Battery Cell Rework Automation for Accurate Defect Rate Counting
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Solution Overview
Problem
Conventional battery cell manufacturing processes lack the ability to automatically measure the ratio of defect quantity to input quantity and perform rework based on defect types, making it difficult to calculate accurate defect rates and improve production efficiency.
Innovation Solution
A battery cell manufacturing apparatus equipped with rework automation equipment that includes a sorting unit, rework unit, detection unit, and defect quantity measurement unit to automatically sort, rework, and measure defective cells based on specific rework types, allowing for precise defect rate calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual defect checking and rework marking is performed, then device complexity is reduced, but measurement precision and productivity deteriorate
Solution Approach 1:
The system segments the defect management process into distinct functional modules: detection unit for identifying defects, sorting unit for categorizing defective cells by type, rework unit for performing specific repairs, and quantity measurement unit for tracking. This segmentation enables automated precision measurement while keeping each module's complexity manageable and focused on a specific task.
Solution Approach 2:
The control unit serves as an intermediary that coordinates between the detection, sorting, rework, and measurement units. It receives defect information, determines appropriate rework types, manages the rework process, and calculates defect rates, thereby integrating the various components into a cohesive automated system without requiring complex direct interactions between all units.
2Productivity
If automated rework equipment is introduced, then productivity is improved, but device complexity increases
Solution Approach 1:
The rework automation equipment is designed with multi-functional units that can handle various defect types through different rework methods. The sorting unit categorizes defects by type, the rework unit performs multiple repair operations (re-welding, re-stacking, re-sealing), and the system integrates detection, sorting, rework, and measurement functions, thereby achieving high productivity through universal automation rather than multiple specialized systems.
Solution Approach 2:
The system incorporates feedback mechanisms where the detection unit continuously monitors defective cells, the quantity measurement unit tracks rework progress, and the control unit adjusts the rework process based on real-time data. This feedback loop enables automated productivity improvement while managing system complexity through intelligent control rather than mechanical complexity.
3Loss of time
If manual defect marking is performed, then ease of operation is maintained, but loss of time increases
Solution Approach 1:
The automated rework system performs defect identification, categorization, repair, and measurement without human intervention. The detection unit automatically identifies defects, the sorting unit self-categorizes by defect type, the rework unit autonomously performs repairs, and the quantity measurement unit automatically tracks progress, eliminating manual marking time while the control unit manages operations through programmed logic rather than complex manual procedures.
Data Source
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AI summary
The present invention relates to a battery cell manufacturing apparatus including rework automation equipment and a rework quantity counting method using the same, and more particularly to a battery cell manufacturing apparatus capable of measuring the quantity of reworked battery cells while automatically performing rework and a rework quantity counting method using the same.