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An online real-time monitoring system and monitoring method for thermal shrinkage rate of lithium battery diaphragm

A technology for thermal shrinkage and real-time monitoring, which is applied in the online real-time monitoring of the thermal shrinkage rate of lithium-ion battery separators, and the field of online real-time monitoring of the thermal shrinkage rate of battery separators. Thermal shrinkage rate and other issues, to achieve the effect of convenient installation, overcoming time-consuming and laborious, and facilitating the quality of battery separators

Active Publication Date: 2018-06-19
河南惠强新能源材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method takes a long time and the detection speed is slow. At the same time, because the tested sample is only a partial sample of a certain batch of diaphragm products, it is only of reference significance for the diaphragm samples produced on the entire production line, but it cannot explain the quality of the batch. Actual thermal shrinkage of the secondary diaphragm sample

Method used

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  • An online real-time monitoring system and monitoring method for thermal shrinkage rate of lithium battery diaphragm
  • An online real-time monitoring system and monitoring method for thermal shrinkage rate of lithium battery diaphragm
  • An online real-time monitoring system and monitoring method for thermal shrinkage rate of lithium battery diaphragm

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Experimental program
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Effect test

Embodiment 1

[0029] like figure 1 As shown, the online real-time monitoring thermal shrinkage rate system of the lithium-ion battery diaphragm provided by the present invention includes an infrared heating device 3 and a stress testing device 4 successively set up at the exit 1 of the stretching film forming of the diaphragm production line, and the infrared heating device 3 and the stress testing device The height of the detection port of 4 is respectively equal to the membrane surface of the outlet membrane (battery diaphragm) 2;

[0030] The infrared heating device and the stress testing device are respectively connected to the display device, and the display device has a built-in control system, and the corresponding test parameters of the infrared heating device and the stress testing device can be controlled and adjusted through corresponding operations on the display device;

[0031] The lithium-ion battery separator produced by the separator production line is a PE separator, a PP ...

Embodiment 2

[0035] Taking the production of PE separators for lithium-ion batteries as an example, the method for real-time monitoring of the thermal shrinkage rate of the separator in the online real-time monitoring system for the thermal shrinkage rate of lithium-ion battery separators in Example 1 is adopted, and the specific process is as follows.

[0036] (1) First, according to the type of lithium-ion electronic separator to be produced, TMA (thermomechanical analysis) test is performed on the finished lithium-ion battery separator (PE separator used in this example) to obtain the corresponding relationship between the thermal shrinkage rate and temperature of the separator .

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Abstract

The invention belongs to the technical field of the production of lithium ion battery diaphragms, in particular relates to an online real-time monitoring system for monitoring a heat shrinkage rate of a lithium ion battery diaphragm and a method utilizing the same to online monitor the heat shrinkage rate of the battery diaphragm in real time. The system comprises an infrared heating device and a stress testing device successively arranged at a diaphragm stretching forming outlet of a diaphragm production line, wherein the height of a detection opening of each of the infrared heating device and the stress testing device is respectively equal to that of a diaphragm surface of the outlet; and the lithium ion battery diaphragm produced by the diaphragm production line is a PE diaphragm, a PP diaphragm or a PP / PE / PP diaphragm. The online real-time monitoring system for monitoring the heat shrinkage rate of the lithium ion battery diaphragm is relatively high in integration degree, convenient to install, rapid and intuitive in result displaying when the heat shrinkage rate of the lithium ion battery diaphragm is monitored online, capable of overcoming the traditional detection defects such as time and labor waste and convenient for adjusting the quality of the battery diaphragm in time. Therefore, the application prospect in the field of the production of the lithium ion battery diaphragm is relatively good.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery diaphragm production, and in particular relates to an online real-time monitoring system for the thermal shrinkage rate of the lithium-ion battery diaphragm and a method for using the system to monitor the thermal shrinkage rate of the battery diaphragm on-line and in real time. Background technique [0002] The lithium-ion battery separator is one of the key components in the internal structure of the lithium-ion battery. The performance of the separator determines the interface structure and internal resistance of the battery, which directly affects the capacity, cycle and safety performance of the battery. A separator with excellent performance plays an important role in improving the overall performance of the battery. [0003] The main function of the lithium-ion battery separator is to separate the positive and negative electrodes of the battery to prevent the short circuit cause...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/16
CPCG01N25/16
Inventor 王红兵马兴玉肖正武
Owner 河南惠强新能源材料科技股份有限公司
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