Coupled Electro-Chemical and Thermal Modeling for Cylindrical Lithium-Ion Batteries

Kumar, Ravindra; Chavan, Sandip

doi:10.4271/2021-26-0156

Cited by 4 publications

(3 citation statements)

References 12 publications

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“…Based on the minimum error in temperature calculation during the complete duty cycle and minimum computation time, Euler's numerical method was finalized and used to calculate the temperature of the battery at different instances during the charge and discharge cycles. 7 The temperature distribution by solving the Eq. 4 using Euler's numerical method can be expressed in the following form: Where superscript (t + 1) and (t) denote the values of parameters at time (t + 1) and time (t) respectively.…”

Section: Numerical Techniquementioning

confidence: 99%

Thermal Investigation of Cylindrical Lithium-ion Batteries for Different Loading using Experimental and Numerical Techniques

Kumar

Chavan²

2022

J. Electrochem. Soc.

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With growing concern over climate change due to automotive emissions and fossil fuel depletion, electric vehicles (EVs) have gained more interest as a mode of transportation. Mostly, lithium-ion batteries are being used as an energy storage system in EVs. Temperature plays a major role in lithium-ion battery performance, degradation, and safety. Thermal investigation of cylindrical lithium-ion batteries of different chemistry and shape factors (18650 NMC and 21700 NCA) is conducted for different charging/discharging rates (0.5C, 1C, 1.5C) and surrounding temperatures (26°C and 45°C) using numerical and experimental techniques. The numerical technique involves the determination of the surface temperature of the battery by solving the energy balance equation using a suitable numerical method. The numerical technique proposed in this study is validated using the experimental technique and can predict the temperature with at least 90% accuracy during the entire charging and discharging cycle from a lower to higher loading rate and different surrounding temperatures. The impact of different battery internal and external parameters on battery temperature is carried out using validated numerical technique. Thermal investigations conducted in this research can help in deciding the operating strategies of the battery management system and further in designing the proper thermal management system.

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Section: Numerical Techniquementioning

confidence: 99%

Thermal Investigation of Cylindrical Lithium-ion Batteries for Different Loading using Experimental and Numerical Techniques

Kumar

Chavan²

2022

J. Electrochem. Soc.

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“…In this paper for measuring the temperature at different charging and discharging cycles using Eq. ( 4), Euler's formula is used [20,21]. Eq.…”

Section: Numerical Investigationmentioning

confidence: 99%

Numerical and Experimental Investigation of Thermal Behaviour for Fast Charging and Discharging of Various 18650 Lithium Batteries of Electric Vehicles

Kumar¹,

Chavan²

2022

IJHT

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Fast charging and discharging are keen focus areas of electric vehicles (EVs) in order to reduce vehicle down time and support the variable load requirement. In EVs, mainly lithium batteries with various chemistry such as NCA (nickel cobalt aluminum oxides), LTO (lithium titanate oxide), LFP (lithium iron phosphate), LNO (lithium nickel oxide) and NMC (nickel manganese cobalt oxides) are used as energy storage system. Performance of lithium batteries varies with the chemistry and temperature of batteries along with surrounding conditions. More heat is generated during fast charging and discharging of batteries which lead to high temperature rise and further impact the performance, life and safety of batteries. Thus, it’s essential to study the thermal behaviour for fast charging and discharging of various lithium batteries to provide desired thermal management system for safety and better performance. In this paper, the thermal characteristics of various 18650 lithium batteries including NCA, NMC and LFP are investigated experimentally and numerically from slow charging and discharging loading rate of 0.5C to fast charging and discharging loading rates of 1.5C and 2.5C at different surrounding temperature of 27°C and 45°C. In the numerical investigation, the internal resistance of the batteries is first measured experimentally at various SOCs and battery temperatures, and then the battery surface temperature is determined using an appropriate numerical method for solving the energy balance equation. From slow to fast loading rates at varying ambient temperatures, the numerical study approach presented in this work estimates the battery surface temperature with at least 90% accuracy for the whole duration of the load cycle. The thermal assessment of NCA, NMC, and LFP batteries in this work can help to determine battery management system operating strategies and, ultimately, to develop an appropriate thermal management system.

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“…[4]. Euler's numerical method is used to calculate the temperature of battery at different instance during charge and discharge cycle (7). Temperature distribution by solving the Eq.…”

Section: Numerical Techniquementioning

confidence: 99%

Investigation of Thermal Behavior of Cylindrical Lithium-Ion Batteries for Electric Vehicle

Kumar¹,

Chavan²

2022

ECS Trans.

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With growing concerns over climate change due to automotive emissions, fossil fuel depletion, and the increasing price of crude oil, electric vehicles have gained more interest as a mode of transportation. Various electric vehicles have been developed in recent years, including pure electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (PHEVs). One of the keen focus area in the ongoing development of EVs is their energy storage systems. Mostly lithium-ion batteries are being used as an energy storage system in EVs. Various complicated reaction occurs during charging/discharging of batteries and the thermal behavior of the batteries are coupled to these reactions. Electrochemical reactions affect the heat generation rate, and higher temperatures further increase the speed of the electrochemical reactions. Adverse operating temperatures can impact battery performance, degradation, and safety. Hence it is become very important to investigate the thermal behavior of the lithium-ion batteries. Thermal investigation of cylindrical lithium-ion batteries of different chemistry and shape factor is conducted for different charging/discharging rate and atmospheric conditions using numerical technique. The numerical technique includes the determination of surface temperature of battery by solving the energy balance equation using suitable numerical method. The accuracy of numerical techniques is validated using the experimental techniques. Thermal investigation conducted in this research can help in deciding the operating strategies of battery management system and further in designing the proper thermal management system.

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Coupled Electro-Chemical and Thermal Modeling for Cylindrical Lithium-Ion Batteries

Cited by 4 publications

References 12 publications

Thermal Investigation of Cylindrical Lithium-ion Batteries for Different Loading using Experimental and Numerical Techniques

Thermal Investigation of Cylindrical Lithium-ion Batteries for Different Loading using Experimental and Numerical Techniques

Numerical and Experimental Investigation of Thermal Behaviour for Fast Charging and Discharging of Various 18650 Lithium Batteries of Electric Vehicles

Investigation of Thermal Behavior of Cylindrical Lithium-Ion Batteries for Electric Vehicle

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