EPE Association: EPE 2001 - Topic 09c: Battery Charger, Battery Management, Test Bench

EPE 2001 - Topic 09c: Battery Charger, Battery Management, Test Bench
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2001 - Conference > EPE 2001 - Topic 09: POWER ELECTRONICS AND DRIVES IN THE AUTOMOTIVE INDUSTRY > EPE 2001 - Topic 09c: Battery Charger, Battery Management, Test Bench

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   A new charge-discharge equalization technique for battery cells
By J. Chatzakis; K. Kalaitzakis; N. C. Voulgaris; S. Manias [View]
[Download]

Abstract: The proposed technique a) provides both charge and discharge equalization and supports battery operation even with damaged cells b) ensures a uniform battery cell voltage fall, thus protecting cells from reverse polarization, and c) maximizes the energy delivered by the battery. The operation has been verified both by simulation and by experimental results.

   Battery management for electric vehicles in urban transport
By C. Carnevali; R. Genova; M. Mazzucchelli; A. Sasso [View]
[Download]

Abstract: In order to plan networks for electric buses it is necessary to merge the low transport capacity with their own logistic features. Observing the experiences in Italy it is possible to define some aspects of the problem, as the models of batteries and the battery charge management. The electric bus market situation presents a small offer in the number of manufacturers and in the type of vehicles. The real application range of this transport technology, which at the moment exists rather only in Italy, is still not clear. Public administrators consider electric busses like a good solution for many uses; on the other hand running companies have to find the optimum services for them. So it is necessary to plan good electric busses networks, able to merge the low transport capacity with their own logistic features (battery recharge and consequent service scheduling). It is moreover to highlight that the traction batteries technology has increased in Italy because of experiments on hybrid vehicles, even of big dimensions (12 meters).

   Comparison of charge equalization methods for traction batteries
By B. Hauck [View]
[Download]

Abstract: For nearly all battery systems a battery management is needed. Also, for an efficient use of the batteries a charge equalization which is part of the battery management is necessary. Some methods for charge equalization are compared with each other regarding the type of battery, the amount of electronic parts, the cables and connectors, and the accuracy of the charge equalization.

   High efficiency, low size converters to drive two wheel hub motors
By F. Gustin; A. Berthon [View]
[Download]

Abstract: This paper presents simulation and experimental results of a high efficiency converter for driving two wheel motors for electric vehicle. The converter is composed by one inverter with low voltage input (67v) and two cycloconverters with 400v output voltage. Each cycloconverter with 400v output voltage is directly placed near the wheel motor. This converter operates with soft switching techniques. It uses MOSFETs and IGBTs modules. Output power is more than 18kW and the chopping output frequency is about 40 kHz. Experimental and simulation results are proposed.

   Testbench for Electric Vehicle Drives used in fuelcell and battery pow
By B. Hauck [View]
[Download]

Abstract: A testbench for electric vehicle drives must be able to measure all parameters of these drives. For this the testbench must fulfill all requirements of the drive relative to power, speed and torque and also to thermal demands. The testbench at the Institute for Power Electronics and Electronics has the nominal values of a continuous power of 100 kW and a continuous torque of 238 Nm. The testbench motor runs up to a speed of 8,000 rpm. With gearboxes the speed or the torque can be increased. The testbench is equipped with a measurement system for d.c. power, three phase a.c. power, speed, torque and temperature. Also a special cooling and heating device for the testing of liquid cooled systems is available. With this device a preheating of the test object is possible.

   Torque linearity of high speed drives with wide field weakening range
By Dominik Hofmeyer [View]
[Download]

Abstract: Industrial torque controlled drives with enhanced torque linearity demands require the compensation of saturation, iron losses and rotor resistance estimation. The application of a very simple rotor time constant estimator is presented, which is advantageous related to the required hardware and implementation effort. Necessary conditions for correct estimation and their practical realisation are discussed. Practical results with several test bench machines are presented.

EPE 2001 - Topic 09c: Battery Charger, Battery Management, Test Bench
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2001 - Conference > EPE 2001 - Topic 09: POWER ELECTRONICS AND DRIVES IN THE AUTOMOTIVE INDUSTRY > EPE 2001 - Topic 09c: Battery Charger, Battery Management, Test Bench
	[return to parent folder]

	A new charge-discharge equalization technique for battery cells By J. Chatzakis; K. Kalaitzakis; N. C. Voulgaris; S. Manias	[View] [Download]
Abstract: The proposed technique a) provides both charge and discharge equalization and supports battery operation even with damaged cells b) ensures a uniform battery cell voltage fall, thus protecting cells from reverse polarization, and c) maximizes the energy delivered by the battery. The operation has been verified both by simulation and by experimental results.

	Battery management for electric vehicles in urban transport By C. Carnevali; R. Genova; M. Mazzucchelli; A. Sasso	[View] [Download]
Abstract: In order to plan networks for electric buses it is necessary to merge the low transport capacity with their own logistic features. Observing the experiences in Italy it is possible to define some aspects of the problem, as the models of batteries and the battery charge management. The electric bus market situation presents a small offer in the number of manufacturers and in the type of vehicles. The real application range of this transport technology, which at the moment exists rather only in Italy, is still not clear. Public administrators consider electric busses like a good solution for many uses; on the other hand running companies have to find the optimum services for them. So it is necessary to plan good electric busses networks, able to merge the low transport capacity with their own logistic features (battery recharge and consequent service scheduling). It is moreover to highlight that the traction batteries technology has increased in Italy because of experiments on hybrid vehicles, even of big dimensions (12 meters).

	Comparison of charge equalization methods for traction batteries By B. Hauck	[View] [Download]
Abstract: For nearly all battery systems a battery management is needed. Also, for an efficient use of the batteries a charge equalization which is part of the battery management is necessary. Some methods for charge equalization are compared with each other regarding the type of battery, the amount of electronic parts, the cables and connectors, and the accuracy of the charge equalization.

	High efficiency, low size converters to drive two wheel hub motors By F. Gustin; A. Berthon	[View] [Download]
Abstract: This paper presents simulation and experimental results of a high efficiency converter for driving two wheel motors for electric vehicle. The converter is composed by one inverter with low voltage input (67v) and two cycloconverters with 400v output voltage. Each cycloconverter with 400v output voltage is directly placed near the wheel motor. This converter operates with soft switching techniques. It uses MOSFETs and IGBTs modules. Output power is more than 18kW and the chopping output frequency is about 40 kHz. Experimental and simulation results are proposed.

	Testbench for Electric Vehicle Drives used in fuelcell and battery pow By B. Hauck	[View] [Download]
Abstract: A testbench for electric vehicle drives must be able to measure all parameters of these drives. For this the testbench must fulfill all requirements of the drive relative to power, speed and torque and also to thermal demands. The testbench at the Institute for Power Electronics and Electronics has the nominal values of a continuous power of 100 kW and a continuous torque of 238 Nm. The testbench motor runs up to a speed of 8,000 rpm. With gearboxes the speed or the torque can be increased. The testbench is equipped with a measurement system for d.c. power, three phase a.c. power, speed, torque and temperature. Also a special cooling and heating device for the testing of liquid cooled systems is available. With this device a preheating of the test object is possible.

	Torque linearity of high speed drives with wide field weakening range By Dominik Hofmeyer	[View] [Download]
Abstract: Industrial torque controlled drives with enhanced torque linearity demands require the compensation of saturation, iron losses and rotor resistance estimation. The application of a very simple rotor time constant estimator is presented, which is advantageous related to the required hardware and implementation effort. Necessary conditions for correct estimation and their practical realisation are discussed. Practical results with several test bench machines are presented.