Abstract: A battery cell, a battery, and an electric device are provided, and relate to the field of battery technologies. The battery cell includes a housing and a protruding structure, where the housing defines an accommodating cavity and includes a first housing wall, the protruding structure is disposed on the first housing wall and at least partially protrudes to a side of an outer surface of the first housing wall away from the accommodating cavity, a liquid filling hole is formed in the protruding structure, two ends of the liquid filling hole are an outer hole end and an inner hole end respectively, which are sequentially disposed along a direction from the outer surface to an inner surface of the first housing wall, and the inner hole end is located on a side of the inner surface of the first housing wall away from the accommodating cavity.

Abstract: A tab welded structure includes a conductive member and a tab formed by stacking a plurality of layers of pieces in a first direction. The conductive member is welded to the tab to form a fused area. The fused area includes a first fused portion and a second fused portion. The first fused portion extends from the tab into the conductive member in the first direction. The second fused portion is demarcated from the first fused portion, the second fused portion is located at a side portion of the first fused portion, and the second fused portion is configured to be connected to the first fused portion and the tab.

Abstract: A battery cell, a preparation method therefor, a battery, and a power consuming apparatus. The battery cell includes a housing and an electrode assembly. The housing is provided with a terminal. The electrode assembly is arranged in the housing, and includes an active material coating portion and a tab. The tab and the terminal are connected through welding to form a weld mark. The weld mark includes a first weld and a second weld. The second weld is located on a side of the first weld in a width direction of the first weld and partially overlaps with the first weld. A maximum thickness of the first weld is less than a maximum thickness of the second weld. In the technical solution of embodiments of the present application, the first weld is formed on a side of the second weld in a width direction of the second weld.

Abstract: A battery cell includes a housing, an electrode assembly, and a protective member. A terminal post is disposed on the housing. The terminal post has a first side and a second side that are opposite in a height direction of the terminal post. The first side faces the interior of the housing. A penetration hole penetrating through the first side and the second side is provided on the terminal post. The electrode assembly is disposed inside the housing, and includes an active-material coating portion and a conductive portion. At least a part of the conductive portion penetrates from the first side to the second side through the penetration hole. At least a part of the protective member is disposed on a side that is of the conductive portion and that is away from the electrode assembly, and covers the penetration hole.

Abstract: An electrode assembly includes: an active material coating portion, and a tab portion including a plurality of tab sheets which are arranged in a laminated manner; the plurality of tab sheets are laminated to form an overlapping area and an offset area; the overlapping area is welded to form a first welding portion; and the offset area is at least welded at a position far away from the active material coating portion to form a second welding portion.

Abstract: A cell, a battery, and an electric device belong to the field of battery technologies. The cell includes a case and a terminal body. The case defines an accommodating cavity. The case defines an accommodating cavity. The terminal body is arranged in the case. A liquid injection channel configured to communicate the accommodating cavity with an exterior of the case is formed on the terminal body, and the liquid injection channel includes an accommodating groove and a through hole running through a groove wall of the accommodating groove.

Abstract: A battery cell includes a case, a terminal post, and an electrode assembly. The terminal post is provided with ten cases. The electrode assembly includes an active material coating portion provided in the ten cases, and a tab portion electrically connected to the active material coating portion and the terminal posts. The tab portion includes multiple tab sheets. The multiple tab sheets are stacked and connected to form a gathered portion. The gathered portion has a first area and a second area. A compaction degree of the multiple tab sheets in the first area is greater than that in the second area. A connecting portion is formed at a position of the gathered portion used for being electrically connected to the terminal post. At least part of an edge of the connecting portion on the gathered portion is located in the first area.

Abstract: A battery cell, a battery, and a power consuming device are disclosed. The battery cell includes a first housing wall, an electrode post, and an insulating sealing structure. The first housing wall has a mounting hole. The electrode post includes a pass-through portion that extends through the mounting hole and a first extending portion connected to the pass-through portion. The first extending portion extends away from the central axis of the mounting hole to either the outer side of the outer surface or the inner side of the inner surface of the first housing wall. The insulating sealing structure is disposed between the electrode post and the first housing wall. The first extending portion includes a first section and a second section arranged in sequence along the outward direction, and the second section applies greater pressure to the insulating sealing structure than the first section.

Abstract: A casing assembly, a battery cell, a battery, and an electrical apparatus are provided. The casing assembly includes a casing with mounting holes and first terminals. Each first terminal comprises a terminal body, a first limiting platform, and a second limiting platform, which are integrally formed. The terminal body extends through a mounting hole, with the first and second limiting platforms positioned on opposite ends along the axial direction of the hole. The first limiting platforms engage the outer side of the casing, while the second limiting platforms engage the inner side, securing the first terminals to the casing via riveting. This design simplifies assembly and enhances the reliability and stability of the connection between the first terminals and the casing.

Abstract: A battery cell, a battery, and an electrical device are provided. The battery cell includes a housing and a core assembly. The housing has a first pole positioned within a mounting hole, with a first soldering surface. The core assembly comprises an active material coating portion and a conductive portion, which includes a second soldering surface in contact with the first soldering surface. A portion of the second soldering surface is soldered to the first soldering surface via a soldering portion. When projected onto a plane at the mounting hole's cross-section, the outer contour of the second soldering surface is within the outer contour of the first soldering surface. This design improves fast charging performance, reliability, and stability.

Abstract: A battery cell comprises: a casing assembly and a battery cell assembly, wherein the casing assembly comprises a casing and a first terminal arranged on the casing; and the battery cell assembly comprises an active-material coated portion and a conductive portion, the active-material coated portion being accommodated in the casing, the conductive portion being used for electrically connecting to the active-material coated portion and the first terminal, the first terminal being provided with an accommodating portion, and the conductive portion being at least partially accommodated in the accommodating portion.

Abstract: A battery cell, a battery, and an electrical device are disclosed. The battery cell comprises: a casing assembly, comprising a casing and a first pole, the first pole comprising a pole body and a first cover plate, the pole body being mounted in the casing, and the first cover plate being arranged on the pole body; and a cell assembly, comprising an active material coating portion and a conductive portion connected to the active material coating portion, the active material coating portion being accommodated in the casing, and the conductive portion being connected to the pole body by means of a first welding portion. The first welding portion is at least partially located on the side of the pole body away from the active material coating portion, and the first cover plate is used for shielding the first welding portion.

Abstract: The present disclosure relates to the field of battery technologies, and more particularly, to a battery cell, a battery, an electric apparatus, a welding method, and a welding device. The battery cell includes: an end cover having an injection hole defined thereon; and a seal sealingly connected to the injection hole. A first weld segment and a second weld segment are formed between the seal and the end cover. An annular weld seam of the seal is formed by enclosing with at least a part of the first weld segment and at least a part of the second weld segment together. The first weld segment is formed by continuous laser light. The second weld segment is formed by pulsed laser light.

Abstract: A battery cell includes a housing, an electrode assembly, and a sealing member. The housing is provided with an electrolyte injection hole for injecting an electrolyte. The electrode assembly is accommodated in the housing. The sealing member includes a main body portion, a transition portion surrounding an outer side of the main body portion, and a connecting portion surrounding an outer side of the transition portion. The connecting portion is located on a side of the housing back away from the electrode assembly, at least part of the main body portion protrudes from a first surface of the connecting portion facing the housing and is accommodated in the electrolyte injection hole, and the connecting portion is connected to the housing to seal the electrolyte injection hole.

Abstract: A battery end cover assembly includes an end cover having a liquid injection hole penetrating along a first direction. The liquid injection hole includes a first hole segment and a second hole segment divided along the first direction; the cross-sectional area of the first hole segment is larger than the cross-sectional area of the second hole segment; a stepped surface is formed between the first hole segment and the second hole segment; and the stepped surface includes a first inclined surface inclined toward the second hole segment along the first direction.