Thermal management system, control method thereof and vehicle

Abstract

The invention provides a thermal management system, a control method thereof and a vehicle. The thermal management system comprises an air conditioner warm air loop, an engine temperature management loop and an electric drive temperature management loop. The electrically-driven temperature management loop comprises an electrically-driven branch and an intercooler branch which are connected in parallel, the air conditioner warm air loop and the engine temperature management loop are connected into an integrated loop through an integrated valve set, and the electrically-driven branch, the intercooler branch, the air conditioner warm air loop and a main pipeline of the electrically-driven temperature management loop are connected through a first multi-way valve. The controlled ends of the integrated valve group and the first multi-way valve receive instructions sent by the controller, and the conduction state is changed under the instructions of the controller. According to the scheme, connection of the temperature management loop is achieved through the integrated valve set and the first multi-way valve, the pipeline layout is simple, the number of assembly parts is reduced, and the temperature regulation and control difficulty is lowered.

Description

Technical Field

[0001] The present application relates to the technical field of thermal management, and particularly relates to a thermal management system, a control method thereof, and a vehicle. Background Art

[0002] Compared with pure electric vehicles, range-extended vehicles are provided with a range extender. Therefore, the functions of the thermal management system in current pure electric vehicles cannot meet the thermal management requirements of range-extended vehicles. Since the working principle of the range extender is similar to that of the engine in fuel vehicles, the thermal management circuit of the range extender in current range-extended vehicles follows the engine thermal management circuit in traditional fuel vehicles.

[0003] In the existing technical solutions, when directly combining the thermal management circuit of the range extender with the existing thermal management system of a pure electric vehicle, valves are directly arranged between the thermal management circuit of the range extender and other thermal management circuits to connect different thermal pipeline circuits. For example, a valve is arranged between the thermal management circuit of the range extender and the thermal management circuit of the electric drive, and a valve is arranged between the thermal management circuit of the range extender and the thermal management circuit of the battery, etc. This results in a complex pipeline layout, an increase in the number of assembled parts, and also has a high difficulty in regulating the connection relationship between each circuit. Summary of the Invention

[0004] The technical problem to be solved by the present application is the problem of the complex structure and large control difficulty of the thermal management system of existing range-extended vehicles. For this reason, the present application proposes a thermal management system, a control method thereof, and a vehicle.

[0005] In a first aspect, the technical solution of the present application provides a thermal management system, including an air-conditioning warm air circuit, an engine temperature management circuit, and an electric drive temperature management circuit; the electric drive temperature management circuit includes a parallel electric drive branch and an intercooler branch; the system further includes:

[0006] An integrated valve group that connects the air-conditioning warm air circuit and the engine temperature management circuit into an integrated circuit;

[0007] A first multi-way valve, whose first port is connected to one end of the electric drive branch and one end of the intercooler branch; its second port is connected to one end of the air-conditioning warm air circuit, its third port is connected to the main pipeline of the electric drive temperature management circuit, and its fourth port is connected to the other end of the air-conditioning warm air circuit;

[0008] The controlled ends of the integrated valve group and the first multi-way valve receive instructions sent by the controller and change the conduction state under the instructions of the controller.

[0009] In some embodiments of the thermal management system described above, it further includes:

[0010] A second multi-way valve, whose first port is connected to the main pipeline of the electric-driven temperature management loop, whose second port is connected to the other end of the electric-driven branch, and whose third port is connected to the other end of the intercooler branch;

[0011] The controlled end of the second multi-way valve receives the instruction sent by the controller and changes the conduction state under the instruction of the controller.

[0012] In some embodiments of the thermal management system, it further includes:

[0013] A first water pump, arranged at the first port of the first multi-way valve;

[0014] The controlled end of the first water pump receives the control signal sent by the controller and operates under the control of the control signal to adjust the medium flow rate of the electric-driven temperature management loop.

[0015] In some embodiments of the thermal management system, the electric-driven temperature management loop includes a first temperature sensor and a second temperature sensor;

[0016] The first temperature sensor is arranged between the first multi-way valve and the first water pump to detect the first temperature of the medium flowing into the first water pump;

[0017] The second temperature sensor is arranged between the first port of the second multi-way valve and the main pipeline of the electric-driven temperature management loop to detect the second temperature of the medium flowing into the main pipeline of the electric-driven temperature management loop through the second multi-way valve;

[0018] The first temperature sensor sends the first temperature of the medium to the controller, and the second temperature sensor sends the second temperature of the medium to the controller; the first temperature of the medium, the second temperature of the medium and the difference between the two are used by the controller to adjust the instruction and the control signal of the first water pump.

[0019] In some embodiments of the thermal management system, it further includes a battery temperature management loop:

[0020] The battery temperature management loop includes a battery cooler;

[0021] The integrated valve group includes a third multi-way valve; the first port of the third multi-way valve is connected to the main loop of the battery temperature management loop; the second port of the third multi-way valve is connected to one end of the heat exchanger in the engine temperature management loop; the third port of the third multi-way valve serves as one end of the air-conditioning and heating loop and is connected to the second port of the first multi-way valve, and is also connected to one end of the battery cooler; the fourth port of the third multi-way valve is connected to the other end of the heat exchanger;

[0022] The controlled end of the third multi-way valve receives an instruction sent by the controller and changes its conduction state under the instruction.

[0023] In some of the described thermal management systems, the second water pump is arranged in the main pipeline of the battery temperature management loop. The controlled end of the second water pump receives a control signal sent by the controller and operates under the control of the control signal to adjust the flow rate of the medium in the battery temperature management loop.

[0024] The battery temperature management loop includes a third temperature sensor. The third temperature sensor detects the third temperature of the medium in the battery temperature management loop and sends it to the controller. The third temperature of the medium is used by the controller to adjust the instruction to adjust the control signal of the second water pump.

[0025] In a second aspect, the technical solution of the present application provides a control method for the thermal management system according to any one of the first aspects. When the vehicle is driving in the range-extended mode, the method includes:

[0026] Obtain the outlet water temperature of the engine temperature management loop and the outlet water temperature of the air-conditioning warm air loop.

[0027] If the outlet water temperature of the engine temperature management loop is greater than the outlet water temperature of the air-conditioning warm air loop, control the integrated valve group and the first multi-way valve in the thermal management system to actuate, connect the engine temperature management loop and the air-conditioning warm air loop, make the medium in the engine temperature management loop flow to the air-conditioning warm air loop, and disconnect the passage between the second port of the first multi-way valve and the air-conditioning warm air loop.

[0028] If the outlet water temperature of the engine temperature management loop is less than or equal to the outlet water temperature of the air-conditioning warm air loop, control the integrated valve group in the thermal management system to actuate and disconnect the passage between the engine temperature management loop and the air-conditioning warm air loop.

[0029] In some of the described control methods for the thermal management system, it further includes: controlling the second multi-way valve in the thermal management system to actuate and connect the intercooler and the main pipeline of the electric drive temperature management loop.

[0030] In some of the described control methods for the thermal management system, if the vehicle is not driving in the range-extended mode, the method further includes:

[0031] Obtain the battery temperature.

[0032] If the battery temperature is greater than the set threshold, control the integrated valve group to actuate and disconnect the connection between the battery temperature management loop and the engine temperature management loop.

[0033] If the battery temperature is less than or equal to the set threshold, obtain the medium temperature and the ambient temperature of the electric drive temperature management loop;

[0034] If the difference between the medium temperature of the electric drive temperature management loop and the ambient temperature is greater than the set temperature difference, control the first multi-way valve and the third multi-way valve to actuate, and connect the electric drive temperature management loop and the battery cooler.

[0035] The control method of the thermal management system in some solutions further includes:

[0036] If the difference between the medium temperature of the electric drive temperature management loop and the ambient temperature is less than or equal to the set temperature difference, determine whether the ambient temperature is less than or equal to the working temperature threshold;

[0037] If the ambient temperature is less than or equal to the working temperature threshold, control the first multi-way valve and the third multi-way valve to actuate, disconnect or connect the electric drive temperature management loop and the battery cooler, and at the same time connect the air-conditioning refrigerant circuit and the battery temperature management loop;

[0038] If the ambient temperature is greater than the working temperature threshold, control the integrated valve group and the first multi-way valve to actuate, connect the air-conditioning warm air circuit and the battery temperature management loop, and disconnect the electric drive temperature management loop and the air-conditioning warm air circuit.

[0039] In some solutions, the control method of the thermal management system further includes that if the medium temperature of the electric drive temperature management loop is less than the set lower limit threshold, control the first multi-way valve to actuate, disconnect the electric drive temperature management loop and the air-conditioning warm air circuit until the medium temperature of the electric drive temperature management loop is greater than or equal to the set lower limit threshold.

[0040] The control method of the thermal management system in some solutions further includes:

[0041] Obtain the medium temperature of the electric drive temperature management loop, and the temperature difference between the medium flowing into the electric drive temperature management loop and the medium flowing out of the electric drive temperature management loop;

[0042] Obtain the medium temperature of the battery temperature management loop;

[0043] If the temperature difference is not within the set difference range, increase the operating power of the first water pump to increase the medium flow rate of the electric drive temperature management loop;

[0044] If the medium temperature of the battery temperature management loop is higher than the upper limit temperature threshold, increase the operating power of the second water pump to increase the medium flow rate of the electric drive temperature management loop.

[0045] In a third aspect, the technical solution of the present application provides a storage medium, in which program information is stored. After a computer reads the program information, it executes the control method of the thermal management system according to any one of the second aspects.

[0046] In a fourth aspect, the technical solution of the present application provides an electronic device, which includes at least one processor and at least one memory. Program information is stored in at least one of the memories. After at least one of the processors reads the program information, it executes the control method of the thermal management system according to any one of the second aspects.

[0047] In a fifth aspect, the technical solution of the present application provides a vehicle, which includes the thermal management system according to any one of the first aspects and the electronic device according to the fourth aspect; the processor in the electronic device controls the conduction states of the integrated valve group and / or the first multi-way valve and / or the second multi-way valve in the thermal management system.

[0048] Adopting the above technical solutions, the following beneficial effects are achieved:

[0049] The technical solution of the present application provides a thermal management system, its control method, and a vehicle. The thermal management system therein includes an air-conditioning warm air circuit, an engine temperature management circuit, and an electric drive temperature management circuit; the electric drive temperature management circuit includes a parallel electric drive branch and an intercooler branch, and the air-conditioning warm air circuit and the engine temperature management circuit are connected into an integrated circuit through an integrated valve group. The electric drive branch, the intercooler branch, the air-conditioning warm air circuit, and the main pipeline of the electric drive temperature management circuit are connected by a first multi-way valve. The controlled ends of the integrated valve group and the first multi-way valve receive instructions sent by the controller and change the conduction states under the instructions of the controller. Through the solution in the present application, the engine temperature management circuit and the air-conditioning warm air circuit form an integrated circuit, and the electric drive temperature management circuit is connected to the air-conditioning warm air circuit through the first multi-way valve, that is, connected to the motor temperature management circuit. Thus, this solution realizes the connection of the three temperature management circuits only through the integrated valve group and the first multi-way valve, with a simple pipeline layout and a reduced number of assembled parts. Since the controlled objects are only the integrated valve group and the first multi-way valve, the temperature regulation difficulty is reduced. Description of the Drawings

[0050] Figure 1 It is a schematic structural diagram of the thermal management system in an embodiment of the present application;

[0051] Figure 2 It is a schematic structural diagram of the thermal management system in another embodiment of the present application;

[0052] Figure 3 It is a schematic structural diagram of the integration of the motor temperature management circuit and the air-conditioning warm air circuit in an embodiment of the present application;

[0053] Figure 4 Schematic diagram of the structure of the thermal management system according to another embodiment of the present application;

[0054] Figure 5 Flowchart of the control method of the thermal management system according to an embodiment of the present application;

[0055] Figure 6 Flowchart of the control method of the thermal management system according to another embodiment of the present application;

[0056] Figure 7 Schematic diagram of the structure for connecting the motor temperature management circuit and the air-conditioning warm air circuit in the thermal management system according to an embodiment of the present application;

[0057] Figure 8 Schematic diagram of the structure for connecting the motor temperature management circuit, the air-conditioning warm air circuit and the electric drive temperature management circuit in the thermal management system according to an embodiment of the present application;

[0058] Figure 9 Schematic diagram of the structure for connecting the air-conditioning warm air circuit and the battery temperature management circuit in the thermal management system according to an embodiment of the present application;

[0059] Figure 10 Schematic diagram of the structure for connecting the battery temperature management circuit and the electric drive temperature management circuit in the thermal management system according to an embodiment of the present application;

[0060] Figure 11 Schematic diagram of the structure for connecting the battery temperature management circuit and the air-conditioning warm air circuit in the thermal management system according to an embodiment of the present application;

[0061] Figure 12 Schematic diagram of the structure for connecting the battery temperature management circuit, the air-conditioning warm air circuit and the electric drive temperature management circuit in the thermal management system according to an embodiment of the present application;

[0062] Figure 13 Schematic diagram of the structure for connecting the battery temperature management circuit and the air-conditioning refrigerant circuit in the thermal management system according to an embodiment of the present application;

[0063] Figure 14 Schematic diagram of the structure for the electric drive temperature management circuit to assist the air-conditioning refrigerant circuit to achieve heating or dehumidification functions in the thermal management system according to an embodiment of the present application;

[0064] Figure 15 Schematic diagram of the structure for the battery temperature management circuit to assist the air-conditioning refrigerant circuit to achieve heating or dehumidification functions in the thermal management system according to an embodiment of the present application;

[0065] Figure 16This is a schematic structural diagram of the heating function of the battery realized by the electric drive temperature management circuit assisting the battery temperature management circuit in the thermal management system in the embodiment of the present application;

[0066] Figure 17 This is a schematic structural diagram of the electric drive branch in the electric drive circuit in the thermal management system in the embodiment of the present application being blocked from operation and the air-conditioning warm air circuit being connected to the battery temperature management circuit;

[0067] Figure 18 This is a schematic structural diagram of the electric drive branch in the electric drive circuit in the thermal management system in the embodiment of the present application being blocked from operation;

[0068] Figure 19 This is a schematic diagram of the hardware connection relationship of the electronic device that executes the control method of the thermal management system in the embodiment of the present application. Detailed implementation manners

[0069] The following further describes the detailed implementation manners of the present application with reference to the drawings.

[0070] It is easy to understand that according to the technical solution of the present application, under the condition of not changing the essence of the present application, there are various structural manners and implementation manners that can be mutually replaced by those of ordinary skill in the art. Therefore, the following detailed implementation manners and the drawings are only exemplary descriptions of the technical solution of the present application, and should not be regarded as the whole of the present application or as a limitation or restriction on the technical solution of the application.

[0071] The orientation terms such as up, down, left, right, front, back, front side, back side, top, bottom, etc. mentioned or possibly mentioned in this specification are defined relative to the structures shown in the respective drawings, and they are relative concepts. Therefore, they may change accordingly according to their different positions and different usage states. Therefore, these or other orientation terms should not be construed as restrictive terms.

[0072] The embodiment of the present application is applicable to vehicles including an air-conditioning temperature management circuit, an engine temperature management circuit, and an electric drive temperature management circuit. The air-conditioning temperature management circuit includes an air-conditioning warm air circuit and an air-conditioning refrigerant circuit. The electric drive temperature management circuit includes an intercooler branch and an electric drive branch. The components and connection relationships included in the above-mentioned respective temperature managements can be set according to the existing components and connection relationships in existing vehicles. The following solutions of the present application focus on elaborating the technical content of whether different circuits are connected to reasonably utilize the surplus heat in each circuit.

[0073] The embodiment of the present application provides a thermal management system, as Figure 1As shown in the figure, it includes an air-conditioning warm air circuit, an engine temperature management circuit, and an electric drive temperature management circuit. The electric drive temperature management circuit includes a parallel electric drive branch and an intercooler branch; the system also includes an integrated valve group, and the integrated valve group connects the air-conditioning warm air circuit and the engine temperature management circuit into an integrated circuit; a first multi-way valve FTF, its first port 21 is connected to one end of the electric drive branch and one end of the intercooler branch; its second port 22 is connected to one end of the air-conditioning warm air circuit, its third port is connected to the main pipeline of the electric drive temperature management circuit, and its fourth port is connected to the other end of the air-conditioning warm air circuit; the controlled ends of the integrated valve group and the first multi-way valve FTF receive instructions sent by the controller and change the conduction state under the instructions of the controller. The controller can be a component with control functions in the vehicle, such as a vehicle controller, an electronic control unit, etc. The controller can control the thermal management system to issue the instructions under the condition of user trigger operation, or automatically monitor each circuit and automatically generate instructions to control the integrated valve group and the first multi-way valve FTF. For example, when the first multi-way valve FTF only conducts the first port and the third port and disconnects the second port and the fourth port. The electric drive temperature management circuit is isolated from other circuits. When the first multi-way valve FTF conducts the first port and the second port, as well as the third port and the fourth port, the electric drive circuit is connected to the air-conditioning warm air circuit. At this time, if the integrated valve group also conducts the engine temperature management circuit and the air-conditioning warm air circuit, the connection of the engine temperature management circuit, the air-conditioning warm air circuit, and the electric drive temperature management circuit is realized.

[0074] In the thermal management system of the above embodiment of the present application, the electric drive temperature management circuit includes a parallel electric drive branch and an intercooler branch, and the air-conditioning warm air circuit and the engine temperature management circuit are connected into an integrated circuit through an integrated valve group. The main pipelines of the electric drive branch, the intercooler branch, the air-conditioning warm air circuit, and the electric drive temperature management circuit are connected by using a first multi-way valve. The controlled ends of the integrated valve group and the first multi-way valve receive instructions sent by the controller and change the conduction state under the instructions of the controller. Through the solution in the present application, the engine temperature management circuit and the air-conditioning warm air circuit form an integrated circuit, and the electric drive temperature management circuit is connected to the air-conditioning warm air circuit through the first multi-way valve, that is, connected to the motor temperature management circuit. Thus, this solution realizes the connection of the three temperature management circuits only through the integrated valve group and the first multi-way valve, with a simple pipeline layout and a reduced number of assembled parts. Since the controlled objects are only the integrated valve group and the first multi-way valve, the difficulty of temperature regulation is reduced.

[0075] In some solutions, such as Figure 2As shown, the thermal management system further includes a second multi-way valve STF, whose first port 11 is connected to the main pipeline of the electric drive temperature management loop, whose second port 12 is connected to the other end of the electric drive branch, and whose third port 13 is connected to the other end of the intercooler branch; the controlled end of the second multi-way valve STF receives the instruction sent by the controller and changes the conduction state under the instruction of the controller.

[0076] In the above solution, a second multi-way valve STF is arranged in the electric drive temperature management loop, and the access state of the intercooler branch is controlled by changing the conduction state of the second multi-way valve STF. The intercooler usually operates in the range extender mode. Therefore, if the vehicle is not running in the range extender mode, the third port 13 of the second multi-way valve STF can be disconnected from the intercooler branch. Therefore, the above solution can meet the temperature management requirements under different loads of the vehicle.

[0077] In the above solution of the embodiment of the present application, the connection relationship between the motor temperature management loop, the air-conditioning heating loop and the integrated valve group is as Figure 3 shown. The integrated valve group has an integrated valve component, and the integrated valve component includes a port V0, a port V1, a port V2, a port V3 and a port V4. Among them, the port V0 controls the water flow at the outlet of the engine temperature management loop, the port V1 controls the radiator water flow of the air-conditioning heating loop, the port V2 controls the water flow from the engine temperature management loop to the air-conditioning heating loop, the port V3 controls the water flow of the air-conditioning heating loop under pure electric working conditions, and the port V4 controls the water flow of the exhaust gas recirculation loop and the on-off of the engine bleed-off loop. In the range extender mode, the engine temperature is relatively high. At this time, the hot water of the engine temperature management loop can be used to heat the passenger compartment. At this time, the port V0 and the port V2 are opened, and the port V1 and the port V3 are closed. In the range extender mode, when the engine has a cooling requirement, the port V0, the port V1 and the port V4 can be opened to cool the branch with requirements in the engine.

[0078] As Figure 2 and Figure 4As shown, the thermal management system further includes a battery temperature management circuit, and the battery temperature management circuit includes a battery cooler BMSC. The integrated valve group includes a third multi-way valve STF3. The first port 31 of the third multi-way valve is connected to the main circuit of the battery temperature management circuit. The second port 32 of the third multi-way valve is connected to one end of a heat exchanger SSH in the engine temperature management circuit. The third port 33 of the third multi-way valve serves as one end of the air-conditioning warm air circuit and is connected to the second port 22 of the first multi-way valve, and is also connected to one end of the battery cooler BMSC. The fourth port 34 of the third multi-way valve is connected to the other end of the heat exchanger SSH. The controlled end of the third multi-way valve STF3 receives an instruction sent by the controller and changes its conduction state under the instruction.

[0079] By adjusting the connection relationships between the ports in the integrated valve components of the integrated valve group, the third multi-way valve STF3 and the heat exchanger SSH, the pairwise connection or disconnection of the air-conditioning warm air circuit, the motor temperature management circuit, the battery temperature management circuit, and the electric drive temperature management circuit can be achieved. As Figure 4 shown, compared with the existing pipeline layout, the pipeline layout of the entire thermal management system only adds three multi-way valves and one integrated valve component, with a simple structure and fewer components.

[0080] In some solutions, as Figure 4 shown, the thermal management system further includes a first water pump Pump1, which is arranged at the first port 21 of the first multi-way valve. The controlled end of the first water pump Pump1 receives a control signal sent by the controller and operates under the control of the control signal to adjust the medium flow rate of the electric drive temperature management circuit. Through the solution of the present application, the first water pump Pump1 can be used to change the medium flow rate of the electric drive temperature management circuit, change the temperature change speed and change amount of the electric drive temperature management circuit, so that the electric drive temperature management circuit achieves the optimal temperature management efficiency.

[0081] Further, the electric drive temperature management loop in the thermal management system includes a first temperature sensor SW1 and a second temperature sensor SW2; the first temperature sensor SW1 is disposed between the first multi-way valve and the first water pump Pump1 to detect the first temperature of the medium flowing into the first water pump Pump1; the second temperature sensor SW2 is disposed between the first port 11 of the second multi-way valve and the main pipeline of the electric drive temperature management loop to detect the second temperature of the medium flowing into the main pipeline of the electric drive temperature management loop through the second multi-way valve; the first temperature sensor SW1 sends the first temperature of the medium to the controller, and the second temperature sensor SW2 sends the second temperature of the medium to the controller; the first temperature of the medium, the second temperature of the medium, and the difference between the two are used by the controller to adjust the instruction and the control signal of the first water pump Pump1. By detecting the medium temperature at the corresponding position in the electric drive temperature management loop and sending it to the controller, the controller can obtain a more accurate control signal, so that the electric drive temperature management loop can achieve temperature management in a shorter time.

[0082] Further, the thermal management system further includes a second water pump Pump2, which is disposed in the main pipeline of the battery temperature management loop. The controlled end of the second water pump Pump2 receives the control signal sent by the controller and operates under the control of the control signal to adjust the flow rate of the medium in the battery temperature management loop; the battery temperature management loop includes a third temperature sensor SW3, which detects the third temperature of the medium in the battery temperature management loop and sends it to the controller. The third temperature of the medium is used by the controller to adjust the instruction to adjust the control signal of the second water pump Pump2. By detecting the medium temperature at the corresponding position in the battery temperature management loop and sending it to the controller, the controller can obtain a more accurate control signal to control the second water pump Pump2, so that the battery temperature management loop can achieve temperature management in a shorter time.

[0083] The embodiment of the present application further provides a control method for a thermal management system, which is applied to an existing controller in a vehicle, preferably applied to a controller of a temperature management loop in a vehicle. If the vehicle is running in an extended range mode, as Figure 1 shown, the method includes:

[0084] S10: Obtain the outlet temperature of the engine temperature management loop and the outlet temperature of the air-conditioning warm air loop;

[0085] By installing a variety of sensors in the vehicle, the outlet water temperature of the engine temperature management circuit and the outlet water temperature of the air-conditioning warm air circuit can be detected through the temperature sensors installed in the engine temperature management circuit and the air-conditioning warm air circuit. The controller is communicatively connected to the sensors and can directly obtain the detection results from the sensors.

[0086] S20: Determine whether the outlet water temperature of the engine temperature management circuit is greater than the outlet water temperature of the air-conditioning warm air circuit. If so, execute step S30; otherwise, execute step S40.

[0087] Simply subtract the two to determine whether the difference is greater than zero to obtain the judgment result.

[0088] S30: Control the integrated valve group and the first multi-way valve in the thermal management system to actuate, connect the engine temperature management circuit and the air-conditioning warm air circuit, enable the medium in the engine temperature management circuit to flow to the air-conditioning warm air circuit, and disconnect the path between the second port of the first multi-way valve and the air-conditioning warm air circuit.

[0089] As Figure 7 shown, port V0 and port V2 of the integrated valve component are connected, the third multi-way valve is connected to the heat exchanger, and the engine temperature management circuit is connected to the air-conditioning warm air circuit. In the solution of this application, as Figure 7 shown, the improved solution lies in that the third multi-way valve is connected to the heat exchanger, and this connection relationship is represented by a solid line. In the figure, there are partial disconnection connection methods in other circuits, which are used to distinguish from the solid line connection, indicating that the circuit is disconnected or the connection method is the same as the prior art without improvement. Correspondingly, Figures 8 - 18 in, the meanings expressed by the solid line and the dashed line are similar.

[0090] Because the medium temperature in the engine temperature management circuit is higher at this time, there is residual heat, and the residual heat can be utilized for the air-conditioning warm air circuit, thereby being able to reduce the energy consumption of the vehicle when the air conditioner provides warm air.

[0091] S40: Control the integrated valve group in the thermal management system to actuate, and disconnect the path between the engine temperature management circuit and the air-conditioning warm air circuit.

[0092] As Figure 8 shown, because the medium temperature in the engine temperature management circuit is lower at this time and there is no residual energy for the air-conditioning warm air circuit, the connection between the third multi-way valve and the heat exchanger is disconnected, and thus the engine temperature management circuit is disconnected from the air-conditioning warm air circuit. Figure 8 In the thermal management system shown, the first port and the third port of the third multi-way valve are connected, that is, the medium in the electric drive temperature management circuit can be connected to the battery temperature management circuit.

[0093] In the above solution of this application, during the range - extender mode, the heat generated by the range - extender and / or the operation of the electric drive can be reasonably utilized to assist in temperature management of the air - conditioning warm - air circuit and the battery temperature management circuit, reducing the consumption of the whole vehicle.

[0094] As Figure 7 and Figure 8 shown, if the vehicle is operating in the range - extender mode and the inter - cooler needs to operate, control the second multi - way valve STF in the thermal management system to actuate, connecting the inter - cooler branch to the main pipeline of the electric - drive temperature management circuit. Through this solution, the inter - cooler branch is integrated with the electric - drive temperature management circuit, and the inter - cooler branch can be controlled by the second multi - way valve STF. When the inter - cooler is not needed, this branch can be disconnected, enabling the thermal management system in this solution to adapt to more vehicle operating conditions.

[0095] As Figure 6 shown, if the vehicle is not operating in the range - extender mode, the method further includes:

[0096] S210: Obtain the battery temperature.

[0097] The battery temperature can be detected by a temperature sensor set on the vehicle battery, and the controller directly obtains the battery temperature from this temperature sensor.

[0098] S220: Determine whether the battery temperature is greater than the set threshold. If so, execute step S230; otherwise, execute step S310.

[0099] The set threshold is the minimum value of the temperature range that enables the battery to work in a better state. For example, if the battery has the best working state in the range of 25°C - 35°C, the set threshold can be selected as 25°C.

[0100] S230: Control the integrated valve group to actuate, disconnecting the connection between the battery temperature management circuit and the engine temperature management circuit.

[0101] When the battery temperature is greater than the set threshold, the battery can work in a better state. As Figure 9 shown, at this time, regardless of whether there is remaining heat in the engine temperature management circuit, there is no need to assist in heating the battery. Therefore, directly disconnect the battery temperature management circuit from the engine temperature management circuit. Correspondingly, the electric - drive temperature management circuit and the air - conditioning warm - air circuit also do not need to provide remaining heat to the battery temperature management circuit, and the above - mentioned circuits and the battery temperature management circuit are all in a disconnected state.

[0102] S310: Obtain the medium temperature and the ambient temperature of the electric - drive temperature management circuit.

[0103] After detecting the medium temperature of the electric drive temperature management circuit and the ambient temperature through the temperature sensors set in the electric drive temperature management circuit and the temperature sensors outside the vehicle, the detected temperatures are sent to the controller.

[0104] S320: Determine whether the difference between the medium temperature of the electric drive temperature management circuit and the ambient temperature is greater than the set temperature difference. If so, execute step S330; otherwise, execute step S410.

[0105] The set temperature difference can be used to determine whether the electric drive temperature management circuit has residual heat while maintaining the normal operation state of the vehicle. The set temperature difference can be selected as 10°C, that is, when the temperature of the electric drive is relatively high, the medium in its circuit is heated and the temperature rises rapidly.

[0106] S330: Then control the first multi-way valve and the third multi-way valve to actuate, and connect the electric drive temperature management circuit and the battery cooler.

[0107] As Figure 10 shown, after the first multi-way valve and the third multi-way valve actuate, it is equivalent to connecting the electric drive temperature management circuit and the battery temperature management circuit, so the residual heat in the electric drive temperature management circuit can be used to assist in heating the battery. The energy consumption of the battery temperature management circuit can be reduced.

[0108] S410: Determine whether the ambient temperature is less than or equal to the working temperature threshold. If so, execute step S420; otherwise, execute step S430.

[0109] When the ambient temperature is too low, the battery cannot work properly. At this time, the temperature of the battery needs to be heated to a certain temperature before the vehicle can be used normally. The working temperature threshold can be determined according to empirical values and is usually selected as -10°C.

[0110] S420: Control the first multi-way valve and the third multi-way valve to actuate, disconnect or connect the electric drive temperature management circuit and the battery cooler, and at the same time connect the air-conditioning refrigerant circuit and the battery temperature management circuit.

[0111] As Figure 11 shown, when the ambient temperature is too low, the battery temperature management circuit is heated by the air-conditioning refrigerant circuit. At this time, the electric drive does not work and there is no residual heat available in the electric drive temperature management circuit, so the electric drive temperature management circuit is isolated.

[0112] If the medium temperature in the electric drive temperature management circuit rises to a certain temperature value and it has residual heat to assist in heating the battery, as Figure 12 shown, the electric drive temperature management circuit can also be connected to the battery temperature management system.

[0113] S430: Control the integrated valve group and the first multi-way valve to actuate, connect the air-conditioning warm air circuit and the battery temperature management circuit, and disconnect the electric drive temperature management circuit from the air-conditioning warm air circuit.

[0114] As Figure 13 shown, the heat in the air-conditioning warm air circuit and the battery temperature management circuit can be utilized mutually. The heat generated by the battery can assist in heating the vehicle cabin, reducing the overall vehicle energy consumption.

[0115] Preferably, the above solution further includes: If the medium temperature of the electric drive temperature management circuit is less than the set lower limit threshold, control the first multi-way valve to actuate and disconnect the electric drive temperature management circuit from the air-conditioning warm air circuit until the medium temperature of the electric drive temperature management circuit is greater than or equal to the set lower limit threshold. Whether the electric drive temperature management circuit is connected to other circuits can be determined by the conduction states of the first multi-way valve and the third multi-way valve. When the electric drive operates under different working conditions, different amounts of heat are generated. In some cases when there is no remaining heat available, it can be disconnected from other circuits until the heat accumulated reaches a level where it can assist in heating other circuits and then it is connected to other circuits again. Through this solution, the thermal management system has different control methods for the electric drive temperature circuit under various working conditions, achieving the optimal thermal management efficiency.

[0116] Further preferably, the control method further includes: Obtain the medium temperature of the electric drive temperature management circuit, and the temperature difference between the medium flowing into the electric drive temperature management circuit and the medium flowing out of the electric drive temperature management circuit; obtain the medium temperature of the battery temperature management circuit; if the temperature difference is not within the set difference range, increase the operating power of the first water pump to increase the medium flow rate of the electric drive temperature management circuit; if the medium temperature of the battery temperature management circuit is higher than the upper temperature threshold, increase the operating power of the second water pump to increase the medium flow rate of the electric drive temperature management circuit.

[0117] The controller can control the operating speeds of the first water pump and the second water pump. If the medium flow rate is too slow, the heat absorption efficiency may be affected. The temperature sensor can be used to determine whether the heat absorption efficiency of the medium in the circuit can meet the thermal management requirements based on the medium temperature or the change in the medium temperature in the circuit. If the thermal management requirements cannot be met due to the small medium flow rate, the power of the water pump can be increased to make the temperature adjustment result of the thermal management system reach the best.

[0118] The thermal management system provided in the above embodiments of the present application can also have the following working modes: As Figure 14After the shown air-conditioning refrigerant circuit is connected to the electric drive temperature management circuit, the remaining heat in the electric drive temperature management circuit is used to be responsible for the air-conditioning refrigerant circuit to execute the heating or dehumidification mode. At this time, the engine temperature management circuit is disconnected from the air-conditioning warm air circuit. As Figure 15 shown, after closing the intercooler branch, the electric drive branch in the electric drive temperature management circuit is blocked and operated to increase the medium temperature in the electric drive temperature management circuit. At the same time, the battery temperature management circuit is connected to the air-conditioning refrigerant circuit, and the remaining heat of the battery temperature management circuit can assist the air-conditioning refrigerant circuit to execute the heating or dehumidification function. As Figure 16 shown, after the medium temperature in the electric drive temperature management system reaches a certain temperature value, it can be connected to the battery temperature management circuit to assist in heating the battery, while Figure 17 in [reference] is to introduce the remaining heat in the electric drive temperature management system into the air-conditioning refrigerant circuit to assist in heating the passenger compartment and the battery, Figure 18 in [reference] is to isolate the electric drive temperature management circuit, the electric drive is blocked and operated to increase the medium temperature of the circuit, and the air-conditioning refrigerant circuit makes full use of the remaining heat in the engine temperature management circuit to reduce the vehicle energy consumption. Each of the above modes can be realized by changing the conduction states of the integrated valve group, the first multi-way valve, and the second multi-way valve.

[0119] The embodiment of the present application also provides a storage medium, in which program information is stored. After the computer reads the program information, it executes the control method of the thermal management system according to any one of the solutions in the above method embodiments.

[0120] As Figure 19As shown in the figure, an embodiment of the present application further provides an electronic device. The electronic device includes at least one processor 191 and at least one memory 192. Program information is stored in at least one of the memories 192. After reading the program information, at least one of the processors 191 executes the control method of the thermal management system according to any of the above method embodiments. The device may further include: an input device 193 and an output device 194. The processor 191, the memory 192, the input device 193, and the output device 194 may be communicatively connected. The memory 192, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules. By running the non-volatile software programs, instructions, and modules stored in the memory 192, the processor 191 executes various functional applications and data processing, that is, implements the control method of the thermal management system provided by any of the above solutions. The memory 192 may include a program storage area and a data storage area. Among them, the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data created according to the use of the control method of the thermal management system. In addition, the memory 192 may include a high-speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices. In some embodiments, the memory 192 may optionally include a memory remotely set relative to the processor 191, and these remote memories may be connected to the device executing the control method of the thermal management system through a network. Examples of the above network include but are not limited to the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof. The input device 193 can receive input user clicks and generate signal inputs related to user settings and function controls of the control method of the thermal management system. The output device 194 may include a display device such as a display screen. When the one or more modules are stored in the memory 192 and run by the one or more processors 191, the control method of the thermal management system in any of the above method embodiments is executed.

[0121] An embodiment of the present application further provides a vehicle, including the thermal management system and the electronic device according to any of the above solutions; the processor in the electronic device controls the conduction state of the integrated valve group and / or the first multi-way valve and / or the second multi-way valve in the thermal management system. The thermal management system architecture in the vehicle includes temperature management circuits for the battery, electric drive, engine, and air conditioner; the entire system is optimized and combined in various modes to achieve the best energy efficiency of the system and comprehensive waste heat utilization.

[0122] According to needs, the above technical solutions can be combined to achieve the best technical effect.

[0123] The above are only the principles and preferred embodiments of this application. It should be noted that for those of ordinary skill in the art, based on the principles of this application, several other variations can also be made, which should also be regarded as the protection scope of this application.

Claims

1. A thermal management system, comprising an air-conditioning warm air circuit, an engine temperature management circuit, and an electric drive temperature management circuit; characterized in that, The electric drive temperature management circuit includes a parallel electric drive branch and an intercooler branch; the system further includes: An integrated valve group that connects the air-conditioning and heating circuit and the engine temperature management circuit into an integrated circuit; A first multi-way valve, whose first port is connected to one end of the electric drive branch and one end of the intercooler branch; its second port is connected to one end of the air-conditioning and heating circuit, its third port is connected to the main pipeline of the electric drive temperature management circuit, and its fourth port is connected to the other end of the air-conditioning and heating circuit; The controlled ends of the integrated valve group and the first multi-way valve receive instructions sent by the controller and change their conduction states under the instructions of the controller.

2. The thermal management system according to claim 1, characterized in that, It further includes: A second multi-way valve, whose first port is connected to the main pipeline of the electric drive temperature management circuit, its second port is connected to the other end of the electric drive branch, and its third port is connected to the other end of the intercooler branch; The controlled end of the second multi-way valve receives the instruction sent by the controller and changes its conduction state under the instruction of the controller.

3. The thermal management system according to claim 2, characterized in that, It further includes: A first water pump is arranged at the first port of the first multi-way valve; The controlled end of the first water pump receives the control signal sent by the controller and operates under the control of the control signal to adjust the medium flow rate of the electric drive temperature management circuit.

4. The thermal management system according to claim 3, characterized in that: The electric drive temperature management circuit includes a first temperature sensor and a second temperature sensor; The first temperature sensor is arranged between the first multi-way valve and the first water pump to detect the first temperature of the medium flowing into the first water pump; The second temperature sensor is arranged between the first port of the second multi-way valve and the main pipeline of the electric drive temperature management circuit to detect the second temperature of the medium flowing into the main pipeline of the electric drive temperature management circuit through the second multi-way valve; The first temperature sensor sends the first temperature of the medium to the controller, and the second temperature sensor sends the second temperature of the medium to the controller; the first temperature of the medium, the second temperature of the medium, and the difference between the two are used by the controller to adjust the instruction and the control signal of the first water pump.

5. The thermal management system according to claim 1, characterized in that, It further includes a battery temperature management circuit: The battery temperature management circuit includes a battery cooler; The integrated valve group includes a third multi-way valve; the first port of the third multi-way valve is connected to the main circuit of the battery temperature management circuit; the second port of the third multi-way valve is connected to one end of the heat exchanger in the engine temperature management circuit; the third port of the third multi-way valve serves as one end of the air-conditioning and heating circuit and is connected to the second port of the first multi-way valve, and is also connected to one end of the battery cooler; the fourth port of the third multi-way valve is connected to the other end of the heat exchanger; The controlled end of the third multi-way valve receives the instruction sent by the controller and changes its conduction state under the instruction.

6. The thermal management system according to claim 5, characterized in that: A second water pump is arranged in the main pipeline of the battery temperature management loop. The controlled end of the second water pump receives the control signal sent by the controller and operates under the control of the control signal to adjust the flow rate of the medium in the battery temperature management loop; A third temperature sensor is included in the battery temperature management loop. The third temperature sensor detects the third temperature of the medium in the battery temperature management loop and sends it to the controller. The third temperature of the medium is used by the controller to adjust the instruction to adjust the control signal of the second water pump.

7. A control method for the thermal management system according to any one of claims 1-6, characterized in that, If the vehicle is running in the range extender mode, the method includes: Obtaining the outlet water temperature of the engine temperature management loop and the outlet water temperature of the air-conditioning warm air loop; If the outlet water temperature of the engine temperature management loop is greater than the outlet water temperature of the air-conditioning warm air loop, controlling the integrated valve group and the first multi-way valve in the thermal management system to actuate, connecting the engine temperature management loop and the air-conditioning warm air loop, enabling the medium of the engine temperature management loop to flow to the air-conditioning warm air loop, and disconnecting the passage between the second port of the first multi-way valve and the air-conditioning warm air loop; If the outlet water temperature of the engine temperature management loop is less than or equal to the outlet water temperature of the air-conditioning warm air loop, controlling the integrated valve group in the thermal management system to actuate to disconnect the passage between the engine temperature management loop and the air-conditioning warm air loop.

8. The control method for the thermal management system according to claim 7, characterized in that, Controlling the second multi-way valve in the thermal management system to actuate to connect the intercooler and the main pipeline of the electric drive temperature management loop.

9. The control method for the thermal management system according to claim 7 or 8, characterized in that, If the vehicle is not running in the range extender mode, the method further includes: Obtaining the battery temperature; If the battery temperature is greater than the set threshold, controlling the integrated valve group to actuate to disconnect the connection between the battery temperature management loop and the engine temperature management loop; If the battery temperature is less than or equal to the set threshold, obtaining the medium temperature of the electric drive temperature management loop and the ambient temperature; If the difference between the medium temperature of the electric drive temperature management loop and the ambient temperature is greater than the set temperature difference, controlling the first multi-way valve and the third multi-way valve to actuate to connect the electric drive temperature management loop and the battery cooler.

10. The control method of the thermal management system according to claim 9, wherein, Further included is: If the difference between the medium temperature of the electric drive temperature management loop and the ambient temperature is less than or equal to the set temperature difference, determining whether the ambient temperature is less than or equal to the working temperature threshold; If the ambient temperature is less than or equal to the working temperature threshold, controlling the first multi-way valve and the third multi-way valve to actuate to disconnect or connect the electric drive temperature management loop and the battery cooler, and at the same time connecting the air-conditioning refrigerant loop and the battery temperature management loop; If the ambient temperature is greater than the working temperature threshold, controlling the integrated valve group and the first multi-way valve to actuate to connect the air-conditioning warm air loop and the battery temperature management loop, and disconnecting the electric drive temperature management loop and the air-conditioning warm air loop.

11. The control method of the thermal management system according to claim 10, wherein, Further included is: If the medium temperature of the electric drive temperature management circuit is less than the set lower limit threshold, control the first multi-way valve to actuate, disconnecting the electric drive temperature management circuit from the air-conditioning warm air circuit until the medium temperature of the electric drive temperature management circuit is greater than or equal to the set lower limit threshold.

12. The control method of the thermal management system according to claim 11, wherein, It further includes: Obtaining the medium temperature of the electric drive temperature management circuit, as well as the temperature difference between the medium flowing into the electric drive temperature management circuit and the medium flowing out of the electric drive temperature management circuit; Obtaining the medium temperature of the battery temperature management circuit; If the temperature difference is not within the set difference range, increase the operating power of the first water pump to increase the medium flow rate of the electric drive temperature management circuit; If the medium temperature of the battery temperature management circuit is higher than the upper temperature threshold, increase the operating power of the second water pump to increase the medium flow rate of the electric drive temperature management circuit.

13. A storage medium, wherein, The storage medium stores program information, and after the computer reads the program information, it executes the control method of the thermal management system according to any one of claims 7-12.

14. An electronic device, wherein, The electronic device includes at least one processor and at least one memory. At least one of the memories stores program information, and after at least one of the processors reads the program information, it executes the control method of the thermal management system according to any one of claims 7-12.

15. A vehicle, wherein, It includes the thermal management system according to any one of claims 1-6 and the electronic device according to claim 14; the processor in the electronic device controls the conduction states of the integrated valve group and / or the first multi-way valve and / or the second multi-way valve in the thermal management system.

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