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Inter-City Hybrid electric multiple unit (EMU) is very good choice for the cross line transportation between electrified and non-electrified railways. This paper proposes an on board energy storage system (ESS) for inter-city hybrid EMU to absorb braking energy and feed the train for the non-electrified lines. The system and its working modes are introduced, as well as the system modeling. Taking...
We propose an autonomous hybrid AC/DC microgrid system that uses a triple active bridge (TAB) converter as a power routing unit. A TAB converter that can independently control transmission power among three ports is suitable for constructing the microgrid system. We made a prototype TAB converter rated at 400 V, 20 kHz, and 10 kW and demonstrated that it can control the transmission power when the...
Cylindrical large formatted lithium-ion-battery “CH75” cells, battery pack “CH75-6” for stationary use, energy storage systems utilizing the CH75-6 to be applied to industrial applications and these characteristic points are described. In particular, energy storage systems for frequency-regulation applications and the cooling design of the battery panel are described.
This paper presents a review on the charging techniques of the batteries, particularly the lithium polymer ‘LiFePO4’. The lithium polymer entrusts some characteristics, which select it over the other types of batteries in usage. Basically, there exists one charging technique that is commonly used in the industries nowadays and it is known by constant-current constant-voltage technique (CC-CV). Nevertheless,...
Aiming at the problem of control inflexible and the control algorithm cannot take into account the quick adjustment and accurate control of hardware closed-loop feedback, PID or fuzzy control algorithm in battery testing system, we put forward fuzzy self-tuning PID control algorithm to control charging voltage of lithium ion battery, solving the problem of nonlinear time-varying charging system semaphore...
Technology development has been promoted aiming for an environment-friendly traction power supply system for railways. Among other things, a stationary energy storage system using lithium ion batteries for hybrid cars has been put into practical use since 2007. This device temporarily stores regenerative power generated from an train when it is stopped and the power is able to be applied for energy...
As energy storage system which should supply enough energy to the racecar, battery system shouldn't weight too much in order to build a lightweight, energy-saving and competitive car. The energy consumed by the motor can be known using power balance equation with racecar velocity information obtained in previous competition, and thus the number of cells is determined after battery selection. As for...
Bidirectional multi-port converters are particularly suitable for voltage balancing controllers of automotive lithium ion batteries. The converter topology proposed in this paper achieves a small number of components, high efficiency and low EMI due to the zero voltage switching. In comparison to other applications with multi-port converters the voltage balancing controller application requires a...
With obvious advantages compared to electrolytic power, super-capacitors will be acknowledged as a major component in future power systems. Super-capacitor can compensate shortage in power density of lithium ion battery. Due to the characteristics of capacitor parameters discretion, overcharge or undercharge of monomer capacitance usually occurs in the process of charge or discharge, greatly reducing...
In the switching process of microgrid from the state of being intergrated in external grid to the state of island operation, many devices such as energy storage devices, after sudden disturbance changes its running state, in some extreme cases, this change will overcome the device's affordability, requires the using of relay protection device to avoid further damage. The platform of the microgrid...
Because of the imbalances between the series-connected cells during the charging will greatly reduce the battery packs cycle life, charge equalization has become important consideration in the serially connected battery cells charging technology. To improve the unbalance of the series-connected battery packs and guarantee that the voltage of all battery cells is at the same level in the battery packs,...
Owing to the characteristics of nonlinear and time varying of different parameters in processing of storage battery charging, in order to realize rapid charge for lithium battery with high efficiency, the idea of charge system for lithium battery based on TMS320F2407 is proposed in this paper. Fuzzy control of recursive neural network based on immune genetic algorithm is adopted, to solve some problems...
This paper proposes the off-line fly back circuit structure together with the integrated control circuit, which can control the charge circuit and reduce the charge time for the flashlight of digital still cameras. The advantage of this control structure is better than the conventional RCC charge circuit. Moreover, the structure has a small volume, high efficiency and optimal control charge time....
Lithium ion battery is designed to perform as a portable 12Volt D.C power supply. This power supply was tested to recharge a parallel of lithium ion battery by using one single charge controller. This experiment aimed to prove the concept of solar photovoltaic to charge a lithium ion battery for water quality monitoring system. This type of system is considered a low voltage application. Charge controller...
Rapid developments in the lithium-ion battery technology in the last decade have made it the overwhelming choice over lead-acid batteries, especially for advanced vehicles like hybrid and electric vehicles. However, for the traditional starting-lighting-ignition (SLI) application, the lead-acid technology continues to be dominant due to its low costs, despite its shortcomings. This could change in...
To improve the safety and reliability of local ventilation of heading face in the coal-mine and prevent gas accumulation effectively, the paper develops a flameproof 660V- high power three-phase emergency power supply (EPS) for auxiliary fan in the mine. The paper illustrates the design and implementation of the battery system which is the core of the EPS, including the design of constitution of high-voltage...
For lithium-breed batteries, the fragility and sensitivity upon terminal voltage, high-temperature environment or too high current are all harmful. Consequently, versatile protecting circuits are requisites for lithium batteries. Furthermore, for high voltage applications, series-connected battery string is a normally adopted as the power source. In a lithium-battery string, every single battery unit...
This paper presents a cell balancing management for battery pack. It is used for each cell in battery pack to protect pack from damages such as overheating and overvoltage taken by the different performances between different cells, it manages individual cell with CC-CV charging strategy, shunts charge current smoothly to protect every cell preferably; in order to be suitable for different charge...
This paper presents a careful study related to a more efficient energy management between lithium battery (with rated voltage of 24V) and Ultracapacitors (UC) for Hybrid Electric Vehicle (HEV) applications. This association is due to the present trend in the field, knowing that the major drawback of the HEV is the autonomy problem. Thus, using the Hybrid energy source (such as UC + battery) and with...
Vehicle to grid (V2G) concept is becoming increasingly popular, but it essentially requires some form of a power interface between the electric vehicle (EV) and the grid. In contrast to wired power interfaces, a user-friendly and secure wireless interfaces with no physical contacts are preferable. This paper presents a V2G system that comprises of a plug-in hybrid vehicle, called Blue-Angel III, and...
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