Battery Stacking Device Folding Mechanism
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Solution Overview
Problem
Existing secondary battery stacking technologies face challenges in efficiently stacking electrode plates at a high rate without additional processes or material changes, affecting safety and reliability.
Innovation Solution
A stacking device and method that involves a first electrode plate bonded body with separators on both surfaces, a second electrode plate arranged on both surfaces of the first electrode plate bonded body, and a folding mechanism to form a unit cell, allowing for the simultaneous stacking of four electrode plates in a single operation, with separator bonding to prevent movement and ensure safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional stacking methods are used to stack electrode plates, then the stacking process is simple, but the stacking rate is low and productivity is reduced
Solution Approach 1:
The patent merges multiple stacking operations into a single folding action. The stacking device folds the electrode plate assembly in one operation to simultaneously stack multiple electrode plates (typically 4 plates per fold), converting sequential stacking into parallel stacking and dramatically improving productivity without requiring complex multi-step processes
Solution Approach 2:
The electrode plate assembly is segmented into specific configurations with separators positioned at designated locations before folding. This pre-segmentation allows the folding operation to efficiently stack plates in predetermined patterns, maintaining process simplicity while achieving high stacking rates
2Reliability
If electrode plates are stacked without separator bonding, then the manufacturing process is simpler, but electrical shorts may occur reducing reliability
Solution Approach 1:
The separators are bonded to the electrode plates in advance during the assembly preparation stage, before the folding operation. This preliminary bonding ensures that separators remain firmly in position throughout the stacking process, preventing electrical shorts between adjacent plates while maintaining a relatively simple overall process
3Manufacturing precision
If multiple stacking operations are performed separately, then each stacking step can be controlled precisely, but the overall manufacturing time increases
Solution Approach 1:
Multiple stacking operations that would traditionally be performed separately are merged into a single folding operation. The device folds the assembled electrode plate structure to simultaneously achieve precise stacking of multiple plates in one motion, eliminating the time losses associated with multiple sequential operations while maintaining alignment precision through the inherent geometry of the folding mechanism
Data Source
Figure 1
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Figure 4A
AI summary
Various embodiments of the present invention provide a stacking device for a secondary battery configured to stack electrode plates at a high rate, a stacking method using the same, and a secondary battery obtained thereby. As an example, disclosed are a stacking device for a secondary battery, a stacking method using the same, and a secondary battery obtained thereby, the stacking device comprising: a first electrode plate bonded body supply portion for supplying a first electrode plate bonded body comprising a first electrode plate, which comprises a first electrode first coating portion and a first electrode second coating portion positioned to be spaced apart from the first electrode first coating portion, and separators stacked on both surfaces of the first electrode plate; a second electrode plate supply portion for arranging a second electrode first coating portion and a second electrode second coating portion of a second electrode on both surfaces of the first electrode first coating portion of the first electrode plate bonded body, respectively, thereby forming a unit cell; and a folding portion for folding the first electrode plate bonded body, which has the unit cell formed thereon, such that the second electrode first coating portion or the second electrode second coating portion of the second electrode plate faces the first electrode second coating portion of the first electrode plate, thereby forming a stack.