Thermal conditions of the battery cell of an electrochemical energy storage system under intense electrochemical and chemical reactions
| Parent link: | Journal of the Brazilian Society of Mechanical Sciences and Engineering.— .— New York: Springer Nature Vol. 47.— 2025.— Article number 254, 15 p. |
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| मुख्य लेखक: | |
| अन्य लेखक: | , |
| सारांश: | Title screen The energy security of many developed countries is a serious challenge these days. It is primarily due to lack of extensive and sufficient infrastructure for the actual application of electrical energy generated by intermittent generation sources (solar panels and wind generators). Energy storage systems, such as battery ones, could be a possible technological solution in this case. However, problems with fire safety and reliability of such devices have not been completely resolved yet. The analysis shows that the main problem of chemical current sources lies in the thermal runaway of battery cells of energy storage systems. Thermal runaway is associated with the self-heating of the elements of the “anode-electrolyte-cathode” system under certain operating conditions. The study presents a temperature analysis of a lead-acid cell using interrelated electrochemical and thermal models. The thermal model was based on a differential one-dimensional non-stationary heat conduction equation solved by the finite difference method using an implicit four-point difference approximation scheme. Third-order boundary conditions were set on the outer boundary of the cell. The fourth-order conditions (equality of heat flows and temperatures) were set on the boundaries between elements. The electrochemical model included two main exothermic reactions. The rate constants of the chemical and electrochemical anodic reactions of oxygen reduction were determined analytically. The representative temperatures of the internal elements of the battery were determined for the first time using a coupled heat transfer model. It has been established that the temperature difference in cross sections between the temperature of the outer surface of the battery cell case and the main cell working elements can be up to 4 °C. The contribution of exothermic reactions to the thermal runaway process was estimated. The numerical analysis has shown that thermal runaway is observed at a discharge rate of C/5, and the representative temperatures of the battery, taking into account only Joule heating, are underestimated by 1–3 °C. The main result of the study is the justification for the need to take into account electrochemical reactions when analyzing the temperature fields of battery cells Текстовый файл AM_Agreement |
| भाषा: | अंग्रेज़ी |
| प्रकाशित: |
2025
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| विषय: | |
| ऑनलाइन पहुंच: | https://doi.org/10.1007/s40430-025-05565-2 |
| स्वरूप: | इलेक्ट्रोनिक पुस्तक अध्याय |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=680714 |