Cylindrical secondary battery pack

Abstract

Disclosed herein is a secondary battery pack including a cylindrical battery cell having an electrode assembly of a cathode/separator/anode structure mounted in a battery case together with an electrolyte in a sealed state, an insulative mounting member having an opening, through which a cathode terminal of the battery cell is exposed upward, the insulative mounting member being configured to have a structure in which a protection circuit module (PCM) assembly is disposed at the top of the insulative mounting member, the insulative mounting member being mounted to the top of the battery cell, a PCM assembly including a PCM having an external input and output terminal formed at the top thereof and connecting members coupled to the bottom of the PCM, the connecting members being connected to a protection circuit of the PCM, and an insulative cap coupled to the top of the battery cell so that the insulative cap surrounds the PCM assembly in a state in which the external input and output terminal is exposed, wherein the cathode terminal and an anode terminal of the battery cell are electrically connected to external input and output terminals via the connecting members through the PCM in a state in which the insulative mounting member and the PCM assembly are disposed on the battery cell.