CN104028439A - Method for drying lithium ion battery pole pieces - Google Patents

Abstract

The invention discloses a method for drying lithium ion battery pole pieces, and relates to the technical field of lithium ion batteries. The method comprises the following steps that the lithium ion battery pole pieces are placed in a vacuum drying box to be dried, the drying temperature is 80-120 DEG C, pressure is 0.02-0.05 MPa, and the drying time is 6-10 minutes; nitrogen is led into the drying box for 10-15 minutes, the drying box is vacuumized to 0.02-0.05 MPa, the step A and the step B are sequentially executed for three times, and the dried lithium ion battery pole pieces are obtained. Compared with the prior art, drying time is shorter, energy consumption is low, the dried pole pieces are good in softness, battery manufacturing is facilitated, and battery production efficiency can be conveniently improved.

Description

Electrodes of lithium-ion batteries drying means

Technical field

The present invention relates to lithium ion battery manufacture technology field, especially a kind of electrodes of lithium-ion batteries drying means.

Background technology

Pole piece has significant impact to the performance of lithium ion battery, it is the important step in pole piece treatment process that pole piece is dried, dry to electrodes of lithium-ion batteries is exactly pole piece surface-coated kind to be cut to black bisque be dried, and makes pole piece folding steel mesh that do not reveal after dry.The dry employing drum Hot-blast Heating of existing lithium battery pole slice, this kind of drying mode need to heat 4 to 5 hours, just can reach better drying effect, and it is not only consuming time, and power consumption is large.

Summary of the invention

The object of this invention is to provide a kind of electrodes of lithium-ion batteries drying means, it can solve existing drying lithium ion battery and have problem consuming time and that power consumption is large.

In order to address the above problem, the technical solution used in the present invention is: a kind of electrodes of lithium-ion batteries drying means comprises the following steps:

A, electrodes of lithium-ion batteries is put into vacuum drying chamber be dried, baking temperature is 80-120 DEG C, and pressure is 0.02-0.05MPa, and be 6-10 minute drying time;

B, in drying box, pass into nitrogen, keep 10-15 minute;

C, be evacuated to 0.02-0.05MPa, by steps A and step B repetitive cycling 3 times in order, obtain final product.

In the technical scheme of above-mentioned electrodes of lithium-ion batteries drying means, technical scheme can also be more specifically:

Further, the moisture of described nitrogen is less than 10ppm.

Owing to having adopted technique scheme, the present invention compared with prior art has following beneficial effect: drying time is short, consumes energy little, and after pole piece is dry, flexibility is good, is beneficial to battery and makes, and is conducive to improve battery production efficiency.

Detailed description of the invention

Below in conjunction with embodiment, the present invention is described in further detail:

Embodiment 1

The electrodes of lithium-ion batteries drying means of the present embodiment is as follows:

A, electrodes of lithium-ion batteries is put into vacuum drying chamber be dried, baking temperature is 80 DEG C, and pressure is 0.05MPa, and be 10 minutes drying time;

B, in drying box, pass into the nitrogen that moisture is less than 10ppm, keep 15 minutes nitrogen;

C, be evacuated to 0.05MPa, by steps A and step B repetitive cycling 3 times in order, obtain final product.

Embodiment 2

The electrodes of lithium-ion batteries drying means of the present embodiment is as follows:

A, electrodes of lithium-ion batteries is put into vacuum drying chamber be dried, baking temperature is 100 DEG C, and pressure is 0.04MPa, and be 8 minutes drying time;

B, in drying box, pass into the nitrogen that moisture is less than 10ppm, keep 12 minutes;

C, be evacuated to 0.04MPa, by steps A and step B repetitive cycling 3 times in order, obtain final product.

Embodiment 3

The electrodes of lithium-ion batteries drying means of the present embodiment is as follows:

A, electrodes of lithium-ion batteries is put into vacuum drying chamber be dried, baking temperature is 120 DEG C, and pressure is 0.02MPa, and be 6 minutes drying time;

B, in drying box, pass into the nitrogen that moisture is less than 10ppm, keep 10 minutes;

C, be evacuated to 0.02MPa, by steps A and step B repetitive cycling 3 times in order, obtain final product.

Claims (2)

1. an electrodes of lithium-ion batteries drying means, is characterized in that comprising the following steps:

A, electrodes of lithium-ion batteries is put into vacuum drying chamber be dried, baking temperature is 80-120 DEG C, and pressure is 0.02-0.05MPa, and be 6-10 minute drying time;

B, in drying box, pass into nitrogen, keep 10-15 minute;

C, be evacuated to 0.02-0.05MPa, by steps A and step B repetitive cycling 3 times in order, obtain final product.

2. electrodes of lithium-ion batteries drying means according to claim 1, is characterized in that: the moisture of described nitrogen is less than 10ppm.