Winding Needle Assembly With Rolling Member for Separator Protection
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Solution Overview
Problem
The production efficiency of batteries is hindered by the friction between winding needles and separators during the winding process, leading to scratching and misplacement of the separator, resulting in waste and reduced efficiency.
Innovation Solution
A winding needle assembly with a first and second winding needle, where the second needle features a rolling member to facilitate rolling friction, reducing friction and preventing scratching or misplacement of the separator during insertion and withdrawal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional winding needle is used, then the structure is simple, but the needle eye is prone to clogging and the winding edge becomes rounded
Solution Approach 1:
The winding needle is divided into multiple functional segments: a cylindrical body portion, a separate winding edge portion, and a needle eye portion. The winding edge portion is detachably connected to the body, allowing independent replacement and cleaning of each segment to prevent clogging while maintaining structural integrity.
Solution Approach 2:
The winding edge portion is designed with rotational capability relative to the body portion, allowing it to be rotated for cleaning access and positioned at optimal angles during operation. This dynamic adjustment prevents material buildup and maintains sharp winding edges without requiring complete needle replacement.
2Duration of action of stationary object
If the winding needle is made durable, then service life increases, but cleaning becomes difficult and time-consuming
Solution Approach 1:
The needle eye and winding edge portions are designed as detachable components that can be separated from the body portion. This segmentation allows the winding edge to be removed and cleaned independently without disassembling the entire needle assembly, maintaining durability while simplifying maintenance.
Solution Approach 2:
A cleaning tool is introduced as an intermediary element that fits through the needle eye and against the winding edge. This mediator enables efficient cleaning of hard-to-reach areas without requiring manual disassembly or complex cleaning procedures, preserving both service life and ease of maintenance.
3Manufacturing precision
If the winding edge is made sharp, then winding precision improves, but the edge becomes more susceptible to damage and rounding
Solution Approach 1:
The winding edge is designed as a separate replaceable component with a geometry optimized for sharpness. Its detachable nature allows frequent replacement before damage occurs, maintaining high winding precision while the overall needle assembly remains durable and reusable.
Solution Approach 2:
The winding edge portion is designed for controlled replacement rather than permanent use. When the sharp edge becomes dull or damaged, only the winding edge portion needs to be replaced while the body and needle eye are retained and reused, optimizing the balance between precision and durability.
4Reliability
If the needle eye is enlarged to prevent clogging, then material flow improves, but structural integrity weakens
Solution Approach 1:
The needle eye portion is designed as a separate component with optimized geometry that balances open area for material flow with sufficient wall thickness for structural strength. This segmentation allows the needle eye to be independently replaced if structural issues arise while maintaining the benefits of a larger opening for clogging prevention.
Data Source
Figure 1~2
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Figure 5~6
AI summary
A winding needle assembly and a winding device. The winding needle assembly (30) is used for winding an electrode plate and a separator (42c), and comprises a first winding needle (31) and a second winding needle (32), wherein the first winding needle (31) and the second winding needle (32) are used for clamping the separator (42c); and a rolling member (40) is arranged on the side of the second winding needle (32) facing the first winding needle (31). The rolling member (40) is arranged on the side of the second winding needle (32) facing the first winding needle (31), and rolling friction is formed between the rolling member (40) and the first winding needle (31), such that frictional force between the first winding needle (31) and the second winding needle (32) is reduced, and the winding needle assembly (30) is prevented from scratching the separator (42c) when being inserted into or pulled out of the separator (42c), or is prevented from bringing out part of the separator (42c) in a staggered manner when the second winding needle (32) is pulled out, thereby improving the production efficiency of a battery (100).