Meaning
Electrochemical analysis utilizes the derivative of the discharge curve to detect internal changes in electrode health. The use of voltage plateau diagnostics allows for the identification of specific phase transformations within the active material. This technique converts subtle slopes in the voltage profile into sharp peaks that are easier to quantify.
Incremental Capacity
Differentiating capacity with respect to voltage provides a signature of the electrochemical reactions occurring at the electrodes. Through voltage plateau diagnostics, shifts in the position or height of these peaks can indicate the loss of active material. This data is often used to distinguish between different degradation modes.
Phase Transition
Constant voltage regions in a charge curve correspond to the coexistence of two different crystal structures. Application of voltage plateau diagnostics reveals how these transitions change as a battery ages. If a plateau shortens, it suggests that part of the material is no longer participating in the lithium exchange.
Maintenance Benefit
Non-invasive monitoring of cell health is possible using data collected during normal operation. Voltage plateau diagnostics can be integrated into battery management systems to provide early warning of impending failure. This predictive capability reduces the need for physical inspections and helps in optimizing the replacement schedule for large energy storage systems.
Software algorithms track the degradation without requiring a full discharge.
