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学者姓名：王亚雄
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Abstract ：
The state-of-charge (SOC) and state-of-health (SOH) of lithium-ion batteries affect their operating performance and safety. The coupled SOC and SOH are difficult to estimate adaptively in multi-temperatures and aging. This paper proposes a novel transformer-embedded lithium-ion battery model for joint estimation of state-of-charge and state-of-health. The battery model is formulated across temperatures and aging, which provides accurate feedback for unscented Kalman filter-based SOC estimation and aging information. The open-circuit voltages (OCVs) are corrected globally by the temporal convolutional network with accurate OCVs in time-sliding windows. Arrhenius equation is combined with estimated SOH for temperature-aging migration. A novel transformer model is introduced, which integrates multiscale attention with the transformer’s encoder to incorporate SOC-voltage differential derived from battery model. This model simultaneously extracts local aging information from various sequences and aging channels using a self-attention and depth-separate convolution. By leveraging multi-head attention, the model establishes information dependency relationships across different aging levels, enabling rapid and precise SOH estimation. Specifically, the root mean square error for SOC and SOH under conditions of 15 °C dynamic stress test and 25 °C constant current cycling was less than 0.9% and 0.8%, respectively. Notably, the proposed method exhibits excellent adaptability to varying temperature and aging conditions, accurately estimating SOC and SOH. Graphical Abstract: (Figure presented.) © Youke Publishing Co.,Ltd 2024.
Keyword ：
Aging migration Aging migration Global correction Global correction Multiscale attention Multiscale attention State-of-charge (SOC) State-of-charge (SOC) State-of-health (SOH) State-of-health (SOH) Temperature Temperature Transformer Transformer
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| GB/T 7714 | Zhao, S.-Y. , Ou, K. , Gu, X.-X. et al. A novel transformer-embedded lithium-ion battery model for joint estimation of state-of-charge and state-of-health [J]. | Rare Metals , 2024 , 43 (11) : 5637-5651 . |
| MLA | Zhao, S.-Y. et al. "A novel transformer-embedded lithium-ion battery model for joint estimation of state-of-charge and state-of-health" . | Rare Metals 43 . 11 (2024) : 5637-5651 . |
| APA | Zhao, S.-Y. , Ou, K. , Gu, X.-X. , Dan, Z.-M. , Zhang, J.-J. , Wang, Y.-X. . A novel transformer-embedded lithium-ion battery model for joint estimation of state-of-charge and state-of-health . | Rare Metals , 2024 , 43 (11) , 5637-5651 . |
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Pressure and mass flow control in fuel cell air supply systems highly affect the dynamic performance, reliability, and efficiency of proton exchange membrane fuel cell vehicles (FCV). However, the coupling effect between pressure and mass flow makes their control difficult and can seriously compromise the performance of proton exchange membrane fuel cells. In this paper, the optimization diagonal matrix decoupling (DMD) is proposed to avoid the occurrence of detrimental operating conditions and improve performance. This study includes data-driven modeling of the air supply system with transfer functions and the analysis of the coupling mechanisms between pressure and mass flow. The simulation results show that the proposed strategy has good disturbance rejection and low coupling between flow and pressure. Compared with conventional DMD, the standard deviation of the relative control error of flow and pressure can be reduced by 9.7%, and 14.4% in the proposed strategy. The new contribution of this paper is to reveal the coupling mechanism, which can be used to guide the design of decoupling control strategies designed for air supply systems of fuel cell engines in FCV. IEEE
Keyword ：
Coupling mechanisms Coupling mechanisms Couplings Couplings Data-driven Data-driven Diagonal matrix decoupling Diagonal matrix decoupling Fuel cells Fuel cells Fuel cell vehicles Fuel cell vehicles Proton exchange membrane fuel cell Proton exchange membrane fuel cell Protons Protons Steady-state Steady-state Transfer functions Transfer functions Vehicle dynamics Vehicle dynamics
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| GB/T 7714 | Qiu, Y. , Zhang, C. , Hametner, C. et al. Coupling Mechanism Analysis and Decoupling Control of the Air Supply System for Fuel Cell Engine in Fuel Cell Vehicle [J]. | IEEE Transactions on Transportation Electrification , 2024 , 10 (4) : 1-1 . |
| MLA | Qiu, Y. et al. "Coupling Mechanism Analysis and Decoupling Control of the Air Supply System for Fuel Cell Engine in Fuel Cell Vehicle" . | IEEE Transactions on Transportation Electrification 10 . 4 (2024) : 1-1 . |
| APA | Qiu, Y. , Zhang, C. , Hametner, C. , Zeng, T. , Ferrara, A. , Wang, Y. et al. Coupling Mechanism Analysis and Decoupling Control of the Air Supply System for Fuel Cell Engine in Fuel Cell Vehicle . | IEEE Transactions on Transportation Electrification , 2024 , 10 (4) , 1-1 . |
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The optimal capacity of energy storage facilities is a cornerstone for the investment and low-carbon operation of integrated energy systems (IESs). However, the intermittence of renewable energy and the different operating characteristics of facilities present challenges to IES configuration. Therefore, a two-stage decision-making framework is developed to optimize the capacity of facilities for six schemes comprised of battery energy storage systems and hydrogen energy storage systems. The objectives considered are to minimize the levelized cost of electricity (LCOE), power abandonment rate (PAR) and maximize self-sufficiency rate (SSR) simultaneously. In the first stage, each scheme is solved using NSGA-II. In the second stage, the weights of objective function are determined by entropy weight method, while the optimal individual is selected from the Pareto solutions by the technique for order preference by similarity to ideal solution approach. Life models of battery, fuel cell, and electrolyzer are introduced to quantify device replacement costs. Meanwhile, carbon trading mechanisms and time-of-use tariffs are considered to assess environmental and economic benefits. The results show that the hydrogen-electric coupling scheme demonstrated superior performance, with LCOE, SSR, and PAR of 0.6416 ¥/kWh, 48.9 %, and 1.96 %, respectively, and the hydrogen storage tank is closely related to LCOE and PAR. © 2024 Elsevier Ltd
Keyword ：
Battery storage Battery storage Carbon Carbon Decision making Decision making Entropy Entropy Fuel cells Fuel cells Genetic algorithms Genetic algorithms Hydrogen storage Hydrogen storage Investments Investments
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| GB/T 7714 | Lin, Liangguang , Ou, Kai , Lin, Qiongbin et al. Two-stage multi-strategy decision-making framework for capacity configuration optimization of grid-connected PV/battery/hydrogen integrated energy system [J]. | Journal of Energy Storage , 2024 , 97 . |
| MLA | Lin, Liangguang et al. "Two-stage multi-strategy decision-making framework for capacity configuration optimization of grid-connected PV/battery/hydrogen integrated energy system" . | Journal of Energy Storage 97 (2024) . |
| APA | Lin, Liangguang , Ou, Kai , Lin, Qiongbin , Xing, Jianwu , Wang, Ya-Xiong . Two-stage multi-strategy decision-making framework for capacity configuration optimization of grid-connected PV/battery/hydrogen integrated energy system . | Journal of Energy Storage , 2024 , 97 . |
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The state of health (SOH) and remaining useful life (RUL) of lithium-ion batteries are crucial for health management and diagnosis. However, most data-driven estimation methods heavily rely on scarce labeled data, while traditional transfer learning faces challenges in handling domain shifts across various battery types. This paper proposes an enhanced vision-transformer integrating with semi-supervised transfer learning for SOH and RUL estimation of lithium-ion batteries. A depth-wise separable convolutional vision-transformer is developed to extract local aging details with depth-wise convolutions and establishes global dependencies between aging information using multi-head attention. Maximum mean discrepancy is employed to initially reduce the distribution difference between the source and target domains, providing a superior starting point for fine-tuning the target domain model. Subsequently, the abundant aging data of the same type as the target battery are labeled through semi-supervised learning, compensating for the source model's limitations in capturing target battery aging characteristics. Consistency regularization incorporates the cross-entropy between predictions with and without adversarial perturbations into the gradient backpropagation of the overall model. In particular, across the experimental groups 13–15 for different types of batteries, the root mean square error of SOH estimation was less than 0.66 %, and the mean relative error of RUL estimation was 3.86 %. Leveraging extensive unlabeled aging data, the proposed method could achieve accurate estimation of SOH and RUL. © 2024 The Authors
Keyword ：
Depth-wise separable convolutional vision-transformer Depth-wise separable convolutional vision-transformer Maximum mean discrepancy Maximum mean discrepancy Remaining useful life (RUL) Remaining useful life (RUL) Semi-supervised learning Semi-supervised learning State of health (SOH) State of health (SOH) Transfer learning Transfer learning
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| GB/T 7714 | Wang, Y.-X. , Zhao, S. , Wang, S. et al. Enhanced vision-transformer integrating with semi-supervised transfer learning for state of health and remaining useful life estimation of lithium-ion batteries [J]. | Energy and AI , 2024 , 17 . |
| MLA | Wang, Y.-X. et al. "Enhanced vision-transformer integrating with semi-supervised transfer learning for state of health and remaining useful life estimation of lithium-ion batteries" . | Energy and AI 17 (2024) . |
| APA | Wang, Y.-X. , Zhao, S. , Wang, S. , Ou, K. , Zhang, J. . Enhanced vision-transformer integrating with semi-supervised transfer learning for state of health and remaining useful life estimation of lithium-ion batteries . | Energy and AI , 2024 , 17 . |
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Given the serious net power decline and excessive mass of the system in heavy power fuel cells (FCs) operating at variable altitudes, optimizing and matching the appropriate air compressor of FC emerged as a prominent area of research. This study aims to perform multi-objective and multi-parameter optimization of the FC air loop to improve the performance of the FC system for heavy power under a variable altitude environment. Based on the experimental test data, combined with semi-empirical and semi-mechanism equations, five air compressor models with different power levels were developed, and their performance covered the altitude from 0 to 4000 m. Pareto theory is introduced to evaluate the three-dimensional objectives of cathode system mass, isentropic efficiency, and system net power under different air supply parameters and different power levels of air compressors. The Pareto front is solved by a multi-objective particle swarm optimization (MOPSO) algorithm under different altitudes. The results show that compared with the single-objective PSO with customized weight summation (PSO1 and PSO2), MOPSO improves 2.38% and 8.89% for net power, respectively. The three objectives for the optimized configuration are −12.20% (0.61%), 15.87% (27.40%), and 23.96% (−2.74%) improved than baseline1 (baseline2) for the 4000 m altitude. © 2024
Keyword ：
Air loop system Air loop system Fuel cell (FC) Fuel cell (FC) High altitude High altitude Multiple objectives optimization Multiple objectives optimization
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| GB/T 7714 | Chen, J. , He, H. , Zhang, Z. et al. Optimization and matching of the air loop system in a fuel cell for high-altitude application [J]. | International Journal of Hydrogen Energy , 2024 . |
| MLA | Chen, J. et al. "Optimization and matching of the air loop system in a fuel cell for high-altitude application" . | International Journal of Hydrogen Energy (2024) . |
| APA | Chen, J. , He, H. , Zhang, Z. , Wu, J. , Wang, Y.-X. . Optimization and matching of the air loop system in a fuel cell for high-altitude application . | International Journal of Hydrogen Energy , 2024 . |
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Abstract ：
Pressure and mass flow control in fuel cell air supply systems highly affect the dynamic performance, reliability, and efficiency of proton exchange membrane fuel cell vehicles (FCVs). However, the coupling effect between pressure and mass flow makes their control difficult and can seriously compromise the performance of proton exchange membrane fuel cells (PEMFCs). In this article, the optimization diagonal matrix decoupling (DMD) is proposed to avoid the occurrence of detrimental operating conditions and improve performance. This study includes data-driven modeling of the air supply system with transfer functions and the analysis of the coupling mechanisms between pressure and mass flow. The simulation results show that the proposed strategy has good disturbance rejection and low coupling between flow and pressure. Compared with conventional DMD, the standard deviation (std) of the relative control error of flow and pressure can be reduced by 9.7% and 14.4% in the proposed strategy. The new contribution of this article is to reveal the coupling mechanism, which can be used to guide the design of decoupling control strategies designed for air supply systems of fuel cell engines in FCV.
Keyword ：
Coupling mechanisms Coupling mechanisms Couplings Couplings data driven data driven diagonal matrix decoupling (DMD) diagonal matrix decoupling (DMD) Fuel cells Fuel cells Fuel cell vehicles Fuel cell vehicles proton exchange membrane fuel cell (PEMFC) proton exchange membrane fuel cell (PEMFC) Protons Protons Steady-state Steady-state Transfer functions Transfer functions Vehicle dynamics Vehicle dynamics
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| GB/T 7714 | Qiu, Yuqi , Zhang, Caizhi , Hametner, Christoph et al. Coupling Mechanism Analysis and Decoupling Control of the Air Supply System for Fuel Cell Engine in Fuel Cell Vehicle [J]. | IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION , 2024 , 10 (4) : 10059-10072 . |
| MLA | Qiu, Yuqi et al. "Coupling Mechanism Analysis and Decoupling Control of the Air Supply System for Fuel Cell Engine in Fuel Cell Vehicle" . | IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION 10 . 4 (2024) : 10059-10072 . |
| APA | Qiu, Yuqi , Zhang, Caizhi , Hametner, Christoph , Zeng, Tao , Ferrara, Alessandro , Wang, Yaxiong et al. Coupling Mechanism Analysis and Decoupling Control of the Air Supply System for Fuel Cell Engine in Fuel Cell Vehicle . | IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION , 2024 , 10 (4) , 10059-10072 . |
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Deep reinforcement learning (DRL) has been widely used in the field of automotive energy management. However, DRL is computationally inefficient and less robust, making it difficult to be applied to practical systems. In this article, a customized energy management strategy based on the deep reinforcement learning-model predictive control (DRL-MPC) self-regulation framework is proposed for fuel cell electric vehicles. The soft actor critic (SAC) algorithm is used to train the energy management strategy offline, which minimizes system comprehensive consumption and lifetime degradation. The trained SAC policy outputs the sequence of fuel cell actions at different states in the prediction horizon as the initial value of the nonlinear MPC solution. Under the MPC framework, iterative computation is carried out for nonlinear optimization problems to optimize action sequences based on SAC policy. In addition, the vehicle's usual operation dataset is collected to customize the update package for further improvement of the energy management effect. The DRL-MPC can optimize the SAC policy action at the state boundary to reduce system lifetime degradation. The proposed strategy also shows better optimization robustness than SAC strategy under different vehicle loads. Moreover, after the update package application, the total cost is reduced by 5.93% compared with SAC strategy, which has better optimization under comprehensive condition with different vehicle loads.
Keyword ：
Batteries Batteries Costs Costs Customized energy management Customized energy management Degradation Degradation Energy management Energy management fuel cell and battery degradation fuel cell and battery degradation fuel cell electric vehicle fuel cell electric vehicle Fuel cells Fuel cells model predictive control model predictive control Optimization Optimization reinforcement learning reinforcement learning State of charge State of charge
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| GB/T 7714 | Quan, Shengwei , He, Hongwen , Wei, Zhongbao et al. Customized Energy Management for Fuel Cell Electric Vehicle Based on Deep Reinforcement Learning-Model Predictive Control Self-Regulation Framework [J]. | IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS , 2024 , 20 (12) : 13776-13785 . |
| MLA | Quan, Shengwei et al. "Customized Energy Management for Fuel Cell Electric Vehicle Based on Deep Reinforcement Learning-Model Predictive Control Self-Regulation Framework" . | IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS 20 . 12 (2024) : 13776-13785 . |
| APA | Quan, Shengwei , He, Hongwen , Wei, Zhongbao , Chen, Jinzhou , Zhang, Zhendong , Wang, Ya-Xiong . Customized Energy Management for Fuel Cell Electric Vehicle Based on Deep Reinforcement Learning-Model Predictive Control Self-Regulation Framework . | IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS , 2024 , 20 (12) , 13776-13785 . |
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Accurate estimations of the state of charge (SOC) and state of health (SOH) are crucial for improving battery management techniques. However, batteries are affected by temperature and aging, leading to nonlinear relationships that are more difficult to be characterized. This article proposes an SOC-SOH joint estimation method of lithium-ion battery based on temperature-dependent extended Kalman filter (EKF) and deep learning. First, the battery model state, control, and observation matrices with temperature and capacity variables are created for real-time SOC estimation by using EKF at the local end. Second, battery aging features are extracted and weighted using convolutional neural networks (CNNs) and attention mechanisms and are combined with a gated unit to solve long time series memory problem for SOH estimation at remote computing platform. Finally, the dual time-scale joint model is realized by real-time SOC estimation on the local controller, and the SOH can be calculated on the remote computing platform to correct the available capacity to further update SOC at the end of the discharge. Through 1C discharge rate cycle experimental validation, the root mean square errors of SOC and SOH estimation were within 1%. Therefore, the proposed joint SOC-SOH estimation method can be achieved with local and remote computation.
Keyword ：
Aging Aging Discharges (electric) Discharges (electric) Estimation Estimation Hybrid neural networks Hybrid neural networks joint estimation joint estimation Lithium-ion batteries Lithium-ion batteries lithium-ion battery lithium-ion battery local and remote computing platforms local and remote computing platforms state of charge (SOC) state of charge (SOC) state of health (SOH) state of health (SOH) Temperature measurement Temperature measurement Voltage measurement Voltage measurement
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| GB/T 7714 | Wang, Shiquan , Ou, Kai , Zhang, Wei et al. An SOC and SOH Joint Estimation Method of Lithium-Ion Battery Based on Temperature-Dependent EKF and Deep Learning [J]. | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS , 2024 , 72 (1) : 570-579 . |
| MLA | Wang, Shiquan et al. "An SOC and SOH Joint Estimation Method of Lithium-Ion Battery Based on Temperature-Dependent EKF and Deep Learning" . | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 72 . 1 (2024) : 570-579 . |
| APA | Wang, Shiquan , Ou, Kai , Zhang, Wei , Wang, Ya-Xiong . An SOC and SOH Joint Estimation Method of Lithium-Ion Battery Based on Temperature-Dependent EKF and Deep Learning . | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS , 2024 , 72 (1) , 570-579 . |
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Abstract ：
The optimal capacity of energy storage facilities is a cornerstone for the investment and low-carbon operation of integrated energy systems (IESs). However, the intermittence of renewable energy and the different operating characteristics of facilities present challenges to IES configuration. Therefore, a two-stage decision-making framework is developed to optimize the capacity of facilities for six schemes comprised of battery energy storage systems and hydrogen energy storage systems. The objectives considered are to minimize the levelized cost of electricity (LCOE), power abandonment rate (PAR) and maximize self-sufficiency rate (SSR) simultaneously. In the first stage, each scheme is solved using NSGA-II. In the second stage, the weights of objective function are determined by entropy weight method, while the optimal individual is selected from the Pareto solutions by the technique for order preference by similarity to ideal solution approach. Life models of battery, fuel cell, and electrolyzer are introduced to quantify device replacement costs. Meanwhile, carbon trading mechanisms and time-of-use tariffs are considered to assess environmental and economic benefits. The results show that the hydrogen-electric coupling scheme demonstrated superior performance, with LCOE, SSR, and PAR of 0.6416 & YEN;/kWh, 48.9 %, and 1.96 %, respectively, and the hydrogen storage tank is closely related to LCOE and PAR.
Keyword ：
Battery energy storage system Battery energy storage system Configuration optimization Configuration optimization Entropy weight method Entropy weight method Hydrogen energy storage system Hydrogen energy storage system ideal solution ideal solution Non-dominated sorting genetic algorithm-II Non-dominated sorting genetic algorithm-II Technique for order preference by similarity to Technique for order preference by similarity to
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| GB/T 7714 | Lin, Liangguang , Ou, Kai , Lin, Qiongbin et al. Two-stage multi-strategy decision-making framework for capacity configuration optimization of grid-connected PV/battery/hydrogen integrated energy system [J]. | JOURNAL OF ENERGY STORAGE , 2024 , 97 . |
| MLA | Lin, Liangguang et al. "Two-stage multi-strategy decision-making framework for capacity configuration optimization of grid-connected PV/battery/hydrogen integrated energy system" . | JOURNAL OF ENERGY STORAGE 97 (2024) . |
| APA | Lin, Liangguang , Ou, Kai , Lin, Qiongbin , Xing, Jianwu , Wang, Ya-Xiong . Two-stage multi-strategy decision-making framework for capacity configuration optimization of grid-connected PV/battery/hydrogen integrated energy system . | JOURNAL OF ENERGY STORAGE , 2024 , 97 . |
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Abstract ：
The state-of-charge (SOC) and state-of-health (SOH) of lithium-ion batteries affect their operating performance and safety. The coupled SOC and SOH are difficult to estimate adaptively in multi-temperatures and aging. This paper proposes a novel transformer-embedded lithium-ion battery model for joint estimation of state-of-charge and state-of-health. The battery model is formulated across temperatures and aging, which provides accurate feedback for unscented Kalman filter-based SOC estimation and aging information. The open-circuit voltages (OCVs) are corrected globally by the temporal convolutional network with accurate OCVs in time-sliding windows. Arrhenius equation is combined with estimated SOH for temperature-aging migration. A novel transformer model is introduced, which integrates multiscale attention with the transformer's encoder to incorporate SOC-voltage differential derived from battery model. This model simultaneously extracts local aging information from various sequences and aging channels using a self-attention and depth-separate convolution. By leveraging multi-head attention, the model establishes information dependency relationships across different aging levels, enabling rapid and precise SOH estimation. Specifically, the root mean square error for SOC and SOH under conditions of 15 degrees C dynamic stress test and 25 degrees C constant current cycling was less than 0.9% and 0.8%, respectively. Notably, the proposed method exhibits excellent adaptability to varying temperature and aging conditions, accurately estimating SOC and SOH.
Keyword ：
Aging migration Aging migration Global correction Global correction Multiscale attention Multiscale attention State-of-charge (SOC) State-of-charge (SOC) State-of-health (SOH) State-of-health (SOH) Temperature Temperature Transformer Transformer
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| GB/T 7714 | Zhao, Shang-Yu , Ou, Kai , Gu, Xing-Xing et al. A novel transformer-embedded lithium-ion battery model for joint estimation of state-of-charge and state-of-health [J]. | RARE METALS , 2024 , 43 (11) : 5637-5651 . |
| MLA | Zhao, Shang-Yu et al. "A novel transformer-embedded lithium-ion battery model for joint estimation of state-of-charge and state-of-health" . | RARE METALS 43 . 11 (2024) : 5637-5651 . |
| APA | Zhao, Shang-Yu , Ou, Kai , Gu, Xing-Xing , Dan, Zhi-Min , Zhang, Jiu-Jun , Wang, Ya-Xiong . A novel transformer-embedded lithium-ion battery model for joint estimation of state-of-charge and state-of-health . | RARE METALS , 2024 , 43 (11) , 5637-5651 . |
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