NOVELTY - A sealed battery comprises a flat electrode assembly (11) having positive electrode substrates exposed at one end and negative electrode substrates exposed at the other end. A collector (18-1) and a collector receiving portion (18-2) are attached to both sides of positive electrode substrate(s) and negative electrode substrate(s). The positive electrode substrates and/or negative electrode substrates, collector, and collector receiving portion are made of copper (alloy) or aluminum (alloy).    USE - Sealed battery is used in applications requiring large current, such as hybrid electric vehicles and pure electric vehicles.    ADVANTAGE - The sealed battery has no molten trace at edge portion, no trace of spark generation, and no fusion-bonded trace with electrode bar for resistance welding in the collector or collector receiving portion. The substrates are not damaged. The sealed battery has highly reliable resistance welds.    DETAILED DESCRIPTION - A sealed battery comprises a flat electrode assembly having positive electrode substrates exposed at one end and negative electrode substrates exposed at the other end. A collector and a collector receiving portion are attached to both sides of positive electrode substrate(s) and negative electrode substrate(s). The positive electrode substrates and/or negative electrode substrates, collector, and collector receiving portion are made of copper (alloy) or aluminum (alloy). The collector and collector receiving portion have a planar portion including a portion in contact with and resistance-welded to the corresponding substrates. Bent portion (18b) extends from the planar portion and is bent at the bottom side of the substrates into a direction away from the substrates. Bent portion (18c) is provided at the leading side of the substrates. An INDEPENDENT CLAIM is included for manufacture of sealed battery.    DESCRIPTION OF DRAWING(S) - The drawing shows an enlarged cross-sectional view of the sealed battery.    Electrode assembly (11)    Negative electrode collector (18-1)    Collector receiving portion (18-2)    Planar portion (18a)    Bent portions (18b,18c)