Multi-Port Winding Needle Assembly for Rigid Electrode Winding
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Solution Overview
Problem
Existing winding needle assemblies have low efficiency and poor structural rigidity, leading to issues such as wrinkles, poor alignment, and limited winding speed in electrode assembly production, which affects production quality and efficiency.
Innovation Solution
A winding needle assembly with a support seat and a winding apparatus, a production device, and a method for winding electrode assemblies, which includes a rotatably connected winding needle with multiple winding parts and a support seat, allowing simultaneous winding of multiple electrode assemblies, improved structural strength, and reduced deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single winding needle is used to wind electrode assemblies, then the structural simplicity is maintained, but the production efficiency is low
Solution Approach 1:
The winding needle is divided into multiple independent winding parts (first winding part, second winding part, etc.) that can simultaneously wind multiple electrode assemblies. Each winding part has its own winding surface and can operate independently, transforming a single-function needle into a multi-functional parallel processing tool, thereby significantly improving production efficiency without requiring multiple separate needles
Solution Approach 2:
The winding needle is designed with multiple winding parts that can simultaneously perform winding operations on multiple electrode assemblies. This multi-functional design allows a single needle structure to replace multiple individual needles, achieving both improved productivity and space utilization while maintaining relative structural simplicity
2Speed
If the winding needle length is increased to improve winding speed, then the winding efficiency is improved, but the rigidity and structural strength decrease
Solution Approach 1:
The long winding needle is segmented into multiple winding parts distributed along the axial direction, with each part having a manageable length that maintains sufficient rigidity. The needle body includes support sections between winding parts that provide structural reinforcement, allowing the overall structure to achieve both the necessary length for high-speed winding and the local rigidity to prevent deformation during operation
Solution Approach 2:
Different sections of the winding needle have different structural characteristics optimized for their specific functions. The winding parts have smooth surfaces for quality winding, while the support sections between winding parts have enhanced structural strength to maintain rigidity. This local differentiation allows the needle to simultaneously achieve high winding speed and maintain structural integrity
3Strength
If the winding needle diameter is increased to improve rigidity, then the structural strength is improved, but the winding central hole size increases reducing energy density
Solution Approach 1:
The winding needle uses a segmented design with multiple winding parts of optimized diameter. Each winding part has a diameter sufficient for its local structural strength requirements, while the overall distributed arrangement allows the winding central hole to be minimized. The support sections between winding parts provide additional structural reinforcement, allowing thinner needle sections at the winding surfaces and thus reducing the winding central hole size
Solution Approach 2:
The winding needle employs composite structural design combining different material properties or structural configurations in different sections. The winding parts use materials or structures optimized for surface quality and minimal diameter, while support sections use reinforced structures for rigidity. This composite approach achieves both high structural strength and minimal winding central hole size for improved energy density
Data Source
AI summary
The present application relates to a winding needle assembly, a winding apparatus, a production device, and a method for winding electrode assemblies in the field of battery production. The winding needle assembly includes a support seat and a winding needle rotatably connected to the support seat along the needle's axial direction. The winding needle extends outward from the support seat to form multiple winding portions outside the support seat, each configured to wind electrode assemblies. The assembly enables simultaneous winding of multiple electrode assemblies to increase production efficiency. While winding, the support seat reduces the length of the unsupported portion of the needle, enhancing the rigidity and strength of the winding portion. This structure mitigates deformation of the winding part during the winding process and alleviates issues such as wrinkles, poor alignment, and limited winding speed, thereby improving the quality and efficiency of electrode assembly production.