BATTERY CELL, BATTERY AND ELECTRICAL APPARATUS

A battery cell may include: a case, an outer surface thereof away from the interior of the battery cell may be clad with a first insulating layer; an end cap assembly, which may be disposed at an end portion of the case along the length direction of the battery cell; and an end cap patch, which may be attached to a surface of the end cap assembly away from the interior of the battery cell; wherein the end cap patch may be adhered with a second insulating layer, and the second insulating layer may be at least partially folded to the case and connected with the first insulating layer.