How do battery degradation modes affect the health of a battery?

The degradation modes of the battery cells, e.g., loss of active material and loss of lithium inventory, further deliver information regarding aging mechanisms and can be predicted as health indicators.

How do lithium ion batteries degrade?

Understanding the underlying physics of battery degradation and leveraging advanced estimation techniques are key to optimizing battery performance and extending its lifespan. Lithium-ion batteries degrade primarily through two mechanisms: the loss of lithium inventory (LLI) and the loss of active material (LAM).

What causes a battery to lose active material?

The loss of active material (LAM) occurs due to mechanical stresses within the battery, particularly in the electrodes during cycling.

What causes a battery to lose performance?

Additionally, loss of electrolyte (LE) and increased internal resistance (IR) are also important modes that lead to the decline of battery performance. For commercial LIBs, LAM includes graphite exfoliation, transition metal dissolution, active particle shedding and cracking, phase transition, etc.

What are battery degradation modes based on Aging mechanisms?

According to the aging mechanisms, battery degradation modes are mainly divided into two categories: loss of lithium inventory (LLI) and loss of active materials (LAM), which are the main factors leading to battery performance degradation.

What are the benefits of a multi-feature battery degradation prediction system?

End-to-end solution for multi-feature battery degradation prediction. Accurate early-life prediction ability for both capacity and power fade. Prediction accuracy improvement at most degradation indicators. 50% computational cost reduction compared to single-task learning models. High robustness under industry-level battery diagnosis errors.