Disclosed herein is a lead unit of an energy storage device including a lead frame for fixing withdrawal electrodes of the energy storage device, including: an output terminal unit formed on an upper portion of the lead frame; a lead unit formed to extend from the output terminal unit to a lower portion of the lead frame and allowing end portions of the withdrawal electrodes to be inserted therein; and an expanding unit formed at an end portion of the lead unit and being brought into contact with the withdrawal electrodes in a compressed manner.;The fabrication process can be simplified compared with the existing welding method, and a contact area between the withdrawal electrodes and the lead unit can be increased to thus reduce contact resistance.
展开▼
