Patent ID: 8976508
Filing Date: 2015-03-10
Classification: H01G,H01M,Y02E,Y02P

Abstract:
1. An electrochemical cell comprising: a hermetic container having a base member, a jointing material fixed to the base member and a lid member welded on the base member via the jointing material, and in which a sealed housing space is formed between the base member and the lid member is defined; and an electrochemical element which is housed inside the housing space and which is available to effect charging and discharging, wherein the base member is formed in the shape of a closed-end tube having a flat-plate-like bottom wall portion and a frame-like peripheral wall portion, the lid member being made of stainless steel and having a thickness less than or equal to 30 μm and the peripheral wall portion of the base member has a wall thickness equal to or greater than 400 μm.