Lithium Filament Deposition for Battery Electrode Defect Filling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Lithium electrodes often have defects during manufacturing or transportation, which decrease battery performance and increase scrap rates due to uneven lithium layer thickness and damage.
Innovation Solution
A lithium addition system that includes a lithium addition head and a fill control module to identify defects and apply power or energy to a lithium filament, softening, melting, or deforming it for deposition into the defects in the lithium layer, using heaters, vibrators, or arc welding, ensuring uniformity and filling defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If lithium layer is manufactured using conventional methods, then production speed is maintained, but defects and uneven thickness occur decreasing battery performance
Solution Approach 1:
The system performs preliminary identification of defects using optical sensors and machine vision before the lithium layer completes its formation, allowing proactive correction rather than reactive repair. This enables maintaining production speed while improving uniformity by addressing issues early in the manufacturing process.
Solution Approach 2:
The system uses the existing manufacturing line's movement and structure to feed the lithium filament through the defect area, utilizing the production line's own motion to deliver corrective material without requiring separate handling equipment, thus maintaining productivity while improving precision.
2Manufacturing precision
If lithium filament is applied to fill defects, then uniformity is improved, but additional processing time is required
Solution Approach 1:
The lithium filament feeding and deposition process occurs continuously as the lithium layer moves through the manufacturing line, without stopping production or requiring separate batch processing. The system maintains continuous operation while applying corrective material, eliminating idle time and keeping the production rhythm intact.
Solution Approach 2:
Defects are identified and lithium filament is positioned to fill them before the lithium layer completes its formation process, allowing the corrective action to occur during the natural production flow rather than requiring post-processing intervention, thus minimizing additional time.
3Reliability
If conventional lithium layer manufacturing is used, then production efficiency is maintained, but scrap rates increase due to defects
Solution Approach 1:
The system converts potential waste (defective lithium layers that would become scrap) into usable product by automatically identifying and filling defects with lithium filament. Defects that would normally require discarding the entire layer are instead repaired locally, transforming scrap-generating failures into opportunities for corrective action and salvaging otherwise lost material.
Solution Approach 2:
Instead of requiring entire lithium layers to meet perfect uniformity standards or be discarded due to localized defects, the system applies corrective lithium filament only at the specific defect locations. This localized correction maintains overall layer quality while preserving materials that would otherwise be scrapped, reducing waste while improving reliability.
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 system effectively fills defects in lithium layers, improving battery performance and reducing scrap rates by ensuring a uniform lithium layer thickness and enhancing the overall efficiency of lithium deposition.
Implementation Method 1
apply power to the at least one electrical heater thereby (a) at least one of softening, melting, and deforming the filament
Implementation Method 2
the at least one vibrator is configured to vibrate at an ultrasonic frequency when power is applied
Implementation Method 3
apply power to the non-consumable electrode of the lithium addition head while the filament is fed into a space between the non-consumable electrode and the defect, the application of power to the non-consumable electrode causing an arc
Implementation Method 4
a light source is configured to output light onto the filament in a space between the lithium addition head and the defect, the light (a) at least one of softening, melting, and deforming the filament
Data Source
AI summary
A lithium addition system includes: a lithium addition head configured to receive a filament of lithium; and a fill control module configured to: identify a defect in a layer of lithium; actuate an actuator and move the lithium addition head to a location of the defect and vertically above the defect; and apply one of power and energy to the filament thereby (a) at least one of softening, melting, and deforming the filament and (b) depositing lithium from the filament into the defect in the layer of lithium.