Thermal management system and control method for thermal management system

A thermal management system comprising:

• a thermal management circuit including a reservoir into which a thermal medium is injected, a first pump, and a second pump, and configured to allow the thermal medium to flow through the thermal management circuit;
• a processor configured to control drive of each of the first pump and the second pump, wherein
• the first pump is upstream of the second pump in a direction of flow of the thermal medium with the reservoir as a start point when the thermal management circuit is in a series connection state in which the reservoir, the first pump, and the second pump are connected in series with each other, and
• the processor is configured to drive the first pump earlier than the second pump on condition that the thermal management circuit is in the series connection state when the thermal medium is injected into the reservoir;
• a valve configured to switch the thermal management circuit between the series connection state and a non-series connection state in which the first pump and the second pump are not connected in series with each other, and to be controlled by the processor, and
• a first timer configured to measure a time since the first pump is driven, wherein:
• the processor is configured to drive each of the first pump and the second pump on condition that the thermal management circuit is switched from the non-series connection state to the series connection state by controlling the valve,
• the processor is configured to acquire information about a first predetermined time based on a time required for the thermal medium to flow from the first pump to the second pump, and
• the processor is configured to drive the second pump in response to the time measured by the first timer exceeding the first predetermined time on condition that the thermal management circuit is in the series connection state when the thermal medium is injected into the reservoir.

A thermal management system comprising:

• a thermal management circuit including a reservoir into which a thermal medium is injected, a first pump, and a second pump, and configured to allow the thermal medium to flow through the thermal management circuit;
• a processor configured to control drive of each of the first pump and the second pump, wherein
• the first pump is upstream of the second pump in a direction of flow of the thermal medium with the reservoir as a start point when the thermal management circuit is in a series connection state in which the reservoir, the first pump, and the second pump are connected in series with each other, and
• the processor is configured to drive the first pump earlier than the second pump on condition that the thermal management circuit is in the series connection state when the thermal medium is injected into the reservoir;
• a valve configured to switch the thermal management circuit between the series connection state and a non-series connection state in which the first pump and the second pump are not connected in series with each other, and to be controlled by the processor, and
• a second timer configured to measure a time since the thermal medium is injected into the reservoir, wherein:
• the processor is configured to drive each of the first pump and the second pump on condition that the thermal management circuit is switched from the non-series connection state to the series connection state by controlling the valve,
• the processor is configured to drive the first pump while the thermal medium is flowing through the first pump on condition that the thermal management circuit is in the series connection state when the thermal medium is injected into the reservoir,
• the processor is configured to acquire information about a second predetermined time based on a time required for the thermal medium to flow from the reservoir to the first pump, and
• the processor is configured to drive the first pump in response to the time measured by the second timer exceeding the second predetermined time on condition that the thermal management circuit is in the series connection state when the thermal medium is injected into the reservoir.

A thermal management system for a vehicle with a battery mounted in the vehicle, comprising:

• a thermal management circuit including a reservoir into which a thermal medium is injected, a plurality of pumps, and the battery, and configured to allow the thermal medium to flow through the thermal management circuit;
• a processor configured to control drive of each of the plurality of pumps, wherein
• the plurality of pumps include a most upstream pump most upstream in a direction of flow of the thermal medium with the reservoir as a start point when the thermal management circuit is in a series connection state in which the reservoir and the plurality of pumps are connected in series with each other, and
• the processor is configured to drive the most upstream pump first, among the plurality of pumps, on condition that the thermal management circuit is in the series connection state when the thermal medium is injected into the reservoir;
• and
• a valve configured to switch the thermal management circuit between the series connection state and a non-series connection state in which the plurality of pumps are not connected in series with each other, and to be controlled by the processor, wherein
• the processor is configured to drive each of the plurality of pumps on condition that the thermal management circuit is switched from the non-series connection state to the series connection state by controlling the valve.

A control method for a thermal management system for a vehicle with a battery mounted in the vehicle, the thermal management system including a thermal management circuit including a reservoir into which a thermal medium is injected, a first pump, a second pump, and the battery, and configured to allow the thermal medium to flow through the thermal management circuit, the first pump being upstream of the second pump with respect to the reservoir in a direction of flow of the thermal medium when the thermal management circuit is in a series connection state in which the reservoir, the first pump, and the second pump are connected in series with each other;

• and a valve configured to switch the thermal management circuit between the series connection state and a non-series connection state in which the first pump and the second pump are not connected in series with each other, the control method comprising:
• injecting the thermal medium into the reservoir on condition that the thermal management circuit is in the series connection state;
• driving the first pump earlier than the second pump when the thermal medium is injected into the reservoir in the injecting of the thermal medium;
• and
• driving each of the first pump and the second pump on condition that the thermal management circuit is switched from the non-series connection state to the series connection state by controlling the valve.