CELL INTERCONNECTION STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a cell interconnection structure capable of being assembled easily at low cost and excellent in connection strength. SOLUTION: This connecting structure comprises a cylindrical battery 20 serially connected through a connecting body 21. The cylindrical battery 20 is provided with a positive electrode plate 20A in an upper surface and a positive electrode terminal 20B protruded in a center of the positive electrode plate 20A. The connecting body 21 has a two-stage structure constructed of a large cylinder part 21A for housing a can bottom part 20C of the cylindrical battery 20 and a small cylinder part 21B placed under the large cylinder part 21A and formed of a through hole 21b as a positioning hole almost the same dimensions as the positive electrode terminal 20B in center. A plurality of small holes 21d are formed on a side part 21c of the large cylinder part 21A and on a bottom part 21a of the small cylinder part 21B, respectively. The bottom part 21a of the small cylinder part 21B is welded to the positive electrode plate 20A of the cylindrical battery 20 and the side part 21C of the large cylinder part 21A is welded to the can bottom part 20C of the cylindrical battery 20 by the parallel resistance welding method using the small holes 21d as a reactive shunt preventing hole.