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Development of an Empirical Model for the Prediction of Thermoelectric Behavior of Lithium Iron Phosphate Pouch Cell Under Different Discharge Rates

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Recent Advances in Thermal Sciences and Engineering

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

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Abstract

Broader adoption of electric vehicles is still facing barriers. When subjected to larger electric current, batteries cause high internal heat generation and thus are subjected to high temperature, impacting their performance, life and safety. Thermal management systems are in place to control the battery temperature in such scenarios. They should be optimized for the current demand; since they exert an additional burden on the overall system. This paper experimentally investigates the effect of varying electric current on the battery’s thermal and electrical performance. Doubling the discharge rate is found to more than double the temperature rise and quadruple the temperature rise rate. The transient voltage profile drops, and hence energy delivered decreases by 3%. This paper proposes an empirical model for gaging the battery’s thermal and electrical performance sensitivity toward varying discharge rates and optimizing the thermal management system accordingly. The inputs for the model are derived from the galvanostatic discharge test, and the model validation is carried out from a constant-current discharge test. The establishment of the model provides a promising way of optimizing battery thermal management systems considering their impact on the overall powertrain’s performance, life, safety and cost.

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Abbreviations

BMS:

Battery management system

CC:

Constant current

DoD:

Depth of discharge

EV:

Electric vehicle

HEV:

Hybrid electric vehicles

LFP:

Lithium iron phosphate

OCV:

Open-circuit voltage

PHEVs:

Plug-in hybrid electric vehicles

SEI:

Solid electrolyte interface

A :

Surface area m2

C :

Specific heat capacity [J/kg.K]

DoD :

Depth of discharge –

h :

Convective coefficient W/m2K

I:

Discharge current A

m:

Mass of the cell kg

η:

Overpotential mV

QT:

Total theoretical cell capacity Ah

q gen :

Heat generated per second W

q sink :

Heat removed per second W

T :

Temperature K

Tref:

Reference temperature, 298 K K

U :

Open-circuit voltage [kg⋅m2⋅s−3⋅A−1]

Y :

Conductance [kg−1⋅m-2⋅s3⋅A2]

References

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Acknowledgements

Funding

This work was supported by the All India Council for Technical Education (AICTE), India. [Grant number: 8-23/RIFD/RPS-NDF/Policy-1/2018-19].

Conflicts of Interest/Competing Interests

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Authors and Affiliations

  1. College of Engineering Pune, Pune, India

    Indraneel Naik, Pravin Nemade & Milankumar Nandgaonkar

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  1. Indraneel Naik
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  2. Pravin Nemade
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  3. Milankumar Nandgaonkar
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Corresponding author

Correspondence to Indraneel Naik .

Editor information

Editors and Affiliations

  1. Department of Mechanical Engineering, S. V. National Institute of Technology, Surat, India

    Hemant B. Mehta

  2. Department of Mechanical Engineering, S. V. National Institute of Technology, Surat, India

    Manish K. Rathod

  3. Department of Optimization of Chemical and Biotechnological Equipment, Saint Petersburg State Institute of Technology, Saint Petersburg, Russia

    Rufat Abiev

  4. Department of Mechanical Engineering, Kocaeli University, Kocaeli, Türkiye

    Müslüm Arıcı

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Naik, I., Nemade, P., Nandgaonkar, M. (2023). Development of an Empirical Model for the Prediction of Thermoelectric Behavior of Lithium Iron Phosphate Pouch Cell Under Different Discharge Rates. In: Mehta, H.B., Rathod, M.K., Abiev, R., Arıcı, M. (eds) Recent Advances in Thermal Sciences and Engineering. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-19-7214-0_23

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  • DOI: https://doi.org/10.1007/978-981-19-7214-0_23

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  • Online ISBN: 978-981-19-7214-0

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