Thermal management system

In a thermal management system, a low-temperature side heat medium circuit includes a first circuit, a second circuit, a coupling part, and a flow rate adjustment part. The first circuit includes a first heat exchange unit, and is configured such that a heat medium can circulate via a chiller and the first heat exchange unit. The second circuit includes a second heat exchange unit, and is configured such that the heat medium can circulate via the second heat exchange unit and a heat medium pump. A controller controls an operation of the flow rate adjustment part and adjusts the flow rate of the heat medium in the coupling part, so as to make a temperature zone of the heat medium flowing through the first circuit and a temperature zone of the heat medium flowing through the second circuit have respective determined values.