Electrochemical cell and fabrication method of the same

Abstract

An electrochemical cell is provided which facilitates the reduction in size and thickness. An electrochemical cell is configured of a base member made of a resin material and formed in a box shape, a conductive terminal made of a metallic material and fixed and penetrated from the inside to the outside of the base member, a frame member made of a metallic material and fixed to the base member, and a cover member welded with the frame member.

1 .- 15 . (canceled) 
   
   
       16 . A fabrication method of an electrochemical cell having: a separator; a base member for housing a pair of electrodes facing each other through the separator; a conductive terminal penetrating through the base member; a frame member joined to the base member; and a cover member joined to the frame member, the fabrication method of the electrochemical cell comprising the steps of:
 placing the frame member formed in a hoop in a forming mold of the base member;   placing the conductive terminal in the forming mold of the base member;   injecting a resin material into the forming mold to form the base member in a box shape;   assembling the base member where the conductive terminal and the frame member are joined thereto into a container;   attaching one electrode of the pair of the electrodes to the conductive terminal;   placing the separator and the other electrode of the pair of the electrodes on a surface opposite to a surface contacting with the conductive terminal of the one electrode; and   overlaying and welding the frame member with the cover member by a heating unit.   
   
   
       17 . The fabrication method of the electrochemical cell according to  claim 16 , further comprising the step of carrying current through the hoop to plate a brazing material over the frame member, after the step of assembling the base member where the conductive terminal and the frame member are joined thereto into the container. 
   
   
       18 . The fabrication method of the electrochemical cell according to  claim 17 , further comprising the step of continuously forming a plurality of the frame members in a hoop of metal foil formed with guide holes in which a part of the frame member has bridges, and separating the bridges from the hoop of the metal foil, before or after the step of overlaying and welding the frame member with the cover member by the heating unit. 
   
   
       19 . The fabrication method of the electrochemical cell according to  claim 18 , wherein in separating the frame member formed in the hoop, at least one part connecting the hoop to the frame member is left to form a frame connecting terminal extended from the frame member. 
   
   
       20 . (canceled) 
   
   
       21 . A fabrication method of an electrochemical cell having: a separator; a base member for housing a pair of electrodes facing each other through the separator; a conductive terminal penetrating through the base member; a frame member joined to the base member; and a cover member joined to the frame member, the fabrication method of the electrochemical cell comprising the steps of:
 placing the conductive terminal formed in a hoop in a forming mold of the base member;   placing the frame member in the forming mold of the base member;   injecting a resin material into the forming mold to form the base member in a box shape;   assembling the base member where the frame member and the conductive terminal are joined thereto into a container;   attaching one electrode of the pair of the electrodes to the conductive terminal;   placing the separator and the other electrode of the pair of the electrodes on a surface opposite to a surface contacting with the conductive terminal of the one electrode; and   overlaying and welding the frame member with the cover member by a heating unit.   
   
   
       22 . The fabrication method of the electrochemical cell according to  claim 21 , further comprising the step of carrying current through the hoop to plate a brazing material over the frame member, after the step of assembling the base member where the conductive terminal and the frame member are joined thereto into the container. 
   
   
       23 . The fabrication method of the electrochemical cell according to  claim 22 , further comprising the step of continuously forming a plurality of the conductive terminals in a hoop of metal foil formed with guide holes in which a part of the frame member has bridges, and separating the bridges from the hoop of the metal foil, before or after the step of overlaying and welding the frame member with the cover member by the heating unit. 
   
   
       24 . The fabrication method of the electrochemical cell according to  claim 23 , wherein in separating the conductive terminals formed in the hoop, at least one part connecting the hoop to the conductive terminals is left to form a frame connecting terminal extended from the frame member. 
   
   
       25 .- 30 . (canceled)