Battery Thermal Management System for Vehicle

An embodiment battery thermal management system includes a first cooling circuit including a battery including battery cells, a second cooling circuit including a water pump for supplying and circulating coolant to the first cooling circuit, a coolant flow control valve connecting the first and second cooling circuits such that the coolant flows therethrough, the coolant flow control valve configured to control a flow direction of the coolant supplied to the first cooling circuit to be a first or second direction, and a controller configured to determine the flow direction of the coolant passing through the coolant flow control valve and to control an operation mode of the coolant flow control valve based on a temperature difference between a first battery cell disposed closest to a first coolant passage of the battery and a second battery cell disposed closest to a second coolant passage of the battery.