| CPC H01M 50/562 (2021.01) [H01M 10/425 (2013.01); H01M 50/103 (2021.01); H01M 50/176 (2021.01); H01M 50/552 (2021.01)] | 10 Claims |
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1. A secondary battery, comprising:
a power generating element;
a battery case for accommodating therein the power generating element; and
a plurality of electrode terminals electrically connected with the power generating element and exposed to outside of the battery case,
at least one of the plurality of electrode terminals including:
a terminal part comprising a metal and connected with the power generating element;
an external connection part comprising a different metal from the metal of the terminal part and in contact with the terminal part; and
a molding resin part covering a periphery of a connection surface between the external connection part and the terminal part, wherein a part of the external connection part is exposed by the molding resin part, wherein
the external connection part includes a step part between an outer circumferential portion of the connection surface of the external connection part and the part of the external connection part, wherein the step part is external to the battery case, and
the molding resin part covers both the outer circumferential portion of the connection surface of the external connection part and the step part, wherein a center of the connection surface and a center of the part of the external connection part are concentric, and
a central axis is an axis connecting the center of the connection surface and the center of the part of the external connection part, and the outer circumferential portion of the connection surface is farther, in a cross-sectional view, from the central axis than from a peripheral edge of the part of the external connection part.
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