Modeling the Reliability of an Electric Car Battery While Changing Its Charging and Discharge Characteristics

Abstract

first_pagesettingsOrder Article Reprints Open AccessArticle Modeling the Reliability of an Electric Car Battery While Changing Its Charging and Discharge Characteristics by Nikita V. Martyushev 1,*ORCID,Boris V. Malozyomov 2ORCID,Anton Y. Demin 1,Alexander V. Pogrebnoy 1,Egor A. Efremenkov 3ORCID,Denis V. Valuev 4ORCID andAleksandr E. Boltrushevich 1 1 Department of Information Technology, Tomsk Polytechnic University, 634050 Tomsk, Russia 2 Department of Electrotechnical Complexes, Novosibirsk State Technical University, 630073 Novosibirsk, Russia 3 Department of Mechanical Engineering, Tomsk Polytechnic University, 634050 Tomsk, Russia 4 Yurga Technological Institute (Branch), Tomsk Polytechnic University, 652055 Yurga, Russia * Author to whom correspondence should be addressed. Mathematics 2025, 13(11), 1832; https://doi.org/10.3390/math13111832 Submission received: 7 May 2025 / Revised: 25 May 2025 / Accepted: 28 May 2025 / Published: 30 May 2025 (This article belongs to the Special Issue Mathematical Models for Fault Detection and Diagnosis) Downloadkeyboard_arrow_down Browse Figures Versions Notes Abstract The reliable operation of current collectors is the most important factor in the efficiency and service life of electric vehicles. This article presents a study devoted to modeling the impact of operating modes on the reliability and durability of the accumulator battery of an electric bus. The purpose of this study is to determine the optimal modes of operation of the battery, which provide maximum service life while maintaining the operational efficiency of the vehicle. The developed simulation model considers the relationship between the thermal and electrical characteristics of the battery, as well as the process of its aging under the influence of various factors, including temperature, depth of discharge and charging/discharging modes. The work provides an assessment of the impact of various operating scenarios, including the charging modes typical of urban routes, on the loss of battery capacity. Using this model, it was established and experimentally confirmed that the greatest decrease in battery life occurs at a high level of battery charge. The best operating conditions range from 10 to 60%. The charge-discharge current should not exceed the nominal current, since an increase in the current level to 2C leads to a decrease in the resource by 30%, and an increase of up to 4C results in a decrease of 47%. The proposed model allow for the determination of the optimal ranges of the state of charge and temperature modes of battery operation, which ensure maximum service life while maintaining the efficiency of the electric bus on the specified routes