• Plant Journal
• /
• v.16 no.4
• /
• pp.40-44
• /
• 2020

In this study, after supplying a pulse wave to the 2 V Industrial Lead-Acid Battery electrode plate and repeating the charging and discharging, the discharging time per voltage was analyzed. According to the result of experiment, while the lead-acid Battery that a pulse wave is not supplied decreased about 18 % of discharging capacity than the beginning, the lead-acid Battery that a pulse wave is supplied decreased a little amount much lower than 18 %, of discharging capacity and recorded the 0.56 % decrease, at a minimum, from discharging capacity at the 20 kHz frequency. This means that the sulfate on electrode plate is detached and the positive and negative charge transfer is highly activated at the 20 kHz frequency

• Proceedings of the KIEE Conference
• /
• 2011.07a
• /
• pp.1358-1359
• /
• 2011

연축전지는 충전과 방전을 반복함에 따라 그 용량이 감소하는 특성을 보인다. 연축전지의 이러한 특성은 충전/방전 과정에서 전지의 극판에서 일어나는 화학반응 중 충전/방전에 관여하지 않는 비가역적인 반응이 발생하여 극판의 활물질의 감소를 가져오기 때문이다. 본 논문에서는 이러한 비가역적인 반응을 감소시키고 비가역 반응에 의해 생성된 화합물을 분해해 극판의 활물질로 되돌릴 수 있는 shark pulse 파형을 이용한 충전 방법을 제안한다. 제안된 충전방법으로 각기 열화정도가 다른 골프카트용 12V 연축전지를 대상으로 충전실험을 하였고, 방전실험을 통해 그 용량을 측정하였다. 그 결과 실험 대상 축전지는 SoH(State of Health)가 각각 7%와 27% 만큼 개선됨을 확인하였다.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.16 no.5
• /
• pp.3391-3398
• /
• 2015

Recently, the large scaled lead-acid battery is widely introduced to efficient operation of the photovoltaic system in many islands. but the demand of lithium-ion battery is getting increased by the operation of wind power and replacement of the lead-acid battery. And also, under the renewable portfolio standard(RPS) and energy efficiency resource standard(EERS) policy of Korea government, the introduction of energy storage system(ESS) has been actively increased. Therefore, this paper presents the operation algorithm of hybrid battery management system(BMS) using the lead-acid and lithium-ion batteries, in order to maximize advantage of each battery. In other words, this paper proposed the algorithm of state of charge(SOC) and hybrid operation algorithm to calculate the optimal composition rate considering the fixed cost and operation cost of each battery. From the simulation results, it is confirmed that the proposed algorithms are an effective tool to evaluate SOC and to optimally operate hybrid ESS.

• KEPCO Journal on Electric Power and Energy
• /
• v.2 no.1
• /
• pp.49-54
• /
• 2016

The large scaled lead-acid battery is widely used for efficient operation of the photovoltaic system in many islands. However, lithium-ion battery is now being introduced to mitigate the fluctuation of wind power and to replace lead-acid battery. Therefore, hybrid ESS (Energy Storage system) that combines lithium-ion battery with lead-acid battery is being required because lithium-ion battery is costly in present stage. Under this circumstance, this paper presents the optimal algorithm to create composition rate of hybrid ESS by considering fixed and variable costs in order to maximize advantage of each battery. With minimization of total cost including fixed and variable costs, the optimal composition rate can be calculated based on the various scenarios such as load variation, life cycle and cost trend. From simulation results, it is confirmed that the proposed algorithms are an effective tool to produce a optimal composition rate.

• 보일러설비
• /
• s.63
• /
• pp.72-73
• /
• 1999

• 보일러설비
• /
• s.80
• /
• pp.100-104
• /
• 2000

• 전기의세계
• /
• v.26 no.1
• /
• pp.49-53
• /
• 1977

본고는 다음의 내용을 다루었다. 1. 개발현황 2. 청화대학 제1단계 전기차 개발 3. 차의 구성 4. 연축전지 5. 동력제어 6. 추력과 속도

• 한국전기화학회:학술대회논문집
• /
• 1999.11a
• /
• pp.129-136
• /
• 1999

• Electrical & Electronic Materials
• /
• v.11 no.9
• /
• pp.31-34
• /
• 1998

• NEWSLETTER 전기공업
• /
• no.94-21 s.118
• /
• pp.23-47
• /
• 1994