Electrode Assembly Insulating Sections for High-Speed Winding Alignment
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Solution Overview
Problem
The manufacturing process of electrode assemblies in batteries is inefficient due to reliance on frictional force, leading to issues like offset and corner folding of winding heads, which affects the speed and accuracy of assembly, resulting in low manufacturing efficiency and potential safety hazards.
Innovation Solution
The electrode assembly design includes insulating sections that align with the electrode plates and separators, allowing synchronous winding without frictional force, enhancing the strength of the central area and preventing offset and corner folding, thereby increasing initial winding speed and accelerating the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If frictional force is used to drive electrode plate feeding during winding, then the winding process can be simplified, but offset and corner folding of winding heads occur, reducing manufacturing precision and efficiency
Solution Approach 1:
An insulating section is introduced as an intermediary component between the electrode plate and the winding system. This insulating section acts as a mediator that enables precise positioning and feeding of the electrode plate during winding, eliminating the need to rely on frictional force while maintaining process simplicity. The insulating section includes positioning structures that guide the electrode plate through the winding process without causing offset or corner folding.
2Device complexity
If frictional force is relied upon for electrode plate feeding, then the winding mechanism remains simple, but feeding is delayed and manufacturing speed decreases
Solution Approach 1:
The insulating section is pre-configured with positioning structures before the winding process begins. These pre-configured structures enable the electrode plate to be fed synchronously with the winding operation from the very beginning, eliminating feeding delays that would otherwise occur when relying on frictional force. This preliminary arrangement of the feeding mechanism allows for immediate high-speed operation.
3Device complexity
If the central area of the electrode assembly has insufficient strength, then the structure remains simple, but collapse occurs during handling and assembly
Solution Approach 1:
The insulating section is merged with the electrode plate structure, combining the insulation function with the structural support function. This integrated design provides both electrical insulation and mechanical strength to the central area of the electrode assembly, preventing collapse during handling and assembly while maintaining structural simplicity. The insulating section becomes a multi-functional component that serves both protective and structural roles.
Data Source
AI summary
An electrode assembly includes: a first electrode plate layer, a first separator, a second electrode plate layer and a second separator. A winding start end of the first electrode plate layer, a winding start end of the first separator, and a winding start end of the second separator are substantially aligned with one another. The first electrode plate layer includes a first insulating section and a first electrode plate connected to each other, and the end of the first insulating section away from the first electrode plate is the winding start end of the first electrode plate layer. Along a winding direction of the electrode assembly, the winding start end of the second electrode plate layer is substantially aligned with the winding start end of the first electrode plate layer, or is located downstream of the winding start end of the first electrode plate layer.