Driving behavior-guided battery health monitoring for electric vehicles using machine learning

• URL: http://arxiv.org/abs/2309.14125v1
• Date: Mon, 25 Sep 2023 13:24:53 GMT
• Title: Driving behavior-guided battery health monitoring for electric vehicles using machine learning
• Abstract summary: We propose a feature-based machine learning pipeline for reliable battery health monitoring. We first summarized and analyzed various individual health indicators (HIs) with mechanism-related interpretations. All features were carefully evaluated and screened based on estimation accuracy and correlation analysis.
• Score: 7.6366651125971945
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: An accurate estimation of the state of health (SOH) of batteries is critical to ensuring the safe and reliable operation of electric vehicles (EVs). Feature-based machine learning methods have exhibited enormous potential for rapidly and precisely monitoring battery health status. However, simultaneously using various health indicators (HIs) may weaken estimation performance due to feature redundancy. Furthermore, ignoring real-world driving behaviors can lead to inaccurate estimation results as some features are rarely accessible in practical scenarios. To address these issues, we proposed a feature-based machine learning pipeline for reliable battery health monitoring, enabled by evaluating the acquisition probability of features under real-world driving conditions. We first summarized and analyzed various individual HIs with mechanism-related interpretations, which provide insightful guidance on how these features relate to battery degradation modes. Moreover, all features were carefully evaluated and screened based on estimation accuracy and correlation analysis on three public battery degradation datasets. Finally, the scenario-based feature fusion and acquisition probability-based practicality evaluation method construct a useful tool for feature extraction with consideration of driving behaviors. This work highlights the importance of balancing the performance and practicality of HIs during the development of feature-based battery health monitoring algorithms.

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