Degraded Battery Cell Evaluation via Patterned Lithium Plating
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Solution Overview
Problem
Existing methods for evaluating battery degeneration patterns are time-consuming and inefficient, particularly in determining lithium precipitation in secondary batteries, which affects performance and safety in module and pack units.
Innovation Solution
A method for manufacturing a degenerate cell by precipitating lithium metal on a desired region of the negative electrode through controlled charge and discharge conditions, including specific temperature, pressure, and charge/discharge patterns, allowing for rapid patterning of lithium precipitation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-quality hybrid seeds are produced through controlled cross-pollination, then genetic diversity and crop yield are improved, but the risk of unauthorized mixing with non-hybrid seeds and genetic contamination increases
Solution Approach 1:
A physical barrier structure (fence) is introduced as an intermediary element between male and female parent seed production fields to prevent unauthorized pollen flow and seed mixing. The fence acts as a mediator that maintains isolation without requiring complete geographical separation, thereby ensuring hybrid seed quality while reducing genetic contamination risk.
Solution Approach 2:
The seed production area is segmented into distinct male parent and female parent fields separated by physical barriers. This segmentation prevents mixing of seeds during harvest and storage operations, allowing independent management and verification of each parent line's purity, thus maintaining hybrid seed quality while preventing contamination.
2Productivity
If extensive land area is used for seed production to meet market demand, then productivity increases, but the complexity of quality control and contamination prevention increases
Solution Approach 1:
Large-scale seed production is divided into multiple smaller, isolated production units separated by physical barriers. Each unit can be independently managed and monitored, simplifying quality control procedures while maintaining overall high productivity. The segmentation allows for standardized isolation protocols to be applied across multiple sites.
Solution Approach 2:
The physical barrier system serves multiple functions simultaneously: it acts as a windbreak, a visual marker for field boundaries, and a physical prevention mechanism for seed and pollen mixing. This multi-functionality reduces the need for additional complex quality control infrastructure while maintaining productivity.
3Ease of manufacture
If traditional wind-based pollination is used for hybrid seed production, then the process is simple and cost-effective, but unauthorized cross-pollination and seed mixing cannot be prevented
Solution Approach 1:
Physical barriers (fences) are introduced as intermediaries between male and female parent fields to block unauthorized pollen flow while maintaining the natural wind-based pollination mechanism within each isolated field. This approach preserves the simplicity and cost-effectiveness of wind pollination while ensuring hybrid seed purity through spatial isolation.
Solution Approach 2:
The production system is segmented into isolated male and female parent fields using physical barriers, allowing wind-based pollination to occur independently within each field without cross-contamination. This segmentation maintains the ease of wind pollination while guaranteeing hybrid seed purity through physical separation.
Data Source
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Figure 4(a)~4(b)
AI summary
The present invention relates to a method for manufacturing a degenerate cell and a method for evaluating a degenerate cell including the same. The method for manufacturing a degenerate cell includes: preparing a battery cell which has a structure where an electrode assembly, which is generated by lamination of a negative electrode, a positive electrode, and a separator, is accommodated in a battery case, and an electrode lead is drawn out to an outside of the battery case; and precipitating lithium metal on a predetermined region between the negative electrode and the separator by performing charge and discharge under predetermined temperature, pressure and charge and discharge pattern conditions.