HEAT INSULATION CONTAINER, ITS MANUFACTURING METHOD, AND BATTERY PACK EQUIPPED WITH IT

PROBLEM TO BE SOLVED: To provide a heat insulation container in which the secondary battery even with high efficiency can be operated thermally independently, and a manufacturing method of the heat insulation container in which the degree of vacuum of the hollow part formed in vacuum state can be made extremely low, and a battery pack in which unit cells can be arranged densely effectively and which can be connected to AC 200 V without using a transformer. SOLUTION: The insulation container 4 comprises a lower part container 3 having a chassis part 11 and a surrounding wall part 12, and an upper part container 2 which has the top plate part 6, a body part 5, and the open bottom and is formed in double wall structure of vacuum state. The manufacturing method of the heat insulation container comprises a heating process of heating the upper part container 2 and an evacuation process of evacuating air from the hollow part of the upper part container 2. The battery pack 1 is provided with the heat insulation container 4, a unit cell housing 16, and a plurality of unit cells 15 housed in the unit cell housing 16. COPYRIGHT: (C)2006,JPO&NCIPI