Article
Energy & Fuels
Haimin Wang, Huanqi Li, Zhiyuan Ji, Zhen Yang, Chenglong Jiang, Hao Lin
Summary: Temperature is a crucial factor in ensuring the safety and performance of battery modules. By using cooling tabs, the temperature of the LiFePO4 battery collector can be controlled within a reasonable range, especially at high discharge rates. A test system with air-forced cooling tabs was designed to study the temperature distribution in a 4s2p LiFePO4 battery module under different working conditions. The MCC index was proposed to evaluate the cooling effect at different air velocities, providing useful insights for battery pack design.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Se Hyeon Ham, Dong Soo Jang, Minwoo Lee, Yunseok Jang, Yongchan Kim
Summary: The objective of this study is to evaluate the thermal management performance of a tab-cooling method for pouch-type lithium-ion batteries under various operating conditions. The tab-cooling method shows better thermal performance for battery cooling than the fin-thickness method owing to its effective cooling performance, especially at high discharge rates. It also demonstrates a higher cooling performance-to-weight ratio due to the higher thermal conductivity and lightness of ceramics. The tab-cooling method improves the lifespan of the battery and has higher equivalent full cycle (EFC) and EFC-to-weight ratio compared to the no-tab (NT) cooling condition at specified fin thickness.
APPLIED THERMAL ENGINEERING
(2023)
Article
Electrochemistry
Jie Deng, Ian Smith, Chulheung Bae, Phil Rairigh, Theodore Miller, Bapiraju Surampudi
Summary: The experimental results indicate that the failure mechanism, peak force, and penetration causing short-circuit in battery modules strongly depend on the impact direction, indenter shape, cell form factor, and module design. Therefore, improving battery safety in electrical vehicles requires simultaneous consideration of cell type, orientation, and module structure.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Energy & Fuels
Mao-Sung Wu
Summary: The forced air cooling of U-type BTMS can be improved by adjusting the distribution of battery spacing and inlet/outlet manifolds. Computational fluid dynamics is used to calculate the temperature and velocity distributions. Multi-objective optimization is performed to minimize temperature difference and fan power consumption. The optimized BTMS module reduces the temperature and temperature difference while maintaining low power consumption.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Peizhao Lyu, Xinjian Liu, Chenzhen Liu, Zhonghao Rao
Summary: This study investigated the temperature difference between the positive and negative tabs of pouch-type lithium-ion batteries and explored relevant heat rejection strategies. The results showed that the positive tab had a faster and more dangerous temperature rise, reaching 70.4 degrees Celsius during high-rate charging, with a maximum temperature difference of about 20.2 degrees Celsius during charge and discharge. Furthermore, an electro-thermal model revealed the potential risk of extreme temperature rise (up to 350 degrees Celsius) in the positive tab under high charging rates, which requires a relatively high heat transfer coefficient for temperature control.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Energy & Fuels
Sarawut Sirikasemsuk, Songkran Wiriyasart, Paisarn Naphon, Nittaya Naphon
Summary: This study investigates the thermal characteristics of a 18650-type lithium-ion battery pack with a thermoelectric module using ferrofluid as a coolant. The experimental results show that the thermoelectric cooling system significantly decreases the battery temperature, especially with varying parameters, particularly the concentration of ferrofluid, having a significant effect on reducing battery temperature.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
Ayodeji Adeniran, Sam Park
Summary: This study used multidomain modeling to analyze the thermal behavior of commercial 65 Ah pouch-type batteries. The results showed that using two-side cooling significantly improved the battery's thermal performance and charging efficiency.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Luyao Zhao, Wei Li, Guoyang Wang, Wenmin Cheng, Mingyi Chen
Summary: This research develops a novel hybrid battery thermal management system that combines direct liquid cooling with forced air cooling. Numerical simulations are conducted to analyze the effects of gap spacing, number of cooling pipelines, liquid flowing rate, and fan position on the cooling effects. The findings indicate the optimal configuration for the system, including a 5-mm spacing between the battery and liquid-cooling jacket, a double pipeline liquid-cooling structure, and a horizontal parallel flow of liquid coolant and air. The BTMS achieves good heat dissipation at a 4-C discharge rate and has the advantage of fire suppression in electric vehicles.
APPLIED THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Jiahao Liu, Qingwen Ma, Xianbin Li
Summary: In this study, a battery module consisting of sixteen 38120-type lithium-ion batteries was immersed in mineral oil to investigate the cooling effectiveness under various conditions. The results showed that increasing battery spacing and coolant flow rate can effectively reduce the temperature rise of the battery module. However, increasing flow rate also imposes restriction on the cooling efficiency due to pressure drop. The findings provide insights into the oil-immersed battery cooling system and may stimulate further development of BTMSs based on immersion cooling.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Huizhen Guo, Juan Li, Zhangyu Zhu, Peihong Lv
Summary: A novel cooling system, called liquid cold plates coupled with air flow channels (LCP-AFC), was proposed to enhance the thermal performance of electric vehicle batteries. The effects of various factors on battery heat dissipation were studied, and optimization of these factors resulted in significant reduction of battery module temperature and temperature difference.
ENERGY SCIENCE & ENGINEERING
(2022)
Article
Thermodynamics
Libin Duan, Huajin Zhou, Wei Xu, Lingling Li, Xing Liu, Zhanpeng Du, Haobin Jiang
Summary: A design method of multiple inlet/outlet air cooling frame based on thermal-fluid coupling topology optimization is developed to improve the deficiency of low cooling efficiency and poor temperature uniformity found in the traditional air cooling structure of pouch lithium-ion battery. The design criteria proposes new air cooling frames, with the 3 inlet/outlet cooling frame having the best heat exchanging performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Energy & Fuels
Obula Reddy Kummitha
Summary: This research introduces an innovative method to achieve uniform temperature distribution in battery modules, decreasing the maximum temperature obtained in battery cells. By analyzing the numerical results, it was found that the new model has lower maximum temperatures and smaller temperature gradients compared to the base model under various discharge conditions.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Jiedong Ye, Abdallah Yousef Mohammad Aldaher, Gangfeng Tan
Summary: This study aims to explore a composite thermal management system that leverages air and liquid cooling to maintain optimal temperatures in lithium-ion batteries. The research indicates that this system can significantly reduce temperature difference, decrease the highest temperature, and reduce entropy production.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Patcharin Saechan, Isares Dhuchakallaya
Summary: Recent studies have shown that increasing airflow can enhance battery pack cooling performance but also increase power consumption. Forced air-cooling may not be necessary at low discharge rates, but may be uneconomical at fast discharge rates. Narrow cell-to-cell distances can reduce cell temperature but also increase energy consumption and risk of thermal runaway.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Thermodynamics
Turgay Coskun, Erdal Cetkin
Summary: This article introduces a hybrid cold plate for thermal management of electric vehicle batteries and demonstrates through experiments that hybrid cooling can reduce battery temperature and temperature difference, extending battery life. The study also indicates that air cooling is suitable for variable discharge rates, while liquid cooling needs to consider contact resistance. In addition, the proposed hybrid cold plate can also be used for cooling electronic devices.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Haimin Wang, Yufei Wang, Feng Hu, Weijie Shi, Xuebin Hu, Huanqi Li, Si Chen, Hao Lin, Chenglong Jiang
Summary: Experimental results show that increasing the discharge rate of the battery leads to more heat energy released, while the total electric and heat energy remain the same. Using high thermal conductivity PCM can effectively manage battery temperature, predict thermal management failure, and enhance battery system safety.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Haimin Wang, Huanqi Li, Zhiyuan Ji, Zhen Yang, Chenglong Jiang, Hao Lin
Summary: Temperature is a crucial factor in ensuring the safety and performance of battery modules. By using cooling tabs, the temperature of the LiFePO4 battery collector can be controlled within a reasonable range, especially at high discharge rates. A test system with air-forced cooling tabs was designed to study the temperature distribution in a 4s2p LiFePO4 battery module under different working conditions. The MCC index was proposed to evaluate the cooling effect at different air velocities, providing useful insights for battery pack design.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Haimin Wang, Zhiyuan Ji, Chuanwei Wang, Zexu Zhu, Yifan Wang, Hao Lin
Summary: The novel solution of coupling the secondary loop and vapor injection technology (SL + VPI) using propane as a refrigerant shows promising results in improving heating performance and driving range in cold climate.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Haimin Wang, Zhen Yang, Chenglong Jiang, Zhiyuan Ji, Zexu Zhu
Summary: This study investigated the thermal runaway of NCM811 Lithium-ion battery triggered by nail penetration, and found that the state of charge (SOC) has a greater impact on thermal runaway compared to penetration depth. The thermal runaway of NCM811 LIB is more severe, especially when triggered by nail penetration.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Astronomy & Astrophysics
Daniela Calzetti, Sean T. Linden, Timothy McQuaid, Matteo Messa, Zhiyuan Ji, Mark R. Krumholz, Angela Adamo, Bruce Elmegreen, Kathryn Grasha, Kelsey E. Johnson, Elena Sabbi, Linda J. Smith, Varun Bajaj
Summary: Multiwavelength images from the Hubble Space Telescope reveal the presence of compact sources emitting in Pa beta but only marginally detected in H alpha, indicating young stellar clusters heavily attenuated by dust in the central area of NGC 4449. The age and size of these dusty clusters, located within dark clouds at the periphery of the galaxy, suggest that pre-SN feedback has not effectively cleared their natal cocoons, challenging existing models of star formation regulation. Confirmation of these findings would provide a more complex understanding of the role of stellar feedback in controlling star formation.
ASTROPHYSICAL JOURNAL
(2023)
Article
Thermodynamics
Haimin Wang, Zexu Zhu, Zhiyuan Ji, Feng Hu, Hao Lin
Summary: A one-dimensional heat transfer model is established to study the characteristics of internal heat source and temperature distribution of a cylindrical battery. The results show that the calculated temperature is close to the measured temperature at 40 degrees C ambient temperature, but there is a significant difference at -10 degrees C ambient temperature.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Astronomy & Astrophysics
Alex J. Cameron, Aayush Saxena, Andrew J. Bunker, Francesco D'Eugenio, Stefano Carniani, Roberto Maiolino, Emma Curtis-Lake, Pierre Ferruit, Peter Jakobsen, Santiago Arribas, Nina Bonaventura, Stephane Charlot, Jacopo Chevallard, Mirko Curti, Tobias J. Looser, Michael V. Maseda, Tim Rawle, Bruno Rodriguez Del Pino, Renske Smit, Hannah Ubler, Chris Willott, Joris Witstok, Eiichi Egami, Daniel J. Eisenstein, Benjamin D. Johnson, Kevin Hainline, Marcia Rieke, Brant E. Robertson, Daniel P. Stark, Sandro Tacchella, Christina C. Williams, Christopher N. A. Willmer, Rachana Bhatawdekar, Rebecca Bowler, Kristan Boyett, Chiara Circosta, Jakob M. Helton, Gareth C. Jones, Nimisha Kumari, Zhiyuan Ji, Erica Nelson, Eleonora Parlanti, Lester Sandles, Jan Scholtz, Fengwu Sun
Summary: We present emission-line ratios from a sample of 27 Lyman-break galaxies at z similar to 5.5-9.5, showing that they occupy distinct regions of line-ratio space compared to typical low-redshift galaxies. The scatter in line ratios suggests significant diversity in ISM conditions within the sample. The observed emission-line ratios are generally consistent with galaxies with high ionisation parameters and a range of metallicities, indicating low-metallicity systems undergoing rapid star formation.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Energy & Fuels
Haimin Wang, Chuanwei Wang, Chenglong Jiang, Jiangang Zhou, Wenqin Liu, Zhiyuan Ji, Guodong Meng, Feng Zhao
Summary: A high-power charging strategy is proposed, which considers charging time and current as constraints, and minimizes heat generation as the optimization objective. Due to the minimal fluctuation of the internal resistance in a specific SOC range, the optimal range for high-power charging is selected. Six stages are divided at equal intervals within this SOC range, and a three-dimensional matrix is formed to find the optimal solution using the random value iteration method. The strategy segments and combines different high powers and effectively controls the maximum temperature rise of the battery.
JOURNAL OF ENERGY STORAGE
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Guiqing Sun, Yuchen Zhang, Zhiyuan Ji, Tao Yang, Xue Chen
Summary: This paper studies the method of subcarrier demultiplexing in an ASCM system and proposes a FO estimation and compensation scheme based on spectral dip searching and local subcarrier frequency adjusting.
2022 ASIA COMMUNICATIONS AND PHOTONICS CONFERENCE, ACP
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Yuchen Zhang, Xue Chen, Zhiyuan Ji, Guiqing Sun, Tao Yang, Liangjun Zhang, Weiming Wang
Summary: This paper proposes a low computational complexity timing recovery scheme for DSCM systems and demonstrates its potential application in the field.
2022 ASIA COMMUNICATIONS AND PHOTONICS CONFERENCE, ACP
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Zhiyuan Ji, Yuchen Zhang, Xue Chen, Guiqing Sun, Tao Yang, LiangJun Zhang, Weiming Wang
Summary: DSCM is a communication technology based on advanced DSP that improves tolerance to fiber nonlinearity and increases transmission distance and capacity. However, compared to high symbol rate single carrier systems, DSCM signals are more sensitive to insufficient device bandwidth, necessitating a DSP scheme with pre-equalization.
2022 ASIA COMMUNICATIONS AND PHOTONICS CONFERENCE, ACP
(2022)
