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A Critical Review of Thermal Runaway Prediction and Early-Warning Methods for Lithium-Ion Batteries

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Energy Material Advances 2023年第1期4卷 12-24页

作者： Xi Zhang Shun Chen Jingzhe Zhu yizhao gao School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 201100China

Lithium-ion batteries are widely used in electric vehicles because of their high energy density and long cycle ***,the spontaneous combustion accident of electric vehicles caused by thermal runaway of lithium-ion batteries seriously threatens passengers'personal and property *** paper expounds on the internal mechanism of lithium-ion battery thermal runaway through many previous studies and summarizes the proposed lithium-ion battery thermal runaway prediction and early warning *** methods can be classified into battery electrochemistry-based,battery big data analysis,and artificial intelligence *** this paper,various lithium-ion thermal runaway prediction and early warning methods are analyzed in detail,including the advantages and disadvantages of each method,and the challenges and future development directions of the intelligent lithium-ion battery thermal runaway prediction and early warning methods are discussed.

关键词： battery lithium prediction

Experimental study on compaction-induced anisotropic mechanical property of rockfill material

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Frontiers of Structural and Civil Engineering 2021年第1期15卷 109-123页

作者： Xiangtao ZHANG yizhao gao Yuan WANG Yu-zhen YU Xun SUN State Key Laboratory of Hydroscience and Engineering Department of Hydraulic EngineeringTsinghua UniversityBeijing 100084China

The anisotropy of rockfill materials has a significant influence on the performance of engineering ***,relevant research data are very limited,because of the difficulty with preparing specimens with different inclination angles using traditional ***,the anisotropy test of rockfill materials is complex and complicated,especially for triaxial tests,in which the major principal stress plane intersects with the compaction plane at different *** this study,the geometric characteristics of a typical particle fraction consisting of a specific rockfill material were statistically investigated,and the distribution characteristics of particle orientation in specimens prepared via different compaction methods were *** high-density rockfill materials,a set of specimen preparation devices for inclined compaction planes was developed,and a series of conventional triaxial compression tests with different principal stress direction angles were *** results reveal that the principal stress direction angle has a significant effect on the modulus,shear strength,and dilatancy of the compacted rockfill *** of the relationship between the principal stress direction angles,change in the stress state,and change in the corresponding dominant shear plane shows that the angle between the compacted surface and dominant shear plane is closely related to interlocking resistance associated with the particle *** addition,different principal stress direction angles can change the extent of the particle interlocking effect,causing the specimen to exhibit different degrees of anisotropy.

关键词： rockfill inclination of specimen preparation anisotropy mechanical property mechanism

Online battery model parameters identification approach based on bias-compensated forgetting factor recursive least squares

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Green Energy and Intelligent Transportation 2024年第4期3卷 12-22页

作者： Dong Zhen Jiahao Liu Shuqin Ma Jingyu Zhu Jinzhen Kong yizhao gao Guojin Feng Fengshou Gu School of Mechanical Engineering Hebei University of TechnologyTianjin300401 China Advanced Equipment Research Institute Co. Ltd.of HEBUTTianjin300401 China College of Information Science and Engineering Hohai UniversityNanjing210098 China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai200240 China School of Computing and Engineering University of HuddersfieldHuddersfield HD13DHUK

Accuracy of a lithium-ion battery model is pivotal in faithfully representing actual state of battery,thereby influencing safety of entire electric *** estimation of battery model parameters using key measured signals is ***,measured signals inevitably carry random noise due to complex real-world operating environments and sensor errors,potentially diminishing model estimation *** the challenge of accuracy reduction caused by noise,this paper introduces a Bias-Compensated Forgetting Factor Recursive Least Squares(BCFFRLS)***,a variational error model is crafted to estimate the average weighted variance of random ***,an augmentation matrix is devised to calculate the bias term using augmented and extended parameter vectors,compensating for bias in the parameter *** assess the proposed method's effectiveness in improving parameter identification accuracy,lithium-ion battery experiments were conducted in three test conditions—Urban Dynamometer Driving Schedule(UDDS),Dynamic Stress Test(DST),and Hybrid Pulse Power Characterization(HPPC).The proposed method,alongside two contrasting methods—the offline identification method and Forgetting Factor Recursive Least Squares(FFRLS)—was employed for battery model parameter *** analysis reveals substantial improvements,with the mean absolute error reduced by 25%,28%,and 15%,and the root mean square error reduced by 25.1%,42.7%,and 15.9%in UDDS,HPPC,and DST operating conditions,respectively,when compared to the FFRLS method.

关键词： Lithium-ion battery Battery model Recursive least squares Parameter identification

基于广义塑性模型的高心墙堆石坝反演计算分析

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水力发电学报 2020年第9期39卷 88-98页

作者：张向韬高溢钊王翔南于玉贞清华大学水沙科学与水利水电工程国家重点实验室北京100084

高堆石坝工程在填筑、蓄水和运行过程中,堆石料常经历复杂多变的应力路径,它所表现出的各向异性和颗粒破碎对其力学特性有明显的影响。采用现有的方法计算高堆石坝变形误差大,其主要原因是目前本构模型在反映堆石料的本质特性方面有待... 详细信息

高堆石坝工程在填筑、蓄水和运行过程中,堆石料常经历复杂多变的应力路径,它所表现出的各向异性和颗粒破碎对其力学特性有明显的影响。采用现有的方法计算高堆石坝变形误差大,其主要原因是目前本构模型在反映堆石料的本质特性方面有待完善。本文构造了各向异性状态参量,定义了参考各向异性状态参数替代基于固定临界状态线的状态参数,可将各向异性、颗粒破碎、复杂应力路径的影响综合考虑到与参考状态线的相对空间位置中。基于参考各向异性状态参数,发展了考虑各向异性和颗粒破碎的堆石料弹塑性本构模型。最后,采用所发展的堆石料广义塑性模型MPZR对已建的糯扎渡高心墙堆石坝进行了应力变形有限元计算分析,并与堆石体内测点的监测值进行对比,验证了模型的可靠性和实用性。

关键词：堆石料各向异性颗粒破碎本构模型高堆石坝

Bulging Performance and Quality Control of Aluminum Alloy Tailor-welded Overlapping Sheets Based on Interface Friction

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 258-264页

作者： gao Tiejun gao Bowen LI Weijie ZHANG Jiabin College of Aerospace Engineering Shenyang Aerospace UniversityShenyang 110136China Shenyang Aerospace Xinguang Group Co.L td. Shenyang 110043China

In order to solve the problem of poor formability caused by different materials and properties in the process of tailor-welded sheets forming,a forming method was proposed to change the stress state of tailor-welded sheets by covering the tailor-welded sheets with better plastic properties overlapping *** the same time,the interface friction effect between the overlapping and tailor-welded sheets was utilized to control the stress magnitude and further improve the formability and quality of the tailor-welded *** this work,the bulging process of the tailor-welded overlapping sheets was taken as the research *** alloy tailor-welded overlapping sheets bulging specimens were studied by a combination of finite element analysis and experimental *** results show that the appropriate use of interface friction between tailor-welded and overlapping sheets can improve the formability of tailor-welded sheets and control the flow of weld seam to improve the forming *** increasing the interface friction coefficient on the side of tailor-welded sheets with higher strength and decreasing that on the side of tailor-welded sheets with lower strength,the deformation of the tailor-welded sheets are more uniform,the offset of the weld seam is minimal,the limit bulging height is maximal,and the forming quality is optimal.

关键词： tailor-welded sheets overlapping sheet bulging interface friction weld seam stress

Local magnetic moment oscillation around an Anderson impurity on graphene

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 192-201页

作者： Shuai Li Zhen Ma Jin-Hua gao School of Science Hebei University of Science and Technology School of Electronics and Information Zhengzhou University of Light Industry School of Physics and Wuhan National High Magnetic Field Center Huazhong University of Science and Technology

We theoretically investigate the spin resolved Friedel oscillation （FO） and quasiparticle interference （QPI） in graphene induced by an Anderson *** the impurity becomes magnetic,the resulted FO becomes spin dependent,which gives rise to a local magnetic moment oscillation with an envelop decaying as r-2in real space in the doping ***,at half filling,the electron density and local magnetic moment will not oscillate but decay as *** spin resolved FO has both sublattice and spin ***,the local magnetic moment decay at half filling only occurs at one sublattice of graphene,which is quite like the phenomenon observed in the STM experiment (***ález-Herrero et al.,Science 352,437 （2016）).We further give an analytic formula about such spin dependent FO based on the stationary phase ***,we study the interference of quasiparticles around the magnetic impurity by calculating the spin dependent Fourier-transformed local density of states （FT-LDOS）.Our work gives a comprehensive understanding about the local magnetic moment oscillation around an Anderson impurity on graphene.

关键词： Friedel oscillation local magnetic moment graphene Anderson impurity

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计及电池老化的电池温度仿真与验证

电源技术 2021年第10期45卷 1287-1291页

作者：王东升张希高一钊郭邦军陈顺上海交通大学机械与动力工程学院上海200240

针对锂离子电池温度估算问题,提出一种基于电化学机理的电池温度估计方法。以容量为3.2 Ah的18650三元锂离子电池为研究对象,在考虑电池老化对电池温度影响的基础上,根据18650电池结构和电池传热规律,计算电池在使用过程中的内部产热速... 详细信息

针对锂离子电池温度估算问题,提出一种基于电化学机理的电池温度估计方法。以容量为3.2 Ah的18650三元锂离子电池为研究对象,在考虑电池老化对电池温度影响的基础上,根据18650电池结构和电池传热规律,计算电池在使用过程中的内部产热速率,并采用有限差分法估算电池表面温度,最后通过MATLAB/SIMULINK搭建锂离子电池电化学-热耦合模型。仿真结果表明仿真温度与实验测得的温度变化趋势基本一致,为动力电池的热管理系统提供了一定的参考依据。

关键词：锂离子电池电化学机理电池温度估计电池老化

Macro-mechanics and Microstructure of Nanomaterial-modified Geopolymer Concrete: A Comprehensive Review

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 204-214页

作者： WANG Tao FAN Xiangqian gao Changsheng QU Chiyu The National Key Laboratory of Water Disaster Prevention Nanjing Hydraulic Research InstituteNanjing 210024China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China School of Water Conservancy and Transportation Zhengzhou UniversityZhengzhou 450001China

We have described in detail the effects of nano-SiO_(2),nano-CaCO_(3),carbon nanotubes,and nano-Al_(2)O_(3) on geopolymer concrete from the perspectives of macro mechanics and *** existing research results show that the mechanism of nano-materials on geopolymer concrete mainly includes the filling effect,nucleation effect,and bridging effect,the appropriate amount of nano-materials can be used as fillers to reduce the porosity of geopolymer concrete,and can also react with Ca(OH)2 to produce C-S-H gel,thereby improving the mechanical properties of geopolymer *** optimum content of nano-SiO_(2) is between 1.0%and 2.0%.The optimum content of nano-CaCO_(3) is between 2.0%and 3.0%.The optimum content of carbon nanotubes is between 0.1%and 0.2%.The optimum content of nano-Al_(2)O_(3) is between 1.0%and 2.0%.The main problems existing in the research and application of nanomaterial-modified geopolymer concrete are summarized,which lays a foundation for the further application of nanomaterial in geopolymer concrete.

关键词： nanomaterials low carbon geopolymer concrete macro-mechanics microstructure

IoT Empowered Early Warning of Transmission Line Galloping Based on Integrated Optical Fiber Sensing and Weather Forecast Time Series Data

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Computers, Materials & Continua 2025年第1期82卷 1171-1192页

作者： Zhe Li Yun Liang Jinyu Wang Yang gao State Grid Henan Electric Power Company Electric Power Scientific Research Institute State Grid Henan Electric Power CompanyZhengzhou450052China

Iced transmission line galloping poses a significant threat to the safety and reliability of power systems,leading directly to line tripping,disconnections,and power *** early warning methods of iced transmission line galloping suffer from issues such as reliance on a single data source,neglect of irregular time series,and lack of attention-based closed-loop feedback,resulting in high rates of missed and false *** address these challenges,we propose an Internet of Things(IoT)empowered early warning method of transmission line galloping that integrates time series data from optical fiber sensing and weather ***,the method applies a primary adaptive weighted fusion to the IoT empowered optical fiber real-time sensing data and weather forecast data,followed by a secondary fusion based on a Back Propagation(BP)neural network,and uses the K-medoids algorithm for clustering the fused ***,an adaptive irregular time series perception adjustment module is introduced into the traditional Gated Recurrent Unit(GRU)network,and closed-loop feedback based on attentionmechanism is employed to update network parameters through gradient feedback of the loss function,enabling closed-loop training and time series data prediction of the GRU network ***,considering various types of prediction data and the duration of icing,an iced transmission line galloping risk coefficient is established,and warnings are categorized based on this ***,using an IoT-driven realistic dataset of iced transmission line galloping,the effectiveness of the proposed method is validated through multi-dimensional simulation scenarios.

关键词： Optical fiber sensing multi-source data fusion early warning of galloping time series data IoT adaptive weighted learning irregular time series perception closed-loop attention mechanism