Secondary cell

Details Secondary cell Secondary cell

2007-09-25

2007-09-25

Maples, John S. (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S094000, C429S161000, C429S164000

Reexamination Certificate

active

10484012

ABSTRACT:
A secondary cell comprises an electrode unit housed in a cell can comprising a cylinder having a bottom and a closed opening, and a current collector plate50is provided at one end of the electrode unit. The current collector plate50has a plurality of protrusions52extending radially thereof and joined to an edge of the electrode unit. The surface of the current collector plate50to be joined to the bottom wall of the cylinder has a flat region R extending on a predetermined closed-loop track on the surface, and the portions of the current collector plate50and the cylinder to be joined are subjected along the flat region R to laser welding from outside the cylinder.

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