Cylindrical battery anti-vibration electrode cover plate

Abstract

The invention discloses a cylindrical battery anti-vibration electrode cover plate, which comprises an electrode sheet, a stop frame arranged on one end of the electrode sheet, a cover plate arrangedon the stop frame, and an electrode assembly for integrally connecting the electrode sheet, the stop frame and the cover plate, wherein the electrode sheet, the cover plate and the electrode assemblyhave electrical conductivity, the electrode assembly comprises a connection body penetrating through the electrode sheet, the stop frame and the cover plate, and an electrode plate fixedly matched with the connection body and positioned on the cover plate, and an insulating layer is arranged between the electrode plate and the cover plate. According to the present invention, the defective productcaused by the inaccurate positioning of the electrode sheet and the forced vibration of the coil core in the finished battery core can be avoided, and the structure stability and the service life of the whole battery can be ensured.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, in particular to a cylindrical battery anti-vibration electrode cover plate of a cylindrical battery. Background technique [0002] At present, the cover plate (including the collector plate of the pole piece) and the tab of the winding core of the high-energy-density cylindrical lithium-ion battery are all used in the working mode of ultrasonic flattening of the tab and laser welding of the current collector. The problems of non-densification, over-kneading, welding deviation (deformation of the metal connection part of the collector plate), virtual welding and over-welding have serious hidden dangers to the performance of the battery internal resistance and magnification; in addition, due to the diameter and height consistency of the inner winding core of the battery There are differences. For winding cores with small diameter or small height, the winding cores tend to shake back and ...

AI Technical Summary

Problems solved by technology

[0002] At present, the cover plate (including the collector plate of the pole piece) and the tab of the winding core of the high-energy-density cylindrical lithium-ion battery are all used in the working mode of ultrasonic flattening of the tab and laser welding of the current collector. The problems of non-densification, over-kneading, welding deviation (deformation of the metal connection part of the collector plate), virtual welding and over-welding have serious hidden dangers to the performance of the battery internal resistance and magnification; in addition, due to the diameter and height consistency of the inner winding core of the battery There are differences. For winding cores with small diameter or small height, the winding cores tend to shake back and forth inside the battery case; and the working environment of the power battery is in a working state of frequent vibrations all the time; these phenomena are very easy to cause welding The desoldering of the parts, and the fracture of the bending part of the metal collector plate caused by excessive vibration amplitude and frequency

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