Protector for electrochemical element

Abstract

The invention aims to provide a protector that is prevented from being loosened from an electrochemical element, prevented from having dispersion in dimension and prevented from coming off the electrochemical element. In a protector 200 of an electrochemical element 100 , that entirely covers an electrochemical element entirely covered with an aluminum laminate film 90 , improvement is that the protector 200 has a recess 210, 220 that receives a wrinkled portion 92 of the aluminum laminate film 90 , the wrinkled portion 92 being formed at a corner portion of the electrochemical element 100 . Thus, when it is intended to mount the protector 200 to the electrochemical element 100 , the wrinkled portion 92 of the aluminum laminate film 90 is received into the recess 210, 220 that is to say, the recess 210, 220 serves as a relief for the wrinkled portion 92 . Thus, the protector 200 can be intimately connected to the electrochemical element 100.

1 . A protector for an electrochemical element, that entirely covers an electrochemical element entirely covered with an aluminum laminate film,
 which is characterized by having a recess that receives a wrinkled portion of the aluminum laminate film, the wrinkled portion being formed at a corner portion of the electrochemical element.   
     
     
         2 . A protector for an electrochemical element as claimed in  claim 1 , which is further characterized in that portions of the protector other than the recess are in intimate contact with the aluminum laminate film. 
     
     
         3 . A protector for an electrochemical element as claimed in  claim 1 , which is further characterized by using, as a shock absorbing member, a thermoplastic elastomer, a vulcanized rubber, a foamed plastic, a foamed rubber or the like, which has a certain resiliency. 
     
     
         4 . A protector for an electrochemical element as claimed in  claim 1 , which is further characterized in that the wrinkled portion of the aluminum laminate film is produced when the electrochemical element is put into the aluminum laminate film shaped like a bag and an interior of the bag-shaped aluminum laminate film is vacuumed. 
     
     
         5 . A protector for an electrochemical element as claimed in  claim 1 , which is further characterized in that the electrochemical element is a secondary battery, such as, an electric double layer capacitor, Li-ion battery or the like. 
     
     
         6 . A protector for an electrochemical element as claimed in  claim 1 , which is further characterized in that the electrochemical element is rectangular parallelepiped in shape.