Prismatic storage battery or cell with coiled winding

A prismatic battery comprising:

• a metal container formed of at least two large walls, two small walls and a bottom delimiting a cavity;
• and
• a non circular spiral winding arranged in said cavity and formed around a rigid spool including a horizontal upper flange having dimensions substantially the same as an opening of the cavity, and a horizontal lower flange having dimensions substantially the same as inner dimensions of the bottom;
• said spiral winding comprising successive turns of at least one composite strip including an anode and a cathode separated by a porous separator impregnated by an electrolyte, the opening of said container cavity being sealed by a cover carrying two contact terminals electrically connected to the anode and the cathode via connection means;
• and said flanges being joined by a vertical central neck and, on either side of said central neck, by two lateral necks, said necks delimiting two openings in a median part of the spool and a free space at its periphery to accommodate the spiral winding.