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Functional Optical Fiber Sensors Detecting Imperceptible Physical/Chemical Changes for Smart Batteries

Nano-Micro Letters 2024年第8期16卷 268-308页

作者： Yiding Li Li wang Youzhi Song wenwei wang Cheng Lin Xiangming He Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084People’s Republic of China National Engineering Research Center of Electric Vehicles Beijing Institute of Technology(BIT)Beijing 100081People’s Republic of China Shenzhen Automotive Research Institute of BIT(Shenzhen Research Institute of National Engineering Research Center of Electric Vehicles) Shenzhen 518118People’s Republic of China

The battery technology progress has been a contradictory process in which performance improvement and hidden risks coexist.Now the battery is still a“black box”,thus requiring a deep understanding of its internal state.The battery should“sense its internal physical/chemical conditions”,which puts strict requirements on embedded sensing parts.This paper summarizes the application of advanced optical fiber sensors in lithium-ion batteries and energy storage technologies that may be mass deployed,focuses on the insights of advanced optical fiber sensors into the processes of one-dimensional nano-micro-level battery material structural phase transition,electrolyte degradation,electrode-electrolyte interface dynamics to three-dimensional macro-safety evolution.The paper contributes to understanding how to use optical fiber sensors to achieve“real”and“embedded”monitoring.Through the inherent advantages of the advanced optical fiber sensor,it helps clarify the battery internal state and reaction mechanism,aiding in the establishment of more detailed models.These advancements can promote the development of smart batteries,with significant importance lying in essentially promoting the improvement of system consistency.Furthermore,with the help of smart batteries in the future,the importance of consistency can be weakened or even eliminated.The application of advanced optical fiber sensors helps comprehensively improve the battery quality,reliability,and life.

关键词： Smart battery Advanced embedded optical fiber sensor Battery internal physical/chemical state Quality-reliability-life characteristic

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Review of Electrical and Electronic Architectures for Autonomous Vehicles:Topologies,Networking and Simulators

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Automotive Innovation 2024年第1期7卷 82-101页

作者： wenwei wang Kaidi Guo Wanke Cao Hailong Zhu Jinrui Nan Lei Yu National Engineering Research Center of Electric Vehicles Beijing Institute of Technology(BIT)Beijing 100081China Shenzhen Automotive Research Institute Beijing Institute of Technology(BIT)Shenzhen 518000China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationBeijing 100876China Purple Mountain Laboratories Nanjing 211111China Beijing Kawen New Energy Vehicle Co. LTDBeijing 102209China

With the rapid development of autonomous vehicles,more and more functions and computing requirements have led to the continuous centralization in the topology of electrical and electronic(E/E)architectures.While certain Tier1 suppliers,such as BOSCH,have previously proposed a serial roadmap for E/E architecture development,implemented since 2015 with significant contributions to the automotive industry,lingering misconceptions and queries persist in actual engineering processes.Notably,there are concerns regarding the perspective of zone-oriented E/E architectures,characterized by zonal concentration,as successors to domain-oriented E/E architectures,known for functional concentration.Addressing these misconceptions and queries,this study introduces a novel parallel roadmap for E/E architecture development,concurrently evaluating domain-oriented and zone-oriented schemes.Furthermore,the study explores hybrid E/E architectures,amalgamating features from both paradigms.To align with the evolution of E/E architectures,networking technologies must adapt correspondingly.The networking mechanisms pivotal in E/E architecture design are comprehensively discussed.Additionally,the study delves into modeling and verification tools pertinent to E/E architecture topologies.In conclusion,the paper outlines existing challenges and unresolved queries in this domain.

关键词： Autonomous vehicles Electrical and electronic architectures Topology Networking Domain-oriented Zone-oriented

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Review of In‑Vehicle Optical Fiber Communication Technology

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Automotive Innovation 2022年第3期5卷 272-284页

作者： wenwei wang Shiyao Yu Wanke Cao Kaidi Guo National Engineering Research Center of Electric Vehicles Beijing Institute of Technology(BIT)BeijingChina Shenzhen Automotive Research Institute Beijing Institute of Technology(BIT)ShenzhenChina

With the continuous development of automotive intelligent networking and autonomous driving technologies,the number of in-vehicle electronic systems and applications is increasing rapidly.This change increases the amount of data to be transmitted in the vehicle and puts forward further requirements of higher speed and safety for in-vehicle communication.Traditional vehicle bus technologies are no longer sufficient to meet today’s high-speed transmission requirements,in which copper cables are used extensively,resulting in serious electromagnetic interference(EMI).Vehicle optical fiber communication technology,besides greatly improving the data transmission rate,has the advantages of anti-EMI,reducing cable space and vehicle mass.This paper first presents the motivation of applying vehicle optical fiber communication technology and reviews the development history of vehicle optical fiber communication technology.Then,the paper researches the devel-opment trend of automotive electrical and electronic architecture(EEA),from distributed EEA to domain centralized EEA and zone-oriented EEA.Based on the discussion of the development trend of automotive EEA,an EEA based on vehicle optical fiber communication technology is proposed.Finally,the key points and future directions of vehicle optical fiber communication technology research are highlighted,including vehicle multi-mode optical fiber technology,vehicle optical fiber network protocol,and topology.

关键词： In-vehicle network Optical fiber communication Multi-mode optical fiber Electrical and electronic architecture

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Heating Lithium-Ion Batteries at Low Temperatures for Onboard Applications:Recent Progress,Challenges and Prospects

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Automotive Innovation 2022年第1期5卷 3-17页

作者： Cheng Lin Weifeng Kong Yu Tian wenwei wang Mingjie Zhao National Engineering Laboratory for Electric Vehicles Beijing Institute of TechnologyBeijing 100081China State Key Laboratory of Automotive Safety and Energy Tsinghua UniversityBeijing 100084China

Lithium-ion batteries(LIBs)are commonly used in electric vehicles(EVs)due to their good performance,long lifecycle,and environmentally friendly merits.Heating LIBs at low temperatures before operation is vitally important to protect the battery from serious capacity degradation and safety hazards.This paper reviews recent progress on heating methods that can be used onboard.The existing methods are divided into two categories,namely external heating methods and internal heating methods,mechanisms,advantages and limitations of each method are systematically reviewed.Then,the rates of temperature rise,energy consumptions,and maximum temperature gradient of different methods are quantitatively summa-rized to compare the heating performances of each method.In addition,features related to the onboard application of each method are qualitatively compared,which is essential for the rapid cold start of EVs in frigid weather.Finally,prospects of external and internal heating methods are given.This paper aims to provide researchers and engineers with guidelines about how to select a method based on their requirements and application environments.

关键词： Electric vehicle Lithium-ion battery Battery heating Battery thermal management

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Research on Features and Applications of Jadeite Jewelryand Product in Tengchong,China

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宝石和宝石学杂志（中英文） 2023年第1期25卷 81-88页

作者： wenwei wang Ren Lu Zuowei Yin Gemmological Institute China University of GeosciencesWuhan 430074China Jewelry College of West Yunnan University of Applied Science Tengchong 679100China

Tengchong,an ancient border town located in southwest China,has more than 500years of history in the trading and processing of jadeite.It is an important distribution center for jadeite and the birthplace of China’s jadeite culture.Tengchong has three key advantages:location,culture and history,and is able to integrate local culture to form the unique style of“Yunnan Jade Carving”.This article combines physical objects with related results of previous studies,based on the different usage and functions of jadeite jewelry and products in Tengchong,in order to analyze and summarize their classification and application.The four aspects of pattern,material,colour and technique are also been analyzed,as well as the linguistic features of jadeite jewelry and products in Tengchong,with the hope of providing ideas and references for the creation of modern jadeite jewelry.

关键词： culture trading southwest

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Mass‑Spring‑Damping Theory Based Equivalent Mechanical Model for Cylindrical Lithium‑ion Batteries under Mechanical Abuse

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Chinese Journal of Mechanical Engineering 2020年第2期33卷 161-174页

作者： wenwei wang Yiding Li Cheng Lin Sheng Yang National Engineering Laboratory for Electric Vehicles Beijing Institute of TechnologyBeijing 100081China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing Institute of TechnologyBeijing 100081China

An equivalent mechanical model with the equivalent physical meaning of mass-spring-damping is proposed for cylindrical lithium-ion batteries through experiments and theory.The equivalent mechanical model of a cylindrical lithium-ion battery consists of a spring-damping parallel unit.Therefore,a spring-damping parallel unit connecting a damping unit in series is selected to construct the constitutive characteristics of the battery under mechanical abuse.Comparison results show that the equivalent mechanical model can more effectively describe the mechanical properties of the batteries than most cubic fitting models,of which the average relative error of the equivalent mechanical model under different states-of-charge is less than 6.75%.Combined with the proposed equivalent mechanical model,the failure process of the batteries was simulated and analyzed using LS-Dyna and HyperWorks.Under rigid rod tests,failure occurred at the core and bottom of the batteries;under hemispherical punch tests,failure occurred at the core and top,consistent with the experimental results.The average prediction error for the failure displacement under different abuse conditions is less than 4%in the simulations.The equivalent mechanical model requires only a few parameters and can be recognized easily.In the future,the model can be used in safety warning devices based on mechanical penetration.

关键词： Cylindrical lithium-ion battery Mass-spring-damping theory Equivalent mechanical model Mechanical abuse condition Failure analysis

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基于Arduino的SMA丝材智能修复损伤钢筋混凝土梁试验研究

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桥梁建设 2024年第1期54卷 61-67页

作者：何初生王文炜姜进科张吴桐东南大学交通学院江苏南京210096

为修复钢筋混凝土梁在使用阶段中由于材料老化、裂缝开展等原因造成的损伤,提出一种基于Arduino智能平台和形状记忆合金(Shape Memory Alloy,SMA,具有形状记忆效应和超弹性特性)的智能修复控制系统,根据挠度及裂缝控制原理,设计智能修... 详细信息

为修复钢筋混凝土梁在使用阶段中由于材料老化、裂缝开展等原因造成的损伤,提出一种基于Arduino智能平台和形状记忆合金(Shape Memory Alloy,SMA,具有形状记忆效应和超弹性特性)的智能修复控制系统,根据挠度及裂缝控制原理,设计智能修复控制装置。该装置由输入模块、处理模块和输出模块组成,当检测到钢筋应变超过限值时,输出模块升高SMA丝材温度对梁体进行修复。为验证该智能修复装置的修复性能,设计对比梁A(无修复装置)与试验梁B(加装智能修复控制装置),在加载过程中对试验梁B进行3次修复,对2根梁的跨中挠度、钢筋应变及裂缝宽度等进行对比分析。结果表明:破坏时试验梁B的跨中挠度、裂缝宽度均小于对比梁A,并且在3次修复中试验梁B的跨中挠度、裂缝宽度和钢筋应变最大回复率分别为31.0%、47.0%和71.5%。说明该智能修复控制装置可以监测试验梁受损情况并激发SMA材料对试验梁实施修复,实现钢筋混凝土梁的智能修复。

关键词：钢筋混凝土梁形状记忆合金智能修复控制系统回复性跨中挠度钢筋应变模型试验

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Metamodel-Based Multi-Objective Reliable Optimization for Front Structure of Electric Vehicle

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Automotive Innovation 2018年第2期1卷 131-139页

作者： Fengling Gao Shan Ren Cheng Lin Yingchun Bai wenwei wang School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China Collaborative Innovation Center of Electric Vehicles Beijing Institute of TechnologyBeijing 100081China China Automotive Technology and Research Center Tianjin 300300China

In this paper,a multi-objective reliable optimization(MORO)procedure for the front body of an electric vehicle is proposed and compared with determinate multi-objective optimization(DMOO).The energy absorption and peak crash force of the simplified vehicle model under the full-lap frontal impact condition are used as the design objectives,with the weighted sum of the basic frequency,the first-order torsional and bending frequencies of the full-size vehicle model,and the weight of the front body taken as the constraints.The thicknesses of nine components on the front body are defined as design variables,and their geometric tolerances determine the uncertainty factor.The most accurate metamodel using the polynomial response surface,kriging,and a radial basis function is selected to model four design criteria during optimization,allowing the efficiency improvement to be computed.Monte Carlo simulations are adopted to handle the probability constraints,and multi-objective particle swarm optimization is employed as the solver.The MORO results indicate reliability levels of R=100%,demonstrating the significant enhancement in reliability of the front body over that given by DMOO,and reliable design schemes and proposals are provided for further study.

关键词： Multi-objective reliable optimization Electric vehicle body Metamodel technique Monte Carlo

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当代腾冲翡翠玉雕工艺的传承与发展路向研究

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宝石和宝石学杂志（中英文） 2024年第1期26卷 76-87页

作者：王文薇卢靭尹作为中国地质大学(武汉)珠宝学院湖北武汉430074 湖北省人文社科研究基地“珠宝首饰传承与创新发展研究中心” 湖北武汉430074 滇西应用技术大学珠宝学院云南腾冲679100

腾冲翡翠玉雕作为国家级非物质文化遗产,不仅是腾冲文化基因的代表,也是中华优秀传统玉文化的重要组成部分。本文通过对腾冲翡翠玉雕加工基地和玉雕非遗传承人进行实地考察,总结归纳了腾冲翡翠玉雕目前存在的困境;同时,以传承发展为主线... 详细信息

腾冲翡翠玉雕作为国家级非物质文化遗产,不仅是腾冲文化基因的代表,也是中华优秀传统玉文化的重要组成部分。本文通过对腾冲翡翠玉雕加工基地和玉雕非遗传承人进行实地考察,总结归纳了腾冲翡翠玉雕目前存在的困境;同时,以传承发展为主线,重点从传统工艺理念的传承与创新,工艺传承队伍的科学构建,地域非遗文化品牌的塑造,多元媒介的动态展示与传播,国际化的交流与互鉴等五个维度对腾冲翡翠玉雕的传承与发展路向展开探讨,以期在当今非遗语境中对区域性玉雕工艺的可持续发展提供有效的参考与范式。

关键词：腾冲翡翠玉雕工艺传承发展路向非物质文化遗产

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气候冲击下金融风险的研究进展和展望——基于物理风险和转型风险视角

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金融经济 2024年第4期 34-51页

作者：王文蔚中国人民银行金融研究所

本文从物理风险和转型风险两个视角综述了近年来关于气候风险对经济和金融体系影响的研究进展。在宏观经济层面,气候风险对经济增长和波动的影响显著。物理风险通过减少资本积累、降低劳动生产率,对经济增长产生负面影响;转型风险在短... 详细信息

本文从物理风险和转型风险两个视角综述了近年来关于气候风险对经济和金融体系影响的研究进展。在宏观经济层面,气候风险对经济增长和波动的影响显著。物理风险通过减少资本积累、降低劳动生产率,对经济增长产生负面影响;转型风险在短期内抑制经济产出和就业,但长期内通过推动低碳技术进步,有助于提升经济效率和产出。在微观经济层面,气候风险对企业生产经营和财务决策的影响广泛。气候物理风险可能导致企业市场估值下降、成本增加和盈利能力减弱;转型风险则通过影响企业融资成本和资产估值,形成“碳泡沫”并引发金融风险。金融机构方面,银行、保险和资管行业需在现有风险管理体系中纳入气候风险因素,以应对潜在的金融不稳定性。研究表明,气候风险敞口对金融机构资产负债表和经营稳定性构成重要威胁。在梳理现有文献的基础上,本文提出了多角度的气候风险测度方法,并探讨了气候风险对宏观经济波动、微观企业生产经营及金融机构稳定性的影响,最后对未来研究方向进行了展望。本文为进一步研究气候风险及其经济金融影响提供了有益的理论基础和实践参考。

关键词：气候物理风险气候转型风险经济增长金融稳定低碳转型环境规制灾害经济学气候政策

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