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A hybrid balancing approach that combines active and passive balancing is presented for a modular battery management system (BMS) in electric-drive vehicles. The hybrid system combines advantages of module-level active balancing with cost-effectiveness of cell-level passive balancing. A module consists of a number of cells connected in series, with cell-level passive balancing performed within a module,...
In this research, an intelligent lithium-ion battery-charging management system is proposed. The system integrates the battery monitoring and balance platform (BMBP) and charging station. According to the battery information of BMBP and the user needs, a proposed dual charging method (DCM) is used to control the charging voltage or current of charging station. The DCM contains the rapid and the smart...
This paper introduces the Microgrid Energy Manager (MEM), a plug-and-play platform for microgrid management. MEM is an end-to-end solution for monitoring, control, and management of AC, DC, and hybrid microgrids. We introduce the application of MEM for low voltage DC microgrids. Under the umbrella of MEM, a key component is the homegrid, which is managed locally by the Homegrid Energy Manager (HEM)...
Batteries have been generally adopted as energy storage component at distribution automation terminal, however bad operating environment have a great impact on the performance and service life, which is very difficult for operation and maintenance of batteries. Online monitoring and state diagnosis technology is developed, through acquisition battery real time voltage, current and temperature, use...
Microgrids are generally comprised of a number of Distributed Energy Resources (DERs) which may be renewable or non-renewable sources. Due to the intermittent nature of wind and solar resources, batteries are commonly used to ensure power quality and reliability. A central Energy Management System (EMS) is necessary to coordinate operation for the most economical utilization of all microgrid resources...
Virtual power plants can participate in energy markets. This paper presents the modeling approach used in the current research project SWARM for simulating the frequency containment reserve (FCR) power provision with a virtual mass storage. It participates in the German FCR market since July 2015 and is composed of battery energy storage systems (ESSs), which are in fact installed in households with...
By comparing difference battery management system (BMS), it comes to the conclusion that different BMS only has difference in communication data handle method and interface. To save the BMS design time, reduce the designer development workload, lead the BMS production satisfied market requirement quickly, this paper proposed flexible BMS design method. In the hardware design, this paper suggests module...
The growing interest in energy efficient Smart Grids is driving changes in the monitoring, designing and scheduling of loads. The proposed system uses the Hierarchical Household Load scheduling algorithm for micro Smart Grids to maximize the utilization rate of the Renewable energy resources connected to the system and Non-Intrusive Load monitoring(NILM) is essential to obtain specific power consumption...
This paper presents a battery module capacity monitoring system with a high voltage (HV) current sensor and a calibrated current estimation approach (CCEA) method. Battery modules usually are utilized to generate HV and large currents to drive motors of electric vehicle (EV). The battery modules are controlled and monitored by a system to protect the modules from possible hazards, e.g., battery management...
An accurate assessment of the temperature distribution on the surface of the battery can be instrumental in prediction of the health and remaining lifetime in the battery/battery storage unit. Close monitoring of operational conditions and health can lead to significant saving in the overall cost and reliability of the targeted application. In this paper a new method for estimation of an effective...
Significant energy consumption by buildings from utility grid has made researchers revisit existing Building Energy Management Systems (BEMS). Most of the developing countries have taken a green initiative of Net Zero Energy Buildings (NZEB) to reduce carbon foot print and fast depletion of conventional energy sources. Though the integration of solar and wind based systems to grid is successful in...
Most significant Balance of System (BOS) unit for monitoring health of a Photovoltaic (PV) system is the power Conditioner unit. Here, authors propose incorporation of an additional controller unit for monitoring all possible states of the Battery-bank leading to an enhanced energy security mechanism for small decentralized PV applications.
The paper deals with internal communication system in experimental fully electric airplane VUT 051 RAY which is controlling the whole drivetrain system. The complex drivetrain system consist of battery blocks, main computer, control system of the traction inverter, control and monitoring panel, several simple control and monitoring devices placed on pilot board and finally control system of fast charger...
This paper presents an all-digital battery capacity monitor using calibrated current estimation approach (CCEA). The circuit implementation for state of charge (SOC) and state of health (SOH) estimation methods is also revealed as well. The capacity of the battery is highly correlated with different discharging currents. Due to the variation of the capacity, the accuracy of the SOC and SOH estimated...
As a vital part of the battery employed systems, battery management system (BMS) must correctly estimate values descriptive of the battery's present operating condition. Without a doubt, state of charge (SOC) is a key battery state for BMS to estimate. This paper carefully analyzes the operating performance of VRLA battery through a large number of experimental tests; a statistical parameter identification...
A special round robin (RR) algorithm has been developed to equalize nickel metal hydride (NiMH) battery packs using a new selective equalizer. This algorithm detects batteries either at a very low state of charge (SOC) or at an extremely high SOC. In this system, a set of electromechanical relays are connected in a matrix to route boost current to the weaker batteries. The relay switching is controlled...
With the oil crisis in the early 1970s an intensive development of electric vehicles, i.e. passenger cars, delivery vans, and buses was initiated. Already in an early stage of the demonstration phase it became quite clear that the lead-acid battery, more precisely the battery pack, requires more attention than can be provided by simple meters for current, voltage, and ampere-hours. This led to the...
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