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| 1 | Internal short circuit detection method for battery pack based on circuit topology显示文摘Internal short circuit(ISCr) is one of the major obstacles to the improvement of the battery safety. The ISCr may lead to the battery thermal runaway and is hard to be detected in the early stage. In this work, a new ISCr detection method based on the symmetrical loop circuit topology(SLCT) is introduced. The SLCT ensures that every battery has the same priority in the circuit and every battery will contribute the same amount of short-circuit current to the ISCr once the ISCr happens. The ISCr battery could be identified by the combination of the ratio of the short-circuit currents and the sign of the short-circuit currents. The recursive least square method is adopted for the real-time application and the optimized ammeters allocation is derived from the mathematic deduction. The battery pack based on the individual DP(dual polarization) battery model is established to verify the ISCr detection method. The 1–1000 Ω s ISCr(the early stage ISCr) can be effectively detected within 1–125 s. The SLCT provides the possibility of new battery pack designs and new battery management methods. The proposed ISCr detection method shows excellent effectiveness and efficiency on the identification of the ISCr battery in the early stage. | ZHANG MingXuan DU JiuYu LIU LiShuo SIEGEL Jason LU LanGuang HE XiangMing OUYANG MingGao | 2018 | Science China(Technological Sciences)2018，61，10： | 6 |
| 2 | A review on the key issues for lithium-ion battery management in electric vehicles显示文摘 | Languang Lu Xuebing Han Jianqiu Li Jianfeng Hua Minggao Ouyang | 2013 | Journal of Power Sources2013，，： | 5 |
| 3 | Internal short circuit evaluation and corresponding failure mode analysis for lithium-ion batteries显示文摘Internal short circuit(ISC)is the major failure problem for the safe application of lithium-ion batteries,especially for the batteries with high energy density.However,how to quantify the hazard aroused by the ISC,and what kinds of ISC will lead to thermal runaway are still unclear.This paper investigates the thermal-electrical coupled behaviors of ISC,using batteries with Li(Ni_(1/3)CO_(1/3)Mn_(1/3))O_(2) cathode and composite separator.The electrochemical impedance spectroscopy of customized battery that has no LiPF6 salt is utilized to standardize the resistance of ISC.Furthermore,this paper compares the thermal-electrical coupled behaviors of the above four types of ISC at different states-of-charge.There is an area expansion phenomenon for the aluminum-anode type of ISC.The expansion effect of the failure area directly links to the melting and collapse of separator,and plays an important role in further evolution of thermal runaway.This work provides guidance to the development of the ISC models,detection algorithms,and correlated countermeasures. | Lishuo Liu Xuning Feng Christiane Rahe Weihan Li Languang Lu Xiangming He Dirk Uwe Sauer Minggao Ouyang | 2021 | Journal of Energy Chemistry2021，30，10： | 5 |
| 4 | A Comparative Study of Charging Voltage Curve Analysis and State of Health Estimation of Lithium-ion Batteries in Electric Vehicle显示文摘Lithium-ion(Li-ion)cells degrade after repeated cycling and the cell capacity fades while its resistance increases.Degra-dation of Li-ion cells is caused by a variety of physical and chemical mechanisms and it is strongly influenced by factors including the electrode materials used,the working conditions and the battery temperature.At present,charging voltage curve analysis methods are widely used in studies of battery characteristics and the constant current charging voltage curves can be used to analyze battery aging mechanisms and estimate a battery’s state of health(SOH)via methods such as incremental capacity(IC)analysis.In this paper,a method to fit and analyze the charging voltage curve based on a neural network is proposed and is compared to the existing point counting method and the polynomial curve fitting method.The neuron parameters of the trained neural network model are used to analyze the battery capacity relative to the phase change reactions that occur inside the batteries.This method is suitable for different types of batteries and could be used in battery management systems for online battery modeling,analysis and diagnosis. | Xuebing Han Xuning Feng Minggao Ouyang Languang Lu Jianqiu Li Yuejiu Zheng Zhe Li | 2019 | Automotive Innovation2019，2，4： | 3 |
| 5 | A review on the key issues for lithium-ion battery management in electric vehicles显示文摘 | Lu Languang Han Xuebing Li Jianqiu | 2013 | Journal of Power Sources2013，226，1： | 1 |
| 6 | Thermal Runaway of Lithium-Ion Batteries Employing Flame-Retardant Fluorinated Electrolytes显示文摘Fluorinated electrolytes possess good antioxidant capacity that provides high compatibility to high-voltage cathode and flame retardance;thus,they are considered as a promising solution for advanced lithium-ion batteries carrying both high-energy density and high safety.Moreover,the fluorinated electrolytes are widely used to form stable electrolyte interphase,due to their chemical reactivity with lithiated graphite or lithium.However,the influence of this reactivity on the thermal safety of batteries is seldom discussed.Herein,we demonstrate that the flame-retardant fluorinated electrolytes help to reduce the flammability,while the lithium-ion batteries with flame-retardant fluorinated electrolytes still undergo thermal runaway and disclose their different thermal runaway pathway from that of battery with conventional electrolyte.The reduction in fluorinated components(e.g.,LiPF 6 and fluoroethylene carbonate(FEC))by fully lithiated graphite accounts for a significant heat release during battery thermal runaway.The 13%of total heat is sufficient to trigger the chain reactions during battery thermal runaway.This study deepens the understanding of the thermal runaway mechanism of lithium-ion batteries employing flame-retardant fluorinated electrolytes,providing guidance on the concept of electrolyte design for safer lithium-ion batteries. | Junxian Hou Li Wang Xuning Feng Junpei Terada Languang Lu Shigeaki Yamazaki Anyu Su Yoshiko Kuwajima Yongjiang Chen Tomoya Hidaka Xiangming He Hewu Wang Minggao Ouyang | 2023 | Energy & Environmental Materials2023，6，1： | 1 |
| 7 | A review on the key issues for lithium-ion battery management in electric vehicles显示文摘 | Languang Lu Xuebing Han Jianqiu Li | 2013 | Journal of Power Sources2013，226，： | 1 |
| 8 | An ultra-fast charging strategy for lithium-ion battery at low temperature without lithium plating显示文摘Conventional charging methods for lithium-ion battery(LIB)are challenged with vital problems at low temperatures:risk of lithium(Li)plating and low charging speed.This study proposes a fast-charging strategy without Li plating to achieve high-rate charging at low temperatures with bidirectional chargers.The strategy combines the pulsed-heating method and the optimal charging method via precise control of the battery states.A thermo-electric coupled model is developed based on the pseudo-twodimensional(P2D)electrochemical model to derive charging performances.Two current maps of pulsed heating and charging are generated to realize real-time control.Therefore,our proposed strategy achieves a 3 C equivalent rate at 0℃ and 1.5 C at-10℃ without Li plating,which is 10–30 times faster than the traditional methods.The entropy method is employed to balance the charging speed and the energy efficiency,and the charging performance is further enhanced.For practical application,the power limitation of the charger is considered,and a 2.4 C equivalent rate is achieved at 0℃ with a 250 kW maximum power output.This novel strategy significantly expands LIB usage boundary,and increases charging speed and battery safety. | Yudi Qin Pengyu Zuo Xiaoru Chen Wenjing Yuan Rong Huang Xiaokan Yang Jiuyu Du Languang Lu Xuebing Han Minggao Ouyang | 2022 | Journal of Energy Chemistry2022，31，9： | 1 |
| 9 | A study on the control of diesel engine common-rail pressure显示文摘 | Lu Languang Chen Qinxue Cui Kerun | 2003 | Journal of Wuhan University of Technology: Transportation Science & Engineering2003，27，1： | 1 |
| 10 | A review on the key issues for lithium-ion battery management in electric vehicles显示文摘 | Lu Languang Han Xuebing Li Jianqiu | 2013 | Journal of Power Sources2013，226，： | 1 |
| 11 | , A comparative study of commercial lithium ion battery cycle life in electric vehicle: Capacity loss estimation 显示文摘 | HAN Xuebing OUYANG Minggao LU Languang | 2014 | J Power Sources2014，268，4： | 1 |
| 12 | A comparative study of commercial lithium ion battery cycle life in electrical vehicle: Aging mechanism identification 显示文摘 | HAN Xuebing OUYANG Minggao LU Languang | 2014 | JPower Sources2014，251，2： | 1 |
| 13 | Thermal runaway features of large format prismatic lithium ion battery using extended volume accelerating rate calorimetry显示文摘 | Xuning Feng Mou Fang Xiangming He Minggao Ouyang Languang Lu Hao Wang Mingxuan Zhang | 2014 | Journal of Power Sources2014，，： | 1 |
| 14 | A review on the key issues for lithium-ion battery man- agement in electric vehicles 显示文摘 | LU Languang HAN Xuebing LI Jianqiu | 2013 | Journal of Power Sources2013，226，： | 1 |
| 15 | A review on the key issues for lithium-ion battery management in electric vehicles 显示文摘 | LU Languang HAN Xuebing LI Jiangqiu | 2013 | JPower Sources2013，226，1： | 1 |
| 16 | In-depth investigation of the exothermic reactions between lithiated graphite and electrolyte in lithium-ion battery显示文摘Thermal runaway is a critical issue for the large application of lithium-ion batteries.Exothermic reactions between lithiated graphite and electrolyte play a crucial role in the thermal runaway of lithium-ion batteries.However,the role of each component in the electrolyte during the exothermic reactions with lithiated graphite has not been fully understood.In this paper,the exothermic reactions between lithiated graphite and electrolyte of lithium-ion battery are investigated through differential scanning calorimetry(DSC) and evolved gas analysis.The lithiated graphite in the presence of electrolyte exhibit three exothermic peaks during DSC test.The reactions between lithiated graphite and LiPF_(6) and ethylene carbonate are found to be responsible for the first two exothermic peaks,while the third exothermic peak is attributed to the reaction between lithiated graphite and binder.In contrast,diethylene carbonate and ethyl methyl carbonate contribute little to the total heat generation of graphite-electrolyte reactions.The reaction mechanism between lithiated graphite and electrolyte,including the major reaction equations and gas products,are summarized.Finally,DSC tests on samples with various amounts of electrolyte are performed to clarify the quantitative relationship between lithiated graphite and electrolyte during the exothermic reactions.2.5 mg of lithiated graphite (Li_(0.8627)C_(6)) can fully react with around 7.2 mg electrolyte,releasing a heat generation of 2491 J g^(-1).The results presented in this study can provide useful guidance for the safety improvement of lithium-ion batteries. | Yuejiu Zheng Zhihe Shi Dongsheng Ren Jie Chen Xiang Liu Xuning Feng Li Wang Xuebing Han Languang Lu Xiangming He Minggao Ouyang | 2022 | Journal of Energy Chemistry2022，31，6： | 1 |
| 17 | A semi-empirical voltage degradation model for a low-pressure proton exchange membrane fuel cell stack under bus city driving cycles显示文摘 | Languang Lu Minggao Ouyang Haiyan Huang Pucheng Pei Fuyuan Yang | 2006 | Journal of Power Sources2006，，1： | 1 |
| 18 | A semi-empirical voltage degradation model for a low-pressure proton exchange membrane fuel cell stack under bus city driving cycles显示文摘 | LU Languang OUYANG Minggao HUANG Haiyan | 2007 | Journal of Power Sources2007，164，1： | 1 |
| 19 | Parameter-independent error correction for potential measurements by reference electrode in lithium-ion batteries显示文摘The safety monitoring of lithium-ion batteries(LIBs) is of great significance for realizing all-climate and full-lifespan battery management. In-situ measurement of anode potential with implanted reference electrodes(REs) has proven to be effective to monitor and avoid the occurrence of severe side reactions like Li plating to ensure the safe and fast charging. However, the intrinsic measurement errors caused by local blocking effects, which also can be referred to as potential artefacts, are seldom taken into consideration in existing studies, yet they highly dominate the correctness of conclusions inferred from REs. In this study, aiming at exploring the physical origin of the measurement errors and ensure reliable potential monitoring, electrochemical and post-mortem tests are conducted using commercial pouch cells with implanted REs. Corresponding electrochemical model which describes the blocking effects, is established to validate the abnormal absence of lithium plating that predicted by measured anode potentials under various charging rates. Theoretical derivation is further presented to explain the error sources, which can be attributed to increased local liquid potential of the RE position. Most importantly, with the guidance of error analysis, a novel parameter-independent error correction method for RE measurements is proposed for the first time, which is proven to be adequate to estimate the real anode potentials and deduce the critical C-rate of Li plating with extra safety margin. After error correction, the resulting critical C-rates are all within the range of 0.55 ± 0.03 C, which is close to the C-rate of 0.6–0.7 C obtained from experiments. In addition, this error correction method can be performed conveniently with only some simple RE measurements of polarization voltages, totally independent of battery electrochemical and geometric parameters. This study provides highly practical error correction method for RE measurements in real LIBs, substantially facilitating the fast diagnosis and safety evaluation of Li plating during charging of LIBs. | Yalun Li Xinlei Gao Xuning Feng Xuebing Han Jiuyu Du Languang Lu Minggao Ouyang | 2022 | Journal of Energy Chemistry2022，31，4： | 0 |
| 20 | Thermal Runaway Characteristics and Modeling of LiFePO4 Power Battery for Electric Vehicles显示文摘LiFePO_(4)(LFP)lithium-ion batteries have gained widespread use in electric vehicles due to their safety and longevity,but thermal runaway(TR)incidents still have been reported.This paper explores the TR characteristics and modeling of LFP batteries at different states of charge(SOC).Adiabatic tests reveal that TR severity increases with SOC,and five stages are identified based on battery temperature evolution.Reaction kinetics parameters of exothermic reactions in each TR stage are extracted,and TR models for LFP batteries are established.The models accurately simulate TR behaviors at different SOCs,and the simulated TR characteristic temperatures also agree well with the experimental results,with errors of TR characteristic temperatures less than 3%.The prediction errors of TR characteristic temperatures under oven test conditions are also less than 1%.The results provide a comprehensive understanding of TR in LFP batteries,which is useful for battery safety design and optimization. | Tao Sun Luyan Wang Dongsheng Ren Zhihe Shi Jie Chen Yuejiu Zheng Xuning Feng Xuebing Han Languang Lu Li Wang Xiangming He Minggao Ouyang | 2023 | Automotive Innovation2023，6，3： | 0 |
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