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Method for testing coating stripping force of slurry

A test method and peel force technology, applied in the testing field of slurry coating peel force, can solve problems such as inability to accurately characterize the adhesive properties of slurry

Pending Publication Date: 2022-07-15
HUIZHOU LIWINON NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The obtained peel force data is greatly affected by the surface tension of the foil and the thickness of the foil, and cannot accurately characterize the adhesive performance of the slurry after drying

Method used

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  • Method for testing coating stripping force of slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like figure 1 As shown, a method for testing the peeling force of slurry coating comprises the following steps:

[0030] Step 1, prepare a glass substrate 1, put the glass substrate 1 into an ultrasonic cleaner for cleaning, add deionized water to the ultrasonic cleaner, clean at a frequency of 30kHz for 15min, and then place the glass substrate in an oven at a temperature of 80°C. Bake for 50 minutes, and then evenly coat the slurry on the glass substrate 1;

[0031] Step 2, use a blast dryer to dry the slurry coating 2 at a temperature of 80°C, and the drying time is 30min;

[0032] Step 3, paste the adhesive paper 3 on the slurry coating 2, and then use the pressure roller to roll the adhesive paper 3. The pressure of the pressure roller to roll the adhesive paper 3 is 20N, and the The number of times is 3, so that the adhesive paper 3 is firmly bonded to the slurry coating 2;

[0033] Step 4: Fix one end of the glass substrate 1 to the lower end 4 of the tension ...

Embodiment 2

[0042] like figure 1 As shown, a method for testing the peeling force of slurry coating, comprising the following steps:

[0043] Step 1, prepare a glass substrate 1, put the glass substrate 1 into an ultrasonic cleaner for cleaning, add deionized water to the ultrasonic cleaner, clean at a frequency of 35kHz for 20min, and then place the glass substrate in an oven at a temperature of 90°C. Bake for 55 minutes, and then evenly coat the slurry on the glass substrate 1;

[0044] Step 2, use a blast dryer to dry the slurry coating 2 at a temperature of 90°C, and the drying time is 35min;

[0045] Step 3, paste the adhesive paper 3 on the slurry coating 2, and then use the pressure roller to roll the adhesive paper 3. The pressure of the pressure roller to roll the adhesive paper 3 is 21N, and the The number of times is 4, so that the adhesive paper 3 is firmly bonded to the slurry coating 2;

[0046]Step 4: Fix one end of the glass substrate 1 to the lower end 4 of the tension...

Embodiment 3

[0049] like figure 1 As shown, a method for testing the peeling force of slurry coating comprises the following steps:

[0050] Step 1, prepare a glass substrate 1, put the glass substrate 1 into an ultrasonic cleaner for cleaning, add deionized water to the ultrasonic cleaner, clean at a frequency of 39kHz for 25min, and then place the glass substrate in an oven at a temperature of 95°C. Bake for 58 minutes, and then evenly coat the slurry on the glass substrate 1;

[0051] Step 2, use a blast dryer to dry the slurry coating 2 at a temperature of 100°C, and the drying time is 38min;

[0052] Step 3, paste the adhesive paper 3 on the slurry coating 2, then use the pressure roller to roll the adhesive paper 3, the pressure of the pressure roller to roll the adhesive paper 3 is 22N, and the The number of times is 5 times, so that the adhesive paper 3 is firmly bonded to the slurry coating 2;

[0053] Step 4: Fix one end of the glass substrate 1 to the lower end 4 of the tensi...

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Abstract

The invention relates to the technical field of battery slurry, in particular to a method for testing coating stripping force of slurry, which comprises the following steps: step 1, preparing a glass substrate, and then uniformly coating the glass substrate with the slurry; 2, drying the slurry coating formed in the step 1 by using a drying machine; step 3, sticking gummed paper on the slurry coating, and then rolling the gummed paper by using a pressing wheel, so that the gummed paper is firmly stuck on the slurry coating; 4, one end of the glass substrate is fixed to the lower end of a tensile machine, and the free end of the gummed paper is fixed to the upper end of the tensile machine; and step 5, starting the tensile machine to enable the gummed paper to peel off the slurry coating so as to complete the peeling force test. According to the testing method, the glass substrate is used as a standard substance for testing, so that the testing by using a foil material is avoided, and the adhesive property of the dried slurry can be more accurately characterized.

Description

technical field [0001] The invention relates to the technical field of battery slurry, in particular to a method for testing the peeling force of slurry coating. Background technique [0002] Lithium-ion batteries are made of positive and negative electrode sheets and separators that are assembled into naked cells by winding or laminating, which are then loaded into the casing and injected with electrolyte. The positive and negative pole pieces are obtained by homogenizing and coating the active material, binder and conductive agent, and the function of the binder is to bond the active material, the conductive agent and the foil together. The peel force test of the pole piece is a way to detect the adhesion force of the pole piece, and the peel force is an index to test and evaluate the performance of the adhesive. [0003] The existing test method for the peeling force of slurry coating is to use a tensile machine to test the peeling force by 180° after coating the slurry ...

Claims

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Application Information

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IPC IPC(8): G01N19/04G01N1/44G01N1/28
CPCG01N19/04G01N1/44G01N1/286
Inventor 吕智海覃志华文晓平黄少南郑明清杨山其他发明人请求不公开姓名
Owner HUIZHOU LIWINON NEW ENERGY TECH CO LTD