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This paper describes an energy management strategy for an electric vehicle (EV). The proposed EV architecture contains a pack of the batteries which presents the energy source and a pack of the supercapacitors (SC) used as power source. The pack of the batteries produces the necessary energy to move forward the vehicle while the pack of the SC produces the lacking power in acceleration and in braking...
During the utilization of PHEV, frequently discharge and charge cycles will inevitably lead to the battery aging, which affects the energy management and further affects the vehicular economy. The main purpose of this paper is to investigate the influence of battery aging on energy management economy for PHEV. Four lithium cells under different SoH are used to represent four different aging conditions...
Wireless power transfer has been introduced as a proper replacement for conventional cable power transfer systems recently. With the developments of the electric transportation, transferring power wirelessly has been found to introduce several advantages in charging Lithium-Ion batteries. Among different configurations of wireless power transfer, Series Parallel structure is found to be more interesting...
Telecommunications networks have been transitioning from a centralized to distributed architecture. With Fiber extending deeper into the wireline network and Small Cells becoming a more prevalent means for targeting hard-to-reach subscribers, there has been significant growth in the number of network elements located far from the central switching office. The sheer quantity of network devices increases...
Numerous Li-Ion cell manufacturers currently have currently produced all different kinds of 18650 cylindrical Li-Ion cells with a purpose of operating source of electric-powered application such as electric vehicle (EV), hybrid electric vehicle (HEV), and small-scale energy storage system (ESS). In general, for achieving the efficient and stable operation of above applications, each cell qualification...
Wireless charging of electric vehicles (EVs) is going to play a major role in electrification of transportation. This paper proposes to utilize an LCL tuned primary and series tuned secondary with a secondary buck regulator to achieve power transfer control by secondary side control only. Analytical expressions for base (primary) coil current and transformer turns ratio N required to transfer the...
This paper proposes a new battery management system (BMS) for a series string of battery cells. The proposed control structure is based on a duality of the adaptive droop control theory used in grid / microgrid connected sources. The presented BMS control structure yields higher reliability compared to the conventional ones due to its decentralization features and its communication-less ability. The...
In this paper, a novel modeling method of battery pack for an optimal design and effective managements of battery is suggested. The proposed modeling method using single cell information makes an optimal design of battery pack possible by expecting the characteristics of the battery pack before the battery pack is manufactured. Also, the proposed battery pack model can be highly utilized in the battery...
This paper proposes an advanced state of function (SOF) estimation algorithm to determine the cranking capability of starting lighting ignition (SLI) battery. This algorithm defines the cranking resistance describing the voltage drop right after the time of cranking. And in order to increase the estimation accuracy against the effect of unpredictable battery parameter changes, a process of online...
Multilevel converters are an emerging industrial technology and are the subject of a substantial amount of research. However, they are yet to find their way into many mainstream engineering applications. This paper presents a method of quantifying the benefits and disadvantages of multilevel converters of increasing order. The analysis focuses on the cascaded H-bride topology for grid-tie battery...
In stable electrical networks, such as the German one, the service of uninterruptible power supply (UPS) systems is only rarely called. Consequently the battery lifetime in this application is mostly restricted by calendar aging. The concept of multi-use describes here the delivery of additional services with a UPS during stable grid operation. The overall goal is to allocate the battery capacity...
Off-highway dump truck contains amounts of potential energy and kinetic energy. During the braking process, these two parts are consumed in the form of heat on the braking resistance, and the energy consumption will be about 24 percent of total energy consumption of the Truck. Hence, it is necessary to recover the braking energy. This paper, aiming at the characteristics of electric drive system in...
The structure and working principle of hybrid energy storage system are introduced. The classical RC model of ultracapacitor is analyzed, and the topology of charging and discharging converter of energy storage system is studied. A ultracapacitor-battery hybrid energy storage system model based on bidirectional boost-buck circuit is constructed, and the charging and discharging process of the energy...
A dc-based low-voltage power supply offers many advantages over the historically grown ac voltage infrastructure. The paper shows the potentials for cost reduction, efficiency enhancement and equipment miniaturization through new cognitive power electronics, but also discusses the obstacles to a faster market penetration of dc microgrids. These include aspects of grid control, grid stability, security...
This work shows analysis and design of a non-inverter asynchronous buck-boost dc-to-dc converter as a battery charger for an MPPT solar system. Circuit design, simulations and implementation are also shown for a solar panel with variable load.
In modern transport industry there is a tendency for electric vehicles with independent power supply to increase their amount, particularly it seems to appear in the fast development of electric cars. Nevertheless, there are still some flaws in electric vehicle drives to be improved. The element of an electric drive that limits the performance of the vehicle is almost always power supply. Li-Ion accumulators,...
This paper faces the technical and economic challenges related to the design of a green recharge area for electric vehicles at the Campus of Palermo, Italy, with the aim of reduce both costs and pollution connected to the charging process. Based on the behaviour of the student population, the electrical load is identified and two possible solutions are evaluated to manage the peak load: an orientation...
LiFePO4 battery has been widely used in electric vehicles due to high safety and long cycle life. This paper firstly analyses the basic characteristics of LiFePO4 battery including the capacity and internal resistance. Secondly, particle filter (PF) algorithm is introduced to predict the remaining useful life (RUL) of LiFePO4 battery effectively. Based on the LiFePO4 battery life degradation data,...
A hierarchical structure energy storage (ES) system for photovoltaic (PV) power generation is proposed to make the most use of various kinds of ES devices and reduce cost. The ESs with quick response speed like supercapacitor is used to smooth the variations of PV power; the ESs with large capacity like battery is used to reduce peak and fill valley. The power fluctuations of PV in multiple regions...
Electric models of battery have to take into account the effect of temperature for the state-of-charge estimation. As a matter of fact, at low temperature the driving range of the vehicle can be overestimated up to more than 20% with electric only models. We propose to couple thermal and electric battery models for improving the range estimation.
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