Patent ID: 11942662
Assignee: SANYO ELECTRIC CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 9:
10. The secondary battery according to claim 2, wherein
the tab is a positive electrode tab provided in the positive electrode plate,
the external terminal is a positive electrode external terminal electrically connected to the positive electrode tab,
the first current collector is a first positive electrode current collector,
the second current collector is a second positive electrode current collector,
the current collector protrusion is a positive electrode current collector protrusion,
the current collector opening is a positive electrode current collector opening,
the secondary battery further includes:
a negative electrode external terminal that is attached to the sealing plate;
a negative electrode tab that is provided in the negative electrode plate; and
a first negative electrode current collector and a second negative electrode current collector that electrically connect the negative electrode tab to the negative electrode external terminal, wherein

the negative electrode tab is disposed on an edge of the electrode body adjacent to the sealing plate,
the negative electrode tab is connected to the second negative electrode current collector,
the first negative electrode current collector has a negative electrode current collector protrusion,
the second negative electrode current collector has a negative electrode current collector opening, and
the negative electrode current collector protrusion is positioned in the negative electrode current collector opening, and the negative electrode current collector protrusion and an edge of the negative electrode current collector opening are weld-connected to each other.