal direction at unequal intervals, and extends on both sides of each step part with a deviation of 0.2 mm or more.
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Citations
7 Claims
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1. A secondary battery comprising:
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an electrode body formed by superimposing a positive electrode including a belt-shaped positive electrode current collector, a positive electrode active material layer formed on a surface of the positive electrode current collector, a plurality of positive electrode tabs protruding from one side edge of the positive electrode current collector in a longitudinal direction thereof, and formed integral with the positive electrode current collector; and
a negative electrode including a belt-shaped negative electrode current collector, negative electrode active material layer formed on a surface of the negative electrode current collector, a plurality of negative electrode tabs each protruding from one side edge of the negative electrode current collector in a longitudinal direction thereof, and formed integral with the negative electrode current collector;
upon each other with a belt-shaped separator interposed between the electrodes, and rolling up the positive and negative electrodes and the separator into a spiral shape,at least one side edge of the positive electrode current collector in the longitudinal direction thereof including a plurality of step parts discontinuously formed in the longitudinal direction at unequal intervals, and extending at both sides of each step part with a deviation of 0.2 mm or more, and at least one side edge of the negative electrode current collector in the longitudinal direction thereof including a plurality of step parts discontinuously formed in the longitudinal direction at unequal intervals, and extending on both sides of each step part with a deviation of 0.2 mm or more. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification