Patent ID: 7510791

Claim:
A battery pack comprising: a battery cell having cathode and anode terminals formed on the upper surface thereof to supply a rated operating voltage; a protective circuit module (PCM) block comprising (i) a PCM assembly electrically to be connected to the battery cell, in which the PCM assembly includes a rectangular printed circuit board (PCB) having a size approximately the same as that of the upper surface of the battery cell, and a protective circuit module formed on the PCB to provide a function of preventing overcharge, over-discharge and over-current of the battery cell, (ii) a cap housing formed by injection molding to hold the PCM assembly, and (iii) cathode and anode nickel plates attached to a lower surface of the PCM assembly to provide the electrically connected portion between the battery cell and the PCM block; a first connecting hole perforated through the cap housing and a second connecting hole perforated through the printed circuit board, the first and second connecting holes being aligned with each other in such a way that the cathode nickel plate is exposed to the outside of the battery pack through the first and second connecting holes to enable a welding pin to reach the cathode nickel plate; and an insulating member to be inserted into or attached to the connection hole after the welding wherein the cap housing is partially molded within a resin by partially encasing the PCM block to a front side of the PCM assembly with the resin, and, the PCM block further comprising; a clad metal PCM guide inserted and fixed between the PCM assembly and the battery cell in order to prevent the PCM assembly from being pushed in a direction of the battery cell upon resin molding, wherein the PCM guide is formed with bond line grooves spaced a predetermined distance from each other from an outer line thereof for injecting adhesives upon fixing.