Determination technology for encapsulation quality of aluminum plastic film of polymer lithium-ion battery

A lithium-ion battery and polymer technology, which is applied in the manufacture of secondary batteries, non-aqueous electrolyte batteries, and electrolyte batteries, can solve problems affecting the quality of polymer lithium-ion batteries and the inability to effectively control the quality of aluminum-plastic film packaging, etc., to achieve The effect of high accuracy, simple method and convenient operation

Inactive Publication Date: 2018-10-02
SHENZHEN GPC ENERGY GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims to solve the problem that the detection method in the prior art cannot effectively control the packaging quality of the same type of aluminum-plastic film of the same manufacturer but dif

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] Example 1

[0022] Take a sponge with the same shape as the polymer lithium ion battery cell, and fix the positive and negative ears on the sponge at the same positions as the positive and negative ears on the polymer lithium ion battery cell; used to pack the polymer The aluminum-plastic film of the lithium-ion battery cell is from Japan DNP company. Another batch of aluminum-plastic film used to package the polymer lithium-ion battery cell is taken. According to the heat-sealing process parameters of the polymer lithium-ion battery, It is made of an aluminum plastic film bag that matches the sponge body and has an electrolyte injection port on the top. The heat sealing process parameters of the polymer lithium ion battery are: heat sealing pressure 0.25 Mpa, heat sealing temperature 180°C, heat sealing time 3.5 S; Put the sponge in an aluminum-plastic film bag, and inject 1.5mol / L sodium chloride electrolyte along the electrolyte injection port in the aluminum-plastic fi...

Example Embodiment

[0023] Example 2

[0024] Take a sponge with the same shape as the polymer lithium ion battery cell, and fix the positive and negative ears on the sponge at the same positions as the positive and negative ears on the polymer lithium ion battery cell; used to pack the polymer The aluminum-plastic film of the lithium-ion battery cell is from Japan DNP company. Another batch of aluminum-plastic film used to package the polymer lithium-ion battery cell is taken. According to the heat-sealing process parameters of the polymer lithium-ion battery, It is made of an aluminum plastic film bag that matches the sponge body and has an electrolyte injection port at the top. The heat sealing process parameters of the polymer lithium ion battery are: packaging pressure 0.2Mpa, packaging temperature 175°C, heat sealing time 3S; Put the sponge in an aluminum-plastic film bag, and inject 1mol / L of sodium chloride electrolyte along the electrolyte injection port in the aluminum-plastic film bag. Th...

Example Embodiment

[0025] Example 3

[0026] The implementation process and results of Example 3 are exactly the same as those of Example 2. The difference is that the heat sealing process parameters are adjusted in the negative direction as follows: heat sealing temperature is reduced by 10°C, heat sealing pressure is reduced by 0.07Mpa, and heat sealing time is shortened 0.3S, after the heat sealing process parameters are adjusted, it can ensure that the aluminum plastic film has qualified heat sealing quality.

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PUM

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Abstract

The invention provides a determination technology for encapsulation quality of aluminum plastic film of a polymer lithium-ion battery. The other batch of aluminum plastic film which is about to be applied to the polymer lithium-ion battery is prepared into a simulation battery according to heat-sealing technological parameters of the aluminum plastic film of the previous batch, then the simulationbattery is subjected to extrusion testing and simulation testing, and according to testing results, the heat-sealing quality of the aluminum plastic film is judged comprehensively; then, according tothe heat-sealing quality, the heat-sealing technological parameters are pre-adjusted to guarantee that the aluminum plastic film has qualified encapsulation quality, the aim of controlling the encapsulation quality of the aluminum plastic film of the polymer lithium-ion battery is achieved accordingly, and the problem is solved that the difference of the encapsulation quality of the aluminum plastic film of different batches exists, and accordingly the quality of the polymer lithium-ion battery is influenced. According to the determination technology, the heat-sealing technological parametersare adjusted according to the extrusion testing results and insulation performance testing results, and the method is easy and quick to use and high in accuracy.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery manufacturing, in particular to a process for judging the quality of polymer lithium-ion battery aluminum-plastic film packaging. Background technique [0002] Polymer lithium-ion batteries need to be packaged with aluminum-plastic film after the tabs are aligned. The packaging principle of the aluminum-plastic film is to use external heating to make the heat-sealing material in the heat-sealing part of the aluminum-plastic film into a viscous state. With the help of packaging equipment The mold pressure makes the upper and lower layers of heat-sealing materials and tabs fused together, and maintains a certain strength and good sealing performance after cooling. Therefore, the quality of heat-sealing will directly affect the service life of the packaging. Heat-sealing temperature, time and pressure are the basic packaging process parameters. After the aluminum-plastic film used for pol...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M10/0525
CPCH01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 左春洲王勇军李国敏
Owner SHENZHEN GPC ENERGY GRP CO LTD
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