Battery Cell Stacking Station With Optical Alignment Feedback
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Solution Overview
Problem
The challenge in battery cell production is achieving precise positioning of flat elements like monocells, electrodes, or separator portions during stacking, while maintaining high production speed. Existing discontinuous pick-and-place methods are limited by their slow operation.
Innovation Solution
A stacking station equipped with an optical measuring device that detects position deviations and angle offsets of flat elements on a conveyor device. This allows for real-time corrections during the stacking process, ensuring accurate centering of elements without compromising production speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If discontinuous pick-and-place method is used to position flat elements centre to centre, then positioning accuracy is improved, but production speed deteriorates
Solution Approach 1:
The patent implements continuous conveying of flat elements through the stacking station, eliminating the stop-start nature of pick-and-place methods. The conveyor device maintains constant motion while positioning elements centre-to-centre through controlled delivery timing, thereby preserving both high positioning accuracy and continuous production flow.
Solution Approach 2:
The patent incorporates measuring devices that detect the actual position of flat elements during conveying. This position information is fed back to the control system, which adjusts the delivery timing of subsequent elements to maintain centre-to-centre alignment. This closed-loop control enables accurate positioning without interrupting the continuous conveying process.
2Ease of operation
If alignment is performed at the edges of separators using an alignment surface, then positioning is simplified, but tolerance utilization deteriorates
Solution Approach 1:
The patent replaces mechanical edge alignment with an optical/measuring-based positioning system. Measuring devices detect the actual position of each flat element, and the control system calculates the optimal delivery timing to achieve centre-to-centre stacking. This substitution enables better tolerance utilization while maintaining operational simplicity through automated control.
3Device complexity
If flat elements are conveyed without continuous holding, then conveying is simplified, but positioning accuracy deteriorates due to uncontrolled movements
Solution Approach 1:
The patent employs dynamic holding and releasing of flat elements during conveying. The conveyor device holds elements in a controlled manner during transport, then releases them at precisely calculated moments to achieve centre-to-centre positioning. This dynamic approach maintains element stability during conveying while enabling accurate positioning at the stacking point.
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 enables precise alignment and stacking of flat elements, meeting stringent accuracy requirements while maintaining high production speed, thus overcoming the limitations of existing technologies.
Implementation Method 1
an optical measuring device which is arranged in a measurement relationship with the conveyor device and is designed to detect a position deviation and/or an angle offset of a flat element being conveyed on the conveyor device
Data Source
AI summary
The invention relates to a stacking station for the battery cell-producing industry, comprising a conveyor device for conveying flat elements and a stacking device arranged downstream of the conveyor device for forming a segment stack from conveyed flat elements. The stacking station has an optical measuring device which is arranged in a measurement relationship with the conveyor device and is designed to detect a position deviation ΔR, ΔS and/or an angle offset φ of a flat element being conveyed on the conveyor device.