Peukert Generalized Equations Applicability with Due Consideration of Internal Resistance of Automotive-Grade Lithium-Ion Batteries for Their Capacity Evaluation

Nataliya N. Yazvinskaya, Mikhail S. Lipkin, Nikolay E. Galushkin and Dmitriy N. Galushkin
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Nataliya N. Yazvinskaya: Department of Cybersecurity of Information Systems, Don State Technical University, 344000 Rostov-on-Don, Russia
Mikhail S. Lipkin: Department of Chemical Technologies, Platov South-Russian State Polytechnic University, 346428 Novocherkassk, Russia
Nikolay E. Galushkin: Laboratory of Electrochemical and Hydrogen Energy, Don State Technical University, 346500 Shakhty, Russia
Dmitriy N. Galushkin: Laboratory of Electrochemical and Hydrogen Energy, Don State Technical University, 346500 Shakhty, Russia

Energies, 2022, vol. 15, issue 8, 1-11

Abstract: In this paper, the applicability of the Peukert equation and its generalizations were investigated for capacity evaluation of automotive-grade lithium-ion batteries. It is proved that the classical Peukert equation is applicable within the range of the discharge currents from 0.2 C n to 2 C n ( C n is the nominal battery capacity). As a rule, the operating currents of many automotive-grade lithium-ion batteries are exactly within this range of the discharge currents. That is why, successfully, the classical Peukert equation is used in many analytical models developed for these batteries. The generalized Peukert equation C = C m /(1 + ( i / i 0) n ) is applicable within the discharge currents range from zero to approximately 10C n . All kinds of operating discharge currents (including both very small ones and powerful short-term bursts) fall into this discharge currents range. The modified Peukert equation C = C m (1 ? i / i 1)/((1 ? i / i 1) + ( i / i 0) n ) is applicable at any discharge currents. This equation takes into account the battery’s internal resistance and has the smallest error of experimental data approximation. That is why the discussed modified Peukert equation is most preferable for use in analytical models of automotive-grade lithium-ion batteries. The paper shows that all the parameters of the generalized Peukert equations have a clear electrochemical meaning in contrast to the classical Peukert equation, where all the parameters are just empirical constants.

Keywords: Peukert equation; lithium-ion battery; capacity; automotive-grade battery; internal resistance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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