| 摘要 |
PROBLEM TO BE SOLVED: To infiltrate electrolyte evenly into the middle section of each plate in a plate group within a short time and improve stable battery characteristics, by accommodating a plate group in a battery jar such that it is wrapped with a retainer which includes silica in the center of a plane facing the group, is bag-shaped, and has liquid retention lower than that of a retainer between plates in a pressurized state in the battery jar, and by injecting electrolyte for battery-jar formation. SOLUTION: A bag-shaped retainer 4 decreases liquid infiltration rate outside of a plate group, prevents an electrolyte from penetrating rapidly, and allows the electrolyte to move easily in the plates. Therefore, it is made of nonwoven glass fiber material which has liquid retention lower than that of a retainer 3 in the plate group. Furthermore, the bag-shaped retainer 4 has a structure where surfaces other than its top are continuous so as to produce adhesion to the plate group and supply the electrolyte evenly all around plates. Because a silica adding section 6 is placed in the center of a plane facing the surface of the plate group, the electrolyte can easily move to the center of the plate group during the electrolyte injection, and adhesion to the whole plate group becomes higher. |
