The invention provides a multi-series connection type battery cell pack, characterized by comprising a plurality of series-connected battery cells 1, a charge/discharge control switch 2 for performing charge/discharge control, a plurality of protective cir...

The present invention provides a closed type battery that is free from any sealing defects due to a sag of caulking with time, etc. The closed type battery is constructed of a monolithic electrode terminal (7) that comprises an insulating member (4A,4B) fo...

The invention provides a closed type battery having no electrolyte leakage and improved airtightness, which comprises a battery header in which an electrode-drawing sheet of polarity opposite to that of a battery can is fixed by caulking to an insulating m...