Patent ID: 8518567

Claim:
An automatic battery-overcharge power disconnection device, comprising: an integral insulating frame, having an enclosed space formed by enclosing frame edges of the insulating frame, two grooves formed on a first frame edge, a flexible flat board extended from a second frame edge, which is opposite to the first frame edge, into the enclosed space, an opening formed on the flexible flat board and located at an end of the flexible flat board, and a knife portion formed on an internal side of the opening and proximate to an end of the flexible flat board; an electro-conductive thin plate, having two half-plate portions symmetrically folded, and a folding portion formed and connected between the two half-plate portions, and the electro-conductive thin plate being passed into opening of the flexible flat board, such that the two half-plate portions clamp on the end of the flexible flat board, and the folding portion is situated at a position adjacent to the knife portion of the flexible flat board; and two conductive electrodes, each having a conductive connecting portion, and a connecting portion extended out from the conductive connecting portion, wherein the conductive connecting portions of the two conductive electrodes are disposed on two grooves of the insulating frame respectively, and the two connecting portions being electrically coupled to the two half-plate portions of the electro-conductive thin plate for a fixation, respectively; thereby the electro-conductive thin plate and the two conductive electrodes form an electric conduction loop through the folding portion if the electro-conductive thin plate and the two conductive electrodes are connected with an anode handle and a cathode handle of a battery, and once if the battery is overcharged and expanded to push on the flexible flat board, the end of the flexible flat board will in turn push against the electro-conductive thin plate, and the knife portion will cut the electro-conductive thin plate into the two half-plate portions at the folding portion to disconnect an electric conduction loop formed by the electro-conductive thin plate and the two conductive electrodes.