| abstract |
This invention makes it a subject to improve the durability of the electrical storage device which has high capacity characteristic and high output characteristic. n The electrical storage device 10 includes a first power storage element 29 having a positive electrode mixture layer 22 and a negative electrode mixture layer 17 opposite thereto, and a positive electrode mixture layer 27 and a negative electrode mixture layer 17 opposite thereto. And a second power storage element 30 having a. The first power storage element 29 and the second power storage element 30 are connected in parallel. In addition, in order to increase the capacity of the first power storage element 29, the positive electrode mixture layer 22 includes lithium cobaltate. On the other hand, in order to increase the output of the second power storage element 30, the positive electrode mixture layer 27 contains activated carbon. The through hole 16a is formed in the current collector 16 disposed between the positive electrode mixture layer 22 and the positive electrode mixture layer 27. In addition, the positive electrode terminal 25 is connected to the positive electrode current collector 21 of the power storage element 29 having a high capacitance characteristic through a current supply path 24 having a resistor 23. Accordingly, the current flowing through the first power storage element 29 can be limited at the time of high current charge / discharge. Therefore, during high-rate charging and discharging, it is possible to protect the first power storage element 29 to improve the durability of the power storage device 10. |