Discharge Capacity of Energy Storages as a Function of the Discharge Current–Expanding Peukert’s equation

Nebl, Christoph; Steger, F; Schweiger, Hans−Georg

doi:10.20964/2017.06.51

Cited by 16 publications

(13 citation statements)

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“…The Peukert Equation ( 5) and its generalization (6) are used in many analytical models [9,10,33,34]. That is why problems such as the determination of the applicability of Equations ( 5)- (7) for automotive-grade lithium-ion batteries, their refinement, and the identification of the physical meaning of the parameters used in those equations are of great theoretical and practical importance.…”

Section: Discussionmentioning

confidence: 99%

“…However, the Peukert Equation ( 5) is used successfully in many mo lithium-ion batteries [9,10,33,34]. It is fundamentally important that the experimental function C(i) for the lithium-ion batteries has three absolutely different sections (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

“…However, the Peukert Equation ( 5) is used successfully in many models of lithium-ion batteries [9,10,33,34].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2022

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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 0.2Cn to 2Cn (Cn 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 = Cm/(1 + (i/i0)n) is applicable within the discharge currents range from zero to approximately 10Cn. 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 = Cm(1 − i/i1)/((1 − i/i1) + (i/i0)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.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2022

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“…Hau da, Peukert-en efektua ez da agerian geratzen, intentsitateen arteko diferentzia txikia delako. Izan ere, Peukerten efektua lege enpiriko bat da deskarga-intentsitatea eta deskargakapazitatea erlazionatzeko [33,34]. Horrela, Peukerten legeak kuantitatiboki deskribatzen du deskarga-intentsitatea handitzean deskargaturiko kapazitatea nola txikitzen den.…”

Section: Taula Nmcren Ehunekoaren Efektua Bateriaren Ezaugarri Elektr...unclassified

Bateria-multzoen simulazio elektrotermikoak: 14S5P bateria-multzo komertziala

Campillo-Robles

Veci

Igartua

et al. 2020

EKAIA

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Normalean ibilgailu elektriko txikietan erabiltzen den 14S5P bateria-multzoaren jokaera elektrotermikoa lehenengo aldiz aztertu dugu simulazio multifisikoen bidez. LMO kimikako 26650 bateriaren (3,5 Ah) jokaera elektrikoa simulatzeko eredu elektrokimikoa garatu dugu. LMOko katodoan NMC material aktiboa gehitu dugu (pisuan, % 0, % 29 eta % 59), bateriaren ezaugarri elektrikoak hobetzen direla egiaztatzeko. LMO kimikadun 26650 bateriaren beroketa simulatu dugu intentsitate altuko deskarga batean (10 A), eta tenperatura % 64 igotzen dela egiaztatu dugu. Azkenik, ohiko lan-baldintzetako korronteetan, 14S5P bateria-multzoaren tenperatura ez dela era nabarmenean handitzen frogatu dugu.

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“…However, the classical Peukert's equation is not applicable at both very small and high discharge currents. [22][23][24] This study is aimed at improvement of the classical Peukert's equation so that it would be applicable at any discharge currents.…”

mentioning

confidence: 99%

A Critical Review of Using the Peukert Equation and its Generalizations for Lithium-Ion Cells

Galushkin

Yazvinskaya

Галушкин

2020

J. Electrochem. Soc.

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In this paper, the Peukert’s equation was studied experimentally and theoretically at various discharge currents for lithium-ion cells. The classical Peukert’s equation is not applicable at small discharge currents as according to this equation, at the discharge current decrease, the capacity released by the cells tends to infinity. The generalized Peukert’s equation C = C m /(1+(i/i0)n) corresponds well to the experimental data obtained at small and middle discharge currents. However at high discharge currents, the capacity released by the lithium-ion cells drops much faster than it is predicted by the known Peukert’s equation generalizations. In this paper both experimentally and theoretically, it is proved that the reason of the sharp decrease of the cells capacity at high discharge currents is the voltage drop at cells internal resistance. Based on the obtained results, the following equation was proposed: C = C m (1−i/i1)/((1−i/i1)+i n/i0n). This equation corresponds well to the experimental data at any discharge currents, as it takes into consideration the voltage drop, caused by the cell internal resistance.

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Discharge Capacity of Energy Storages as a Function of the Discharge Current–Expanding Peukert’s equation

Cited by 16 publications

References 0 publications

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

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

Bateria-multzoen simulazio elektrotermikoak: 14S5P bateria-multzo komertziala

A Critical Review of Using the Peukert Equation and its Generalizations for Lithium-Ion Cells

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