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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...
Currently, battery electric vehicles are the most popular EV commercially available. However, there is a growing interest for fuel cell electric vehicles (FCVs) because the latest battery technologies do not ensure a comparable range to that of conventional vehicles. Nevertheless, due to the unidirectional nature of energy transformation in a FCV, auxiliary storage systems are necessary to recover...
This paper presents an offline state-of-health (SoH) estimation based on charge transfer resistance for high-power lithium-ion (Li-ion) batteries, such as lithium iron phosphate (LFP) batteries. As shown in the experimental results, the charge transfer resistance has a great aging change with battery degradation and good abilities against state-of-charge (SoC) drift and external resistance variation...
As lithium-ion batteries play an important role for the electrification of mobility due to their high power and energy density, battery lifetime prediction is a fundamental aspect for successful market introduction. This work shows the development of a lifetime prediction model based on accelerated aging tests. To investigate the impact of different voltages and temperatures on capacity loss and resistance...
The aim of this paper is to investigate the impact of the current ripple, originating from the dc-dc converter of e.g. a PHEV powertrain, on the ageing of Li-ion batteries. Most research concerning batteries focuses on very low (fxHz) to low (Hz) frequencies and low current ripples to create very accurate battery models which can determine e.g. the State of Charge of the battery. On the other hand...
The paper describes the development and realization of standard battery modules 12 V, made by LiFePO4 cells selected in a previous study by ENEA and the University of Pisa. Module means the group of four cells series connected, the electronic battery management system, the thermal management system and the mechanical case. Standard means that the same battery module can be used for different applications:...
Within electric and hybrid vehicles, batteries are used to provide/buffer the energy required for driving. However, battery performance varies throughout the temperature range specific to automotive applications, and as such, models that describe this behaviour are required. This paper presents a dynamic battery model describing the battery voltage based on current and temperature. A model identification...
This paper investigates the concepts of state-of-charge and state of health. The technical challenges that each method faces are discussed, in addition to current research methodologies that are conducted in the academy and industry. A proposed strategy is presented to prepare consumers to the application of these construct in every-day use of electric vehicles.
Air nozzles are the key constructional elements of the lithium battery films drying cabinets and have a great effect on drying efficiency and effectiveness even the running of whole drying system. The steady state flow fields of three kinds of air nozzles are obtained through numerical simulation method. This paper provides an investigation of the resistance characteristics and flow equalization characteristics...
The paper reports about a study that ENEA has been carrying out on the use of a storage system, composed by lithium batteries, in a cable railway plant, by presenting the design phase and the starting field tests. Following a preliminary study on a complete lithium-ion battery system, a cable railway of significant experimental interest was identified with the aim to verify the reduction in power...
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