This work investigates the quality aspects of laser cutting of Li-ion electrodes when a green fibre laser source (λ = 532 nm, τ = 1 ns) is used rather than the more traditional infrared (IR) fibre laser source (λ = 1,064 nm, τ = 250 ns). The processing conditions were investigated to reveal the technological feasibility zones. Clearance width was studied within
Customer ServiceThe laser cutting electrode technology not only reduces the loss rate of electrode materials but also achieves efficient and environmentally friendly electrode cutting in a low-carbon manner. The excellent structures produced by laser precision fabrication enhance not only the structural
Customer ServiceLaser processes for cutting, annealing, structuring, and printing of battery materials have a great potential in order to minimize the fabrication costs and to increase the electrochemical performance and operational lifetime of lithium
Customer ServiceNanophotonics. Laser processes for cutting, annealing, structuring, and printing of battery materials have a great potential in order to minimize the fabrication costs and to increase the electrochemical performance and operational lifetime of lithium-ion cells.
Customer ServiceLaser cutting of battery electrodes is one such technology, where the non-contact nature of pulsed laser irradiation avoids costs and technical difficulties associated with tool wear in mechanical blanking [5]. Previous studies have shown that pulsed laser cutting can result in lower costs than those associated with mechanical blanking after as little as two years of high
Customer ServiceThis paper presents investigations on the influence of a laser cutting process on the cutting edge quality of copper and aluminum based electrode materials. The different
Customer ServiceWithin this programme the cutting of electrodes for Li-Ion cells by lasers is an issue, too. This paper provides a comparative study on cutting materials relevant for Li-Ion cells with beam...
Customer ServiceIn this work, the laser cutting of electrodes as one of the core processes in large-format battery production is addressed. A comprehensive literature review on the boundary conditions and the relevant quality characteristics of the separation process is presented.
Customer ServiceThis paper explores remote laser cutting techniques for anode electrode materials in battery cells for e-mobility usage, assessing high brilliance laser performance in different operational modes and setups.
Customer ServiceLithium iron phosphate battery electrodes are subject to continuous-wave and pulsed laser irradiation with laser specifications systematically varied over twelve discrete parameter groups. Analysis of the resulting cuts and incisions with an optical profiler and scanning electron microscope gives insight into the dominant physical phenomena influencing laser
Customer ServiceThe laser cutting electrode technology not only reduces the loss rate of electrode materials but also achieves efficient and environmentally friendly electrode cutting in a low-carbon manner. The excellent structures produced by laser precision fabrication enhance not only the structural stability of the electrode but also its performance
Customer ServiceThis paper presents investigations on the influence of a laser cutting process on the cutting edge quality of copper and aluminum based electrode materials. The different process parameters are examined and the main influencing factors on the quality are determined to ensure an optimized processing rate.
Customer ServiceInvestigating underlying physical phenomena with numerical analysis provides significant advantages to fully utilize the remote laser cutting of electrodes for lithium-ion
Customer ServiceThe ultrashort laser system equipped with burst mode capability can be used to optimize the laser notching and cutting of electrodes in the production line of LIBs. Haung et al. 35 conducted a study on the effects of burst mode on laser cutting productivity and quality of anode and Cu foil. The bursts consisted of ps pulses with short interval
Customer ServiceLaser processes for cutting, annealing, structuring, and printing of battery materials have a great potential in order to minimize the fabrication costs and to increase the electrochemical performance and operational lifetime of lithium-ion cells.
Customer ServiceIn addition, the coating technology and the process development have a strong impact on the quality, the performance and the safety of the assembled battery cells. 3. Laser Cutting of the Electrodes Mechanical cutting processes, such as die cutting, are state of the art for tailoring of electrode foils. Drawbacks of these processes are the high
Customer ServiceOur findings indicate that, laser-cut electrodes exhibit superior kerf quality and battery performance compared to that of mechanically cut electrodes when the laser energy
Customer ServiceLaser cutting can be applied to separators and electrodes. However the current focus relates to electrode cutting. For pouch cell designs, complete electrodes must be cut at high speeds that match the coating speed, which is in the range of 25–50 m min −1 [1].
Customer ServiceFig. 1 shows the expected increase in required demand for battery capacity by the year 2030 according to Zubi et al. [4]. 55th CIRP Conference on Manufacturing Systems Current advances on laser drying of electrodes for lithium-ion battery cells Daniel Neba,*, Stanislav Kimb, Henning Clevera, Benjamin Dorna, Achim Kampkera aChair of Production
Customer ServiceLaser processes for cutting, annealing, structuring, and printing of battery materials have a great potential in order to minimize the fabrication costs and to increase the
Customer ServiceIn this work, the laser cutting of electrodes as one of the core processes in large-format battery production is addressed. A comprehensive literature review on the
Customer ServiceLaser cutting of lithium-ion battery electrodes has been shown to be a viable alternative to mechanical blanking for some specific electrode types, yielding similar cut quality and throughput but
Customer ServiceInvestigating underlying physical phenomena with numerical analysis provides significant advantages to fully utilize the remote laser cutting of electrodes for lithium-ion batteries. In this paper, a mathematical model of three-dimensional self-consistent remote laser cutting is presented for anode (graphite-coated copper) of lithium-ion batteries.
Customer ServiceMicro structuring of battery electrodes with pulsed laser radiation substantially increases the performance of lithium-ion batteries. For process design and monitoring, determining the resulting hole diameters and depths is essential. This study presents an automated, model-based approach for the geometry characterization of laser-drilled structures
Customer ServiceLaser cutting can be applied to separators and electrodes. However the current focus relates to electrode cutting. For pouch cell designs, complete electrodes must be cut at
Customer ServiceThis paper explores remote laser cutting techniques for anode electrode materials in battery cells for e-mobility usage, assessing high brilliance laser performance in different operational modes and setups.
Customer ServiceWithin this programme the cutting of electrodes for Li-Ion cells by lasers is an issue, too. This paper provides a comparative study on cutting materials relevant for Li-Ion cells with beam...
Customer ServiceThe significant performance improvements by laser structuring were already observed in large-format pouch cells manufactured on academic pilot production lines [11], [12].Also, laser radiation is applied in various other processes during battery production such as drying of electrode coatings [16], cutting of electrode material [17] and welding of current
Customer ServiceOur findings indicate that, laser-cut electrodes exhibit superior kerf quality and battery performance compared to that of mechanically cut electrodes when the laser energy density is less than 2500 J cm −2, and the mechanism of performance improvement by optimized laser cutting is comparatively discussed with traditional mechanical cutting
Customer ServiceThis work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. Laser processes for cutting, annealing, structuring, and printing of battery materials have a great potential in order to minimize the fabrication costs and to increase the electrochemical performance and operational lifetime of lithium-ion cells.
Laser cutting of electrodes requires laser scanning speeds of 1–4 m s −1, an average laser power of 200–400 W, and laser repetition rates of up to 20–50 MHz [71, 72] to cut 1–2 large areal electrodes suitable for pouch cell geometries per second. This type of high-speed cutting is necessary due to the electrode coating speed (25–50 m min −1).
With the electrode fabricated by laser ablation or modification, the 3D and high aspect ratio battery was completed. The laser-engineering structured electrode provides a significant improvement of cycle retention, and an increased power density and energy density on cell level could be achieved.
Summary and Future Work The presented work discussed experiments of laser cutting of electrode materials for the production of lithium ion cells. The experiments focused on the cutting edge quality. The cutting edge quality was investigated by evaluating the geometrical parameters in macroscopic cross sections.
High speed laser cuttings of electrodes for the lithium-ion battery using single mode fiber lasers have also been investigated by Patwa et al. . They illustrated the achievable highest cutting speed, the effect of the focus beam and the number of cutting passes.
Investigating underlying physical phenomena with numerical analysis provides significant advantages to fully utilize the remote laser cutting of electrodes for lithium-ion batteries. In this paper, a mathematical model of three-dimensional self-consistent remote laser cutting is presented for anode (graphite-coated copper) of lithium-ion batteries.
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