Study on heat dissipation characteristics of lithium-ion battery of liquid cooling channnel based on bionic vein
Aiming at the heat generation characteristics of square lithium iron phosphate battery and the problem of poor temperature uniformity in parallel flow channel,three types of bionic venation channel liquid cooling plates were designed,which were type Ⅰ,type Ⅱ and type Ⅲ respectively,and a simulation model was established.The cooling performance and inlet and outlet pressure drop of type Ⅰ,type Ⅱ and type Ⅲ liquid cooling plates were compared.The effects of type Ⅲ vein bionic liquid cooling plate on cooling performance and pressure drop characteristics under different inlet flow and channel angles were studied.The results show that the maximum temperature of the whole battery pack decreases by 1.55 K and 0.44 K,and the maximum temperature difference decreases by 1.5 K and 0.5 K,respectively.The cooling effect of the type Ⅲ bionic vein cold plate is ob-viously improved,which solves the problem of parallel flow path to a certain extent.With the increase of inlet flow,the cooling effect of the liquid cooling plate is enhanced,But the corresponding inlet and outlet pressure drop also increases rapidly.When the inlet flow rate is greater than 0.1 m/s,the increasing trend of pressure drop presented by the increase of inlet flow rate is much larger than the decreasing trend of battery pack temperature change and temperature difference.The cooling performance of the cold plate and the inlet and outlet pressure drop decreases with the increase of the flow channel angle,and the inlet and outlet pressure drop decreases by 3.72 Pa when the flow channel angle changed from 15° to 45°.
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