Patent ID: 7220516

Claim:
A bipolar battery, comprising: a plurality of bipolar electrodes, each having a positive electrode layer on one side of a collecting foil and a negative electrode layer on the other side of the collecting foil; a plurality of polymer electrolyte layers, each disposed between the bipolar electrodes; and a plurality of insulation layers, each of the insulation layers being provided on an exposed portion in a periphery of at least one side of the collecting foil, being a flexible and adhesive insulation film, and being protruded outward beyond the collecting foil with a protruding length longer than a thickness of one single cell, the single cell being composed of the positive electrode layer, the negative electrode layer and the electrolyte layer therebetween, wherein the insulation layers are bent to partially overlap each other, in order to isolate the positive electrode layer from the negative electrode layer within the single cell and to isolate between the electrolyte layers of the neighboring single cells.