Battery Unit Cell Lamination With Magnetic Electrode Alignment
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Solution Overview
Problem
Manufacturing unit cells poses challenges when the center electrode is separated from its regular position, as it becomes difficult to align and grasp, leading to potential capacity reduction and short circuits in secondary batteries.
Innovation Solution
An apparatus and method utilizing a magnetic force generation part, such as an electromagnet, to align the center electrode at a regular position without physical contact, by applying a magnetic force when the electrode is misaligned, allowing it to be attracted back to its correct position during the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the separator is laminated on the center electrode during manufacturing, then the unit cell structure is formed, but the center electrode becomes hidden and cannot be grasped from the outside
Solution Approach 1:
A magnetic force generation part (electromagnet) is introduced as an intermediary tool to detect and adjust the center electrode position. The electromagnet generates magnetic force to attract the center electrode, enabling non-contact position correction without requiring direct physical contact with the hidden electrode
Solution Approach 2:
The patent replaces traditional mechanical contact-based position adjustment with a magnetic field-based system. The electromagnet uses magnetic force instead of mechanical contact to grasp and reposition the center electrode, solving the problem of inaccessible electrode positioning after separator lamination
2Productivity
If the center electrode is separated from the regular position, then manufacturing continues, but capacity reduction and short circuits may occur in secondary batteries
Solution Approach 1:
The system implements feedback control by continuously monitoring the center electrode position using the electromagnet and automatically adjusting the position when deviation is detected. This closed-loop control ensures the electrode remains at the regular position, preventing capacity reduction and short circuits while maintaining manufacturing continuity
Solution Approach 2:
The electromagnet is positioned to preemptively correct center electrode misalignment before it causes manufacturing defects. By detecting and correcting position deviations early in the manufacturing process, the system prevents subsequent capacity reduction and short circuit problems
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
Enables the center electrode to be accurately aligned at a regular position non-contactually, preventing damage and reducing the risk of capacity reduction and short circuits in secondary batteries.
Implementation Method 1
a magnetic force generation part disposed above or below a first laminate, in which the lower separator, the center electrode, and the upper separator are sequentially laminated, to apply magnetic force to the first laminate
Data Source
AI summary
Discussed is an apparatus for manufacturing a unit cell of a battery, the apparatus including: a center electrode reel from which a center electrode is unwound; an upper separator reel from which an upper separator laminated on a top surface of the center electrode is unwound; a lower separator reel from which a lower separator laminated on a bottom surface of the center electrode is unwound; and a magnetic force generation part disposed above or below a first laminate to apply magnetic force to the first laminate, the first laminate including the lower separator, the center electrode, and the upper separator that are sequentially laminated.