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The present invention provides an enclosed lead storage battery comprising a plate assembly consisting of a positive plate, negative plates and a separator, an electrolyte held in position by the plate assembly, and a jacket made of film- or sheet-formed synthetic resin and surrounding the plate ass

The present invention provides an enclosed lead storage battery comprising a plate assembly consisting of a positive plate, negative plates and a separator, an electrolyte held in position by the plate assembly, and a jacket made of film- or sheet-formed synthetic resin and surrounding the plate assembly and electrolyte. The jacket is of a multilayer laminate structure made by disposing a polyolefin film on the inside contacting the plate assembly and laminating a film of thermoplastic synthetic resin in two or more layers on the outside thereof. According to the present invention, the plate assembly can be encased with an unexpensive jacket of a simple construction, and the joint of the jacket to the pole posts of the plate assembly is strengthened to offer a leak-proof enclosed lead storage battery.

대표청구항 ▼

An enclosed lead storage battery comprising a plate assembly consisting of a positive plate, negative plates and a separator, pole posts connected to said positive plate and said negative plates, respectively, an electrolyte held in position by said plate assembly, and a jacket made of film- or shee

An enclosed lead storage battery comprising a plate assembly consisting of a positive plate, negative plates and a separator, pole posts connected to said positive plate and said negative plates, respectively, an electrolyte held in position by said plate assembly, and a jacket made of film- or sheet-formed synthetic resin wherein: (a) each pole post is provided with a layer of polyolefin resin around at least a portion of each post, said layers of polyolefin being adhered to said posts by a layer of epoxy resin; (b) the jacket comprises a laminate film or sheet comprising a polyolefin film on the inside contacting the plate assembly and a film comprising at least two layers of thermoplastic synthetic resin on the outside thereof; (c) the jacket is heat sealed at its periphery surrounding the plate assembly, excepting a portion which serves as a safety valve and which is left in a film-to-film adhering state; and (d) the jacket is also heat sealed to the layers of polyolefin resin adhered to the pole posts.