| abstract |
The present invention provides an electrochemical device capable of being thin enough to be built in a thin electronic device such as an IC card, and a manufacturing method thereof. The electrochemical device has: an element body (10) on which a pair of internal electrodes (16, 26) is laminated so as to sandwich a separator (11); an exterior sheet (4) covering the element body (10); 10) The sealing portion (40, 42) of the peripheral edge portion of the exterior sheet (4) is sealed by being immersed in an electrolyte solution; The lead terminals (18, 28) are drawn out from the parts (40, 42). At least a part of the resin tapes (40a, 40b) constituting the sealing parts (40, 42) of the lead terminals (18, 28) is thermally welded to the exterior sheet at a position not overlapping with the internal electrodes (16, 26) Resin-made inner layer (4B) on the inner surface of (4). |