Thermal management system, motor system and vehicle

Abstract

The utility model discloses a thermal management system, a motor system and a vehicle. In a closed loop where the water pump, the heating component and a cooling liquid flow channel of the oil-water heat exchanger are located, an arranged first valve is connected with a first connector, so that a bypass branch is established for the cooling liquid flow channel of the oil-water heat exchanger; the first valve is used for controlling the flow of cooling liquid flowing through the oil-water heat exchanger. Or in a closed loop where the oil pump, the motor and the oil liquid flow channel of the oil-water heat exchanger are located, a first valve is arranged and connected with the first connector to establish a bypass branch for the oil liquid flow channel of the oil-water heat exchanger, and the first valve is used for controlling the flow of the oil liquid flowing through the oil-water heat exchanger. The flow of cooling liquid or oil flowing through the oil-water heat exchanger can be controlled, and in the scene that the oil temperature of the motor is low, the electric drive efficiency and the cruising ability of the vehicle can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a thermal management system, a motor system and a vehicle. BACKGROUND

[0002] The endurance capability is an important parameter concerned in the development process of electric vehicles. In the current thermal management system of vehicles, the motor controller, the motor and the vehicle-mounted charging device (for example, including the vehicle-mounted charger and the DC-DC converter) are connected in series and share the same cooling circuit. The cooling liquid in the cooling circuit is driven by the water pump to flow through the motor controller, the motor (i.e. the electric motor) and the vehicle-mounted charging device in turn to take away heat, so as to realize the cooling of the devices.

[0003] Since the cooling requirements of different devices are different, the above cooling operation may cause the oil temperature of the motor to be too low, the viscosity of the oil of the motor to increase, and the electric drive efficiency to be reduced due to the oil stirring loss, which also reduces the endurance capability of the vehicle. UTILITY MODEL CONTENT

[0004] The present application discloses a thermal management system, a motor system and a vehicle, which can control the flow of the cooling liquid or the oil flowing through the oil-water heat exchanger, so that the heat is not lost when the oil temperature of the motor is low, which is beneficial to improve the electric drive efficiency and the endurance capability of the vehicle.

[0005] In a first aspect, the present application provides a thermal management system of a vehicle, which comprises a first closed loop circuit, the first closed loop circuit comprising a first water pump, a heat dissipation component, a heat generation component and an oil-water heat exchange system, the first water pump being configured to output cooling liquid to the first closed loop circuit; wherein the oil-water heat exchange system comprises a cooling liquid flow channel of an oil-water heat exchanger, a first valve and a first connecting head, the first valve, the cooling liquid flow channel of the oil-water heat exchanger and the first connecting head being connected in sequence to form a first branch, the first valve and the first connecting head being connected in sequence to form a second branch parallel to the first branch, the first valve being configured to control the flow of the cooling liquid in the first closed loop circuit through the first branch, and the oil-water heat exchanger being configured to realize heat transfer between the cooling liquid flowing through the oil-water heat exchanger and the oil of the motor.

[0006] Exemplarily, the first valve is a three-way proportional valve, and the first connecting head is a three-way valve; or the first valve comprises a first electromagnetic valve and a first three-way valve, and the first connecting head is a second three-way valve.

[0007] In the above scheme, in the first closed loop circuit in which the water pump, the heating component and the oil-water heat exchanger are located, a first valve is arranged at the inlet of the oil-water heat exchanger and a first connecting head is arranged at the outlet of the oil-water heat exchanger, and a bypass branch (i.e., a second branch) is established for the cooling liquid flow channel of the oil-water heat exchanger through the connection of the first valve and the first connecting head. The first valve can independently control the flow of the cooling liquid flowing through the oil-water heat exchanger, and the flow control of the cooling liquid flowing through the oil-water heat exchanger and the heating component is decoupled. In this way, when the oil temperature of the motor is low, the cooling liquid in the first closed loop circuit can not flow through or less flow through the oil-water heat exchanger, and the oil temperature of the motor will not be reduced, and meanwhile, the cooling of other devices (such as the heating component) in the first closed loop circuit is not affected. In addition, the self-heating of the motor can also gradually increase the oil temperature of the motor, greatly reduce the oil stirring loss, and be beneficial to improving the electric drive efficiency and the endurance of the vehicle.

[0008] In a possible implementation form of the first aspect, when the first valve is a three-way proportional valve and the first connecting head is a three-way valve, the first inlet of the first valve is configured to receive the cooling liquid in the first closed loop circuit, the first outlet of the first valve is connected with the first valve port of the first connecting head through the cooling liquid flow channel of the oil-water heat exchanger to form the first branch, the second outlet of the first valve is connected with the second valve port of the first connecting head to form the second branch, and the third valve port of the first connecting head is configured to output the cooling liquid from the first valve port of the first connecting head and the second valve port of the first connecting head.

[0009] In this embodiment, the first valve is a three-way proportional valve, and the first valve can proportionally control the flow of the cooling liquid flowing through the first branch and the second branch in the first closed loop circuit. It can be understood that, in the case that the total flow of the cooling liquid in the first closed loop circuit is unchanged, if the flow of the cooling liquid flowing through the first branch is reduced, the flow of the cooling liquid flowing through the second branch will increase.

[0010] In a possible implementation form of the first aspect, when the first valve includes a first electromagnetic valve and a first three-way valve, and the first connecting head is a second three-way valve, the first valve port of the first three-way valve is configured to receive the cooling liquid in the first closed loop circuit, the second valve port of the first three-way valve is connected with the first valve port of the first connecting head through the first electromagnetic valve and the cooling liquid flow channel of the oil-water heat exchanger to form the first branch, the third valve port of the first three-way valve is connected with the second valve port of the first connecting head to form the second branch, and the third valve port of the first connecting head is configured to output the cooling liquid from the first valve port of the first connecting head and the second valve port of the first connecting head, and here, the first electromagnetic valve is configured to control the conduction of the first branch.

[0011] In this embodiment, when the first electromagnetic valve is closed, the first branch is not conductive, and the flow of the cooling liquid flowing through the first branch is zero, that is, the cooling liquid in the first closed loop does not flow through the oil-water heat exchanger; when the first electromagnetic valve is opened, the first branch is conductive, and the cooling liquid in the first closed loop is divided into two parts by the first branch and the second branch. The adjustment of the flow of the cooling liquid flowing through the first branch is realized.

[0012] Further, the first valve further includes a second electromagnetic valve, and the third valve port of the first three-way valve is connected with the second valve port of the first connecting head through the second electromagnetic valve to form the second branch, and the second electromagnetic valve is used to control the conduction of the second branch.

[0013] In this embodiment, when the first electromagnetic valve is opened and the second electromagnetic valve is closed, the cooling liquid in the first closed loop flows through the first branch, and the flow of the cooling liquid flowing through the second branch is zero; when the first electromagnetic valve is closed and the second electromagnetic valve is opened, the cooling liquid in the first closed loop flows through the second branch, and the flow of the cooling liquid flowing through the first branch is zero; when the first electromagnetic valve is opened and the second electromagnetic valve is opened, the cooling liquid in the first closed loop flows through the first branch and the second branch. The adjustment of the flow of the cooling liquid flowing through the first branch is realized, and when the oil temperature of the motor is low, the application of the electric drive efficiency is beneficial to improve the electric drive efficiency.

[0014] In a possible implementation of the first aspect, the first closed loop further includes a second valve and a second connecting head, the second valve, the heat dissipation component and the second connecting head are sequentially connected to form a third branch, the second valve and the second connecting head are sequentially connected to form a fourth branch parallel to the third branch, and the second valve is used to control the flow of the cooling liquid flowing through the third branch in the first closed loop.

[0015] In this embodiment, the second valve supports the control of the flow of the cooling liquid flowing through the heat dissipation component in the first closed loop. The more the flow of the cooling liquid flowing through the heat dissipation component, the more the heat taken away by the cooling liquid, the lower the temperature of the cooling liquid, and the better the subsequent cooling effect. By controlling the first valve, the cooling demand of the oil of the motor can be met; and by controlling the second valve, the cooling demand of the heat generating component can be met.

[0016] In a possible implementation of the first aspect, when the second valve is a three-way proportional valve and the second connecting head is a three-way valve, the first inlet of the second valve is used to receive the cooling liquid in the first closed loop, the first outlet of the second valve is connected with the first valve port of the second connecting head through the heat dissipation component to form the third branch, the second outlet of the second valve and the second valve port of the second connecting head are sequentially connected to form the fourth branch, and the third valve port of the second connecting head is used to converge and output the cooling liquid from the first valve port of the second connecting head and the second valve port of the second connecting head.

[0017] In this embodiment, the second valve can proportionally control the flow of the cooling liquid flowing through the third branch and the fourth branch in the first closed loop, improving the control refinement. When the total flow of the cooling liquid in the first closed loop remains unchanged, if the flow of the cooling liquid flowing through the third branch increases, the flow of the cooling liquid flowing through the fourth branch will decrease.

[0018] In an implementation, the second valve includes a third electromagnetic valve and a third three-way valve, the first valve port of the third three-way valve is used to receive the cooling liquid in the first closed loop, the second valve port of the third three-way valve is connected to the first valve port of the second connection head through the third electromagnetic valve and the heat dissipation component to form the third branch, the third valve port of the third three-way valve and the second valve port of the second connection head are connected to form the fourth branch, and the third valve port of the second connection head is used to output the cooling liquid from the first valve port of the second connection head and the second valve port of the second connection head, where the third electromagnetic valve is used to control the conduction of the third branch.

[0019] In this embodiment, when the third electromagnetic valve is closed, the third branch is not conducted, and the flow of the cooling liquid flowing through the third branch is zero, that is, the cooling liquid does not flow through the oil-water heat exchanger; when the third electromagnetic valve is opened, the third branch is conducted, and the third branch and the fourth branch divide the total flow of the cooling liquid in the first closed loop. The adjustment of the flow of the cooling liquid flowing through the third branch is realized, and the adjustment based on the cooling demand of the heat generating component can be specifically supported.

[0020] In some schemes, the second valve further includes a fourth electromagnetic valve, the fourth electromagnetic valve is arranged on the fourth branch, the third valve port of the third three-way valve and the second valve port of the second connection head are connected to form the fourth branch through the fourth electromagnetic valve, and the fourth electromagnetic valve is used to control the conduction of the fourth branch.

[0021] In this embodiment, when the third electromagnetic valve is opened and the fourth electromagnetic valve is closed, the cooling liquid in the first closed loop flows through the third branch, and the flow of the cooling liquid flowing through the fourth branch is zero; when the third electromagnetic valve is closed and the fourth electromagnetic valve is opened, the cooling liquid in the first closed loop flows through the fourth branch, and the flow of the cooling liquid flowing through the third branch is zero; when the third electromagnetic valve is opened and the fourth electromagnetic valve is opened, the cooling liquid in the first closed loop flows through the third branch and the fourth branch. The adjustment of the flow of the cooling liquid flowing through the third branch is realized, and the adjustment based on the cooling demand of the heat generating component can be specifically supported.

[0022] In a possible implementation of the first aspect, the thermal management system further includes a second closed loop circuit, the second closed loop circuit including a second water pump, an engine waste heat exchanger, a fifth electromagnetic valve, and a coolant flow channel of the oil-water heat exchanger, the second water pump being configured to output coolant to the second closed loop circuit, the engine waste heat exchanger being configured to collect waste heat generated by the engine, and the fifth electromagnetic valve being configured to control conduction of the second closed loop circuit.

[0023] In this implementation, when the oil temperature of the motor is low, the fifth electromagnetic valve is opened, the second closed loop circuit is conducted, and the engine waste heat can be used to heat the coolant flowing through the oil-water heat exchanger. The temperature of the heated coolant is higher than the oil temperature flowing through the oil-water heat exchanger. Heat transfer occurs between the coolant and the oil, thereby increasing the oil temperature of the motor and reducing the oil stirring loss, which is conducive to improving the electric drive efficiency.

[0024] In a second aspect, the present application provides a thermal management system of a vehicle, including a first closed loop circuit and a second closed loop circuit. The first closed loop circuit includes a motor, an oil pump, and an oil-water heat exchange system. The oil pump is configured to output oil to the first closed loop circuit. The second closed loop circuit includes a water pump and a coolant flow channel of the oil-water heat exchanger. The water pump is configured to output coolant to the second closed loop circuit. The oil-water heat exchange system includes an oil flow channel of the oil-water heat exchanger, a first valve, and a first connector. The first valve, the oil flow channel of the oil-water heat exchanger, and the first connector are connected in sequence to form a first branch. The first valve and the first connector are connected in sequence to form a second branch parallel to the first branch. The first valve is configured to control the flow of oil in the first closed loop circuit through the first branch. The oil-water heat exchanger is configured to realize heat transfer between the oil flowing through the oil-water heat exchanger and the coolant flowing through the oil-water heat exchanger.

[0025] For example, the first valve is a three-way proportional valve, and the first connector is a three-way valve. Alternatively, the first valve includes a first electromagnetic valve and a first three-way valve, and the first connector is a second three-way valve.

[0026] In the above scheme, in the first closed loop circuit in which the oil-water heat exchanger, the oil pump, and the motor are located, a first valve is arranged at the inlet of the oil-water heat exchanger, and a first connector is arranged at the outlet of the oil-water heat exchanger. A bypass branch (i.e., the second branch) is established for the oil flow channel of the oil-water heat exchanger through the connection of the first valve and the first connector. The first valve can independently control the flow of the oil flowing through the oil-water heat exchanger. For example, when the oil temperature of the motor is low, the oil in the first closed loop circuit can not flow through or less flow through the oil-water heat exchanger, and the oil temperature of the motor will not be reduced by the coolant flowing through the oil-water heat exchanger. At the same time, the motor self-heating can also heat the oil of the motor, which is conducive to improving the electric drive efficiency and the low-temperature endurance of the vehicle.

[0027] In a possible implementation of the second aspect, the first valve is a three-way proportional valve, and the first connector is a three-way valve. The first inlet of the first valve is configured to receive oil in the first closed loop. The first outlet of the first valve is connected to the first port of the first connector via the oil flow channel of the oil-water heat exchanger to form the first branch. The second outlet of the first valve is connected to the second port of the first connector to form the second branch. The third port of the first connector is configured to output oil from the first port of the first connector and the second port of the first connector.

[0028] In this implementation, the first valve can proportionally control the flow of oil in the first closed loop through the first branch and the second branch, improving the degree of refinement of oil flow control and facilitating the accuracy of temperature regulation.

[0029] In a possible implementation of the second aspect, the first valve includes a first electromagnetic valve and a first three-way valve. When the first connector is a second three-way valve, the first port of the first three-way valve is configured to receive oil in the first closed loop. The second port of the first three-way valve is connected to the first port of the first connector via the first electromagnetic valve and the oil flow channel of the oil-water heat exchanger to form the first branch. The third port of the first three-way valve is connected to the second port of the first connector to form the second branch. The third port of the first connector is configured to output oil from the first port of the first connector and the second port of the first connector. The first electromagnetic valve is configured to control the conduction of the first branch.

[0030] In this implementation, when the first electromagnetic valve is closed, the first branch is not conductive, and the flow of oil through the first branch is zero, i.e., the oil in the first closed loop does not flow through the oil-water heat exchanger. When the first electromagnetic valve is open, the first branch is conductive, and the first branch and the second branch divide the total flow of oil in the first closed loop. This achieves adjustment of the flow of oil through the first branch.

[0031] Further, the first valve further includes a second electromagnetic valve. The third port of the first three-way valve is connected to the second port of the first connector via the second electromagnetic valve to form the second branch. The second electromagnetic valve is configured to control the conduction of the second branch.

[0032] In this implementation, when the first electromagnetic valve is open and the second electromagnetic valve is closed, the oil in the first closed loop flows through the first branch, and the flow of oil through the second branch is zero. When the first electromagnetic valve is closed and the second electromagnetic valve is open, the oil in the first closed loop flows through the second branch, and the flow of oil through the first branch is zero. When the first electromagnetic valve is open and the second electromagnetic valve is open, the oil in the first closed loop flows through both the first branch and the second branch. This achieves adjustment of the flow of oil through the first branch, which is beneficial for improving the efficiency of electric drive when the temperature of the oil in the motor is low.

[0033] Optionally, the second closed loop further comprises a heat dissipation component and a heat generation component, and the heat dissipation component is configured to dissipate heat for the cooling liquid in the second closed loop.

[0034] In this embodiment, the cooling liquid in the second closed loop can also dissipate heat for the heat generation component, taking into account the cooling requirement of the heat generation component. The arrangement of the first closed loop and the second closed loop can decouple the heat dissipation control of the heat generation component and the oil-water heat exchanger.

[0035] In a third aspect, the present application provides an electric machine system, comprising a first closed loop, the first closed loop comprising an electric machine, an oil pump, a first valve and a first connector; wherein an inlet of the first valve is configured to receive oil output by the oil pump, a first outlet of the first valve and a first inlet of the first connector are respectively configured to connect two ends of an oil flow channel of an oil-water heat exchanger, a second outlet of the first valve is connected with a second inlet of the first connector, an outlet of the first connector is configured to output oil from the first inlet of the first connector and the second inlet of the first connector, and the first valve is configured to adjust the flow of the oil flowing through the oil-water heat exchanger.

[0036] In the above scheme, by arranging the first valve and the first connector in the closed loop in which the electric machine and the oil pump are located, the connection between the first valve and the first connector can establish a bypass branch for the circulation of the oil, and the first valve can enable independent control of the flow of the oil flowing through the oil-water heat exchanger, which is suitable for different cooling requirements of the oil of the electric machine. In the case that the temperature of the oil of the electric machine is low, the electric machine system can improve the electric drive efficiency and the low-temperature endurance capability of the vehicle.

[0037] In a possible implementation manner of the third aspect, the electric machine system comprises an oil-water heat exchanger, and the oil-water heat exchanger is configured to realize heat transfer between the oil flowing through the oil-water heat exchanger and the cooling liquid flowing through the oil-water heat exchanger.

[0038] In this embodiment, the first valve, the oil flow channel of the oil-water heat exchanger and the first connector are connected in sequence to form a first branch, the first valve and the first connector are connected in sequence to form a second branch parallel to the first branch, and the first valve can control the flow of the oil flowing through the first branch.

[0039] In a possible implementation manner of the third aspect, the first valve is a three-way proportional valve, and the first connector is a three-way valve; or the first valve comprises a first electromagnetic valve and a first three-way valve, and the first connector is a second three-way valve.

[0040] As can be seen, various embodiments of the first valve are provided, and the use of the three-way proportional valve in the first valve can improve the degree of refinement of the control of the flow of the oil by the first valve, and the use of the electromagnetic valve in the first valve can also achieve the adjustment of the flow of the oil flowing through the oil-water heat exchanger.

[0041] In a possible implementation of the third aspect, when the first valve comprises a first electromagnetic valve and a first three-way valve, the inlet of the first valve is a first valve port of the first three-way valve, the first outlet of the first valve is an outlet of the first electromagnetic valve, a second valve port of the first three-way valve is connected with an inlet of the first electromagnetic valve, and the second outlet of the first valve is a third valve port of the first three-way valve.

[0042] In a fourth aspect, the present application provides a thermal management control method for controlling a thermal management system of a vehicle, the thermal management system comprising a first closed loop circuit, the first closed loop circuit comprising a first water pump, a heat dissipation component, an oil-water heat exchanger system, and a heat generating component, the first water pump being configured to output coolant to the first closed loop circuit; the oil-water heat exchanger system comprising a first valve, a first connecting head, and a coolant flow passage of the oil-water heat exchanger, the first valve, the coolant flow passage of the oil-water heat exchanger, and the first connecting head being connected in sequence to form a first branch, the first valve and the first connecting head being connected in sequence to form a second branch parallel to the first branch, the oil-water heat exchanger being configured to realize heat transfer between coolant flowing through the oil-water heat exchanger and oil of the electric machine; the method comprising: obtaining temperature detection information, the temperature detection information comprising an oil temperature of the electric machine; and adjusting a flow rate of the coolant flowing through the first branch by controlling the first valve based on the temperature detection information.

[0043] In the above solution, the first valve and the first connecting head are provided in the thermal management system to establish a bypass branch for the coolant flow passage of the oil-water heat exchanger, and the flow rate of the coolant flowing through the first branch can be adjusted by controlling the first valve based on the obtained temperature detection information. The oil-water heat exchanger is arranged in the first branch, so the flow rate of the coolant flowing through the oil-water heat exchanger can be adjusted. In this way, the flow rate of the coolant flowing through the oil-water heat exchanger can be dynamically adjusted based on the oil temperature of the electric machine, so that the heat loss can be reduced when the oil temperature of the electric machine is low, and the oil temperature of the electric machine can gradually rise due to the heat generated by the electric machine itself, thereby reducing the oil stirring loss and improving the electric drive efficiency and the cruising range of the vehicle.

[0044] In a possible implementation of the fourth aspect, adjusting the flow rate of the coolant flowing through the first branch by controlling the first valve based on the temperature detection information comprises: when the oil temperature of the electric machine is less than a first threshold, controlling the first valve to make the flow rate of the coolant flowing through the first branch be zero or the flow rate of the coolant flowing through the first branch be less than the flow rate of the coolant flowing through the second branch.

[0045] In this implementation, in the scenario where the oil temperature of the electric machine is low, the coolant does not flow through or only a small part of the coolant flows through the first branch, so that the oil flowing through the oil-water heat exchanger is not cooled or is cooled as little as possible by the coolant, and the oil temperature of the electric machine gradually rises due to the heat generated by the electric machine itself, thereby realizing self-heating of the electric machine, reducing the oil stirring loss, and improving the electric drive efficiency.

[0046] In a possible implementation of the fourth aspect, the first valve is a three-way proportional valve, and the first connector is a three-way valve. The first inlet of the first valve is configured to receive the cooling liquid in the first closed loop. The first outlet of the first valve is connected to the first port of the first connector via the cooling liquid flow channel of the oil-water heat exchanger to form the first branch. The second outlet of the first valve is connected to the second port of the first connector to form the second branch. The third port of the first connector is configured to output the cooling liquid from the first port of the first connector and the second port of the first connector. Before the control of the first valve, the method further includes: determining that the flow rate of the cooling liquid in the first closed loop is a first value; obtaining, according to the first value and the oil temperature of the motor, a first proportional value of the flow rate of the cooling liquid flowing through the first branch; and controlling the first valve based on the first proportional value.

[0047] In this implementation, the first valve is a three-way proportional valve, which can distribute the flow rate proportion of the cooling liquid flowing through the first branch, thereby improving the refinement of the cooling liquid flow control and better achieving temperature regulation.

[0048] In a possible implementation of the fourth aspect, the first valve includes a first electromagnetic valve and a first three-way valve. The first connector is a second three-way valve. The first port of the first three-way valve is configured to receive the cooling liquid in the first closed loop. The second port of the first three-way valve is connected to the first port of the first connector via the first electromagnetic valve and the cooling liquid flow channel of the oil-water heat exchanger to form the first branch. The third port of the first three-way valve is connected to the second port of the first connector to form the second branch. The third port of the first connector is configured to output the cooling liquid from the first port of the first connector and the second port of the first connector. The control of the first valve includes: controlling the first electromagnetic valve to be closed.

[0049] In this implementation, the first electromagnetic valve is controlled to be closed, so the first branch is not conducted, and the flow rate of the cooling liquid flowing through the first branch is zero. This is applied to a scenario in which the oil temperature of the motor is low. Since the flow rate of the cooling liquid flowing through the first branch is zero, the oil flowing through the oil-water heat exchanger is not cooled by the cooling liquid. The heat generated by the motor itself heats the oil of the motor, so that the oil temperature of the motor gradually rises, greatly reduces the oil stirring loss, and is beneficial to improving the electric drive efficiency and the cruising range of the vehicle.

[0050] In a possible implementation form of the fourth aspect, the temperature detection information further comprises a temperature of the cooling liquid, and the adjusting the flow rate of the cooling liquid flowing through the first branch according to the temperature detection information comprises: when the oil temperature of the motor is less than the first threshold value and the temperature of the cooling liquid is greater than the oil temperature of the motor, controlling the first valve to make the cooling liquid output by the water pump flow through the first branch, or to make the flow rate of the cooling liquid flowing through the first branch greater than the flow rate of the cooling liquid flowing through the second branch.

[0051] In this way, in the scenario that the oil temperature of the motor is low and the temperature of the cooling liquid is higher than the oil temperature of the motor, the cooling liquid flows through the oil-water heat exchanger of the first branch entirely or mostly, and the cooling liquid can heat the oil flowing through the oil-water heat exchanger, so as to increase the oil temperature of the motor and reduce the oil stirring loss.

[0052] In a possible implementation form of the fourth aspect, the temperature detection information further comprises a temperature of the heat-generating component, and the method further comprises: if the temperature of the heat-generating component is greater than a second threshold value, controlling the flow rate of the cooling liquid output to the first closed loop by the first water pump based on the temperature of the heat-generating component, wherein the second threshold value is greater than the first threshold value.

[0053] In this implementation form, in the scenario that the oil temperature of the motor is low and the temperature of the heat-generating component is high, the flow rate of the cooling liquid output by the first water pump can be adjusted according to the cooling demand of the heat-generating component, for example, the greater the flow rate of the cooling liquid output by the first water pump, the more heat the cooling liquid can take away. In this way, the heat-generating component can be prevented from overheating.

[0054] In a possible implementation form of the fourth aspect, the temperature detection information further comprises a temperature of the heat-generating component, and the method further comprises: if the temperature of the heat-generating component is less than a third threshold value, controlling the first water pump to make the flow rate of the cooling liquid of the first closed loop be zero or to make the flow rate of the cooling liquid of the first closed loop be less than a flow rate threshold value.

[0055] In this implementation form, in the scenario that the oil temperature of the motor is low and the temperature of the heat-generating component is low, the first water pump can be controlled to make the total flow rate of the cooling liquid of the first closed loop be small or even zero, so that the heat taken away by the cooling liquid is also small, and the cooling demand of each component can be met while the power consumption is saved.

[0056] In a possible implementation manner of the fourth aspect, the first closed loop further includes a second valve and a second connector, the second valve, the heat dissipation component and the second connector are sequentially connected to form a third branch, the second valve and the second connector are sequentially connected to form a fourth branch in parallel with the third branch, and the method further includes: when the oil temperature of the motor is less than the first threshold value, if the temperature of the heat generating component is greater than the second threshold value, controlling the second valve to make the flow rate of the cooling liquid flowing through the fourth branch be zero or the flow rate of the cooling liquid flowing through the third branch be greater than the flow rate of the cooling liquid flowing through the fourth branch.

[0057] In this implementation manner, in the scenario where the oil temperature of the motor is low and the temperature of the heat generating component is high, the cooling liquid flows through the third branch entirely or mostly, and the third branch has the heat dissipation component, that is, the cooling liquid flows through the heat dissipation component entirely or mostly. The more the flow rate of the cooling liquid flowing through the heat dissipation component, the more the heat taken away by the cooling liquid, the lower the temperature of the cooling liquid, and the better the cooling effect when the subsequent cooling liquid flows through the heat generating component, thereby avoiding over-temperature of the heat generating component.

[0058] In a possible implementation manner of the fourth aspect, the second valve is a three-way proportional valve and the second connector is a three-way valve, a first inlet of the second valve is configured to receive the cooling liquid in the first closed loop, a first outlet of the second valve is connected with the first valve port of the second connector via the heat dissipation component to form the third branch, a second outlet of the second valve is sequentially connected with a second valve port of the second connector to form the fourth branch, and a third valve port of the second connector outputs the cooling liquid output by the first valve port and the second valve port of the second connector; before the second valve is controlled, the method further includes: determining that the flow rate of the cooling liquid in the first closed loop is a second value; obtaining, according to the second value and the temperature of the heat generating component, a second proportional value of the flow rate of the cooling liquid flowing through the third branch; and controlling the second valve based on the second proportional value.

[0059] In this implementation manner, the second valve is a three-way proportional valve, which can distribute the flow rate proportion of the cooling liquid flowing through the third branch, thereby improving the fine degree of control of the flow rate of the cooling liquid and better achieving temperature regulation.

[0060] Optionally, the second valve includes a second electromagnetic valve and a third three-way valve, and the second connector is a fourth three-way valve, a first valve port of the third three-way valve is configured to receive the cooling liquid in the first closed loop, a second valve port of the third three-way valve is sequentially connected with the first valve port of the second connector via the second electromagnetic valve and the heat dissipation component to form the third branch, a third valve port of the third three-way valve is connected with a second valve port of the second connector to form the fourth branch, and a third valve port of the second connector outputs the cooling liquid output by the first valve port and the second valve port of the second connector; and controlling the second valve includes: controlling the second electromagnetic valve to be opened.

[0061] In this embodiment, the second electromagnetic valve is controlled to be opened, the third branch is turned on, and the third branch and the fourth branch both shunt the total amount of the cooling liquid in the first closed loop circuit. The flow rate of the cooling liquid flowing through the first branch is zero. The oil temperature applied to the motor is low. In the scenario, the total flow rate of the cooling liquid flowing through the first branch, and the cooling liquid flowing through the third branch is taken away heat, which can better cool the heat generating components.

[0062] In a possible implementation of the fourth aspect, the thermal management system further includes a second closed loop circuit, the second closed loop circuit including a second water pump, an engine waste heat exchanger, a third electromagnetic valve, and a cooling liquid flow channel of the oil-water heat exchanger. The second water pump is configured to output cooling liquid to the second closed loop circuit. The engine waste heat exchanger is configured to collect waste heat generated by the engine. The method further includes: when the oil temperature of the motor is less than the first threshold, controlling the third electromagnetic valve to be opened.

[0063] In this embodiment, in the scenario where the oil temperature of the motor is low, the third electromagnetic valve is controlled to be opened, so as to heat the oil flowing through the oil-water heat exchanger by using the engine waste heat, thereby improving the oil temperature of the motor, reducing the oil stirring loss, and being conducive to improving the electric drive efficiency and the endurance of the vehicle.

[0064] In a fifth aspect, the present application provides a thermal management control method for controlling a thermal management system of a vehicle. The thermal management system includes a first closed loop circuit and a second closed loop circuit. The first closed loop circuit includes a motor, an oil pump, and an oil-water heat exchange system. The second closed loop circuit includes a water pump and a cooling liquid flow channel of an oil-water heat exchanger. The oil-water heat exchange system includes an oil liquid flow channel of the oil-water heat exchanger, a first valve, and a first connecting head. The first valve, the oil liquid flow channel of the oil-water heat exchanger, and the first connecting head are sequentially connected to form a first branch. The first valve and the first connecting head are sequentially connected to form a second branch parallel to the first branch. The first valve is configured to control the flow rate of the oil output by the oil pump in the first closed loop circuit flowing through the first branch. The oil-water heat exchanger is configured to realize heat transfer between the oil flowing through the oil-water heat exchanger and the cooling liquid flowing through the oil-water heat exchanger. The method includes: obtaining temperature detection information, the temperature detection information including the oil temperature of the motor; and adjusting the flow rate of the oil flowing through the first branch by controlling the first valve according to the temperature detection information.

[0065] In the scheme, the bypass branch is established for the oil flow channel of the oil-water heat exchanger in the thermal management system by setting the first valve and the first connecting head, the first valve can be controlled based on the acquired temperature detection information to adjust the flow of the oil flowing through the first branch, and the oil-water heat exchanger is in the first branch, that is, the flow of the oil flowing through the oil-water heat exchanger can be adjusted. In this way, the flow of the oil flowing through the oil-water heat exchanger can be dynamically adjusted based on the oil temperature of the motor, so that the heat loss is small or zero when the oil temperature of the motor is low, and the heat generated by the motor itself can gradually increase the oil temperature of the motor, thereby reducing the oil stirring loss and improving the electric drive efficiency and the cruising range of the vehicle.

[0066] In a possible implementation of the fifth aspect, the flow of the oil flowing through the first branch is adjusted by controlling the first valve according to the temperature detection information, including: when the oil temperature of the motor is less than the first threshold, the first valve is controlled so that the flow of the oil flowing through the first branch is zero or the flow of the oil flowing through the first branch is less than the flow of the oil flowing through the second branch.

[0067] In this embodiment, in the case that the oil temperature of the motor is low, the oil can not flow through or only a small part of the oil flows through the first branch, that is, the oil of the motor does not flow through or only a small part of the oil flows through the oil-water heat exchanger, and only the oil flowing through the oil-water heat exchanger is taken away by the cooling liquid flowing through the oil-water heat exchanger. Therefore, the heat loss of the oil of the motor is small or zero, and the heat generated by the motor itself can gradually increase the oil temperature of the motor, thereby realizing self-heating of the motor oil, reducing the oil stirring loss, and improving the electric drive efficiency.

[0068] In a possible implementation of the fifth aspect, the first valve is a three-way proportional valve and the first connecting head is a three-way valve, the first inlet of the first valve is used to receive the oil in the first closed loop, the first outlet of the first valve is connected with the first valve port of the first connecting head through the oil flow channel of the oil-water heat exchanger to form the first branch, the second outlet of the first valve is connected with the second valve port of the first connecting head to form the second branch, and the third valve port of the first connecting head is used to output the oil from the first valve port of the first connecting head and the second valve port of the first connecting head; before the first valve is controlled, the method further includes: determining that the flow of the oil in the first closed loop is a target value; obtaining a flow proportion of the oil flowing through the first branch as a target proportion value according to the target value and the oil temperature of the motor; and controlling the first valve, including: controlling the first valve based on the target proportion value.

[0069] In this embodiment, the first valve is a three-way proportional valve, which can distribute the flow proportion of the oil flowing through the first branch, thereby improving the fine degree of oil flow control and better realizing temperature regulation.

[0070] In a possible implementation of the fifth aspect, the first valve includes a first electromagnetic valve and a first three-way valve, the first connector is a second three-way valve, a first valve port of the first three-way valve is configured to receive oil in the first closed loop, a second valve port of the first three-way valve is connected to the first valve port of the first connector via the first electromagnetic valve and an oil flow channel of the oil-water heat exchanger to form a first branch, a third valve port of the first three-way valve is connected to a second valve port of the first connector to form a second branch, and a third valve port of the first connector is configured to output oil from the first valve port of the first connector and the second valve port of the first connector.

[0071] In this implementation, the first electromagnetic valve is controlled to be closed, so that the first branch is not conducted, and the flow of the oil flowing through the first branch is zero. The oil temperature of the motor is low in the scene, which means that the flow of the oil flowing through the oil-water heat exchanger is zero. The oil of the motor is not taken away by the coolant, and the heat generated by the motor itself heats the oil of the motor, so that the oil temperature of the motor gradually rises, greatly reduces the oil stirring loss, and is beneficial to improve the electric drive efficiency and the endurance of the vehicle.

[0072] In a possible implementation of the fifth aspect, the temperature detection information further includes a temperature of the coolant at an inlet of the coolant flow channel of the oil-water heat exchanger. According to the temperature detection information, the flow of the oil flowing through the first branch is adjusted by controlling the first valve, including: when the oil temperature of the motor is less than the first threshold and the temperature of the coolant is greater than the oil temperature of the motor, the first valve is controlled so that the oil output by the oil pump flows through the first branch, or the flow of the oil flowing through the first branch is greater than the flow of the oil flowing through the second branch.

[0073] In this way, in the scene where the oil temperature of the motor is low and the temperature of the coolant is higher than the oil temperature of the motor, the oil flows through the oil-water heat exchanger of the first branch entirely or mostly, so that the coolant flowing through the oil-water heat exchanger can heat the oil flowing through the oil-water heat exchanger, thereby improving the oil temperature of the motor and reducing the oil stirring loss.

[0074] In a possible implementation of the fifth aspect, the second closed loop further includes a heat generating component, and the temperature detection information further includes a temperature of the heat generating component. The method further includes: when the oil temperature of the motor is less than the first threshold, if the temperature of the heat generating component is greater than a second threshold, controlling the flow of the coolant output to the second closed loop by the water pump based on the temperature of the heat generating component, where the second threshold is greater than the first threshold.

[0075] In this embodiment, in the scenario where the oil temperature of the motor is low and the temperature of the heat-generating component is high, the flow rate of the coolant output by the water pump can also be adjusted according to the cooling demand of the heat-generating component, for example, the greater the flow rate of the coolant output by the water pump, the more heat the coolant can take away. In this way, the heat-generating component can be prevented from overheating.

[0076] In a possible implementation of the fifth aspect, the second closed loop further includes a heat-generating component, and the temperature detection information further includes a temperature of the heat-generating component, and the method further includes: when the oil temperature of the motor is less than the first threshold, if the temperature of the heat-generating component is less than a third threshold, controlling the water pump to make the flow rate of the coolant in the second closed loop be zero or less than a flow rate threshold.

[0077] In this embodiment, in the scenario where the oil temperature of the motor is low and the temperature of the heat-generating component is low, the water pump can also be controlled to make the total flow rate of the coolant in the second closed loop be small or even zero, so that the heat taken away by the coolant is also small, and the energy consumption can be saved while meeting the cooling demand of each component.

[0078] In a sixth aspect, the present application provides a device for thermal management control, the device including a communication unit and a processing unit, and the device is configured to implement the method in the fourth aspect or any possible implementation of the fourth aspect.

[0079] In a seventh aspect, the present application provides a device for thermal management control, the device including a communication unit and a processing unit, and the device is configured to implement the method in the fifth aspect or any possible implementation of the fifth aspect.

[0080] In an eighth aspect, the present application provides a chip including a processor and a memory, wherein the memory is configured to store program instructions; and the processor is configured to invoke the program instructions in the memory, so that the chip executes the method in the fourth aspect or any possible implementation of the fourth aspect, or executes the method in the fifth aspect or any possible implementation of the fifth aspect.

[0081] In a ninth aspect, the present application provides a control system including a control device and a target system, and the control device is configured to control the target system; when the control device executes the method in the fourth aspect or any possible implementation of the fourth aspect, the target system can be the thermal management system in the first aspect or any possible implementation of the first aspect; when the control device executes the method in the fifth aspect or any possible implementation of the fifth aspect, the target system can be the thermal management system in the second aspect or any possible implementation of the second aspect, or the motor system in the third aspect or any possible implementation of the third aspect.

[0082] In a tenth aspect, the present application provides a vehicle comprising the thermal management system in the first aspect or any possible implementation of the first aspect, or comprising the thermal management system in the second aspect or any possible implementation of the second aspect, or comprising the motor system in the second aspect or any possible implementation of the second aspect, or comprising the apparatus in the sixth aspect, or comprising the apparatus in the seventh aspect, or comprising the chip in the eighth aspect, or comprising the control system in the ninth aspect.

[0083] In an eleventh aspect, the present application provides a computer readable storage medium comprising computer instructions, when the computer instructions are run on a processor, implement the method in the fourth aspect or any possible implementation of the fourth aspect, or implement the method in the fifth aspect or any possible implementation of the fifth aspect.

[0084] In a twelfth aspect, the present application provides a computer program product, when the computer program product is executed by a processor, implement the method in the fourth aspect or any possible implementation of the fourth aspect, or implement the method in the fifth aspect or any possible implementation of the fifth aspect.

[0085] Exemplarily, the computer program product can comprise a software product (for example, a software installation package), and can also comprise a hardware product (for example, a computer readable storage medium). BRIEF DESCRIPTION OF DRAWINGS

[0086] FIG. 1 is a schematic diagram of a control system provided by an embodiment of the present application;

[0087] FIG. 2 is a schematic diagram of a thermal management system provided by an embodiment of the present application;

[0088] FIGS. 3A-3C is a schematic diagram of a thermal management system provided by an embodiment of the present application;

[0089] FIG. 4 is a schematic diagram of a thermal management system provided by an embodiment of the present application;

[0090] FIGS. 5A-5B is a schematic diagram of a thermal management system provided by an embodiment of the present application;

[0091] FIG. 6 is a schematic diagram of a thermal management system provided by an embodiment of the present application;

[0092] FIG. 7 is a schematic diagram of a thermal management system provided by an embodiment of the present application;

[0093] FIGS. 8A-8Cis a structural schematic diagram of some heat management systems provided by embodiments of the present application;

[0094] FIG. 9A is a schematic diagram of a motor system provided by embodiments of the present application;

[0095] FIG. 9B is a structural schematic diagram of a motor system provided by embodiments of the present application;

[0096] FIG. 10 is a flow chart of a heat management control method provided by embodiments of the present application;

[0097] FIG. 11 is an internal fluid flow schematic diagram of an oil-water heat exchanger in a first type of heat management system provided by embodiments of the present application;

[0098] FIG. 12 is a flow chart of another heat management control method provided by embodiments of the present application;

[0099] FIG. 13 is an internal fluid flow schematic diagram of an oil-water heat exchanger in a second type of heat management system provided by embodiments of the present application;

[0100] FIG. 14 is a structural schematic diagram of a control device provided by embodiments of the present application;

[0101] FIG. 15 is a structural schematic diagram of a control device provided by embodiments of the present application. DETAILED DESCRIPTION

[0102] The prefix words such as "first", "second" are used only to distinguish different description objects, and have no limiting effect on the position, order, priority, quantity or content of the described objects. For example, the described object is "three-way valve", and the ordinal number before "three-way valve" in "first three-way valve" and "second three-way valve" is only used to distinguish two different three-way valves. For another example, the described object is "level", and the ordinal number before "level" in "first level" and "second level" does not limit the priority between "levels". For another example, the quantity of the described object is not limited by the prefix word, which can be one or more. For example, "first device", where the quantity of "device" can be one or more. In addition, the objects modified by different prefix words can be the same or different, for example, the described object is "device", and "first device" and "second device" can be the same device, the same type of device or different types of devices. For another example, the described object is "information", and "first information" and "second information" can be information of the same content or information of different content. In short, the use of prefix words in the embodiments of the present application for distinguishing description objects does not constitute a limitation on the described objects, and the statements of the described objects refer to the description of the context in the claims or embodiments, and should not constitute an unnecessary limitation because of the use of such prefix words.

[0103] The current motor, motor controller and DC-DC converter and other devices form a closed loop in series, the cooling requirements of different devices are different, the water pump controls the flow of the cooling liquid according to the highest cooling requirement of the device, the cooling liquid is used to cool the devices in the closed loop, when the oil temperature of the motor is low, strong cooling will cause the oil temperature of the motor to be too low, the oil viscosity of the motor will increase, which will reduce the efficiency of the electric drive and is not conducive to the endurance of the vehicle. In view of the above problems, the present application provides a control system, which can adjust the flow of the cooling liquid or oil flowing through the oil-water heat exchanger according to the oil temperature of the motor, and the oil-water heat exchanger is used to realize heat transfer between the cooling liquid flowing through the oil-water heat exchanger and the oil of the motor. When the oil temperature of the motor is low, the heat of the oil of the motor can not be taken away, and at the same time, the cooling of other devices in the closed loop is not affected. In this way, it is beneficial to improve the electric drive efficiency and the low-temperature endurance capability of the vehicle.

[0104] The composition of the control system will be introduced first. Referring to FIG. 1 , FIG. 1 is a schematic diagram of the architecture of a control system provided by the embodiments of the present application. The control system comprises a control device and a thermal management system, wherein the control device is used to control the thermal management system. The control device and the thermal management system are connected and communicated in a wired and / or wireless manner.

[0105] The control device and the thermal management system are both arranged in the vehicle. The scheme is applicable to a vehicle, which is a traffic tool suitable for driving by an electric drive. Here, the vehicle is a new energy vehicle, which can be an electric vehicle (EV), a hybrid electric vehicle (HEV), a range extended EV, a plug-in HEV, a fuel cell vehicle, or other new energy vehicles.

[0106] Exemplarily, the control device can be a thermal management controller of the vehicle or a component in the thermal management controller, such as a chip, an integrated circuit, or the like. In the scheme, the control device can be connected with the water pump and the valves in the thermal management system to control the water pump and the valves. The thermal management system will be described in the following embodiments, and will not be described here.

[0107] FIG. 1 The control system shown can be applied to various application scenarios, such as mobile internet (MI), self driving, transportation safety, smart city, and the like.

[0108] FIG. 1 The control system shown can be applied to various network types, such as one or more of SparkLink, long term evolution (LTE) network, 5th generation mobile communication technology (5G), wireless local area network (such as Wi-Fi), bluetooth (BT), Zigbee, or vehicle short-range wireless communication network, and the like.

[0109] Here, FIG. 1 It is only an exemplary architecture diagram, but not limited FIG. 1 The number of network elements included in the system shown. Although FIG. 1 Not shown, in addition to FIG. 1 The function entities shown, FIG. 1 Other function entities can also be included. In addition, the method provided by the embodiments of the present application can be applied to FIG. 1 The control system shown, of course, the method provided by the embodiments of the present application can also be applicable to the control system in other thermal management scenarios with cooling (heat dissipation) requirements.

[0110] As an important component of a vehicle, a thermal management system can regulate the temperature of devices in the vehicle (e.g., an oil-water heat exchanger, a motor controller, a vehicle charging device, etc.). Some thermal management systems are provided in this solution, which are mainly classified into two categories: one supports controlling the flow rate of coolant flowing through the oil-water heat exchanger, and the other supports controlling the flow rate of oil flowing through the oil-water heat exchanger. The two categories of thermal management systems are described below.

[0111] The first category of thermal management systems supports controlling the flow rate of coolant flowing through the oil-water heat exchanger. The first category of thermal management systems can refer to the relevant descriptions of FIG. 2 , FIGS. 3A-3C , FIG. 4 , FIGS. 5A-5B or FIG. 6 .

[0112] Referring to FIG. 2 , FIG. 2 is a schematic diagram of a thermal management system provided in an embodiment of the present application. In FIG. 2 , the thermal management system includes a first closed loop, which includes a first water pump 10, a heat dissipation component 20, a heat generating component 30, and an oil-water heat exchange system 40.

[0113] The first water pump 10 is used to output coolant to the first closed loop and drive the flow of the coolant in the first closed loop. The first water pump 10 can control the flow rate of the coolant in the first closed loop (or the total flow rate of the coolant in the first closed loop). By adjusting the parameters such as the rotation speed, the inlet pressure, and the outlet pressure of the first water pump 10, the total flow rate of the coolant in the first closed loop can be increased or decreased.

[0114] Exemplarily, the coolant can be water, a glycol solution, or the like.

[0115] The heat dissipation component 20 is used to dissipate heat from the coolant in the first closed loop. Exemplarily, the heat dissipation component 20 can be a radiator, which can be connected with a fan to increase the heat dissipation effect of the heat dissipation component 20. In some solutions, the heat dissipation component 20 can also be an evaporator. In this case, the first closed loop including the heat dissipation component 20 means that the first closed loop includes the coolant flow channel of the evaporator. Therefore, the thermal management system includes a refrigerant loop, which includes the refrigerant flow channel of the evaporator and a compressor. The compressor is used to compress the low-temperature and low-pressure refrigerant to obtain high-temperature and high-pressure refrigerant output, and to provide power for the circulation of the refrigerant in the refrigerant loop.

[0116] The heating component 30 includes a motor controller and / or an on-board charging device. Exemplarily, when the on-board charging device is obtained by integrating both an on-board charger (OBC) and a DC-DC converter, the on-board charging device can also be referred to as a two-in-one module; when the on-board charging device is obtained by integrating an OBC, a junction box, and a DC-DC converter, the on-board charging device can also be referred to as a three-in-one module.

[0117] The oil-water heat exchange system 40 includes a first valve 401, a coolant flow channel of an oil-water heat exchanger 402, and a first connecting head 403, wherein the first valve 401, the coolant flow channel of the oil-water heat exchanger 402, and the first connecting head 403 are sequentially connected to form a first branch, and the first valve 401 and the first connecting head 403 are sequentially connected to form a second branch parallel to the first branch. That is, the flow direction of the coolant in the first branch is: the first valve 401→the oil-water heat exchanger 402→the first connecting head 403; and the flow direction of the coolant in the second branch is: the first valve 401→the first connecting head 403.

[0118] The first valve 401 is used to control the flow of the coolant in the first closed loop. The first valve 401 has one inlet (i.e., a first inlet) and two outlets (i.e., a first outlet and a second outlet), wherein the first inlet is denoted as d 10 , the first outlet is denoted as d 11 , and the second outlet is denoted as d 12 .

[0119] The oil-water heat exchanger 402 is used to realize heat transfer between the coolant flowing through the oil-water heat exchanger 402 and the oil of the motor. In some schemes, the oil-water heat exchanger can also be referred to as an oil-cooled heat sink or an oil-cooled heat exchanger. The oil-water heat exchanger 402 includes an oil flow channel and a coolant flow channel. Here, the interface of the coolant flow channel of the oil-water heat exchanger 402 includes a first interface and a second interface, wherein the first interface is an inlet interface, and the first interface is denoted as d 21 ; the second interface is an outlet interface, and the second interface is denoted as d 22 .

[0120] The first connecting head 403 is used to control the flow direction of the coolant. Here, the first connecting head 403 is a three-way valve, and the first connecting head 403 has three valve ports, i.e., a first valve port, a second valve port, and a third valve port, wherein the first valve port and the second valve port are both inlets, and the third valve port is an outlet. As FIG. 2 , the first valve port is denoted as d 31 , the second valve port is denoted as d 32 , and the third valve port is denoted as d 33 .

[0121] In one implementation, the first valve 401 is a three-way proportional valve and the first connector 403 is a three-way valve. The connection of the oil-water heat exchange system 40 can be seen from the following FIG. 3A In FIG. 3A , the first inlet of the first valve 401 (i.e., the above-mentioned d 10 ) is used to receive the coolant in the first closed loop, the first outlet of the first valve 401 (i.e., the above-mentioned d 11 ) is connected with the first valve port (i.e., the above-mentioned d 31 ) of the first connector 403 through the coolant flow channel of the oil-water heat exchanger 402 to form the above-mentioned first branch, the second outlet of the first valve 401 (i.e., the above-mentioned d 12 ) is connected with the second valve port (i.e., the above-mentioned d 32 ) of the first connector 403 to form the above-mentioned second branch, and the third valve port (i.e., the above-mentioned d 33 ) of the first connector 403 converges the coolant output from the first valve port (i.e., the above-mentioned d 31 ) of the first connector 403 and the second valve port (i.e., the above-mentioned d 32 ) of the first connector 403.

[0122] In FIG. 3A , in the first branch, the first outlet of the first valve 401 (i.e., the above-mentioned d 11 ) is connected with the first interface (i.e., the above-mentioned d 21 ) of the coolant flow channel of the oil-water heat exchanger 402, and the second interface (i.e., the above-mentioned d 22 ) of the coolant flow channel of the oil-water heat exchanger 402 is connected with the first valve port (i.e., the above-mentioned d 31 ) of the first connector 403.

[0123] In FIG. 3A , the first valve 401 can proportionally control the flow of the coolant flowing through the first branch and the second branch in the first closed loop. It can be understood that the sum of the flow of the coolant flowing through the first branch and the flow of the coolant flowing through the second branch is the total flow of the coolant in the first closed loop. In the case that the total flow of the coolant in the first closed loop is constant, if the flow of the coolant flowing through the first branch decreases, the flow of the coolant flowing through the second branch will increase. In particular, if the flow of the coolant flowing through the first branch is zero, the flow of the coolant flowing through the second branch is the total flow of the coolant in the first closed loop. Here, the flow of the coolant flowing through the first branch is zero, which means that the coolant does not pass through the oil-water heat exchanger 402.

[0124] In another implementation, the first valve 401 includes a first solenoid valve 4011 and a first three-way valve 4012, and the first connector 403 is a second three-way valve. The connection of the oil-water heat exchange system 40 can be seen from the following FIG. 3B InFIG. 3B In the middle, the first three-way valve 4012 has three valve ports, namely the first valve port (denoted as d). 13 ), second valve port (denoted as d) 14 ) and the third valve port (denoted as d) 15 The first solenoid valve 4011 has one inlet (denoted as d). 16 ) and an outlet (denoted as d) 17 The first solenoid valve 4011 is used to control the conduction of the first branch.

[0125] For example, in FIG. 3B In the middle, the first valve port of the first three-way valve 4012 (i.e., d) 13 ) is used to receive coolant in the first closed-loop circuit, and the second valve port (i.e., d) of the first three-way valve 4012 14 The coolant flows sequentially through the first solenoid valve 4011, the oil-water heat exchanger 402, and the first valve port of the first connector 403 (i.e., the aforementioned d). 31 The first branch is formed by connecting the first three-way valve 4012, and the third valve port (i.e., d) is connected to form the first branch. 15 ) and the second valve port (i.e. d) of the first connector 403 32 The connection forms the second branch, and the third valve port (i.e., d) of the first connector 403 33 ) Connect the first valve port (i.e., d) of the first connector 403 31 ) and the second valve port (i.e. d) of the first connector 403 32 The coolant outputs from both are combined and output. It can be seen that, compared to the above... FIG. 2 , FIG. 2 The first inlet (d) of the first valve 401 10 ) is the first valve port (i.e., d) of the first three-way valve 4012. 13 ), FIG. 2 The first outlet (d) of the first valve 401 in the middle 11 ) is the outlet of the first solenoid valve 4011 (i.e., d) 17 ), FIG. 2 The second outlet (d) of the first valve 401 12 ) is the third valve port (i.e., d) of the first three-way valve 4012. 15 ).

[0126] exist FIG. 3B In the first branch, the second valve port (i.e., d) of the first three-way valve 4012 14 ) and the inlet of the first solenoid valve 4011 (i.e., d 15 ) connection, the outlet of the first solenoid valve 4011 (i.e., d) 12 The first interface between the oil-water heat exchanger 402 and the coolant flow channel (i.e., the aforementioned d) 21The second interface of the coolant flow channel of the oil-water heat exchanger 402 (i.e., the aforementioned d) is connected. 22 ) and the first valve port of the first connector 403 (i.e., the aforementioned d) 31 )connect.

[0127] exist FIG. 3B In this circuit, the first solenoid valve 4011 is used to control the conduction of the first branch. When the first solenoid valve 4011 is closed, the first branch is not conducted, and the flow rate of coolant flowing through the first branch is zero. The flow rate of coolant flowing through the first branch is the total flow rate of coolant in the first closed loop. When the first solenoid valve 4011 is open, the first branch is conducted, and the first branch and the second branch divide the total flow rate of coolant in the first closed loop. For example, the first branch and the second branch divide the total flow rate of coolant in the first closed loop in a 1:1 ratio.

[0128] In some schemes, FIG. 3B Based on this, the first valve 401 also includes a second solenoid valve 4013. The second solenoid valve 4013 is disposed on the second branch and is used to control the conduction of the second branch. Please refer to [link to relevant documentation]. FIG. 3C .exist FIG. 3C In the middle, the second solenoid valve 4013 has one inlet (denoted as d). 18 ) and an outlet (denoted as d) 19 The third valve port (i.e., d) of the aforementioned first three-way valve 4012. 15 ) and the second valve port (i.e. d) of the first connector 403 32 The connection to form the second branch refers to the third valve port (i.e., d) of the first three-way valve 4012. 15 ) through the second solenoid valve 4013 and the second valve port (i.e. d) of the first connector 403 32 The connection forms the second branch, wherein the third valve port (i.e., d) of the first three-way valve 4012 15 ) and the inlet of the second solenoid valve 4013 (i.e., d 18 ) connection, the outlet of the second solenoid valve 4013 (i.e., d) 19 ) and the second valve port (i.e. d) of the first connector 403 32 )connect.

[0129] exist FIG. 3C In the first closed-loop circuit, when the first solenoid valve 4011 is open and the second solenoid valve 4013 is closed, the coolant in the first closed-loop circuit flows through the first branch; when the first solenoid valve 4011 is closed and the second solenoid valve 4013 is open, the coolant in the first closed-loop circuit flows through the second branch; when the first solenoid valve 4011 is open and the second solenoid valve 4013 is open, the coolant in the first closed-loop circuit flows through both the first branch and the second branch.

[0130] Hereinabove FIG. 2 , FIG. 3A , FIG. 3B and FIG. 3C are merely examples of the heat management system. For example, FIG. 2 , FIG. 2 are merely examples of the first water pump 10, the heat dissipation component 20, the heat generating component 30 and the oil-water heat exchanger system 40 being connected in series to form the first closed loop, and the positions of the first water pump 10, the heat dissipation component 20, the heat generating component 30 and the oil-water heat exchanger system 40 in the first closed loop are merely shown in FIG. 2 . In some solutions, the oil-water heat exchanger system 40 can be exchanged with the first water pump 10, or the oil-water heat exchanger system 40 can be exchanged with the heat generating component 30, or the heat generating component 30 can be exchanged with the heat dissipation component 20, etc.

[0131] In some solutions, when the number of heat generating components is more than one, for example, including the above-mentioned motor controller and the on-board charging device, the oil-water heat exchanger system 40 can be connected in series between the motor controller and the on-board charging device, or the motor controller and the on-board charging device can be connected in series and then connected in series with the oil-water heat exchanger system 40. That is, when the number of heat generating components is more than one, the plurality of heat generating components can be connected in series in the first closed loop, or can be arranged separately.

[0132] It can be understood that the above-mentioned FIGS. 3A-3C are some examples of FIG. 2 .

[0133] In the above-mentioned solutions, in the first closed loop in which the water pump, the heat generating component and the oil-water heat exchanger are located, a first valve is arranged at the inlet of the oil-water heat exchanger and a first connecting head is arranged at the outlet of the oil-water heat exchanger, a bypass branch (i.e. a second branch) is established for the cooling liquid flow channel of the oil-water heat exchanger through the connection of the first valve and the first connecting head, and the first valve can realize independent control of the flow of the cooling liquid flowing through the oil-water heat exchanger, thereby realizing decoupling of the control of the flow of the cooling liquid between the oil-water heat exchanger and the heat generating component. In this way, when the oil temperature of the motor is low, the cooling liquid in the first closed loop can not flow through or less flow through the oil-water heat exchanger, and the oil temperature of the motor will not be reduced, and at the same time, the cooling of other devices (for example, the heat generating component) in the first closed loop will not be affected. In addition, the self-heating of the motor during operation can also warm up the oil of the motor, which is beneficial to improve the electric drive efficiency and the low-temperature endurance of the vehicle.

[0134] In some possible embodiments, in combination with the heat management system shown in FIG. 2 , a bypass branch can also be established for the heat dissipation component 20 in FIG. 2 to realize control of the flow of the cooling liquid flowing through the heat dissipation component 20. For example, see FIG. 4As shown, the first closed loop further comprises a second valve 21 and a second connector 22. The second valve 21, the heat dissipation component 20 and the second connector 22 are sequentially connected to form a third branch, and the second valve 21 and the second connector 22 are sequentially connected to form a fourth branch parallel to the third branch. That is, the flow direction of the coolant in the third branch is: the second valve 21→the heat dissipation component 20→the second connector 22; and the flow direction of the coolant in the fourth branch is: the second valve 21→the second connector 22. FIG. 4 The oil-water heat exchange system 40 can be specifically FIGS. 3A-3C The connection mode shown in the corresponding part of any one is not described here.

[0135] The second valve 21 is used to control the flow of the coolant in the first closed loop through the third branch. The second valve 21 has one inlet (i.e., a first inlet) and two outlets (i.e., a first outlet and a second outlet), wherein the first inlet is denoted as d 210 , the first outlet is denoted as d 211 , and the second outlet is denoted as d 212 .

[0136] Here, the heat dissipation component 20 is used to dissipate heat for the coolant flowing through the third branch. When the heat dissipation component is a radiator, the interface of the heat dissipation component 20 includes a first interface and a second interface, wherein the first interface (denoted as d 201 ) is an inlet interface and the second interface (denoted as d 202 ) is an outlet interface. In some schemes, when the heat dissipation component is an evaporator, the interface of the heat dissipation component 20 includes not only the inlet of the coolant flow channel of the evaporator (denoted as d 201 ) and the outlet of the coolant flow channel of the evaporator (denoted as d 202 ), but also the inlet of the refrigerant flow channel of the evaporator and the outlet of the refrigerant flow channel of the evaporator.

[0137] The second connector 22 is used to control the flow direction of the coolant. Here, the second connector 22 is a three-way valve, and the second connector 22 has three valve ports, i.e., a first valve port, a second valve port and a third valve port, wherein the first valve port and the second valve port are both inlets, and the third valve port is an outlet. As FIG. 4 , the first valve port is denoted as d 221 , the second valve port is denoted as d 222 , and the third valve port is denoted as d 223 .

[0138] In an implementation manner, the second valve 21 is a three-way proportional valve and the second connector 22 is a three-way valve, and the connection mode of the second valve 21, the heat dissipation component 20 and the second connector 22 can refer to FIG. 5A . In FIG. 5A , the first inlet of the second valve 21 (i.e., d 210The first outlet of the second valve 21 (i.e., d) is used to receive coolant from the first closed-loop circuit. 211 The first valve port (i.e., d) of the heat dissipation component 20 and the second connector 22 221 The connection forms the third branch, the second outlet of the second valve 21 (i.e., d) 212 ) and the second valve port (i.e. d) of the second connector 22 222 The fourth branch is formed by connecting the second connector 22 to the third valve port (i.e., d). 223 ) is used to connect the first valve port (i.e., d) from the second connector 22. 221 ) and the second valve port (i.e. d) of the second connector 22 222 The coolant is collected and output.

[0139] exist FIG. 5A In the third branch, the first outlet of the second valve 21 (i.e., d) 211 ) and the first interface (i.e. d) of the heat dissipation component 20 201 ) connection, the second interface of the heat dissipation component 20 (i.e., d) 202 ) and the first valve port (i.e. d) of the second connector 22 221 (Connection). It can be understood that when the heat dissipation component 20 is an evaporator, the first interface of the heat dissipation component 20 is the inlet of the coolant flow channel of the evaporator, and the second interface of the heat dissipation component 20 (i.e., d...) 202 () is the outlet of the coolant flow channel of the evaporator.

[0140] Understandable, FIG. 5A In the first closed-loop circuit, the second valve 21 can proportionally adjust the flow rate of coolant flowing through the third and fourth branches. The sum of the flow rate of coolant flowing through the third branch and the flow rate of coolant flowing through the fourth branch is the total flow rate of coolant in the first closed-loop circuit.

[0141] In another implementation, the second valve 21 includes a three-way valve 2101 and a solenoid valve 2102, and the second connector 22 is a three-way valve. For the connection method of the second valve 21, the heat dissipation component 20, and the second connector 22, please refer to [link to relevant documentation]. FIG. 5B As shown. In FIG. 5B In the middle, the three-way valve 2101 has three valve ports, namely the first valve port (i.e., the aforementioned d) 213 ), second valve port (denoted as d) 214 ) and the third valve port (i.e., the aforementioned d) 215 The solenoid valve 2102 has one inlet (denoted as d). 216 ) and an outlet (i.e., the above d) 217 ).

[0142] exist FIG. 5B In the middle, the first valve port of the three-way valve 2101 (i.e., d) 213The second port of the three-way valve 2101 (i.e., d) is used to receive coolant in the first closed-loop circuit. 214 ) sequentially through solenoid valve 2102, heat dissipation component 20 and the first valve port (i.e. d) of second connector 22 221 The connection forms the third branch, and the third valve port (i.e., d) of the three-way valve 2101 215 ) sequentially connects to the second valve port (i.e., d) of the second connector 22. 222 The connection forms the fourth branch, and the third valve port (i.e., d) of the second connector 22. 223 ) connect the first valve port (i.e., d) of the second connector 22 221 ) and the second valve port of the second connector 22 (i.e., d 222 The coolant outputs from both are combined and output. It can be seen that, compared to the above... FIG. 4 , FIG. 4 The first inlet (d) of the second valve 21 210 ) is the first valve port of the three-way valve 2101 (i.e., d) 213 ), FIG. 4 The first outlet (d) of the second valve 21 211 ) is the outlet of solenoid valve 2102 (i.e., d) 217 ), FIG. 4 The second outlet (d) of the second valve 21 212 ) is the third valve port (i.e., d) of the three-way valve 2101. 215 ).

[0143] For example, in the third branch, the third valve port (i.e., d) of the three-way valve 2101 215 ) and the inlet of solenoid valve 2102 (i.e., d 216 ) connection, the outlet of solenoid valve 2102 (i.e., d) 217 ) and the first interface (i.e. d) of the heat dissipation component 20 201 ) connection, the second interface of the heat dissipation component 20 (i.e., d) 202 ) and the first valve port (i.e. d) of the second connector 22 221 )connect.

[0144] Here, solenoid valve 2102 is used to control the conduction of the third branch. When solenoid valve 2102 is closed, the third branch is not conducted, so the flow rate of coolant through the third branch is zero, and the flow rate of coolant through the fourth branch is the total flow rate of coolant in the first closed loop. When solenoid valve 2102 is open, the third branch is conducted, and the third branch and the fourth branch divide the total flow rate of coolant in the first closed loop. For example, the third branch and the fourth branch divide the total flow rate of coolant in the first closed loop in a 1:1 ratio.

[0145] In some schemes, FIG. 5BIn the second valve 21, the second valve 21 further comprises an electromagnetic valve 2103, the electromagnetic valve 2103 is arranged on the fourth branch, and the electromagnetic valve 2103 is used for controlling conduction of the fourth branch. The electromagnetic valve 2103 has an inlet (indicated as d 218 ) and an outlet (indicated as d 219 ). The third valve port (indicated as d 215 ) of the three-way valve 2101 is connected with the second valve port (indicated as d 222 ) of the second connecting head 22 in sequence to form the fourth branch, which means that the third valve port (indicated as d 215 ) of the three-way valve 2101 is connected with the second valve port (indicated as d 222 ) of the second connecting head 22 through the electromagnetic valve 2103 to form the fourth branch, wherein the third valve port (indicated as d 215 ) of the three-way valve 2101 is connected with the inlet (indicated as d 218 ) of the electromagnetic valve 2103, and the outlet (indicated as d 219 ) of the electromagnetic valve 2103 is connected with the second valve port (indicated as d 222 ) of the second connecting head 22. In this case, the first inlet (indicated as d 210 ) of the second valve 21 in the FIG. 4 , FIG. 4 is the first valve port (indicated as d 213 ) of the three-way valve 2101, FIG. 4 the first outlet (indicated as d 211 ) of the second valve 21 is the outlet (indicated as d 217 ) of the electromagnetic valve 2102, FIG. 4 the second outlet (indicated as d 212 ) of the second valve 21 is the outlet (indicated as d 219 ) of the electromagnetic valve 2103.

[0146] It can be understood that the above-mentioned FIGS. 5A-5B are some examples of FIG. 4 .

[0147] In some schemes, in the FIG. 4 , the first valve 401 and the first connecting head 403 can also not be arranged, that is, one end of the cooling liquid flow channel of the oil-water heat exchanger 402 is connected with the first water pump 10, and the other end of the cooling liquid flow channel of the oil-water heat exchanger 402 is connected with the heat generating component 30.

[0148] FIG. 2 The structure shown in FIG. 2 can meet the cooling demand of the oil-water heat exchanger. On the basis of FIG. 2 , the structure shown in FIG. 4 is obtained, that is, a bypass branch is added to the heat dissipating component in the first closed loop circuit, the flow of the cooling liquid flowing through the heat dissipating component can be flexibly controlled according to the temperature of other heat generating components in the first closed loop circuit, and thus the cooling demand of the heat generating component can also be met.

[0149] In some possible embodiments, when applied to a hybrid type vehicle, the heat management system in combination with FIG. 2 the heat management system shown in FIG. 1, see FIG. 6 for example. In this way, when the oil temperature of the electric motor is low, the engine waste heat can also be used to heat the oil-water heat exchanger to heat the oil of the electric motor.

[0150] In FIG. 6 , the heat management system further comprises a second closed loop circuit, which comprises the second water pump 12, the engine waste heat exchanger 50, the electromagnetic valve 52, and the cooling liquid flow channel of the oil-water heat exchanger 402.

[0151] The second water pump 12 is used to output cooling liquid to the second closed loop circuit and drive the flow of the cooling liquid in the second closed loop circuit. The engine waste heat exchanger 50 is used to collect the waste heat generated by the engine. The electromagnetic valve 52 is used to control the conduction of the second closed loop circuit.

[0152] For example, in FIG. 6 , the flow direction of the cooling liquid in the second closed loop circuit is the second water pump 12→the engine waste heat exchanger 50→the electromagnetic valve 52→the oil-water heat exchanger 402→the second water pump 12. The cooling liquid flow channel of the oil-water heat exchanger 402 in the second closed loop circuit is the same as the cooling liquid flow channel of the oil-water heat exchanger 402 in the first closed loop circuit, so the interface of the cooling liquid flow channel of the oil-water heat exchanger 402 includes a third interface (denoted as d 21 ) and a fourth interface (denoted as d 22 ) in addition to the first interface (i.e., the above d 23 ) and the second interface (i.e., the above d 24 ). The third interface serves as an inlet interface, and the fourth interface serves as an outlet interface. It can be understood that the cooling liquid flow channel of the oil-water heat exchanger 402 has four interfaces, which means that the two ends of the cooling liquid flow channel of the oil-water heat exchanger 402 each integrate a three-way valve (or the two three-way valves can also be independently arranged). In this case, the outlet of the second water pump 12 is connected to one end of the engine waste heat exchanger 50, the other end of the engine waste heat exchanger 50 is connected to one end of the electromagnetic valve 52, the other end of the electromagnetic valve 52 is connected to the third interface (i.e., d 23 ) of the oil-water heat exchanger 402, and the fourth interface (i.e., d 24 ) of the oil-water heat exchanger 402 is connected to the inlet of the second water pump 12.

[0153] In some schemes, in FIG. 6 , the engine waste heat exchanger 50 can also be replaced by an engine. In addition, FIG. 6 , the oil-water heat exchange system 40 can adopt the connection mode shown in FIGS. 3A-3C any of the corresponding parts, which will not be described here. It can be understood that,FIG. 6 As an example of utilizing the engine waste heat to heat the oil-water heat exchanger based on the heat management system shown in FIG. 2 .

[0154] In some possible embodiments, FIG. 6 The second closed loop shown can also be combined with the heat management system shown in FIG. 4 , FIG. 5A or FIG. 5B , and the combination manner can be similar to the description of the corresponding content in the above FIG. 6 , which will not be described here again.

[0155] The second type of heat management system: support the flow of oil through the oil-water heat exchanger. The second type of heat management system please refer to the following FIG. 7 or FIGS. 8A-8C related description.

[0156] Referring to FIG. 7 , FIG. 7 is another schematic diagram of a heat management system provided by the embodiments of the present application. In FIG. 7 , the heat management system includes a first closed loop and a second closed loop, wherein the first closed loop includes a motor 60, an oil pump 62, and an oil-water heat exchange system 40. The second closed loop includes a cooling liquid flow channel of the oil-water heat exchanger 402 and a first water pump 10. In some schemes, in FIG. 7 , the second closed loop further includes a heat dissipation component 20 and a heat generation component 30, which please refer to the description of the corresponding content in the FIG. 2 embodiments, which will not be described here again.

[0157] The motor 60, also known as the electric motor, is a device that converts electrical energy into mechanical energy, used to provide power for the vehicle.

[0158] The above-mentioned oil pump 62 is used to output oil to the first closed loop, and drive the flow of oil in the first closed loop.

[0159] In FIG. 7 , the oil-water heat exchange system 40 includes a first valve 401, an oil flow channel of the oil-water heat exchanger 402, and a first connecting head 403, wherein the first valve 401, the oil flow channel of the oil-water heat exchanger 402, and the first connecting head 403 are connected in sequence to form a first branch, and the first valve 401 and the first connecting head 403 are connected in sequence to form a second branch parallel to the first branch. In FIG. 7 , the flow direction of the oil in the first branch is: the first valve 401→the oil-water heat exchanger 402→the first connecting head 403; and the flow direction of the oil in the second branch is: the first valve 401→the first connecting head 403.

[0160] The oil-water heat exchanger 402 is used to transfer heat between the oil flowing through it and the coolant flowing through it. The oil-water heat exchanger 402 includes an oil flow channel and a coolant flow channel, wherein the two ends of the oil flow channel of the oil-water heat exchanger 402 are respectively the first interface (denoted as d). 25 ) and the second interface (represented as d) 26 The two ends of the coolant flow channel of the oil-water heat exchanger 402 are the first interface (denoted as d). 21 ) and the second interface (represented as d) 22 ).

[0161] exist FIG. 7 In this circuit, the first valve 401 is used to control the flow rate of oil in the first closed-loop circuit through the first branch. The first valve 401 has a first inlet (i.e., d...). 10 ), First Exit (d) 11 ) and the second exit (i.e., d 12 ).

[0162] exist FIG. 7 In this process, the first connector 403 is used to control the flow direction of the oil. The first connector 403 has three valve ports, namely the first valve port (i.e., d) 31 ), second valve port (i.e. d) 32 ) and the third valve port (i.e., d) 33 ).exist FIG. 7 In the middle, d 31 and d 32 Both serve as entry points, d 33 As an export.

[0163] In one implementation, the first valve 401 is a three-way proportional valve and the first connector 403 is a three-way valve. For the connection method of the oil-water heat exchange system 40, please refer to [link to relevant documentation]. FIG. 8A As shown. In FIG. 8A In the middle, the first inlet of the first valve 401 (i.e., the aforementioned d) 10 ) is used to receive oil in the first closed-loop circuit, and the first outlet of the first valve 401 (i.e., d) 11 The oil flows through the oil-water heat exchanger 402 and connects to the first valve port (i.e., d) of the first connector 403. 31 The first branch is formed by connecting the first valve 401 to its second outlet (i.e., the aforementioned d). 12 ) and the second valve port (i.e. d) of the first connector 403 32 The connection forms the second branch, and the third valve port of the first connector 403 (i.e., the aforementioned d) 33 ) Connect the first valve port (i.e., d) of the first connector 403 31 ) and the second valve port (i.e. d) of the first connector 403 32 The oil outputs from both are combined and output.

[0164] In FIG. 8A , for the first branch, the first outlet (i.e., d 11 ) of the first valve 401 is connected with the first interface (i.e., d 25 ) of the oil flow channel of the oil-water heat exchanger 402, and the second interface (i.e., d 26 ) of the oil flow channel of the oil-water heat exchanger 402 is connected with the first valve port (i.e., d 31 ) of the first connecting head 403.

[0165] In FIG. 8A , the first valve 401 can control the flow of the oil liquid in the first closed loop circuit through the first branch and the second branch in proportion. It can be understood that the sum of the flow of the oil liquid through the first branch and the flow of the oil liquid through the second branch is the flow of the oil pump 62 output to the first closed loop circuit (or the total flow of the oil liquid in the first closed loop circuit). In the case that the total flow of the oil liquid in the first closed loop circuit is unchanged, if the flow of the oil liquid through the first branch decreases, the flow of the oil liquid through the second branch will increase. In particular, if the flow of the oil liquid through the first branch is zero, the flow of the oil liquid through the second branch is the total flow of the oil liquid in the first closed loop circuit. Here, the flow of the oil liquid through the first branch is zero, which means that the oil liquid does not pass through the oil-water heat exchanger 402.

[0166] In another implementation, the first valve 401 includes a first electromagnetic valve 4011 and a first three-way valve 4012, and the first connecting head 403 is a second three-way valve. The connection mode of the oil-water heat exchange system 40 can be referred to FIG. 8B . In FIG. 8B , the first three-way valve 4012 has three valve ports, i.e., a first valve port (i.e., d 13 ), a second valve port (i.e., d 14 ), and a third valve port (i.e., d 15 ), and the first electromagnetic valve 4011 has an inlet (i.e., d 16 ) and an outlet (i.e., d 17 ). The first electromagnetic valve 4011 is used to control the conduction of the first branch.

[0167] In FIG. 8B , the first valve port (i.e., d 13 ) of the first three-way valve 4012 is used to receive the oil liquid in the first closed loop circuit, the second valve port (i.e., d 14 ) of the first three-way valve 4012 is connected with the first valve port (i.e., d 31 ) of the first connecting head 403 through the first electromagnetic valve 4011 and the oil flow channel of the oil-water heat exchanger 402 to form the first branch, and the third valve port (i.e., d 15 ) of the first three-way valve 4012 is connected with the second valve port (i.e., d32 The connection forms the second branch, and the third valve port (i.e., d) of the first connector 403 33 The first valve port (i.e., d) from the first connector 403 will be used. 31 ) and the second valve port (i.e. d) of the first connector 403 32 The oil is collected and output. It can be seen that, compared to the above... FIG. 7 , FIG. 7 The first inlet (d) of the first valve 401 10 ) is the first valve port (i.e., d) of the first three-way valve 4012. 13 ), FIG. 7 The first outlet (d) of the first valve 401 in the middle 11 ) is the outlet of the first solenoid valve 4011 (i.e., d) 17 ), FIG. 7 The second outlet (d) of the first valve 401 12 ) is the third valve port (i.e., d) of the first three-way valve 4012. 15 ).

[0168] exist FIG. 8B In this circuit, the first solenoid valve 4011 is used to control the conduction of the first branch. When the first solenoid valve 4011 is closed, the first branch is not conducted, and the flow rate of the oil flowing through the first branch is zero. The flow rate of the oil flowing through the first branch is the total flow rate of the oil in the first closed loop. When the first solenoid valve 4011 is open, the first branch is conducted, and the first branch and the second branch divide the total flow rate of the oil in the first closed loop. For example, the first branch and the second branch divide the total flow rate of the oil in the first closed loop in a 1:1 ratio.

[0169] In some schemes, FIG. 8B Based on this, the first valve 401 also includes a second solenoid valve 4013. The second solenoid valve 4013 is disposed on the second branch and is used to control the conduction of the second branch. Please refer to [link to relevant documentation]. FIG. 8C .exist FIG. 8C In the middle, the second solenoid valve 4013 has one inlet (i.e., d) 18 ) and an outlet (i.e., d) 19 ).exist FIG. 8B In the middle, the third valve port (i.e., d) of the first three-way valve 4012 15 ) through the second solenoid valve 4013 and the second valve port (i.e. d) of the first connector 403 32 The connection forms the second branch, wherein the third valve port (i.e., d) of the first three-way valve 4012 15 ) and the inlet of the second solenoid valve 4013 (i.e., d 18 ) connection, the outlet of the second solenoid valve 4013 (i.e., d) 19 ) and the second valve port (i.e. d) of the first connector 40332 ) connection.

[0170] In FIG. 8C , when the first electromagnetic valve 4011 is open and the second electromagnetic valve 4013 is closed, the oil in the first closed loop circuit flows through the first branch; when the first electromagnetic valve 4011 is closed and the second electromagnetic valve 4013 is open, the oil in the first closed loop circuit flows through the second branch; when the first electromagnetic valve 4011 is open and the second electromagnetic valve 4013 is open, the oil in the first closed loop circuit flows through both the first branch and the second branch.

[0171] It can be understood that the above FIGS. 8A-8C are some examples of FIG. 7 .

[0172] In the above scheme, in the first closed loop circuit in which the oil flow channels of the oil pump, the motor and the oil-water heat exchanger are located, a first valve is arranged at the inlet of the oil-water heat exchanger and a first connecting head is arranged at the outlet of the oil-water heat exchanger, a bypass branch (i.e. the second branch) is established for the oil flow channel of the oil-water heat exchanger through the connection of the first valve and the first connecting head, and the first valve can independently control the flow of the oil flowing through the oil-water heat exchanger. For example, when the oil temperature of the motor is low, the oil in the first closed loop circuit can not flow through or less flow through the oil-water heat exchanger, and the oil temperature of the motor will not be reduced by the cooling liquid flowing through the oil-water heat exchanger. At the same time, the motor self-heating can also heat the oil of the motor, which is beneficial to improve the electric drive efficiency and the low-temperature endurance of the vehicle.

[0173] In addition, the embodiment of the present application also provides a motor system, which is exemplified with reference to FIG. 9A . FIG. 9A is a schematic diagram of a motor system provided by the embodiment of the present application. In FIG. 9A , the motor system includes a first closed loop circuit, wherein the first closed loop circuit includes a motor 60, an oil pump 62, a first valve 401 and a first connecting head 403.

[0174] The first valve 401 has one inlet (i.e. d 10 ) and two outlets, i.e. a first outlet (i.e. d 11 ) and a second outlet (i.e. d 12 ). The first connecting head 403 has three valve ports, i.e. d 31 , d 32 and d 33 . In FIG. 9A , d 31 and d 32 are both inlets, and d 31 can be referred to as a first inlet of the first connecting head 403, and d 32 is referred to as a second inlet of the first connecting head 403; d33 As an export, then d 33 This can be referred to as the outlet of the first connector 403.

[0175] exist FIG. 9A In the middle, the inlet of the first valve 401 (i.e., d) 10 ) is used to receive the oil output from the oil pump 62, and the first outlet of the first valve 401 (i.e., d) 11 ) and the first inlet (i.e. d) of the first connector 403 31 ) are respectively used to connect the two ends of the oil flow channel of the oil-water heat exchanger 402, and the second outlet of the first valve 401 (i.e., d) 12 ) and the second inlet (i.e. d) of the first connector 403 32 ) connection, the outlet of the first connector 403 (i.e., d) 33 ) is used to input the first inlet (i.e., d) from the first connector 403. 31 ) and the second inlet (i.e. d) of the first connector 403 32 The oil is collected and output, and the first valve 401 is used to adjust the flow rate of the oil flowing through the oil-water heat exchanger 402.

[0176] For example, by FIG. 7 It can be seen that the two ends of the oil flow channel of the oil-water heat exchanger 402 are the first interface (denoted as d). 25 ) and the second interface (represented as d) 26 ), then the first outlet of the first valve 401 (i.e., d) 11 ) and the first inlet (i.e. d) of the first connector 403 31 The first outlet (d11) of the first valve 401 is used to connect the two ends of the oil flow channel of the oil-water heat exchanger 402. 25 ), the first input of the first connector 403 (i.e., d) 31 The second interface (i.e., d) used to connect the oil flow channel of the oil-water heat exchanger 402 26 ).

[0177] In one implementation, FIG. 9A In the diagram, the first valve 401 is a three-way proportional valve, and the first connector 403 is a three-way valve. For the connection method between the first valve 401 and the first connector 403, please refer to [reference needed]. FIG. 8A The connection methods between the corresponding devices will not be described again here.

[0178] In another implementation, the first valve 401 includes a first solenoid valve 4011 and a first three-way valve 4012, and the first connector 403 is a second three-way valve. For the connection between the first valve 401 and the first connector 403, please refer to [reference needed]. FIG. 9B .existFIG. 9B In the middle, the first three-way valve 4012 has three valve ports, namely the first valve port (i.e., d) 13 ), second valve port (i.e. d) 14 ) and the third valve port (i.e., d) 15 The first solenoid valve 4011 has one inlet (i.e., d). 16 ) and an outlet (i.e., d) 17 ).exist FIG. 9B For the connection between the first solenoid valve 4011, the first three-way valve 4012, and the first connector 403, please refer to [reference needed]. FIG. 8B The connection methods between the corresponding devices are not described in detail here. (See also:) FIG. 9A , FIG. 9A The inlet of the first valve 401 (i.e., d) 10 )for FIG. 9B The first valve port (i.e., d) of the first three-way valve 4012 13 ), FIG. 9A The first outlet of the first valve 401 (i.e., d) 11 )for FIG. 9B The outlet of the first solenoid valve 4011 (i.e., d) 17 ), FIG. 9A The second outlet of the first valve 401 (i.e., d) 12 ) is the third valve port (i.e., d) of the first three-way valve 4012. 15 ).

[0179] In some schemes, FIG. 9B The first valve 401 shown may also include a second solenoid valve 4013, the second solenoid valve 4013 having an inlet (i.e., d) 18 ) and an outlet (i.e., d) 19 If the second solenoid valve 4013 is installed on the second branch, then... FIG. 9B For the connection between the first solenoid valve 4011, the first three-way valve 4012, the second solenoid valve 4013, and the first connector 403, please refer to [the relevant documentation / reference]. FIG. 8C The details of the connection methods between the corresponding components will not be repeated here. Thus, FIG. 9A The second outlet of the first valve 401 (i.e., d) 12 )for FIG. 9B The outlet of the second solenoid valve 4013 (i.e., d) 19 ).

[0180] In some solutions, the motor system further comprises the oil-water heat exchanger 402, in which case the first valve 401, the oil flow channel of the oil-water heat exchanger 402, and the first connecting head 403 are sequentially connected to form a first branch, and the first valve 401 and the first connecting head 403 are sequentially connected to form a second branch parallel to the first branch. For specific connection modes between devices on the first branch and the second branch, please refer to the description of the corresponding content above, which will not be repeated here. FIG. 7

[0181] It can be understood that the above FIG. 9B is an example of FIG. 9A .

[0182] In the motor system, by arranging the first valve and the first connecting head in the closed loop circuit where the motor and the oil pump are located, the connection of the first valve and the first connecting head can establish a bypass branch for the circulation of the oil, and the first valve makes it possible to independently control the flow of the oil flowing through the oil-water heat exchanger, which is suitable for different cooling needs of the oil of the motor. In the case where the oil temperature of the motor is low, the motor system can improve the electric drive efficiency and the low-temperature endurance capability of the vehicle.

[0183] Next, the thermal management control method provided by the embodiments of the present application will be described in combination with the above structure.

[0184] For the above-mentioned first type of thermal management system (for example FIG. 2 , FIGS. 3A-3C , FIG. 4 , FIGS. 5A-5B or FIG. 6 ), the embodiments of the present application provide a thermal management control method, which is described with reference to the method shown in FIG. 10 . FIG. 10 The method shown in FIG. 1 can be applied to the control device shown in FIG. 2 , FIG. 4 , FIG. 6 , etc. The control device can be used to control the thermal management system shown in any one of the above.

[0185] Among them, the thermal management system comprises a first closed loop circuit, the first closed loop circuit comprises a first water pump, a heat dissipation component, an oil-water heat exchange system and a heat generating component, the first water pump is used to output cooling liquid to the first closed loop circuit; the oil-water heat exchange system comprises a first valve, a first connecting head and a cooling liquid flow channel of an oil-water heat exchanger, the first valve, the cooling liquid flow channel of the oil-water heat exchanger and the first connecting head are sequentially connected to form a first branch, and the first valve and the first connecting head are sequentially connected to form a second branch parallel to the first branch, and the oil-water heat exchanger is used to realize heat transfer between the cooling liquid flowing through the oil-water heat exchanger and the oil of the motor.

[0186] Here, the control device is connected with the first water pump, the first valve, and the heat generating component.​FIG. 2 The heat management system shown is an example, and the implementation of the first valve is different, FIG. 2 which can be refined as the above FIG. 3A , FIG. 3B or FIG. 3C . In FIG. 3B , the control device is connected to the first valve, which means that the control device is connected to the first electromagnetic valve 4011. In FIG. 3C , the control device is connected to the first valve, which means that the control device is connected to the first electromagnetic valve 4011 and the second electromagnetic valve 4013 respectively.

[0187] S1001: Obtain temperature detection information, which includes the oil temperature of the motor.

[0188] In one implementation, the temperature detection information is obtained from at least one temperature sensor. For example, the at least one temperature sensor includes a temperature sensor for measuring the oil temperature of the motor, and the oil temperature of the motor is obtained from the temperature sensor. Here, the temperature sensor can be arranged inside the motor or at the outlet of the motor oil.

[0189] In some schemes, the at least one temperature sensor further includes a sensor for measuring the temperature of the heat generating component and a sensor for measuring the temperature at the inlet of the cooling liquid flow channel of the oil-water heat exchanger (hereinafter referred to as the temperature of the cooling liquid), so that the temperature of the heat generating component and the temperature of the cooling liquid can be obtained. The temperature detection information further includes the temperature of the heat generating component and the temperature of the cooling liquid.

[0190] S1002: According to the temperature detection information, adjust the flow of the cooling liquid through the first branch by controlling the first valve.

[0191] In one implementation, according to the temperature detection information, the flow of the cooling liquid through the first branch is adjusted by controlling the first valve, including: when the oil temperature of the motor is less than the first threshold, the first valve is controlled so that the flow of the cooling liquid through the first branch is zero or the flow of the cooling liquid through the first branch is less than the flow of the cooling liquid through the second branch. In this way, in the case where the oil temperature of the motor is low, the cooling liquid does not flow through or only a small part of the cooling liquid flows through the first branch of the oil-water heat exchanger, so that the oil flowing through the oil-water heat exchanger is not cooled or as little as possible. In some schemes, the condition of this embodiment also includes that the temperature of the cooling liquid is less than the oil temperature of the motor.

[0192] Here, the first threshold is set based on experience or factory system default. When the oil temperature of the motor is less than the first threshold, it means that the oil temperature of the motor is low or normal, i.e. the oil of the motor currently has no cooling demand, but has heat preservation or even heating demand.

[0193] As an example, the first valve is a three-way proportional valve, and the first connecting head is a three-way valve, for example, refer to the above FIG. 3A Before controlling the first valve, the control device determines that the flow rate of the coolant in the first closed loop is the first value, and obtains the flow rate ratio of the coolant flowing through the first branch as the first ratio value according to the first value and the oil temperature of the motor. Then, the above-mentioned control of the first valve includes: controlling the first valve based on the first ratio value. The first valve is a three-way proportional valve, which can control the flow rate ratio of the coolant flowing through the first branch and the second branch respectively, thereby improving the degree of control refinement and more accurately regulating the temperature.

[0194] As an example, the control device can obtain the flow rate of the coolant in the first closed loop by: obtaining parameters of the first water pump, the parameters of the first water pump including the current rotating speed of the first water pump, the inlet pressure of the first water pump, and the outlet pressure of the first water pump; and calculating the flow rate of the coolant in the first closed loop as the first value according to the parameters of the first water pump.

[0195] In a possible implementation, the flow rate ratio of the coolant flowing through the first branch is obtained as the first ratio value according to the first value and the oil temperature of the motor, including: searching for first mapping information according to the first value and the oil temperature of the motor to obtain the flow rate ratio of the coolant flowing through the first branch as the first ratio value, wherein the first mapping information includes a corresponding relationship among the first value, the oil temperature of the motor, and the first ratio value. In some schemes, the first ratio value can also be calculated according to the first value, the oil temperature of the motor, and the ideal oil temperature of the motor. The ideal oil temperature of the motor refers to the temperature that the oil of the motor is expected to reach.

[0196] It can be understood that, in the case of the same first value, the smaller the oil temperature of the motor, the smaller the first ratio value, and the higher the oil temperature of the motor, the larger the first ratio value.

[0197] In this way, by directly searching for the flow rate ratio corresponding to the oil temperature of the motor and the total flow rate of the coolant in the first closed loop in the preset first mapping information, the data processing efficiency is improved, and the temperature regulation rate is also improved.

[0198] As another example, the first valve includes a first electromagnetic valve and a first three-way valve, and the first connecting head is a second three-way valve, for example, refer to the above FIG. 3B Then, the above-mentioned control of the first valve includes: controlling the first electromagnetic valve to be closed. In combination with the above FIG. 3BIn a case where the oil temperature of the motor is less than the first threshold value, the first electromagnetic valve 4011 is controlled to be closed, so that the cooling liquid in the first closed loop flows through the second branch, and the flow rate of the cooling liquid flowing through the first branch is zero, that is, the flow rate of the cooling liquid flowing through the oil-water heat exchanger is zero, so that the oil of the motor flowing through the oil-water heat exchanger is not cooled, and the heat generated by the motor itself can gradually increase the oil temperature of the motor, greatly reducing the oil stirring loss and being beneficial to improving the electric drive efficiency.

[0199] Further, if the first valve further includes a second electromagnetic valve, the second electromagnetic valve is arranged on the second branch, for example, referring to the structure shown in FIG. 3C The control of the first valve includes: controlling the first electromagnetic valve to be closed and controlling the second electromagnetic valve to be opened. FIG. 3C In a case where the oil temperature of the motor is less than the first threshold value, the first electromagnetic valve 4011 is controlled to be closed and the second electromagnetic valve 4013 is controlled to be opened, so that the flow rate of the cooling liquid flowing through the first branch is zero, that is, the cooling liquid does not flow through the oil-water heat exchanger, so that the oil of the motor flowing through the oil-water heat exchanger is not cooled, and the heat generated by the motor itself can gradually increase the oil temperature of the motor, greatly reducing the oil stirring loss and being beneficial to improving the electric drive efficiency.

[0200] In some schemes, according to the temperature detection information, the flow rate of the cooling liquid flowing through the first branch is adjusted by controlling the first valve, and the method further includes: in a case where the oil temperature of the motor is less than the first threshold value and the temperature of the cooling liquid is greater than the oil temperature of the motor, the first valve is controlled so that the cooling liquid of the first closed loop flows through the first branch or the flow rate of the cooling liquid flowing through the first branch is greater than the flow rate of the cooling liquid flowing through the second branch.

[0201] In this case, when applied to the structure shown in FIG. 3B , that is, the first electromagnetic valve 4011 is controlled to be opened; when applied to the structure shown in FIG. 3C , that is, the first electromagnetic valve 4011 is controlled to be opened and the second electromagnetic valve 4013 is controlled to be closed.

[0202] Here, the temperature of the cooling liquid being greater than the oil temperature of the motor can be caused by the heat generated by the above-mentioned heat generating components (such as the range extender, the on-board charging device, etc.), which increases the temperature of the cooling liquid. Thus, in a case where the oil temperature of the motor is low but the temperature of the cooling liquid is higher than the oil temperature of the motor, the cooling liquid flows through the oil-water heat exchanger of the first branch entirely or mostly, and the cooling liquid can heat the oil flowing through the oil-water heat exchanger, which improves the oil temperature of the motor and reduces the oil stirring loss.

[0203] Referring to FIG. 11 , FIG. 11 is an internal fluid flow schematic diagram of the oil-water heat exchanger in the first type of heat management system provided by the embodiments of the present application. In FIG. 11In the figure, the oil-water heat exchanger includes a coolant flow channel and an oil flow channel. In the figure, the coolant flow channel is represented by light color and the oil flow channel is represented by dark color. See FIG. 11 (1) In the case where the oil temperature of the electric machine is less than the first threshold value, the oil flow channel of the oil-water heat exchanger has oil flowing therethrough, and the coolant flow channel of the oil-water heat exchanger can have no coolant flowing therethrough. See FIG. 11 (2) In the case where the oil temperature of the electric machine is less than the first threshold value and the temperature of the coolant is greater than the oil temperature of the electric machine, the oil flow channel of the oil-water heat exchanger has oil flowing therethrough, and the coolant flow channel of the oil-water heat exchanger has coolant flowing therethrough. Here, FIG. 11 This is only an example.

[0204] In some possible embodiments, the temperature detection information further includes a temperature of the heat-generating component. In the case where the oil temperature of the electric machine is less than the first threshold value, if the temperature of the heat-generating component is greater than a second threshold value, the control device can further perform the following control strategy: controlling the flow rate of the coolant output by the first water pump to the first closed loop circuit based on the temperature of the heat-generating component, wherein the second threshold value is greater than the first threshold value.

[0205] Here, the second threshold value can be set by the user based on experience or be a default setting of the system out of the factory. If the temperature of the heat-generating component is greater than the second threshold value, it means that the temperature of the heat-generating component is relatively high, and the heat-generating component has a cooling demand.

[0206] For example, when the heat-generating component includes multiple devices, such as the electric machine controller and the on-board charging device, the control device can control the flow rate of the coolant output by the first water pump based on the temperature of any one of the multiple devices, or can control the flow rate of the coolant output by the first water pump based on the highest temperature of the multiple devices.

[0207] Here, the higher the temperature of the heat-generating component, the greater the flow rate of the coolant output by the first water pump controlled by the control device, so that the more heat taken away by the coolant in the first closed loop circuit when flowing through the heat-generating component, thereby enhancing the cooling effect of the heat-generating component and achieving rapid cooling. In addition, even if the flow rate of the coolant in the first closed loop circuit is large, the oil-water heat exchange system can make the coolant in the first closed loop circuit flow through the oil-water heat exchanger as little as possible or not at all, so that the oil of the electric machine will not be cooled.

[0208] Further, the first closed loop circuit can further include a second valve and a second connecting head, the second valve, the heat-dissipating component and the second connecting head are connected in sequence to form a third branch, and the second valve and the second connecting head are connected in sequence to form a fourth branch parallel to the third branch, i.e. the thermal management system shown in FIG. 4 In this case, the above-mentioned control device is further connected with the second valve. When applied to the thermal management system shown in FIG. 4 Based on different implementation modes of the second valve, FIG. 4may be refined as the above FIG. 5A or FIG. 5B In FIG. 5B , the control device is connected with the second valve means that the control device is connected with the electromagnetic valve 2102, or the control device is connected with the electromagnetic valve 2102 and the electromagnetic valve 2103 respectively (in the case of the presence of the electromagnetic valve 2103).

[0209] When applied to the thermal management system shown in FIG. 4 , in the case that the temperature of the heat generating component is greater than the second threshold value, the control can also perform the following control strategy: control the second valve so that the flow rate of the cooling liquid flowing through the fourth branch is zero or the flow rate of the cooling liquid flowing through the third branch is greater than the flow rate of the cooling liquid flowing through the fourth branch.

[0210] As an example, the second valve is a three-way proportional valve and the second connecting head is a three-way valve, for example, see the above FIG. 5A . Before controlling the second valve, the control device first determines that the flow rate of the cooling liquid in the first closed loop is a second value, and according to the second value and the oil temperature of the motor, obtains a second proportional value of the flow rate of the cooling liquid flowing through the third branch. The above-mentioned control of the second valve includes: controlling the second valve based on the second proportional value. Here, the way to obtain the second proportional value can refer to the description of the way to obtain the first proportional value, which will not be repeated here. The second valve adopts a three-way proportional valve, which can control the flow rate proportion of the cooling liquid flowing through the third branch and the fourth branch respectively, improves the degree of refinement of control, and can more accurately adjust the oil temperature of the motor.

[0211] As another example, the second valve includes a third electromagnetic valve and a third three-way valve, and the second connecting head is a fourth three-way valve, and the third electromagnetic valve is used to control the conduction of the third branch, for example, see the above FIG. 5B . The above-mentioned control of the second valve includes: controlling the third electromagnetic valve to open. Combined with the above FIG. 5B , in the case that the temperature of the heat generating component is greater than the second threshold value, the control electromagnetic valve 2102 is opened. In this way, the cooling liquid in the first closed loop flows through the third branch, and the cooling liquid can be well cooled, which is convenient for cooling the heat generating component.

[0212] In some schemes, the second valve further includes a fourth electromagnetic valve, and the fourth electromagnetic valve is arranged on the fourth branch to control the conduction of the fourth branch, for example, see FIG. 5B . The above-mentioned control of the second valve can be: controlling the third electromagnetic valve to open and controlling the fourth electromagnetic valve to close. Combined with FIG. 5B , that is, controlling the electromagnetic valve 2102 to open and controlling the electromagnetic valve 2103 to close.

[0213] In some possible embodiments, the temperature detection information mentioned above also includes the temperature of the heating element. If the temperature of the motor oil is less than the first threshold, and the temperature of the heating element is less than the third threshold, the control device may also execute the following control strategy: control the first water pump to make the flow rate of the coolant in the first closed loop zero or to make the flow rate of the coolant in the first closed loop less than the flow rate threshold.

[0214] Here, the third threshold and traffic threshold can be user settings or factory default settings.

[0215] The third threshold can be the same as or different from the first threshold. If the temperature of the heating element is lower than the third threshold, it indicates that the temperature of the heating element is low or normal, and the heating element does not require cooling.

[0216] When applied FIG. 4 In the thermal management system shown, when the temperature of the heat-generating component is less than the third threshold, the control can also execute the following control strategy: control the second valve so that the flow rate of coolant flowing through the third branch is zero or the flow rate of coolant flowing through the fourth branch is greater than the flow rate of coolant flowing through the third branch. In this way, most of the coolant does not flow through the heat dissipation component, which helps to reduce the cooling effect on the heat-generating component.

[0217] In some possible embodiments, the thermal management system may further include a second closed-loop circuit. This second closed-loop circuit includes a second water pump, an engine waste heat exchanger, a fifth solenoid valve, and a coolant flow path for the oil-water heat exchanger. The second water pump is used to output coolant to the second closed-loop circuit, and the engine waste heat exchanger is used to collect waste heat generated by the engine. In other words, the thermal management system is... FIG. 6 The thermal management system shown. In this case, the aforementioned control device is also connected to a fifth solenoid valve. When the oil temperature in the motor is below a first threshold, the control device can also control the fifth solenoid valve to open. Combined with... FIG. 6 When the motor oil temperature is below the first threshold, the control solenoid valve 52 opens. In this way, the engine waste heat is used to heat the coolant flowing through the engine waste heat exchanger. When the heated coolant flows through the coolant channel of the oil-water heat exchanger, it can heat the oil flowing through the oil-water heat exchanger, thereby raising the temperature of the motor oil and improving the electric drive efficiency.

[0218] In some solutions, the temperature detection information also includes the temperature information of the heat-generating component. Based on the temperature detection information, the flow rate of the coolant flowing through the first branch is adjusted by controlling the first valve. This includes: when the motor oil temperature is higher than a fourth threshold, determining the maximum cooling demand between the motor oil temperature and the temperature of the heat-generating component, and controlling the first valve based on the maximum cooling demand to adjust the flow rate of the coolant flowing through the first branch.

[0219] Implementation FIG. 10In the embodiment, a bypass branch is established for the cooling liquid flow channel of the oil-water heat exchanger by setting the first valve and the first connecting head in the heat management system. The first valve can be controlled to adjust the flow of the cooling liquid flowing through the first branch based on the obtained temperature detection information. The oil-water heat exchanger is arranged in the first branch, so that the flow of the cooling liquid flowing through the oil-water heat exchanger can be adjusted. In this way, the flow of the cooling liquid flowing through the oil-water heat exchanger can be dynamically adjusted based on the oil temperature of the motor, so that the heat loss is not caused when the oil temperature of the motor is low, and the heat generated by the motor itself can gradually increase the oil temperature of the motor, thereby reducing the oil stirring loss and improving the electric drive efficiency and the cruising range of the vehicle.

[0220] For the second type of heat management system (for example FIG. 7 or FIGS. 8A-8C ), the embodiment of the present application provides another heat management control method, which is described below with reference to FIG. 12 . FIG. 12 The method shown in FIG. 1 The control device shown in can be used to control the heat management system of the vehicle, for example, the heat management system shown in any one of FIG. 7 and the like. Similarly, the control device can also be used to control the motor system described above.

[0221] The heat management system includes a first closed loop and a second closed loop. The first closed loop includes a motor, an oil pump, and an oil-water heat exchange system. The oil pump is used to output oil to the first closed loop. The second closed loop includes a first water pump and a cooling liquid flow channel of the oil-water heat exchanger. The first water pump is used to output cooling liquid to the second closed loop. The oil-water heat exchange system includes an oil flow channel of the oil-water heat exchanger, a first valve, and a first connecting head. The first valve, the oil flow channel of the oil-water heat exchanger, and the first connecting head are connected in sequence to form a first branch. The first valve and the first connecting head are connected in sequence to form a second branch parallel to the first branch. The oil-water heat exchanger is used to realize heat transfer between the oil flowing through the oil-water heat exchanger and the cooling liquid flowing through the oil-water heat exchanger, that is FIG. 7 the heat management system shown in

[0222] Here, the control device is connected to the oil pump and the first valve. Since the first valve has different implementation manners, FIG. 7 can be refined as the above FIG. 8A , FIG. 8B or FIG. 8C In FIG. 8B , the control device is connected to the first valve, which means that the control device is connected to the first electromagnetic valve 4011. In FIG. 8C , the control device is connected to the first valve, which means that the control device is connected to the first electromagnetic valve 4011 and the second electromagnetic valve 4013, respectively.

[0223] S1101: Obtain temperature detection information, the temperature detection information comprising an oil temperature of the motor. For details of this step, refer to FIG. 10 The description of the embodiment S1001 will not be repeated here for the sake of brevity of the description.

[0224] S1102: Adjust the flow rate of the oil flowing through the first branch according to the temperature detection information by controlling the first valve.

[0225] In an implementation, the adjusting of the flow rate of the oil flowing through the first branch according to the temperature detection information by controlling the first valve comprises: when the oil temperature of the motor is less than a first threshold, controlling the first valve so that the flow rate of the oil flowing through the first branch is zero or the flow rate of the oil flowing through the first branch is less than the flow rate of the oil flowing through the second branch. In this way, in the case where the oil temperature of the motor is low, the oil of the motor can not flow through or only a small part of the oil of the motor flows through the oil-water heat exchanger of the first branch, and only the oil flowing through the oil-water heat exchanger is taken away by the coolant flowing through the oil-water heat exchanger, so that the heat loss of the oil of the motor is less or no loss. In some schemes, the condition of this implementation further comprises that the temperature of the coolant is less than the oil temperature of the motor.

[0226] As an example, the first valve is a three-way proportional valve, and the first connecting head is a three-way valve, for example, refer to the above FIG. 8A Before controlling the first valve, the control device first determines that the flow rate of the oil in the current first closed loop is a target value, and obtains a target proportion value of the flow rate of the oil flowing through the first branch according to the target value and the oil temperature of the motor. The above-mentioned controlling of the first valve comprises: controlling the first valve based on the target proportion value. For example, the control device can obtain the flow rate of the oil in the current first closed loop according to the parameters of the oil pump, such as the rotation speed, the inlet pressure, the outlet pressure and the like of the oil pump. The three-way proportional valve is used for the first valve, which can control the flow rate proportion of the oil flowing through the first branch and the second branch respectively, thereby improving the degree of control refinement and more accurately adjusting the oil temperature of the motor.

[0227] In a possible implementation, the target proportion value of the flow rate of the coolant flowing through the first branch is obtained according to the target value and the oil temperature of the motor by looking up mapping information, wherein the mapping information comprises a corresponding relationship among the target value, the oil temperature of the motor and the target proportion value. In some schemes, the target proportion value can also be calculated according to the above-mentioned target value, the oil temperature of the motor and the ideal oil temperature of the motor. The ideal oil temperature of the motor refers to the temperature that the oil of the motor is expected to reach.

[0228] It can be understood that, in the case of the same target value, the lower the oil temperature of the motor, the smaller the target proportion value, and the higher the oil temperature of the motor, the larger the target proportion value.

[0229] In this way, by directly looking up the flow proportion corresponding to both the oil temperature of the motor and the total flow of the oil in the current first closed loop in the preset mapping information, the data processing efficiency is improved, and the temperature regulation rate is also improved.

[0230] As another example, the first valve includes a first electromagnetic valve and a first three-way valve, and the first connecting head is a second three-way valve, for example, see the above FIG. 8B The control of the first valve includes: controlling the first electromagnetic valve to be closed. FIG. 8B In the case where the oil temperature of the motor is less than the first threshold value, the first electromagnetic valve 4011 is controlled to be closed, so that the oil in the first closed loop flows through the second branch, and the flow of the oil flowing through the first branch is zero, that is, the oil does not flow through the oil-water heat exchanger, so the oil of the motor is not cooled, and the heat generated by the motor itself can gradually increase the oil temperature of the motor, greatly reducing the oil stirring loss and improving the electric drive efficiency.

[0231] Further, if the first valve further includes a second electromagnetic valve, the second electromagnetic valve is arranged on the second branch, for example, see the above FIG. 8C The control of the first valve includes: controlling the first electromagnetic valve to be closed and controlling the second electromagnetic valve to be opened. FIG. 8C In the case where the oil temperature of the motor is less than the first threshold value, the first electromagnetic valve 4011 is controlled to be closed and the second electromagnetic valve 4013 is controlled to be opened, so that the flow of the cooling liquid flowing through the first branch is zero, that is, the oil does not flow through the oil-water heat exchanger, so the oil of the motor is not cooled, and the heat generated by the motor itself can gradually increase the oil temperature of the motor, greatly reducing the oil stirring loss and improving the electric drive efficiency.

[0232] In another implementation manner, the second closed loop further includes a heat generating component, the temperature detection information further includes a temperature of the heat generating component, and the control device can further execute the following control strategy: when the temperature of the heat generating component is greater than a second threshold value, the flow of the cooling liquid output to the second closed loop by the first water pump is controlled based on the temperature of the heat generating component, where the second threshold value is greater than the first threshold value.

[0233] In some schemes, according to the temperature detection information, the flow of the oil flowing through the first branch is adjusted by controlling the first valve, and further includes: when the oil temperature of the motor is less than the first threshold value and the temperature of the cooling liquid is greater than the oil temperature of the motor, the first valve is controlled so that the oil of the first closed loop flows through the first branch or the flow of the oil flowing through the first branch is greater than the flow of the oil flowing through the second branch.

[0234] In this case, the structure shown in (1) is applied, that is, the first electromagnetic valve 4011 is controlled to be open; the structure shown in (2) is applied, that is, the first electromagnetic valve 4011 is controlled to be open and the second electromagnetic valve 4013 is controlled to be closed. FIG. 8B In this case, the structure shown in (1) is applied, that is, the first electromagnetic valve 4011 is controlled to be open; the structure shown in (2) is applied, that is, the first electromagnetic valve 4011 is controlled to be open and the second electromagnetic valve 4013 is controlled to be closed. FIG. 8C In this case, the structure shown in (1) is applied, that is, the first electromagnetic valve 4011 is controlled to be open; the structure shown in (2) is applied, that is, the first electromagnetic valve 4011 is controlled to be open and the second electromagnetic valve 4013 is controlled to be closed.

[0235] Here, the temperature of the cooling liquid being greater than the oil temperature of the motor can be caused by heat generated by the above-mentioned heat generating components (such as the range extender, the on-board charging device, etc.) and the temperature of the cooling liquid rising. In this way, in the scenario where the oil temperature of the motor is low and the temperature of the cooling liquid is higher than the oil temperature of the motor, the oil flows through the oil-water heat exchanger of the first branch in whole or in a large part, and thus the cooling liquid flowing through the oil-water heat exchanger can heat the oil flowing through the oil-water heat exchanger, the oil temperature of the motor is raised, and the oil stirring loss is reduced.

[0236] Referring to FIG. 13 , FIG. 13 is a schematic diagram of internal fluid flow of the oil-water heat exchanger in the second type of thermal management system provided by the embodiments of the present application. In FIG. 13 , the oil-water heat exchanger includes a cooling liquid flow channel and an oil flow channel, wherein the cooling liquid flow channel is indicated by light color and the oil flow channel is indicated by dark color. Referring to (1) of FIG. 13 , in the scenario where the oil temperature of the motor is less than the first threshold value, the oil flow channel of the oil-water heat exchanger can have no oil flowing therethrough, and the cooling liquid flow channel of the oil-water heat exchanger has cooling liquid flowing therethrough. Referring to (2) of FIG. 13 , in the scenario where the oil temperature of the motor is less than the first threshold value and the temperature of the cooling liquid is greater than the oil temperature of the motor, the oil flow channel of the oil-water heat exchanger has oil flowing therethrough, and the cooling liquid flow channel of the oil-water heat exchanger has cooling liquid flowing therethrough. Here, FIG. 13 is only an example.

[0237] The embodiments FIG. 12 , the thermal management system establishes a bypass branch for the oil flow channel of the oil-water heat exchanger by setting the first valve and the first connecting head, and the first valve can be controlled to adjust the flow of the oil flowing through the first branch based on the acquired temperature detection information, and the oil-water heat exchanger is in the first branch, that is, the flow of the oil flowing through the oil-water heat exchanger can be adjusted. In this way, the flow of the oil flowing through the oil-water heat exchanger can be dynamically adjusted based on the oil temperature of the motor, so that when the oil temperature of the motor is low, the heat is not lost, and the heat generated by the motor itself can gradually raise the oil temperature of the motor, the oil stirring loss is reduced, and the electric drive efficiency and the cruising range of the vehicle are improved.

[0238] Referring to FIG. 14 , FIG. 14This is a schematic diagram of a control device provided in an embodiment of this application. The control device 300 includes a communication unit 310 and a processing unit 312. The control device 300 can be implemented by hardware, software, or a combination of hardware and software.

[0239] In one implementation, the control device 300 is used to control the aforementioned first type of thermal management system (e.g., FIG. 2 , FIGS. 3A-3C , FIG. 4 , FIGS. 5A-5B or FIG. 6 The communication unit 310 is used to acquire temperature detection information, including the oil temperature of the motor; the processing unit 312 is used to adjust the flow rate of the coolant flowing through the first branch by controlling the first valve according to the temperature detection information.

[0240] In this case, the control device 300 can be used to achieve FIG. 10 The method described in the embodiments. FIG. 10 In this embodiment, the communication unit 310 can be used to execute S1001, and the processing unit 312 can be used to execute S1002.

[0241] In another implementation, the control device 300 is used to control the aforementioned second type of thermal management system (e.g., FIG. 7 or FIGS. 8A-8C The communication unit 310 is used to acquire temperature detection information, including the oil temperature of the motor; the processing unit 312 is used to adjust the flow rate of the oil flowing through the first branch by controlling the first valve based on the temperature detection information. In some embodiments, the control device can also be used to control the above-mentioned motor system (e.g., FIG. 9A or FIG. 9B ).

[0242] In this case, the control device 300 can be used to achieve FIG. 12 The method described in the embodiments. FIG. 12 In this embodiment, the communication unit 310 can be used to execute S1101, and the processing unit 312 can be used to execute S1102.

[0243] It should be understood that the division of units in the above control device 300 is only a logical division of functions, and in actual implementation, all or part of the units can be integrated into one physical entity, or can be physically separated. In addition, the units in the device can be implemented in the form of processor calling software; for example, the device includes a processor, the processor is connected with a memory, the memory stores instructions, and the processor calls the instructions stored in the memory to implement any of the above methods or to implement the functions of the units of the device, wherein the processor is, for example, a general processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory in the device or a memory outside the device. Alternatively, the units in the device can be implemented in the form of hardware circuit, and the functions of part or all of the units can be implemented by designing the hardware circuit, which can be understood as one or more processors; for example, in one implementation, the hardware circuit is an application-specific integrated circuit (ASIC), and by designing the logical relationship of elements in the circuit, the functions of part or all of the units are implemented; for example, in another implementation, the hardware circuit is a programmable logic device (PLD), and taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by a configuration file, so as to implement the functions of part or all of the units. All units of the above device can be implemented in the form of processor calling software, or all units can be implemented in the form of hardware circuit, or part of the units can be implemented in the form of processor calling software, and the remaining part can be implemented in the form of hardware circuit.

[0244] In the embodiments of the present application, the processor is a circuit with signal processing capability. In one implementation, the processor can be a circuit with instruction reading and running capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), a digital signal processor (DSP), etc. In another implementation, the processor can implement certain functions through a logical relationship of a hardware circuit, which is fixed or reconfigurable. For example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In the reconfigurable hardware circuit, the processor loads a configuration document to implement the hardware circuit configuration. It can be understood that the processor loads instructions to implement the functions of the above units. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0245] It can be seen that each unit in the above apparatus can be one or more processors (or processing circuits) configured to implement the above methods, for example: CPU, GPU, NPU, TPU, DPU, microprocessor, DSP, ASIC, FPGA, or a combination of at least two of these processor forms.

[0246] In addition, each unit in the above apparatus can be integrated together or can be independently implemented. In one implementation, the units are integrated together to implement a system-on-a-chip (SOC). The SOC can include at least one processor for implementing any of the above methods or the functions of the units of the apparatus. The at least one processor can be different, such as a CPU and an FPGA, a CPU and an artificial intelligence processor, a CPU and a GPU, etc.

[0247] Referring to FIG. 15 , FIG. 15 is a structural schematic diagram of a control device provided by an embodiment of the present application. As shown in FIG. 15As shown, the control device 400 includes a processor 411, a communication interface 412, a memory 413 and a bus 414. The processor 411, the memory 413 and the communication interface 412 communicate with each other through the bus 414. It should be understood that the number of processors and memories in the control device 400 is not limited in the present application.

[0248] In an implementation, the control device 400 is a thermal management controller of a vehicle or a component in the thermal management controller, such as a chip, an integrated circuit, etc. For example, the control device 400 includes the control apparatus 300 described above.

[0249] The bus 414 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the convenience of representation, FIG. 15 In the figure, only one line is used, but it does not mean that there is only one bus or one type of bus. The bus 414 can include a path for transmitting information between various components (e.g., the memory 413, the processor 411, the communication interface 412) of the control device 400.

[0250] The processor 411 can refer to the related description of the processor in the above embodiments, which will not be repeated here.

[0251] The memory 413 is used to provide a storage space in which data such as an operating system and a computer program can be stored. The memory 413 can be one or a combination of a random access memory (RAM), an erasable programmable read only memory (EPROM), a read-only memory (ROM), or a compact disc read memory (CD-ROM). The memory 413 can exist independently or be integrated into the processor 411.

[0252] The communication interface 412 can be used to provide information input or output for the processor 411. Alternatively, the communication interface 412 can be used to receive externally transmitted data and / or transmit data to the outside, which can be a wired link interface including an Ethernet cable, etc., or a wireless link (such as Wi-Fi, Bluetooth, general wireless transmission, etc.) interface. Alternatively, the communication interface 412 can also include a transmitter (such as a radio frequency transmitter, an antenna, etc.) or a receiver coupled with the interface, etc.

[0253] The processor 411 in the control device 400 is configured to read a computer program stored in the memory 413, and execute the foregoing method, for example FIG. 10 or FIG. 12 the method described above.

[0254] In a possible design, the control device 400 can be one or more modules in an execution subject (which is configured to control the first type of thermal management system described above) that executes the method shown in FIG. 10 The processor 411 can be configured to read one or more computer programs stored in the memory, and execute the following operations:

[0255] Obtain, by the communication unit 310, temperature detection information, where the temperature detection information includes an oil temperature of the motor.

[0256] According to the temperature detection information, adjust the flow of the cooling liquid flowing through the first branch by controlling the first valve.

[0257] In a possible design, the control device 400 can be one or more modules in an execution subject (which is configured to control the second type of thermal management system or the motor system described above) that executes the method shown in FIG. 12 The processor 411 can be configured to read one or more computer programs stored in the memory, and execute the following operations:

[0258] Obtain, by the communication unit 310, temperature detection information, where the temperature detection information includes an oil temperature of the motor.

[0259] According to the temperature detection information, adjust the flow of the oil flowing through the first branch by controlling the first valve.

[0260] In some embodiments, the vehicle further includes the first type of thermal management system (for example FIG. 2 , FIGS. 3A-3C , FIG. 4 , FIGS. 5A-5B or FIG. 6 ), or includes the second type of thermal management system (for example FIG. 7 or FIGS. 8A-8C ), or includes the motor system (for example FIG. 9A or FIG. 9B ).

[0261] In the above-mentioned embodiments, the description of each embodiment is focused on, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments. In addition, in each embodiment of the present application, the terms and / or descriptions of each embodiment are consistent and can be mutually referred to if there is no special description and logical conflict. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0262] It should be noted that all or part of the steps of various methods in the above-mentioned embodiments can be completed by programs instructing related hardware, and the programs can be stored in a computer readable storage medium, including read-only memory (ROM), random access memory (RAM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), one-time programmable read-only memory (OTPROM), electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, magnetic disk storage, magnetic tape storage, or any other medium capable of carrying or storing data which can be read by a computer.

[0263] The technical solutions of the present application or the essential part or the whole or part of the technical solutions that make contributions can be embodied in the form of a software product. The computer program product is stored in a storage medium and includes instructions for making a device (which can be a personal computer, a server, or a network device, a robot, a single-chip microcomputer, a chip, a robot, etc.) execute all or part of the steps of the method described in each embodiment of the present application.

Claims

1. A thermal management system of a vehicle, characterized by, The heat management system comprises a first closed loop circuit, the first closed loop circuit comprises a first water pump, a heat dissipation component, a heat generating component and an oil-water heat exchange system, the first water pump is used to output cooling liquid to the first closed loop circuit; The oil-water heat exchange system comprises a cooling liquid flow channel of an oil-water heat exchanger, a first valve and a first connecting head, the first valve, the cooling liquid flow channel of the oil-water heat exchanger and the first connecting head are sequentially connected to form a first branch, the first valve and the first connecting head are sequentially connected to form a second branch parallel to the first branch, the first valve is used to control the flow of the cooling liquid in the first closed loop circuit flowing through the first branch, and the oil-water heat exchanger is used to realize heat transfer between the cooling liquid flowing through the oil-water heat exchanger and the oil of the motor.

2. The system of claim 1, wherein, The first valve is a three-way proportional valve, and the first connecting head is a three-way valve, a first inlet of the first valve is used to receive the cooling liquid in the first closed loop circuit, a first outlet of the first valve is connected with a first valve port of the first connecting head through the cooling liquid flow channel of the oil-water heat exchanger to form the first branch, a second outlet of the first valve is connected with a second valve port of the first connecting head to form the second branch, and a third valve port of the first connecting head is used to output the cooling liquid from the first valve port and the second valve port of the first connecting head.

3. The system of claim 1, wherein, The first valve comprises a first electromagnetic valve and a first three-way valve, the first connecting head is a second three-way valve, a first valve port of the first three-way valve is used to receive the cooling liquid in the first closed loop circuit, a second valve port of the first three-way valve is sequentially connected with the first valve port of the first connecting head through the first electromagnetic valve and the cooling liquid flow channel of the oil-water heat exchanger to form the first branch, a third valve port of the first three-way valve is connected with a second valve port of the first connecting head to form the second branch, a third valve port of the first connecting head is used to output the cooling liquid from the first valve port and the second valve port of the first connecting head, and the first electromagnetic valve is used to control the conduction of the first branch.

4. The system according to any one of claims 1-3, characterized in that, The first closed loop circuit further comprises a second valve and a second connecting head, the second valve, the heat dissipation component and the second connecting head are sequentially connected to form a third branch, the second valve and the second connecting head are sequentially connected to form a fourth branch parallel to the third branch, and the second valve is used to control the flow of the cooling liquid in the first closed loop circuit flowing through the third branch.

5. The system of claim 4, wherein, The second valve is a three-way proportional valve, and the second connecting head is a three-way valve; a first inlet of the second valve is used to receive the cooling liquid in the first closed loop circuit, a first outlet of the second valve is connected with a first valve port of the second connecting head through the heat dissipation component to form the third branch, a second outlet of the second valve is sequentially connected with a second valve port of the second connecting head to form the fourth branch, and a third valve port of the second connecting head is used to output the cooling liquid from the first valve port and the second valve port of the second connecting head.

6. The system according to any one of claims 1-5, characterized in that, The heat management system further comprises a second closed loop circuit, the second closed loop circuit comprises a second water pump, an engine waste heat exchanger, a second electromagnetic valve and a coolant flow channel of the oil-water heat exchanger, the second water pump is used to output coolant to the second closed loop circuit, the engine waste heat exchanger is used to collect waste heat generated by the engine, and the second electromagnetic valve is used to control the conduction of the second closed loop circuit.

7. A thermal management system of a vehicle, characterized by, The heat management system comprises a first closed loop circuit and a second closed loop circuit, the first closed loop circuit comprises a motor, an oil pump and an oil-water heat exchange system, the oil pump is used to output oil to the first closed loop circuit; the second closed loop circuit comprises a water pump and a coolant flow channel of the oil-water heat exchanger, and the water pump is used to output coolant to the second closed loop circuit; The oil-water heat exchange system comprises an oil flow channel of the oil-water heat exchanger, a first valve and a first connecting head, the first valve, the oil flow channel of the oil-water heat exchanger and the first connecting head are sequentially connected to form a first branch, the first valve and the first connecting head are sequentially connected to form a second branch parallel to the first branch, the first valve is used to control the flow of oil in the first closed loop circuit flowing through the first branch, and the oil-water heat exchanger is used to realize heat transfer between the oil flowing through the oil-water heat exchanger and the coolant flowing through the oil-water heat exchanger.

8. The system of claim 7, wherein, The first valve is a three-way proportional valve, the first connecting head is a three-way valve, a first inlet of the first valve is used to receive oil in the first closed loop circuit, a first outlet of the first valve is connected with a first valve port of the first connecting head through the oil flow channel of the oil-water heat exchanger to form the first branch, a second outlet of the first valve is connected with a second valve port of the first connecting head to form the second branch, and a third valve port of the first connecting head outputs oil from the first valve port of the first connecting head and the second valve port of the first connecting head.

9. The system of claim 7, wherein, The first valve comprises a first electromagnetic valve and a first three-way valve, when the first connecting head is a second three-way valve, a first valve port of the first three-way valve is used to receive oil in the first closed loop circuit, a second valve port of the first three-way valve is sequentially connected with a first valve port of the first connecting head through the first electromagnetic valve and the oil flow channel of the oil-water heat exchanger to form the first branch, a third valve port of the first three-way valve is connected with a second valve port of the first connecting head to form the second branch, a third valve port of the first connecting head outputs oil from the first valve port of the first connecting head and the second valve port of the first connecting head, and the first electromagnetic valve is used to control the conduction of the first branch.

10. The system of claim 9, wherein, The first valve further comprises a second electromagnetic valve, the third valve port of the first three-way valve is connected with the second valve port of the first connecting head through the second electromagnetic valve to form the second branch, and the second electromagnetic valve is used to control the conduction of the second branch.

11. The system according to any of claims 7-10, characterized in that, The second closed loop circuit further comprises a heat dissipation component and a heat generation component, and the heat dissipation component is used to dissipate heat for the coolant in the second closed loop circuit.

12. An electric machine system characterized by The motor system comprises a first closed loop circuit, the first closed loop circuit comprising a motor, an oil pump, a first valve and a first connector; The first valve is connected to the oil pump, and the first valve is connected to the first connector.

13. The system of claim 12, wherein, The motor system comprises the oil-water heat exchanger, and the oil-water heat exchanger is configured to realize heat transfer between the oil flowing through the oil-water heat exchanger and the coolant flowing through the oil-water heat exchanger.

14. The system of claim 12 or 13, wherein The first valve is a three-way proportional valve, and the first connector is a three-way valve; or The first valve comprises a first electromagnetic valve and a first three-way valve, and the first connector is a second three-way valve.

15. The system of claim 14, wherein, When the first valve comprises a first electromagnetic valve and a first three-way valve, the inlet of the first valve is a first valve port of the first three-way valve, the first outlet of the first valve is an outlet of the first electromagnetic valve, a second valve port of the first three-way valve is connected to an inlet of the first electromagnetic valve, and the second outlet of the first valve is a third valve port of the first three-way valve.

16. A vehicle characterized by comprising: The vehicle comprises the thermal management system of any one of claims 1-11, or the motor system of any one of claims 12-15.

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