A laboratory method for assessing the ability of external diagnostic signals to capture hidden critical states during electric vehicle battery charging

Karimkhodjaev , Nazirjon, Ismatov , Biloldin

Techscience.uz - техника фанлари долзарб масалалри · 2026-yil

Annotatsiya

Terminal voltage, current, and surface temperature monitored by electric vehicle battery management systems (BMS) do not directly measure the electrochemical and thermal states within a cell. This paper proposes a laboratory method for assessing the ability of external diagnostic signals to capture internal reference events through comparison with internal measurements. A reference electrode (RE) is used to monitor the electrochemical state, while internal and surface thermocouples are used to assess the thermal state. The method comprises data acquisition, time synchronization, preliminary screening, diagnostic decision-making, and the selection of practical actions. Temporal coverage is evaluated using the difference between the time at which an external criterion is triggered and the time at which an internal reference event is recorded. The outcomes are classified as early or simultaneous detection, delayed detection, and missed detection. In a three-cycle experiment conducted on a 1 Ah lithium-ion pouch cell at 25 °C and a charging rate of approximately 0.33C, the selected terminal voltage thresholds were reached after the internal reference event. In a separate experiment on a prismatic cell, the difference between internal and surface temperatures increased with charging current. These findings demonstrate the temporal limitations of the selected external criteria and provide a basis for laboratory evaluation of BMS diagnostic rules. The proposed thresholds are screening criteria specific to the test conditions. Before their application in service diagnostics, further validation across different cells and charging regimes is required, including an assessment of false alarms.

Maqola ma’lumotlari
MualliflarKarimkhodjaev , Nazirjon, Ismatov , Biloldin
JurnalTechscience.uz - техника фанлари долзарб масалалри
NashriyotЖиззах политехника институти
ISSN3030-3702, 3030-3702
Nashr sanasi2026-10-01
Jild4
Betlar91-99
TilIngliz
Ilmiy sohaTexnika
DOI10.47390/ts-v4is/4y2026n11
Indeksga qo‘shilgan2026-10-02

DOI: 10.47390/ts-v4is/4y2026n11 · Maqolaning asl sahifasi

Kalit so‘zlar

electric vehicle, lithium-ion battery, hidden critical state, reference electrode, terminal voltage, internal and surface temperatures, battery management system, diagnostic delay, laboratory validation., elektromobil, litiy-ion batareya, yashirin kritik holat, reference electrode, terminal kuchlanish, sirt harorati, ichki harorat, BMS diagnostikasi, amaliy validatsiya, tez zaryadlash.

Ilmiy soha

Texnika

Iqtibos keltirish

APAKarimkhodjaev , Nazirjon, & Ismatov , Biloldin (2026). A LABORATORY METHOD FOR ASSESSING THE ABILITY OF EXTERNAL DIAGNOSTIC SIGNALS TO CAPTURE HIDDEN CRITICAL STATES DURING ELECTRIC VEHICLE BATTERY CHARGING. Techscience.uz - техника фанлари долзарб масалалри, 4, 91-99. https://doi.org/10.47390/ts-v4is/4y2026n11
GOST (OAK)Karimkhodjaev , Nazirjon, Ismatov , Biloldin A LABORATORY METHOD FOR ASSESSING THE ABILITY OF EXTERNAL DIAGNOSTIC SIGNALS TO CAPTURE HIDDEN CRITICAL STATES DURING ELECTRIC VEHICLE BATTERY CHARGING // Techscience.uz - техника фанлари долзарб масалалри. – 2026. – T. 4. – P. 91-99. – DOI: 10.47390/ts-v4is/4y2026n11.
MLAKarimkhodjaev , Nazirjon, and Ismatov , Biloldin. “A LABORATORY METHOD FOR ASSESSING THE ABILITY OF EXTERNAL DIAGNOSTIC SIGNALS TO CAPTURE HIDDEN CRITICAL STATES DURING ELECTRIC VEHICLE BATTERY CHARGING.” Techscience.uz - техника фанлари долзарб масалалри, 4, 91-99, 2026. https://doi.org/10.47390/ts-v4is/4y2026n11
ChicagoKarimkhodjaev , Nazirjon, and Ismatov , Biloldin. “A LABORATORY METHOD FOR ASSESSING THE ABILITY OF EXTERNAL DIAGNOSTIC SIGNALS TO CAPTURE HIDDEN CRITICAL STATES DURING ELECTRIC VEHICLE BATTERY CHARGING.” Techscience.uz - техника фанлари долзарб масалалри, 4, 91-99 (2026). https://doi.org/10.47390/ts-v4is/4y2026n11
HarvardKarimkhodjaev , Nazirjon, and Ismatov , Biloldin (2026) ‘A LABORATORY METHOD FOR ASSESSING THE ABILITY OF EXTERNAL DIAGNOSTIC SIGNALS TO CAPTURE HIDDEN CRITICAL STATES DURING ELECTRIC VEHICLE BATTERY CHARGING’, Techscience.uz - техника фанлари долзарб масалалри, 4, 91-99. https://doi.org/10.47390/ts-v4is/4y2026n11
BibTeX
@article{karimkhodjaevnazirjon2026,
  title = {A LABORATORY METHOD FOR ASSESSING THE ABILITY OF EXTERNAL DIAGNOSTIC SIGNALS TO CAPTURE HIDDEN CRITICAL STATES DURING ELECTRIC VEHICLE BATTERY CHARGING},
  author = {Karimkhodjaev , Nazirjon and Ismatov , Biloldin},
  journal = {Techscience.uz - техника фанлари долзарб масалалри},
  year = {2026},
  volume = {4},
  pages = {91-99},
  doi = {10.47390/ts-v4is/4y2026n11},
  url = {https://doi.org/10.47390/ts-v4is/4y2026n11}
}

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