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Lithium-ion batteries are characterized by having very good performance in terms of efficiency, lifetime, and self-discharge, which allowed them to become the major player in the electric vehicle applications. However, they were not able to totally overcome the EV range anxiety. Thus, research is carried out nowadays to develop batteries with even higher gravimetric energy density, which should allow...
Pushed through an increasing amount of renewable energy sources in the German grid, the fluctuation in energy generation rises. Therefore, a balancing system which takes the grid stabilizing role is necessary. Depending on the time periods of the chosen sales channels, different storage systems can be used. For short and middle time spans an electrochemical system like a battery energy storage system...
The paper deals with the transformation of the existing bus shelters for the public transport into smart systems equipped with Wi-Fi stations, USB chargers and Air Quality Control Station. The proposed smart shelters are renewable energy producer since they are equipped with PV modules. The location of the most suitable bus shelters is defined by solar irradiation maps based on a GIS tool. Four solutions...
This paper introduces a combined temperature and displacement sensor for new measurements of physical parameters which can inform multi-physics based models of Li-ion batteries. These flexible sensors can be placed directly on the cell to measure intercalation effects which can improve battery state estimation. The sensors were characterized on individual Panasonic cells and subsequently, packaged...
Museum environmental monitoring is an important issue for the artifact conservation. Many solutions have been proposed to tackle this problem, but the museum constraints prevent an easy application in several cases, especially if the monitoring has to be performed in museums where an environmental control system has been already installed. This paper describes a simple though powerful solution, which...
The paper presents a modelling approach which, starting from experimental measurements, allows automatically deriving a lithium-ion battery electrical model. This procedure is applied to a 47.7 kW lithium-manganese oxide battery unit in order to infer a third-order Thevenin equivalent electrical model of the unit itself. By means of a matrix representation of specific experimental measurements, it...
Battery energy capacity in an application system is determined by the amount of electrical energy spent to the load and time consumption. The system reliability depends on the supply of electrical energy from the battery as the power source. The energy capacity of the battery will ensure the services provided by the unit device or equipment. As an example, the UPS system provides clean, conditioned,...
DC grid has gained a special attention by many researchers, especially in the last decade. The two main factors that emphasize the DC grid area of study include the DC nature of the majority of Distributed Generation (DG) sources, as well as the emerging of new DC loads that need several power conversion stages when connected into the current AC network. Therefore, it is needed to study the possibility...
In order to analyze the dynamic behavior of a Lithium-ion (Li-ion) battery and to determine their suitability for various applications, battery models are needed. An equivalent electrical circuit model is the most common way of representing the behavior of a Li-ion battery. There are different circuit models proposed and various techniques for parameterization of these models available in literature...
Renewable energy gain a lot of attention due to rapid energy consumption growth and environmental issue especially solar power. This paper aim to present the designed and analysis of solar water pump to replace conventional diesel water pump that agriculturist currently used. The prototypes of solar water pump have been built and installed at southern province of Thailand. The prototype of proposed...
The heat generation of a 20Ah lithium iron phosphate pouch battery is characterized in this paper through the conduction of isothermal calorimeter measurements. The influence of temperature and current on battery heat generation is examined by including different operating conditions to the testing matrix, and the influence of the SOC on the battery heat rates is also studied throughout stepped current...
Miniature sensor nodes are ideal for monitoring environmental conditions in emerging applications such as oil exploration. One key requirement for sensor nodes is embedded non-volatile memory for compact and retentive data storage in the event that the sensor power source is exhausted. Non-volatile memory also allows for near-zero standby power modes, which are particularly challenging to achieve...
Utilization of renewable energy such as photovoltaic power generation and wind power generation is useful to reduce the transport volume of fuel Showa Base in the Antarctica from Japan. However, when a lot of renewable energy systems are connected to the small electric system of the Showa Base, it is possible that the frequency of electric system of Showa Base is not stable. Though the use of battery...
A virtual measurement system has been developed in LabView environment for testing the main characteristics of photovoltaic (PV) modules. The survey was conducted with an autonomous PV system, built of two modules - one stationary and the other tracking the position of the Sun. Using the virtual measurement system are recorded the temperature of PV modules, the levels of generated current and voltage,...
In this paper, the battery pack electro-thermal model is established and three different cooling optimization measures (thermal grease filling, heat sink by aluminum palte and wind cooling) are simulated to verify their effectiveness. The simulation reveals that the thermal grease filling method will reduce 3.75℃, the heat sink by aluminum plate will reduce 5.14℃,and the wind cooling...
In this experiment-based research, the performance and behaviour of a pouch type Li-ion battery cell are reported. The commercial test cell has a Lithium Titanate Oxide (LTO) based anode with 13Ah capacity. It is accomplished by measuring the evolution of surface temperature distribution, and the heat flux of the battery cell at the same time. Temperatures on the surface of the cell are measured using...
Prognostics of failures is very important for health management of Li-ion batteries and has received increasing attention from both researchers and practitioners in recent years. In practice, a Li-ion battery system often works under variable operating states, which is usually caused by the evolving environment or the different operational conditions. Thus, for remaining useful cycles (RUC) prognostics...
Constant current-constant voltage (CC-CV) charging and pulse current charging are the usual methods for charging Li-ion batteries. Because we are lack of the direct in-situ measurement of Li-ion battery's internal state, both of the two charging methods are controlled without feedbacks from inside of the battery. A new charging method is proposed in this paper based on electrochemical-thermal coupling...
This paper deals with the use of Lithium Batteries at high pulses discharge rate. The use of a commercial nanophosphate-based ultra high power Li-Ion cell discharged by high current pulses is analyzed by means of an ad — hoc experimental setup. Main cell parameters like nominal capacity, internal impedance, discharge efficiency are measured and discussed. An ad — hoc test procedure and a new strategy...
This paper adopts a circuit model with temperature-dependent parameter values to investigate the current unbalance risk in parallel-connected lithium-ion (Li-ion) battery cells and uses this circuit model to calculate heat dissipation. The paper first investigates use of the battery model to explain the impact of temperature on current unbalance in parallel-connected Li-ion battery cells. Experimental...
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