Semi-supervised deep learning for lithium-ion battery state-of-health estimation using dynamic discharge profiles
Source abstract
Abstract
Data-driven methods for lithium-ion battery state-of-health (SoH) estimation gain attention for their ability to avoid acquiring prior battery mechanism knowledge. However, most existing methods require massive labeled data, unsuitable for dynamic conditions in the real world. In this study, extracting features from battery dynamic discharge profiles with a small amount of regularly calibrated data (1.5%–15% labeled) is used for capacity estimation. A semi-supervised deep-learning method based on bidirectional gate recurrent unit (biGRU) and structured kernel interpolation (SKI) Gaussian process regression (GPR) is proposed by employing three features: current rate, pseudo-differential voltage, and temperature. The capacity estimation error of a NASA randomized battery usage dataset is below 1.91% in root-mean-square percentage error (RMSPE). The proposed method is verified on three different random discharge datasets with RMSPE from 2.49% to 3.24%. It provides the feasibility of using dynamic data on battery SoH estimation in electric vehicle applications.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Battery Technologies Research · Advancements in Battery Materials · Fault Detection and Control Systems
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (54)
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