Thermal management system, vehicle including the same, and control method for thermal management circuit
AssigneeToyota Jidosha Kabushiki Kaisha
InventorRyo MICHIKAWAUCHI
Life of this patent
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Abstract
A thermal management system includes a five-way valve configured to switch a first circuit mode in which a chiller and a battery are thermally connected and a second circuit mode in which the chiller and an LT radiator are thermally connected, and an ECU configured to control a compressor based on a chiller temperature and a radiator temperature. The ECU is configured to, in a case where switching between the first circuit mode and the second circuit mode is performed by controlling the five-way valve during a heating operation of a refrigeration cycle, control the compressor to reduce a temperature difference between the chiller temperature and the radiator temperature prior to the switching.
Claims16
A thermal management system comprising:
- a battery through which a heat medium flows;
- a radiator through which the heat medium flows;
- a refrigeration cycle through which a refrigerant flows;
- a chiller configured to exchange heat between the heat medium and the refrigerant;
- and
- a switching valve configured to switch a first circuit mode and a second circuit mode, wherein
- the first circuit mode is a mode in which the chiller is thermally connected to the battery,
- the second circuit mode is a mode in which the chiller is thermally disconnected from the battery and is thermally connected to the radiator,
- the thermal management system includes:
- a first temperature sensor configured to detect a chiller temperature that is a temperature of the refrigerant flowing through the chiller;
- a second temperature sensor configured to detect a radiator temperature that is a temperature of the heat medium flowing through the radiator;
- a temperature adjustment device configured to adjust the temperature of one of the heat medium and the refrigerant;
- and
- a control device configured to control the temperature adjustment device based on the chiller temperature and the radiator temperature, and
- the control device is configured to, in a case where switching between the first circuit mode and the second circuit mode is performed by controlling the switching valve during a heating operation of the refrigeration cycle, control the temperature adjustment device to reduce a temperature difference between the chiller temperature and the radiator temperature prior to the switching.
A control method for a thermal management circuit,
- the thermal management circuit including:
- a battery through which a heat medium flows;
- a radiator through which the heat medium flows;
- a refrigeration cycle through which a refrigerant flows;
- a chiller configured to exchange heat between the heat medium and the refrigerant;
- a switching valve configured to switch a first circuit mode and a second circuit mode;
- and
- a temperature adjustment device configured to adjust a temperature of one of the heat medium and the refrigerant,
- the first circuit mode being a mode in which the chiller is thermally connected to the battery,
- the second circuit mode being a mode in which the chiller is thermally disconnected from the battery and is thermally connected to the radiator,
- the control method comprising:
- a step of detecting a chiller temperature that is a temperature of the refrigerant flowing through the chiller;
- a step of detecting a radiator temperature that is a temperature of the heat medium flowing through the radiator;
- and
- a step of controlling the temperature adjustment device based on the chiller temperature and the radiator temperature, wherein
- the step of controlling includes a step of controlling, in a case where switching between the first circuit mode and the second circuit mode is performed by controlling the switching valve during a heating operation of the refrigeration cycle, the temperature adjustment device to reduce a temperature difference between the chiller temperature and the radiator temperature prior to the switching.
Dependencies are inferred from the claim text.