Manufacturing method of power lithium ion battery

Abstract

The invention provides a method for manufacturing a power lithium ion battery, which includes providing a flat substrate; forming an insulating layer with a predetermined pattern on the flat substrate; forming a conductive layer with a predetermined pattern on the insulating layer with a predetermined pattern; providing a carbon-containing material; forming a carbon-containing material layer with a predetermined pattern on the conductive layer with a predetermined pattern, then pressing and drying, the conductive layer and the carbon-containing compound layer together form a negative electrode; forming a separator with a predetermined pattern on the negative electrode; providing a lithium salt mixture; forming a lithium salt mixture layer with a predetermined pattern on the separator; forming a metal layer with a predetermined pattern on the lithium salt mixture layer, then pressing and drying, the lithium salt mixture layer and the metal layer together form a positive electrode; forming a positive electrode on the positive electrode Predetermined pattern of insulating layer; according to the predetermined number of layers of battery cells, determine the number of times to repeat steps 3-10, and then repeat steps 3-10 in sequence; step 12, add electrolyte to the diaphragm.

Description

technical field [0001] The invention relates to a manufacturing process of a battery, in particular to a manufacturing method of a power lithium ion battery. Background technique [0002] Lithium-ion battery is a secondary battery (rechargeable battery) that mainly relies on the movement of lithium ions between the positive and negative electrodes to work. During the charging and discharging process, Li+ intercalates and deintercalates back and forth between the two electrodes: when charging the battery, Li+ is deintercalated from the positive electrode, inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true when discharging. Lithium-ion batteries have high energy density, high average output voltage, low self-discharge, and no memory effect. The wide working temperature range is -20℃~60℃. Excellent cycle performance, fast charging and discharging, charging efficiency up to 100%, and high ou...

AI Technical Summary

Problems solved by technology

[0015] However, the current lithium-ion battery production adopts the traditional roll-shaped process, and the uniformity and yield rate are not ideal, which needs to be improved