Patent ID: 8124276

Claim:
A bipolar battery, comprising: a bipolar electrode composed by forming a positive electrode active material layer on one surface of a current collector and forming a negative electrode active material layer on the other surface of the current collector; and a separator composed to be stacked alternately with the bipolar electrode, wherein, in a single cell layer composed by including the positive electrode active material layer, the separator and the negative electrode active material layer, which are adjacent to one another, a thickness of the separator is 0.68 times or more to less than 1.0 times a thickness of the positive electrode active material layer, and is 0.68 times or more to less than 1.0 times a thickness of the negative electrode active material layer, wherein a plurality of the single cell layers are stacked on one another, and the hardness Shore A of the separator of at least one layer differs from the hardnesses Shore A of the separators of the other layers.