| 摘要 |
PURPOSE:To facilitate insertion of a group of electrode plates into a battery case so as to improve battery assembly efficiency and to reduce dispersion of battery characteristics by providing a hollow part vertically penetrating the battery case in the part parallel. to the electrode plate among barrier walls. CONSTITUTION:Among barrier walls 5, in the first, the third, and the fifth barrier walls 5 from the short side face 4A of a battery case 1, a hollow parts 6 vertically penetrating the battery case are arranged, and the thickness of both faces 5A, 5B of the barrier wall 5 facing the hollow part 6 are thinner than the thickness of the face 4A of the outer circumferential wall. When the inside of the storage battery is turned into a decompression condition, the surface facing the part 6 in the wall 5 is brought into contact with the atmosphere, so that a differential pressure P works between the inside of the storage battery and the part 6. Therefore, the odd numbers walls 5 from the outer circumference wall face 4A are bent by the differential pressure P, while they always press the respective group of electrode plates 2 with constant force. As the wall 5 is thinner than the face 4A and is easily deformed, the outer circumference wall is not bent. Therefore, battery can be provided with stable characteristics while its life can be greatly prolonged, even when thickness of a separator has some errors. |
