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Method for detecting service life of tensioned dry method uniaxial tension diaphragm

A detection method and unidirectional stretching technology, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., can solve problems such as increasing uncertainty, and achieve a simple detection device and simple detection operation process. , the effect of high efficiency

Inactive Publication Date: 2016-02-24
SHENZHEN SENIOR TECH MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current actual production process, there is no clear method to determine how long the stretched large film needs to be placed before it can be put into finished product cutting, which greatly increases the uncertainty in the actual production process

Method used

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  • Method for detecting service life of tensioned dry method uniaxial tension diaphragm
  • Method for detecting service life of tensioned dry method uniaxial tension diaphragm
  • Method for detecting service life of tensioned dry method uniaxial tension diaphragm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example

[0032] a. Take a sample of the 16μ product that has just been stretched, and the length of the pulled out diaphragm is about 2m; use the cutting equipment to cut the sample strip longitudinally along the stretching direction, the width of the sample strip is 15mm, and the number is 10;

[0033] b. Take a sample and use the Xinsansi tensile testing machine to clamp both sides of the sample with clamps. The length of the sample between the clamps is 100mm.

[0034] c. Set the stretching length to 5mm, and maintain this stretching position, and record the change of stretching tension during this process by the computer connected to the tensile testing machine, and the recording time is 30min;

[0035] d. Take the splines in step a every 6 hours, and repeat steps b and c;

[0036] e. Obtain 6 tension curves and compare the results until such figure 1 As shown, the two tension curves basically coincide.

[0037] Depend on figure 1 It can be seen that the stress relaxation curves...

Embodiment 2

[0039] The following are specific implementation cases of this method:

[0040] a. Take a layer sample of the 32μ product that has just been stretched, and the length of the pulled out diaphragm is about 3m; use a sample cutting device to cut the sample along the longitudinal direction of the stretching direction, the width of the sample is 10mm, and the number is 5;

[0041] b. Take a sample and use the Xinsansi tensile testing machine to clamp both sides of the sample with clamps. The length of the sample between the clamps is 150mm.

[0042] c. Set the stretching length to 5mm, and maintain this stretching position, and record the change of stretching tension during this process by the computer connected to the tensile testing machine, and the recording time is 10 minutes;

[0043] d. Take the splines in step a every 0.5h, and repeat steps b and c;

[0044] e. Obtain 6 tension curves until the two tension curves basically coincide.

Embodiment 3

[0046] The following are specific implementation cases of this method:

[0047] a. Take a sample of the 50μ product that has just been stretched, and the length of the pulled-out diaphragm is about 2m; use the cutting equipment to cut the sample along the longitudinal direction of the stretching direction, the width of the sample is 20mm, and the number is 10;

[0048] b. Take a sample and use the Xinsansi tensile testing machine to clamp both sides of the sample with clamps. The length of the sample between the clamps is 200mm.

[0049] c. Set the stretching length to 5mm, and maintain this stretching position, and record the change of stretching tension during this process by the computer connected to the tensile testing machine, and the recording time is 60min;

[0050] d. Take the splines in step a every 12 hours, and repeat steps b and c;

[0051] e. Obtain 6 tension curves until the two tension curves basically coincide.

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Abstract

The invention mainly aims at providing a method for detecting the service life of a tensioned dry method uniaxial tension diaphragm. Bases are provided for the actual production process, and waves, tippets and other later changes in the diaphragm production process are reduced. A tensile testing machine is adopted. According to the method for detecting the service life of the tensioned dry method uniaxial tension diaphragm, the tensile testing machine is adopted, the bases are provided for the actual production process, and the situation that waves, tippets and other later changes are caused in the diaphragm production process due to the fact that placing time is insufficient is avoided.

Description

technical field [0001] The invention belongs to the field of preparation of dry-process uniaxially stretched diaphragms for lithium batteries, and particularly relates to a method for detecting the service life of dry-process uniaxially stretched diaphragms after being stretched Background technique [0002] Lithium batteries have the characteristics of high open circuit voltage, high energy ratio and large capacity, and have always been the power batteries favored by new energy vehicle manufacturers. Since electric vehicles require high-power electric energy, in actual use, thousands of batteries are often used in series to form a battery pack to ensure energy supply. According to relevant industry reports, a pure electric vehicle needs 40 to 50 kilograms of cathode materials and electrolyte, which is about 10,000 times the consumption of a single mobile phone battery. Therefore, the rise of the electric vehicle industry will undoubtedly bring dozens of times of demand gro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N3/06H01M2/14H01M50/403
CPCG01N3/066G01N3/08H01M50/403Y02E60/10
Inventor 田如辉刘孟权王玉捷张龙陈良
Owner SHENZHEN SENIOR TECH MATERIAL
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