The presence of pits, R-angle injuries, hard printing, and other defects on the end face of lithium battery shells severely affects the production safety and usage safety of lithium battery products. In this study, we propose an effective defect-detection model, called Sim-YOLOv5s, for lithium battery steel shells.
Wu et al. used a structured light method based on multiple exposures to reconstruct the 3D shape of a lithium battery and then converted the abnormal part of the 3D point cloud into a 2D image for lithium battery surface defect detection by a highly greyscale transformation with an accuracy of 97.17% .
The detection of lithium battery shell defects is an important aspect of lithium battery production. The presence of pits, R-angle injuries, hard printing, and other defects on the end face of lithium battery shells severely affects the production safety and usage safety of lithium battery products.
According to his research result, the average missed detection rate of six defects was 6.21% and the average false detection rate was 3.91%. Their research focused on the detection of surface defects on cylindrical lithium batteries but not on the end faces.
In this study, we propose an effective defect-detection model, called Sim-YOLOv5s, for lithium battery steel shells. In this model, we propose a fast spatial pooling pyramid structure, SimSPPF, to speed up the model and embed the attention mechanism convolutional block attention module in the backbone.
The lithium battery defect-detection equipment was used to collect 700 images containing defects on the end face of the battery case, including ‘pit’, ‘R-angle injury’, and ‘hard printing’. The 700 images were randomly divided into 3 groups:567 for model training, 63 for result validation and 70 for model testing.
Dendrites and Pits: Untangling the Complex Behavior of Lithium …
This work provides a detailed explanation of (1) when dendrite nucleation occurs, (2) how those dendrites evolve as a function of time, (3) when surface pitting occurs during Li...
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To Be or Not to Be: Dendrite Growth Mechanism Adjacent to Pits …
6 · The challenge of dendrite growth is a formidable obstacle that leads to short circuits when charging lithium (Li)-metal batteries. Implementing patterns with various pit structures on …
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(PDF) Automatic Visual Pit Detection System for Bottom Surface …
The pit on the bottom metal surface is one of the important indicators of cylindrical lithium battery surface defect detection. There are many complex factors in the detection of pit:...
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Critical Role of Pits in Suppressing Li Dendrites Revealed by …
Dendrite growth and surface pitting are critical factors hindering the development of ultra-high energy density rechargeable lithium battery. However, the …
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Dendrites and Pits: Untangling the Complex Behavior …
Li metal is considered to be the most promising anode for next-generation batteries due to its high energy d. of 3840 mAh g-1. However, the extreme reactivity of the Li surface can induce parasitic reactions with …
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To Be or Not to Be: Dendrite Growth Mechanism Adjacent to Pits …
6 · The challenge of dendrite growth is a formidable obstacle that leads to short circuits when charging lithium (Li)-metal batteries. Implementing patterns with various pit structures on Li metal proves to be an effective strategy to alleviate dendrite growth. Nonetheless, the growth mechanism of Li dendrites near pits is still under debate, making it difficult to accurately …
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Surface Reconditioning of Lithium Metal Electrodes by Laser …
1 Introduction. Lithium-ion batteries (LIBs) have become an indispensable cornerstone of modern society, serving as electrochemical energy storage devices that power manifold technologies, most notably electric vehicles. [] Three decades of continuous technological improvements by materials research and engineering [] have advanced LIBs …
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[PDF] Automatic Visual Pit Detection System for Bottom Surface of ...
The pit on the bottom metal surface is one of the important indicators of cylindrical lithium battery surface defect detection. There are many complex factors in the detection of pit: non-uniform …
Learn More
Critical Role of Pits in Suppressing Li Dendrites Revealed by …
Dendrite growth and surface pitting are critical factors hindering the development of ultra-high energy density rechargeable lithium battery. However, the mechanism of dendrite growth …
Learn More
Dendrites and Pits: Untangling the Complex Behavior …
This work provides a detailed explanation of (1) when dendrite nucleation occurs, (2) how those dendrites evolve as a function of time, (3) when surface pitting occurs during Li...
Learn More
Sim-YOLOv5s: A method for detecting defects on the end face of lithium ...
The presence of pits, R-angle injuries, hard printing, and other defects on the end face of lithium battery shells severely affects the production safety and usage safety of lithium battery products. In this study, we propose an effective defect-detection model, called Sim-YOLOv5s, for lithium battery steel shells. In this model, we propose a ...
Learn More
(PDF) Automatic Visual Pit Detection System for …
The pit on the bottom metal surface is one of the important indicators of cylindrical lithium battery surface defect detection. There are many complex factors in the detection of pit:...
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A Perspective on the Requirements of Ni‐rich Cathode Surface ...
The current research trend in traditional lithium-ion batteries (LIBs) surface modification focuses on addressing mechanical cracking issues while also enhancing or maintaining the physical barrier concept employed in traditional coating methods. Novel research has emerged in the form of self-healing coating mechanisms, which involve the application of …
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Advancements in the development of nanomaterials for lithium …
The origins of the lithium-ion battery can be traced back to the 1970s, when the intercalation process of layered transition metal di-chalcogenides was demonstrated through electrolysis by Rao et al. [15].This laid the groundwork for the development of the first rechargeable lithium-ion batteries, which were commercialized in the early 1990s by Sony.
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Critical Role of Pits in Suppressing Li Dendrites Revealed by …
Dendrite growth and surface pitting are critical factors hindering the development of ultra-high energy density rechargeable lithium battery. However, the mechanism of dendrite growth promoted by pits on the surface of lithium metal remains unclear. In this study, we propose a combination of continuum mechanics simulations and develop an in ...
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Sim-YOLOv5s: A method for detecting defects on the end face of lithium ...
Feng Xueyong studied the circumferential surface of the battery shell in his master''s thesis "Recognition and Classification method of Surface Defects of Cylindrical Lithium Battery Steel Shell Based on Deep Learning", which introduces six types of circumferential surface defects of battery shell, including pits, cracks, stains, hard printing, wire drawing, and …
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[PDF] Automatic Visual Pit Detection System for Bottom Surface …
The pit on the bottom metal surface is one of the important indicators of cylindrical lithium battery surface defect detection. There are many complex factors in the detection of pit: non-uniform illumination of images, uneven reflection of the metal surface, low surface finishing, stains, rust and scratches. To solve these problems, a method ...
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Nucleation of Pitting and Evolution of Stripping on Lithium-Metal ...
The stripping reaction of lithium (Li) will greatly impact the cyclability and safety of Li-metal batteries. However, Li pits'' nucleation and growth, the origin of uneven stripping, are still poorly understood. In this study, we analyze the nucleation mechanism of Li pits and their morphology evolution with a large population and electrode ...
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Dendrites and Pits: Untangling the Complex Behavior of Lithium …
Li metal is considered to be the most promising anode for next-generation batteries due to its high energy d. of 3840 mAh g-1. However, the extreme reactivity of the Li surface can induce parasitic reactions with solvents, contamination, and shuttled active species in the electrolyte, reducing the performance of batteries employing ...
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Automatic Visual Pit Detection System for Bottom Surface of …
Abstract: The pit on the bottom metal surface is one of the important indicators of cylindrical lithium battery surface defect detection. There are many complex factors in the detection of pit: …
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Lithium plating on the anode for lithium-ion batteries during …
Lithium-ion batteries (LIBs), with the distinct advantages of high energy density and excellent cycle performance, have been widely applied in various fields, such as transportation, electronic products, and energy storage systems, after undergoing nearly 30 years of development since their commercialization in 1991 [1, 2].LIBs have played crucial roles in …
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Li Alloys in All Solid-State Lithium Batteries: A Review of ...
All solid-state lithium batteries (ASSLBs) overcome the safety concerns associated with traditional lithium-ion batteries and ensure the safe utilization of high-energy-density electrodes, particularly Li metal anodes with ultrahigh specific capacities. However, the practical implementation of ASSLBs is limited by the instability of the interface between the …
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Automatic Visual Pit Detection System for Bottom Surface of …
Abstract: The pit on the bottom metal surface is one of the important indicators of cylindrical lithium battery surface defect detection. There are many complex factors in the detection of pit: non-uniform illumination of images, uneven reflection of the metal surface, low surface finishing, stains, rust and scratches. To solve these problems ...
Learn More
Research on detection algorithm of lithium battery surface …
In this paper, the visual detection algorithm is studied to detect the defects such as pits, rust marks and broken skin on the surface of lithium battery, specifically to design the imaging experimental platform of lithium battery; use different lighting schemes to design different battery positioning and extraction algorithms; use Hough ...
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Nucleation of Pitting and Evolution of Stripping on Lithium-Metal ...
The stripping reaction of lithium (Li) will greatly impact the cyclability and safety of Li-metal batteries. However, Li pits'' nucleation and growth, the origin of uneven stripping, are still …
Learn More
Dynamic observation of dendrite growth on lithium metal anode …
Lithium metal is considered one of the most promising anode materials for application in next-generation batteries. However, despite decades of research, practical application of lithium metal ...
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Research on detection algorithm of lithium battery surface …
The visual detection algorithm is studied to detect the defects such as pits, rust marks and broken skin on the surface of lithium battery, specifically to design the imaging experimental platform of lithiumattery, and studies its vision detection algorithm. In the production process of lithium battery, the quality inspection requirements of lithium battery are very high. …
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