Powertrain, method for controlling cooling of powertrain, and vehicle
AssigneeHuawei Digital Power Technologies Co., Ltd.
InventorsHongbing Liu, Jingzhou Wei, Yi Cao
Life of this patent
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Abstract
A powertrain includes a reservoir configured to store coolant; a first drive motor, where the first drive motor includes a first stator and a first rotor; a second drive motor, where the second drive motor includes a second stator and a second rotor; a first pump and a second pump, where an inlet of the first pump is coupled to the reservoir, and an inlet of the second pump is coupled to the reservoir; a heat exchanger, where the heat exchanger is coupled to the first pump; a first flow path, where the first flow path is coupled to an outlet of the first pump, and the first flow path is used to supply the coolant to the first stator and the second stator through the heat exchanger.
Claims15
A powertrain comprising:
- a reservoir configured to store coolant;
- a first drive motor comprising:
- a first stator;
- and
- a first rotor;
- a second drive motor comprising:
- a second stator;
- and
- a second rotor;
- a first pump comprising:
- a first inlet coupled to the reservoir;
- and
- a first outlet;
- a second pump comprising:
- a second inlet coupled to the reservoir;
- and
- a second outlet;
- a heat exchanger coupled to the first pump;
- a rotor bearing configured to support the first rotor and the second rotor;
- a first flow path coupled to the first outlet and configured to supply the coolant to the first stator and the second stator through the heat exchanger;
- a second flow path coupled to the second outlet and configured to supply the coolant to the first rotor and the second rotor;
- and
- a third flow path connected to the first flow path, wherein the third flow path is configured to supply the coolant to the rotor bearing.
A method for controlling cooling of a powertrain, wherein the method comprises:
- storing a coolant in a reservoir of the powertrain;
- determining a first temperature of the powertrain;
- determining a first rotational speed of a first pump of the powertrain and a second rotational speed of a second pump of the powertrain, wherein a first inlet of the first pump is coupled to the reservoir of the powertrain, and wherein a second inlet of the second pump is coupled to the reservoir;
- identifying that the first temperature is higher than a first target temperature;
- identifying that the first rotational speed is inconsistent with the second rotational speed;
- increasing, in response to identifying that the first rotational speed is inconsistent with the second rotational speed, a rotational speed of a pump that has a lower rotational speed between the first pump and the second pump;
- determining, after increasing the rotational speed of the pump that has the lower rotational speed, a second temperature of the powertrain;
- identifying that the second temperature is higher than the first target temperature;
- and
- increasing, in response to identifying that the second temperature is higher than the first target temperature, the first rotational speed and the second rotational speed.
A vehicle comprising:
- a powertrain comprising:
- a reservoir configured to store coolant;
- a first drive motor comprising:
- a first stator;
- and
- a first rotor;
- a second drive motor comprising:
- a second stator;
- and
- a second rotor;
- a first pump comprising:
- a first inlet coupled to the reservoir;
- and
- a first outlet;
- a second pump comprising:
- a second inlet coupled to the reservoir;
- and
- a second outlet;
- a heat exchanger coupled to the first pump;
- a rotor bearing configured to support the first rotor and the second rotor;
- a first flow path coupled to the first outlet and configured to supply the coolant to the first stator and the second stator through the heat exchanger;
- a second flow path coupled to the second outlet and configured to supply the coolant to the first rotor and the second rotor;
- and
- a third flow path connected to the first flow path, wherein the third flow path is configured to supply the coolant to the rotor bearing;
- and
- a drive wheel coupled to the powertrain via a transmission.
Dependencies are inferred from the claim text.