Chil‐Hoon Doh

Preventing thermal runaway of high-nickel Li-ion battery through nonflammable carbonates-based electrolyte formulation

Yen Hai Thi Tran, Kihun An, Guntae Lim, Dokyung Kim et autres

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Understanding Capacity Recovery Behavior Using Long-Term Stored Pouch Cells

Siyoung Park, Yong Min Lee, Hyobin Lee, Tai-Jong Jung et autres

Commercial lithium-ion batteries often experience capacity and power degradation when stored for extended periods after production. Interestingly, the reduced capacity can be partially recovered over time when the cells are cycled again, a phenomenon known as capacity recovery. However, it is difficult …

Microstructure-based digital twin thermo-electrochemical modeling of LIBs at the cell-to-module scale

Si-Young Park, Hyobin Lee, Seungyeop Choi, Jaejin Lim et autres

As the application of lithium-ion batteries (LIBs) expands beyond conventional electric vehicles (EVs) to heavy vehicles such as electric trucks or trams, the importance of thermal management in LIB systems is increasing, even at the module or pack level. In particular, because …

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Thermal stability analysis of nitrile additives in LiFSI for lithium-ion batteries: An accelerating rate calorimetry study

Mukarram Ali, Siyoung Park, Asif Hassan Raza, Cheolhee Han et autres

Although lithium-ion batteries (LIBs) are extensively used as secondary storage energy devices, they also pose a significant fire and explosion hazard. Subsequently, thermal stability studies for LiPF 6 - and LiFSI-type electrolytes have been conducted extensively. However, the thermal characteristics of these …

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Thermal Stability Analysis of Nitrile Additives in Lifsi for Lithium-Ion Batteries: An Accelerating Rate Calorimetry Study

Mukarram Ali, Siyoung Park, Asif Hassan Raza, Cheolhee Han et autres

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A Report of the Battery Properties on the Operation of an Electric Vehicle (KONA, HYUNDAI)

Chil‐Hoon Doh

KONA-EV를 3년 정도 운용하면서 전지 특성을 정리하였다. 주요 특성은 전지전압, 충전상태, 충전(방전)심도, 활력상태, 주행거리 등이었다. 연간주행거리는 29,000 km 정도였고, 활력상태는 시간(년)의 루트에 대해 0.3339의 감소 속도였고, 평균충전심도는 33.08%이었으며, 전비는 통상적인 사용 환경에서 충전에너지와 방전에너지에 대하여 각각 4.737 km/kWh와 4.946 km/kWh이었다. 활력상태의 감소 …

Unveiling the Effects of the Diffusivity and Exchange Current Density on the Electrochemical Modeling of Lithium-Ion Battery

Hyobin Lee, Seungwon Yang, Suhwan Kim, Jihun Song et autres

The diffusivity and exchange current density are the two main parameters that determine both ionics and electrodics in the Newman’s battery model. Nonetheless, the values of both parameters are normally selected from eminent literatures or experimental data measured under specific conditions, furthermore, …

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Understanding the effects of diffusion coefficient and exchange current density on the electrochemical model of lithium-ion batteries

Hyobin Lee, Seungwon Yang, Suhwan Kim, Jihun Song et autres

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Statistical and computational analysis for state-of-health and heat generation behavior of long-term cycled LiNi0.8Co0.15Al0.05O2/Graphite cylindrical lithium-ion cells for energy storage applications

Tai-Jong Jung, Hyobin Lee, Sun Ho Park, Jihun Song et autres

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Experiment and Electro-Thermo-Chemical Modeling on Rapid Resistive Discharge of Large-Capacity Lithium Ion Battery

Chil‐Hoon Doh, Yoon‐Cheol Ha, Seung-Wook Eom, Jihyun Yu et autres

Heat generation and temperature of a battery is usually presented by an equation of current. This means that we need to adopt time domain calculation to obtain thermal characteristics of the battery. To avoid the complicated calculations using time domain, ‘state of …

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Entropy, Internal Resistance, Open Circuit Cell Potential and Specific Heat Capacity of Pouch 75 Ah Lithium Ion Cell

Chil‐Hoon Doh, Yoon‐Cheol Ha

전지의 대형화와 직·병렬 집적화에 따라서 흡·발열량, 온도변화, 내부저항의 변화를 예견하고 측정하여 감시하는 것은 이동형의 electric vehicle(EV)과 고정형의 battery energy storage system(BESS)을 안전하게 운용할 수 있도록 하는 중요한 일이다. 전지의 정전류 충·방전과 단락 등 급격한 전지 전위의 변화에 대한 발열과 흡열의 열화학 관계를 …

Design of an Effective State of Charge Estimation Method for a Lithium-Ion Battery Pack Using Extended Kalman Filter and Artificial Neural Network

Van Quan Dao, Minh-Chau Dinh, Chang Soon Kim, Minwon Park et autres

Currently, Lithium-ion batteries (LiB) are widely applied in energy storage devices in smart grids and electric vehicles. The state of charge (SOC) is an indication of the available battery capacity, and is one of the most important factors that should be monitored …

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