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A method for detecting foaming force of heat-sensitive adhesive tape

A detection method and technology of foaming force, applied in the field of lithium ion batteries, can solve the problems such as performance degradation of aluminum foil or copper foil, reduction of unit capacity after the service life of lithium ion battery, and detection methods failing to meet requirements, so as to improve unit capacity, The effect of improving the service life and reducing the economic cost

Active Publication Date: 2020-04-10
新丰杰力电工材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high-temperature oxidation of the surface of the aluminum foil or copper foil during laser cleaning, the performance of the aluminum foil or copper foil is reduced. Therefore, this method reduces the unit capacity of the lithium-ion battery after its service life.
[0005] Existing pressure-sensitive adhesive test methods usually refer to the national standard: GB / T 2792-1998, but this standard is usually used to test the adhesive performance of pressure-sensitive adhesive tapes under standard conditions, and cannot evaluate the adhesive performance under other temperature conditions
In particular, it is impossible to test the adhesive performance of thermal tapes at the foaming temperature
[0006] In addition, since the heat-sensitive tape is also involved in the change of the baking effect of the polymer slurry on the surface during the application process of the lithium-ion battery, and the polymer slurry has a certain inhibitory effect on the foaming effect of the heat-sensitive tape, the existing The detection method cannot meet the requirements

Method used

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  • A method for detecting foaming force of heat-sensitive adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Remove the release paper on one side of the double-sided tape, and stick the double-sided tape on the surface of the non-adhesive side of the thermal tape; then paste the prepared thermal tape with the double-sided tape on the aluminum foil The surface of the aluminum foil has a thickness of 8 μm; then place the side of the prepared aluminum foil away from the heat-sensitive adhesive tape on a heating table for baking, the baking temperature is 70 degrees, and the baking time is 20 seconds; the baked The side of the aluminum foil facing away from the heat-sensitive tape is pasted with ordinary tape to strengthen the strength of the aluminum foil; a tensile strength tester is used to test the tensile strength of the reinforced aluminum foil and the heat-sensitive tape pasted on its surface; the test speed is 3mm / min; fix the aluminum foil and the heat-sensitive tape with double-sided tape on both ends of the tensile strength tester, and the tensile strength tester separa...

Embodiment 2

[0069] Remove the release paper on one side of the double-sided tape, and stick the double-sided tape on the surface of the non-adhesive side of the thermal tape; then paste the prepared thermal tape with the double-sided tape on the copper The surface of the foil, the thickness of the copper foil is 12 μm; then place the side of the prepared copper foil away from the thermal tape on the heating table for baking, the baking temperature is divided into two stages, the heating temperature of the first stage is 80 degrees, the baking time is 20 seconds; the second stage heating temperature is 101 degrees, the baking time is 20 seconds; after baking, use a rubber roller with a mass of 2000g to paste one side at a rolling speed of 300mnm / min The process of pressing the heat-sensitive tape with double-sided tape on the surface of the copper foil to avoid air bubbles at the joint between the heat-sensitive tape and the copper foil; after that, stick the ordinary tape on the side of th...

Embodiment 3

[0071] Place the thermal tape in an environment with a temperature of 23°C±2°C and a relative humidity of 55%±5% for two hours, remove the release paper on one side of the double-sided tape, and paste the double-sided tape On the surface of the non-adhesive side of the heat-sensitive tape; then stick the heat-sensitive tape with the double-sided tape on the surface of the copper foil, and the thickness of the copper foil is 15 μm; Place the side away from the thermal tape on the heating table for baking. The baking temperature is divided into two stages. The heating temperature of the first stage is 100 degrees, and the baking time is 21 seconds; the heating temperature of the second stage is 102 degrees. , the baking time is 21 seconds; after baking, use a rubber roller with a mass of 2000g to press the heat-sensitive tape with double-sided tape on the surface of the copper foil at a rolling speed of 300mnm / min. Avoid the presence of air bubbles at the joint between the heat-...

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Abstract

The present invention provides a heat-sensitive adhesive tape adhesion detection method, which comprises: S10: removing release paper from the single side of a double-sided adhesive tape, and adheringthe double-sided adhesive tape onto the surface of the non-sticky side of a heat-sensitive adhesive tape; S20: adhering the prepared heat-sensitive adhesive tape with the double-sided adhesive tape adhered on the non-sticky side onto the surface of metal foil; S30: placing the metal foil side away from the heat-sensitive adhesive tape onto a heating table surface, and baking; S40: strengthening the metal foil baked in the step S30; and S50: testing the tensile strength of the strengthened metal foil and the heat-sensitive adhesive tape adhered on the surface of the metal foil by using a tensile strength tester. According to the present invention, with the detection method, the important parameters of the lithium battery preparation process can be accurately obtained in the case of the lowcost, the economic cost in the lithium battery production can be substantially reduced, and the unit capacity of the lithium-ion battery can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a method for detecting the foaming force of a heat-sensitive adhesive tape. Background technique [0002] Lithium-ion batteries have the advantages of high working voltage, high energy density (light weight), long cycle life, no memory effect, and no pollution. They also have the advantages of safety, reliability, and fast charging and discharging. They have become the main power supply of various electronic products. . Since lithium-ion batteries are green, environmentally friendly and non-polluting secondary batteries, they meet the major development needs of energy and environmental protection in various countries today, and their usage in all walks of life is increasing rapidly. At present, secondary lithium-ion batteries are not only widely used in digital electronic products such as mobile phones, notebook computers, and MP3, but also in some high-power batte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/04
Inventor 何俊李国烜王薇肖剑
Owner 新丰杰力电工材料有限公司
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