Electrode Laser Etching With Moisture Cooling for Uniform Layer Ends
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Solution Overview
Problem
Existing electrode manufacturing methods face challenges in uniformly forming the active material layer, leading to sliding and mismatching portions, and the laser etching method causes active material deterioration due to heat.
Innovation Solution
A method involving laminating an active material layer on a current collector and irradiating a laser beam after supplying moisture to the layer to prevent sliding and mismatching, and minimize heat-induced deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If laser etching method is used to uniformly form the active material layer end, then sliding portion and mismatching portion are prevented, but active material is deteriorated by heat of laser beam
Solution Approach 1:
A cooling gas (nitrogen or air) is introduced as an intermediary medium between the laser beam and the active material layer. The cooling gas absorbs and dissipates the heat generated by laser irradiation, preventing thermal deterioration of the active material while maintaining the laser's ability to uniformly etch the active material layer end and prevent sliding/mismatching portions
Solution Approach 2:
The physical state of the environment around the active material layer is changed by introducing cooling gas. This parameter change (from ambient air to controlled cooling gas flow) modifies the thermal characteristics during laser processing, enabling precise heat management that prevents material deterioration while maintaining etching effectiveness
2Ease of manufacture
If conventional coating method is used to apply active material slurry, then manufacturing process is simple, but uniform surface cannot be formed at distal end due to drag lines and islands
Solution Approach 1:
The mechanical coating process (slurry application and drying) is supplemented or replaced by laser etching to achieve uniform surface formation. The laser beam precisely removes excess material at the distal end, eliminating drag lines and islands that form during conventional coating, while the overall manufacturing process remains relatively simple
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
The method achieves uniform active material layer formation without sliding or mismatching, and reduces active material deterioration by using moisture during laser etching.
Implementation Method 1
removing a portion of the active material layer by irradiating a laser beam on the surface of the active material layer
Implementation Method 2
before irradiating the laser beam to the active material layer in step (b), a process of supplying moisture to the active material layer is performed
Data Source
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AI summary
The present invention provides a method for manufacturing an electrode, comprising the steps of (a) laminating an active material layer on the surface of the current collector; and (b) removing a portion of the active material layer by irradiating a laser beam on the surface of the active material layer, wherein before irradiating the laser beam to the active material layer in step (b), a process of supplying moisture to the active material layer is performed, and a system for manufacturing an electrode, which is used in the above method.