Patent ID: 11870040
Assignee: PRIME PLANET ENERGY & SOLUTIONS, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. An electrode plate for use in a secondary battery, the electrode plate comprising:
an electrode core including a conductive metal material;
an electrode active material layer that is applied to a surface of the electrode core and includes an electrode active material; and
an electrode tab which protrudes to the outside from one end side in a width direction and in which the electrode active material layer is not applied and the electrode core is exposed, wherein
a first region of the electrode tab having an oxide film of the metal material with a thickness of 40 nm to 200 nm is formed in a region with a length that falls within a range from 0.01 mm to 0.2 mm, and that extends from an outer end side of the electrode tab toward the inside in the width direction, and the first region extends along the outer end side of the electrode tab, and
a portion of the electrode tab where the first region having the oxide film is not formed is provided between the first region and the electrode active material layer.