Abstract: This application discloses a housing, a battery cell, a battery, and an electric device, and pertains to the field of battery technologies. The housing has at least three edge portions intersecting at a same vertex. An indentation groove is provided on the housing, and the indentation groove intersects with at least two of the edge portions. Because the region near the edge portion of the housing has strong deformation resistance, the probability of abnormal cracking of the indentation groove due to creeping of the region in which the indentation groove is provided on the housing is reduced, thereby prolonging service life of the battery cell.

Abstract: Provided are an adapting member, a battery cell, a battery, and an electric apparatus, so as to improve performance of the battery cell. An adapter includes a first connecting portion, a second connecting portion, and an overload protection portion. The first connecting portion is configured to be electrically connected to an electrode terminal, the second connecting portion is configured to be electrically connected to a tab, the overload protection portion is disposed between the first connecting portion and the second connecting portion, and the second connecting portion includes a tab connecting surface for connecting the tab. The blocking member is disposed on a side of the adapter having the tab connecting surface and covers at least a portion of the overload protection portion, and the blocking member is configured to insulate and block direct electrical connection between the tab and the first connecting portion.

Abstract: This application provides a battery cell, a battery, and an electric apparatus. The battery cell includes a housing, an electrode terminal, and a current collector. The housing has a first wall and an accommodating cavity. The first wall has a first through hole enabling communication between the accommodating cavity and the outside of the housing. The electrode terminal includes a base and a connection portion connected to the base. The base is located on a side of the first wall back away from the accommodating cavity. At least part of the connection portion is located in the first through hole. The current collector includes a body portion and a protruding portion connected to the body portion. The protruding portion protrudes towards the first wall, and the protruding portion is configured to be connected to the connection portion.

Abstract: a battery cell includes an electrode assembly, a first electrode terminal, and a second electrode terminal. The electrode assembly includes a body portion, where a first tab, a second tab, and an auxiliary tab are led out of the body portion. The first tab and the auxiliary tab are both electrically connected to the first electrode terminal, and the second tab is electrically connected to the second electrode terminal. The first tab and the auxiliary tab are both electrically connected to the first electrode terminal to increase a current flow area of the tab electrically connected to the first electrode terminal.

Abstract: Embodiments of this application provide an end cover assembly, a battery cell, a battery, and an electric apparatus, where the end cover assembly includes an end cover and a pressure relief component, the end cover is provided with a recessed groove section recessed toward the inside of the battery cell, the pressure relief component is disposed within the groove section, and a top surface of the pressure relief component, facing away from the inside of the battery cell, has a distance to the groove bottom of the groove section that is less than or equal to the depth of the groove section. Thus, the pressure relief component does not protrude from the top surface of the end cover, thereby not occupying additional space in the height direction of the battery cell.

Abstract: Provided are battery cell, battery, and electric device. The battery cell includes a casing and a pressure relief mechanism. The casing is provided therein with an accommodating space configured to accommodate an electrode assembly, wherein the casing is provided with a mounting hole in communication with the accommodating space, and the mounting hole is provided with a first hole wall surface extending along a circumferential direction of the mounting hole. The pressure relief mechanism is arranged in the mounting hole, wherein an outer peripheral surface of the pressure relief mechanism is welded to the first hole wall surface. The casing is provided with a first annular groove, and the first annular groove surrounds an outer side of the first hole wall surface; and/or the pressure relief mechanism is provided with a second annular groove, and the first hole wall surface surrounds an outer side of the second annular groove.

Abstract: A battery cell includes a housing and a barrier member. The housing has an inner cavity, the housing has a first wall, and a weak portion is provided on the first wall. The barrier member is arranged in the inner cavity of the housing, and the barrier member is provided on at least part of the periphery of the weak portion.

Abstract: Embodiments of the present application provide a battery cell, a battery, and an electrical device. The battery cell includes a shell and a positive electrode plate. The melting point of the shell is N. The positive electrode plate is accommodated within the shell and includes a positive electrode active material, which includes lithium nickel cobalt manganese oxide. A weight of a nickel element in the lithium nickel cobalt manganese oxide is G1, and the sum of weights of a nickel element, a cobalt element, and a manganese element is G2. A value of G1/G2 is M. M and N meet: 0.1?M?0.65, N?(50M+500)° C.; or M and N meet: 0.65<M<1, N?(950M+500)° C. The present application reduces the risk of the melting of the shell during the thermal runaway of the battery cell and improve the safety.

Abstract: The present application provide a connection component, a battery cell, a battery, and an electric device. The connection component includes a body, a convex portion, a concave portion and a gap control portion, and the body includes a first surface and a second surface opposite to each other in a thickness direction thereof; and the gap control portion is configured to be when the associated connection component is stacked on the other connection component, said gap control portion is in contact with said the other connection component, so as to control a dimension of a gap D between the two connection components to be greater than 0.6H, wherein H is the height of the convex portion protruding from the first surface. According to the connection component provided by the present application, the gap between two adjacent connection components can be controlled when material is stuck.

Abstract: Provided are a battery cell, a battery, and an electric apparatus. The battery cell includes a housing and a shielding member. The housing has an inner cavity, the housing has a first wall, and the first wall is provided with a weak portion. The shielding member is disposed in the inner cavity, and the shielding member covers at least a portion of the weak portion in a thickness direction of the first wall. In the battery cell of this application, the shielding member covers at least a portion of the weak portion from the inside of the housing, thereby preventing direct contact between the electrolyte and the at least a portion of the weak portion, protecting the weak portion.

Abstract: Provided are a battery cell, a battery, and an electric apparatus. The battery cell includes: an electrode assembly including a body portion and a tab, where the body portion has a body end surface, and the tab is led out of the body end surface; and a housing having a first wall, where the first wall is provided with an electrolyte injection hole and an electrode terminal, and the tab is electrically connected to the electrode terminal. At least one surface of the tab is provided with a protection sheet, the protection sheet shielding at least part of a region, on the body portion, corresponding to the electrolyte injection hole.

Abstract: An embodiment of the present application provides a battery cell, a battery and an electrical device. The battery cell includes: a case, which is a hollow structure having a first opening end; an end cover assembly for covering the first opening end; an electrode assembly accommodated in the case; and an insulating guard layer disposed between the electrode assembly and the case to wrap at least part of the electrode assembly, wherein the insulating guard layer includes a main body portion and a protrusion structure, the main body portion has a second opening end facing the first opening end, the protrusion structure is connected to the second opening end and extends toward the end cover assembly, and the protrusion structure is used for connecting with the end cover assembly.

Abstract: An embodiment of the present application provides a battery cell, a battery and an electrical device. The battery cell includes: a case, which is a hollow structure having a first opening end; an end cover assembly for covering the first opening end; an electrode assembly accommodated in the case; and an insulating guard layer disposed between the electrode assembly and the case to wrap at least part of the electrode assembly, wherein the insulating guard layer includes a main body portion and a protrusion structure, the main body portion has a second opening end facing the first opening end, the protrusion structure is connected to the second opening end and extends toward the end cover assembly, and the protrusion structure is used for connecting with the end cover assembly.

Abstract: Provided are a connecting assembly, a battery cell, a battery, and a power consumption device. The connecting assembly is used for a battery cell. The connecting assembly includes: a connector, including a first connecting portion for connecting a tab of an electrode assembly, a second connecting portion for connecting an electrode terminal, and a third connecting portion for connecting the first connecting portion and the second connecting portion, where a fusing portion is formed between the first connecting portion and the third connecting portion, and the third connecting portion has a first surface facing the electrode assembly; a first insulator wrapping the fusing portion; and a second insulator covering at least a portion of the first surface, where the second insulator and the first insulator are integrally formed.

Abstract: A battery cell, a battery, and an electrical apparatus are provided. The battery cell includes a housing, a pressure relief mechanism and a protective member. The housing is provided with a stepped hole communicating with the interior of the housing, the stepped hole includes a first hole section and a second hole section which are arranged in a first direction, and the first hole section is located on the side of the second hole section facing away from the inside of the housing. The pressure relief mechanism and the protective member are respectively arranged in the second hole section and the first hole section, and the protective member covers at least a portion of the pressure relief mechanism.

Abstract: An insulator, used for a battery cell, includes: an insulator body, having a first surface and a second surface oppositely disposed in its thickness direction, the first surface facing an electrode assembly of the battery cell, and the second surface facing away from the electrode assembly; and a protrusion, formed on the first surface and used for abutting against the electrode assembly; wherein the protrusion is provided with an air vent, and the air vent runs through the protrusion in a direction intersecting with the thickness direction.

Abstract: Embodiments of the present application provide a battery cell, a battery, a power consumption device, and a battery cell manufacturing method and device. The battery cell includes: a shell, including a first wall provided with a medium injection hole; an electrode assembly, disposed inside the shell; and an insulating member, disposed between the first wall and the electrode assembly to insulate and isolate the first wall and the electrode assembly, where a guide structure is disposed on a side, facing the first wall, of the insulating member, and the guide structure is configured to guide a medium injected from the medium injection hole to an edge of the insulating member, so that the medium enters the interior of the battery cell from the edge of the insulating member.

Abstract: An end cover assembly includes an end cover and a pressure relief member. The pressure relief member is provided in the end cover, and the pressure relief member is provided with an indentation groove. The pressure relief member is configured to crack along the indentation groove to release internal pressure of a battery cell when internal pressure or temperature of the battery cell reaches a threshold. Hardness of the pressure relief member is lower than hardness of the end cover.

Abstract: An end cap assembly, a battery cell, a battery, an electrical device, and a method and device for manufacturing a battery cell are provided. The end cap assembly includes an end cap and a pressure relief mechanism. The pressure relief mechanism is connected to the end cap. The pressure relief mechanism is configured to: keep in a first pressure relief state when an internal pressure or temperature of the battery cell is greater than or equal to a first threshold and less than a second threshold, so as to release the internal pressure of the battery cell; and keep in a second pressure relief state when the internal pressure or temperature of the battery cell is greater than or equal to the second threshold, so as to release the internal pressure of the battery cell.

Abstract: A pressure relief device, a battery cell, a battery and an electrical device are provided. The pressure relief device has a pressure relief body and a pressure relief structure. The pressure relief structure has a first score groove, a second score groove and a third score groove provided on the pressure relief body. The first score groove and the third score groove are arranged at an interval, the first score groove and the third score groove both intersect with the second score groove, and the first score groove, the second score groove and the third score groove jointly define a pressure relief portion. The pressure relief portion is configured to split with the first score groove, the second score groove and the third score groove as boundaries when the pressure or temperature inside the battery cell reaches a threshold.