Thermal management system with heat exchanger blending valve

A thermal management system (300) and method of use are provided, the system including a heat exchanger (315), a refrigeration system (301), a coolant loop (325) thermally coupled to the heat exchanger (315), and a by-pass valve (333) that regulates the amount of coolant within the coolant loop (325) that either passes through the heat exchanger (315) or is diverted away from the heat exchanger. The coolant loop (325) is thermally coupled to the battery pack (323) of an electric vehicle.