Electrochemical device

Abstract

Electrochemical device comprising: a first electrode sheet comprising a first current collector and a first material layer, wherein the first current collector comprises a first uncoated area and a first coated area and wherein the first material layer is arranged on the first coated area; a first tab arranged on the first uncoated area of ​​the first current collector;a second electrode sheet arranged opposite the first electrode sheet and comprising a second current collector, a second material layer, and a third material layer, wherein the second current collector comprises a second uncoated area, a second coated area, and a third coated area, the second material layer being arranged on the second coated area, the third material layer being arranged on the third coated area, the second electrode sheet being provided with a first groove, the second uncoated area and the third coated area being arranged in the first groove, the first groove comprising a first bottom surface and a first side wall, and the first bottom surface comprising the second coated area and the third coated area; wherein a projection of the first tab falls onto a projection of the first groove;and a first adhesive layer arranged in the first groove to adhere to the first base surface.;

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