NOVELTY - The battery (10) has a container (12) in which as electrode assembly (14) is accommodated in a case (11). A cover (13) plugs up an opening (12a) of the container. The case is sealed by welding a cover peripheral portion (13a) and opening portion. A heat transfer member (60) is formed by a first (61) and second (62) heat exchanger plates which is provided between the cover and electrode assembly. A peripheral (62a) of second heat exchanger plate is located inside a peripheral (61a) of first heat exchanger plate that is located outside the opposing region seeing from the lamination direction.    USE - Secondary battery e.g., lithium ion battery and nickel hydride battery for vehicle e.g., electric vehicle, plug in hybrid vehicle and motor vehicle.    ADVANTAGE - The transmission of heat at the time of welding to an electrode assembly is suppressed, and heat exchange between the electrode assembly and a case is performed suitably. Production of precipitate resulting from a local load being provided to the opposing region that contributes to charging/discharging is avoided. The heat which crosses to the electrode assembly is suppressed by lengthening the heat transfer path between welding location and electrode assembly.    DETAILED DESCRIPTION - The battery (10) has a container (12) in which as electrode assembly (14) is accommodated in a case (11). A cover (13) plugs up an opening (12a) of the container. The case is sealed by welding a cover peripheral portion (13a) and the opening portion. A heat transfer member (60) is formed by a first (61) and second (62) heat exchanger plates which is provided between the cover and electrode assembly. A peripheral (62a) of second heat exchanger plate is located inside a peripheral (61a) of first heat exchanger plate that is located outside the opposing region seeing from the lamination direction.    DESCRIPTION OF DRAWING(S) - The drawing shows the disassembled perspective view of a secondary battery.    Secondary battery (10)    Case (11)    Container (12)    Container opening (12a)    Cover (13)    Cover peripheral portion (13a)    Electrode assembly (14)    Heat transfer member (60)    First heat exchanger plate (61)    Peripheral of first heat exchanger plate (61a)    Second heat exchanger plate (62)    Peripheral of second heat exchanger plate (62a)