scholarly journals Performance Evaluation of Duty Cycle Balancing in Power Electronics Enhanced Battery Packs Compared to Conventional Energy Redistribution Balancing

2018 ◽  
Vol 33 (11) ◽  
pp. 9142-9153 ◽  
Author(s):  
Efstratios Chatzinikolaou ◽  
Daniel J. Rogers
Keyword(s):  
Performance Evaluation ◽  
Power Electronics ◽  
Duty Cycle ◽  
Energy Redistribution ◽  
Battery Packs

scholarly journals A Non-Dissipative Equalizer with Fast Energy Transfer Based on Adaptive Balancing Current Control

Electronics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1990
Author(s):  
Shun-Chung Wang ◽  
Chun-Yu Liu ◽  
Yi-Hua Liu
Keyword(s):  
Energy Transfer ◽  
Duty Cycle ◽  
Nonlinear Behavior ◽  
Lithium Ion ◽  
Current Control ◽  
Test Results ◽  
Voltage Difference ◽  
Battery Packs ◽  
Circuit Component ◽  
Transfer Stage

In this study, an active inductive equalizer with fast energy transfer based on adaptive balancing current control is proposed to rapidly equilibrate lithium-ion battery packs. A multiphase structure of equalizer formed by many specific parallel converter legs (PCLs) with bidirectional energy conversion serves as the power transfer stage to make the charge shuttle back and forth between the cell and sub-pack or sub-pack and sub-pack more flexible and efficient. This article focuses on dealing with the problem of slow balancing rate, which inherently arises from the reduction of balancing current as the voltage difference between the cells or sub-packs decreases, especially in the later period of equalization. An adaptive varied-duty-cycle (AVDC) algorithm is put forward here to accelerate the balance process. The devised method has taken the battery nonlinear behavior and the nonideality of circuit component into consideration and can adaptively modulate the duty cycle with the change of voltage differences to maintain balancing current nearly constant in the whole equilibrating procedure. Test results derived from simulations and experiments are provided to demonstrate the validity and effectiveness of the equalizer prototype constructed. Comparing with the conventional fixed duty cycle (FDC) method, the improvements of 68.3% and 8.3% in terms of balance time and efficiency have been achieved.

Performance evaluation of a wavy-fin heat sink for power electronics

2007 ◽  
Vol 27 (5-6) ◽  
pp. 969-975 ◽  
Author(s):  
Marco Lorenzini ◽  
Giampietro Fabbri ◽  
Sandro Salvigni
Keyword(s):  
Performance Evaluation ◽  
Power Electronics ◽  
Heat Sink

scholarly journals Performance Evaluation Of 802.11P Vanets With Different Duty Cycles

2021 ◽  
Author(s):  
Rishabh Kumar
Keyword(s):  
Performance Evaluation ◽  
Duty Cycle ◽  
Multimedia Applications ◽  
The Road ◽  
Duty Cycles ◽  
Large Numbers ◽  
The World ◽  
On The Road ◽  
Delay Tolerant ◽  
Service Channels

With the improvement in technology, the number of vehicles on the roads has increased tremendously over the last decade. As large numbers of vehicles are on the road it has become almost a necessity to improve the driving conditions, provide all the facilities and to make sure that driving is safe for drivers around the world. To utilize this information the vehicle has to alternately switch between control (CCH) and service channels (SCH) effectively. So, in our work we evaluate the performance of vehicles on control and service channels with different duty cycle such that no critical message is missed and multimedia applications can be used concurrently. For this purpose we developed 802.11p simulator and the experiments proved that CCH should use duty cycle of 0.6 as delay tolerant data has to be transmitted over it and SCH should work on 0.3 which is delay insensitive, but generates revenue for the industry by using different multimedia applications as requested by the user.

scholarly journals Duty-cycle-division-multiplexing: Bit error rate estimation and performance evaluation

2009 ◽  
Vol 16 (4) ◽  
pp. 422-425 ◽  
Author(s):  
Ghafour Amouzad Mahdiraji ◽  
Mohamad Khazani Abdullah ◽  
Makhfudzah Mokhtar ◽  
Amin Malekmohammadi ◽  
Ahmad Fauzi Abas
Keyword(s):  
Performance Evaluation ◽  
Bit Error Rate ◽  
Error Rate ◽  
Duty Cycle ◽  
Rate Estimation ◽  
And Performance

Smart Ultrasonic Welding – A Versatile Interconnection Technology for Power Electronics Packaging

2021 ◽  
Vol 2021 (HiTEC) ◽  
pp. 000112-000117
Author(s):  
Matthias Hunstig ◽  
Sebastian Holtkämper ◽  
Lars Helmich ◽  
Michael Brökelmann
Keyword(s):  
Process Control ◽  
Power Electronics ◽  
New Technology ◽  
Ultrasonic Welding ◽  
Wire Bonding ◽  
Ultrasonic Power ◽  
Advanced Process Control ◽  
Welding Equipment ◽  
Battery Packs ◽  
Ultrasound System

Abstract Ultrasonic welding is a common and indispensable technology in the packaging of power electronics. Typical applications are terminals and power contacts, e.g. in motor drive or inverter modules, as well as busbar connections. The process control requirements for welding power electronics connectors or bus bars, e.g. on batteries, are increasingly overlapping with requirements typical for heavy wire bonding. Smart ultrasonic welding is a new technology combining the force and ultrasonic power of conventional ultrasonic welding equipment with the flexibility, precision, speed and advanced process control features of wire bonding machines. This contribution discusses the characteristics of smart welding equipment and presents process results for two different smart welding applications. On the low power end, smart welding and wire bonding are compared in the production of cylindrical cell battery packs, using a 100 W ultrasound system and aluminium connectors. Towards the high power end, 3 × 1.2 mm2 copper leads are welded to DBC with a contact area of 3 × 3 mm2, using a 1.5 kW ultrasound system. Both applications demonstrate advantages of smart welding over conventional ultrasonic welding.

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