Electrode Plate Alignment Control Using Width Deviation Compensation
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Solution Overview
Problem
The challenge in battery manufacturing is ensuring accurate alignment of cathode and anode electrode plates to prevent misalignment, which can lead to safety issues and reduced yield rates in electrochemical cells.
Innovation Solution
A method and device that calculate width deviation values for both anode and cathode electrode plates using sensor and camera data to adjust the feed position and compensate for misalignment, maintaining a preset distance between the plates and ensuring consistent widths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional stacking method without precise measurement is used, then manufacturing process is simple, but misalignment of electrode plates occurs leading to safety problems and low yield rate
Solution Approach 1:
The patent applies preliminary action by measuring the cut hole positions and calculating width deviation values before the stacking process. The feed position of the cathode electrode plate is adjusted in advance based on these pre-calculated deviation values, preventing misalignment before it occurs rather than correcting it after stacking.
Solution Approach 2:
The patent implements feedback by using sensors to detect cut hole positions, calculating width deviation values from these measurements, and using the calculated values to adjust the feed position of subsequent electrode plates. This closed-loop feedback system continuously monitors and corrects alignment deviations during the stacking process.
2Manufacturing precision
If feed position is not adjusted according to width deviation, then stacking process is fast, but cathode electrode plate extends beyond anode electrode plate cut marks causing misalignment
Solution Approach 1:
The system performs preliminary measurement of cut hole positions and pre-calculates the required feed position adjustments before stacking begins. This allows the stacking process to proceed at high speed while maintaining precision, as the adjustment values are already determined and ready to be applied.
Solution Approach 2:
The patent changes the feed position parameter dynamically based on calculated width deviation values. By adjusting this key parameter in real-time according to measured deviations, the system maintains precise alignment without requiring slower, more cautious stacking operations.
3Manufacturing precision
If width of cathode electrode plate is not compensated, then production process is simple, but widths of cathode electrode plates are inconsistent leading to poor misalignment
Solution Approach 1:
The patent uses feedback by measuring the actual widths of cathode electrode plates, calculating width deviation values from these measurements, and using the deviation values to compensate and adjust the widths. This ensures consistent widths across all plates while maintaining a relatively simple compensation mechanism based on calculated adjustments.
Data Source
AI summary
The present application discloses a method and device for controlling misalignment of electrode plates, electrode plates, an electrochemical cell, and a battery. The method includes: acquiring cut hole position information of an anode electrode plate, and calculating a first width deviation value corresponding to the anode electrode plate according to the cut hole position information and a calibration width of the anode electrode plate; acquiring tab position information of a cathode electrode plate, and calculating a second width deviation value corresponding to the cathode electrode plate according to the tab position information and a calibration width of the cathode electrode plate; and when the anode electrode plate and the cathode electrode plate are stacked, adjusting a feed position of the cathode electrode plate according to the first width deviation value, and compensating for a cut width of the cathode electrode plate according to the second width deviation value.