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.

Abstract: Disclosed are a case, a battery cell, a battery, and an electrical apparatus. The case includes a case body and a pressure relief structure, the case body accommodates an electrode assembly, and the pressure relief structure included a plurality of first pressure relief grooves disposed at intervals on the case body along the circumferential direction of the case body. The case body ruptures along the first pressure relief grooves when the pressure or temperature inside the case body reaches a threshold to release the pressure inside the case body. During a pressure relief process, even if one of the first pressure relief grooves is shielded, the case body can still rupture along other first pressure relief grooves, so as to ensure the normal pressure relief of the case body, reduce the risk of fire and explosion of the battery cell, and improve the safety of the battery cell.

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: Disclosed are a battery box, a battery cell, a battery, and a method and apparatus for preparing the battery box. The battery box includes: a first wall and a second wall, the first wall intersecting the second wall; and a pressure relief mechanism including a first portion and a second portion connected to each other, the first portion and the second portion being respectively arranged at the first wall and the second wall, wherein the first portion and/or the second portion are/is configured to be able to fracture, when an internal pressure of the battery box reaches a threshold, to relieve the internal pressure. Therefore, according to the battery box, the battery cell, the battery, and the method and apparatus for preparing the battery box of embodiments of the present application, thereby the performance of the pressure relief mechanism on the battery box is improved.