Electrode Laser Etching Layout for Debris and Heat Zone Control
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Solution Overview
Problem
Existing electrode manufacturing processes in secondary batteries face issues with coating quality due to sliding or mismatch at the edge of the coating area, leading to performance and quality deterioration.
Innovation Solution
A laser etching device and system that includes a laser unit, blowing unit, and suction unit, arranged to etch active material portions and manage foreign substances, with the laser unit, blowing unit, and suction unit disposed in a direction traversing the electrode sheet's movement, to improve coating quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a laser unit is used to etch the active material portion, then coating quality is improved and foreign substances are removed, but heat-affected zone is generated and foreign substances may diffuse to adjacent areas
Solution Approach 1:
The patent extracts and removes foreign substances generated during laser etching by introducing a blowing unit that blows away foreign substances from the etching area, preventing their diffusion to adjacent active material portions and thereby maintaining coating quality while eliminating the harmful effect of foreign substance contamination
Solution Approach 2:
The patent introduces air flow as an intermediary medium between the laser unit and the electrode sheet. The blowing unit delivers controlled air flow that acts as a mediator to transport foreign substances away from the etching zone, solving the problem of foreign substance diffusion without interfering with the laser etching process itself
2Manufacturing precision
If laser etching is performed on the active material portion, then edge quality is improved, but heat-affected zone narrows the processing margin
Solution Approach 1:
The patent applies preliminary cooling action by introducing cool air flow from the blowing unit before and during the laser etching process. This preliminary cooling reduces the heat-affected zone width by continuously removing heat from the processing area, allowing precise edge quality improvement while maintaining smaller thermal impact on surrounding materials
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 solution effectively prevents the diffusion of foreign substances and enhances coating quality by defining a narrow heat-affected zone, thereby improving the performance and quality of the electrode.
Implementation Method 1
a laser unit configured to irradiate laser onto the active material portion
Implementation Method 2
a blowing unit configured to blow foreign substances generated by the etching of the active material portion toward the non-coating portion
Implementation Method 3
a suction unit disposed at an opposite side of the blowing unit with the laser unit therebetween to suction the foreign substances
Data Source
AI summary
A laser etching device, which etches an active material portion on an electrode sheet including the active material portion and a non-coating portion, according to an embodiment of the present invention includes a laser unit configured to irradiate laser onto the active material portion, a blowing unit configured to blow foreign substances generated by the etching of the active material portion toward the non-coating portion, and a suction unit disposed at an opposite side of the blowing unit with the laser unit therebetween to suction the foreign substances, wherein the laser unit, the blowing unit, and the suction unit are disposed in a direction traversing a moving direction of the electrode sheet.