Adjustable Winding Shaft for Battery Tab Alignment
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Solution Overview
Problem
The misalignment of tabs during the winding process in battery cell manufacturing leads to positional interference with other structural members, affecting cell performance and safety.
Innovation Solution
A winding shaft with an adjustable adjustment member that can move simultaneously in the axial and radial directions, driven by an actuator, to adjust the winding circumference and align tabs, reducing misalignment by computing and adjusting the winding circumference based on misalignment magnitudes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed winding shaft is used to wind plates, then the winding process is simple and fast, but tab misalignment occurs resulting in positional interference with structural members
Solution Approach 1:
The winding shaft is transformed from a fixed structure to a dynamic adjustable structure. The adjustment member can move relative to the winding shaft body, allowing the winding circumference to be dynamically changed to correct tab misalignment issues
Solution Approach 2:
The winding shaft is divided into two main parts: a fixed winding shaft body and a movable adjustment member. This segmentation allows independent adjustment of the winding circumference while maintaining the overall structural integrity
2Manufacturing precision
If the winding circumference is adjusted to correct tab misalignment, then manufacturing precision improves, but the adjustment mechanism increases device complexity
Solution Approach 1:
The manual or complex mechanical adjustment process is replaced with an automated actuator system. The actuator automatically adjusts the adjustment member based on detected misalignment, simplifying the operation while achieving precise alignment
3Reliability
If tab misalignment is not corrected, then the manufacturing process remains simple, but positional interference with structural members occurs affecting cell safety
Solution Approach 1:
The system performs preliminary detection of tab positions before completing the winding process. Based on the detection results, the adjustment member is positioned in advance to prevent misalignment issues, ensuring cell safety before the problematic winding occurs
Data Source
AI summary
Provided are a winding shaft, a cell manufacturing apparatus, and a cell manufacturing method. The winding shaft is used for winding plates and includes: a winding shaft body including a first winding surface; an adjustment member configured to be mounted to the winding shaft body and movable simultaneously in an axial direction of the winding shaft and in a radial direction of the winding shaft, where the adjustment member includes a second winding surface, and the first winding surface and the second winding surface are configured to wind the plates jointly; and an actuator configured to drive the adjustment member to move to change a relative position of the second winding surface with respect to the first winding surface, so as to change a winding circumference of the winding shaft. The winding shaft of the present application can reduce the possibility of or the amount of misalignment between the tabs.