Study on low temperature discharge performance of lithium ion batteries for new energy vehicles Online publication date: Fri, 05-Jan-2024
by Yiqing Chen; Youtong Li; Moyi Xie
International Journal of Microstructure and Materials Properties (IJMMP), Vol. 17, No. 1, 2024
Abstract: To explore the operating state of lithium-ion batteries for new energy vehicles at low temperatures, this study conducted a study on the low-temperature discharge performance of lithium-ion batteries for new energy vehicles. Firstly, the establishment of a low-temperature discharge test platform is completed using a battery charging and discharging test system, a host computer, and a thermal thermometer. Then, on the basis of the established platform, a low temperature environment is set up to test the performance of lithium-ion batteries. The results show that the lower the temperature, the lower the maximum available capacity and discharge capacity of the battery. At low temperatures, the battery can reach a thermal equilibrium state, but the accumulation of polarisation in the battery is more severe, which can easily lead to deterioration of its operating conditions. Therefore, operating at low temperatures is not recommended.
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