초록 ▼

A method for manufacturing a lithium battery is provided. The battery includes electrodes formed of a layer of an active material, the active material being capable of occluding and discharging lithium electrochemically, provided on the surface of a current collector, electrode external terminals fo

A method for manufacturing a lithium battery is provided. The battery includes electrodes formed of a layer of an active material, the active material being capable of occluding and discharging lithium electrochemically, provided on the surface of a current collector, electrode external terminals for providing electricity to the outside of the battery, and an electrode tab joined at an end thereof to a surface of said current collector and at another end thereof to an electrode external terminal. The electrode tab has a roughened surface at the end joined to the current collector, and the roughened surface is welded to the surface of said current collector. The roughened surface is produced by chemical etching, abrasion by an abrasive, abrasion by ultrasonic waves or by blasting with an abrasive.

대표청구항 ▼

[What is claimed is:] [1.]roughening a surface of said electrode tab to provide a roughened surface having peaks and valleys wherein the difference (H) between a length (Hmax) of the highest peak from the untreated surface and a length (Hmin) of the deepest valley from the untreated surface is from

[What is claimed is:] [1.]roughening a surface of said electrode tab to provide a roughened surface having peaks and valleys wherein the difference (H) between a length (Hmax) of the highest peak from the untreated surface and a length (Hmin) of the deepest valley from the untreated surface is from 5 to 10 .mu.m;placing said electrode tab having the roughened surface in contact with said current collector so that the roughened surface of said electrode tab faces the surface of said current collector;welding said electrode tab and current collector together; andpressing said electrode tab and said current collector together in a direction of contact to pressure weld them.