Electric and Hybrid Vehicle Propulsion Battery System Safety Standard - Lithium-based Rechargeable Cells

2011 ◽  
Author(s):  
Keyword(s):  
Hybrid Vehicle ◽  
Safety Standard ◽  
System Safety ◽  
Battery System ◽  
Vehicle Propulsion

System Parameter Study for a Light-Weight Series Hydraulic Hybrid Vehicle

2014 ◽  
Author(s):  
Katharina Baer ◽  
Liselott Ericson ◽  
Petter Krus
Keyword(s):  
Fuel Efficiency ◽  
Hybrid Vehicle ◽  
Urban Traffic ◽  
Parameter Study ◽  
Hydraulic Hybrid ◽  
Component Sizing ◽  
Vehicle Propulsion ◽  
System Pressure ◽  
Light Duty Vehicle ◽  
Hydraulic Hybrid Vehicle

Amongst the hybrid vehicle propulsion solutions aiming to improve fuel efficiency, hybrid electric solutions currently receive most attention, especially on the market. However, hydraulic hybrids are an interesting alternative, especially for heavier vehicles due to higher power density which is beneficial if higher masses are moved. As a step towards a comprehensive design framework to compare several possible hydraulic hybrid architectures for a specified application and usage profile, the model of a series hydraulic hybrid vehicle was previously introduced and initially studied concerning component sizing for an exemplary light-duty vehicle in urban traffic. The vehicle is modeled in the Hopsan simulation tool. A comparably straight-forward engine management is used for the vehicle control; both pump and engine controls are based on the hydraulic accumulator’s state-of-charge. The model is developed further with respect to the accumulator component model. Based on that, the influence of several system and component parameters, such as maximum system pressure and engine characteristics, as well as controller parameters on the vehicle’s performance is analyzed. The goal is to allow for more understanding of the system’s characteristics to facilitate future optimization of the system.

scholarly journals Research on Outlier Detection Algorithm for Evaluation of Battery System Safety

2014 ◽  
Vol 6 ◽  
pp. 830402 ◽  
Author(s):  
Changhao Piao ◽  
Zhi Huang ◽  
Ling Su ◽  
Sheng Lu
Keyword(s):  
Outlier Detection ◽  
Data Stream ◽  
Concept Drift ◽  
Detection Algorithm ◽  
High Dimensional ◽  
Small Scale ◽  
Data Sets ◽  
Angle Distribution ◽  
System Safety ◽  
Battery System

Battery system is the key part of the electric vehicle. To realize outlier detection in the running process of battery system effectively, a new high-dimensional data stream outlier detection algorithm (DSOD) based on angle distribution is proposed. First, in order to improve the algorithm stability in high-dimensional space, the method of angle distribution-based outlier detection algorithm is employed. Second, to reduce the computational complexity, a small-scale calculation set of data stream is established, which is composed of normal set and border set. For the purpose of solving the problem of concept drift, an update mechanism for the normal set and border set is developed in this paper. By this way, these hidden abnormal points will be rapidly detected. The experimental results on real data sets and battery system simulation data sets demonstrate that DSOD is more efficient than Simple variance of angles (Simple VOA) and angle-based outlier detection (ABOD) and is very suitable for the evaluation of battery system safety.

scholarly journals Testing of a 3 MW High Speed Generator and Turbine Drive for a Hybrid Vehicle Propulsion System

2008 ◽  
Author(s):  
Robert F. Thelen ◽  
John D. Herbst ◽  
Doug Wardell ◽  
Brian T. Murphy
Keyword(s):  
Power Generation ◽  
High Speed ◽  
Static Load ◽  
Hybrid Vehicle ◽  
Propulsion System ◽  
Drive System ◽  
Prime Mover ◽  
Vehicle Propulsion ◽  
The Alps ◽  
Turbine Drive

The need for increased design flexibility and reduced weight and volume for electric power generation infrastructure has driven an increased interest in the use of high speed generators directly driven by gas turbine prime movers for both military and commercial power generation applications. This transition has been facilitated by the use of dc distribution and recent advances in the performance of solid state power conversion equipment, enabling designers to decouple the power generation frequency from typical 60 Hz ac loads. Operation of the generator at the turbine output speed eliminates the need for a speed reduction gearbox and can significantly increase the volumetric and gravimetric power density of the power generation system. This is particularly true for turbines in the 3 to 10 MW power range which typically operate with power turbine speeds of 7,000 to 16,000 rpm. The University of Texas at Austin, Center for Electromechanics (UT-CEM) is currently developing a 3 MW high speed generator and turbine drive system for a hybrid vehicle propulsion system as a part of the Federal Railroad Administration’s Advanced Locomotive Propulsion System (ALPS) Program. The ALPS system consists of a 3 MW turbine/alternator prime mover coupled with a 480 MJ, 2 MW flywheel energy storage system. Although designed as the prime mover for a high speed passenger locomotive, the compact turbine/alternator package is well suited for use in marine applications as an auxiliary turbine generator set or as the primary propulsion system for smaller vessels. The ALPS 3 MW high speed generator and turbine drive system were originally presented at the ASME Turbo Expo 2005 [1]. This follow-on paper presents the results of mechanical spin testing and No-Load electrical testing of the high speed generator and the Static Load testing of the generator and turbine drive system at NAVSEA (Philadelphia, PA) with a fixed resistive load. The generator has been tested to a 1.5 MW power level in the Static Load procedures and is being prepared for the final test phase to include dynamic power exchange with the flywheel.

Sign in / Sign up

Export Citation Format

Share Document