Method Of Producing A Coin-Type Electrochemical Element And A Coin-Type Electrochemical Element

摘要

A coin-type electrochemical element enabling the external lead terminal portions to be accurately and reliably attached to a first lid portion and to a second lid portion of the coin-type electrochemical element, and a method of its production. Coin-type electric double layer capacitor ( 11 ) includes first lid portion ( 19 ) and second lid portion ( 18 ). External lead terminal portions ( 28 ) and ( 33 ) having a nearly triangular shape are separately connected to the outer surfaces of the lid portions. Upon providing external lead terminal portions ( 28 ) and ( 33 ) having the triangular shape, welded portion ( 35 ) is allowed to have an increased area enabling the coin-type electrochemical element of even a small size to be accurately and reliably welded and making it possible to provide the coin-type electrochemical element having excellent reliability.