Thermal management system, motor system and thermal management control method

Abstract

The invention discloses a thermal management system, a motor system and a thermal management control method. 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; based on the obtained temperature detection information, the flow of the cooling liquid flowing through the oil-water heat exchanger can be adjusted by controlling the first valve. 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 a first connector to establish a bypass branch for the oil liquid flow channel of the oil-water heat exchanger, and the flow of the oil liquid flowing through the oil-water heat exchanger can be adjusted by controlling the first valve based on the obtained temperature detection information. 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] This application relates to the field of vehicle technology, and in particular to a thermal management system, an electric motor system, and a thermal management control method. Background Technology

[0002] Driving range is a crucial parameter in the development of electric vehicles. In current vehicle thermal management systems, the motor controller, motor, and on-board charging device (including on-board charger and DC-DC converter) are typically connected in series and share the same cooling circuit. A water pump drives the coolant in the cooling circuit to flow sequentially through the motor controller, motor (i.e., electric motor), and on-board charging device to remove heat and thus cool the components.

[0003] Since different components have different cooling requirements, the above-mentioned cooling operation may cause the motor oil temperature to be too low, the viscosity of the motor oil will increase, and the loss due to oil stirring will lead to a decrease in electric drive efficiency, which will also reduce the vehicle's range. Summary of the Invention

[0004] This application discloses a thermal management system, a motor system, and a thermal management control method, which can control the flow rate of coolant or oil flowing through an oil-water heat exchanger, so that no heat is lost when the oil temperature of the motor is low, which is beneficial to improving electric drive efficiency and vehicle range.

[0005] In a first aspect, this application provides a vehicle thermal management system, which includes a first closed-loop circuit. The first closed-loop circuit includes a first water pump, a cooling component, a heat-generating component, and an oil-water heat exchange system. The first water pump is used to output coolant to the first closed-loop circuit. The oil-water heat exchange system includes a coolant flow channel of an oil-water heat exchanger, a first valve, and a first connector. The first valve, the coolant flow channel of the oil-water heat exchanger, and the first connector are sequentially connected to form a first branch. The first valve and the first connector are sequentially connected to form a second branch in parallel with the first branch. The first valve is used to control the flow rate of coolant in the first closed-loop circuit through the first branch. The oil-water heat exchanger is used to realize the heat transfer between the coolant flowing through the oil-water heat exchanger and the oil in the motor.

[0006] For example, the first valve is a three-way proportional valve and the first connector is a three-way valve; or, the first valve includes a first solenoid valve and a first three-way valve and the first connector is a second three-way valve.

[0007] In the above scheme, in the first closed-loop circuit containing the water pump, heating components, and oil-water heat exchanger, a first valve is installed at the inlet of the oil-water heat exchanger and a first connector is installed at the outlet of the oil-water heat exchanger. The connection between the first valve and the first connector establishes a bypass branch (i.e., a second branch) for the coolant flow path of the oil-water heat exchanger. The first valve allows for independent control of the coolant flow rate through the oil-water heat exchanger, decoupling the coolant flow control between the oil-water heat exchanger and the heating components. Thus, when the motor oil temperature is low, the coolant in the first closed-loop circuit can flow through the oil-water heat exchanger less or not at all, preventing a drop in the motor oil temperature and not affecting the cooling of other components (such as the heating components) in the first closed-loop circuit. Furthermore, the motor's self-generated heat allows the motor oil temperature to gradually rise, significantly reducing oil churning losses and improving electric drive efficiency and vehicle range.

[0008] In one possible implementation of the first aspect, when 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 used to receive coolant in the first closed loop, the first outlet of the first valve is connected to the first valve port of the first connector via the coolant flow channel of the oil-water heat exchanger to form a first branch, the second outlet of the first valve is connected to the second valve port of the first connector to form a second branch, and the third valve port of the first connector is used to collect and output the coolant from the first valve port and the second valve port of the first connector.

[0009] In this implementation, the first valve is a three-way proportional valve, which can proportionally control the flow rate of coolant flowing through the first branch and the second branch in the first closed-loop circuit. It can be understood that if the total coolant flow rate in the first closed-loop circuit remains constant, and the flow rate of coolant flowing through the first branch decreases, the flow rate of coolant flowing through the second branch will increase.

[0010] In one possible implementation of the first aspect, the first valve includes a first solenoid valve and a first three-way valve. When the first connector is a second three-way valve, the first valve port of the first three-way valve is used to receive coolant in the first closed-loop circuit. The second valve port of the first three-way valve is connected to the first valve port of the first connector in sequence via the first solenoid valve and the coolant flow channel of the oil-water heat exchanger to form a first branch. The third valve port of the first three-way valve is connected to the second valve port of the first connector to form a second branch. The third valve port of the first connector is used to collect and output the coolant from the first valve port and the second valve port of the first connector. Here, the first solenoid valve is used to control the conduction of the first branch.

[0011] In this implementation, when the first solenoid valve is closed, the first branch is not open, and the flow rate of coolant through the first branch is zero, meaning that the coolant in the first closed-loop circuit does not flow through the oil-water heat exchanger. When the first solenoid valve is open, the first branch is open, and the first branch and the second branch divide the total coolant flow of the first closed-loop circuit. This achieves the adjustment of the coolant flow rate through the first branch.

[0012] Furthermore, the first valve also includes a second solenoid valve. The third valve port of the first three-way valve is connected to the second valve port of the first connector through the second solenoid valve to form the second branch. The second solenoid valve is used to control the conduction of the second branch.

[0013] In this implementation, when the first solenoid valve is open and the second solenoid valve is closed, the coolant in the first closed-loop circuit flows entirely through the first branch, and the coolant flow through the second branch is zero. When the first solenoid valve is closed and the second solenoid valve is open, the coolant in the first closed-loop circuit flows entirely through the second branch, and the coolant flow through the first branch is zero. When both the first and second solenoid valves are open, the coolant in the first closed-loop circuit flows through both the first and second branches. This achieves adjustment of the coolant flow through the first branch, which is beneficial for improving electric drive efficiency when applied to scenarios where the motor oil temperature is low.

[0014] In one possible implementation of the first aspect, the first closed-loop circuit further includes a second valve and a second connector, wherein the second valve, the heat dissipation component and the second connector are sequentially connected to form a third branch, and the second valve and the second connector are sequentially connected to form a fourth branch in parallel with the third branch, and the second valve is used to control the flow rate of coolant flowing through the third branch in the first closed-loop circuit.

[0015] In this implementation, the second valve controls the flow rate of coolant flowing through the heat dissipation components in the first closed-loop circuit. The higher the flow rate of coolant through the heat dissipation components, the more heat is carried away by the coolant, the lower the coolant temperature, and the better the subsequent cooling effect. By controlling the first valve, the cooling requirements of the motor's oil can be met; while by controlling the second valve, the cooling requirements of the heat-generating components can be met.

[0016] In one possible implementation of the first aspect, when the second valve is a three-way proportional valve and the second connector is a three-way valve, the first inlet of the second valve is used to receive coolant in the first closed loop, the first outlet of the second valve is connected to the first valve port of the second connector via a heat dissipation component to form a third branch, the second outlet of the second valve is sequentially connected to the second valve port of the second connector to form a fourth branch, and the third valve port of the second connector is used to collect and output coolant from the first valve port and the second valve port of the second connector.

[0017] In this implementation, the second valve can proportionally control the flow rate of coolant flowing through the third and fourth branches in the first closed-loop circuit, improving the precision of control. If the total coolant flow rate in the first closed-loop circuit remains constant, but the flow rate of coolant flowing through the third branch increases, the flow rate of coolant flowing through the fourth branch will decrease.

[0018] In one implementation, the second valve includes a third solenoid valve and a third three-way valve. When the second connector is a fourth three-way valve, the first port of the third three-way valve is used to receive coolant in the first closed-loop circuit. The second port of the third three-way valve is connected to the first port of the second connector in sequence via the third solenoid valve and the heat dissipation component to form a third branch. The third port of the third three-way valve and the second port of the second connector are connected in sequence to form a fourth branch. The third port of the second connector is used to collect and output the coolant from the first port and the second port of the second connector. Here, the third solenoid valve is used to control the conduction of the third branch.

[0019] In this implementation, when the third solenoid valve is closed, the third branch is not open, and the flow rate of coolant through the third branch is zero, meaning the coolant does not flow through the oil-water heat exchanger. When the third solenoid valve is open, the third branch is open, and the third and fourth branches split the total coolant flow of the first closed-loop circuit. This allows for adjustment of the coolant flow rate through the third branch, specifically supporting adjustments based on the cooling requirements of the heat-generating components.

[0020] In some designs, the second valve also includes a fourth solenoid valve, which is located on the fourth branch. The third valve port of the third three-way valve is connected to the second valve port of the second connector in sequence through the fourth solenoid valve to form the fourth branch. The fourth solenoid valve is used to control the conduction of the fourth branch.

[0021] In this implementation, when the third solenoid valve is open and the second and fourth solenoid valves are closed, the coolant in the first closed-loop circuit flows entirely through the third branch, and the coolant flow through the fourth branch is zero. When the third solenoid valve is closed and the fourth solenoid valve is open, the coolant in the first closed-loop circuit flows entirely through the fourth branch, and the coolant flow through the third branch is zero. When both the third and fourth solenoid valves are open, the coolant in the first closed-loop circuit flows through both the third and fourth branches. This achieves adjustment of the coolant flow through the third branch, specifically supporting adjustments based on the cooling requirements of the heat-generating components.

[0022] In one possible implementation of the first aspect, the thermal management system further includes a second closed-loop circuit, which includes a second water pump, an engine waste heat exchanger, a fifth solenoid valve, and a coolant flow path for an 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 fifth solenoid valve is used to control the conduction of the second closed-loop circuit.

[0023] In this implementation, when the oil temperature of the motor is low, the fifth solenoid valve opens, and the second closed loop is activated. The waste heat of the engine can also be used to heat the coolant flowing through the oil-water heat exchanger. The temperature of the heated coolant is higher than the temperature of the oil flowing through the oil-water heat exchanger. Heat is transferred between the coolant and the oil, thereby increasing the temperature of the motor oil, reducing oil churning losses, and improving electric drive efficiency.

[0024] Secondly, this application provides a vehicle thermal management system, which 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 oil pump is used to output oil to the first closed-loop circuit. The second closed-loop circuit includes a water pump and a coolant flow channel of an oil-water heat exchanger. The water pump is used to output coolant to the second closed-loop circuit. The oil-water heat exchange system includes an oil flow channel of an 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 sequentially connected to form a first branch. The first valve and the first connector are sequentially connected to form a second branch in parallel with the first branch. The first valve is used to control the flow rate of oil in the first closed-loop circuit through the first branch. The oil-water heat exchanger is used to realize the 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; or, the first valve includes a first solenoid 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 containing the oil-water heat exchanger, oil pump, and motor, a first valve is installed at the inlet of the oil-water heat exchanger, and a first connector is installed at the outlet of the oil-water heat exchanger. The connection between the first valve and the first connector establishes a bypass branch (i.e., a second branch) for the oil flow path of the oil-water heat exchanger, and the first valve can independently control the flow rate of the oil passing through the oil-water heat exchanger. For example, when the motor oil temperature is low, the oil in the first closed-loop circuit may not flow through the oil-water heat exchanger or flows only slightly through it, and the motor oil temperature will not be lowered by the coolant flowing through the oil-water heat exchanger. Simultaneously, as the motor operates, its self-heating can also raise the temperature of the motor oil, which is beneficial for improving electric drive efficiency and the vehicle's low-temperature range.

[0027] In one 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 used to receive the oil in the first closed loop. The first outlet of the first valve is connected to the first valve port of the first connector through the oil flow channel of the oil-water heat exchanger to form a first branch. The second outlet of the first valve is connected to the second valve port of the first connector to form a second branch. The third valve port of the first connector collects and outputs the oil from the first valve port and the second valve port of the first connector.

[0028] In this implementation, the first valve can proportionally control the flow rate of the oil flowing through the first branch and the second branch in the first closed loop, which improves the precision of oil flow control and helps to improve the accuracy of temperature regulation.

[0029] In one possible implementation of the second aspect, the first valve includes a first solenoid valve and a first three-way valve. When the first connector is a second three-way valve, the first valve port of the first three-way valve is used to receive oil in the first closed loop. The second valve port of the first three-way valve is connected to the first valve port of the first connector in sequence through the first solenoid valve and the oil flow channel of the oil-water heat exchanger to form a first branch. The third valve port of the first three-way valve is connected to the second valve port of the first connector to form a second branch. The third valve port of the first connector collects and outputs the oil from the first valve port and the second valve port of the first connector. The first solenoid valve is used to control the conduction of the first branch.

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

[0031] Furthermore, the first valve also includes a second solenoid valve. The third valve port of the first three-way valve is connected to the second valve port of the first connector through the second solenoid valve to form a second branch. The second solenoid valve is used to control the conduction of the second branch.

[0032] In this implementation, when the first solenoid valve is open and the second solenoid valve is closed, the oil in the first closed-loop circuit flows entirely through the first branch, and the oil flow through the second branch is zero. When the first solenoid valve is closed and the second solenoid valve is open, the oil in the first closed-loop circuit flows entirely through the second branch, and the oil flow through the first branch is zero. When both the first and second solenoid valves are open, the oil in the first closed-loop circuit flows through both the first and second branches. This achieves adjustment of the oil flow through the first branch, which is beneficial for improving electric drive efficiency when applied to scenarios where the motor oil temperature is low.

[0033] Optionally, the second closed-loop circuit also includes a heat dissipation component and a heat-generating component, wherein the heat dissipation component is used to dissipate heat from the coolant in the second closed-loop circuit.

[0034] In this implementation, the coolant in the second closed-loop circuit can also dissipate heat for the heat-generating components, taking into account the cooling requirements of the heat-generating components. The setup of the first and second closed-loop circuits decouples the heat dissipation control of the heat-generating components from that of the oil-water heat exchanger.

[0035] Thirdly, this application provides a motor system, which includes a first closed-loop circuit, comprising a motor, an oil pump, a first valve, and a first connector; wherein, the inlet of the first valve is used to receive oil output from the oil pump, the first outlet of the first valve and the first inlet of the first connector are respectively used to connect the two ends of the oil flow channel of the oil-water heat exchanger, the second outlet of the first valve is connected to the second inlet of the first connector, the outlet of the first connector is used to collect and output the oil from the first inlet and the second inlet of the first connector, and the first valve is used to adjust the flow rate of the oil flowing through the oil-water heat exchanger.

[0036] In the above scheme, by setting a first valve and a first connector in the closed loop circuit where the motor and oil pump are located, the connection between the first valve and the first connector can establish a bypass branch for the circulation of oil. The first valve makes it possible to independently control the flow rate of oil flowing through the oil-water heat exchanger, which is suitable for different cooling requirements of the motor oil. When the motor oil temperature is low, the motor system can improve the electric drive efficiency and the vehicle's low-temperature range.

[0037] In one possible implementation of the third aspect, the motor system includes an oil-water heat exchanger for heat transfer between the oil flowing through the heat exchanger and the coolant flowing through the heat exchanger.

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

[0039] In one possible implementation 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 includes a first solenoid valve and a first three-way valve, and the first connector is a second three-way valve.

[0040] As can be seen, multiple implementation methods of the first valve are provided. Using a three-way proportional valve as the first valve can improve the precision of the first valve's control over the oil flow rate. Using a solenoid valve as the first valve can also achieve adjustment of the oil flow rate through the oil-water heat exchanger.

[0041] In one possible implementation of the third aspect, when the first valve includes a first solenoid valve and a first three-way valve, the inlet of the first valve is the first valve port of the first three-way valve, the first outlet of the first valve is the outlet of the first solenoid valve, the second valve port of the first three-way valve is connected to the inlet of the first solenoid valve, and the second outlet of the first valve is the third valve port of the first three-way valve.

[0042] Fourthly, this application provides a thermal management control method for controlling a vehicle's thermal management system. The thermal management system includes a first closed-loop circuit, comprising a first water pump, a cooling component, an oil-water heat exchange system, and a heating component. The first water pump outputs coolant to the first closed-loop circuit. The oil-water heat exchange system includes a first valve, a first connector, and a coolant flow channel for the oil-water heat exchanger. The first valve, the coolant flow channel of the oil-water heat exchanger, and the first connector are sequentially connected to form a first branch. The first valve and the first connector are sequentially connected to form a second branch in parallel with the first branch. The oil-water heat exchanger is used to transfer heat between the coolant flowing through the oil-water heat exchanger and the motor oil. The method includes: acquiring temperature detection information, including the motor oil temperature; and adjusting the 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 scheme, the thermal management system establishes a bypass branch for the coolant flow path of the oil-water heat exchanger by setting a first valve and a first connector. Based on the acquired temperature detection information, the first valve can be controlled to adjust the flow rate of coolant flowing through the first branch. Since the first branch contains an oil-water heat exchanger, the flow rate of coolant flowing through the heat exchanger can be adjusted. This allows for dynamic adjustment of the coolant flow rate through the oil-water heat exchanger based on the motor's oil temperature. This prevents heat loss when the motor's oil temperature is low, and the motor's own heat generation helps the motor's oil temperature gradually rise, reducing oil churning losses and improving electric drive efficiency and vehicle range.

[0044] In one possible implementation of the fourth aspect, the flow rate of the coolant flowing through the first branch is adjusted by controlling the first valve based on temperature detection information, including: when the oil temperature of the motor is less than a first threshold, controlling the first valve so that the flow rate of the coolant flowing through the first branch is zero or the flow rate of the coolant flowing through the first branch is less than the flow rate of the coolant flowing through the second branch.

[0045] In this implementation, when the motor oil temperature is low, the coolant does not flow through or flows only a small portion through the first branch, so that the oil flowing through the oil-water heat exchanger is not taken away by the coolant or is taken away by the coolant with as little heat as possible. The motor generates its own heat so that the motor oil temperature gradually rises, realizing the self-heating of the motor oil temperature, reducing oil churning losses, and helping to improve electric drive efficiency.

[0046] In one 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 used to receive coolant in the first closed-loop circuit. The first outlet of the first valve is connected to the first valve port of the first connector via the coolant flow channel of the oil-water heat exchanger to form a first branch. The second outlet of the first valve is connected to the second valve port of the first connector to form a second branch. The third valve port of the first connector is used to collect and output the coolant from the first valve port and the second valve port of the first connector. Before controlling the first valve, the method further includes: determining the current flow rate of coolant in the first closed-loop circuit as a first value; obtaining the flow rate ratio of coolant flowing through the first branch as a first proportional value based on the first value and the oil temperature of the motor; controlling the first valve includes: 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 of coolant flowing through the first branch, thereby improving the precision of coolant flow control and enabling better temperature regulation.

[0048] In one possible implementation of the fourth aspect, the first valve includes a first solenoid valve and a first three-way valve, and the first connector is a second three-way valve. The first port of the first three-way valve is used to receive coolant in the first closed-loop circuit. The second port of the first three-way valve is connected to the first port of the first connector in sequence through the first solenoid valve and the coolant flow channel of the oil-water heat exchanger to form a first branch. The third port of the first three-way valve is connected to the second port of the first connector to form a second branch. The third port of the first connector is used to collect and output the coolant from the first port and the second port of the first connector. Controlling the first valve includes: controlling the first solenoid valve to close.

[0049] In this implementation, when the first solenoid valve is closed, the first branch is not open, so the flow rate of coolant through the first branch is zero. This is applicable to scenarios where the motor oil temperature is low. Since the flow rate of coolant through the first branch is zero, the oil flowing through the oil-water heat exchanger will not have its heat carried away by the coolant. Instead, the heat generated by the motor itself heats the motor oil, causing the motor oil temperature to gradually rise. This greatly reduces oil churning losses and helps improve electric drive efficiency and vehicle range.

[0050] In one possible implementation of the fourth aspect, the temperature detection information also includes the temperature of the coolant. Based on the temperature detection information, the flow rate of the coolant flowing through the first branch is adjusted by controlling the first valve, including: when the oil temperature of the motor is less than a first threshold and the temperature of the coolant is greater than the oil temperature of the motor, controlling the first valve so that the coolant output by the water pump flows through the first branch, or making the flow rate of the coolant flowing through the first branch greater than the flow rate of the coolant flowing through the second branch.

[0051] Thus, in scenarios where the motor oil temperature is low but the coolant temperature is higher than the motor oil temperature, all or most of the coolant flows through the oil-water heat exchanger of the first branch. This coolant can heat the oil flowing through the oil-water heat exchanger, thereby increasing the motor oil temperature and reducing oil churning losses.

[0052] In one possible implementation of the fourth aspect, the temperature detection information also includes the temperature of the heating component, and the method further includes: if the temperature of the heating component is greater than a second threshold, then controlling the flow rate of the coolant output by the first water pump to the first closed loop based on the temperature of the heating component, wherein the second threshold is greater than the first threshold.

[0053] In this embodiment, when the motor oil temperature is low but the temperature of the heat-generating components is high, the flow rate of the coolant output by the first water pump can be adjusted according to the cooling requirements of the heat-generating components. For example, the greater the flow rate of the coolant output by the first water pump, the more heat the coolant can remove. This prevents the heat-generating components from overheating.

[0054] In one possible implementation of the fourth aspect, the temperature detection information also includes the temperature of the heating component, and the method further includes: if the temperature of the heating component is less than a third threshold, controlling 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.

[0055] In this embodiment, when the oil temperature of the motor is low and the temperature of the heat-generating components is low, the first water pump can be controlled to reduce or even eliminate the total flow rate of the coolant in the first closed-loop circuit. As a result, the coolant carries away less heat, thus saving energy consumption while meeting the cooling requirements of each component.

[0056] In one possible implementation of the fourth aspect, the first closed-loop circuit 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. The method further includes: when the oil temperature of the motor is less than a first threshold, if the temperature of the heat-generating component is greater than a second threshold, controlling the second valve so that the flow rate of the coolant flowing through the fourth branch is zero or the flow rate of the coolant flowing through the third branch is greater than the flow rate of the coolant flowing through the fourth branch.

[0057] In this embodiment, when the motor oil temperature is low but the temperature of the heat-generating components is high, all or most of the coolant flows through the third branch, which contains a heat dissipation component; that is, all or most of the coolant flows through this heat dissipation component. The greater the flow rate of coolant through the heat dissipation component, the more heat is carried away by the coolant, the lower the coolant temperature, and the better the cooling effect when the coolant subsequently flows through the heat-generating components, thus preventing the heat-generating components from overheating.

[0058] In one possible implementation of the fourth aspect, the second valve is a three-way proportional valve and the second connector is a three-way valve. The first inlet of the second valve is used to receive coolant in the first closed-loop circuit. The first outlet of the second valve is connected to the first valve port of the second connector via a heat dissipation component to form a third branch. The second outlet of the second valve is sequentially connected to the second valve port of the second connector to form a fourth branch. The third valve port of the second connector collects and outputs the coolant from both the first valve port and the second valve port of the second connector. Before controlling the second valve, the method further includes: determining the current flow rate of coolant in the first closed-loop circuit as a second value; obtaining the flow rate ratio of coolant flowing through the third branch as a second proportional value based on the second value and the temperature of the heat-generating component; controlling the second valve includes: controlling the second valve based on the second proportional value.

[0059] In this implementation, the second valve is a three-way proportional valve, which can distribute the flow rate of coolant flowing through the third branch, thereby improving the precision of coolant flow control and enabling better temperature regulation.

[0060] Optionally, the second valve includes a second solenoid valve and a third three-way valve, and the second connector is a fourth three-way valve. The first port of the third three-way valve is used to receive coolant in the first closed-loop circuit. The second port of the third three-way valve is connected to the first port of the second connector in sequence via the second solenoid valve and the heat dissipation component to form a third branch. The third port of the third three-way valve is connected to the second port of the second connector to form a fourth branch. The third port of the second connector collects and outputs the coolant from the first port of the second connector and the second port of the second connector. Controlling the second valve includes: controlling the second solenoid valve to open.

[0061] In this implementation, when the second solenoid valve is opened, the third branch is activated. The total amount of coolant flowing through the first closed loop is divided between the third and fourth branches, so the flow rate of coolant flowing through the first branch is zero. This is applicable to scenarios where the oil temperature of the motor is low. Due to the total flow rate of coolant flowing through the first branch, the coolant flowing through the third branch carries away heat, which can better cool the heat-generating components.

[0062] In one possible implementation of the fourth aspect, the thermal management system further includes a second closed-loop circuit, which includes a second water pump, an engine waste heat exchanger, a third solenoid valve, and a coolant flow path for an 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. The method further includes: controlling the third solenoid valve to open when the oil temperature of the motor is lower than a first threshold.

[0063] In this implementation, when the motor oil temperature is low, the third solenoid valve is opened to utilize the engine's waste heat to heat the oil flowing through the oil-water heat exchanger. This increases the motor oil temperature, reduces oil churning losses, and improves electric drive efficiency.

[0064] Fifthly, this application provides a thermal management control method for controlling the 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 coolant flow channel of an oil-water heat exchanger. 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 sequentially connected to form a first branch. The first valve and the first connector are sequentially connected to form a second branch in parallel with the first branch. The first valve controls the flow rate of the oil output from the oil pump in the first closed-loop circuit through 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 coolant flowing through the oil-water heat exchanger. The method includes: acquiring 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 based on the temperature detection information.

[0065] In the above scheme, the thermal management system establishes a bypass branch for the oil flow channel of the oil-water heat exchanger by setting a first valve and a first connector. Based on the acquired temperature detection information, the first valve can be controlled to adjust the flow rate of the oil flowing through the first branch. Since the first branch contains an oil-water heat exchanger, the flow rate of the oil flowing through the heat exchanger can be adjusted. This allows for dynamic adjustment of the oil flow rate through the oil-water heat exchanger based on the motor's oil temperature. This prevents heat loss when the motor's oil temperature is low, and the motor's own heat generation helps the motor's oil temperature gradually rise, reducing oil churning losses and improving electric drive efficiency and vehicle range.

[0066] In one possible implementation of the fifth aspect, the flow rate of the oil flowing through the first branch is adjusted by controlling the first valve based on temperature detection information, including: 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.

[0067] In this implementation, when the motor oil temperature is low, the oil may not flow through or only partially flow through the first branch. That is, the motor oil does not flow through or only partially flows through the oil-water heat exchanger. The oil that only flows through the oil-water heat exchanger will have its heat carried away by the coolant flowing through the oil-water heat exchanger. Therefore, the heat loss of the motor oil is small or non-existent. At the same time, the motor's own heat generation causes the motor oil temperature to gradually rise, achieving self-heating of the motor oil temperature, reducing oil churning losses, and improving electric drive efficiency.

[0068] In one possible implementation of the fifth 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 used to receive oil in the first closed loop. The first outlet of the first valve is connected to the first valve port of the first connector via the oil flow channel of the oil-water heat exchanger to form a first branch. The second outlet of the first valve is connected to the second valve port of the first connector to form a second branch. The third valve port of the first connector is used to collect and output the oil from the first valve port and the second valve port of the first connector. Before controlling the first valve, the method further includes: determining the current flow rate of the oil in the first closed loop as a target value; obtaining the flow rate ratio of the oil flowing through the first branch as a target ratio value based on the target value and the oil temperature of the motor; controlling the first valve includes: controlling the first valve based on the target ratio value.

[0069] In this implementation, the first valve is a three-way proportional valve, which can distribute the flow rate of the oil flowing through the first branch, thereby improving the precision of oil flow control and enabling better temperature regulation.

[0070] In one possible implementation of the fifth aspect, the first valve includes a first solenoid valve and a first three-way valve, and the first connector is a second three-way valve. The first valve port of the first three-way valve is used to receive oil in the first closed-loop circuit. The second valve port of the first three-way valve is connected to the first valve port of the first connector in sequence through the first solenoid valve and the oil flow channel of the oil-water heat exchanger to form a first branch. The third valve port of the first three-way valve is connected to the second valve port of the first connector to form a second branch. The third valve port of the first connector is used to collect and output the oil from the first valve port and the second valve port of the first connector. Controlling the first valve includes: controlling the first solenoid valve to close.

[0071] In this implementation, when the first solenoid valve is closed, the first branch is not open, so the flow rate of the oil flowing through the first branch is zero. When applied to scenarios where the oil temperature of the motor is low, it means that the flow rate of the oil flowing through the oil-water heat exchanger is zero. Therefore, the motor oil will not have its heat carried away by the coolant, but the heat generated by the motor itself heats the motor oil, causing the motor oil temperature to gradually rise. This greatly reduces the oil churning loss and is beneficial to improving electric drive efficiency and vehicle range.

[0072] In one possible implementation of the fifth aspect, the temperature detection information also includes the temperature of the coolant at the inlet of the coolant flow channel of the oil-water heat exchanger. Based on the temperature detection information, the flow rate 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 a first threshold and the temperature of the coolant is greater than the oil temperature of the motor, controlling the first valve to make the oil output by the oil pump flow through the first branch, or to make the flow rate of the oil flowing through the first branch greater than the flow rate of the oil flowing through the second branch.

[0073] Thus, in scenarios where the motor oil temperature is low but the coolant temperature is higher than the motor oil temperature, all or most of the oil flows through the oil-water heat exchanger of the first branch. The coolant flowing through the oil-water heat exchanger can heat the oil flowing through it, thereby increasing the motor oil temperature and reducing oil churning losses.

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

[0075] In this implementation, when the motor oil temperature is low but the temperature of the heat-generating components is high, the flow rate of the coolant output by the water pump can be adjusted according to the cooling requirements of the heat-generating components. For example, the greater the flow rate of the coolant output by the water pump, the more heat the coolant can remove. This prevents the heat-generating components from overheating.

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

[0077] In this implementation, when the oil temperature of the motor is low and the temperature of the heat-generating components is low, the water pump can be controlled to reduce or even eliminate the total flow rate of the coolant in the second closed-loop circuit. As a result, the coolant carries away less heat, thus saving energy consumption while meeting the cooling requirements of each component.

[0078] In a sixth aspect, this application provides an apparatus for thermal management control, the apparatus including a communication unit and a processing unit, the apparatus being used to implement the method in the fourth aspect or any possible manner of the fourth aspect.

[0079] In a seventh aspect, this application provides an apparatus for thermal management control, the apparatus comprising: a communication unit and a processing unit, the apparatus being used to implement the method in the fifth aspect or any possible manner of the fifth aspect.

[0080] Eighthly, this application provides a chip including a processor and a memory, wherein the memory is used to store program instructions; the processor invokes the program instructions in the memory to cause the chip to execute the method in the fourth aspect or any possible implementation of the fourth aspect, or to execute the method in the fifth aspect or any possible implementation of the fifth aspect.

[0081] Ninthly, this application provides a control system, which includes a control device and a target system. The control device is used 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 may be a 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 may be a thermal management system in the second aspect or any possible implementation of the second aspect, or a motor system in the third aspect or any possible implementation of the third aspect.

[0082] In a tenth aspect, this application provides a vehicle that includes a thermal management system as described in the first aspect or a possible implementation thereof, or includes a thermal management system as described in the second aspect or a possible implementation thereof, or includes a motor system as described in the second aspect or a possible implementation thereof, or includes the device as described in the sixth aspect, or includes the device as described in the seventh aspect, or includes the chip as described in the eighth aspect, or includes the control system as described in the ninth aspect.

[0083] In one aspect, this application provides a computer-readable storage medium including computer instructions that, when 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.

[0084] In a twelfth aspect, this application provides a computer program product that, when executed by a processor, implements the method described in the fourth aspect or any possible embodiment of the fourth aspect, or implements the method in the fifth aspect or any possible implementation of the fifth aspect.

[0085] For example, the computer program product may include a software product (e.g., a software installation package) or a hardware product (e.g., a computer-readable storage medium). Attached Figure Description

[0086] Figure 1 This is a schematic diagram of the architecture of a control system provided in an embodiment of this application;

[0087] Figure 2 This is a schematic diagram of a thermal management system provided in an embodiment of this application;

[0088] Figures 3A-3C These are schematic diagrams of the structures of some thermal management systems provided in the embodiments of this application;

[0089] Figure 4 This is a schematic diagram of yet another thermal management system provided in an embodiment of this application;

[0090] Figures 5A-5B These are schematic diagrams of the structures of some thermal management systems provided in the embodiments of this application;

[0091] Figure 6 This is a schematic diagram of yet another thermal management system provided in an embodiment of this application;

[0092] Figure 7 This is a schematic diagram of yet another thermal management system provided in an embodiment of this application;

[0093] Figures 8A-8CThese are schematic diagrams of the structures of some thermal management systems provided in the embodiments of this application;

[0094] Figure 9A This is a schematic diagram of a motor system provided in an embodiment of this application;

[0095] Figure 9B This is a schematic diagram of the structure of a motor system provided in an embodiment of this application;

[0096] Figure 10 This is a flowchart of a thermal management control method provided in an embodiment of this application;

[0097] Figure 11 This is a schematic diagram of the internal fluid flow in an oil-water heat exchanger in a first type of thermal management system provided in this application embodiment;

[0098] Figure 12 This is a flowchart of another thermal management control method provided in the embodiments of this application;

[0099] Figure 13 This is a schematic diagram of the internal fluid flow in an oil-water heat exchanger in a second type of thermal management system provided in this application embodiment;

[0100] Figure 14 This is a schematic diagram of the structure of a control device provided in an embodiment of this application;

[0101] Figure 15 This is a schematic diagram of the structure of a control device provided in an embodiment of this application. Detailed Implementation

[0102] This scheme uses prefixes such as "first" and "second" solely to distinguish different descriptive objects, without imposing any restrictions on the position, order, priority, quantity, or content of the described objects. For example, if the described object is a "three-way valve," the ordinal numbers before "three-way valve" in "first three-way valve" and "second three-way valve" are simply to distinguish that they are two different three-way valves. Similarly, if the described object is a "level," the ordinal numbers before "level" in "first level" and "second level" do not restrict the priority between "levels." Furthermore, the quantity of described objects is not limited by prefixes; there can be one or more. For example, in "first equipment," the quantity of "equipment" can be one or more. Moreover, different prefixes can modify the same or different objects. For instance, if the described object is "equipment," "first equipment" and "second equipment" can be the same equipment, the same type of equipment, or different types of equipment; similarly, if the described object is "information," "first information" and "second information" can be information with the same content or information with different content. In summary, the use of prefixes to distinguish the described objects in the embodiments of this application does not constitute a limitation on the described objects. The description of the described objects is given in the context of the claims or embodiments, and the use of such prefixes should not constitute an unnecessary limitation.

[0103] Currently, the motor, motor controller, and DC-DC converter form a closed-loop circuit in series. Different components have different cooling requirements. The water pump controls the coolant flow rate based on the highest cooling demand of each component. The coolant is used to cool the components in the closed-loop circuit. However, when the motor oil temperature is low, strong cooling can lead to excessively low oil temperature and increased oil viscosity, resulting in reduced electric drive efficiency and hindering vehicle range. To address these issues, this solution provides a control system that adjusts the flow rate of coolant or oil through an oil-water heat exchanger based on the motor oil temperature. The oil-water heat exchanger facilitates heat transfer between the coolant and the motor oil. This system prevents heat loss from the motor oil when its temperature is low, while also maintaining the cooling of other components in the closed-loop circuit. This improves electric drive efficiency and the vehicle's low-temperature range.

[0104] The components of the control system will be introduced below. (See also...) Figure 1 , Figure 1 This is a schematic diagram of the architecture of a control system provided in an embodiment of this application. The control system includes 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 communicate with each other via wired and / or wireless means.

[0105] The control unit and thermal management system are both located within the vehicle. This solution applies to vehicles, which are modes of transportation driven by electric motors. Here, the vehicle is a new energy vehicle, which can be, for example, an electric vehicle (EV), a hybrid electric vehicle (HEV), a range-extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), a fuel cell vehicle, or other new energy vehicles.

[0106] For example, the control device may be the vehicle's thermal management controller or a component within the thermal management controller, such as a chip or integrated circuit. In this solution, the control device can be connected to the water pump and various valves in the thermal management system to control the water pump and valves. The thermal management system is described in the following embodiments, and will not be repeated here.

[0107] Figure 1 The control system shown can be applied to a variety of application scenarios, such as mobile internet (MI), self-driving, transportation safety, and smart city.

[0108] Figure 1 The control system shown can be applied to various network types, such as one or more of the following: SparkLink, Long Term Evolution (LTE) networks, 5th generation mobile communication technology (5G), wireless local area networks (e.g., Wi-Fi), Bluetooth (BT), Zigbee, or vehicle-mounted short-range wireless communication networks, etc.

[0109] here, Figure 1 This is merely an illustrative architecture diagram and is not intended to limit the scope of the invention. Figure 1 The system shown includes the number of network elements. Although Figure 1 Not shown, but except Figure 1 In addition to the functional entities shown, Figure 1 It may also include other functional entities. Furthermore, the method provided in the embodiments of this application can be applied to… Figure 1 The control system shown is applicable to control systems in other thermal management scenarios with cooling (heat dissipation) requirements, as can the method provided in the embodiments of this application.

[0110] As a crucial component of vehicles, thermal management systems regulate the temperature of vehicle components such as oil-water heat exchangers, motor controllers, and on-board charging devices. This solution provides several thermal management systems, primarily categorized into two types: those that control the flow rate of coolant through oil-water heat exchangers, and those that control the flow rate of oil through oil-water heat exchangers. These two types of thermal management systems are described below with examples.

[0111] Type I thermal management system: Supports control of the coolant flow rate through the oil-water heat exchanger. Please refer to the following for details on Type I thermal management systems. Figure 2 , Figures 3A-3C , Figure 4 , Figures 5A-5B or Figure 6 The relevant description.

[0112] See Figure 2 , Figure 2 This is a schematic diagram of a thermal management system provided in an embodiment of this application. Figure 2 In this thermal management system, a first closed-loop circuit is included, which includes a first water pump 10, a heat dissipation component 20, a heat generation 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 circuit and to drive the flow of coolant in the first closed-loop circuit. The first water pump 10 can control the flow rate of coolant in the first closed-loop circuit (or the total flow rate of coolant in the first closed-loop circuit). By adjusting parameters such as the rotational speed, inlet pressure, and outlet pressure of the first water pump 10, the total flow rate of coolant in the first closed-loop circuit can be increased or decreased.

[0114] For example, the coolant can be a fluid such as water or ethylene glycol solution.

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

[0116] The aforementioned heat-generating component 30 includes a motor controller and / or an on-board charging device. For example, when the on-board charging device is obtained by integrating an on-board charger (OBC) and a DC-DC converter, the on-board charging device can also be called 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 called a three-in-one module.

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

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

[0119] The oil-water heat exchanger 402 is used to transfer heat between the coolant flowing through it and the oil in the motor. In some embodiments, the oil-water heat exchanger may also be called an oil-cooled radiator 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, denoted as d. 21 The second interface is the output interface, denoted as d. 22 .

[0120] The first connector 403 is used to control the flow direction of the coolant. Here, the first connector 403 is a three-way valve with three ports: a first port, a second port, and a third port. The first and second ports are inlets, and the third port is an outlet. Figure 2 The first valve port is denoted as d. 31 The second valve port is represented as d. 32 The third valve port is represented 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 method of the oil-water heat exchange system 40 can be referred to below. Figure 3A As shown. In Figure 3A In the middle, the first inlet of the first valve 401 (i.e., the aforementioned d) 10 ) is used to receive coolant in the first closed-loop circuit, and the first outlet of the first valve 401 (i.e., the aforementioned d) 11 The coolant flows through the oil-water heat exchanger 402 and connects to the first valve port of the first connector 403 (i.e., the aforementioned d). 31 The connection forms the first branch mentioned above, and the second outlet of the first valve 401 (i.e., the aforementioned d) 12 ) and the second valve port of the first connector 403 (i.e., the aforementioned d) 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 coolant output from both is combined and output.

[0122] exist Figure 3A In the first branch, the first outlet of the first valve 401 (i.e., d) 11 The first interface between the oil-water heat exchanger 402 and the coolant flow channel (i.e., the aforementioned d) 21 The 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.

[0123] exist Figure 3A In this circuit, the first valve 401 can proportionally control the flow rate of coolant flowing through the first branch and the second branch in the first closed-loop circuit. It can be understood that the sum of the flow rate of coolant flowing through the first branch and the flow rate of coolant flowing through the second branch is the total coolant flow rate of the first closed-loop circuit. If the total coolant flow rate of the first closed-loop circuit remains constant, and the flow rate of coolant flowing through the first branch decreases, the flow rate of coolant flowing through the second branch will increase. Specifically, if the flow rate of coolant flowing through the first branch is zero, then the flow rate of coolant flowing through the second branch is the total coolant flow rate of the first closed-loop circuit. Here, a zero flow rate of coolant flowing through the first branch indicates 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 method of the oil-water heat exchange system 40 can be found below. Figure 3B As shown. In Figure 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 Among them, the first solenoid valve 4011 is used to control the conduction of the first branch.

[0125] For example, in Figure 3B In the middle, the first valve port of the first three-way valve 4012 (i.e., d) 13 The second valve port (i.e., d) of the first three-way valve 4012 is used to receive coolant in the first closed-loop circuit. 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... Figure 2 , Figure 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 ), Figure 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 ), Figure 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 Figure 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 Figure 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, Figure 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]. Figure 3C .exist Figure 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 Figure 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] Here, the above Figure 2 , Figure 3A , Figure 3B as well as Figure 3C This is merely an example of a thermal management system. Figure 2 For example, Figure 2 This is merely an example of a first closed-loop circuit formed by the first water pump 10, heat dissipation component 20, heat generation component 30, and oil-water heat exchange system 40 connected in series. It does not limit the positions of the first water pump 10, heat dissipation component 20, heat generation component 30, and oil-water heat exchange system 40 within the first closed-loop circuit. Figure 2 As shown. In some schemes, the oil-water heat exchange system 40 and the first water pump 10 can be interchanged, or the oil-water heat exchange system 40 can be interchanged with the heating element 30, or the heating element 30 can be interchanged with the heat dissipation element 20, etc.

[0131] In some solutions, when there are multiple heat-generating components, such as the aforementioned motor controller and on-board charging device, the oil-water heat exchange 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 exchange system 40. That is to say, when there are multiple heat-generating components, these multiple heat-generating components can be connected in series together in the first closed-loop circuit, or they can be set separately.

[0132] It is understandable that the above Figures 3A-3C All Figure 2 Some examples.

[0133] In the above scheme, in the first closed-loop circuit containing the water pump, heating components, and oil-water heat exchanger, a first valve is installed at the inlet of the oil-water heat exchanger and a first connector is installed at the outlet of the oil-water heat exchanger. The connection between the first valve and the first connector establishes a bypass branch (i.e., a second branch) for the coolant flow path of the oil-water heat exchanger. Furthermore, the first valve allows for independent control of the coolant flow rate through the oil-water heat exchanger, achieving decoupling of coolant flow control between the oil-water heat exchanger and the heating components. Thus, when the motor oil temperature is low, the coolant in the first closed-loop circuit can flow through the oil-water heat exchanger less or not at all, preventing a drop in the motor oil temperature and maintaining the cooling of other components (such as the heating components) in the first closed-loop circuit. Additionally, the motor's self-heating during operation can also raise the temperature of the motor oil, which is beneficial for improving electric drive efficiency and the vehicle's low-temperature range.

[0134] In some possible embodiments, combined Figure 2 The thermal management system shown can also provide Figure 2 A bypass branch is established in the heat dissipation component 20 to achieve flow control of the coolant flowing through the heat dissipation component 20. See, for example. Figure 4As shown, the first closed-loop circuit also includes 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. The second valve 21 and the second connector 22 are sequentially connected to form a fourth branch in parallel with the third branch. That is, the coolant flow direction in the third branch is: second valve 21 → heat dissipation component 20 → second connector 22; the coolant flow direction in the fourth branch is: second valve 21 → second connector 22. Figure 4 The oil-water heat exchange system 40 can specifically be Figures 3A-3C The connection methods shown in the corresponding parts of either one will not be elaborated here.

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

[0136] Here, the heat dissipation component 20 is used to dissipate heat from 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 the input interface and the second interface (denoted as d) 202 The interface 20 is the outlet. In some designs, when the heat dissipation component is an evaporator, the interface of the heat dissipation component 20 includes not only the inlet of the evaporator's coolant flow channel (denoted as d) but also... 201 ) and the outlet of the evaporator's coolant flow channel (denoted as d) 202 It also includes the inlet of the refrigerant channel of the evaporator and the outlet of the refrigerant 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 with three ports: a first port, a second port, and a third port. The first and second ports are inlets, and the third port is an outlet. Figure 4 The first valve port is denoted as d. 221 The second valve port is represented as d. 222 The third valve port is represented as d. 223 .

[0138] In one implementation, the second valve 21 is a three-way proportional valve 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]. Figure 5A As shown. In Figure 5A In the middle, 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 Figure 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, Figure 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]. Figure 5B As shown. In Figure 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 Figure 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... Figure 4 , Figure 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 ), Figure 4 The first outlet (d) of the second valve 21 211 ) is the outlet of solenoid valve 2102 (i.e., d) 217 ), Figure 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, Figure 5BIn the second valve 21, a solenoid valve 2103 is also included. The solenoid valve 2103 is located on the fourth branch and is used to control the conduction of the fourth branch. The solenoid valve 2103 has one inlet (denoted as d). 218 ) and an outlet (denoted as d) 219 The third valve port (i.e., d) of the aforementioned three-way valve 2101. 215 ) sequentially connects to the second valve port (i.e., d) of the second connector 22. 222 The connection forming the fourth branch refers to the third valve port (i.e., d) of the three-way valve 2101. 215 ) through solenoid valve 2103 and the second valve port (i.e. d) of the second connector 22 222 The connection forms the fourth branch, in which the third valve port (i.e., d) of the three-way valve 2101 215 ) and the inlet of solenoid valve 2103 (i.e., d 218 ) connection, solenoid valve 2103 outlet (i.e. d 219 ) and the second valve port (i.e. d) of the second connector 22 222 ) connection. In this case, compare Figure 4 , Figure 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 ), Figure 4 The first outlet (d) of the second valve 21 211 ) is the outlet of solenoid valve 2102 (i.e., d) 217 ), Figure 4 The second outlet (d) of the second valve 21 212 ) is the outlet of solenoid valve 2103 (i.e., d) 219 ).

[0146] It is understandable that the above Figures 5A-5B All Figure 4 Some examples.

[0147] In some schemes, Figure 4 Alternatively, the first valve 401 and the first connector 403 may not be provided. That is, one end of the coolant flow channel of the oil-water heat exchanger 402 is connected to the first water pump 10, and the other end of the coolant flow channel of the oil-water heat exchanger 402 is connected to the heating element 30.

[0148] Figure 2 The structure shown can meet the cooling requirements of an oil-water heat exchanger. Figure 2 Based on Figure 4 The structure shown adds a bypass branch to the heat dissipation component in the first closed loop, which can flexibly control the flow rate of coolant through the heat dissipation component according to the temperature of other heat-generating components in the first closed loop, thus also meeting the cooling requirements of the heat-generating component.

[0149] In some possible embodiments, when applied to hybrid vehicles, combined with Figure 2 The thermal management system shown is exemplarily described in [reference]. Figure 6 As shown. In this way, when the oil temperature of the motor is low, the waste heat of the engine can be used to heat the oil-water heat exchanger, thereby heating the oil in the motor.

[0150] exist Figure 6 The aforementioned thermal management system also includes a second closed-loop circuit, which includes a second water pump 12, an engine waste heat exchanger 50, a solenoid valve 52, and a coolant flow channel for an oil-water heat exchanger 402.

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

[0152] For example, in Figure 6 In the second closed-loop circuit, the coolant flow direction is: second water pump 12 → engine waste heat exchanger 50 → solenoid valve 52 → oil-water heat exchanger 402 → second water pump 12. The coolant flow channel of the oil-water heat exchanger 402 in the second closed-loop circuit is the same as the coolant flow channel of the oil-water heat exchanger 402 in the first closed-loop circuit. Therefore, the interface of the coolant flow channel of the oil-water heat exchanger 402 includes the first interface (i.e., the aforementioned d). 21 ) and the second interface (i.e., the above d) 22 In addition to ), it also includes a third interface (represented as d). 23 ) and the fourth interface (represented as d) 24 The oil-water heat exchanger 402 has four ports, with the third port serving as the inlet and the fourth port as the outlet. This means the coolant flow path of the oil-water heat exchanger 402 has four ports, implying that each end of the coolant flow path integrates a three-way valve (or these two three-way valves can be set independently). 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 solenoid valve 52, and the other end of the solenoid valve 52 is connected to the third port (i.e., d) of the oil-water heat exchanger 402. 23 ) connection, the fourth port (i.e., d) of the oil-water heat exchanger 402 24 It is connected to the inlet of the second water pump 12.

[0153] In some schemes, Figure 6 In this configuration, the engine waste heat exchanger 50 can also be replaced with the engine itself. Additionally, Figure 6 The oil-water heat exchange system 40 can specifically adopt Figures 3A-3C The connection methods shown in the corresponding parts of either one are not elaborated here. This is understandable. Figure 6 As a matter of course Figure 2 This is an example of using engine waste heat to heat an oil-water heat exchanger, based on the thermal management system shown.

[0154] In some possible embodiments, Figure 6 The second closed-loop circuit shown can also be connected with... Figure 4 , Figure 5A or Figure 5B The thermal management system shown can be combined in a similar way to the one described above. Figure 6 The descriptions of the relevant content will not be repeated here.

[0155] Type II thermal management system: Supports control of the oil flow rate through the oil-water heat exchanger. Please refer to the following for details on Type II thermal management systems. Figure 7 or Figures 8A-8C The relevant description.

[0156] See Figure 7 , Figure 7 This is a schematic diagram of yet another thermal management system provided in an embodiment of this application. Figure 7 In this thermal management system, a first closed-loop circuit and a second closed-loop circuit are included. The first closed-loop circuit includes a motor 60, an oil pump 62, and an oil-water heat exchange system 40. The second closed-loop circuit includes a coolant flow channel for an oil-water heat exchanger 402 and a first water pump 10. In some embodiments, in... Figure 7 In the second closed-loop circuit, a heat dissipation component 20 and a heat generation component 30 are also included. Please refer to [link to details about heat dissipation component 20 and heat generation component 30]. Figure 2 The descriptions of the relevant content in the embodiments will not be repeated here.

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

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

[0159] exist Figure 7 In the oil-water heat exchange system 40, a first valve 401, an oil flow channel of an oil-water heat exchanger 402, and a first connector 403 are sequentially connected to form a first branch. The first valve 401, the oil flow channel of the oil-water heat exchanger 402, and the first connector 403 are sequentially connected to form a second branch connected in parallel with the first branch. Figure 7 In the first branch, the oil flow direction is: first valve 401 → oil-water heat exchanger 402 → first connector 403; in the second branch, the oil flow direction is: first valve 401 → first connector 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 respectively the first interface (denoted as d). 21 ) and the second interface (represented as d) 22 ).

[0161] exist Figure 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 Figure 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 Figure 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]. Figure 8A As shown. In Figure 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 first connector 403 is connected to form a second branch, and the third valve port (i.e., the aforementioned d) is connected to form a second branch. 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] exist Figure 8A In the first branch, the first outlet of the first valve 401 (i.e., d) 11 The first interface (i.e., d) of the oil flow channel of the oil-water heat exchanger 402. 25 The second interface (i.e., d) of the oil flow channel of the oil-water heat exchanger 402 is connected. 26 ) and the first valve port (i.e. d) of the first connector 403 31 )connect.

[0165] exist Figure 8A In this circuit, the first valve 401 can proportionally control the flow rate of oil flowing through the first branch and the second branch in the first closed-loop circuit. It can be understood that the sum of the flow rate of oil flowing through the first branch and the flow rate of oil flowing through the second branch is the flow rate output by the oil pump 62 to the first closed-loop circuit (or the total oil flow rate of the first closed-loop circuit). If the total oil flow rate of the first closed-loop circuit remains constant, and the flow rate of oil flowing through the first branch decreases, the flow rate of oil flowing through the second branch will increase. Specifically, if the flow rate of oil flowing through the first branch is zero, then the flow rate of oil flowing through the second branch is the total oil flow rate of the first closed-loop circuit. Here, a zero flow rate of oil flowing through the first branch indicates that the oil does not pass through the oil-water heat exchanger 402.

[0166] 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 method of the oil-water heat exchange system 40, please refer to [link to relevant documentation]. Figure 8B As shown. In Figure 8B 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 Among them, the first solenoid valve 4011 is used to control the conduction of the first branch.

[0167] exist Figure 8B In the middle, the first valve port of the first three-way valve 4012 (i.e., d) 13 The second valve port (i.e., d) of the first three-way valve 4012 is used to receive oil from the first closed-loop circuit. 14 The oil flows sequentially through the first solenoid valve 4011, the oil-water heat exchanger 402, and the first valve port (i.e., d) of the first connector 403. 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 40332 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... Figure 7 , Figure 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 ), Figure 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 ), Figure 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 Figure 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, Figure 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]. Figure 8C .exist Figure 8C In the middle, the second solenoid valve 4013 has one inlet (i.e., d) 18 ) and an outlet (i.e., d) 19 ).exist Figure 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 )connect.

[0170] exist Figure 8C In the first closed-loop circuit, when the first solenoid valve 4011 is open and the second solenoid valve 4013 is closed, the oil 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 oil 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 oil in the first closed-loop circuit flows through both the first branch and the second branch.

[0171] It is understandable that the above Figures 8A-8C All Figure 7 Some examples.

[0172] In the above scheme, in the first closed-loop circuit containing the oil pump, motor, and oil-water heat exchanger's oil flow channels, a first valve is installed at the inlet of the oil-water heat exchanger, and a first connector is installed at the outlet of the oil-water heat exchanger. The connection between the first valve and the first connector establishes a bypass branch (i.e., a second branch) for the oil flow channels of the oil-water heat exchanger, and the first valve allows for independent control of the oil flow rate through the oil-water heat exchanger. For example, when the motor's oil temperature is low, the oil in the first closed-loop circuit may not flow through the oil-water heat exchanger or flows only slightly through it, preventing the motor's oil temperature from being lowered by the coolant flowing through the heat exchanger. Simultaneously, the motor's self-heating during operation can also raise the temperature of the motor's oil, which is beneficial for improving electric drive efficiency and the vehicle's low-temperature range.

[0173] In addition, this application also provides a motor system, as exemplarily described in the embodiments. Figure 9A . Figure 9A This is a schematic diagram of a motor system provided in an embodiment of this application. Figure 9A The motor system includes a first closed-loop circuit, which includes a motor 60, an oil pump 62, a first valve 401, and a first connector 403.

[0174] The first valve 401 has one inlet (i.e., d) 10 ) and two exits, namely the first exit (i.e., d) 11 ) and the second exit (i.e., d 12 The first connector 403 has three valve ports, namely d 31 d 32 and d 33 .exist Figure 9A In the middle, d 31 and d 32 If both are used as entry points, then d 31 This can be referred to as the first entry point of the first connector 403, d 32 The second inlet is referred to as the first connector 403; d33 As an export, then d 33 This can be referred to as the outlet of the first connector 403.

[0175] exist Figure 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 Figure 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 two ends of the oil flow channel of the oil-water heat exchanger 402 are respectively used to connect the two ends of the oil flow channel of the first valve 401 (i.e., d). 11 The first interface (i.e., d) used to connect 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, Figure 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]. Figure 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]. Figure 9B .exist Figure 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 Figure 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]. Figure 8B The connection methods between the corresponding devices are not described in detail here. (See also:) Figure 9A , Figure 9A The inlet of the first valve 401 (i.e., d) 10 )for Figure 9B The first valve port (i.e., d) of the first three-way valve 4012 13 ), Figure 9A The first outlet of the first valve 401 (i.e., d) 11 )for Figure 9B The outlet of the first solenoid valve 4011 (i.e., d) 17 ), Figure 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, Figure 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... Figure 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]. Figure 8C The details of the connection methods between the corresponding components will not be repeated here. Thus, Figure 9A The second outlet of the first valve 401 (i.e., d) 12 )for Figure 9B The outlet of the second solenoid valve 4013 (i.e., d) 19 ).

[0180] In some embodiments, the aforementioned motor system also includes an oil-water heat exchanger 402. In this case, the first valve 401, the oil flow channel of the oil-water heat exchanger 402, and the first connector 403 are sequentially connected to form a first branch. The first valve 401 and the first connector 403 are sequentially connected to form a second branch connected in parallel with the first branch. For the specific connection methods between the components on the first and second branches, please refer to the above description. Figure 7 The relevant content will not be repeated here.

[0181] It is understandable that the above Figure 9B for Figure 9A One example.

[0182] In the aforementioned motor system, by setting a first valve and a first connector in the closed-loop circuit containing the motor and oil pump, the connection between the first valve and the first connector can establish a bypass branch for the circulation of oil. The first valve makes it possible to independently control the flow rate of oil flowing through the oil-water heat exchanger, which is suitable for different cooling requirements of the motor oil. When the motor oil temperature is low, the motor system can improve electric drive efficiency and the vehicle's low-temperature range.

[0183] The thermal management control method provided in the embodiments of this application is described below in conjunction with the above structure.

[0184] For the aforementioned first type of thermal management system (e.g.) Figure 2 , Figures 3A-3C , Figure 4 , Figures 5A-5B or Figure 6 This application provides a thermal management control method, see [link to relevant documentation]. Figure 10 . Figure 10 The method shown can be applied to Figure 1 The control device shown can be used to control the above-mentioned Figure 2 , Figure 4 , Figure 6 The thermal management system shown in any of the above.

[0185] The thermal management system includes a first closed-loop circuit, which includes 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 coolant to the first closed-loop circuit. The oil-water heat exchange system includes a first valve, a first connector, and a coolant flow channel of the oil-water heat exchanger. The first valve, the coolant flow channel of the oil-water heat exchanger, and the first connector are sequentially connected to form a first branch. The first valve and the first connector are sequentially connected to form a second branch in parallel with the first branch. The oil-water heat exchanger is used to realize the heat transfer between the coolant flowing through the oil-water heat exchanger and the oil in the motor.

[0186] Here, the control device is connected to the first water pump, the first valve, and the heating element. Figure 2 Taking the thermal management system shown as an example, based on the different implementation methods of the first valve, Figure 2 It can be further refined into the above. Figure 3A , Figure 3B or Figure 3C .exist Figure 3B In this context, "the control device is connected to the first valve" means that the control device is connected to the first solenoid valve 4011. Figure 3C In this context, "the control device is connected to the first valve" means that the control device is connected to the first solenoid valve 4011 and the second solenoid valve 4013 respectively.

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

[0188] In one implementation, 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 this temperature sensor. Here, the temperature sensor may be located inside the motor or at the oil outlet of the motor.

[0189] In some embodiments, 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 coolant flow channel of the oil-water heat exchanger (hereinafter referred to as the temperature of the coolant). This allows the temperature of the heat-generating component and the temperature of the coolant to be obtained, and the temperature detection information further includes the temperature of the heat-generating component and the temperature of the coolant.

[0190] S1002: Based on temperature detection information, adjust the flow rate of coolant flowing through the first branch by controlling the first valve.

[0191] In one implementation, the flow rate of coolant flowing through the first branch is adjusted by controlling a first valve based on temperature detection information. This includes: when the motor oil temperature is lower than a first threshold, controlling the first valve to make the flow rate of coolant flowing through the first branch zero or lower than the flow rate of coolant flowing through the second branch. Thus, in scenarios where the motor oil temperature is low, coolant does not flow through or only partially flows through the oil-water heat exchanger of the first branch, so that the oil flowing through the heat exchanger does not lose heat to the coolant or loses as little heat as possible. In some embodiments, this implementation also includes the condition that the coolant temperature is lower than the motor oil temperature.

[0192] Here, the first threshold is a setting based on experience or the factory default setting. If the motor's oil temperature is lower than the first threshold, it indicates that the motor's oil temperature is low or normal, meaning that the motor's oil currently does not require cooling, but may require insulation or even heating.

[0193] As an example, the first valve is a three-way proportional valve, and the first connector is a three-way valve, as shown above. Figure 3A As shown. Before controlling the first valve, the control device first determines the coolant flow rate in the current first closed-loop circuit as a first value, and obtains the flow rate ratio of the coolant flowing through the first branch as a first proportional value based on the first value and the motor oil temperature. Therefore, controlling the first valve includes: controlling the first valve based on the first proportional value. The first valve is a three-way proportional valve, which can separately control the flow rate ratio of the coolant flowing through the first branch and the second branch, improving the precision of control and enabling more accurate temperature regulation.

[0194] For example, the control device may perform the following operations to obtain the current flow rate of coolant in the first closed loop: obtain the parameters of the first water pump, including the current speed of the first water pump, the inlet pressure of the first water pump, and the outlet pressure of the first water pump; calculate the current flow rate of coolant in the first closed loop as a first value based on the parameters of the first water pump.

[0195] In one possible implementation, obtaining the flow rate ratio of the coolant flowing through the first branch as a first proportion value based on a first value and the motor's oil temperature includes: looking up first mapping information based on the first value and the motor's oil temperature to obtain the flow rate ratio of the coolant flowing through the first branch as the first proportion value. The first mapping information includes the correspondence between the first value, the motor's oil temperature, and the first proportion value. In some solutions, the first proportion value can also be calculated based on the aforementioned first value, the motor's oil temperature, and the motor's ideal oil temperature. The ideal oil temperature of the motor refers to the temperature that the motor's oil is expected to reach.

[0196] It is understandable that, given the same first value, the lower the oil temperature of the motor, the smaller the first proportional value, and the higher the oil temperature of the motor, the larger the first proportional value.

[0197] Thus, by directly looking up the ratio of the motor's oil temperature and the total coolant flow rate of the current first closed loop in the preset first mapping information, data processing efficiency is improved, and it is also beneficial to improve the temperature regulation rate.

[0198] As another example, the first valve includes a first solenoid valve and a first three-way valve, and the first connector is a second three-way valve, as shown above. Figure 3B As shown. Therefore, controlling the first valve includes: controlling the first solenoid valve to close. In conjunction with the above... Figure 3BWhen the motor oil temperature is lower than the first threshold, the first solenoid valve 4011 is closed, so that the coolant in the first closed loop flows through the second branch, and the flow rate of the coolant flowing through the first branch is zero, that is, the flow rate of the coolant flowing through the oil-water heat exchanger is zero. Therefore, the motor oil will not be cooled when it flows through the oil-water heat exchanger, and the heat generated by the motor itself can also make the motor oil temperature gradually rise, which greatly reduces the oil stirring loss and is conducive to improving the electric drive efficiency.

[0199] Furthermore, if the first valve also includes a second solenoid valve, the second solenoid valve is located on the second branch, for example, see the above. Figure 3C As shown. Therefore, controlling the first valve includes: controlling the first solenoid valve to close and controlling the second solenoid valve to open. Combined with... Figure 3C When the motor oil temperature is lower than the first threshold, controlling the first solenoid valve 4011 to close and the second solenoid valve 4013 to open can achieve zero flow of coolant through the first branch, that is, the coolant does not flow through the oil-water heat exchanger. Therefore, the motor oil will not be cooled when it flows through the oil-water heat exchanger, and the heat generated by the motor itself can also make the motor oil temperature gradually rise, which greatly reduces the oil stirring loss and is conducive to improving the electric drive efficiency.

[0200] In some schemes, the flow rate of coolant flowing through the first branch is adjusted by controlling the first valve based on temperature detection information. This also includes controlling the first valve when the motor oil temperature is less than a first threshold and the coolant temperature is greater than the motor oil temperature, so that all the coolant in the first closed loop flows through the first branch or the flow rate of coolant flowing through the first branch is greater than the flow rate of coolant flowing through the second branch.

[0201] In this case, it is applied to Figure 3B When the structure shown is executed, it controls the first solenoid valve 4011 to open; applied to Figure 3C When the structure shown is configured, it controls the first solenoid valve 4011 to open and the second solenoid valve 4013 to close.

[0202] Here, the coolant temperature being higher than the motor oil temperature may be due to heat generated by the aforementioned heat-generating components (such as the range extender, on-board charger, etc.), causing the coolant temperature to rise. Thus, in scenarios where the motor oil temperature is lower but the coolant temperature is higher, all or most of the coolant flows through the oil-water heat exchanger in the first branch. This coolant can heat the oil flowing through the heat exchanger, increasing the motor oil temperature and reducing oil churning losses.

[0203] See Figure 11 , Figure 11 This is a schematic diagram of the internal fluid flow in the oil-water heat exchanger of the first type of thermal management system provided in the embodiments of this application. Figure 11In this context, an oil-water heat exchanger includes coolant channels and oil channels. Coolant channels are indicated in light colors, while oil channels are indicated in dark colors. See also... Figure 11 In scenario (1), where the motor oil temperature is below the first threshold, oil flows through the oil channel of the oil-water heat exchanger, but no coolant flows through the coolant channel. See also Figure 11 In scenario (2), where the motor oil temperature is less than the first threshold and the coolant temperature is greater than the motor oil temperature, oil flows through the oil channel of the oil-water heat exchanger, and coolant flows through the coolant channel of the oil-water heat exchanger. Here, Figure 11 This is just one example.

[0204] In some possible embodiments, the temperature detection information mentioned above also includes the temperature of the heating component. If the temperature of the motor oil is less than the first threshold, and the temperature of the heating component is greater than the second threshold, the control device may also execute the following control strategy: control the flow rate of the coolant output by the first water pump to the first closed loop based on the temperature of the heating component, wherein the second threshold is greater than the first threshold.

[0205] Here, the second threshold can be set by the user based on experience or by the factory default setting. If the temperature of the heating element is greater than the second threshold, it indicates that the temperature of the heating element is too high and that the heating element needs to be cooled down.

[0206] For example, when the heat-generating component includes multiple devices, such as a motor controller and an 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 it can control the flow rate of the coolant output by the first water pump based on the highest temperature of these multiple devices.

[0207] Here, the higher the temperature of the heat-generating component, the greater the flow rate of coolant output from the first water pump controlled by the control device. Thus, the coolant in the first closed-loop circuit carries away more heat as it flows through the heat-generating component, enhancing the cooling effect and achieving rapid cooling. Furthermore, even with a large coolant flow rate in the first closed-loop circuit, the oil-water heat exchange system ensures that the coolant in the first closed-loop circuit flows through the oil-water heat exchanger as little as possible or not at all, preventing the motor oil from being cooled.

[0208] Furthermore, the first closed-loop circuit may also include a second valve and a second connector. The second valve, heat dissipation components, 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. Therefore, the thermal management system is... Figure 4 The thermal management system shown. In this case, the aforementioned control device is also connected to a second valve. When applied to Figure 4 In the thermal management system shown, the implementation method of the second valve varies. Figure 4It can be further refined into the above. Figure 5A or Figure 5B .exist Figure 5B In this context, "the control device is connected to the second valve" means that the control device is connected to the solenoid valve 2102, or that the control device is connected to both the solenoid valve 2102 and the solenoid valve 2103 (in the presence of the solenoid valve 2103).

[0209] When applied Figure 4 In the thermal management system shown, if the temperature of the heat-generating component is greater than the second threshold, the control can also execute the following control strategy: control the second valve so that the flow rate of the coolant flowing through the fourth branch is zero or the flow rate of the coolant flowing through the third branch is greater than the flow rate of the coolant flowing through the fourth branch.

[0210] As an example, the second valve is a three-way proportional valve and the second connector is a three-way valve, see above for example. Figure 5A As shown. Before controlling the second valve, the control device first determines the coolant flow rate in the current first closed-loop circuit as a second value, and obtains the flow rate ratio of the coolant flowing through the third branch as a second proportional value based on the second value and the motor oil temperature. Therefore, controlling the second valve includes: controlling the second valve based on the second proportional value. Here, the method for obtaining the second proportional value can refer to the description of the method for obtaining the first proportional value, and will not be repeated here. The second valve is a three-way proportional valve, which can control the flow rate ratio of the coolant flowing through the third branch and the fourth branch respectively, improving the precision of control and enabling more accurate adjustment of the motor oil temperature.

[0211] As another example, when the second valve includes a third solenoid valve and a third three-way valve, and the second connector is a fourth three-way valve, the third solenoid valve is used to control the opening of the third branch, as described above. Figure 5B As shown. Therefore, controlling the second valve includes: controlling the opening of the third solenoid valve. In conjunction with the above... Figure 5B When the temperature of the heat-generating component exceeds the second threshold, the solenoid valve 2102 is opened. In this way, all the coolant in the first closed-loop circuit flows through the third branch, allowing for effective heat dissipation and facilitating cooling of the heat-generating component.

[0212] In some designs, the second valve also includes a fourth solenoid valve, which is positioned on the fourth branch to control the flow of the fourth branch, for example, see [reference needed]. Figure 5B Therefore, controlling the second valve could mean controlling the third solenoid valve to open and controlling the fourth solenoid valve to close. (Combined) Figure 5B That is, to control the opening of solenoid valve 2102 and the closing of solenoid valve 2103.

[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 Figure 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... Figure 6 The thermal management system shown. In this case, the 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... Figure 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 Figure 10In this embodiment, the thermal management system establishes a bypass branch for the coolant flow path of the oil-water heat exchanger by setting a first valve and a first connector. Based on the acquired temperature detection information, the first valve can be controlled to adjust the flow rate of coolant flowing through the first branch. Since the first branch contains an oil-water heat exchanger, the flow rate of coolant flowing through the heat exchanger can be adjusted. This allows for dynamic adjustment of the coolant flow rate through the oil-water heat exchanger based on the motor's oil temperature. This prevents heat loss when the motor's oil temperature is low, and the motor's own heat generation helps the motor's oil temperature gradually rise, reducing oil churning losses and improving electric drive efficiency and vehicle range.

[0220] For the aforementioned second type of thermal management system (e.g.) Figure 7 or Figures 8A-8C This application provides yet another thermal management control method, see [link to relevant documentation]. Figure 12 . Figure 12 The method shown can be applied to Figure 1 The control device shown can be used to control the vehicle's thermal management system, such as the one described above. Figure 7 The thermal management system shown in any of these examples. Similarly, this control device can also be used to control the aforementioned motor system.

[0221] 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 oil pump outputs oil to the first closed-loop circuit. The second closed-loop circuit includes a first water pump and a coolant flow channel for the oil-water heat exchanger. The first water pump outputs coolant to the second closed-loop circuit. The oil-water heat exchange system includes an oil flow channel for the oil-water heat exchanger, a first valve, and a first connector. The first valve, the oil flow channel for the oil-water heat exchanger, and the first connector are sequentially connected to form a first branch. The first valve and the first connector are sequentially connected to form a second branch in parallel with the first branch. The oil-water heat exchanger is used to realize the heat transfer between the oil flowing through the oil-water heat exchanger and the coolant flowing through the oil-water heat exchanger. Figure 7 The thermal management system shown.

[0222] Here, the control device is connected to both the oil pump and the first valve. Due to the different implementation methods of the first valve, Figure 7 It can be further refined into the above. Figure 8A , Figure 8B or Figure 8C .exist Figure 8B In this context, "the control device is connected to the first valve" means that the control device is connected to the first solenoid valve 4011. Figure 8C In this context, "the control device is connected to the first valve" means that the control device is connected to the first solenoid valve 4011 and the second solenoid valve 4013 respectively.

[0223] S1101: Obtain temperature detection information, including the motor oil temperature. Please refer to [link / reference needed] for this step. Figure 10 The description of Example S1001 will not be repeated here for the sake of brevity.

[0224] S1102: Based on temperature detection information, adjust the flow rate of oil flowing through the first branch by controlling the first valve.

[0225] In one implementation, based on temperature detection information, the flow rate of the oil flowing through the first branch is adjusted by controlling a first valve. This includes: when the motor oil temperature is lower than a first threshold, controlling the first valve to make the flow rate of the oil flowing through the first branch zero or lower than the flow rate of the oil flowing through the second branch. Thus, in scenarios where the motor oil temperature is low, the motor oil may not flow through the oil-water heat exchanger of the first branch, or only partially flow through it. The oil flowing only through the oil-water heat exchanger will have its heat carried away by the coolant flowing through it, resulting in minimal or no heat loss from the motor oil. In some embodiments, this implementation also includes the condition that the coolant temperature is lower than the motor oil temperature.

[0226] As an example, the first valve is a three-way proportional valve, and the first connector is a three-way valve, as shown above. Figure 8A As shown. Before controlling the first valve, the control device first determines the current oil flow rate in the first closed-loop circuit as the target value, and obtains the target proportion of the oil flow rate through the first branch as the target proportion value based on the target value and the oil temperature of the motor. Therefore, controlling the first valve includes: controlling the first valve based on the target proportion value. For example, the control device can obtain the current oil flow rate in the first closed-loop circuit based on the parameters of the oil pump, such as the pump speed, inlet pressure, and outlet pressure. The first valve is a three-way proportional valve, which can control the oil flow rate proportions through the first branch and the second branch respectively, improving the precision of control and enabling more accurate adjustment of the motor's oil temperature.

[0227] In one possible implementation, the target proportion of oil flow through the first branch is obtained based on the target value and the motor's oil temperature. This includes: looking up mapping information based on the target value and the motor's oil temperature to obtain the target proportion of coolant flow through the first branch. The mapping information includes the correspondence between the target value, the motor's oil temperature, and the target proportion. In some solutions, the target proportion can also be calculated based on the target value, the motor's oil temperature, and the motor's ideal oil temperature. The ideal oil temperature of the motor refers to the temperature that the motor's oil is expected to reach.

[0228] It is understandable that, given the same target value, the lower the oil temperature of the motor, the smaller the target ratio value, and the higher the oil temperature of the motor, the larger the target ratio value.

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

[0230] As another example, the first valve includes a first solenoid valve and a first three-way valve, and the first connector is a second three-way valve, as shown above. Figure 8B As shown. Therefore, controlling the first valve includes: controlling the first solenoid valve to close. In conjunction with the above... Figure 8B When the oil temperature of the motor is lower than the first threshold, the first solenoid valve 4011 is closed, so that the oil in the first closed loop flows through the second branch, and the flow rate of the oil flowing through the first branch is zero, that is, the oil does not flow through the oil-water heat exchanger. Therefore, the oil of the motor will not be cooled down, and the heat generated by the motor itself can also make the oil temperature of the motor gradually rise, which greatly reduces the oil stirring loss and is conducive to improving the electric drive efficiency.

[0231] Furthermore, if the first valve also includes a second solenoid valve, the second solenoid valve is located on the second branch, for example, see the above. Figure 8C As shown. Therefore, controlling the first valve includes: controlling the first solenoid valve to close and controlling the second solenoid valve to open. Combined with... Figure 8C When the motor oil temperature is lower than the first threshold, controlling the first solenoid valve 4011 to close and the second solenoid valve 4013 to open can achieve zero flow of coolant through the first branch, that is, the oil does not flow through the oil-water heat exchanger. Therefore, the motor oil will not be cooled down, and the heat generated by the motor itself can also make the motor oil temperature gradually rise, which greatly reduces the oil stirring loss and is conducive to improving the electric drive efficiency.

[0232] In another implementation, the second closed loop also includes a heating element, and the temperature detection information also includes the temperature of the heating element. The control device can also execute the following control strategy: when the temperature of the heating element is greater than a second threshold, the flow rate of the coolant output by the first water pump to the second closed loop is controlled based on the temperature of the heating element, wherein the second threshold is greater than the first threshold.

[0233] In some schemes, the flow rate of the oil flowing through the first branch is adjusted by controlling the first valve based on temperature detection information. This also includes: when the oil temperature of the motor is less than a first threshold and the temperature of the coolant is greater than the oil temperature of the motor, controlling the first valve so that all the oil in the first closed loop flows through the first branch or the flow rate of the oil flowing through the first branch is greater than the flow rate of the oil flowing through the second branch.

[0234] In this case, it is applied to Figure 8B When the structure shown is executed, it controls the first solenoid valve 4011 to open; applied to Figure 8C When the structure shown is configured, it controls the first solenoid valve 4011 to open and the second solenoid valve 4013 to close.

[0235] Here, the coolant temperature being higher than the motor oil temperature may be due to heat generated by the aforementioned heat-generating components (such as the range extender, on-board charger, etc.), causing the coolant temperature to rise. Thus, in scenarios where the motor oil temperature is lower but the coolant temperature is higher, all or most of the oil flows through the oil-water heat exchanger in the first branch. This coolant flowing through the heat exchanger heats the oil flowing through it, increasing the motor oil temperature and reducing oil churning losses.

[0236] See Figure 13 , Figure 13 This is a schematic diagram of the internal fluid flow in the oil-water heat exchanger of the second type of thermal management system provided in the embodiments of this application. Figure 13 In this context, an oil-water heat exchanger includes coolant channels and oil channels. Coolant channels are indicated in light colors, while oil channels are indicated in dark colors. See also... Figure 13 In scenario (1), where the oil temperature of the motor is less than the first threshold, the oil flow channel of the oil-water heat exchanger may be empty, while the coolant flow channel may have coolant flowing through it. See also Figure 13 In scenario (2), where the motor oil temperature is less than the first threshold and the coolant temperature is greater than the motor oil temperature, oil flows through the oil channel of the oil-water heat exchanger, and coolant flows through the coolant channel of the oil-water heat exchanger. Here, Figure 13 This is just one example.

[0237] Implementation Figure 12 In this embodiment, the thermal management system establishes a bypass branch for the oil flow path of the oil-water heat exchanger by setting a first valve and a first connector. Based on the acquired temperature detection information, the first valve can be controlled to adjust the flow rate of the oil flowing through the first branch. Since the first branch contains an oil-water heat exchanger, the flow rate of the oil flowing through the heat exchanger can be adjusted. This allows for dynamic adjustment of the oil flow rate through the oil-water heat exchanger based on the motor's oil temperature. This prevents heat loss when the motor's oil temperature is low, and the motor's own heat generation helps the motor's oil temperature gradually rise, reducing oil churning losses and improving electric drive efficiency and vehicle range.

[0238] See Figure 14 , Figure 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., Figure 2 , Figures 3A-3C , Figure 4 , Figures 5A-5B or Figure 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 Figure 10 The method described in the embodiments. Figure 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., Figure 7 or Figures 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., Figure 9A or Figure 9B ).

[0242] In this case, the control device 300 can be used to achieve Figure 12 The method described in the embodiments. Figure 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 the units in the control device 300 described above is only a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, the units in the device can be implemented by a processor calling software; for example, the device includes a processor connected to a memory containing instructions. The processor calls the instructions stored in the memory to implement any of the above methods or to implement the functions of each unit in the device. The processor can be, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory can be internal or external to the device. Alternatively, the units in the device can be implemented as hardware circuits. The functionality of some or all units can be achieved through the design of these hardware circuits, which can be understood as one or more processors. For example, in one implementation, the hardware circuit is an application-specific integrated circuit (ASIC). The functionality of some or all of the above units is achieved through the design of the logical relationships between the components within the circuit. In another implementation, the hardware circuit can be implemented using a programmable logic device (PLD). Taking a field-programmable gate array (FPGA) as an example, it can include a large number of logic gates. The connection relationships between the logic gates are configured through a configuration file, thereby achieving the functionality of some or all of the above units. All units of the above device can be implemented entirely through processor-invoked software, entirely through hardware circuits, or partially through processor-invoked software with the remaining parts implemented through hardware circuits.

[0244] In this application embodiment, a processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a type of microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationships of hardware circuits. These logical relationships of hardware circuits are fixed or reconfigurable. For example, the processor is a hardware circuit implemented using an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and configuring the hardware circuit can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units. Furthermore, it can also be a hardware circuit designed for artificial intelligence, which can be understood as a type of ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), or a deep learning processing unit (DPU).

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

[0246] Furthermore, the units in the above devices can be integrated in whole or in part, or they can be implemented independently. In one implementation, these units are integrated together as a system-on-a-chip (SOC). The SOC may include at least one processor for implementing any of the above methods or implementing the functions of the units in the device. The at least one processor may be of different types, such as CPU and FPGA, CPU and artificial intelligence processor, CPU and GPU, etc.

[0247] See Figure 15 , Figure 15 This is a schematic diagram of the structure of a control device provided in an embodiment of this application. Figure 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 via the bus 414. It should be understood that this application does not limit the number of processors and memories in the control device 400.

[0248] In one implementation, the control device 400 is the vehicle's thermal management controller or a component within the thermal management controller, such as a chip or integrated circuit. For example, the control device 400 includes the aforementioned control unit 300.

[0249] Bus 414 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, Figure 15 The bus 414 may be represented by a single line, but this does not mean that there is only one bus or one type of bus. The bus 414 may include a path for transmitting information between various components of the control device 400 (e.g., memory 413, processor 411, communication interface 412).

[0250] The processor 411 can be referred to the relevant description of the processor in the above embodiments, and will not be repeated here.

[0251] Memory 413 provides storage space, which can store data such as the operating system and computer programs. Memory 413 can be one or a combination of several of the following: random access memory (RAM), erasable programmable read-only memory (EPROM), read-only memory (ROM), or compact disc read memory (CD-ROM). Memory 413 can exist independently or be integrated within processor 411.

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

[0253] The processor 411 in the control device 400 is used to read the computer program stored in the memory 413 to execute the aforementioned method, for example... Figure 10 or Figure 12 The method described.

[0254] In one possible design, the control device 400 may be an execution device. Figure 10 The processor 411, which is the execution body of the method shown (which controls one or more modules in the aforementioned first-type thermal management system), can be used to read one or more computer programs stored in memory to perform the following operations:

[0255] Temperature detection information, including the oil temperature of the motor, is obtained through the communication unit 310.

[0256] Based on the temperature detection information, the flow rate of the coolant flowing through the first branch is adjusted by controlling the first valve.

[0257] In one possible design, the control device 400 may be an execution device. Figure 12 The processor 411, which is the execution body of the method shown (used to control one or more modules of the aforementioned second-type thermal management system or motor system), can be used to read one or more computer programs stored in memory to perform the following operations:

[0258] Temperature detection information, including the oil temperature of the motor, is obtained through the communication unit 310.

[0259] Based on the temperature detection information, the flow rate of the oil flowing through the first branch is adjusted by controlling the first valve.

[0260] In some embodiments, this application also provides a vehicle that includes the aforementioned first type of thermal management system (e.g. Figure 2 , Figures 3A-3C , Figure 4 , Figures 5A-5B or Figure 6 ), or include the aforementioned second type of thermal management system (e.g. Figure 7 or Figures 8A-8C ), or include the aforementioned motor system (e.g. Figure 9A or Figure 9B ).

[0261] In the embodiments described above, each embodiment has its own emphasis. For parts not described in detail in a particular embodiment, please refer to the relevant descriptions in other embodiments. Furthermore, in the embodiments of this application, unless otherwise specified or logically conflicting, the terminology and / or descriptions between the embodiments are consistent and can be mutually referenced. Technical features from different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0262] It should be noted that those skilled in the art will recognize that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing related hardware. This program 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), compactdisc read-only memory (CD-ROM) or other optical disc storage, disk storage, magnetic tape storage, or any other computer-readable medium capable of carrying or storing data.

[0263] The technical solution of this application, in essence, or the part that makes the contribution, or all or part of the technical solution, can be embodied in the form of a software product. The computer program product is stored in a storage medium and includes several instructions to cause a device (which may be a personal computer, server, network device, robot, microcontroller, chip, robot, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.

Claims

1. A thermal management system for a vehicle, characterized in that, The thermal management system includes a first closed-loop circuit, which includes a first water pump, a heat dissipation component, a heat generation component, and an oil-water heat exchange system. The first water pump is used to output coolant to the first closed-loop circuit. The oil-water heat exchange system includes a coolant flow channel of an oil-water heat exchanger, a first valve, and a first connector. The first valve, the coolant flow channel of the oil-water heat exchanger, and the first connector are sequentially connected to form a first branch. The first valve and the first connector are sequentially connected to form a second branch in parallel with the first branch. The first valve is used to control the flow rate of the coolant in the first closed loop through the first branch. The oil-water heat exchanger is used to realize the heat transfer between the coolant flowing through the oil-water heat exchanger and the oil in the motor.

2. The system according to claim 1, characterized in that, 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 used to receive the coolant in the first closed loop. The first outlet of the first valve is connected to the first valve port of the first connector through the coolant 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 valve port of the first connector to form the second branch. The third valve port of the first connector is used to collect and output the coolant from the first valve port and the second valve port of the first connector.

3. The system according to claim 1, characterized in that, The first valve includes a first solenoid 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 used to receive coolant in the first closed loop. The second port of the first three-way valve is connected to the first port of the first connector in sequence through the first solenoid valve and the coolant 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 used to collect and output the coolant from the first port and the second port of the first connector. The first solenoid 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 includes a second valve and a second connector, wherein the second valve, the heat dissipation component, and the second connector are sequentially connected to form a third branch, and the second valve and the second connector are sequentially connected to form a fourth branch in parallel with the third branch. The second valve is used to control the flow rate of coolant in the first closed-loop circuit through the third branch.

5. The system according to claim 4, characterized in that, The second valve is a three-way proportional valve, and the second connector is a three-way valve; wherein, the first inlet of the second valve is used to receive coolant in the first closed loop, the first outlet of the second valve is connected to the first valve port of the second connector via the heat dissipation component to form the third branch, the second outlet of the second valve is sequentially connected to the second valve port of the second connector to form the fourth branch, and the third valve port of the second connector is used to collect and output the coolant from the first valve port and the second valve port of the second connector.

6. The system according to any one of claims 1-5, characterized in that, The thermal management system further includes a second closed-loop circuit, which includes a second water pump, an engine waste heat exchanger, a second solenoid valve, and a coolant flow channel for 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 solenoid valve is used to control the conduction of the second closed-loop circuit.

7. A thermal management system for a vehicle, characterized in that, 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 oil pump is used 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 used 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 sequentially connected to form a first branch. The first valve and the first connector are sequentially connected to form a second branch in parallel with the first branch. The first valve is used to control the flow rate of the oil in the first closed loop through the first branch. The oil-water heat exchanger is used to realize the 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 according to claim 7, characterized in that, 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 used to receive the oil in the first closed loop. The first outlet of the first valve is connected to the first valve port of the first connector 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 to the second valve port of the first connector to form the second branch. The third valve port of the first connector collects and outputs the oil from the first valve port and the second valve port of the first connector.

9. The system according to claim 7, characterized in that, The first valve includes a first solenoid valve and a first three-way valve. When the first connector is a second three-way valve, the first valve port of the first three-way valve is used to receive oil in the first closed loop. The second valve port of the first three-way valve is connected to the first valve port of the first connector in sequence through the first solenoid valve and the oil 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 to the second valve port of the first connector to form the second branch. The third valve port of the first connector collects and outputs oil from the first valve port and the second valve port of the first connector. The first solenoid valve is used to control the conduction of the first branch.

10. The system according to claim 9, characterized in that, The first valve further includes a second solenoid valve. The third valve port of the first three-way valve is connected to the second valve port of the first connector through the second solenoid valve to form the second branch. The second solenoid valve is used to control the conduction of the second branch.

11. A motor system, characterized in that, The motor system includes a first closed-loop circuit, which includes a motor, an oil pump, a first valve, and a first connector. The inlet of the first valve is used to receive the oil output by the oil pump. The first outlet of the first valve and the first inlet of the first connector are respectively used to connect the two ends of the oil flow channel of the oil-water heat exchanger. The second outlet of the first valve is connected to the second inlet of the first connector. The outlet of the first connector is used to collect and output the oil from the first inlet and the second inlet of the first connector. The first valve is used to adjust the flow rate of the oil flowing through the oil-water heat exchanger.

12. The system according to claim 11, characterized in that, The motor system includes the oil-water heat exchanger, which is used to realize the heat transfer between the oil flowing through the oil-water heat exchanger and the coolant flowing through the oil-water heat exchanger.

13. The system according to claim 11 or 12, characterized in that, The first valve is a three-way proportional valve, and the first connector is a three-way valve; or... The first valve includes a first solenoid valve and a first three-way valve, and the first connector is a second three-way valve.

14. The system according to claim 13, characterized in that, When the first valve includes a first solenoid valve and a first three-way valve, the inlet of the first valve is the first valve port of the first three-way valve, the first outlet of the first valve is the outlet of the first solenoid valve, the second valve port of the first three-way valve is connected to the inlet of the first solenoid valve, and the second outlet of the first valve is the third valve port of the first three-way valve.

15. A thermal management control method, characterized in that, The method is used to control the thermal management system of a vehicle. The thermal management system includes a first closed-loop circuit, which includes a first water pump, a cooling component, an oil-water heat exchange system, and a heating component. The first water pump is used to output coolant to the first closed-loop circuit. The oil-water heat exchange system includes a first valve, a first connector, and a coolant flow channel of an oil-water heat exchanger. The first valve, the coolant flow channel of the oil-water heat exchanger, and the first connector are sequentially connected to form a first branch. The first valve and the first connector are sequentially connected to form a second branch in parallel with the first branch. The oil-water heat exchanger is used to realize heat transfer between the coolant flowing through the oil-water heat exchanger and the oil in the motor. The method includes: Acquire temperature detection information, including the oil temperature of the motor; Based on the temperature detection information, the flow rate of the coolant flowing through the first branch is adjusted by controlling the first valve.

16. The method according to claim 15, characterized in that, The step of adjusting the flow rate of coolant flowing through the first branch by controlling the first valve based on the temperature detection information includes: When the oil temperature of the motor is less than a first threshold, the first valve is controlled so that the flow rate of the coolant flowing through the first branch is zero or the flow rate of the coolant flowing through the first branch is less than the flow rate of the coolant flowing through the second branch.

17. The method according to claim 16, characterized in that, 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 used to receive the coolant in the first closed loop. The first outlet of the first valve is connected to the first valve port of the first connector through the coolant 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 valve port of the first connector to form the second branch. The third valve port of the first connector is used to collect and output the coolant from the first valve port and the second valve port of the first connector. Before controlling the first valve, the method further includes: The current flow rate of coolant in the first closed loop is determined to be a first value; Based on the first value and the oil temperature of the motor, the flow rate ratio of the coolant flowing through the first branch is obtained as the first ratio value. The control of the first valve includes: controlling the first valve based on the first proportional value.

18. The method according to claim 16, characterized in that, The first valve includes a first solenoid valve and a first three-way valve. The first connector is a second three-way valve. The first valve port of the first three-way valve is used to receive coolant in the first closed loop. The second valve port of the first three-way valve is connected to the first valve port of the first connector in sequence through the first solenoid valve and the coolant 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 to the second valve port of the first connector to form the second branch. The third valve port of the first connector is used to collect and output the coolant from the first valve port and the second valve port of the first connector. The control of the first valve includes: controlling the first solenoid valve to close.

19. The method according to claim 15, characterized in that, The temperature detection information also includes the temperature of the coolant, and the step of adjusting the flow rate of the coolant flowing through the first branch by controlling the first valve based on the temperature detection information includes: When the oil temperature of the motor is less than a 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 coolant output by the water pump flows through the first branch, or the flow rate of the coolant flowing through the first branch is greater than the flow rate of the coolant flowing through the second branch.

20. The method according to any one of claims 15-19, characterized in that, The temperature detection information also includes the temperature of the heating element, and the method further includes: When the temperature of the heating element is greater than the second threshold, the flow rate of the coolant output by the first water pump to the first closed loop is controlled based on the temperature of the heating element, wherein the second threshold is greater than the first threshold.

21. The method according to any one of claims 15-19, characterized in that, The temperature detection information also includes the temperature of the heating element, and the method further includes: When the temperature of the heating element is less than the third threshold, the first water pump is controlled 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.

22. The method according to any one of claims 15-21, characterized in that, The first closed-loop circuit 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. The method further includes: When the temperature of the heating element is greater than the second threshold, the second valve is controlled so that the flow rate of the coolant flowing through the fourth branch is zero or the flow rate of the coolant flowing through the third branch is greater than the flow rate of the coolant flowing through the fourth branch.

23. The method according to any one of claims 15-22, characterized in that, The thermal management system further includes a second closed-loop circuit, which includes a second water pump, an engine waste heat exchanger, a second 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. The method further includes: When the oil temperature of the motor is lower than the first threshold, the second solenoid valve is controlled to open.

24. A thermal management control method, characterized in that, The method is used to control the 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 coolant flow channel of an oil-water heat exchanger. The water pump is used 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 sequentially connected to form a first branch. The first valve and the first connector are sequentially connected to form a second branch in parallel with the first branch. The first valve is used to control the flow rate of the oil output by the oil pump in the first closed-loop circuit through 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 coolant flowing through the oil-water heat exchanger. The method includes: Acquire temperature detection information, including the oil temperature of the motor; Based on the temperature detection information, the flow rate of the oil flowing through the first branch is adjusted by controlling the first valve.

25. The method according to claim 24, characterized in that, The step of adjusting the flow rate of oil flowing through the first branch by controlling the first valve based on the temperature detection information includes: When the oil temperature of the motor is less than a first threshold, the first valve is controlled 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.

26. The method according to claim 25, characterized in that, 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 used to receive the oil in the first closed loop. The first outlet of the first valve is connected to the first valve port of the first connector 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 to the second valve port of the first connector to form the second branch. The third valve port of the first connector is used to collect and output the oil from the first valve port and the second valve port of the first connector. Before controlling the first valve, the method further includes: The current oil flow rate in the first closed-loop circuit is determined as the target value; Based on the target value and the oil temperature of the motor, the flow rate ratio of the oil flowing through the first branch is obtained as the target ratio value. The control of the first valve includes: controlling the first valve based on the target proportional value.

27. The method according to claim 25, characterized in that, The first valve includes a first solenoid valve and a first three-way valve. The first connector is a second three-way valve. The first valve port of the first three-way valve is used to receive oil in the first closed loop. The second valve port of the first three-way valve is connected to the first valve port of the first connector in sequence through the first solenoid valve and the oil 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 to the second valve port of the first connector to form the second branch. The third valve port of the first connector is used to collect and output the oil from the first valve port and the second valve port of the first connector. The control of the first valve includes: controlling the first solenoid valve to close.

28. The method according to claim 24, characterized in that, The temperature detection information also includes the temperature of the coolant at the inlet of the coolant channel of the oil-water heat exchanger. Adjusting the flow rate of the oil flowing through the first branch by controlling the first valve based on the temperature detection information includes: When the oil temperature of the motor is less than a 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 rate of the oil flowing through the first branch is greater than the flow rate of the oil flowing through the second branch.

29. The method according to any one of claims 24-28, characterized in that the second closed-loop circuit further includes a heating element, the temperature detection information further includes the temperature of the heating element, and the method further includes: When the temperature of the heating element is greater than the second threshold, the flow rate of the coolant output by the water pump to the second closed loop is controlled based on the temperature of the heating element, wherein the second threshold is greater than the first threshold.

30. The method according to any one of claims 24-28, characterized in that, The second closed-loop circuit further includes a heating element, and the temperature detection information further includes the temperature of the heating element. The method further includes: When the temperature of the heating element is less than the third threshold, the water pump is controlled to make the flow rate of the coolant in the second closed loop zero or to make the flow rate of the coolant in the second closed loop less than the flow rate threshold.

31. A device for thermal management control, characterized in that, The device includes a communication unit and a processing unit, and is used to implement the method according to any one of claims 15-23, or to implement the method according to any one of claims 24-30.

32. A chip, characterized in that, The chip includes a memory and a processor, the memory storing computer program instructions, and the processor executing the computer program instructions to cause the chip to perform the method as described in any one of claims 15-23, or to perform the method as described in any one of claims 24-30.

33. A control system, characterized in that, The control system includes a control device and a target system. The control device is used to control the target system. When the control device performs the method according to any one of claims 15-23, the target system is a thermal management system according to any one of claims 1-6. When the control device performs the method according to any one of claims 24-30, the target system is a thermal management system according to any one of claims 7-10 or a motor system according to any one of claims 11-14.

34. A vehicle, characterized in that, The vehicle includes a thermal management system as described in any one of claims 1-10, or a motor system as described in claims 11-14, or the device as described in claim 31, or the chip as described in claim 32, or the control system as described in claim 33.

35. A computer program product, characterized in that, When the computer program product is run on a processor, it causes the implementation of the method as claimed in any one of claims 15-23, or the implementation of the method as claimed in any one of claims 24-30.

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