scholarly journals Design and Simulation of Passive Thermal Management System for Lithium-Ion Battery Packs on an Unmanned Ground Vehicle

2016 ◽  
Vol 9 (1) ◽  
Author(s):  
Kevin K. Parsons ◽  
Thomas J. Mackin
Keyword(s):  
Natural Convection ◽  
Thermal Management ◽  
Management System ◽  
Operating Temperature ◽  
Lithium Ion ◽  
Maximum Temperature ◽  
Unmanned Ground Vehicle ◽  
Ground Vehicle ◽  
Thermal Management System ◽  
Power Draw

The transient thermal response of a 15-cell, 48 V, lithium-ion battery pack for an unmanned ground vehicle (UGV) was simulated using ANSYS fluent. Heat generation rates and specific heat capacity of a single cell were experimentally measured and used as input to the thermal model. A heat generation load was applied to each battery, and natural convection film boundary conditions were applied to the exterior of the enclosure. The buoyancy-driven natural convection inside the enclosure was modeled along with the radiation heat transfer between internal components. The maximum temperature of the batteries reached 65.6 °C after 630 s of usage at a simulated peak power draw of 3600 W or roughly 85 A. This exceeds the manufacturer's maximum recommended operating temperature of 60 °C. We present a redesign of the pack that incorporates a passive thermal management system consisting of a composite expanded graphite (EG) matrix infiltrated with a phase-changing paraffin wax. The redesigned battery pack was similarly modeled, showing a decrease in the maximum temperature to 50.3 °C after 630 s at the same power draw. The proposed passive thermal management system kept the batteries within their recommended operating temperature range.

scholarly journals Development and Analysis of a New Cylindrical Lithium-Ion Battery Thermal Management System

2021 ◽  
Author(s):  
Ya-Song Sun ◽  
Rui-Huai Bai
Keyword(s):  
Thermal Management ◽  
Electric Vehicles ◽  
Management System ◽  
Optimization Design ◽  
Lithium Ion ◽  
Simulation Software ◽  
Maximum Temperature ◽  
Battery Thermal Management ◽  
Thermal Management System ◽  
Battery Thermal Management System

Abstract With the development of modern technology and economy, environmental protection and sustainable development have become the focus of global attention. In this paper, the promotion and development of electric vehicles have bright prospects, and they are also facing many challenges. Under different operating conditions, various safety problems of electric vehicles are emerging one after another, especially the potential safety hazards caused by battery overheating are threatening the development process of electric vehicles. In this paper, a new type of indirect liquid cooling system is designed and optimized for cylindrical lithium-ion batteries, and a variety of design schemes for different cooling channel structures and cooling liquid inlet direction are proposed, and the corresponding solid-fluid coupling model is established. COMSOL Multiphysics simulation software models, simulates and analyses cooling systems. In order to optimize the system and improve the optimization efficiency, the Kriging method is used to construct an approximation model of the thermal management system, and the influencing factors sensitivity analysis and optimization design of the thermal management system are also conducted. The results show that there has a significant influence on the maximum temperature and temperature difference of the battery system. According to the optimization design of these factors based on the Non-dominated Sorting Genetic Algorithm (NSGA-II), it is found that the optimized thermal management system has the best ability to dissipate heat and maintain temperature uniformity as compared to the original design. In addition, this optimization system has the ability to prevent thermal runaway propagation under the condition of thermal abuse conditions. With these prominent performances, the proposed method is expected to provide insights into the engineering design and optimization of the battery thermal management system for electric vehicle.

scholarly journals A hybrid thermal management system for high power lithium-ion capacitors combining heat pipe with phase change materials

Heliyon ◽  
2021 ◽  
pp. e07773
Author(s):  
Danial Karimi ◽  
Md Sazzad Hosen ◽  
Hamidreza Behi ◽  
Sahar Khaleghi ◽  
Mohsen Akbarzadeh ◽  
...  
Keyword(s):  
Phase Change ◽  
Heat Pipe ◽  
Thermal Management ◽  
High Power ◽  
Management System ◽  
Phase Change Materials ◽  
Lithium Ion ◽  
Thermal Management System

Optimization of an air-based thermal management system for lithium-ion battery packs

2021 ◽  
Vol 44 ◽  
pp. 103314
Author(s):  
Yusong Wang ◽  
Bin Liu ◽  
Peng Han ◽  
Changsheng Hao ◽  
Shaohua Li ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Thermal Management ◽  
Management System ◽  
Lithium Ion ◽  
Thermal Management System ◽  
Battery Packs

scholarly journals Thermal Performance of a Cylindrical Lithium-Ion Battery Module Cooled by Two-Phase Refrigerant Circulation

Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 8094
Author(s):  
Bichao Lin ◽  
Jiwen Cen ◽  
Fangming Jiang
Keyword(s):  
Thermal Management ◽  
Management System ◽  
Cooling System ◽  
Maximum Temperature ◽  
Two Phase ◽  
Battery Thermal Management ◽  
Thermal Management System ◽  
Battery Thermal Management System ◽  
Li Ion ◽  
Battery Module

It is important for the safety and good performance of a Li-ion battery module/pack to have an efficient thermal management system. In this paper, a battery thermal management system with a two-phase refrigerant circulated by a pump was developed. A battery module consisting of 240 18650-type Li-ion batteries was fabricated based on a finned-tube heat-exchanger structure. This structural design offers the potential to reduce the weight of the battery thermal management system. The cooling performance of the battery module was experimentally studied under different charge/discharge C-rates and with different refrigerant circulation pump operation frequencies. The results demonstrated the effectiveness of the cooling system. It was found that the refrigerant-based battery thermal management system could maintain the battery module maximum temperature under 38 °C and the temperature non-uniformity within 2.5 °C for the various operation conditions considered. The experimental results with 0.5 C charging and a US06 drive cycle showed that the thermal management system could reduce the maximum temperature difference in the battery module from an initial value of 4.5 °C to 2.6 °C, and from the initial 1.3 °C to 1.1 °C, respectively. In addition, the variable pump frequency mode was found to be effective at controlling the battery module, functioning at a desirable constant temperature and at the same time minimizing the pump work consumption.

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