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To address the issue that existing supervised learning methods for estimating the battery State of Health (SOH) rely on scarce labeled data while neglecting the abundance of easily obtainable unlabeled data, a joint SOH estimation method based on Long Short-Term Memory (LSTM) and Gated Recurrent Unit (GRU) within a Semi-Supervised Learning (SSL) framework is proposed. First, three interpretable health indicators are extracted from the charging voltage to accurately describe battery degradation. Then, based on SSL, pseudo-labels for unlabeled data are predicted to augment the training samples, thereby enhancing the generalization capability of the model. Analysis and experiments demonstrate that the proposed SSL-based method significantly improves SOH estimation performance, with an average Root Mean Square Error (RMSE) below 1.2%.

, authors=Yaping Qin1, Liuyang Ning2, authorsList=Yaping Qin, Liuyang Ning, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1309639641725236043, articleId=1309639639577752393, tenantId=1146029695717560320, journalId=1189621681917173762, language=CN, title=基于半监督学习的集成模型估计电动汽车锂电池健康状态, columnId=1309639625430364898, journalTitle=汽车技术, columnName=智能汽车全栈环境感知技术专题, runingTitle=null, highlight=null, articleAbstract=

为解决现有的监督学习方法估计电池健康状态(SOH)时依赖于稀少的标记数据,而忽略了大量易获得的未标记数据这一问题,提出了基于长短期记忆(LSTM)网络和门控循环单元(GRU)的半监督学习(SSL)的联合SOH估计方法。首先,从充电电压中提取了3种具有可解释性的健康因子,用于准确描述电池退化;然后,基于SSL对未标记数据的伪标签进行预测,旨在增强训练样本,从而提升模型泛化能力。分析和试验表明,提出的基于SSL的方法可以显著提高SOH估计性能,平均均方根误差不超过1.2%。

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基于半监督学习的集成模型估计电动汽车锂电池健康状态
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秦亚萍 1 , 宁留洋 2
汽车技术 | 智能汽车全栈环境感知技术专题 2026,(5): 48-55
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汽车技术 |智能汽车全栈环境感知技术专题 2026 , (5) : 48 -55
基于半监督学习的集成模型估计电动汽车锂电池健康状态
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秦亚萍1, 宁留洋2
作者信息
  • 1.开封大学智能制造学院,开封 475000
  • 2.湖南交通工程学院机电工程学院,衡阳 421001
Estimation of Lithium-Ion Battery State of Health in Electric Vehicles Using an Ensemble Model Based on Semi-Supervised Learning
Yaping Qin1, Liuyang Ning2
Affiliations
  • 1.School of Intelligent Manufacturing, Kaifeng University, Kaifeng 475000
  • 2.College of Electromechanical Engineering, Hunan Institute of Traffic Engineering, Hengyang 421001
出版时间: 2026-05-24 doi: 10.19620/j.cnki.1000-3703.20250545
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为解决现有的监督学习方法估计电池健康状态(SOH)时依赖于稀少的标记数据,而忽略了大量易获得的未标记数据这一问题,提出了基于长短期记忆(LSTM)网络和门控循环单元(GRU)的半监督学习(SSL)的联合SOH估计方法。首先,从充电电压中提取了3种具有可解释性的健康因子,用于准确描述电池退化;然后,基于SSL对未标记数据的伪标签进行预测,旨在增强训练样本,从而提升模型泛化能力。分析和试验表明,提出的基于SSL的方法可以显著提高SOH估计性能,平均均方根误差不超过1.2%。

健康状态  /  可解释健康指标  /  半监督学习  /  集成模型

To address the issue that existing supervised learning methods for estimating the battery State of Health (SOH) rely on scarce labeled data while neglecting the abundance of easily obtainable unlabeled data, a joint SOH estimation method based on Long Short-Term Memory (LSTM) and Gated Recurrent Unit (GRU) within a Semi-Supervised Learning (SSL) framework is proposed. First, three interpretable health indicators are extracted from the charging voltage to accurately describe battery degradation. Then, based on SSL, pseudo-labels for unlabeled data are predicted to augment the training samples, thereby enhancing the generalization capability of the model. Analysis and experiments demonstrate that the proposed SSL-based method significantly improves SOH estimation performance, with an average Root Mean Square Error (RMSE) below 1.2%.

State of health  /  Explainable health indicators  /  Semi-Supervised learning  /  Integrated model
秦亚萍, 宁留洋. 基于半监督学习的集成模型估计电动汽车锂电池健康状态. 汽车技术, 2026 , (5) : 48 -55 . DOI: 10.19620/j.cnki.1000-3703.20250545
Yaping Qin, Liuyang Ning. Estimation of Lithium-Ion Battery State of Health in Electric Vehicles Using an Ensemble Model Based on Semi-Supervised Learning[J]. Automobile Technology, 2026 , (5) : 48 -55 . DOI: 10.19620/j.cnki.1000-3703.20250545
  • 湖南省教育厅科学研究项目(22C0935)
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doi: 10.19620/j.cnki.1000-3703.20250545
  • 首发时间:2026-09-23
  • 出版时间:2026-05-24
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  • 修回日期:2025-08-31
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湖南省教育厅科学研究项目(22C0935)
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    1.开封大学智能制造学院,开封 475000
    2.湖南交通工程学院机电工程学院,衡阳 421001
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2种不同金属材料的力学参数
科
Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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