Battery Electrode Winding Needle Clamping to Prevent Head Bending
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Solution Overview
Problem
In the process of winding cathode and anode plates with a separator, the heads of these plates tend to bend due to collision with the winding needle assembly, leading to operational issues.
Innovation Solution
A winding method and machine that uses a movable winding needle assembly to clamp the heads of the cathode and anode plates and the separator simultaneously, preventing them from coming into contact with the outer periphery of the winding needle assembly and thus avoiding bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the separator is wound first and then the cathode plate and anode plate are wound, then the winding process can be completed, but the heads of the cathode plate and anode plate are prone to be bent
Solution Approach 1:
The cathode plate and anode plate heads are clamped by the winding needle assembly before the winding action begins. This preliminary clamping prevents the plates from bending during the subsequent winding process, solving the technical contradiction by preparing the plates in advance to maintain their flatness while completing the winding operation.
2Manufacturing precision
If the cathode plate and anode plate heads are clamped by the winding needle assembly before winding, then the plates remain flat, but the winding needle assembly structure becomes more complex
Solution Approach 1:
The winding needle assembly is designed to perform multiple functions: it serves as both the clamping device for holding the plate heads and the winding tool for wrapping the plates. By combining these functions into a single assembly, the patent avoids increasing device complexity while maintaining the flatness of the plate heads during winding.
3Productivity
If the separator is used to wind the cathode and anode plates, then the winding can proceed, but collision with the winding needle assembly causes bending
Solution Approach 1:
The winding needle assembly applies a preliminary clamping force to the cathode and anode plate heads before the winding operation begins. This preliminary anti-action counteracts the potential harmful collision forces that would otherwise cause bending during the winding process, allowing the winding operation to proceed without deformation.
Data Source
AI summary
A winding method may comprise clamping heads of an anode plate, a cathode plate and a separator between a first half winding needle and a second half winding needle of a winding needle assembly at a winding station; and rotating the winding needle assembly at the winding station to wind the anode plate, the cathode plate and the separator to form an electrode assembly.