Abstract: The present disclosure provides a battery cell, a battery and an electrical apparatus. The battery cell includes a housing comprising a first wall with a through hole; electrode terminal provided on the first wall, each electrode terminal having an end face facing the first wall, and at least a portion of the end face being opposite to the through hole; and a sealing element at least partially surrounding a peripheral side of the through hole, and at least a portion of the sealing element being connected between the end face and the first wall. The sealing element is provided with one of a boss and a groove, at least one of the electrode terminal or the first wall is provided with the other of the boss and the groove, and the boss is fitted with the groove.

Abstract: An end cover assembly comprises: a top cover sheet, comprising a first surface and a second surface which are arranged opposite to each other along the thickness direction of the top cover sheet, a mounting hole running through the top cover sheet along the thickness direction thereof, and an inner wall surface that faces the mounting hole; the top cover sheet is provided with a first insulating layer, and at least part of the first insulating layer is located on the inner wall surface.

Abstract: Provided are an end cover assembly, a battery cell, a battery, and an electrical device, relating to the field of batteries. The end cover assembly includes an end cover, a groove, and a reinforcing portion. The end cover has a first surface and a second surface opposite in its thickness direction. The groove is recessed from the first surface in a direction towards the second surface. The reinforcing portion protrudes from the first surface and/or the second surface, and surrounds the groove.

Abstract: A current collecting component for a battery cell having two output poles with opposite polarities for outputting electrical energy. The current collecting component includes two current collectors, an insulator, and a limiting structure. The two current collectors are arranged opposite each other along a width direction of the current collecting component and are configured to connect to the two output poles, respectively. The insulator is configured to connect the two current collectors and is located at least partially between the two current collectors in the width direction to insulate the two current collectors from each other. The limiting structure is configured to restrict the current collectors from leaving the insulator in the width direction.

Abstract: Provided are an end cover assembly, a battery cell, a battery, and an electrical apparatus. The end cover assembly is for a battery cell and comprises: an end cover provided with a pressure relief through hole; a pressure relief mechanism connected to the end cover and covering the pressure relief through hole, and configured to be actuated to release the pressure inside the battery cell when the pressure reaches a threshold; and a reinforcing mechanism, located on a side of the end cover facing away from an electrode assembly of the battery cell, and covering at least a part of the pressure relief through hole. The reinforcing mechanism is at least connected to a portion of the end cover at two sides of the pressure relief through hole along a first direction to enhance the strength of the end cover at the pressure relief through hole.