Patent ID: 8652676

Claim:
An assembled battery system comprising: at least two non-aqueous electrolyte secondary cells and at least two parallelepiped cell cases, each of the secondary cells is installed in one of the at least two parallelepiped cell cases and comprises a positive electrode that occludes and emits lithium ions, a negative electrode that occludes and emits lithium ions, and a non-aqueous electrolyte comprising an electrolyte dissolved in a non-aqueous solvent, wherein: the non-aqueous electrolyte secondary cells are arranged so that each of larger area sides of an adjacent pair of the parallelepiped cell cases face in parallel one another; a cooling member is provided between the adjacent pair of the parallelepiped cell cases; the cooling member comprises an opening portion and an isolating wall, which define a cooling medium flow conduit between two of the larger area sides of the adjacent pair of the parallelepiped cell cases; the cooling member further comprises a cooling medium supply of inlet and a cooling medium exit outlet, and the opening portion is communicated with the supply inlet and the exit outlet; the supply inlet and the exit outlet are formed on one side of the cooling member that does not face the adjacent pair of the parallelepiped cell cases, with the supply inlet being provided more towards a center of the one side of the cooling member than the exit outlet; and the flow conduit extends from the supply inlet towards a central portion of the cooling member and then turns to a peripheral portion of the cooling member, and finally arrives at the exit outlet.