JP2008147638A5 - - Google Patents

Claims (6)

First and second metal cases provided with a surface portion and a wall portion protruding in a substantially vertical direction from the periphery of the surface portion;
An annular gasket having a slit that accommodates the entire circumference of the front end of the wall portion of the first metal case, and having a bottom surface and an outer surface covered by the surface portion and the wall portion of the second metal case, respectively. ,
The tip of the wall of the second metal case is bent at an obtuse angle inward so that the tip pushes the gasket toward the first metal case,
The bottom surface of the gasket, the projecting portion of the annular to the outer surface concentric, characterized in that it is formed substantially over the front, the electrochemical cell. Apex of the projecting portion of the gasket, characterized in that it is arranged between the surface portion of the first metal case of the wall of the tip portion and the second metal casing, according to claim 1 Electrochemical cell. Wherein the height of the protrusion is 20Myuemu～200myuemu, electrochemical cell according to claim 1 or claim 2. The electrochemical cell according to any one of claims 1 to 3 , wherein a second protrusion is formed at the bottom of the slit of the gasket. The electrochemical cell according to any one of claims 1 to 4 , wherein the protruding portion of the gasket has an arc-shaped cross-sectional shape before assembly. The electrochemical cell is
Two polarizable electrodes impregnated with an electrolyte and adhered or bonded to the inner surfaces of the first and second metal cases, respectively;
A short-circuit preventing separator disposed between the two polarizable electrodes;
Characterized in that it is a further electric double layer capacitor having a electrochemical cell according to any one of claims 1 to 5.