Effect of fluid-flow direction on heat dissipation from lithium-ion batteries based on sine-function cooling plate

doi:10.19799/j.cnki.2095-4239.2023.0141

Abstract

Abstract:

The heat-dissipation performance of lithium-ion batteries is related to the shape of the flow channel on a liquid cooling plate, flow direction, discharge rate, and temperature and velocity at the inlet. Using the maximum temperature, temperature difference, temperature standard deviation, and pressure drop with respect a lithium-ion battery (LIB) as evaluation indicators, a sine-function liquid-cooled plate channel is designed herein. The influences of the frequency and amplitude of the sine function on the heat-dissipation performance of LIBs are analyzed using the COMSOL finite element software. Herein, the influence of fluid-flow direction on the maximum temperature, temperature uniformity, and temperature consistency in LIBs under different discharge rates, inlet temperatures, and inlet velocities, respectively, are discussed. The results of this study show that the sine channel with low frequency and low amplitude is beneficial for heat dissipation from LIBs. It is beneficial of the flow direction change to improve the maximum temperature, temperature uniformity and temperature consistency of LIBs. The maximum temperature and temperature difference in LIBs decreases with the increasing number of staggered flow direction. The heat-dissipation performance of LIBs is improved more by fluid-flow direction at a high discharge rate than that at a low discharge rate. When the inlet temperature is 25 ℃, the effect of the heat dissipation of lithium-ion batteries is best by the variation of the flow direction.

Key words: sine function, lithium ion batteries, flow direction of fluid, heat dissipation performance

CLC Number:

TM 911

Chengbo TANG, Yaohong SUO, Zhaokun HE. Effect of fluid-flow direction on heat dissipation from lithium-ion batteries based on sine-function cooling plate[J]. Energy Storage Science and Technology, 2023, 12(8): 2547-2555.

Figures/Tables 10

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材料特性	锂离子电池	液冷板	冷却液
密度 ρ/(kg/m³)	3000	2719	997.5
比热容C_p /[J/(kg·K)]	1005.91	871	4179
导热系数k/[W/(m·K)]	k_x =k_y =0.302，k_z =22.48	202.4	0.613
动力黏度 μ /(m/s²)	—	—	0.0007

放电倍率	A₁	A₂	A₃	A₄	A₅	A₆	A₇
1 C	4.9132×10^-16	-3.7742×10^-12	1.0679×10^-8	-1.3417×10^-5	7.6000×10^-3	-2.2208	1.7152×10⁴
2 C	1.2578×10^-13	-4.8310×10^-10	6.8347×10^-7	-4.2934×10^-4	1.2160×10^-1	-17.763	6.6623×10⁴
3 C	3.2235×10^-12	-8.2542×10^-9	7.7851×10^-6	-3.2303×10^-3	6.1570×10^-3	-59.961	1.4841×10⁵

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