Continuous Electrode Laser Cutting for Faster, Cleaner Battery Edges
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Solution Overview
Problem
Current methods for cutting battery electrodes are inefficient, leading to increased cycle time, mechanical and thermal stress, and poor quality cuts, resulting in high scrap rates and manufacturing costs. Laser cutting with scanners is either too slow or energy-intensive, causing substrate deflection and quality fluctuations.
Innovation Solution
A method using a transport device with at least two units, where one unit is narrower than the battery electrode material, allowing for continuous processing with a laser cutting device, reducing mechanical and thermal stress, and incorporating sensor and suction devices for precise alignment and residue removal, enabling faster and more efficient cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If laser cutting with scanner is used, then cutting speed is improved, but cutting edge quality deteriorates due to larger spot diameter and energy input
Solution Approach 1:
The patent segments the cutting process into multiple passes: a first cutting pass creates an initial cut, and a second finishing pass refines the cut edge. This segmentation allows the first pass to remove material quickly (maintaining speed) while the second pass creates the precise final edge (improving quality), resolving the contradiction between cutting speed and cut edge quality
Solution Approach 2:
The first cutting pass performs preliminary material removal before the final cutting pass. By pre-processing the material to create an initial cut path and removing excess material, the system prepares the workpiece for the precision finishing pass, enabling both fast initial cutting and high-quality final edges
2Manufacturing precision
If mechanical separation is used, then contact-based cutting is achieved, but belt stoppage is required increasing cycle time
Solution Approach 1:
The patent replaces mechanical contact-based cutting with laser-based cutting. The laser cutting device can cut the electrode coil continuously during belt movement without requiring stoppage, eliminating the productivity loss associated with mechanical separation while maintaining cutting precision through controlled laser parameters and multi-pass cutting strategies
3Object-affected harmful factors
If laser separation is used, then non-contact cutting is achieved, but belt stoppage is required to avoid destruction increasing cycle time
Solution Approach 1:
The patent enables continuous laser cutting action during belt movement without stoppage. By optimizing laser parameters, using appropriate assist gases, and implementing multi-pass cutting strategies, the system maintains continuous cutting effectiveness throughout the material width while the belt moves continuously, eliminating idle time and maximizing productivity while preserving the non-contact advantage
4Area of stationary object
If cutting gap is increased for scanner coverage, then processing area is covered, but substrate deflection occurs causing quality fluctuation
Solution Approach 1:
The patent segments the cutting operation into multiple passes with smaller, overlapping cutting gaps. Instead of attempting to cover the entire width in a single pass with a large gap, the system makes multiple sequential passes with controlled, minimal gaps between them. This reduces substrate deflection in each pass while maintaining complete area coverage through the series of passes
Solution Approach 2:
The patent employs dynamic adjustment of cutting parameters during the process. The laser power, scanning speed, and gap positioning are dynamically optimized for each pass based on the remaining material thickness and accumulated heat, allowing the system to maintain consistent cut quality across the entire processing area while minimizing deflection effects
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method increases cycle time, reduces scrap, and improves cut edge quality, achieving a cost-effective and efficient production of battery electrodes with minimized rejects and operational costs.
Implementation Method 1
processing the continuous battery electrode material during a movement in the direction of movement by means of the at least one cutting device, wherein at least one processing step is carried out on the continuous battery electrode material
Data Source
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AI summary
The invention relates to a method for cutting a continuous battery electrode material (10) in order to produce battery electrodes (40) and to a battery electrode (40). According to the invention, a method is provided for cutting a continuous battery electrode material (10) in order to produce battery electrodes (40). Such a method has the following step: providing a continuous battery electrode material (10) and providing a transport device (17) which is designed to move the continuous battery electrode material (10) in a movement direction from a starting point to an end point over a machining region, wherein the transport device (17) comprises at least two transport units (16, 42). Additionally, at least one cutting device is provided in an additional step. The continuous battery electrode material (10) is then machined while being moved in the movement direction by means of the at least one cutting device such that at least one machining step is carried out on the continuous battery electrode material (10). At least one dimension of at least one of the at least two transport units (16, 42) is smaller than at least one dimension of the continuous battery electrode material (10) at least in one region.