Cells for wound lithium batteries and wound lithium batteries

Abstract

A battery core of a wound lithium battery, the battery core includes a positive electrode sheet, a separator and a negative electrode sheet stacked and wound in sequence, the winding end of the positive electrode sheet integrally forms a positive ear, and the winding of the negative electrode sheet The end is integrally formed with negative tabs, and the positive tabs and negative tabs are respectively formed on the upper and lower surfaces of the battery core and located on both sides of the battery core. The electric core is easy to manufacture and assemble into a battery, and has wide and thin integrated tabs, thereby obtaining a relatively large current conduction area, high-rate discharge performance and good heat dissipation performance.

Description

technical field [0001] The invention relates to a lithium battery, in particular to a battery core of a winding lithium battery and a winding lithium battery with the battery core. Background technique [0002] Lithium batteries are widely used in many fields, especially mobile phones and electronics industries, due to their outstanding characteristics such as high working voltage, large specific energy, and low self-discharge. The structure, performance and manufacturing process of lithium batteries have also been continuously improved. With the continuous development of lithium battery applications, the automotive industry is gradually using lithium batteries to provide power. At present, the structure of lithium batteries mainly includes laminated type and winding type. The present invention relates to a winding lithium battery. [0003] At present, the battery core of the wound lithium battery includes a positive electrode sheet, a negative electrode sheet, a separato...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of subsequent processing and complex assembly operations caused by the tabs being located on the same side after the integrated tabs are wound, and the poor heat dissipation performance and high-rate discharge performance of the battery after the tabs are punched, one aspect of the present invention is to provide a winding type Lithium battery cell, which includes a positive electrode sheet, a separator and a negative electrode sheet stacked and wound in sequence, the winding end of the positive electrode sheet integrally forms a positive electrode ear, and the winding end of the negative electrode sheet integrally forms a negative electrode ear , wherein, the positive tab and the negative tab are respectively formed on the upper and lower surfaces of the battery and are located on both sides of the battery

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