Numerical investigation on the usage of finned surface in lithium nickel manganese cobalt oxides batteries by using air cooling method

Abstract

In this study, a numerical thermal analysis of a lithium nickel manganese cobalt oxide prismatic battery having nominal voltage of 3.7 V and capacity of 26 Ah was performed during air cooling conditions. The effects of discharge rate (in the range of 3C-5C) and air velocity (in the range of 1-3 m s −1) on average battery temperature, maximum battery temperature, and total heat transfer rate are investigated for both flat and finned cooling surfaces. The results showed that air cooling by means of flat cooling surface is only sufficient for low discharge rate and it is necessary to use finned surfaces in order to keep battery temperature in desired operation temperature range for high discharge rate conditions. Analysis results showed that average battery temperature is reduced up to 29%, 32%, and 30% by increasing air velocity for discharge rates of 3C, 4C, and 5C with the usage of flat surface, respectively. In addition, it was seen that the average and maximum battery temperatures are reduced up to 7.9 and 8.6 K with the usage of finned cooling surface instead of flat one. The heat removed from the battery is increased 8.7 W by using finned surface at the maximum air velocity of 3 m s −1 .

Improved Thermal Management of Lithium‐Ion Battery Module through Microtexturing of Serpentine Cooling Channels

“…[27] Battery should not be more than 5 °C. [13,44] For such reasons, MTD prediction becomes crucial as it is an important indicator for comparing the effectiveness of liquid cooling channel designs. Figure 5a validates the present numerical approach, as the maximum temperature of battery module (40 LIB module) at the end of 3 C discharge rate satisfactorily matched with the published result of Xu et al [27] Figure 5b Table 3.…”

“…It is to be mentioned here that, according to most of the design standards for thermal management systems, the temperature difference between different parts of the battery surface should not be more than 5 °C. [ 13,44 ] For such reasons, MTD prediction becomes crucial as it is an important indicator for comparing the effectiveness of liquid cooling channel designs. Figure 5 a validates the present numerical approach, as the maximum temperature of battery module (40 LIB module) at the end of 3 C discharge rate satisfactorily matched with the published result of Xu et al [ 27 ] Figure 5b illustrates the temperature distribution in the considered battery module after 1200 s using the present numerical modeling approach.…”

Influence of convective heat transfer coefficients on thermal behaviour of a lithium-ion cell: a numerical study

“…There are many articles in the literature examining the thermal behaviour of LIBs. Cooling systems such as air cooling [ 8 , 9 ], liquid cooling [ 10 , 11 ], and phase change material cooling [ 12 , 13 ] have been studied to improve the thermal performance of LIB cells. Hai et al analysed the impact of air inlet velocity on the thermal behavior of the LIB cell pack [ 14 ].…”