BATTERY CELL, BATTERY MODULE, BATTERY PACK, DEVICE USING BATTERY CELL AS POWER SUPPLY, AND BATTERY CELL ASSEMBLING METHOD

The present disclosure relates to a battery cell, a battery module, a battery pack, a device using the battery cell as a power supply, and a method for assembling the battery cell, to alleviate the problem of impurities falling into an electrode assembly. Wherein, the battery cell includes: an electrode assembly including a tab and a cell body, wherein the tab is connected to the cell body; a cover plate assembly including an electrode terminal and a cover plate, wherein the electrode terminal is disposed on the cover plate; a connecting sheet connected between the tab and the electrode terminal, the connecting sheet includes a first connecting portion and a second connecting portion, wherein the first connecting portion is connected to the tab, and the second connecting portion is connected to the electrode terminal; an insulating pallet disposed between the cell body and the connecting sheet; and an insulation member disposed between the insulating pallet and the second connecting portion. In the present disclosure, the insulation member is provided to catch impurities falling from the second connecting portion, thereby preventing short-circuit when the impurities enter the electrode assembly and improving the safety performance of the battery cell.