Methods of manufacturing electric double layer capacitor cell and electric double layer capacitor

Abstract

A method of manufacturing the electric double layer capacitor cell includes preparing first and second electrode sheets by printing electrode material onto conductive sheets, respectively, with the exception of regions to be provided as first and second terminal lead-out portions in the conductive sheets; punching the first and second electrode sheets so as to form a plurality of first and second unit electrodes, respectively, each first unit electrode having the first terminal lead-out portion and each second unit electrode having the second terminal lead-out portion; stacking the first and second electrode sheets with a separator interposed therebetween in order that the plurality of first and second unit electrodes are overlapped; and cutting the first and second electrode sheets being stacked into the first and second unit electrodes.

1 . A method of manufacturing an electric double layer capacitor cell, the method comprising:
 preparing first and second electrode sheets by printing electrode material onto conductive sheets, respectively, with the exception of regions to be provided as first and second terminal lead-out portions in the conductive sheets;   punching the first and second electrode sheets so as to form a plurality of first and second unit electrodes, respectively, each first unit electrode having the first terminal lead-out portion and each second unit electrode having the second terminal lead-out portion;   stacking the first and second electrode sheets with a separator interposed therebetween in order that the plurality of first and second unit electrodes are overlapped; and   cutting the first and second electrode sheets being stacked into the first and second unit electrodes.   
     
     
         2 . The method of  claim 1 , wherein the punching of the first and second electrode sheets comprises forming connection portions in order to make connections between adjacent unit electrodes among the first unit electrodes or the second unit electrodes. 
     
     
         3 . The method of  claim 1 , wherein the punching of the first and second electrode sheets comprises forming a terminal lead-out portion between two adjacent unit electrodes among the first unit electrodes or the second unit electrodes and the cutting of the first and second electrode sheets comprises cutting the terminal lead-out portion so that cut terminal lead-out portions are provided to the two unit electrodes, respectively. 
     
     
         4 . The method of  claim 1 , wherein the separator has openings to expose the first and second terminal lead-out portions. 
     
     
         5 . The method of  claim 1 , wherein the first and second terminal lead-out portions are stacked to be led toward an opposite direction. 
     
     
         6 . The method of  claim 2 , wherein the cutting of the first and second electrode sheets comprises cutting the connection portions formed between the adjacent unit electrodes. 
     
     
         7 . The method of  claim 1 , further comprising: stacking a plurality of first electrode sheets, separators and second electrode sheets, and forming a fixing member binding a plurality of first or second terminal lead-out portions being stacked. 
     
     
         8 . A method of manufacturing an electric double layer capacitor, the method comprising:
 forming a lower case including a housing space of which a top surface is opened by integrating insulating resin and first and second external terminals, each of the first and second external terminals having a first surface exposed to the housing space and a second surface exposed to an outside of the lower case;   preparing first and second electrode sheets by printing electrode material onto conductive sheets, respectively, with the exception of regions to be provided as first and second terminal lead-out portions in the conductive sheets;   punching the first and second electrode sheets so as to form a plurality of first and second unit electrodes, respectively, each first unit electrode having the first terminal lead-out portion and each second unit electrode having the second terminal lead-out portion;   stacking the first and second electrode sheets with a separator interposed therebetween in order that the plurality of first and second unit electrodes are overlapped;   preparing an electric double layer capacitor cell by cutting the first and second electrode sheets being stacked into the first and second unit electrodes;   mounting the electric double layer capacitor cell in the housing space such that the electric double layer capacitor cell is electrically connected to the first surface; and   mounting an upper cap on the lower case so as to cover the housing space.   
     
     
         9 . The method of  claim 8 , wherein the forming of the lower case is performed by insert injection molding. 
     
     
         10 . The method of  claim 8 , wherein the electric double layer capacitor cell includes a first current collector having a first terminal lead-out portion, a second current collector having a second terminal lead-out portion, a first electrode formed on the first current collector, a second electrode formed on the second current collector and a separator disposed between the first and second electrodes, and
 the first and second terminal lead-out portions are electrically connected to the first surface of the first and second external terminals.