A kind of drying method of lithium-ion battery cell

Abstract

The invention relates to the field of battery manufacturing and particularly relates to a drying method of a lithium-ion battery electric core. The method comprises the following steps that: the electric core to be dried is placed in a closed cavity; constant temperature of the cavity is set; multiple times of vacuum pumping and vacuum relieving are cyclingly carried out; and a cycling air flow is formed in the closed cavity and the electric core is dried. When the lithium-ion battery electric core adopts the drying method provided by the invention, cycling of air pumping and air changing is introduced in the process of vacuum drying, and water content in the lithium-ion battery electric core can be reduced in a relatively short period of time, and operation processes are simplified and work load of an operator is reduced.

Description

technical field

[0001] The invention relates to the field of battery manufacturing, in particular to a method for drying lithium-ion battery cells. Background technique

[0002] Since the advent of lithium-ion batteries in the 1990s, they have developed very rapidly in more than ten years. With the continuous expansion of the application range of lithium-ion batteries, the requirements for their application conditions are becoming more and more stringent. Among them, the control of water content is an important process control parameter that affects the performance of lithium batteries. How to reduce the water content in the battery and shorten the time spent in the battery drying process is a problem to be improved in the battery manufacturing process.

[0003] In order to solve this problem, the traditional battery drying method is: under the condition of maintaining a certain temperature, extracting vacuum drying to remove moisture. The moisture in the electrode sheet ...