Battery Lamination Device Electrostatic Alignment
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Solution Overview
Problem
Existing lamination methods for battery stacks face challenges in adapting to size changes and maintaining sufficient electrostatic attractive force due to conductor electrodes being discharged when contacted with conductive carriers, leading to instability in temporary fastening.
Innovation Solution
A lamination device and method that employs electrostatic attraction with controlled charging of components using ionizers to maintain electrostatic force, combined with a welding stage for rapid and stable fastening using electrode tabs, allowing for precise alignment and adaptation to size changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electrostatic attraction is used to temporarily fasten battery components during lamination, then the method can adapt to size changes, but the electrostatic force is lost when conductive electrodes contact conductive carriers
Solution Approach 1:
A dielectric member is introduced as an intermediary between the conductive electrode and the conductive carrier. This dielectric layer prevents direct contact and charge discharge, allowing the electrostatic attractive force to be maintained throughout the lamination process while accommodating size changes.
Solution Approach 2:
Electrostatic charge is applied to the battery components before they contact the conductive carrier. By establishing the electrostatic attractive force in advance, the components are secured before any potential discharge could occur, ensuring stable temporary fastening throughout the lamination process.
2Manufacturing precision
If guide members are used to prevent positional deviation, then alignment precision is improved, but the device cannot adapt to size changes
Solution Approach 1:
The lamination device uses a dynamic approach where components are temporarily fastened using electrostatic attraction rather than fixed mechanical guide members. This allows the system to adapt to different battery stack sizes while maintaining alignment precision through controlled electrostatic forces during the lamination process.
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 adaptation to size changes in battery stacks and maintains a sufficient electrostatic attractive force for temporary fastening, ensuring stability and efficiency in the lamination process.
Implementation Method 1
when a positive electrode, a negative electrode, and a separator of a battery are laminated using electrostatic attraction, because the positive electrode and the negative electrode are conductors, unlike ceramic green sheets, the electrodes that have been charged will be discharged upon contact with, for example, a conductive carrier holder
Implementation Method 2
negative ions are emitted from an ionizer toward an exposed surface of a first ceramic green sheet on which a second ceramic green sheet is to be laminated, so that the surface of the first ceramic green sheet is negatively charged
Data Source
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AI summary
A lamination device 30 includes a first charger 40 for emitting charged particles toward an uppermost surface of a battery stack 10 of a positive electrode sheet 12, a negative electrode sheet 14, and a separator sheet 16 that are stacked on a stacking stage 32. As a result of the emission of charged particles, the battery stack 10 and one of a positive electrode sheet 12, a negative electrode sheet 14, and a separator sheet 16 that is to be stacked on the stack 10 are electrostatically attracted to each other.