수배전반용 배터리 충전기의 최적 설계 방안에 관한 연구

이동윤(Dong-Yun Lee) 한국산업기술융합학회(구. 산업기술교육훈련학회) 2023 산업기술연구논문지 (JITR) Vol.28 No.4

본 논문은 정전 시 수배전반에 전원을 공급하기 위한 정류기반용 배터리 충전기의 문제점을 해결하기 위해 고주파PWM 전력변환장치를 이용한 수배전반용 배터리 충전기의 최적설계를 위한 방안을 제안하고자 한다. 제안된 수배 전반용 배터리 충전기는 배터리 용량에 따라 충전시간과 전류를 검토하여 설계를 수행함으로써 충전기 시스템 제작시 충전기 시스템의 원가 절감과 운영 시 배터리 충전기의 도통손실로 인한 충전효율을 향상시키기 위한 배터리 충전 기의 최적 설계 방안을 제시하는데 그 목적이 있다. 또한, 제안된 수배전반용 배터리 충전기 시스템은 고주파 전력변환장치를 활용하여 충전기 시스템의 크기 및 부피를 기존의 정류기반용 배터리 충전기에 비해 최소화하는 특징을가지고 있다. 뿐만 아니라, 제안된 수배전반용 배터리 충전기 시스템은 시스템의 부피를 최소화하여 수배전반 내의협소한 공간에서도 설치가 가능하고, 차후 시설 유지 보수 시 작업이 용이한 특징을 가지고 있다. 제안된 수배전반용 배터리 충전기의 최적 설계 방안에 대한 그 타당성을 시뮬레이션을 통하여 검증하고자 한다. This paper proposes a method for the optimal design of a battery charger for a distribution system using a high-frequency PWM power converter to solve the problems of the conventional rectifier-based battery charger for supplying power to the distribution system during a power outage. The proposed battery charger for the distribution system is designed by reviewing the charging time and current according to the battery capacity, thereby reducing the cost of the battery charger system during manufacture and improving charging efficiency owing to the conduction loss of the battery charger during operation. In addition, the proposed battery charger system for the distribution system utilizes a high-frequency power conversion device to minimize the size and volume of the charger system compared with the conventional rectifier-based battery chargers. Therefore, in this paper, we propose an optimal design method for the proposed battery charger for the distribution system and verify its feasibility through simulation results.

Development of an Intelligent Charger with a Battery Diagnosis Function Using Online Impedance Spectroscopy

Thanh-Tuan Nguyen,Van-Tuan Doan,Geun-Hong Lee,Hyung-Won Kim,Woojin Choi,Dae-Wook Kim 전력전자학회 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.5

Battery diagnosis is vital to battery-based applications because it ensures system reliability by avoiding battery failure. This paper presents a novel intelligent battery charger with an online diagnosis function to circumvent interruptions in system operation. The charger operates in normal charging and diagnosing modes. The diagnosis function is performed with the impedance spectroscopy technique, which is achieved by injecting a sinusoidal voltage excitation signal to the battery terminals without the need for additional hardware. The impedance spectrum of the battery is calculated based on voltage excitation and current response with the aid of an embedded digital lock in amplifier in a digital signal processor. The measured impedance data are utilized in the application of the complex nonlinear least squares method to extract the battery parameters of the equivalent circuit. These parameters are then compared with the reference values to reach a diagnosis. A prototype of the proposed charger is applied to four valve-regulated lead–acid batteries to measure AC impedance. The results are discussed.

5kW 배터리 충전기용 양방향 3상 인터리브드 DC-DC 컨버터 설계 및 실험

이우종,엄주경,한병문,차한주 전력전자학회 2011 전력전자학회 논문지 Vol.16 No.3

This paper proposes a design and experiment of three phase interleaved dc-dc converter for 5kW battery charger. The charger consists of a three-phase interleaved dc-dc converter, which interfaces batteries and DC link, and a grid connected inverter. Lead-acid battery is modeled in a simple R-C model by matlab. Parameters of the battery are estimated based on step current discharging test. The battery is connected to three-phase interleaved DC-DC converter in order to reduce the ripple current to the battery and so, increase the lifetime of battery. Controller for charging and discharging mode is designed and tested in a 5kW charger prototype. 본 논문은 5kW 배터리 충전기용 3상 인터리브드 DC-DC 컨버터 설계 및 실험에 대하여 서술하였으며, 배터리 시스템은 풍력 시스템의 안정화를 위해 사용한다. 배터리 충전기는 배터리, 3상 인터리브드 양방향 DC-DC 컨버터, 직류단, 계통연계형 인버터로 구성된다. 납축전지는 matlab으로 간단한 R-C모델링 하였으며, 스텝 전류 방전 실험에 따라 배터리 파라미터를 구하였다. 3상 인터리브드 DC-DC 컨버터를 이용해 배터리의 전류 리플을 감소시켰으며, 5kW 배터리 충전기를 제작하여 충·방전모드 제어기를 설계하고 실험하였다.

Reactive Power Operation Analysis of a Single-Phase EV/PHEV Bidirectional Battery Charger

Mithat C. Kisacikoglu,Burak Ozpineci,Leon M. Tolbert 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5

More battery powered electric vehicles (EVs) and plug-in hybrid electric vehicles (PHEVs) will be introduced to the market in 2011 and beyond. PHEVs/EVs potentially have the capability to fulfill the energy storage needs of the electric grid by supplying ancillary services such as reactive power compensation, voltage regulation, and peak shaving since they carry an on-board battery charger. However, to allow bidirectional power transfer, the PHEV battery charger should be designed to manage such reactive power capability. This study shows how bidirectional four-quadrant operation affects the design stage of a conventional unidirectional charger and the operation of the battery pack. Mainly, the subjects that are discussed are the following: required topology updates, dc link capacitor (voltage and current), ac inductor (current), rectifier (power loss), and battery pack (voltage and current).

DSP로 제어되는 동기형 배터리 충방전기

지정우(Jeong Woo Jee),최산(San Choi),차태민(Tae Min Cha),정규범(Gyu Bum Joung) 한국정보기술학회 2009 Proceedings of KIIT Conference Vol.2009 No.-

본 논문에서는 배터리 충방전기에 적합한 고효율의 동기형 배터리 충방전기를 제안하였다. 제안된 배터리 충방전기는 소형화를 위하여 배터리 충방전기의 전력회로를 한 개로 구성하였다. 또한, 배터리 충방전기의 제어는 DSP를 사용하여 배터리 충전모드와 배터리 방전모드를 스스로 판별하여 제어할 수 있는 알고리즘을 구현 하였다. 실험결과 배터리 충방전기는 기존의 하드 스위칭 방식의 컨버터에 비하여 높은 효율로 동작됨을 확인하였다. In this paper, a synchronous battery charger/discharger, which has high efficiency, was proposed, designed, implemented, and experimented. To minimize size and weight, the proposed battery charger/discharger has combined by only one power electornics circuit with two switches. The control mode of the battery charger/discharger was determined by DSP. Charging mode and discharging mode of the battery was automatically controled and determined by DSP. The efficiency of the proposed battery charger/discharger was about 96% at charging mode and 94% at discharging mode.

Intelligent Charger with Online Battery Diagnosis Function

Van-Tuan Doan,Van-Binh Vu,Hai-Nam Vu,Duc-Hung Tran,Woojin Choi 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6

In the battery based applications, the performance of the system highly depends on the reliability of the battery. However, it is difficult to obtain the accurate information about the state-of-health (SOH) of battery during its operation. In this paper a 3kw battery charger with online battery diagnosis function which can estimate the SOH of the battery by using online impedance spectroscopy technique is introduced. For the charger, a phase shift full bridge converter with synchronous rectification has been adopted to implement constant current/constant voltage charge and diagnosis functions. The electrochemical impedance spectroscopy (EIS) is performed after the charge to obtain the information about the internal impedance of the battery module, hence the SOH can be estimated online by observing the impedance variation of the battery over time. All the design procedure of the proposed charger is detailed and the feasibility of the system is verified by the experimental results.

폐납축전지 재활용을 위한 펄스전류에 의한 전압조정기와 펄스충전기의 개발

申春植(Choon-Shik Shin),安永株(Young-Joo An),金?完(Dong-Wan Kim) 대한전기학회 2007 전기학회논문지 P Vol.56 No.2

In this study, the pulse charger and voltage regulator are proposed that can reuse the waste lead acid battery. The first we develop the voltage regulator that can reuse the waste lead battery. And the pulse current is applied to the terminal of the waste lead acid battery. The voltage regulator is available principle of the pulse current which can reduce the sulfate to incipient material such as Pb and PbO2. Therefore the internal resistance of the lead acid battery is decreased, the performance of the lead acid battery is improved and the durability is prolonged. The second we develop the pulse charger using the voltage regulator. The pulse charger uses the switch mode of the forward convert method. The pulse charger maintain the constant voltage in state removing the lead acid battery and when it connected the pulse charger, it is converted the charge mode of the constant current immediately. It continues the rapid charge until the full state of the lead acid battery. After that the pulse charger is converted to the charge mode of constant voltage automatically, and then it continues the normal charge. The experiment results show that the effectiveness of the voltage regulator and pulse charger such as the good performance and the prolonged durability in lead acid battery of the small and large capacity.

Online Embedded Impedance Measurement Using High-Power Battery Charger

Yong-Duk Lee,Sung-Yeul Park,Soo-Bin Han IEEE 2015 IEEE transactions on industry applications Vol.51 No.1

<P>This paper presents a new functionality for high-power battery chargers by incorporating an impedance measurement algorithm. The measurement of battery impedance can be performed by the battery charger to provide an accurate equivalent model for battery management purposes. In this paper, an extended control capability of the onboard battery charger for electric vehicles is used to measure the online impedance of the battery. The impedance of the battery is measured by the following: 1) injecting ac current ripple on top of the dc charging current; 2) transforming voltage and current signals using a virtual α-β stationary coordinate system, a d-q rotating coordinate system, and two filtering systems; 3) calculating ripple voltage and current values; and 4) calculating the angle and magnitude of the impedance. The contributions of this paper are the use of the d-q transformation to attain the battery impedance, theta, and its ripple power, as well as providing a controller design procedure which has impedance measurement capability. The online impedance information can be utilized for diverse applications such as the following: 1) a theta control for sinusoidal current charging; 2) the quantifying of reactive current and voltage; 3) ascertaining the state of charge; 4) determining the state of health; and 5) finding the optimized charging current. Therefore, the benefit of this method is that it can be deployed in already existing high-power chargers regardless of battery chemistry. Validations of the proposed approach were made by comparing measurement values by using a battery charger and a commercial frequency response analyzer.</P>

Single Sensor Charging System with MPPT Capability for Standalone Streetlight Applications

Siti Rahimah Osman,Nasrudin Abd. Rahim,Jeyraj Selvaraj,Yusuf A. Al-Turki 전력전자학회 2015 JOURNAL OF POWER ELECTRONICS Vol.15 No.4

Maximum power point tracking (MPPT) and battery charging control are two important functions for a solar battery charger. The former improves utilization of the available solar energy, while the latter ensures a prolonged battery life. Nevertheless, complete implementation of both functions can be complex and costly, especially for low voltage application such as standalone street lamps. In this paper, the operation of a solar battery charger for standalone street light systems is investigated. Using only one voltage sensor, the solar charger is able to operate in both MPPT and constant voltage (CV) charging mode, hence providing high performance at a low cost. Using a lab prototype and a solar simulator, the operation of the charger system is demonstrated and its performance under varying irradiance is validated.

A Phase Shift Full Bridge Converter with Information Integrated for Battery Charger

Ruwen Wang,Siyu Tong,Qingfeng Zhang,Yu Chen 전력전자학회 2023 ICPE(ISPE)논문집 Vol.2023 No.-

Bidirectional communication between the battery charger and the Lithium-ion batteries is very important to ensure the safe operation of batteries. There is a trend towards the elimination of communication lines by means of wireless technology. Noticing that the information from the charger to the battery (C2B) is simple logic signals 0 or 1, this paper proposes an idea to integrate the information directly into the power transfer path of the battery charger with phase shift full bridge structure, to save hardware cost. The information is converted to senary data and integrated into the charger through the frequency-shift modulation and the phase-shift modulation. The logical information is then demodulated by the controllers on the battery side. The proposed method achieves the C2B information transmission with no extra hardware cost and little negative effect on the charging process. The effectiveness is verified by experiments.