Laminated Electrode Assembly Manufacturing Device
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Solution Overview
Problem
Current methods for manufacturing laminated electrode assemblies are inefficient in achieving high-speed production of laminated structures with alternating layers of separators and electrodes, particularly in the context of in-vehicle lithium ion secondary batteries.
Innovation Solution
A manufacturing device comprising multiple drums with independent cutting and heating mechanisms, where electrodes and separators are cut and heated in specific patterns to be laminated at high speeds, allowing for continuous and efficient production of 3-layer and 4-layer laminated bodies with precise control over lamination and cutting processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single drum is used for lamination and cutting, then the device structure is simple, but the manufacturing speed and productivity are limited
Solution Approach 1:
The manufacturing device is divided into multiple independent drums (first laminating drum, second laminating drum, cutting drum) that operate simultaneously at different stages. Each drum performs specific functions (lamination or cutting) independently, allowing parallel processing of multiple electrode assemblies, thereby increasing productivity without requiring a single complex drum to perform all operations sequentially
Solution Approach 2:
The patent transitions from a single-drum sequential process to a multi-drum spatial arrangement where lamination and cutting operations occur at different locations (dimensions) simultaneously. The first and second laminating drums operate at different positions along the production line, enabling continuous high-speed manufacturing by utilizing spatial distribution of operations
2Manufacturing precision
If continuous lamination without cutting is used, then the process is simple, but the precision of individual electrode plate formation is reduced
Solution Approach 1:
The cutting drum performs cutting and heating operations on the laminated electrode assembly before it is fully processed. By pre-cutting the continuous laminated structure into individual electrode plates and applying heating treatment, the device ensures precise layer formation and separation is achieved in advance, allowing subsequent handling and assembly to proceed with already-formed discrete components
Solution Approach 2:
The cutting drum acts as an intermediary device between the lamination process and final assembly. It receives the continuous laminated material from the laminating drums, performs precise cutting and heating operations, and outputs individually formed electrode plates. This intermediary step ensures manufacturing precision by separating the continuous lamination process from the discrete electrode plate formation requirement
3Productivity
If high-speed lamination is implemented, then productivity increases, but the quality and reliability of lamination may deteriorate
Solution Approach 1:
The lamination process is segmented into multiple stages across different drums (first laminating drum for initial lamination, second laminating drum for continued lamination). Each drum operates at optimized speeds for its specific lamination stage, allowing high overall productivity while maintaining quality control at each individual lamination step rather than requiring one drum to perform all lamination at maximum speed
Solution Approach 2:
The cutting drum with heating mechanism serves as an intermediary that processes the laminated material between lamination stages. The heating treatment applied by the cutting drum ensures proper bonding and quality of the lamination while the segmented drum structure allows each lamination stage to operate at speeds optimized for quality, preventing the need to compromise lamination quality for overall high-speed production
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 high-speed and continuous manufacturing of laminated electrode assemblies with precise control over layer formation, enhancing the efficiency and quality of the lamination process.
Implementation Method 1
multiple drums with independent cutting and heating mechanisms, where electrodes and separators are cut and heated in specific patterns to be laminated at high speeds
Data Source
AI summary
This layered electrode body production device is provided with: a first layering drum for layering, on a first layering stage, a layered body obtained by layering a separator single sheet and an electrode and then cutting the separator single sheet of the resulting layered body to a specific width; and a second layering drum, which is different from the first layering drum, that is for layering the cut layered body on a second layering stage, which is different from the first layering stage.