Investigation on the Transient Thermal Performance of a Mini-Channel Cold Plate for Battery Thermal Management
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https://doi.org/10.1007/s11630-020-1280-8
Article ID: 1003-2169(2020)00-0000-00
Investigation on the Transient Thermal Performance of a Mini-Channel Cold Plate for Battery Thermal Management FANG Yidong1,2, SHEN Jiali1, ZHU Yue1, YE Fei1, LI Kang1,2*, SU Lin1,2* 1. School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China 2. Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, Shanghai 200093, China © Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract: Cold plate is an important component for a liquid battery thermal management system. In order to study the transient thermal performance of the cold plate under conditions with sharply increasing heat loads, the numerical model of a battery cold plate is established. The validation experiment shows that the error between the simulation and experiment is around 2.5% to 5%. Effects of the coolant flow rate, the increase in heat flux, and the channel number are analyzed to study the transient thermal performance of the cold plate. Results show that the average temperature of the cold plate at 540 s is lowered from 28.3°C to 26.9°C when the coolant flow rate is raised from 0.065 kg/s to 0.165 kg/s. The temperature deviation is decreased when the coolant flow rate is increased from 0.065 kg/s to 0.115 kg/s; however, it is slightly increased if the coolant flow rate is further increased. Both average temperature and temperature deviation are raised if the final heat flux is increased from 11 000 W/m2 to 16 500 W/m2, which are 2 and 3 times of the initial, respectively. In addition, increasing the channel number has slightly positive effect on the average temperature of the cold plate, while the temperature deviation is increased when the channel number is increased from 3 to 11 due to the non-uniform velocity distribution between each channel. The results of this study will be helpful during the design of cold plate for battery thermal management, especially for transient conditions with sudden rising heat loads like thermal runaway.
Keywords: battery thermal management, cold plate, transient analysis, temperature distribution, mini-channel
1. Introduction Conventional fossil-oil fueled vehicle is regarded as the major cause for the growing issue of energy crisis and environmental pollution. To confront these problems, vehicles driven by clean energy sources have been considered alternatives to gasoline or diesel fueled ones. Among all new energy vehicles, battery electric vehicle Received: Sep 06, 2019 AE: JIA Li
(BEV) has received most concern due to high energy efficiency [1–3]. The performance and safety of BEV are closely related to the status of its power battery, and one of the important factors is the temperature of the battery cell. Both temperature and thermal uniformity have great influences on the performance and the reliability of battery cell [4, 5]. The excessive high temperature will lead t
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