COMBINATION OF A BATTERY AND A HEAT EXCHANGER FOR COOLING VEHICLE BATTERY

In an aluminum alloy heat exchanger (1) for cooling a vehicle battery (5) by coming in thermal contact with the battery, long-term water-tightness of a cooling medium flow passage (30) within the heat exchanger is ensured. [0002] [Means for Resolution] [0003] At least a part (20) of materials (10, 20) configuring a heat exchanger and forming a cooling medium flow passage (30) includes: an aluminum alloy core material (21) ; and an aluminum alloy sacrificial corrosion layer (22) provided on a cooling medium flow passage-side surface of this core material.