4.5 Review

A Review of Advanced Cooling Strategies for Battery Thermal Management Systems in Electric Vehicles

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Experimental investigations of liquid immersion cooling for 18650 lithium-ion battery pack under fast charging conditions

Yang Li et al.

Summary: This study proposes and tests a novel battery thermal management system (BTMS) based on FS49 for cooling cylindrical lithium-ion battery (LIB) modules during fast charging. It compares the temperature response of the battery modules during 2C and 3C rates charging with forced air cooling (FAC) and liquid immersion cooling (LIC). The results show that LIC has excellent heat dissipation performance, reducing the peak temperature of the module by 7.7 degrees C and 19.6 degrees C compared to FAC, while consuming only 14.41% and 40.37% of the cooling energy. LIC also minimizes temperature non-uniformity in the battery pack, with a peak temperature difference of only 1.1 degrees C and 1.2 degrees C compared to 17.7% and 11.6% under FAC. The study demonstrates the potential application of LIC in the field of LIB fast charging.

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Experimental investigation and comparative analysis of immersion cooling of lithium-ion batteries using mineral and therminol oil

G. Satyanarayana et al.

Summary: The study emphasizes the importance of thermal management strategies for the technological development and widespread acceptance of lithium-ion batteries. Comparisons of different cooling methods show that low-cost direct liquid contact cooling significantly reduces the temperature of the batteries, leading to higher energy and current density.

APPLIED THERMAL ENGINEERING (2023)

Review Energy & Fuels

Identification and Mitigation of Shortcomings in Direct and Indirect Liquid Cooling-Based Battery Thermal Management System

Anisha et al.

Summary: Electric vehicles (EVs) have become a viable solution to the global climate crisis, with rechargeable battery packs serving as the energy storage system. The battery thermal management system (BTMS) plays a crucial role in regulating the performance of these vehicles. This paper focuses on the efficiency of liquid cooling-based BTMS for actual drive cycles and discusses various techniques to optimize its performance.

ENERGIES (2023)

Article Chemistry, Multidisciplinary

Experimental Investigation on Single-Phase Immersion Cooling of a Lithium-Ion Pouch-Type Battery under Various Operating Conditions

Ali Celen

Summary: In this study, the performance of a LiFePO4 pouch-type battery using air and liquid (immersion cooling) techniques was investigated. The results showed that the liquid immersion technique can reduce the battery temperature by 28% at a discharge rate of 4C. Furthermore, 100% liquid immersion cooling can lower the maximum temperature difference to 4 degrees Celsius.

APPLIED SCIENCES-BASEL (2023)

Article Energy & Fuels

Degradation analysis of 18650 cylindrical cell battery pack with immersion liquid cooling system. Part 1: Aging assessment at pack level

D. Koster et al.

Summary: Temperature is crucial for battery pack design, and thermal management is essential to ensure performance, safety, and lifespan in the application. This study investigates the degradation of two identical 18650 battery packs with different cooling systems, air cooling and immersed cooling. By conducting cycling tests, the behavior of the packs under the same degradation conditions but different cell temperature distributions is quantitatively and qualitatively analyzed. The results show that the immersed-cooled pack maintains a more homogeneous temperature distribution, resulting in a capacity retention increase of up to 3.3% after 600 cycles. However, the immersed-cooled pack experiences cell failures not observed in the air-cooled pack. An application-oriented analysis discusses the merits and drawbacks of implementing this solution, highlighting a potential reduction of up to 25% in pack specific energy when using the immersed-cooling system.

JOURNAL OF ENERGY STORAGE (2023)

Article Energy & Fuels

Heat transfer characteristics and influencing factors of immersion coupled direct cooling for battery thermal management

Zengpeng Wang et al.

Summary: This article proposes a new method of battery cooling, called ICDC (Immersion Coupled Direct Cooling), which immerses batteries in stationary fluid with direct-cooling tubes inserted in. The heat transfer characteristics and influencing factors of ICDC are explored numerically and experimentally. Results show that ICDC extends the optimal working duration by 150.3% and 45.7% compared to natural convection and immersion cooling, respectively, due to reduced battery temperature.

JOURNAL OF ENERGY STORAGE (2023)

Article Energy & Fuels

Experimental study of Li-ion battery thermal management based on the liquid-vapor phase change in direct contact with the cells

Majid Goodarzi et al.

Summary: One of the significant challenges in using lithium-ion batteries is their thermal management. Different thermal management systems were proposed to address this issue. This study experimentally examined the cooling of battery packs by using liquid-vapor phase change in direct contact with the cells. The impact of refrigerant height, ambient temperature, and pack compartment pressure on maximum temperature was assessed. The results showed that increasing refrigerant height and decreasing compartment pressure lowered the pack's maximum temperature, while increasing ambient temperature raised it. Additionally, it was found that the phase change of the refrigerant played a role in increasing the pack temperature close to the refrigerant boiling point.

JOURNAL OF ENERGY STORAGE (2023)

Article Thermodynamics

A parametric study of a hybrid battery thermal management system that couples PCM with wavy microchannel cold plate

Yonghao Wang et al.

Summary: In this paper, an innovative system called hybrid wavy microchannel cold plate (HWMCP) using PCM and wavy microchannel cold plate (WMCP) is designed and analyzed. The heat storage capacity of HWMCP increases with the increase of PCM thickness and height ratio h1/h2. The cooling capacity of HWMCP is slightly improved when the liquid microchannels grow in number. Compared with unidirectional flow, cross flow significantly reduces the maximum temperature of the battery and improves the utilization rate of PCM.

APPLIED THERMAL ENGINEERING (2023)

Review Thermodynamics

An up-to-date review on the design improvement and optimization of the liquid-cooling battery thermal management system for electric vehicles

Gang Zhao et al.

Summary: This paper reviews the effectiveness and efficiency of the liquid-cooling battery thermal management system (BTMS) for electric vehicles. It highlights the recent research on design improvements and optimization for the liquid-cooling BTMSs, emphasizing the most effective approaches to better cooling performance. The paper also discusses the current gaps and future directions in the research of liquid-cooling BTMS designs for the EV industry.

APPLIED THERMAL ENGINEERING (2023)

Article Thermodynamics

Novel concept design of low energy hybrid battery thermal management system using PCM and multistage Tesla valve liquid cooling

Yiwei Fan et al.

Summary: To challenge the performance of high energy density lithium-ion batteries at different temperatures, a battery thermal management system combining multi-stage tesla valve liquid cooling and phase change material is proposed. Experimental verification and numerical studies are conducted to optimize the system's performance. The results show that the use of phase change material significantly improves the cooling performance and reduces energy consumption compared to conventional systems. The system also effectively maintains battery warmth during cold stops, reducing the energy required for battery heating after short-term parking.

APPLIED THERMAL ENGINEERING (2023)

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Experimental study on immersion phase change cooling of lithium-ion batteries based on R1233ZD(E)/ethanol mixed refrigerant

Yan-Feng Wang et al.

Summary: This study investigated the immersion phase change cooling characteristics of R1233ZD(E)/Ethanol mixed refrigerant in a staggered battery module to improve heat dissipation and temperature uniformity for electric vehicle lithium-ion battery. The analysis considered different discharge rates, filling volume fractions, and inlet volume flow rates. Results show that the heat generation of the battery is influenced by the operating current and decreases with the decrease of the output power. Mixing R1233ZD(E) into ethanol effectively enhances wall boiling heat transfer and improves battery module temperature uniformity. However, high volume fractions of R1233ZD(E) result in departure from nucleate boiling regime, affecting heat transfer and temperature quantities.

APPLIED THERMAL ENGINEERING (2023)

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Preparation and Characterization of n-Octadecane@SiO2/GO and n-Octadecane@SiO2/Ag Nanoencapsulated Phase Change Material for Immersion Cooling of Li-Ion Battery

Jianhao Gu et al.

Summary: Nanoencapsulated phase change materials (NePCMs) with a paraffin core and silica shell were synthesized using sol-gel method. The samples were characterized and then used as coolants in the immersion cooling of a simulative battery. The doped sample with Ag on the shell at a core-to-shell ratio of 1:1 exhibited the best performance, with increased thermal conductivity and reduced supercooling degree. The average temperature of the battery cooled with nanocapsule slurries decreased significantly compared to pure insulation oil as the coolant. These nanocapsules have great potential in battery immersion cooling.

ENERGIES (2023)

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A compact and lightweight hybrid liquid cooling system coupling with Z-type cold plates and PCM composite for battery thermal management

Huizhu Yang et al.

Summary: In this study, a hybrid liquid cold plate design with Z-type parallel cooling channel and PCM/aluminum foam composite, along with a delayed cooling strategy, is proposed for battery thermal management systems. Nine different cold plate designs, including one baseline cold plate without PCM composite and eight hybrid cold plates with PCM composite, are systematically analyzed to demonstrate the superior cooling performance of the proposed design. The results show that the optimum hybrid cold plate design can achieve a significant reduction in the total pumping power while maintaining the same cooling performance compared to the baseline cold plate at different battery discharge rates.

ENERGY (2023)

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Hybrid single-phase immersion cooling structure for battery thermal management under fast-charging conditions

Hongseok Choi et al.

Summary: In this study, a hybrid immersion cooling structure is proposed and investigated for high-energy-density battery thermal management. The performance of the design is evaluated by varying key parameters, and a structure with one pass partition and graphite fins is found to have the best performance in terms of weight and temperature uniformity.

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Algorithm-driven optimization of lithium-ion battery thermal modeling

Zeyu Sun et al.

Summary: This study provides a high-precision and low-computational cost approach for heat generation calculation of lithium-ion batteries, which contributes to the development of battery thermal management systems.

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Experimental studies of reciprocating liquid immersion cooling for 18650 lithium-ion battery under fast charging conditions

Yang Li et al.

Summary: The reciprocating liquid immersion cooling method is proposed and tested for cooling cylindrical lithium-ion batteries (LIBs) during fast charging. Experimental results demonstrate that the reciprocating liquid immersion cooling outperforms natural convection, as it not only precisely controls the cell temperature during fast charging but also improves temperature uniformity. Additionally, the reciprocating system enables rapid cooling of the battery during resting, achieving asymmetric control of high-temperature charging and room temperature discharging. The study also explores the effects of different charging rates and protocols, as well as observes the liquid-gas phase transition phenomenon using high-speed photography.

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Effect analysis on integration efficiency and safety performance of a battery thermal management system based on direct contact liquid cooling

Shangquan Wu et al.

Summary: This study has successfully developed an oil-immersed battery system with high integration ratio and excellent safety, providing a feasible solution for the demand of high safety and high specific energy of electric vehicle battery systems.

APPLIED THERMAL ENGINEERING (2022)

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Feasibility study of a novel oil-immersed battery cooling system: Experiments and theoretical analysis

Jiahao Liu et al.

Summary: This paper investigates the feasibility of using transformer oil to develop an oil-immersed battery thermal management system. Through model-scale experiments and theoretical analysis, it is found that stationary transformer oil can effectively cool the battery and reduce temperature inhomogeneity. Increasing oil flow rate can improve the cooling performance, but excessive flow rate will increase power consumption.

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A review on thermal management of lithium-ion batteries for electric vehicles

Xinghui Zhang et al.

Summary: Electric vehicles powered by lithium-ion batteries have great potential in alleviating energy and environmental issues, but temperature management is crucial for their development and propagation. Both high and low temperature environments can negatively impact battery performance and safety, requiring proper handling.

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Recent progress in lithium-ion battery thermal management for a wide range of temperature and abuse conditions

Z. Y. Jiang et al.

Summary: This review summarizes the latest research progress on thermal management of lithium-ion batteries under high temperature, sub-zero temperature, and abuse conditions. It discusses the heat generation mechanisms, different cooling methods, battery heating methods, and improvements in battery safety under abuse conditions.

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Thermal performance of a liquid-immersed battery thermal management system for lithium-ion pouch batteries

Haitao Wang et al.

Summary: A novel liquid-immersed battery thermal management system (BTMS) was designed to address the issues of high temperature rise and large temperature difference in lithium-ion pouch batteries. Experimental results showed that proper immersion depth and flow rate could greatly improve the thermal management performance, effectively reducing the temperature and temperature difference of the batteries.

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Connecting battery technologies for electric vehicles from battery materials to management

Gang Zhao et al.

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Yuxin Zhou et al.

Summary: In this paper, a battery thermal management system with immersion cooling was designed by immersing lithium-ion cells in a non-conductive coolant. It was found that immersion cooling can reduce the maximum temperature of the cell but increase the maximum temperature difference. The effects of coolant flow rate, viscosity, specific heat capacity, and thermal conductivity on cooling performance were further investigated.

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Validation of a data-driven fast numerical model to simulate the immersion cooling of a lithium-ion battery pack

Elie Solai et al.

Summary: This study presents a data-driven numerical method for evaluating the immersion cooling behavior of Lithium-ion battery packs. Experimental validation and model calibration are performed, and the learned distributions and numerical model are used to design a system for realistic racing car operation, with further sensitivity analysis.

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Numerical analysis of single-phase liquid immersion cooling for lithium-ion battery thermal management using different dielectric fluids

K. Jithin et al.

Summary: Lithium-ion batteries are commonly used in electric vehicles, and direct liquid cooling with dielectric fluids can effectively cool the batteries while consuming less power. Different dielectric fluids exhibit varying cooling performance and power consumption characteristics.

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Charlotte Roe et al.

Summary: Battery thermal management systems are critical for high-performance electric vehicles. Immersion cooling can significantly increase heat transfer rate, but system complexity and fluid stability should be considered.

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Junjie Wang et al.

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Patcharin Saechan et al.

Summary: Lithium-ion batteries are widely used in Electric Vehicles, and efficient thermal management is crucial for maintaining their performance. This study focuses on numerical investigation of an air cooling system, optimizing parameters to enhance cooling performance and ensure temperature stability in the battery pack.

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Srinivas Singirikonda et al.

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Experimental studies of liquid immersion cooling for 18650 lithium-ion battery under different discharging conditions

Yang Li et al.

Summary: This study examines and discusses the use of fluorinated liquid immersion cooling as a new cooling scheme for the 18650 lithium-ion battery. The results demonstrate that immersion cooling is more effective than forced air cooling in cooling the battery under various conditions, with temperature control within a lower range.

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Rekabra Youssef et al.

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A model-scale experimental and theoretical study on a mineral oil-immersed battery cooling system

Jiahao Liu et al.

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Summary: Lithium-ion batteries are widely used for energy storage due to their high energy density, efficiency, capacity, and long-life cycle. However, abnormal temperature increment in the batteries can lead to performance degradation and safety issues. Therefore, an appropriate battery thermal management system is required to reduce the maximum temperature of the battery. This article provides a comprehensive review of recent research on external thermal management strategies for lithium-ion batteries, aiming to enhance understanding of key technologies and provide practical guidelines for their application.

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Parametric Optimisation of a Direct Liquid Cooling-Based Prototype for Electric Vehicles Focused on Pouch-Type Battery Cells

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