Battery Electrode Bag-Making Stacker for Wrinkle-Free Diaphragm Tension
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Solution Overview
Problem
Current lithium-ion battery stacking technologies, such as the Z-shaped method, suffer from low production efficiency, high costs, large energy consumption, and frequent diaphragm wrinkles that can lead to safety issues due to tension changes during the stacking process.
Innovation Solution
A bag-making type stacking apparatus that includes a negative electrode bag-making system, a positive electrode plate-making system, a stacking device, and a carrying device, where the diaphragm is tensioned and maintained properly to prevent wrinkles, allowing for efficient stacking of unit plates and positive electrode plates, ensuring consistent diaphragm tension and preventing wrinkles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Z-shaped stacking method is used, then stacking can be performed, but stacking speed is low and production efficiency is poor
Solution Approach 1:
The negative electrode plates are pre-assembled into unit plates with diaphragms before stacking. This preliminary bag-making process prepares the components in advance, allowing for faster stacking operations and improving overall production efficiency.
Solution Approach 2:
The stacking process is divided into separate stages: negative electrode plate preparation, unit plate formation, and final stacking with positive electrode plates. This segmentation allows each stage to be optimized independently, improving overall productivity.
2Reliability
If Z-shaped stacking method is used, then stacking can be performed, but diaphragm wrinkles easily occur due to tension changes
Solution Approach 1:
The diaphragm is pre-stretched and tensioned during the unit plate formation process before stacking. This preliminary tensioning ensures the diaphragm maintains proper tension throughout the stacking process, preventing wrinkles and maintaining reliability.
Solution Approach 2:
The tension parameters of the diaphragm are carefully controlled and maintained at optimal levels during unit plate formation and stacking. By adjusting and maintaining appropriate tension parameters, the diaphragm remains wrinkle-free throughout the process.
3Productivity
If existing stacking apparatus is used, then stacking can be performed, but device complexity is high and floor area is large
Solution Approach 1:
The negative electrode plate-making system and unit plate composite bag-making system are integrated into a coordinated workflow. This merging of functions reduces the number of separate devices needed and simplifies the overall apparatus while maintaining productivity.
Solution Approach 2:
The stacking device is designed to handle multiple operations: picking up unit plates, positioning positive electrode plates, and assembling complete battery stacks. This multi-functionality reduces the need for specialized devices for each operation, simplifying the overall system.
Data Source
AI summary
The present application relates to the technical field of battery production configuration, in particular to a bag-making type stacking apparatus and a stacked product. The bag-making type stacking apparatus comprises: a negative electrode bag-making system, comprising a negative electrode plate plate-making system (1) and a unit plate composite bag-making system (2) which are arranged in a spaced manner; a positive electrode plate plate-making system (3) spaced apart from the negative electrode bag-making system; a stacking device (4) spaced apart from the negative electrode bag-making system and the positive electrode plate plate-making system (3); and a carrying device (5) spaced apart from the stacking device (4), the carrying device (5) is provided with a carrying member which reciprocates between the unit plate composite bag-making system (2), the stacking device (4) and the positive electrode plate plate-making system (3). The bag-making type stacking apparatus can stack a plurality of unit plates (100) and a plurality of positive electrode plates (200) in one instance, thereby greatly improving the stacking speed, and improving the production efficiency; and importantly, the tension change amplitude of a diaphragm is small, and the diaphragm is always kept in a properly tensioned state, thereby avoiding wrinkles during stacking, prolonging the cycle life of a battery, avoiding thermal runaway caused by diaphragm contraction, and ensuring safety of the battery.