Electrode Stack Production via Synchronized Carriage Transport
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Solution Overview
Problem
Existing methods for producing electrode stacks for battery modules are inefficient in terms of space utilization and precision, particularly in the production of lithium-ion battery modules for motor vehicle drives, as they often result in a loss of space when multiple modules are arranged.
Innovation Solution
A method and device utilizing a transport system with multiple stacking stations and individually movable carriages to synchronize the positioning and stacking of electrode and separator layers from web-shaped film supplies, allowing for precise and parallel production of electrode stacks, with features like clamping devices and quality control mechanisms to ensure accurate layer alignment and material integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rotary table with multiple stacking stations is used to produce electrode stacks in parallel, then productivity is improved, but device complexity increases due to synchronization requirements between carriages and stacking stations
Solution Approach 1:
The patent implements dynamic synchronization where carriages can be individually adjusted in position and speed along the transport path. The control system dynamically coordinates the movement of multiple carriages with the operation cycles of stacking stations, allowing flexible adaptation to different production rates and stack heights without rigid mechanical coupling
Solution Approach 2:
The transport system uses universally applicable carriages that can service multiple stacking stations and handle different electrode stack configurations. The same carriage design serves both transport and positioning functions, while the control system manages both synchronization and individual carriage operation through a unified interface
2Manufacturing precision
If individual carriages are used for each electrode stack, then manufacturing precision is improved through synchronized positioning, but device complexity increases due to multiple movable components
Solution Approach 1:
The system divides the production line into independent modular units: individual carriages for each stack, separate stacking stations, and independent transport segments. This segmentation allows precise control of each unit while maintaining overall system coordination through the control system, reducing the complexity of mechanical linkages
Solution Approach 2:
The patent replaces complex mechanical synchronization mechanisms with a control-based system. Sensors detect carriage positions and stack heights, and the control system adjusts timing and positioning electronically, eliminating the need for intricate mechanical coupling devices and reducing moving parts
3Ease of manufacture
If web-shaped film supplies are used for electrodes and separators, then ease of manufacture is improved, but manufacturing precision may worsen due to challenges in cutting and transferring individual layers
Solution Approach 1:
The stacking stations are equipped with integrated cutting and transfer mechanisms that automatically process the web-shaped films. The system self-regulates the cutting, separation, and placement of individual layers without manual intervention, maintaining both efficiency and precision through automated control
Solution Approach 2:
Sensors monitor the position, alignment, and quality of each layer during the cutting and transfer process. The control system receives this feedback and adjusts cutting parameters, transfer timing, and positioning to ensure precise layer placement while maintaining continuous production from web-shaped supplies
Data Source
Figure 1~3
Figure 4~5
AI summary
The present invention relates to a method and to an apparatus for producing an electrode stack (1), for example for a battery module, wherein, at at least two stacking stations (4, 5, 6), preferably at least three stacking stations (4, 5, 6), in each case at least one electrode layer (12, 13) and/or at least one separator layer (11) is separated from a strip-like foil reservoir and stacked on a set-down surface (33), wherein a plurality of individually movable carriages (31) which each have at least one set-down surface (33) are provided, and wherein the carriages (31), for the purpose of transferring at least one electrode layer (12, 13) or at least one separator layer (11) from one of the at least two stacking stations (4, 5, 6), are synchronized in each case individually with the stacking station (4, 5, 6) in question.