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Pin hole flaw detection system for isolated film and detection method thereof

A defect detection and isolation film technology, applied in the direction of optical test defects/defects, etc., can solve problems such as difficulty in distinguishing pinhole defects and colloidal defects, and achieve the effect of avoiding explosion and reducing the probability of false detection.

Active Publication Date: 2014-04-02
BENQ MATERIALS +1
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Problems solved by technology

[0006] In view of this, the object of the present invention is to provide a pinhole defect detection system and method for detecting isolation films, so as to solve the problem of the difficulty in distinguishing pinhole defects from colloidal particle defects and stretch mark defects in the prior art. technical issues

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  • Pin hole flaw detection system for isolated film and detection method thereof
  • Pin hole flaw detection system for isolated film and detection method thereof
  • Pin hole flaw detection system for isolated film and detection method thereof

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Embodiment Construction

[0022] In order to have a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed descriptions are provided in conjunction with the embodiments.

[0023] Please refer to figure 2 , figure 2 It is a schematic diagram of a pinhole defect detection system 200 for an isolation film according to an embodiment of the present invention. The detection system 200 includes a light source 21 , a first polarizer component 22 , a second polarizer component 24 , an optical camera device 25 and a control module 26 . The optical camera device 25 is used to capture the detection image of the detection area corresponding to the point to be measured on the isolation film 23 to be detected that includes the point to be tested; the light source 21 provides light that travels toward the optical camera device 25; the first polarizing assembly 22 has a second An optical axis, which can be a polarizer or a metal grating, is located ...

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Abstract

The invention provides a pin hole flaw detection system for detecting isolated film, which comprises the following steps: an optical camera device on an isolated film to be detected containing points to be measured captures detection images of the points to be measured; light source provides light moves towards the optical camera device; a first polarization component is arranged between the light source and the optical camera device; a second polarization component is arranged between the first polarization component and the optical camera device; a control module is coupled with the optical camera device for processing detection images; wherein, the isolated film to be detected is arranged between the first polarization component and the second polarization component, and the included angle between a first optical axis of the first polarization component and a second optical axis of the second polarization component is 90 degree for capturing detection images; the pin hole flaw detection system of the present invention can effectively detect pin hole flaws on the isolated film, thereby minimizing false detection probability and avoiding blast caused by battery short circuit.

Description

technical field [0001] The present invention relates to an automatic optical inspection (Automated Optical Inspection, AOI) system and detection method, in particular to a detection system and detection method for pinhole defects on an isolation film. Background technique [0002] Separator is a kind of polymer thin film, which is used in lithium batteries. Its main function is to isolate the positive and negative electrodes in the battery, so as to prevent the short circuit caused by direct contact between the positive and negative electrodes. However, the isolation membrane needs to be microporous so that the ions in the electrolyte can flow freely to generate current. Therefore, it is necessary to use process technology to make the isolation membrane microporous. [0003] Currently in the market, the production methods of isolation films can be divided into wet process and dry process. The wet process mainly adds low-molecular-weight paraffin to polypropylene and polyeth...

Claims

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Application Information

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IPC IPC(8): G01N21/88
Inventor 吴佳霖丘锦勋高志远陈威仰
Owner BENQ MATERIALS
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