Battery cell and battery module including the same

Abstract

Provided are a battery cell and a battery module including the same. The battery cell is provided with a vent part, which is a predetermined region of a sealing part of a case having a width narrower than that of the other region thereof, thereby making it possible to easily discharge gas.

What is claimed is: 
     
         1 . A battery cell comprising:
 a battery unit including a first electrode part, a second electrode part, and a separator;   first and second electrode taps each welded to the first and second electrode parts; and   a case having the first and second electrode taps protruded outwardly thereof, having a pouch form in which it is sealed while including the first electrode part, the second electrode part, and the separator in an inner portion thereof, and including a sealing part having a sealing member applied thereto and a vent part, which is a predetermined region of the sealing part having a width narrower than that of the other region thereof.   
     
     
         2 . The battery cell of  claim 1 , wherein the sealing part of the case is heat-fused and bonded by a pair of compression parts each provided with first and second grooves having a shape corresponding to that of the vent part. 
     
     
         3 . A battery module formed by stacking the battery cell of  claim 2  in plural. 
     
     
         4 . The battery cell of  claim 1 , wherein the vent part is formed so that a predetermined region from an inner side of the case to an outer side thereof is not bonded. 
     
     
         5 . The battery cell of  claim 4 , wherein the sealing part of the case is heat-fused and bonded by a pair of compression parts each provided with first and second grooves having a shape corresponding to that of the vent part. 
     
     
         6 . A battery module formed by stacking the battery cell of  claim 5  in plural. 
     
     
         7 . A method of manufacturing a battery cell, the method comprising:
 a manufacturing step of manufacturing a battery part including a first electrode part, a second electrode part, and a separator and welding each of first and second electrode taps to the first and second electrode parts;   a receiving step of receiving a battery part in a case so that in which the first and second electrode taps are protruded outwardly; and   a sealing step of heat-fusing and bonding a sealing part to which a sealing member is applied in the case to each other by a pair of compression parts provided with first and second grooves.   
     
     
         8 . The method of  claim 7 , wherein the sealing step includes:
 a disposing step of disposing each of the pair of compression parts at upper and lower sides of the sealing part so that the first and second grooves face each other; and   a heat-fusing step of heat-fusing a portion at which the pair of compression parts contacts the sealing part to form a vent part, which is a predetermined region of the sealing part having a bonding width narrower than that of the other region thereof.