| 摘要 |
PURPOSE:To make the total thickness thin without decreasing the capacity of a unit cell by providing a fastening connection tool between a pair of upper and lower center sections and providing a coupling/fixing section between outer periphery sections of both cases. CONSTITUTION:Reinforcing ribs 15, 16 are formed along gaps of multiple unit cells 3 aligned and stored on plane sections of both cases 1, 2, and a fastening connection tool 17 is provided between them. Therefore, the plate thickness of the cases 1, 2 can be made thin as much as possible by the reinforcement effect of these reinforcing ribs 15, 16, and the fastening connection tool 17 can be fastened strongly. In addition, in both flanges 1A, 1B, a coupling/fixing section 18 of both cases 1, 2 is formed at the opposite edge section in the extension direction of the reinforcing ribs 15, 16, thereby the coupling can be strongly maintained without being loosened by the reinforcement effect of the reinforcing ribs 15, 16, and the fixing can be firmly made. Accordingly, the total thickness including the plate thickness of both cases can be made thin without decreasing the capacity of the unit cell. |
