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Experimental determination of heat generation rates of lithium-ion batteries by thermal protection method

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Science China Technological Sciences 2024年第12期67卷 3647-3658页

作者： SHI JingHe ZHANG HengYun YU Hong WANG XiaoLin school of Mechanical and Automotive engineering Shanghai University of Engineering Science school of engineering University of Tasmania

Experimental determination of heat generation rates is crucial in the thermal safety design of automotive batteries. A thermal protection method(TPM) is proposed to determine the heat generation rates of 18650 cylindrical lithium-ion batteries under different discharge rates. The physical model based on the thermal protection method is established, and its feasibility is demonstrated through theoretical analysis. In the experimental setup, by introducing lateral thermal protection batteries(TPB) to minimize the heat loss of the center test battery(CTB), heat generation rates of the battery can be obtained based on the temperature change of the CTB. The average heat generation rates of the battery at 1, 2, and 3 C discharge rates are found to be0.255, 0.844, and 1.811 W, respectively, which can be quadratically correlated with the discharge rate. In addition, a benchmark test of the present measurement against the commonly used accelerating rate calorimeter(ARC) was conducted. Relatively small deviations of 3.77%, 4.20%, and 1.09% were identified in the heat generation rates for the discharge rates at 1, 2, and 3 C. In comparison with the ARC equipment, the present TPM can be more representative of the transient battery heat generation characteristics with a much shorter time for thermal equalization. Finally, to further verify the accuracy of the present method,standard samples of the same size as the actual battery were made, which were capable of controlling heat generation through a direct current power supply. A comparison of the heat inputs of the standard sample with the heat generation rates measured by the thermal protection method shows a relative deviation of 1.01% maximum. With high measurement accuracy and an easy-tobuild experimental setup, the proposed method has promising prospects in automotive applications.

关键词： lithium-ion batteries thermal protection method transient heat generation rate average heat generation rate

Asynchronous consensus for optimal power flow control in smart grid with zero power mismatch

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Journal of Modern Power Systems and Clean Energy 2018年第3期6卷 412-422页

作者： Benjamin S.MILLAR Danchi JIANG school of engineering and ICT University of Tasmania

The heterogeneous nature of smart grid components and the desire for smart grids to be scalable,stable and respect customer privacy have led to the need for more distributed control paradigms. In this paper we provide a distributed optimal power flow solution for a smart distribution network with separable global costs, separable non-convex constraints, and inseparable linear constraints,while considering important aspects of network operation such as distributed generation and load mismatch, and nodal voltage constraints. An asynchronous averaging consensus protocol is developed to estimate the values of inseparable global information. The consensus protocol is then combined with a fully distributed primal dual optimization utilizing an augmented Lagrange function to ensure convergence to a feasible solution with respect to power flow and power mismatch constraints. The presented algorithm uses only local and neighbourhood communication to simultaneously find the mismatch between power generation, line loss and loads, to calculate nodal voltages,and to minimize distributed costs, leading to a completely distributed solution of the global problem. An IEEE test feeder system with a reasonable number of nodes is used to illustrate the proposed method and efficiency.

关键词： Consensus protocol Cooperative system Distributed algorithm Distributed control Optimization Smart grid

Feasible synthesis of porous h-BN by Mg^(2+)induced lattice dislocations for hydrogen and ammonia storage

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Nano Research 2025年第1期18卷 94-99页

作者： Xiaojia Huang Zihao Wang Yihan Kong Li Jiang Baolin Wang Jiangtao Jia Heping Ma Guangshan Zhu Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education Northeast Normal UniversityChangchun 130024China school of Chemical engineering and Technology Xi’an Jiaotong university Xi’an 710049China

Hexagonal boron nitride(h-BN)is a two-dimensional(2D)layered material with a structure similar to graphite and it has potential as a hydrogen and ammonia storage ***,dense packing in the standard h-BN structure limits its surface area and prevents the B and N from being adsorption *** this study,the addition of Mg^(2+)during h-BN synthesis facilitated the growth of lattice dislocations and led to a crosslinked three-dimensional(3D)porous structure.A proposed formation mechanism for porous h-BN was confirmed by several characterization routes,most clearly by high-resolution transmission electron microscopy(HRTEM).Porous Mg/BNs exhibited high H_(2)and NH_(3)uptakes and showed potential for H_(2)and NH_(3)storage.

关键词： hexagonal boron nitride porous material dislocation gas storage

Constrained coordinated distributed control of smart grid with asynchronous information exchange

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Journal of Modern Power Systems and Clean Energy 2015年第4期3卷 512-525页

作者： Benjamin MILLAR Danchi JIANG Md.Enamul HAQUE school of engineering&ICT University of TasmaniaHobartAustralia school of engineering Deakin UniversityMelbourneAustralia

Smart grid constrained optimal control is a complex issue due to the constant growth of grid complexity and the large volume of data available as input to smart device *** this context,traditional centralized control paradigms may suffer in terms of the timeliness of optimization results due to the volume of data to be processed and the delayed asynchronous nature of the data *** address these limits of centralized control,this paper presents a coordinated,distributed algorithm based on distributed,local controllers and a central coordinator for exchanging summarized global state *** proposed model for exchanging global state information is resistant to fluctuations caused by the inherent interdependence between local controllers,and is robust to delays in information *** addition,the algorithm features iterative refinement of local state estimations that is able to improve local controller ability to operate within network *** of the proposed coordinated,distributed algorithm through simulation shows its effectiveness in optimizing a global goal within a complex distribution system operating under constraints,while ensuring network operation stability under varying levels of information exchange delay,and with a range of network sizes.

关键词： Smart grid Distributed optimization Demand-side management Distributed generation Distributed storage Approximate dynamic programming

Integration of evacuated solar collectors with an adsorptive ice maker for hot climate region

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Energy and Built Environment 2022年第2期3卷 181-189页

作者： Nishant Modi Bhargav Pandya College of Sciences and engineering University of TasmaniaTasmaniaAustralia school of Chemical engineering University of BirminghamBirminghamUnited Kingdom

This research study compares the steady-state and dynamic behaviour of a solar-powered activated carbon-35(AC35)/methanol-based vapour adsorption refrigeration system for production of ice at hot climate ***-modynamic comparisons are made with the coefficient of performance(COP),system COP(SCOP),specific refrig-eration capacity(SRC)and critical parameters such as cycle time and ice production rate are ***,the sustainability of the proposed ice maker has proven by integrating economic and environmental *** minimum solar flux required to ensure continuous ice production was found 800 W/m^(2).Moreover,the max-imum ice production rate and COP were decreased by 32.36%and 37.63%respectively when the system was operated under real ambient *** proposed solar adsorptive ice maker achieved maximum SRC of 61.6 g m^(−2)during April month and reduced the CO_(2)emissions by 12.82 ton annually.

关键词： Solar cooling system Adsorption refrigeration cycle Ice production rate Activated carbon-35(AC35)/Methanol GHG emissions Simple payback period

Adult myelination: wrapping up neuronal plasticity

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Neural Regeneration Research 2014年第13期9卷 1261-1264页

作者： Megan O’Rourke Robert Gasperini Kaylene M.Young Menzies Research Institute tasmania University of Tasmania The school of Medicine University of Tasmania

In this review, we outline the major neural plasticity mechanisms that have been identified in the adult central nervous system （CNS）, and offer a perspective on how they regulate CNS function. In particular we examine how myelin plasticity can operate alongside neurogenesis and synaptic plasticity to influence information processing and transfer in the mature CNS.

关键词： oligodendrocyte OPC adult central nerrous system NG2 oligodendrogenesis plasticity remodelling myelination neural stem cells synapse

A Flux Based Approximation to Simulate Coupled Hydromechanical Problems for Mines with Heterogeneous Rock Types Using the Material Point Method

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Computer Modeling in engineering & Sciences 2022年第4期131卷 379-409页

作者： Gysbert Basson Andrew P.Bassom Brian Salmon Institute of Mine Seismology and university of tasmania Kingston7050Australia school of Natural Sciences-university of tasmania Sandy BayHobart7001Australia school of engineering-university of tasmania Sandy BayHobart7001Australia

Advances in numerical simulation techniques play an important role in helpingmining engineers understand those parts of the rock mass that cannot be readily *** Material Point Method(MPM)is an example of such a tool that is gaining popularity for studying geotechnical *** recent years,the original formulation of MPM has been extended to not only account for simulating the mechanical behaviour of rock under different loading conditions,but also to describe the coupled interaction of pore water and solid phases in *** methods assume that the permeability of mediums is homogeneous,and we show that these MPM techniques fail to accurately capture the correct behaviour of the fluid phase if the permeability of the material is *** this work,we propose a novel implementation of the coupled MPM to address this *** employ an approach commonly used in coupled Finite Volume Methods,known as the Two Point Flux Approximation(TPFA).Our new method is benchmarked against two well-known analytical expressions(a one-dimensional geostatic consolidation and the so-called Mandel-Cryer effect).Its performance is compared to existing coupled MPM approaches for homogeneous *** order to gauge the possible effectiveness of our technique in the field,we apply ourmethod to a case study relating to a mine known to experience severe problems with pore water.

关键词： Fluid permeability Material Point Method mining faults

What are the evolutionary origins of stomatal responses to abscisic acid in land plants?

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Journal of Integrative Plant Biology 2017年第4期59卷 240-260页

作者： Frances C. Sussmilch Timothy J. Brodribb Scott A. M. McAdam school of Biological Sciences University of Tasmania Hobart Tasmania Australia

The evolution of active stomatal closure in response to leaf water deficit, mediated by the hormone abscisic acid （ABA）, has been the subject of recent debate. Two different models for the timing of the evolution of this response recur in the literature. A single-step model for stomatal control suggests that stomata evolved active, ABA- mediated control of stomatal aperture, when these structures first appeared, prior bryophyte and vascular plant gradualistic model for stomatal to the divergence of neages. In contrast, a control proposes that the most basal vascular plant stomata responded passively to changes in leaf water status. This model suggests that active ABA-driven mechanisms for stomatal responses to water status instead evolved after the divergence of seed plants, culminating in the complex, ABA-mediated responses observed in modern angiosperms. Here we review the findings that form the basis for these two models, including recent work that provides critical molecular insights into resolving this intriguing debate, and find strong evidence to support a gradualistic model for stomatal evolution.

关键词： ABA What are the evolutionary origins of stomatal responses to abscisic acid in land plants acid

K^+ retention in leaf mesophyll, an overlooked component of salinity tolerance mechanism:A case study for barley

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Journal of Integrative Plant Biology 2015年第2期57卷 171-185页

作者： Honghong Wu Min Zhu Lana Shabala Meixue Zhou Sergey Shabala school of Land and Food University of Tasmania

Plant salinity tolerance is a physiologically complex trait, with numerous mechanisms contributing to it. In this work, we show that the ability of leaf mesophyll to retain K＋ represents an important and essentially overlooked component of a salinity tolerance mechanism. The strong positive correlation between mesophyll K＋ retention ability under saline conditions （quantified by the magnitude of NaCl-induced K＋ efflux from mesophyll） and the overall salinity tolerance （relative fresh weight and/or survival or damage under salinity stress） was found while screening 46 barley （Hordeum vulgare L.） genotypes contrasting in their salinity tolerance. Genotypes with intrinsically higher leaf K＋ content under control conditions were found to possess better K＋ retention ability under salinity and, hence, overall higher tolerance. Contrary to previous reports for barley roots, K＋ retention in mesophyll was not associated with an increased H＋-pumping in tolerant varieties but instead correlated negatively with this trait. These findings are explained by the fact that increased H＋ extrusion may be needed to charge balance the activity and provide the driving force for the high affinity HAK/KUP K＋ transporters required to restore cytosolic K＋ homeostasis in salt-sensitive genotypes.

关键词： Cytosolic K+ homeostasis ion flux membrane potential membrane transport tissue tolerance