Lithium Mimic Battery Mock-Ups for Ambient Electromagnetic Testing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Lithium metal battery cells are unstable and reactive in atmospheric conditions, making it difficult to effectively test electromagnetic testing technologies, as they react with water vapor and cannot be handled outside a glovebox, limiting the evaluation of non-destructive testing methods.
Innovation Solution
A lithium metal mimic layer, made from non-reactive metals like indium, tin, iron, chromium, or their alloys, is used to create mock-up samples that mimic the lithium metal layer, allowing for non-destructive electromagnetic testing in ambient conditions, using methods such as additive manufacturing, coating, or lamination, and eddy current probing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lithium metal layer is used in battery cell testing, then the testing reflects real battery conditions, but the lithium metal reacts with water vapor in atmospheric conditions making handling and testing difficult
Solution Approach 1:
The patent creates a mock-up sample that copies the essential electromagnetic characteristics of the lithium metal layer without using actual lithium metal. The mock-up includes a current collector and an active material layer with electromagnetic properties matching those of lithium metal, enabling testing in atmospheric conditions while maintaining testing validity for electromagnetic methods
Solution Approach 2:
The patent introduces a mock-up sample as an intermediary between the testing system and the actual lithium metal battery. This intermediary allows electromagnetic testing to be performed in atmospheric conditions while still providing meaningful data about the electromagnetic characteristics of lithium metal layers
2Reliability
If lithium metal layer is used in battery cell testing, then the testing reflects real battery conditions, but the battery cell must be kept in a glovebox limiting testing locations and efficiency
Solution Approach 1:
The mock-up sample copies the electromagnetic behavior of lithium metal layers, allowing testing to be performed anywhere in the facility without requiring a glovebox environment. This dramatically improves testing efficiency by eliminating the need for specialized atmospheric control facilities while maintaining testing reliability for electromagnetic methods
3Reliability
If lithium metal layer is used in battery cell testing, then the testing reflects real battery conditions, but the reactive nature of lithium metal limits the types of electromagnetic tests that can be performed
Solution Approach 1:
The mock-up sample replicates the electromagnetic properties of lithium metal layers, enabling a wide variety of electromagnetic testing methods including eddy current testing, electromagnetic resonance, and other non-destructive testing techniques to be performed without the constraints of lithium metal reactivity
Solution Approach 2:
The patent changes the material parameter from reactive lithium metal to non-reactive mock-up materials that maintain the same electromagnetic characteristics, thereby expanding the range of testable conditions and methods while preserving testing validity
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
Enables the validation of electromagnetic testing technologies in atmospheric conditions, simulating defects and failure modes of lithium metal anodes, and allows for the detection of characteristics like thickness variations and contamination without the need for a glovebox, improving the testing efficiency and reliability of battery cells.
Implementation Method 1
The electromagnetic test comprises sensing an electromagnetic parameter of the mock-up sample using an eddy current probe
Data Source
AI summary
A method for validating non-destructive, electromagnetic methods in atmospheric conditions of a battery cell intended to include a lithium metal layer includes selecting a lithium mimic metal layer to replace the lithium metal layer; and creating a mock-up sample including one or more layers of the battery cell. One or more layers comprise the lithium mimic metal layer. The method includes performing electromagnetic testing of the mock-up sample.