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Recent advances in Industrial Internet:insights and challenges

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Digital Communications and Networks 2020年第1期6卷 1-13页

作者： Wei Qin siqi chen Mugen Peng State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing100876China

The Industrial Internet is a promising technology combining industrial systems with Internet connectivity to significantly improve the product efficiency and reduce production cost by cooperating with intelligent devices,in which the advanced computing,big data analysis and intelligent perception techniques have been *** paper comprehensively surveys the recent advances of the Industrial Internet,including reference architectures,key technologies,relative applications and future *** architectures which have been proposed for different application scenarios and their corresponding characteristics are *** technologies,such as cloud computing,mobile edge computing,fog computing,which are classified according to different layers in the architecture,are presented to support a variety of applications in the Industrial ***,future challenges and research trends are discussed as well to promote further research of the Industrial Internet.

关键词： Industrial Internet Reference architectures Cloud computing Mobile edge computing Fog computing

A Fast Charging–Cooling Coupled Scheduling Method for a Liquid Cooling-Based Thermal Management System for Lithium-Ion Batteries

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Engineering 2021年第8期7卷 1165-1176页

作者： siqi chen Nengsheng Bao Akhil Garg Xiongbin Peng Liang Gao State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Intelligent Manufacturing Key Laboratory of Ministry of Education Shantou UniversityShantou 515063China

Efficient fast-charging technology is necessary for the extension of the driving range of electric ***,lithium-ion cells generate immense heat at high-current charging *** order to address this problem,an efficient fast charging–cooling scheduling method is urgently *** this study,a liquid cooling-based thermal management system equipped with mini-channels was designed for the fastcharging process of a lithium-ion battery module.A neural network-based regression model was proposed based on 81 sets of experimental data,which consisted of three sub-models and considered three outputs:maximum temperature,temperature standard deviation,and energy *** sub-model had a desirable testing accuracy(99.353%,97.332%,and 98.381%)after *** regression model was employed to predict all three outputs among a full dataset,which combined different charging current rates(0.5C,1C,1.5C,2C,and 2.5C(1C=5 A))at three different charging stages,and a range of coolant rates(0.0006,0.0012,and 0.0018 kg·s^(-1)).An optimal charging–cooling schedule was selected from the predicted dataset and was validated by the *** results indicated that the battery module’s state of charge value increased by 0.5 after 15 min,with an energy consumption lower than 0.02 *** maximum temperature and temperature standard deviation could be controlled within 33.35 and 0.8C,*** approach described herein can be used by the electric vehicles industry in real fast-charging ***,optimal fast charging-cooling schedule can be predicted based on the experimental data obtained,that in turn,can significantly improve the efficiency of the charging process design as well as control energy consumption during cooling.

关键词： Lithium-ion battery module Fast-charging Neural network regression Scheduling State of charge Energy consumption

Paper-based fluorescent devices for multifunctional assays:Biomarkers detection,inhibitors screening and chiral recognition

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Chinese Chemical Letters 2022年第9期33卷 4405-4410页

作者： Wang Li Xiaoyue Zhang siqi chen Yibing Ji Ruijun Li Department of Analytical Chemistry China Pharmaceutical UniversityNanjing 210009China Key Laboratory of Drug Quality Control and Pharmacovigilance Ministry of EducationNanjing 210009China

The development of a single analytical platform with different functions is highly desirable but remains a challenge at ***,a paper-based device based on fluorescent carbon dots(CDs)functionalized paper/MnO_(2)nanosheets(MnO_(2)NS)hybrid devices(PCD/NS)was proposed for single-device multi-function ***_(2)NS functioned as a fluorescence quencher of CDs and recognizer of H_(2)O_(2)released from the oxidase catalyzed *** recovery would occur after the decomposition of MnO_(2)NS induced by H_(2)O_(2),by which a simple and effective strategy could be developed for fluorescence monitoring multiplex biological ***(XA)sensing,xanthine oxidase(XOD)inhibitors screening analysis and chiral recognition of glucose enantiomers were performed on PCD/NS to investigate the multifunctional application of the paper-based *** means of PCD/NS,XA could be determined in the range of 0.1–40μmol/L with a low detection of limit of 0.06μmol/*** IC_(50)value of allopurinol,the model inhibitor of XOD,was sensitively detected to be 7.4μmol/*** enantiomers were also recognized in terms of the specific fluorescence response to *** work firstly presented a paper-based device capable of biomarkers detection,inhibitors screening and chiral recognition,which enlightened a promising strategy for the construction of multifunctional devices and hold the great potential application in clinical diagnosis and drug discovery.

关键词： Paper-based devices Multifunctional Xanthine Inhibitor screening Chiral recognition

Thermal characteristic evolution of lithium-ion batteries during the whole lifecycle

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Journal of Energy Chemistry 2024年第5期92卷 534-547页

作者： Guangxu Zhang Xuezhe Wei Donghai chen Xueyuan Wang siqi chen Jiangong Zhu Haifeng Dai School of Materials Science and Engineering Tongji UniversityShanghai 201804China Clean Energy Automotive Engineering Center Tongji UniversityShanghai 201804China School of Automotive Studies Tongji UniversityShanghai 201804China

This work extensively investigates the thermal characteristic evolution of lithium-ion batteries under different degradation paths,and the evolution mechanism through multi-angle characterization is *** different degradation paths,the evolution trend of temperature rise rate remains unchanged with respect to depth of discharge during the adiabatic discharge process,albeit to varying degrees of *** temperature rise rate changes significantly with aging during the adiabatic discharge process under low-temperature cycling and high-rate cycling *** total heat generation rate,irreversible heat generation rate,and reversible heat generation rate exhibit similar evolution behavior with aging under different degradation *** interval range of endothermic process of reversible electrochemical reactions increases and the contribution of irreversible heat to the total heat increases with *** further standardize the assessment of different degradation paths on the thermal characteristics,this work introduces the innovative concept of“Ampere-hour temperature rise”.In low-temperature cycling and high-rate cycling paths,the ampere-hour temperature rise increases significantly with aging,particularly accentuated with higher discharge ***,in high-temperature cycling and high-temperature storage paths,the ampere-hour temperature rise remains relatively stable during the initial stages of aging,yet undergoes a notable increase in the later stages of *** multi-angle characterization reveals distinct thermal evolution behavior under different degradation paths primarily attributed to different behavior changes of severe side reactions,such as lithium *** findings provide crucial insights for the safe utilization and management of lithium–ion batteries throughout the whole lifecycle.

关键词： Lithium-ion batteries Adiabatic discharge Thermal characteristics Ampere-hour temperaturerise Degradation

Sensitivity of Typhoon Lingling(2019)simulations to horizontal mixing length and planetary boundary layer parameterizations

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Frontiers of Earth Science 2022年第2期16卷 304-322页

作者： siqi chen Feng XU Yu ZHANG Guiling YE Jianjun XU Chunlei LIU College of Ocean and Meteorology Guangdong Ocean UniversityZhanjiang 524088China South China Sea Institute of Marine Meteorology Zhanjiang 524088China Shenzhen Institute of Guangdong Ocean University Shenzhen 518120China

Forecasting the intensity of typhoons is a difficult problem in numerical weather *** is subject to many factors,among which the selection of physical parameterization schemes for the model is a hot topic of *** this study,the effects of horizontal mixing length(represented by h_diff)and planetary boundary layer(PBL)schemes were *** idealized and four operational sensitivity experiments were designed based on simulation of the typhoon Lingling,which occurred over the western Pacific in 2019,using the Hurricane Weather Research and Forecasting *** results of the idealized experiments showed that,as h_diff was increased,the slope of the typhoon eye area also increased,and its intensity became *** the other hand,the results of the sensitivity experiments indicated that the intensity of the simulated typhoon was sensitive to the choice of PBL scheme,with the forecast bias of the QNSE(Quasi-Normal Scale Elimination)scheme being smaller than that of the GFDL(Geophysical Fluid Dynamics Laboratory)*** momentum budget analyses indicated that,when increasing the h_diff,the convergence of angular momentum was larger in the boundary layer,which led to a faster spin-up of the vortex,further increasing the intensity of the *** the calculated horizontal and vertical vortex spread it was found that,when the h_diff was increased,the corresponding horizontal and vertical diffusion eddies also showed an increasing trend,which was also the reason for the strengthening of the ***,the forecast bias decreased significantly with increasing horizontal mixing length when using the same PBL scheme.

关键词： Hurricane Weather Research and Forecasting model planetary boundary layer western Pacific typhoon horizontal diffusion

Large-scale characteristics of landfalling tropical cyclones with abrupt intensity change

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Frontiers of Earth Science 2019年第4期13卷 808-816页

作者： Qianqian JIU Feng XU Jianjun XU Mei LIANG Shifei TU siqi chen South China Sea Institute of Marine Meteorology Guangdong Ocean UniversityZhanjiang 524088China College of Ocean and Meteorology Guangdong Ocean UniversityZhanjiang 524088China Southern Marine Science and Engineering Guangdong Laboratory Zhanjiang 524088China

Data from the China Meteorological Administration and ERA-Interim are used to examine the environmental characteristics of landfalling tropical cyclones(TCs)with abrupt intensity *** results show that,of all 657 landfalling TCs during 1979-2017,71%,70%and 65%of all landfalling TDs,TSs and TYs,respectively,*** all the 16595 samples,4.0%and 0.2%of typhoons and tropical storms,respectively,experience over-water rapid intensification(RI)process during their life ***,4.5%and 0.6%of typhoons and tropial storms,respectively,undergo overwater rapid decay(RD).These two kinds of cases,i.e.,RI and RD,are used to analyze their associated large-scale *** show that the RI cases are generally on the south side of the strong western Pacific subtropical high(WPSH);warm sea surface temperatures(SSTs)and sufficient water vapor fluxes existing in RI samples is a dominant feature that is conducive to the development of ***,the moderate low-level relative vorticity is favorable for TC *** the contrary,the RD TCs are located on the west side of the WPSH;significant decreasing SSTs and low-level water vapor transport may synergistically contribute to ***,low-level relative vorticity seems to be unfavorable for the development of TCs.

关键词： landfalling tropical cyclone abrupt intensity change environmental factors dynamic composite analysis

Research on the impact of high-temperature aging on the thermal safety of lithium-ion batteries

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Journal of Energy Chemistry 2023年第12期87卷 378-389,I0010页

作者： Guangxu Zhang Xuezhe Wei siqi chen Gang Wei Jiangong Zhu Xueyuan Wang Guangshuai Han Haifeng Dai Clean Energy Automotive Engineering Center Tongji UniversityShanghai 201804China School of Automotive Studies Tongji UniversityShanghai 201804China Institute for Advanced Study Tongji UniversityShanghai 200092China Shanghai AI NEV Innovative Platform Co. Ltd.Shanghai 201804China

Understanding the thermal safety evolution of lithium-ion batteries during high-temperature usage conditions bears significant implications for enhancing the safety management of aging *** work investigates the thermal safety evolution mechanism of lithium-ion batteries during high-temperature *** arise in the thermal safety evolution and degradation mechanisms for lithium-ion batteries undergoing cyclic aging and calendar *** multi-angle characterization analysis,the intricate mechanism governing the thermal safety evolution of lithium-ion batteries during high-temperature aging is ***,lithium plating serves as the pivotal factor contributing to the reduction in the self-heating initial ***,the crystal structure of the cathode induced by the dissolution of transition metals and the reductive gas generated during aging attacking the crystal structure of the cathode lead to a decrease in thermal runaway triggering ***,the loss of active materials and active lithium during aging contributes to a decline in both the maximum temperature and the maximum temperature rise rate,ultimately indicating a decrease in the thermal hazards of aging batteries.

关键词： Lithium-ion batteries High-temperature aging Thermal safety Degradation Lithium plating

Optimising the electroluminescence performance of ZnS:Cu/epoxy composites via exploring the relationship between electroluminescence intensity and filler intrinsic attributes

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High Voltage 2022年第6期7卷 1099-1110页

作者： Wen Qi Miao Liu siqi chen Kun He Luxing Zhao Boyang Shen Xingming Bian State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijingChina China Electric Power Research Institute BeijingChina Electrical Engineering Division University of CambridgeCambridgeUK

Electroluminescent composites have considerable potential for applications in photoelectric display,electric field measurement and other fields due to their advantages of simple preparation and uniform ***,high voltage required by the operation of electroluminescent composites hinders their applications in the electric domain,and research on the relationship between electroluminescence principle of composites and filler intrinsic attributes is *** this paper,the effects of electric field strength,filler mass fraction and voltage frequency on the electroluminescence intensity of ZnS:Cu/epoxy composites are studied,which are majorly used as the luminescent layer of electroluminescent *** enhance the electroluminescence intensity of composites,high-temperature sintered BaTiO_(3)and zinc oxide whiskers(ZnOw)particles are introduced in the base *** finite element method is applied to verify that the matrix of high dielectric constant is in favour of improving the electroluminescence intensity of *** band structure of the ZnS:Cu particle is calculated based on the density functional theory+U method to analyse the intrinsic relationship between electroluminescence and particle electronic *** paper provides a basis for the research of high electroluminescence intensity devices and will be conducive to better understanding on the relationship between electroluminescence principle and filler intrinsic attributes.

关键词： composites ZnS:Cu filler

A Comprehensive Approach for the Clustering of Similar-Performance Cells for the Design of a Lithium-Ion Battery Module for Electric Vehicles

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Engineering 2019年第4期5卷 795-802页

作者： Wei Li siqi chen Xiongbin Peng Mi Xiao Liang Gao Akhil Garg Nengsheng Bao State Key Lab of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China Key Lab of Mechatronic Systems Intelligent Integration Technology Ministry of EducationShantou UniversityShantou 515063China

An energy-storage system comprised of lithium-ion battery modules is considered to be a core component of new energy vehicles,as it provides the main power source for the transmission ***,manufacturing defects in battery modules lead to variations in performance among the cells used in series or parallel *** variation results in incomplete charge and discharge of batteries and non-uniform temperature distribution,which further lead to reduction of cycle life and battery capacity over *** solve this problem,this work uses experimental and numerical methods to conduct a comprehensive investigation on the clustering of battery cells with similar performance in order to produce a battery module with improved electrochemical *** were first performed by dismantling battery modules for the measurement of performance *** kmeans clustering and support vector clustering(SVC)algorithms were then employed to produce battery modules composed of 12 cells *** verification of the results obtained from the clustering analysis was performed by measuring the temperature rise in the cells over a certain period,while air cooling was *** was found that the SVC-clustered battery module in Category 3 exhibited the best performance,with a maximum observed temperature of 32℃.By contrast,the maximum observed temperatures of the other battery modules were higher,at 40℃for Category 1(manufacturer),36℃for Category 2(manufacturer),and 35℃for Category 4(k-means-clustered battery module).

关键词： Clustering algorithm Battery module Equalization Electric vehicle