U-TYPE BATTERY PACK FOR ELECTRIC VEHICLE

摘要

PURPOSE: A U-type battery pack for electric vehicle is provided to keep the temperature variance between the cells low thereby prolonging lifetime of a battery pack, and to facilitate a battery design by quantitatively calculating the ratio between the outlet area and the inlet area of the cooling duct using a mathematical equation. CONSTITUTION: A U-type battery pack for electric vehicle comprises a cooling structure where a refrigerant flowing in through a first cooling channel cools battery cells, then is discharged through a second cooling channel. The cooling structure has U-shape where an inflow direction and outflow direction are opposite. The inlet of the first cooling channel and the outlet of the second cooling channel satisfy the following chemical formula: 1.65×[outlet flux/inlet flux]^1.5 = C×[outlet area/inlet area].