Inclined U-shaped flat microheat pipe array configuration for cooling and heating lithium-ion battery modules in electric vehicles

Lin Liang, Yaohua Zhao, Yanhua Diao, Ruyang Ren and Heran Jing

Energy, 2021, vol. 235, issue C

Abstract: The battery thermal management system (BTMS) is important to ensure the lithium-ion battery life, performance, and safety. A novel inclined U-shaped flat microheat pipe array (FMHPA) is used for BTMS to achieve high efficiency and space-saving in this study. The thermal control performance is experimentally studied and compared with the module without FMHPAs. Results show that the equivalent thermal conductivity of the inclined U-shaped FMHPA is approximately 4350 W m−1 K−1, and plays the role of core heat transfer element. The maximum temperature and temperature difference of the module with FMHPAs are reduced by 16% and 60%, respectively, compared with those of the module without FMHPAs; FMHPAs keep the module in a suitable temperature range for most of the time in the ambient temperature of 25 °C during the 1C charge–2C discharge cycle. Moreover, the temperature difference at cell and module level are maintained within 5 °C in ambient temperature of 25 °C and 40 °C. The heating rate of the module with FMHPAs reaches 0.61 °C/min under the temperature difference of less than 5 °C; variable power heating (from large to small) will increase the temperature rise rate of the battery by 0.19 °C/min.

Keywords: Lithium-ion battery; Battery thermal management; Flat micro-heat pipe array; Cooling and heating (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (12)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:235:y:2021:i:c:s0360544221016819

DOI: 10.1016/j.energy.2021.121433

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