Influence of Electrode Active Materials on Safety Performance of Large and High-Power Li-Ion Batteries for Hybrid Electric Vehicles

The increasing oil price, energy demand, and environmental concern are leading to a global switch towards Plug-In Hybrid Electric Vehicles (PHEVs). In a PHEV, Li-ion battery is considered as the primary propelling source. Therefore, an accurate battery model is required to predict theI-Vcharacteristic and dynamic behavior of a battery. This paper presents a highly effective thermoelectric model of Li-ion battery developed in Simulink. An algorithm is proposed for estimation of state of charge (SOC) and open circuit voltage (OCV) adaptively to notify the exact SOC level for better utilization of battery power and optimal vehicle performance. Thermal behavior of Li-ion battery is investigated for wide temperature range and its effect on resistance, capacity, and OCV is recorded. The minimum SOC level to which battery can get depleted is calculated using gradient method. The proposed simulation results are analyzed with those of earlier models and found to be better.

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3508 Topology optimization for high power motors used in hybrid electric vehicles

The Proceedings of Design & Systems Conference ◽

10.1299/jsmedsd.2015.25._3508-1_ ◽

2015 ◽

Vol 2015.25 (0) ◽

pp. _3508-1_-_3508-7_

Author(s):

Shintaro YAMASAKI ◽

Yasunari NISHIKAWA ◽

Atsushi KAWAMOTO ◽

Akira SAITO ◽

Masakatu KUROISHI ◽

...

Keyword(s):

Topology Optimization ◽

Electric Vehicles ◽

High Power ◽

Hybrid Electric Vehicles ◽

Hybrid Electric

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On the Hybridization of Microcars with Hybrid UltraCapacitors and Li-Ion Batteries Storage Systems

Energies ◽

10.3390/en13123230 ◽

2020 ◽

Vol 13 (12) ◽

pp. 3230 ◽

Cited By ~ 1

Author(s):

Fernando Ortenzi ◽

Natascia Andrenacci ◽

Manlio Pasquali ◽

Carlo Villante

Keyword(s):

Energy Storage ◽

Electric Vehicles ◽

Hybrid Electric Vehicles ◽

Storage Systems ◽

Specific Power ◽

Li Ion Batteries ◽

Energy Storage Systems ◽

Current Output ◽

Hybrid Storage ◽

Li Ion

The objective proposed by the EU to drastically reduce vehicular CO2 emission for the years up to 2030 requires an increase of propulsion systems’ efficiency, and accordingly, the improvement their technology. Hybrid electric vehicles could have a chance of achieving this, by recovering energy during braking phases, running in pure electric mode and allowing the internal combustion engine to operate under better efficiency conditions, while maintaining traditionally expected vehicle performances (mileage, weight, available on-board volume, etc.). The energy storage systems for hybrid electric vehicles (HEVs) have different requirements than those designed for Battery Electric Vehicles (BEVs); high specific power is normally the most critical issue. Using Li-ion Batteries (LiBs) in the designing of on-board Energy Storage Systems (ESS) based only on power specifications gives an ESS with an energy capacity which is sufficient for vehicle requirements. The highest specific power LiBs are therefore chosen among those technologically available. All this leads to an ESS design that is strongly stressed over time, because current output is very high and very rapidly varies, during both traction and regeneration phases. The resulting efficiency of the ESS is correspondingly lowered, and LiBs lifetime can be relevantly affected. Such a problem can be overcome by adopting hybrid storage systems, coupling LiBs and UltraCapacitors (UCs); by properly dimensioning and controlling the ESS’ components, in fact, the current output of the batteries can be reduced and smoothed, using UCs during transients. In this paper, a simulation model, calibrated and validated on an engine testbed, has been used to evaluate the performances of a hybrid storage HEV microcar under different operative conditions (driving cycles, environment temperature and ESS State of Charge). Results show that the hybridization of the powertrain may reduce fuel consumption by up to 27%, while LiBs lifetime may be more than doubled.

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