LEAD-ACID BATTERY

There is provided a lead-acid battery in which the joint state between a lid body and a lid body cover can be checked based on both the joint state between a protruding portion in the periphery of a second exhaust hole and a joining portion of the lid body cover, and the joint state between a protru...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: HOJO EIJI, SHIOTA MASASHI, NAKAYAMA YASUHIDE, OHSAKI SHIN, EGAMI SHINICHI
Format: Patent
Sprache:eng
Schlagworte:
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Beschreibung
Zusammenfassung:There is provided a lead-acid battery in which the joint state between a lid body and a lid body cover can be checked based on both the joint state between a protruding portion in the periphery of a second exhaust hole and a joining portion of the lid body cover, and the joint state between a protruding portion of the lid body and a joining portion of the lid body cover. The lead-acid battery comprises: a container having at least one cell chamber; a lid body 1 for covering a top opening of the container, the lid body 1 having on a top surface a recessed portion 4, the recessed portion 4 having therein an annular protruding portion 4C protruding upward and having, in an area of a bottom wall inside the protruding portion, an exhaust hole 4D for exhausting gas from the cell chamber, wherein a guide passage for guiding gas from the exhaust hole 4D to the outside is formed by joining the protruding portion 4C with a joining portion provided on the lid body cover; an annular groove 4M formed between the protruding portion and the vertical wall is covered with an outer periphery of the lid body cover 5; and the guide passage is isolated from the groove 4M.