BUTTON-TYPE SECONDARY BATTERY AND METHOD FOR MANUFACTURING SAME

The present invention relates to a button-type secondary battery, comprising: a lower can that serves as a first electrode terminal; an upper can that is coupled to and surrounds the lower can and serves as a second electrode terminal; and a gasket that is provided between the lower can and the upper can, wherein indented lower insertion grooves and indented upper insertion grooves are respectively formed on surfaces of the lower can and the upper can, to which the gasket is adhered, and the lower insertion grooves and the upper insertion grooves are located spaced apart from each other so as not to face each other.