Current redistribution on hybrid power system combining supercapacitors with lithium-ion batteries for application of the electric drill

This paper aims at presenting an energy management strategy (EMS) based upon optimal control theory for a battery–supercapacitor hybrid power system. The hybrid power system consists of a lithium-ion battery and a supercapacitor with associated bidirectional DC/DC converters. The proposed EMS aims at computing adaptive gains using the salp swarm algorithm and load following control technique to assign the power reference for both the supercapacitor and the battery while achieving optimal performance and stable voltage. The DC/DC converter model is derived utilizing the first-principles method and computes the required gains to achieve the desired power. The fact that the developed algorithm takes disturbances into account increases the power elements’ life expectancies and supplies the power system with the required power.

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White Paper for U.S. Army Rapid Equipping Force: Waste Heat Recovery with Thermoelectric and Lithium-Ion Hybrid Power System

10.2172/926004 ◽

2007 ◽

Author(s):

J Farmer

Keyword(s):

Power System ◽

Heat Recovery ◽

Waste Heat Recovery ◽

Waste Heat ◽

Lithium Ion ◽

White Paper ◽

Hybrid Power System ◽

Hybrid Power

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Design and Simulation of a Hybrid Power System for a Bus Start-Stop Working Condition

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.448-453.3101 ◽

2013 ◽

Vol 448-453 ◽

pp. 3101-3106

Author(s):

Qian Wang ◽

Jian Zhang ◽

Wei Liu ◽

Yu Wan Lou ◽

Xiao Hua Xie ◽

...

Keyword(s):

Power System ◽

Pulse Discharge ◽

Lithium Ion ◽

Cycle Life ◽

High Rate ◽

Lead Acid Battery ◽

Control Cost ◽

Hybrid Power System ◽

Hybrid Power ◽

Lead Acid

A promising applied technology on hybrid power system for electric vehicle was proposed in this paper. Considring the actual bus working conditions, a testing system of multi-stage pulse discharge was designed. The separated LiFePO4series, lead-acid battery and the paralleled battery pack, constituted by the lithium battery and lead-acid battery with equal capacity, were tested to compare the voltage and power characteristics, as well as temperature rise. The results indicate that the lithium-ion batteries provide momentary high currant at high rate pulse discharge while keeping the lead-acid stay at a higher state of charge and improving its cycle life. During the intermittent, spontaneous capacity redistribution is achieved in the paralleled system, which helps to relieve the potential polarization and avoid the over-discharge of lithium-ion battery. Systematic analysis of the paralleled system demonstrats that it is benefitial to the circuit control, cost, cycle life and safety.

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A Small Hybrid Power System of Photovoltaic Cell and Sodium Borohydride Hydrolysis-Based Fuel Cell

Micromachines ◽

10.3390/mi12030278 ◽

2021 ◽

Vol 12 (3) ◽

pp. 278

Author(s):

Mingxue Li ◽

Huichao Deng ◽

Yufeng Zhang ◽

Chenjun Hou

Keyword(s):

Fuel Cell ◽

Power System ◽

Power Management ◽

Lithium Ion ◽

Photovoltaic Cell ◽

Power Source ◽

Cell System ◽

Fuel Cell System ◽

Hybrid Power System ◽

Hybrid Power

Although the hybrid power system that combines a photovoltaic cell and a lithium-ion battery is increasingly mature and practical, long-lifetime auxiliary power will be still needed in severe weather conditions. A small-volume hydrogen–oxygen fuel cell system based on the hydrolysis of NaBH4 is designed. The fuel cell system contains a tiny hydrogen generator, a hydrogen cleaner, and a small fuel cell stack consisting of three units in series. The relationship between the amount of catalyst and output performance is discussed. The long-time discharging results indicate that the fuel cell system has high power capacity. The compact design allows the fuel cell system to integrate the structure with a photovoltaic cell and lithium-ion cell and forms a hybrid power system with a small package. The power management circuit for these power sources without logic devices is designed and tested. The control strategy selects the photovoltaic–battery subsystem as the primary power source, and the fuel cell subsystem works as the backup power source to handle the circumstance when the energy stored in the battery is exhausted. The test results show that the power management system could switch the power supply automatically and timely under various emergency conditions, and the output voltage remains stable all the time.

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Analysis of a Supercapacitor/Battery Hybrid Power System for a Bulk Carrier

Applied Sciences ◽

10.3390/app9081547 ◽

2019 ◽

Vol 9 (8) ◽

pp. 1547 ◽

Cited By ~ 1

Author(s):

Kyunghwa Kim ◽

Juwan An ◽

Kido Park ◽

Gilltae Roh ◽

Kangwoo Chun

Keyword(s):

Power System ◽

Lithium Ion ◽

Handling Time ◽

Bulk Carrier ◽

Hybrid Power System ◽

Cargo Handling ◽

Hybrid Power ◽

System A ◽

Bulk Carriers ◽

Reduce Emissions

Concerns about harmful exhaust emissions from ships have been an issue. Specifically, the emissions at ports are the most serious. This paper introduces a hybrid power system that combines conventional diesel generators with two different energy storage systems (ESSs) (lithium-ion batteries (LIB) and supercapacitors (SC)) focused on port operations of ships. To verify the proposed system, a bulk carrier with four deck cranes is selected as a target ship, and each size (capacity) of LIB and SC is determined based on assumed power demands. The determined sizes are proven to be sufficient for a target ship through simulation results. Lastly, the proposed system is compared to a conventional one in terms of the environmental and economic aspects. The results show that the proposed system can reduce emissions (CO2, SOX, and NOx) substantially and has a short payback period, particularly for ships that have a long cargo handling time or visit many ports with a short-term sailing time. Therefore, the proposed system could be an eco-friendly and economical solution for bulk carriers for emission problems at ports.

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Optimal Adaptive Gain LQR-based Energy Management Strategy for Battery-Supercapacitor Hybrid Power System

10.20944/preprints202101.0371.v1 ◽

2021 ◽

Author(s):

Seydali Ferahtia ◽

Ali Djerioui ◽

Tedjani Mesbahi ◽

Azeddine Houari ◽

Samir Zeghlache ◽

...

Keyword(s):

Power System ◽

Energy Management ◽

Management Strategy ◽

Lithium Ion ◽

Control Technique ◽

Energy Management Strategy ◽

Hybrid Power System ◽

Hybrid Power ◽

Load Following ◽

Stable Voltage

This paper aims at presenting an energy management strategy (EMS) based upon optimal control theory for a battery-supercapacitor hybrid power system. The hybrid power system consists of a Lithium-ion battery and a supercapacitor with associated bidirectional DC/DC converters. The proposed EMS aims at computing adaptive gains using salp swarm algorithm and load following control technique to assign the power reference for both the supercapacitor and the battery while achieving optimal performance and stable voltage. The DC-DC converter model is derived utilizing the first-principles method and compute the required gains to achieve the desired power. The fact that the developed algorithm takes disturbances into account increases the power ele-ments’ life expectancies and supplies the power system with the required power

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Research on the Responses of the Hybrid Power System based on Energy Profiles

Scientific Journal of Polish Naval Academy ◽

10.2478/sjpna-2019-0002 ◽

2019 ◽

Vol 216 (1) ◽

pp. 17-29

Author(s):

Arkadiusz Adamczyk

Keyword(s):

Power System ◽

Alternative Energy ◽

Lithium Ion ◽

High Energy ◽

High Energy Density ◽

Hybrid Power System ◽

Hybrid Power ◽

Alternative Energy Sources ◽

Energy Profiles ◽

Very High Energy

Abstract The article contains the chosen results of research on the use of energy profiles controlling the operation of a group of devices powered by a hybrid power source. The concept of using alternative energy sources allows to reduce the total weight of the power system and model its behavior during work. Modern fuel cells are characterized with a very high energy density to mass ratio [Wh/kg], and the additional cooperation of supercapacitors and lithium-ion batteries supporting their operation ensures continuous operation and the required dynamics response while maintaining a low mass of the power supply system. The author presented the general configuration of the layout model, as well as the results of tests of individual elements included in the physical implementation of the hybrid power system.

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