COVER FOR A BATTERY HAVING A DUAL SEALING STRUCTURE

Disclosed herein is a cover having a double sealing structure for a storage battery. The cover includes: a lower cover body having cells, each of which has an inlet hole communicating with the storage battery body so that the electrolyte is injected into the storage battery body through the inlet hole; and an upper cover body which is coupled to an upper portion of the lower cover body. An exhaust port is formed on each of opposite ends of the upper cover body so that electrolyte or gas is discharged out of the storage battery through the exhaust port. In the lower cover body, exhaust cells are formed at positions closer to a medial portion of the storage battery than are respective outermost cells. Each exhaust cell having an outlet passage that guides leaked electrolyte or gas towards the exhaust port.