Battery cell, battery and electric equipment

Abstract

The invention discloses a battery cell, a battery and electric equipment. The battery cell comprises an electrode assembly and insulation paste, the electrode assembly is provided with a tab, and the tab covers the end face of the electrode assembly; the insulation paste comprises a first area and a second area, the first area is attached to the peripheral wall of the electrode assembly, the second area is attached to the tab, and at least one first notch is formed in the second area. According to the embodiment of the invention, the first notch is formed in the second area, so that the stress generated by the insulating glue in the attaching process can be released, the second area can be flatly attached to the tab, the possibility that the tab is separated under the working conditions of vibration and the like in the process that the battery cell enters a shell or is used is reduced, the safety performance of the battery cell is improved, and after the battery cell enters the shell, the reliability of the battery cell is improved. The contact area between the tab and an electrolyte can be increased, so that the infiltration of the electrolyte on a battery cell is facilitated; after the battery is assembled and formed, in the charging and discharging process of the battery, the first gap of the second area is beneficial to heat dissipation of the tabs of the battery cell, and the safety performance of the battery is improved.

Description

technical field [0001] The present application relates to the technical field of batteries, in particular to a battery cell, a battery and an electric device. Background technique [0002] This section provides background information related to the present disclosure only and is not necessarily prior art. [0003] In order to solve serious problems such as the global energy crisis, environmental pollution, climate change, and low-carbon economy, lithium batteries are developing rapidly, especially in the fields of electric vehicles, electric bicycles and other vehicles and energy storage. [0004] In related technologies, cylindrical power batteries generally use bare cells with full tabs at both ends of the positive and negative tabs. A short circuit occurs in contact with the shell, and the two ends of the bare cell are often covered with glue. However, although the existing encapsulation process can solve the problem of short circuit between the tab and the case, its re...

AI Technical Summary

Problems solved by technology

However, although the existing encapsulation process can solve the problem of short circuit between the tab and the case, its reliability is poor. There is still a risk of short circuit between the tabs at both ends of the bare cell and the case. Moreover, the bare cell After the two ends are covered with glue, it is easy to cause the problem of difficult electrolyte infiltration at both ends of the battery cell. In addition, it will also cause the problem of poor heat dissipation during the charging and discharging process of the battery.

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