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Laser & Optoelectronics Progress, Volume. 59, Issue 18, 1810006(2022)

Defect Inspection of Lithium Battery Electrode Coating via Bright and Dark Field Scanning Imaging Techniques

Ting Xu1、*, Dahang Wan1, Zhiting Zou2, Yinfei Pan2, and Zongling Pan3
Author Affiliations
  • 1Hefei Mick Photoelectric Technology Co., Ltd., Hefei 230093, Anhui , China
  • 2School of Instrument Science and Opto-Electronics Engineering, Hefei University of Technology, Hefei 230009, Anhui , China
  • 3Anhui Institute of Metrology, Hefei 230051, Anhui , China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (9)
    Equations (6)
    References (13)
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    Figures & Tables(9)
    Schematic of imaging principle

    Fig. 1. Schematic of imaging principle

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    Structure diagram of imaging system

    Fig. 2. Structure diagram of imaging system

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    Physical picture of coating defect detection system for lithium battery electrode

    Fig. 3. Physical picture of coating defect detection system for lithium battery electrode

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    Distributed processing architecture of coating defect detection system for lithium battery electrode

    Fig. 4. Distributed processing architecture of coating defect detection system for lithium battery electrode

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    Image processing flow of coating defect detection for lithium battery electrode

    Fig. 5. Image processing flow of coating defect detection for lithium battery electrode

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    Multithread processing structure of battery electrode coating defect detection software

    Fig. 6. Multithread processing structure of battery electrode coating defect detection software

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    Detection effect of key defects in electrode coating of lithium battery

    Fig. 7. Detection effect of key defects in electrode coating of lithium battery

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    • Table 1. Performance evaluation results of coating defect detection system for lithium battery electrodes

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      Table 1. Performance evaluation results of coating defect detection system for lithium battery electrodes

      Performance parameterConclusion
      Detection resolution50 μm
      Detection width661 mm
      Detection efficiency56.3 m/s
      Data processing efficiency734 Mbit/s

    • Table 2. Accuracy experimental data of coating defect detection system for lithium battery electrodes

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      Table 2. Accuracy experimental data of coating defect detection system for lithium battery electrodes

      Experimentci，ci′ei，ei′ni
      i=1114， 1.0067， 0.84121
      i=2113， 0.9977， 0.84120
      i=3113， 0.99711， 1.3124
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    Ting Xu, Dahang Wan, Zhiting Zou, Yinfei Pan, Zongling Pan. Defect Inspection of Lithium Battery Electrode Coating via Bright and Dark Field Scanning Imaging Techniques[J]. Laser & Optoelectronics Progress, 2022, 59(18): 1810006

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    Paper Information

    Category: Image Processing

    Received: Jun. 30, 2021

    Accepted: Jul. 23, 2021

    Published Online: Aug. 29, 2022

    The Author Email: Xu Ting (1073572275@qq.com)

    DOI:10.3788/LOP202259.1810006

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology