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• W2897440247 abstract "One of the challenges during the lithium-ion battery manufacturing process is the sizing of electrodes with good cut surface quality. If the sizing process provides poor cut surface quality, internal short circuits in the cells and significant heat generation, which affect battery performance, occur. Currently, electrodes are sized using mechanical cutting by rotary knives and dies, which could result in delamination, burrs, and edge bending. The laser cutting of electrodes could improve the cut surface quality with high speed because of its high energy concentration, small heat affected zone, fast processing time, high precision, contact free process, and flexible range of laser power. However, without understanding the underlying physics, these advantages might not be fully utilized. Electrodes are composed of current collectors and active electrode materials, such as graphite-coated copper and lithium metal oxide-coated aluminium for anodes and cathodes respectively. To analyze the laser cutting of these electrodes, understanding the laser cutting for each material is an essential step. In this study, a 3D self-consistent laser cutting model is adopted and solved numerically for graphite laser cutting. This model includes multiple physical phenomena, such as multiple reflections, heat transfer, surface tension, recoil pressure, and phase changes. The effect of laser power and scanning speed on graphite during the laser cutting is analyzed. Furthermore, the influence of the sublimation of graphite during the laser cutting is observed.One of the challenges during the lithium-ion battery manufacturing process is the sizing of electrodes with good cut surface quality. If the sizing process provides poor cut surface quality, internal short circuits in the cells and significant heat generation, which affect battery performance, occur. Currently, electrodes are sized using mechanical cutting by rotary knives and dies, which could result in delamination, burrs, and edge bending. The laser cutting of electrodes could improve the cut surface quality with high speed because of its high energy concentration, small heat affected zone, fast processing time, high precision, contact free process, and flexible range of laser power. However, without understanding the underlying physics, these advantages might not be fully utilized. Electrodes are composed of current collectors and active electrode materials, such as graphite-coated copper and lithium metal oxide-coated aluminium for anodes and cathodes respectively. To analyze the laser cutting of the..." @default.
• W2897440247 created "2018-10-26" @default.
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• W2897440247 date "2011-01-01" @default.
• W2897440247 modified "2023-10-16" @default.
• W2897440247 title "Numerical studies of laser cutting on an active electrode material for lithium-ion batteries" @default.
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• W2897440247 doi "https://doi.org/10.2351/1.5062300" @default.
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