Battery Cell Degas Station for Formation Gas Capture and Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current battery fabrication processes are not compatible with high throughput means to acquire battery cell formation gas for analysis, limiting scalable cell quality control and leading to delayed discovery of cell degradation and quality issues.
Innovation Solution
A degas system that captures and processes battery cell formation gas for analysis, allowing a first portion to be routed to a collection chamber and then diluted before being measured by a cell quality control gas manifold, enabling efficient extraction and analysis of the gas without venting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If battery cell formation gas is vented directly during degassing, then the degassing process is simple and fast, but the formation gas cannot be captured for analysis, limiting quality control
Solution Approach 1:
The degas station is segmented into multiple functional chambers: a sampling chamber for capturing formation gas, a collection chamber for storing the captured gas, and a venting chamber for safe discharge. This segmentation allows the system to both capture gas for analysis and maintain simple degassing operations through dedicated functional zones.
Solution Approach 2:
A valve system acts as an intermediary mechanism between the sampling chamber and collection chamber, controlling the transfer of formation gas. This intermediary component enables precise regulation of gas flow, allowing the system to capture gas when needed while maintaining overall system simplicity through automated control.
2Productivity
If a complex gas capture and analysis system is implemented, then formation gas can be analyzed for quality control, but the manufacturing process becomes more complex and less scalable
Solution Approach 1:
The degas station is designed as a multi-functional system that combines gas capture, storage, analysis preparation, and venting capabilities in a single integrated unit. This universal design allows the same apparatus to handle multiple tasks in the gas management process, improving productivity without requiring separate complex systems for each function.
Solution Approach 2:
The system incorporates automated valve control mechanisms that enable self-regulating gas flow management. The valves automatically direct gas to appropriate chambers based on process requirements, reducing the need for manual intervention and complex external control systems, thereby maintaining scalability while enabling high throughput operation.
3Loss of time
If formation gas is captured in a collection chamber for analysis, then quality issues can be identified early, but the system requires additional components and processing steps
Solution Approach 1:
The sampling chamber captures formation gas immediately upon cell insertion, performing the gas collection action in advance before analysis is required. This preliminary capture allows subsequent analysis to proceed without delay, as the gas is already contained and ready for examination when analysis begins.
Solution Approach 2:
The formation gas is extracted from the battery cell and isolated in the sampling chamber, separating it from the cell for dedicated analysis. This extraction allows the gas to be studied independently without interfering with the battery cell itself, enabling rapid quality assessment through focused analysis of the captured gas sample.
Data Source
AI summary
Aspects of the disclosure include degas equipment and degassing process schemes for providing high throughput extraction of battery cell formation gas. An exemplary method can include loading a battery cell in a sampling chamber of a degas station and creating an opening in the battery cell to release formation gas. A first portion of the formation gas can be routed to a collection chamber of the degas station while the formation gas is prevented from venting. After routing the first portion of the formation gas to the collection chamber, a second portion of the formation gas can be vented until degassing is complete. The first portion of the formation gas can be diluted with a dilution fluid and the diluted first portion of the formation gas can be routed to a cell quality control gas manifold configured to measure battery cell formation gas compositions.