BATTERY CELL AND ELECTROCHEMICAL DEVICE INCLUDING SAME

A battery cell, comprising a first electrode plate, an separator and a second electrode plate, the first electrode plate, the separator and the second electrode plate are stacked in sequence along a first direction, the battery cell also includes a first side surface and a second side surface which are disposed along the first direction and adjacent to each other, the first side surface and the second side surface are connected through a first connection region, the battery cell further includes an adhesive film, and the adhesive film is disposed in the first connection region, and is bonded to the first electrode plate, the separator and the second electrode plate, thereby improving safety of the battery cell.