Hinged Battery Winding Needle for Expansion Force Control
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Solution Overview
Problem
In square lithium battery winding machines, the fusiform shape of the winding needle makes it difficult to control the expansion force when winding a pole piece and separator, affecting efficiency and quality.
Innovation Solution
A lithium battery winding needle with a cylindrical hollow chamber structure formed by hinged arc-shaped columns and elastic body, featuring a mechanism with support rods and an air cylinder to maintain consistent expansion force during winding, allowing for precise control of the winding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fusiform winding needle is used, then the winding needle can accommodate the pole piece and separator, but the expansion force cannot be controlled during winding
Solution Approach 1:
The winding needle is divided into multiple arc-shaped columns (first, second, third, fourth) that can move independently relative to each other. These segmented columns are connected through hinge points, allowing each segment to adjust its position to control expansion force during the winding process, while maintaining the overall cylindrical structure needed for winding operations.
Solution Approach 2:
The winding needle structure is made dynamic through the introduction of movable hinge connections between arc-shaped columns. The hinge points enable the columns to rotate and adjust their relative positions, transforming the rigid fusiform structure into a flexible, controllable system that can regulate expansion force during winding operations.
2Productivity
If a fusiform winding needle is used, then the winding needle can hold the pole piece and separator, but the winding efficiency and quality are affected
Solution Approach 1:
The invention changes the geometric parameters of the winding needle by using arc-shaped columns with specific radius ratios. The first and fourth arc-shaped columns have a larger radius than the second and third columns, creating an optimized cylindrical configuration that improves both winding speed and quality by distributing forces more evenly during the winding process.
3Shape
If arc-shaped columns with different radii are used, then the cylindrical hollow chamber structure is formed with optimized geometry, but the structural complexity increases
Solution Approach 1:
The invention introduces asymmetry in the radial configuration of the arc-shaped columns, where the first and fourth columns have a larger radius than the second and third columns. This asymmetric arrangement optimizes the cylindrical hollow chamber structure for winding operations while the hinge connections maintain structural coherence, balancing geometric optimization with manageable complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution significantly improves processing efficiency and quality while reducing costs by maintaining consistent expansion force during the winding of pole pieces and separators, enabling high-speed winding with consistent quality.
Implementation Method 1
the lithium battery winding needle includes an elastic body; and the clastic body sleeves the peripheral side of the whole enclosed by the first arc-shaped column, the second arc-shaped column, the third arc-shaped column, and the fourth arc-shaped column
Implementation Method 2
the lithium battery winding needle further includes a winding needle shank and an air cylinder; the first hinge point, the second hinge point, the third hinge point, and the fourth hinge point are all provided with support rods
Data Source
AI summary
The present disclosure discloses a lithium battery winding needle. A first arc-shaped column, a second arc-shaped column, a third arc-shaped column, and a fourth arc-shaped column are enclosed in sequence to form a cylindrical hollow chamber structure. The first arc-shaped column and the second arc-shaped column are hinged to each other by means of a first hinge point. The second arc-shaped column and the third arc-shaped column are hinged to each other by means of a second hinge point. The third arc-shaped column and the fourth arc-shaped column are hinged to each other by means of a third hinge point. The fourth arc-shaped column and the first arc-shaped column are hinged to each other by means of a fourth hinge point. The processing efficiency and quality are significantly improved; and processing costs are greatly reduced.