Shenzhen Key Laboratory of Electrical Vehicle Powertrain Platform and Safety Technology

Shenzhen, China

Shenzhen Key Laboratory of Electrical Vehicle Powertrain Platform and Safety Technology

Shenzhen, China
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Zheng C.H.,CAS Shenzhen Institutes of Advanced Technology | Zheng C.H.,Shenzhen Key Laboratory of Electrical Vehicle Powertrain Platform and Safety Technology | Kim N.W.,Seoul National University | Park Y.I.,Seoul National University of Science and Technology | And 4 more authors.
International Journal of Hydrogen Energy | Year: 2013

In order to consider the effect of battery temperature on the total fuel consumption when a Pontryagin's Minimum Principle (PMP)-based power management strategy is applied to a fuel cell hybrid vehicle (FCHV), this paper designates the battery temperature as a second-state variable other than the battery state of charge (SOC) and defines a new costate for the battery temperature in the control problem. The PMP-based power management strategy is implemented in a computer simulation and the relationship among the final values of the two state variables and the total fuel consumption is illustrated based on the simulation results. This relationship is defined as an optimal surface in this research. Using the optimal surface, it can be concluded that considering the battery temperature effect in the PMP-based power management strategy improves the fuel economy of the FCHV. Potential fuel economy gains attributed to consideration of the battery temperature effect are also determined based on the optimal surfaces. Crown Copyright © 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.


Zhao L.,CAS Shenzhen Institutes of Advanced Technology | Zhao L.,Shenzhen Key Laboratory of Electrical Vehicle Powertrain Platform and Safety Technology | Xu G.,CAS Shenzhen Institutes of Advanced Technology | Xu G.,Shenzhen Key Laboratory of Electrical Vehicle Powertrain Platform and Safety Technology | And 7 more authors.
2013 IEEE International Conference on Information and Automation, ICIA 2013 | Year: 2013

As is known to all, an accurate on-line estimation of the battery capacity is important for forecasting the EV driving range. But because of the different driving environment and the property of the battery, it is hard to estimate the capacity of the battery pack. This paper presents an unscented Kalman filtering method to estimate the state of charge of LiFePO4 battery pack. Five comparison experiments with different open circuit voltage curves shows that the unscented Kalman filter has a better performance than extended kalman filter. © 2013 IEEE.


Liu B.,CAS Shenzhen Institutes of Advanced Technology | Liu B.,Shenzhen Key Laboratory of Electrical Vehicle Powertrain Platform and Safety Technology | Xu G.,CAS Shenzhen Institutes of Advanced Technology | Xu G.,Shenzhen Key Laboratory of Electrical Vehicle Powertrain Platform and Safety Technology | And 5 more authors.
Applied Mechanics and Materials | Year: 2013

According to the structural characteristics of the controller and micro-groove heat sink technique, a new cooling system was designed for high power control unit of electric vehicles. And an experimental comparison on the radiating effect of forced air cooling, micro capillary groove radiator and their combination was then carried out. The experimental results showed that when compared with air-cooling method, the higher the power is, the more significant the heat dissipation effect is. The air cooling unit alone cannot meet cooling requirements when the heating power reaches 30 watts, with temperature exceeding the allowable ceiling for power devices. The strong heat removal ability of micro capillary groove radiator has a better effect for diminishing local overheating of IGBT, and it's more applicable to cooling conditions of large heat flux. © (2013) Trans Tech Publications, Switzerland.


Zhou Y.,CAS Shenzhen Institutes of Advanced Technology | Zhou Y.,Shenzhen Key Laboratory of Electrical Vehicle Powertrain Platform and Safety Technology | Xu G.,CAS Shenzhen Institutes of Advanced Technology | Xu G.,Chinese University of Hong Kong | And 12 more authors.
2013 IEEE International Conference on Robotics and Biomimetics, ROBIO 2013 | Year: 2013

In this paper, the current roboticized technologies and intelligent technologies applied in electric vehicles have been discussed. Vehicle structure design and motion control such as anti-slid, four wheel steering methods are analyzed. Besides, the driving strategy, vehicle monitoring and human-machine interaction are reviewed in details. Particularly, a new design of vehicle structure with detachable module is presented with typical characteristics for future electric vehicles. © 2013 IEEE.


Zheng C.,CAS Shenzhen Institutes of Advanced Technology | Xu G.,Shenzhen Key Laboratory of Electrical Vehicle Powertrain Platform and Safety Technology | Zhou Y.,Chinese University of Hong Kong
2013 IEEE Energy Conversion Congress and Exposition, ECCE 2013 | Year: 2013

In order to consider the lifetime of fuel cell stacks when minimizing the fuel consumption in fuel cell hybrid vehicles (FCHV), a Pontryagin's Minimum Principle (PMP)-based power management strategy is proposed in this research. This strategy has the effect of prolonging the lifetime of fuel cell stacks. However, there is a tradeoff between the lifetime of the fuel cell stack and the fuel consumption when this strategy is applied to an FCHV. Verifying the positive economic influence of this strategy is necessary in order to demonstrate its effectiveness. In this research, the economic influence is analyzed and determined based on the fuel cell stack cost, the hydrogen cost, the fuel cell stack lifetime, and the lifetime prolonging impact on the fuel cell stack. Simulation results derived from the PMP-based power management strategy are also used to determine the economic influence. As a result, the positive economic influence of the PMP-based power management strategy is proved for both current and future FCHVs. © 2013 IEEE.


Liu Y.,CAS Shenzhen Institutes of Advanced Technology | Zhou Y.,CAS Shenzhen Institutes of Advanced Technology | Zhou Y.,Shenzhen Key Laboratory of Electrical Vehicle Powertrain Platform and Safety Technology | Xu G.,Shenzhen Key Laboratory of Electrical Vehicle Powertrain Platform and Safety Technology | Xu G.,Chinese University of Hong Kong
2012 IEEE International Conference on Robotics and Biomimetics, ROBIO 2012 - Conference Digest | Year: 2012

In this paper, an optimal compression ratio is discussed based on JPEG2000 baseline compression in RGB space. Human eyes are more sensitive to green color than to red and blue colors. Hence, optimal compression ratios should be adopted during quantization. A novel mathematical model for co-relationship of three color components in RGB is developed. VDR (voyage data recorder) test methods combined with information entropy are used to evaluate the optimal compression ratio, considering the human eye characteristics. Simulation results have proven the effectiveness of the proposed method. © 2012 IEEE.


Zheng C.,CAS Shenzhen Institutes of Advanced Technology | Zheng C.,Shenzhen Key Laboratory of Electrical Vehicle Powertrain Platform and Safety Technology | Cha S.W.,Seoul National University | Park Y.-I.,Seoul National University of Science and Technology | And 3 more authors.
International Journal of Precision Engineering and Manufacturing | Year: 2013

In order to develop more practical vehicle controllers for hybrid vehicles, performance limitations of hybrid powertrain components need to be considered when constructing power management strategies. This paper introduces a Pontryagin's Minimum Principle (PMP)-based power management strategy for fuel cell hybrid vehicles which considers not only the fuel consumption minimization but also the requirement on limiting battery state of charge (SOC) usage or on prolonging fuel cell system lifetime. The battery SOC constraint problem is solved by introducing a new cost function to the PMP-based optimal control problem. The limitation requirements on the battery SOC are satisfied by this solution. In order to take into account the lifetime of a fuel cell system, another cost function is defined and added to the PMP-based optimal control problem. Simulation results show that the lifetime of the fuel cell system can be prolonged by this method. Global optimality is discussed for the two extended cases. The proposed PMP-based power management strategy saves much time compared to dynamic programming (DP) approach while it guarantees global optimality under reasonable battery assumptions. © 2013 Korean Society for Precision Engineering and Springer-Verlag Berlin Heidelberg.


Zhou Y.,CAS Shenzhen Institutes of Advanced Technology | Zhou Y.,Shenzhen Key Laboratory of Electrical Vehicle Powertrain Platform and Safety Technology | Krundel L.,Loughborough University | Mulvaney D.,Loughborough University | And 3 more authors.
Proceedings of the 2013 IEEE 8th Conference on Industrial Electronics and Applications, ICIEA 2013 | Year: 2013

The research field of artificial intelligence (AI) has long abode by the top-down problem solving strategy. Yet, we have adopted bottom-up design thinking to solve its hard problems. To tackle end-to-end AI-hard problems, a highly self-adaptive control system-on-chip (SoC) has been developed to self-learn its internal and external resources with the aid of sets of sensors and actuators. Inspired by biological cell learning theory, different approaches of modelling techniques have been derived together with machine learning (ML) methods to the embedded control systems so as to perform different tasks. This paper lays out our developments of the above. © 2013 IEEE.


Chen Y.,Chinese University of Hong Kong | Sun Y.,Chinese University of Hong Kong | Ding N.,Chinese University of Hong Kong | Chung W.K.,Chinese University of Hong Kong | And 7 more authors.
2012 IEEE/SICE International Symposium on System Integration, SII 2012 | Year: 2012

With the increase of vehicle amount all over the world, vehicle safety has become a tremendous problem. Chained accidents, which result in numerous losses of lives and properties, happen due to the fact that the following drivers are unaware of the accident occurrence. In this paper, a real-time vehicle safety system is proposed. A prototype test platform, consisting of collision detection and classification module, vehicle-to-vehicle (V2V) communication module and graphic user interface (GUI) module, has been built for validating the performance. 12 sensors are installed in collision detection module. Threshold under rule based strategy is adopted for collision classification. We also propose a GPS based AODV (GBAODV) protocol for V2V communication application. One full version and eight sets of portable version subsystems are implemented for road test. The experiment results validate the performance of this safety vehicle system. © 2012 IEEE.


Lin G.,CAS Shenzhen Institutes of Advanced Technology | Lin G.,Shenzhen Key Laboratory of Electrical Vehicle Powertrain Platform and Safety Technology | Xu G.,CAS Shenzhen Institutes of Advanced Technology | Xu G.,Shenzhen Key Laboratory of Electrical Vehicle Powertrain Platform and Safety Technology | And 5 more authors.
Applied Mechanics and Materials | Year: 2013

Electronics cooling research has been largely focused on high heat flux removal from computer chips in the recent years. However, the equally important field of high-power electronic devices has been experiencing a major paradigm shift from air cooling to liquid cooling over the last decade. For example, multiple insulated-gate bipolar transistors (IGBT) used in a power drive for motor used in electric vehicle. Motor drive system plays an important impact on electric vehicle' performance, so thermal design should be considered in the early stages during the motor controller design and layout of the devices. In this paper, a new type of water-cooled cold plate for motor controller was designed, and its cooling ability was analyzed by using different material base on Fluent. The results provide reference on the optimization design of cold plate. © (2013) Trans Tech Publications, Switzerland.

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