Electrode Assembly Winding Shaft Control to Reduce Tension Damage
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Solution Overview
Problem
The cooperative movement between inner and outer shafts in existing winding devices can reduce the yield and service performance of electrode assemblies due to tension issues and convex corners, leading to potential breakage during the winding process.
Innovation Solution
A winding device with separate control mechanisms for the inner and outer shafts, utilizing sliders, pushers, and adjustment rods to independently adjust the shaft perimeters, reducing tension and convex corner contact with the electrode assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the inner shaft and outer shaft move cooperatively during winding, then the winding process is simplified, but the electrode assembly is subjected to tension and convex corner contact that reduces yield and service performance
Solution Approach 1:
The patent divides the shaft system into independent inner shaft and outer shaft components, each with separate drive mechanisms (first slider and second slider respectively). This segmentation allows independent control of each shaft's movement, enabling the inner shaft to release the electrode assembly before the outer shaft contracts, thereby eliminating tension and convex corner contact that would otherwise damage the electrode assembly.
2Volume of moving object
If the outer shaft contracts to decrease outer diameter for electrode assembly separation, then the winding device achieves compact form, but the convex corner of the outer shaft may tension and damage the electrode assembly
Solution Approach 1:
The patent implements preliminary action by configuring the drive mechanisms so that the inner shaft completes its movement (releasing the electrode assembly) before the outer shaft begins its contraction. This sequential timing ensures that when the outer shaft contracts to decrease its outer diameter, the electrode assembly is already free from the inner shaft, preventing any tension or damage from convex corner contact.
3Manufacturing precision
If separate control mechanisms are implemented for inner and outer shafts, then the electrode assembly processing quality is improved, but the device complexity increases
Solution Approach 1:
The patent employs dynamic control through sliders that can move along inclined sliding slots. The first slider moves along an inclined first sliding slot to control the inner shaft, and the second slider moves along an inclined second sliding slot to control the outer shaft. This dynamic mechanism allows precise, independent adjustment of each shaft's position and movement timing, achieving high processing quality while maintaining a relatively compact and integrated device structure.
Data Source
AI summary
Provided are a winding device and a winding apparatus. An inner shaft of the winding device is configured to clamp an electrode assembly; and an outer shaft of the winding device is configured to wind the electrode assembly. The winding device includes: a first slider and a first pusher, where the first slider may reciprocate in a first sliding slot in the first pusher in a first direction, and an extension direction of the first sliding slot is inclined from the first direction such that the first pusher drives a first inner shaft to reciprocate in a second direction, the second direction being perpendicular to the first direction; and a second slider and a second pusher, where the second slider may reciprocate in a second sliding slot in the second pusher in a third direction, and an extension direction of the second sliding slot is inclined from the third direction.