Patent ID: 7985495

Claim:
An assembled battery, comprising mainly multiple non-aqueous secondary cells A and at least one electric device B for voltage detection containing a non-aqueous electrolyte connected to the multiple non-aqueous secondary cells A in series, wherein, when a difference in the non-aqueous secondary cell A between a voltage per cell (V A1 ) at a depth of discharge of 25% and a voltage per cell (V A2 ) at a depth of discharge of 75% is designated as ΔV A , and a difference in the electric device B between a voltage per cell (V B1 ) at a depth of discharge equivalent to the depth of discharge of 25% of the non-aqueous secondary cell A and a voltage per cell (V B2 ) at a depth of discharge equivalent to the depth of discharge of 75% of the non-aqueous secondary cell A, as ΔV B , the ΔV B of electric device B is greater than the ΔV A of non-aqueous secondary cell A, a battery capacity per cell (C B ) of the electric device B is greater than a battery capacity per cell (C A ) of the non-aqueous secondary cell A, and the electric device B is a non-aqueous secondary cell.