为研究动力电池组内各单体电池的健康状态SOH(State of Health),对电池极化内阻和欧姆内阻特性进行分析.根据电池欧姆内阻提出相对健康状态的评价方法,并结合电池工作时内阻对端电压的影响,采用端电压对电池组内单体电池健康状态进行评...为研究动力电池组内各单体电池的健康状态SOH(State of Health),对电池极化内阻和欧姆内阻特性进行分析.根据电池欧姆内阻提出相对健康状态的评价方法,并结合电池工作时内阻对端电压的影响,采用端电压对电池组内单体电池健康状态进行评价.最后进行了对比实验验证,实验结果证明了所提方法的准确性和可行性.展开更多
以常用磷酸铁锂电池为研究对象,分析了电池欧姆内阻特性在不同放电倍率下的变化关系。通过混合脉冲功率特性(Hybrid Pulse Power Characteristic,HPPC)实验法,分析获得了电池欧姆内阻与放电倍率和荷电状态(State of Charge,SOC)之间的...以常用磷酸铁锂电池为研究对象,分析了电池欧姆内阻特性在不同放电倍率下的变化关系。通过混合脉冲功率特性(Hybrid Pulse Power Characteristic,HPPC)实验法,分析获得了电池欧姆内阻与放电倍率和荷电状态(State of Charge,SOC)之间的关系。研究结果表明,相同放电倍率下,电池欧姆内阻随着电池SOC的减小而增大;相同电池SOC状态下,电池欧姆内阻随着放电电流的增大而增大,从而明确了电池欧姆内阻受放电倍率和SOC共同影响。展开更多
Specific contact resistance to p-GaN was measured for various structures of Ni/Pd-based metals and thin(20-30 nm thick)p-InGaN/p^(+)-GaN contacting layers.The effects of surface chemical treatment and annealing temper...Specific contact resistance to p-GaN was measured for various structures of Ni/Pd-based metals and thin(20-30 nm thick)p-InGaN/p^(+)-GaN contacting layers.The effects of surface chemical treatment and annealing temperature were ex-amined.The optimal annealing temperature was determined to be 550°C,above which the sheet resistance of the samples de-graded considerably,suggesting that undesirable alloying had occurred.Pd-containing metal showed~35%lower com-pared to that of single Ni.Very thin(2-3.5 nm thick)p-InGaN contacting layers grown on 20-25 nm thick p^(+)-GaN layers exhib-ited one to two orders of magnitude smaller values of compared to that of p^(+)-GaN without p-InGaN.The current density de-pendence of,which is indicative of nonlinearity in current-voltage relation,was also examined.The lowest achieved through this study was 4.9×10^(-5)Ω·cm^(2)@J=3.4 kA/cm^(2).展开更多
电动汽车作为新型节能环保的交通工具之一,以常用磷酸铁锂电池为研究对象,分析电池欧姆内阻是否对荷电状态(State of Charge,SOC)的估算存在影响。通过不同放电倍率的混合脉冲功率特性(Hybrid Pulse Power Characteristic,HPPC)实验对...电动汽车作为新型节能环保的交通工具之一,以常用磷酸铁锂电池为研究对象,分析电池欧姆内阻是否对荷电状态(State of Charge,SOC)的估算存在影响。通过不同放电倍率的混合脉冲功率特性(Hybrid Pulse Power Characteristic,HPPC)实验对电池欧姆内阻进行了分析和辨识,并提出了一种实时修正欧姆内阻的原理和方法,以建立等效电路模型和滤波算法方法实现了在不同放电倍率下的SOC估算,报告了不同放电倍率下欧姆内阻对估算SOC及汽车容量信息显示存在影响的现状。研究结果表明,电池欧姆内阻对SOC估算及电动汽车剩余容量信息的显示具有直接的影响。展开更多
Interface engineering can improve the charge separation efficiency and inhibit photocorrosion is an emerging direction of developing more efficient and cost-effective photocatalytic systems.Herein,we report the sulfur...Interface engineering can improve the charge separation efficiency and inhibit photocorrosion is an emerging direction of developing more efficient and cost-effective photocatalytic systems.Herein,we report the sulfur-confined intimate Cd S intergrown Cd(Cd S/Cd)Ohmic junction(peanut-chocolate-ball like)for high-efficient H2production with superior anti-photocorrosion ability,which was fabricated from in-situ photoreduction of CdS intergrown Cd2SO4(OH)2(CdS/Cd2SO4(OH)2)prepared through a facile space-controlled-solvothermal method.The ratios of CdS/Cd can be effectively controlled by tunning that of CdS/Cd2SO4(OH)2which were prepared by adjusting the volume of reaction liquid and the remaining space of the reactor.Experiments investigations and density functional theory(DFT)calculations reveal that the Cd S intergrown Cd Ohmic junction interfaces(with appropriate content Cd intergrown on Cd S(19.54 wt%))are beneficial in facilitating the transfer of photogenerated electrons by constructing an interfacial electric field and forming sulfur-confined structures for preventing the positive holes(h+)oxidize the Cd S.This contributes to a high photocatalytic H2production activity of 95.40μmol h-1(about 32.3 times higher than bare Cd S)and possesses outstanding photocatalytic stability over 205 h,much longer than most Cd S-based photocatalysts previously reported.The interface engineering design inspired by the structure of peanut-chocolate-ball can greatly promote the future development of catalytic systems for wider application.展开更多
文摘为研究动力电池组内各单体电池的健康状态SOH(State of Health),对电池极化内阻和欧姆内阻特性进行分析.根据电池欧姆内阻提出相对健康状态的评价方法,并结合电池工作时内阻对端电压的影响,采用端电压对电池组内单体电池健康状态进行评价.最后进行了对比实验验证,实验结果证明了所提方法的准确性和可行性.
文摘以常用磷酸铁锂电池为研究对象,分析了电池欧姆内阻特性在不同放电倍率下的变化关系。通过混合脉冲功率特性(Hybrid Pulse Power Characteristic,HPPC)实验法,分析获得了电池欧姆内阻与放电倍率和荷电状态(State of Charge,SOC)之间的关系。研究结果表明,相同放电倍率下,电池欧姆内阻随着电池SOC的减小而增大;相同电池SOC状态下,电池欧姆内阻随着放电电流的增大而增大,从而明确了电池欧姆内阻受放电倍率和SOC共同影响。
基金the National Key Research and Development Program of China(2017YFE0131500)the Key Research and Development Program of Guangdong Province(2020B090922001)+2 种基金National Natural Science Foundation of China(61834008)Key Research and Development Program of Jiangsu province(BE2020004,BE2021008-1)Guangdong Basic and Applied Basic Research Foundation(2019B1515120091).
文摘Specific contact resistance to p-GaN was measured for various structures of Ni/Pd-based metals and thin(20-30 nm thick)p-InGaN/p^(+)-GaN contacting layers.The effects of surface chemical treatment and annealing temperature were ex-amined.The optimal annealing temperature was determined to be 550°C,above which the sheet resistance of the samples de-graded considerably,suggesting that undesirable alloying had occurred.Pd-containing metal showed~35%lower com-pared to that of single Ni.Very thin(2-3.5 nm thick)p-InGaN contacting layers grown on 20-25 nm thick p^(+)-GaN layers exhib-ited one to two orders of magnitude smaller values of compared to that of p^(+)-GaN without p-InGaN.The current density de-pendence of,which is indicative of nonlinearity in current-voltage relation,was also examined.The lowest achieved through this study was 4.9×10^(-5)Ω·cm^(2)@J=3.4 kA/cm^(2).
文摘电动汽车作为新型节能环保的交通工具之一,以常用磷酸铁锂电池为研究对象,分析电池欧姆内阻是否对荷电状态(State of Charge,SOC)的估算存在影响。通过不同放电倍率的混合脉冲功率特性(Hybrid Pulse Power Characteristic,HPPC)实验对电池欧姆内阻进行了分析和辨识,并提出了一种实时修正欧姆内阻的原理和方法,以建立等效电路模型和滤波算法方法实现了在不同放电倍率下的SOC估算,报告了不同放电倍率下欧姆内阻对估算SOC及汽车容量信息显示存在影响的现状。研究结果表明,电池欧姆内阻对SOC估算及电动汽车剩余容量信息的显示具有直接的影响。
基金supported by the National Natural Science Foundation of China(22162008,22162007)the Science and Technology Supporting Project of Guizhou Province([2022]208,[2021]480)the Basic Research Program of Science&Technology Department of Guizhou Province([2020]1Y055)。
文摘Interface engineering can improve the charge separation efficiency and inhibit photocorrosion is an emerging direction of developing more efficient and cost-effective photocatalytic systems.Herein,we report the sulfur-confined intimate Cd S intergrown Cd(Cd S/Cd)Ohmic junction(peanut-chocolate-ball like)for high-efficient H2production with superior anti-photocorrosion ability,which was fabricated from in-situ photoreduction of CdS intergrown Cd2SO4(OH)2(CdS/Cd2SO4(OH)2)prepared through a facile space-controlled-solvothermal method.The ratios of CdS/Cd can be effectively controlled by tunning that of CdS/Cd2SO4(OH)2which were prepared by adjusting the volume of reaction liquid and the remaining space of the reactor.Experiments investigations and density functional theory(DFT)calculations reveal that the Cd S intergrown Cd Ohmic junction interfaces(with appropriate content Cd intergrown on Cd S(19.54 wt%))are beneficial in facilitating the transfer of photogenerated electrons by constructing an interfacial electric field and forming sulfur-confined structures for preventing the positive holes(h+)oxidize the Cd S.This contributes to a high photocatalytic H2production activity of 95.40μmol h-1(about 32.3 times higher than bare Cd S)and possesses outstanding photocatalytic stability over 205 h,much longer than most Cd S-based photocatalysts previously reported.The interface engineering design inspired by the structure of peanut-chocolate-ball can greatly promote the future development of catalytic systems for wider application.
