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26th International Conference on Electrical Machines and Systems, ICEMS 2023

作者： Li, Zhuohao Shi, Qionglin Xia, Junyi Wang, Kangli Jiang, Kai Huazhong University of Science and Technology School of Electrical and Electronic Engineering Wuhan China Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350317589

As an important energy storage technology, lithium-ion batteries are widely used in various industrial fields, effectively alleviating the pressure of energy transition and environmental pollution. In order to ensure the safe and efficient long-term service of lithium-ion batteries, it is particularly important to accurately estimate the remaining useful life (RUL). In this paper, a novel method based on stacking model is proposed for predicting the RUL of lithium-ion batteries. Firstly, multiple health features are extracted from capacity, voltage curve, and capacity-voltage curve. Then their correlations with RUL are analyzed using state of Health (SOH), current charging time, discharge time to 3.8v, discharge time to 3.35v, discharge time in the voltage range of 3.35v-3.8v and voltage at the turning point of the charging capacity-voltage curve of lithium-ion batteries. Next, a stacking model including gradient boosting decision tree, support vector regression, random forest and multiple linear regression is constructed. Finally, to validate the accuracy of the proposed method, it is applied to batteries from the Hawaii Natural Energy Institute (HNEI) dataset, and compared with the performance of individual model. The results show that the RUL prediction error of the proposed method is only 11.3, which has a high accuracy. © 2023 IEEE.

关键词： Lithium-ion batteries

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In-situ polymerized carbonate induced by Li-Ga alloy as novel artificial interphase on Li metal anode

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Chinese Chemical Letters 2023年第9期34卷 294-299页

作者： Ziping Wang Shuyuan Xie Xuejie Gao Xinyang Chen Lina Cong Jun Liu Haiming Xie Chuang Yu Yulong Liu School of Chemistry Northeast Normal UniversityChangchun 130024China Center for Lignocellulosic Chemistry and Biomaterials College of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian 116034China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Li metal is considered an ideal anode material because of its high theoretical capacity and low electrode ***,the practical usage of Li metal as an anode is severely limited because of inevitable parasitic side reactions with electrolyte and dendrites *** present,single-component artificial solid electrolyte interphase cannot simultaneously meet the multiple functions of promoting ion conduction,guiding lithium ion deposition,inhibiting dendrite growth,and reducing interface side ***,multi-component design on Li metal surface is widely investigated to achieve long-term ***,we report a Li_(2)Ga-carbonate polymer interphase layer to solve volume changes,Li dendrites formation and *** a result,the Li symmetric cell can be stabilized at 3.0 m A/cm^(2)in carbonate electrolyte with limited volume of 20μ*** with 13.6 mg/cm^(2)(loading of 2 mAh/cm^(2))LiFePO_(4)cathode,discharge capacity retains at 90%for over 150 cycles under limited electrolyte *** such an alloy-polymer interphase layer,higher energy density Li metal batteries become prominent in the near future.

关键词： Lithium metal Alloy Polymer film High energy density Self-healing

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Capacity estimation based on the aging characteristics analysis of Liquid metal batteries 11

Capacity estimation based on the aging characteristics analy...

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11th International Conference on Power Electronics - ECCE Asia, ICPE 2023-ECCE Asia

作者： Shi, Qionglin Li, Haomiao Wang, Kangli Jiang, Kai Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology China Huazhong University of Science and Technology Engineering Research Center of Power Safety and Efficiency China

ISBN: (纸本)9788957083505

The liquid metal battery is a new energy storage technology that is gaining increasing attention due to its high safety and long life. Accurate capacity estimation is crucial for health diagnosis and pack management, providing a strong guarantee of long-term stable operation for energy systems. However, owing to the lack of aging analysis traditional methods are difficult to improve the precision in the situation of unpredictable disturbances or fluctuations, such as capacity plunge. This paper proposes a capacity estimation method based on aging features by combining machine learning and filter algorithms, this method can provide an accurate prediction even the LMB is subject to capacity plunge. First, the aging features are extracted using only a tenth of the whole information from the discharge curve and increment capacity (IC) curve. Next, the Long Short Term Memory (LSTM) network is employed to establish the state-space representation between the aging feature and the capacity. The particle filter (PF) is then combined with the state-space representation to predict the capacity. Finally, aging tests are conducted to validate the precision and effectiveness of the proposed hybrid method. These results show that the proposed method can provide robustness as well as accurate capacity prediction. © 2023 The Korean Institute of Power Electronics.

关键词： Liquid metals

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Research on Capacity Configuration Method of Underwater Compressed Air Energy Storage Considering Offshore Wind Power 4

Research on Capacity Configuration Method of Underwater Comp...

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4th International Conference on Energy engineering and Power Systems, EEPS 2024

作者： Shao, Ming Lou, Suhua Wu, Yaowu Lin, Yong Wu, Weijie Zuo, Zhengmin Liu, Peiyu Mo, Mingshan Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan430074 China Power grid planning research center Guangdong power grid corporation Guangzhou China

ISBN: (纸本)9798350366914

In order to cope with the challenges brought by the volatility and randomness of new energy output such as offshore wind power, underwater compressed air energy storage (UCAES) has been widely concerned and has broad development and application prospects. A capacity configuration model of underwater air compressor considering offshore wind power is presented in this paper. Firstly, the model of underwater compressed air energy storage and wind power output is established. Then, the capacity optimization configuration model of UCAES is constructed with the goal of optimal economic benefit. Finally, the model is analyzed according to the solving results, and the results show that the validity of the model is verified. © 2024 IEEE.

关键词： Windmill

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Inductor Multiplexing Equalization Circuit with Fuzzy Controller for Lithium Battery Equalization 5

Inductor Multiplexing Equalization Circuit with Fuzzy Contro...

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5th IEEE International Electrical and Energy Conference, CIEEC 2022

作者： Yuan, Aote Cai, Tao Xie, Jia Huazhong Univesity of Science and Technology The State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (数字)9781665411042

ISBN: (纸本)9781665411042

In this paper, an inductor multiplexing equalization for Li-ion battery is designed. Compared with the typical inductor equalization circuit, it can reduce the number of inductors and circuit volume. Then, a fuzzy controller based on balancing time and loss is designed. Simulation experiments on typical inductor equalization circuit and inductor multiplexing equalization circuit are carried out. The simulation results show that the inductor multiplexing equalization circuit based on the fuzzy control strategy has faster equalization speed and higher equalization accuracy. © 2022 IEEE.

关键词： Fuzzy control

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Asymmetric Feedforward Compensation For 3-Phase Coupled Buck-Boost Converter 5

Asymmetric Feedforward Compensation For 3-Phase Coupled Buck...

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5th IEEE International Electrical and Energy Conference, CIEEC 2022

作者： Han, Fu Shanxu, Duan Tao, Cai Junyang, Bao Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (数字)9781665411042

ISBN: (纸本)9781665411042

In this paper, asymmetric operation of the 3-phase coupled buck-boost converter is analyzed. The form and solution process of the asymmetric operation are complicate, but the solution can be expressed and calculated in a simple form. By using parallel feedforward control, the dynamic performance of 3-phase coupled buck-boost converter can be improved obviously. Accuracy and effectiveness of the analysis and calculation are verified with the results of simulation and experiments. © 2022 IEEE.

关键词： Buck-Boost converter

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Attention Pyramid Dilated Region-based Model for Metallurgical Defect Detection

Attention Pyramid Dilated Region-based Model for Metallurgic...

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2024 International Conference on Computational Intelligence and Communication System, CCICS 2024

作者： Cheng, Danpeng Sha, Wuxin Xu, Zuo Huang, Lixin Zhang, Zhendong Du, Yunpeng Zhu, Zhihua Cao, Yuan-Cheng State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China CITIC Dicastal Co. Ltd. Qinhuangdao066011 China

Defect recognition is the key to realizing automatic visual inspection and quality control in intelligent manufacturing. Deep learning (DL) has been widely applied to locate damaged areas in images, characterize impurities of materials and further analyze the quality of products. However, automatic defect detection by DL in practical industrial applications is still a challenge due to the lack of sufficient datasets and appropriate recognition methods. Here, a novel Attention Pyramid Dilated Region-based Convolutional Neural Network (ADRCNN) is proposed to realize the multi-scale defect recognition and pixel-level instance segmentation of metallographic images. We also collected a dataset containing 900 images of commercial A356 aluminum alloy with different casting defects. The ADRCNN model is evaluated on our dataset with an average detection accuracy of 87.2% and 93.3% on validation and test sets respectively. To address the overfitting problem, a pretraining fine-tuning strategy is implemented by using the pretraining weights from large-scale datasets and temporarily freezing the weights of the backbone network during the training process. The experimental results show that the proposed model can achieve satisfactory defect segmentation in metallographic images, promoting the development of intelligent manufacturing in alloy industries. © Published under licence by IOP Publishing Ltd.

关键词： Aluminum alloys

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Fluorobenzene diluted low-density electrolyte for high-energy density and high-performance lithium-sulfur batteries

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Journal of Energy Chemistry 2022年第5期31卷 752-761页

作者： Zhilong Han Shuping Li Mengjun Sun Renjie He Wei Zhong Chuang Yu Shijie Cheng Jia Xie State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina School of Physics Huazhong University of Science and TechnologyWuhan 430074HubeiChina State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina

The mass fraction of electrolytes is the crucial factor affecting the energy density of lithium-sulfur(Li-S)batteries. Due to the high porosity within the C/S cathode, high concentration of polysulfides, and side reaction in lithiun metal anode under lean electrolyte, it is extremely challenging to improve performance while reducing the electrolyte volume. Here, we report a novel electrolyte with relatively low density(1.16 g cm^(-2)), low viscosity(1.84 m Pa s), and high ionic conductivity, which significantly promotes energy density and cyclability of Li-S batteries under practical conditions. Moreover, such electrolyte enables a hybrid cathode electrolyte interphase(CEI) and solid electrolyte interface(SEI) layer with plentiful Li F, which leads to fast kinetics of ions transport and stable cyclability even under low *** to Li-S batteries in electrolyte employing 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoropropyl ether(TTE) diluent, the ultra-thick cathode(20 mg cm^(-2)) shows a high capacity of 9.48 m Ah cm^(-2)and excellent capacity retention of 80.3% over 191 cycles at a low electrolyte-to-sulfur ratio(E/S = 2) and negative-to-positive capacity ratio(N/P = 2.5), realizing a 19.2% improvement in energy density in coin cells(from 370 to 441 Wh kg^(-1)) and a high energy density up to 467 Wh kg^(-1) in pouch cells. This study not only provides guidance for the electrolyte design but also paves the way for the development of high performance Li-S batteries under practical conditions.

关键词： High energy density Lithium-sulfur battery Thick sulfur electrode Lean electrolyte Low-density electrolyte

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Exploration of the application of stellarator-like external rotational transform on the J-TEXT tokamak 50

Exploration of the application of stellarator-like external ...

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50th EPS Conference on Plasma Physics, EPS 2024

作者： Li, Y.B. Rao, B. Wang, N.C. Mao, F.Y. Li, K.Z. Zhou, S. Jiang, Z.H. Ding, Y.H. Suzuki, Y. International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Technology China Graduate School of Advanced Science and Engineering Hiroshima University Higashi-Hiroshima739-8527 Japan

ISBN: (纸本)9798331305239

The major disruption of tokamak plasma poses a great threat to safe operation of the device. Future fusion reactors are intolerant of major disruption, so developing control methods are crucial for disruption mitigation. Previous experiments on current-carrying stellarators and hybrid devices have demonstrated the potential for disruption avoidance and suppression of Magnetohydrodynamic (MHD) activity on tokamak by introducing increasing levels of rotational transform from stellarator- like helical coils. To explore innovative approaches for optimizing tokamak configurations and combining the strengths of both tokamaks and stellarators, a set of 3D External Rotational Transform (ERT) coil system has been designed and installed in the J-TEXT tokamak. The ERT coil system consists of two helical coils and is installed inside the vacuum vessel. Simulation results, via HINT2 and MIPS, indicate that the application of ERT coils results in hybrid configurations, which lead to non-axisymmetric plasma shapes, modification of the q profile, and improvement in plasma stability. The successfully installation of the ERT coil system on J-TEXT has yielded preliminary experimental results that align with the design objectives. © 2024 50th EPS Conference on Plasma Physics, EPS 2024. All rights reserved.

关键词： Stellarators

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Design and development of the beamline for a proton therapy system

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Nuclear Science and Techniques 2021年第12期32卷 53-63页

作者： Bin Qin Xu Liu Qu-Shan Chen Dong Li Wen-Jie Han Ping Tan Zhong-Qi Zhang Chong Zhou Ao-Te Chen Yi-Cheng Liao Wei Wang State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina

A proton therapy(PT)facility with multiple treatment rooms based on the superconducting cyclotron scheme is under development at Huazhong University of Science and technology(HUST).This paper attempts to describe the design considerations and implementation of the PT beamline from a systematic *** considerations covering beam optics and the influence of high-order aberrations,beam energy/intensity modulation,and beam orbit correction are *** addition to the technical implementation of the main beamline components and subsystems,including the energy degrader,fast kicker,beamline magnets,beam diagnostic system,and beamline control system are introduced.

关键词： Proton therapy Beamline Beam optics Beam energy/intensity modulation

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