通过对比学习建模电池退化,实现跨化学体系的零样本预测。
ACCEPT: Diagnostic Forecasting of Battery Degradation Through Contrastive Learning
- 利用对比学习关联物理退化参数与可测运行数据
- 在加速退化场景下仍保持高精度预测能力
- 支持不同电池化学体系的泛化,适合电动车与储能系统
锂离子电池(LIB)退化建模可显著降低电动汽车(EV)和电池储能系统(BESS)的成本,并提升安全性和可靠性。尽管数据驱动方法在退化预测中备受关注,但其泛化能力有限,在加速退化等关键场景下表现不佳,且难以揭示退化成因。物理模型虽具深度理解优势,但参数复杂、不确定性高,限制了实际应用。为此,我们提出新模型ACCEPT:通过对比学习映射物理退化参数与可观测运行量之间的关系,融合两类方法优点。由于相同化学体系电池具有相似退化路径,该模型可非平凡地迁移至多数下游任务,实现零样本推理。此外,模型支持包含类别特征,具备向其他电池化学体系泛化的能力。本工作建立了一个基础性电池退化模型,可在多种电池类型与工况下提供可靠预测。
原文摘要 · Abstract (English)
Modeling lithium-ion battery (LIB) degradation offers significant cost savings and enhances the safety and reliability of electric vehicles (EVs) and battery energy storage systems (BESS). Whilst data-driven methods have received great attention for forecasting degradation, they often demonstrate limited generalization ability and tend to underperform particularly in critical scenarios involving accelerated degradation, which are crucial to predict accurately. These methods also fail to elucidate the underlying causes of degradation. Alternatively, physical models provide a deeper understanding, but their complex parameters and inherent uncertainties limit their applicability in real-world settings. To this end, we propose a new model - ACCEPT. Our novel framework uses contrastive learning to map the relationship between the underlying physical degradation parameters and observable operational quantities, combining the benefits of both approaches. Furthermore, due to the similarity of degradation paths between LIBs with the same chemistry, this model transfers non-trivially to most downstream tasks, allowing for zero-shot inference. Additionally, since categorical features can be included in the model, it can generalize to other LIB chemistries. This work establishes a foundational battery degradation model, providing reliable forecasts across a range of battery types and operating conditions.
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