| 摘要 |
PURPOSE:To allow no chance of active material falling-out or crack occurrence during the winding work of plates by providing stripe like grooves, which facilitate their winding, at least on one face of both of positive/negative plates or a negative plate in an enclosed battery provided with a group of spiral plates. CONSTITUTION:Stripe like grooves 4 are provided along a plate width direction, on one face of a belt like negative plate or both of positive/negative plates, desirably on the faces to be outside when the plates are wound. Owing to the grooves 4, it allows no chance of falling-out or crack occurrence of applied active material on core material 3 during the winding work of the plates, and it is possible to lengthen life and to increase capacity. |
