Technology · Solution
Cell-level Lifespan Prediction
Function
Cell degradation is quantitatively evaluated within a short time (under 1 minute)
by applying a DC pulse current and measuring DC voltage.
This process requires no additional equipment as PCS (ESS) or chargers (EV) can be utilized.
Improved accuracy of degradation analysis through temperature compensation
Visualization of battery rack degradation
Key features
Quantitative measurement of cell-level degradation using DC data
Accurate degradation correction values provided through temperature compensation
Visualization of degradation based on DC internal resistance analysis results
Expected benefits
Provision of precision diagnosis results using battery operational data
Degradation and fire risk assessment through statistical analysis
Cell-level minimum unit lifetime prediction utilizing precision diagnosis
Results
Regular precision diagnostic tests enable cell-level lifetime prediction
Precision diagnosis results
Changes in cell DC internal resistance after large-scale ESS operation
Demonstration results
- Comparison of precision diagnostic test results for 50MW utility-scale ESS
- Total of 125,400 cells (12.5 containers, 40ft) Short-duration analysis possible (1 minute per test)
- According to DC-IR statistical analysis, average increased by 18.5% / standard deviation increased by 53.6% → Increased dispersion indicates elevated fire risk
