• 한국신재생에너지학회:학술대회논문집
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• 2010.06a
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• pp.145.1-145.1
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• 2010

현재 운송수단의 주 동력원으로 사용되고 있는 내연기관은 연료로 사용되는 석유로부터 온실가스가 발생하기 때문에 지구 환경악화의 주범으로 작용하기 때문에 교토 의정서에 의해 많은 제재를 받고 있으며, 이 문제를 해결하기 위해서 다양한 종류의 하이브리드 제품으로 대체하고자 하는 연구개발이 세계 각국에서 활발히 진행되고 있다. 한국은 저탄소 녹색성장이라는 기치하에 2012년 까지 2000만대의 자전거 보급과 세계3대 자전거 생산국으로 발전한다는 비전을 제시하여 향후 자전거 산업이 비약적으로 발전할 것으로 예상되고 있다. 이와 같은 비전을 달성하기 위해서는 저가이면서 출력이 크고 수명이 긴 축전지의 개발이 필수적이며, 이와 더불어 축전지의 성능 발휘를 위해서 이것을 제어할 수 있는 battery management system(BMS)의 개발도 같이 이루어져야 한다. 리튬 배터리의 성능이 우수한 것은 익히 알려진 사실이지만, 고가이기 때문에 소비자들의 부담이 적지 아니하다. 따라서 혁신적인 기술이 개발되어 저가의 배터리를 사용하기 전까지는 납축전지도 같이 사용될 것이며, 본 과제에서는 이와 같은 납 축전지의 수명을 연장시킬 수 있는 BMS를 개발하였다.

• International Journal of Internet, Broadcasting and Communication
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• v.10 no.3
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• pp.104-108
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• 2018

Lithium-ion batteries have been used in energy storage systems (ESS), electric vehicles (EVs), etc. due to their high safety, fast charging and long lifecycle. This paper aims to improve the convenience of users by changing the wired battery stack used in the battery pack, wirelessly using RFID, reducing the internal volume of the battery pack, reducing the size of the battery pack. In this paper, we propose a battery management system which can provide the flexibility of battery pack expansion and maintenance by using lithium ion battery, battery management system (BMS) and wireless communication for light weight of 1Kw small battery pack. Also, by flexibly arranging the cell layout inside the battery pack and designing to reduce the size of the outer shape of the battery pack.

• Journal of Advanced Marine Engineering and Technology
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• v.40 no.7
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• pp.635-641
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• 2016

In order to drive a hybrid propulsion device which combines an engine and an electric propulsion unit, battery packs that contain dozens of unit cells consisting of a lithium-based battery are used to maintain the power source. Therefore, it is necessary to more strictly manage a number of battery cells at any given time. In order to manage battery cells, generally voltage, current, and temperature data under load condition are monitored from a personal computer. Other important elements required to analyze the condition of the battery are the internal resistances that are used to judge its state-of-health (SOH) and the open-circuit voltage (OCV) that is used to check the battery charging state. However, in principle, the internal resistances cannot be measured during operation because the parallel equivalent circuit is composed of internal loss resistances and capacitance. In most energy storage systems, battery management system (BMS) operations are carried out by using data such as voltage, current, and temperature. However, during operation, in the case of unexpected battery cell failure, the output voltage of the power supply can be changed and propulsion of the hybrid vehicle and vessel can be difficult. This paper covers the implementation of a high safety battery management system (HSBMS) that can estimate the OCV while the device is being driven. If a battery cell fails unexpectedly, a DC power supply with lithium iron phosphate can keep providing the load with a constant output voltage using the remainder of the batteries, and it is also possible to estimate the internal resistance.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.3
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• pp.587-596
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• 2021

Naval battleships have systems to perform special purposes, such as the Command and Fire Control System (CFCS). Some of the this equipment should be equipped with an Uninterruptible Power System (UPS ) to ensure operational continuity and the backup of important data, even during unexpected power outages caused by problems with the ship's power generator. Heavy combat losses can occur if the equipment cannot satisfy the function. Therefore, it is important to design a stable UPS. The battery and Battery Management System (BMS) are two of the most important factors for designing a stable UPS. A power outage will be encountered if the battery and BMS are not stable. The customer will be exposed to abnormal situations, loss of important tactical data, and inability to operate some of the CFCS. As a result, an enhanced safety system should be designed. Thus, this study implemented and verified the improved system in terms of three methods, such as comparative analysis of the batteries, improvement about leakage current of the circuit, and tests of the aggressive environmental resistance to improve the UPS for CFCS.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.1319-1322
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• 2015

일반적으로 이차전지를 이용한 에너지 저장 시스템(ESS, Energy Storage System)과 전기 자동차(EV, Electric Vehicle)에 사용되는 전지(Battery)는 용량에 따라 직 병렬로 수십 개에서 수 만개의 배터리가 사용되기도 한다. 이러한 많은 배터리를 제어하고 관리하기 위해 필요한 것이 배터리 관리 시스템(BMS, Battery Management System)이다. 이러한 BMS는 ESS(Energy Storage System, 에너지저장시스템)의 핵심부품으로서, 관련업계에서는 새로운 기술 개발에 박차를 가하고 있다. 따라서 본 논문에서는 최근 개발되고 있는 AC 임피던스를 이용한 SOH 예측 기능을 검증할 수 있는 DSP(Digital Signal Processing) Platform 기반으로 Master-Slave 형태의 BMS를 개발하였으며, Master-Slave간에는 CAN 통신을 이용하여 제어성, 확장성을 용이하게 함으로써, 새로운 SOH 알고리즘 구현 및 성능 검증을 손 쉽게 구현할 수 있게 되었다.

• Proceedings of the KIEE Conference
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• 2002.07b
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• pp.1223-1225
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• 2002

This paper has described in Electric Vehicle Battery Management System(EV BMS). EV BMS manages the input/output energy of the traction battery, and provides the optimum environment condition during charging/ driving through the communication with other controllers. In this paper, we introduce our BMS for Santa Fe EV. Hyundai Motor Company has been developed EV since 1990. Recently, Santa Fe EV has been demonstrating with the environmental friendly technology. Two year real road testing program with electric powered Santa Fe is being undertaken by HMC in Hawaii.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.10a
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• pp.882-883
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• 2013

With the development of the society, pure electric vehicles will be surely important of the future. Electric vehicle requires various technology like motor driving, battery management, operational efficiencies and so on. Battery management is indeed the most important to enhance battery's performance and life. This paper has deeply discussed and studied on the lithium-polymer battery management system of pure electric vehicle. First of all we have analyzed the characteristic of the lithium-polymer batteries and the factors influenced on the state of charge. Then a logical SOC measuring method has been raised, which is the combination of open circuit voltage and Ah integration. The next we will introduce the design of battery management system, the battery management system performs many functions, such as inspecting the whole process, when it's running cell equalization protecting and diagnosing the battery, estimating the state of charge. The module design style including microcontroller, data aquisition module, charging control module and serial communication module. To arrive at conclusions, the battery management system which this paper has introduced is reliable and economical.

• Proceedings of the KIPE Conference
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• 2017.07a
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• pp.64-65
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• 2017

This paper review the core technical trends of TESAL EV(Electric Vehicle) Motors. The object of this study analyzes electric vehicle's body appearance, motor cooling system, battery arrangement, battery management system (BMS), and super charging station etc.

• Proceedings of the KIPE Conference
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• 2018.11a
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• pp.131-132
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• 2018

The world market for BESS (Battery Energy Storage System) is growing rapidly, and battery technology is also developing. It is important to understand the battery characteristics and develop a control strategy to develop the optimal BMS (Battery Management System). In this paper, we compare and analyze the parameter characteristics of NCM LIB (Lithium Ion Battery) according to the temperature change.

• Proceedings of the KIPE Conference
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• 2012.07a
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• pp.152-153
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• 2012

본 논문에서는 리튬이온 배터리 셀을 이용한 4kWh급 배터리팩의 배터리 관리 시스템(BMS, Battery Management System) 개발을 연구하였다. 리튬이온 배터리는 셀의 특성 때문에 반드시 배터리 관리 시스템이 필요하며, 배터리 팩으로 제작시 각 셀의 상태 모니터링 및 보호를 위하여 필수적인 장치이다. 제작된 배터리 관리 시스템은 충방전 시험과정을 거쳐 순수 전기자동차에 사용될 배터리 관리 시스템으로 사용가능함을 실험하였다.