How does a low-temperature environment affect the discharge capacity and internal resistance of lithium-ion batteries
DOI:
https://doi.org/10.61173/wjdrps98Keywords:
lithium-ion battery, 18650 cell, low-temperature discharge, internal resistance, capacity fading, Arduino experimental platformAbstract
The study investigated the performance degradation of 18650 lithium-ion batteries under low-temperature environment. A Arduino-based testing system was used to conduct comparative discharge experiments at 25℃ and approximately -10℃. The system detected and collected the real-time current, voltage and temperature data, and the discharge capacity was calculated by current integration. The results of this study reveal that low-temperature environment will greatly increase internal resistance, lower the discharge plateau and reduce capacity of a lithium-ion battery. The root cause lies in higher electrolyte viscosity and slow lithium-ion migration. The article summarizes existing optimization methods, analyzes experimental limitations, and provides practical improvement strategies for batteries used in electric vehicles and portable electronics.
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