[논문]A Study on the Charging and Diagnosis System of xEV Reusable Waste Battery

Park, Sung-Jun; Kim, Chun-Sung; Park, Seong-Mi

doi:10.21289/ksic.2021.24.6.669

A Study on the Charging and Diagnosis System of xEV Reusable Waste Battery 원문보기

한국산업융합학회 논문집 = Journal of the Korean Society of Industry Convergence, v.24 no.6/1, 2021년, pp.669 - 681

Park, Sung-Jun (Dept. of Electrical Engineering, Chonnam National University) , Kim, Chun-Sung (Green Energy Institute) , Park, Seong-Mi (Dept. of Lift Engineering, Korea Lift College)

Abstract ▼ AI-Helper

As the supply of xEV in Korea is rapidly increasing, the amount of waste batteries is expected to increase rapidly, but the current recycling system for waste xEV batteries is very insufficient. In order to properly utilize the xEV reusable battery module, it is essential to classify it into a type that has similar discharge characteristics to the current state of health(SOH), which is the discharge capacity of the battery. This paper proposes a system that can minimize the exchange of energy with the KEPCO system by using the charging/discharging method by circulating power between batteries in order to minimize the power consumption when charging and discharging waste batteries. In the proposed system, a function to measure parameters during the charging/discharging test of the waste battery was implemented to build a customized big date for the test waste battery. In addition, the dynamic characteristics of the proposed circuit were analyzed using PSIM, which is useful for power electronics analysis, and the validity of the proposed circuit was verified through experiments.

주제어

표/그림 (15)

그림 Fig. 1 Composition of battery equivalent circuit
그림 Fig. 2 Simplified battery model
그림 Fig. 3 2-level current parameter equivalent circuit
그림 Fig. 4 Charger discharger system using circulating current
그림 Fig. 5 Li-ion battery modeling and real objects
표 Table 1. Battery specification sheet
그림 Fig. 6 Discharge characteristics according to discharge current
그림 Fig. 7 Configuration of propose system
그림 Fig. 8 Bidirectional converter topology for battery charging and discharging
그림 Fig. 9 Bidirectional converter prototype for battery charging and discharging
그림 Fig. 10 AC/DC converter and BPTS prototype
그림 Fig. 11 Operation characteristic waveform of DC/DC converter
그림 Fig. 12 Battery charge characteristics Waveform
그림 Fig. 13 Characteristics of internal resistance value variation according to the amount of charge
표 Table 2. Battery similarity

AI 본문요약
AI-Helper

제안 방법

In this paper, the battery equivalent circuit was analyzed based on the Randles model to analyze the characteristics of the reused battery, and the DCIR method was used for practical measurement of the battery internal impedance of the equivalent circuit. In order to minimize the power consumption during the full charge/discharge test, a charging / discharging system using the circulating power between the batteries sharing the DC-Bus was proposed.
This paper proposes a system that can minimize the exchange of energy with the KEPCO system by using the charging and discharging method by circulating power between batteries in order to minimize the power consumption when charging and discharging waste batteries. The proposed system is a customized big date for test waste batteries was built by implementing a function that can measure parameters during the charging/discharging test of waste batteries.

대상 데이터

The proposed system uses a bidirectional DC/DC converter that can transfer energy to and from each battery to classify the 8 sets of reusable battery classes, and is connected to the DC common bus. At this time, an internal energy dump was additionally installed using a bidirectional DC/DC converter so that the sum of the internal circulation currents became zero so that the battery charge/discharge test could be performed without external energy supply.

참고문헌 (10)

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원문보기 상세보기
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상세보기
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상세보기
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상세보기
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상세보기
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상세보기
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상세보기
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상세보기
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상세보기

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