Peukert Generalized Equations Applicability with Due Consideration of Internal Resistance of Automotive-grade Lithium-ion Batteries for their Capacity Evaluation | Chapter 10 | Recent Progress in Science and Technology Vol. 6

 In this paper, the relevance of the Peukert equation and allure generalizations was investigated for ability evaluation of the automotive-grade lithium-ion batteries. It is confirmed that the classical Peukert equating is applicable inside the range of the discharge currents from 0.2Cn to 2Cn (Cn is the nominal artillery capacity). As a rule, the operating currents of many automotive-grade lithium-ion batteries are accurately within this range of the discharge currents. That is reason, successfully, the chaste Peukert equation is secondhand in many analytical models grown for these batteries. The generalized Peukert equating C = Cm/(1+(i/i0)n) is applicable inside the discharge currents range from zero to nearly 10Cn. All kinds of the operating discharge currents (including two together very small one and powerful temporary bursts) fall into this discharge currents range. The changed Peukert equation C = Cm(1-i/i1)/((1-i/i1)+(i/i0)n) is appropriate at any discharge currents. This equating takes into account the batteries’ internal fighting and has the smallest wrong of the experimental dossier approximation. That is reason the discussed changed Peukert equation is most favored for use in analytical models of the automotive-grade lithium-ion batteries. The paper shows that all the limits of the generalized Peukert equatings have the clear electrochemical meaning opposite to the classical Peukert equating, where all the limits are just empirical limit.

Author(s) Details:

Nataliya N. Yazvinskaya,
Don State Technical University, 344000 Rostov-on-Don, Rostov Region, Russia.

Mikhail S. Lipkin,
Platov South-Russian State Polytechnic University, 346428, Novocherkassk, Rostov region, Russia.

Nikolay E. Galushkin,
Laboratory of Electrochemical and Hydrogen Energy, Don State Technical University, 346500 Shakhty, Rostov Region, Russia.

Dmitriy N. Galushkin,
Laboratory of Electrochemical and Hydrogen Energy, Don State Technical University, 346500 Shakhty, Rostov Region, Russia.

Please see the link here: https://stm.bookpi.org/RPST-V6/article/view/9876