Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
In this paper a battery model for life-preserving conditions is developed. For the identified adverse effects, a battery operation range is defined. The operation range is wide enough to obtain good performance of the battery but it also prevents battery malfunctioning and the need of battery replacement decreases. With a close-up operation range, a new mathematical battery model with both accuracy...
In a scenario of small and customized production of electric vehicle, it is important to set methods and tools to evaluate the Li-Ion cells heat source in EV battery. The main problem of the new lithium batteries is represented by the need to keep the battery packs at uniform and constant temperatures and avoid peaks of temperatures which cause degradation of performance and safety problem. The main...
Being able to predict the Li-ion battery degradation is necessary for applications such as electric vehicles (EVs) and hybrid ones (HEVs). Most of the time, battery life prediction is based on accelerated cycling datasets obtained under different conditions. However, cell aging occurs not only during cycling but also at rest (calendar mode), the latter representing about 90 % of its lifetime. In this...
High power lithium iron phosphate (LFP) batteries suitable for Electric Vehicles are tested in this work. An extended cycle-life testing is carried out, consisting in various types of experiments: standard cycling, optimized fast charge with high constant current discharge (4 C) and simulating driving dynamic stress protocols (DST). The fast charge/DST discharge tests are carried out with depth of...
Battery is a critical component of an electric vehicle and electric non-road mobile machinery. The performance of a battery system must be assessed by experimental testing to achieve high reliability. This paper describes the development and validation of a battery pack for a mining load-haul-dump loader application. The typical duty cycle is used as a validation power profile.
Measuring mileage per charge (range) of Electric Vehicles takes long time in the Japanese type approval test. In order to reduce the test duration, existing test cycle: JC08 mode was modified. “Condensed JC08 mode” was prepared as a modified test cycle. This test cycle has almost the same load or energy consumption as JC08 mode and its testing duration can be reduced to three-quarters of that of JC08...
For pure electrical propelled vehicles, PEVs, a proper battery model is critical in order to estimate State of Charge, SOC, therefore enabling predicting performance and ensuring safe battery operation. Present methods can be classified as electrochemical, electrical equivalent circuits, stochastic and analytical, these last ones based on solution of Partial Differential Equations. These methods are...
Two aspects of the life cycle testing of lithium-ion batteries were studied-(1) the effect of fast charging (4C) on cycle life and (2) extended cycling of cells beyond first-use requirements for second-use applications. In the case of the fast charging studies, the test data indicate that the Ah capacity of the lithium titanate oxide (LTO) cells is essentially independent of charge rate up to 6C with...
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...
This paper presents the electrical and thermal behaviour of an advanced lithium-ion capacitor (LIC) based rechargeable energy storage systems. In the proposed study, an extended statistical analysis has been performed to evaluate the main electrical parameters such as resistance, power, capacitance, rate capabilities, variation between cells and thermal parameters. Based on the performed analysis,...
Due to the dynamic conditions during the driving operation with rarely deep discharging, the on-board evaluation of the total capacity of the battery pack in a plug-in hybrid electric vehicle (PHEV) and electric vehicle (EV) is one of the most challenging tasks of a battery management system (BMS). In fact, the rapid dynamic variation of the current rate, the unsteady ambient temperature and stand...
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:...
The degradation mechanisms of lithium iron phosphate battery have been analyzed with 150 day calendar capacity loss tests and 3,000 cycle capacity loss tests to identify the operation method to maximize the battery life for electric vehicles. Both test results indicated that capacity loss increased under higher temperature and SOC conditions. And also, large increase of internal resistance on the...
To predict the remaining useful life (RUL), commercially available lithium-ion cells of 63 Ah with nickel manganese cobalt oxide (NMC) cathode material underwent cycle life ageing tests at different current rates (C) and temperature. The key performance parameters such cell capacity, discharge capability and impedance were measured for fresh and aged cells to evaluate the RUL of the cells. The results...
Onboard Hybrid Electric Vehicles (HEV) and Battery Electric Vehicles (BEV), the Battery Management System (BMS) is of critical importance to ensure safe and reliable use of the electrical energy stored inside Li-ion batteries until the End-Of-Life (EOL) of the electrochemical system. At any time, the BMS must indicate the allowable current limits for charge and discharge (CMI: Charge Maximal Intensity...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.