Sealed prismatic battery

A sealed prismatic battery comprising:

• a prismatic battery case made of a plurality of prismatic cell cases coupled together via partition walls;
• a plurality of electrode plate groups respectively encased in the cell cases and comprised of a plurality of positive electrode plates and a plurality of negative electrode plates alternately stacked upon one another with separators interposed therebetween, one side edge of the positive electrode plates and the other side edge of the negative electrode plates being protruded in opposite directions to form respective lead portions;
• and
• a plurality of collectors each bonded to the lead portions on both sides of the electrode plate groups, wherein
• a plurality of openings are formed at least in one side wall of the prismatic battery case at locations corresponding to the partition walls such as to bridge across two adjacent cell cases on both sides of each partition wall,
• pairs of conductive connection plates are arranged on both sides of each of the partition walls such as to be connected together through the partition walls, part of the conductive connection plates facing the openings,
• the collectors are connected to the part of the conductive connection plates facing the openings after the electrode plate groups are accommodated in the cell cases, and
• the openings are sealed in a manner that separates the cell cases.