Intermittent Laser Scanning for Electrode Plate Cutting
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Solution Overview
Problem
Existing cutting methods for electrode plates, such as the one-stroke and on-the-fly laser cutting methods, face challenges in maintaining cutting quality due to dependence on conveyance speed, leading to issues like scorching or burr formation, which degrade the quality of secondary batteries and hinder production efficiency.
Innovation Solution
A cutting device and method that employs intermittent laser scanning with a control unit to form continuous unit cutting sections, including a main line section and a bent section, to ensure accurate cutting and prevent misalignment, thereby maintaining cutting quality even at increased conveyance speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the one-stroke laser cutting method is used to ensure continuous cutting without fail, then cutting reliability is improved, but laser light output control becomes highly complicated and difficult to make due to strong dependence on conveyance speed
Solution Approach 1:
The patent divides the continuous cutting process into multiple discrete laser light output sections (first section, second section, third section) along the cutting line. Each section can be independently controlled with different output intensities, allowing the system to maintain reliable continuous cutting while simplifying control programming through modular segment management rather than continuous adjustment.
Solution Approach 2:
The patent implements distinct laser light output parameter settings for different cutting sections: a first output intensity for the first section, a reduced second output intensity for the second section (to prevent scorching at lower conveyance speeds), and a third output intensity for the third section. This parameter segmentation allows reliable cutting while avoiding the complexity of continuous parameter adjustment.
2Device complexity
If the on-the-fly laser cutting method is used to simplify laser light output control, then control program complexity is reduced, but cutting quality deteriorates due to high dependence on conveyance speed causing burrs and discontinuous cut sections
Solution Approach 1:
The patent segments the cutting process into multiple controlled laser output sections with specific geometric patterns (including bent sections that extend from end portions of main line sections). This segmentation allows each section to be optimized for quality while maintaining overall simplicity in control programming through standardized segment templates.
Solution Approach 2:
The patent incorporates bent sections that extend from the end portions of main line sections in advance before the cut is completed. This preliminary action ensures that even if conveyance speed varies or sections become discontinuous, the bent sections provide overlap or connection zones that prevent burr formation and maintain cutting quality without requiring complex real-time control adjustments.
3Productivity
If conveyance speed is increased to improve production lead time and throughput, then productivity is improved, but cutting quality deteriorates with more likely occurrence of burrs and discontinuous cut sections
Solution Approach 1:
The patent designs unit cutting sections with bent sections that extend from end portions of main line sections in advance. These bent sections create overlap zones or connection regions that ensure continuous cutting even at high conveyance speeds, preventing burrs and discontinuities before they can occur. This preliminary geometric design allows high-speed cutting while maintaining quality.
Solution Approach 2:
The patent applies different laser light output parameters to different cutting sections, with the second section using reduced intensity to prevent scorching at various conveyance speeds. This parameter adaptation allows the system to maintain cutting quality across a range of conveyance speeds, enabling higher productivity without quality deterioration.
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 suppresses the degradation of cutting quality, improving production lead time and throughput while maintaining the integrity of secondary battery electrodes by ensuring continuous and accurate cutting sections, even when adjacent sections are misaligned.
Implementation Method 1
a laser scanning unit that scans the continuous body with laser light
Data Source
AI summary
A cutting device includes: a conveyance unit that conveys a continuous body of a plurality of electrode plates; a laser scanning unit that scans the continuous body with laser light; and a control unit that controls the laser scanning unit. The control unit controls a laser scanning unit so as to scan the continuous body while performing intermit irradiation with laser light, thereby forming a plurality of unit cutting sections that are continuous and dividing the continuous body into a first portion and a second portion. The unit cutting sections have a main line section extending along the boundary of the first portion and the second portion, and a bent section that bends and extends from an end of the main line section.