Button Type Secondary Battery

Abstract: The present invention relates to a button-type secondary battery, in which a strong binding force among a base plate, an electrode terminal, and an insulation gasket can be formed while reducing the thickness of a top plate assembly that is formed by bonding the base plate covering an opening of a can body in which an electrode assembly is inserted, the electrode terminal coupled to the base plate, and the insulation gasket for insulating the base plate and the electrode terminal. The button-type secondary battery according to the present invention has the diameter greater than the height and comprises: the electrode assembly; the can body in which the electrode assembly is inserted; the base plate which covers an upper opening of the can body and is coupled to the can body; the electrode terminal which is at least partially inserted in a through-hole formed in the base plate and which covers the through-hole; and the insulation gasket for insulating the electrode terminal and the base plate, wherein the electrode terminal, the insulation gasket, and the base plate are bonded to one another through heat fusion.

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