Method for preparing lithium-ion battery core

Abstract

The invention discloses a method for preparing a lithium-ion battery core, comprising the following steps of 1) preparing a positive plate, a negative plate and diaphragm paper; and 2) preparing an electric core by the positive plate, the negative plate and the diaphragm paper, and arranging the positive plate, the negative plate and the diaphragm paper sequentially between two layers of teryleneresin films, carrying out hot-composing to obtain a complex consisting of the positive plate, the diaphragm paper and the negative plate; preparing a monomer electric core by two or more complexes andpreparing the electric core by connecting the monomer electric cores in parallel or in series. The lithium-iron battery core prepared by the method can effectively control the irregular expansion ofthe lithium-iron battery core and lead the appearance of the lithium-iron battery to be smooth and regular.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a preparation method of a lithium ion battery cell. Background technique [0002] Lithium-ion batteries have been more and more widely used in people's daily life and defense fields, and their production technology has been developing and advancing, and the improvement of materials is the most. However, there are relatively few improvements in the preparation process of lithium-ion batteries. Lithium-ion batteries are generally prepared according to the following method: firstly prepare the positive electrode sheet and the negative electrode sheet, and then insert a separator between the positive and negative electrode sheets, press the positive electrode sheet, separator, and negative electrode sheet The order of arrangement is superimposed or wound into a single cell, and the single cells are connected in parallel or in series to form a cell. There is also an operation of hot-...

AI Technical Summary

Problems solved by technology

Using the above methods to produce batteries, although the work efficiency is relatively high, it is difficult to permanently eliminate the irregular deformation of the battery as a whole; at the same time, due to the uneven force and inconsistent thermal conductivity during hot pressing, there may be damage to the battery. locally fatal injury

In addition, in the above existing methods, the battery is generally hot-pressed and shaped after the battery liquid injection is completed. At this time, the pressure and temperature on the battery have a significant impact on the extrusion loss, thermal volatilization loss and variation of the electrolyte in the battery. Larger impact, therefore, will have a certain impact on the overall performance of the battery

Images