Patent ID: 8900734

Claim:
A bipolar secondary battery, comprising: a plurality of laminated bodies connected in series, each laminated body comprising a plurality of bipolar electrodes laminated via an electrolyte layer and each bipolar electrode comprising: a plate-shaped current collector; a positive electrode active material layer arranged on one surface of the current collector; and a negative electrode active material layer arranged on another surface of the current collector; a positive electrode formed on one end of the plurality of laminated bipolar electrodes in a lamination direction; a negative electrode formed on another end of the plurality of laminated bipolar electrodes in the lamination direction; a temperature sensitive resistor arranged between the positive electrode and the negative electrode of a pair of adjacent laminated bodies, the temperature sensitive resistor increasing resistance in response to a temperature increase and having a smaller area than an electrical reaction area of the positive electrode active material layer and the negative electrode active material layer; and a current interrupting portion provided on the same plane as the temperature sensitive resistor so as to form a current control layer arranged between the positive electrode and the negative electrode of the pair of the adjacent laminated bodies, wherein the current interrupting portion has a higher electrical resistance than the temperature sensitive resistor.