Patent ID: 8662930

Claim:
A connection member for secondary batteries to achieve the electrical connection in a battery pack including two or more cylindrical secondary batteries in a physical contact manner, the connection member comprises a terminal connection unit for connecting the battery cells arranged in the longitudinal direction in series to each other, the terminal connection unit comprising: (a) an outer circumferential contact part configured to correspond to the external shape of an electrode terminal of a lower battery cell located below the connection member, the outer circumferential contact part contacting the electrode terminal of the lower battery cell at a region adjacent to the outer circumference of the electrode terminal, the outer circumferential contact part having a predetermined width; (b) an upward protruding part tapered upward from the outer circumferential contact part toward a central axis of the terminal connection unit for elastically supporting the lower battery cell; and (c) a central contact part contacting an electrode terminal of an upper battery cell located above the connection member, the terminal connection unit being constructed in a structure in which cut-out parts are formed at the upward protruding part and the central contact part, such that the cut-out parts extend from the upward protruding part to the central contact part and successively extend from the central contact part to the upward protruding part, to increase an elastically supporting force with respect to the electrode terminal of the battery cell.