Dual electric drive axle thermal management system and method, and electronic device and storage medium

Abstract

A dual electric drive axle thermal management system. The system comprises: a dual electric drive axle; a dual electric drive axle thermal management system, wherein the connection and disconnection between a middle-axle electric drive axle thermal management system and a rear-axle electric drive axle thermal management system is implemented by means of a traffic control valve (10); a vehicle thermal management system (3), which is connected to and disconnected from the dual electric drive axle thermal management system by means of a two-way valve (1); and a control system (6), which is used for acquiring the driving state and temperature of the electric drive axle, so as to make cooling loops (2) of the dual electric drive axle thermal management system be interconnected with each other, or make the vehicle thermal management system (3) be connected to the cooling loops (2) of the dual electric drive axle thermal management system. The dual electric drive axle thermal management system realizes on-demand thermal management, thereby further reducing the energy consumption of the thermal management system. Further provided are a dual electric drive axle thermal management method, an electronic device and a non-transitory computer-readable storage medium.

Description

A dual-drive bridge thermal management system, method, electronic device, and storage medium Technical Field

[0001] This invention relates to the field of electric drive technology, and more specifically to a dual-drive bridge thermal management system, method, electronic device, and storage medium. Background Technology

[0002] The thermal management system is an essential component of electric drive systems, crucial for ensuring their reliability and improving efficiency. The thermal management system of electric drive systems, such as electric drive axles, mainly consists of water pumps, radiators, valves, and water piping. When oil-cooled motors or active lubrication systems are used, it also includes oil pumps, heat exchangers, and oil piping. Based on this setup, it enables functions such as cooling the motor and lubricating oil with cooling water, and using waste heat from the motor to heat the battery.

[0003] For 6×4 and 8×4 electric commercial vehicles with dual-axle systems, the presence of two electric drive axles provides more possibilities for thermal management system configurations. However, current commercial vehicles with dual-axle systems primarily employ separate thermal management for each axle, neglecting collaborative thermal management of the entire dual-axle system. Adopting collaborative thermal management for both axles enables on-demand thermal management of both axles and reduces the energy consumption of the thermal management system.

[0004] Currently, although Chinese patent application CN109177718A discloses a dual-motor thermal management system and method for new energy vehicles, which uses a shared motor radiator assembly to simultaneously provide cooling for both the rear and front motor water circuits, providing a useful reference for a dual-drive axle thermal management system, this technical solution uses dual water pumps to achieve fluid supply to both motors, resulting in a relatively complex structure. Furthermore, it only uses a one-way shut-off valve and dual pump operation to achieve cooling control of the front motor based on temperature, resulting in a limited system functionality. Moreover, its energy consumption is relatively high. Summary of the Invention

[0005] The purpose of this invention is to provide a dual-drive bridge thermal management system, method, electronic device, and storage medium for the coordinated management and control of heat in the parallel-configured middle and rear drive bridges, thereby improving the performance of the dual-drive bridge thermal management system and reducing its energy consumption.

[0006] To achieve the above objectives, embodiments of the present invention provide a dual-drive electric bridge thermal management system, comprising:

[0007] A dual electric drive axle, comprising a middle axle electric drive axle and a rear axle electric drive axle, for jointly or individually driving the vehicle.

[0008] A dual-drive bridge thermal management system, comprising a middle axle thermal management system and a rear axle thermal management system, wherein the middle axle thermal management system and the rear axle thermal management system are connected and disconnected via a flow control valve; wherein both the middle axle thermal management system and the rear axle thermal management system include a temperature detection element for detecting the temperature of the dual-drive bridge;

[0009] The vehicle thermal management system connects and disconnects with the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system via a two-way valve, and is used to provide the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system with a preset temperature of cooling medium.

[0010] The control system is used to acquire the driving status of the middle axle electric drive axle and the rear axle electric drive axle, as well as the temperature detected by the temperature detection element, and, based on the driving status and the temperature, control the flow control valve to enable the cooling circuit between the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system for thermal management, or control the two-way valve to enable the cooling circuit between the vehicle thermal management system and the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system for thermal management.

[0011] Optionally, the middle axle electric drive bridge and the rear axle electric drive bridge are configured in parallel and are each equipped with a drive motor;

[0012] Both the middle axle electric drive bridge thermal management system and the rear axle electric drive bridge thermal management system are equipped with heat exchangers to cool the middle axle electric drive bridge and the rear axle electric drive bridge using cooling media.

[0013] Optionally, a control system is configured to acquire the drive status of the middle axle electric drive bridge and the rear axle electric drive bridge, as well as the temperature detected by a temperature sensing element, and, based on the drive status and the temperature, control the flow control valve to interconnect the cooling circuits between the middle axle electric drive bridge thermal management system and the rear axle electric drive bridge thermal management system for thermal management, including:

[0014] When at least one of the middle axle electric drive axle or the rear axle electric drive axle is not in operation, the flow control valve is controlled to make the cooling circuit between the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system interconnected for thermal management, and the two-way valve is controlled to make the cooling circuit between the vehicle thermal management system and the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system disconnected.

[0015] The output flow rate of the flow control valve is controlled based on the temperature detected by the temperature sensing element.

[0016] Optionally, the relationship between the flow rate of the cooling medium to the thermal management systems of the middle and rear axles electric drive bridges and the detected value of the temperature sensing element is as follows:

[0017] Q1:Q2 = t1:t2;

[0018] In the formula, Q1 and Q2 represent the flow rates of the cooling medium to the thermal management systems of the middle and rear axles electric drive bridges, respectively, and t1 and t2 represent the temperature detection values ​​of the temperature sensing elements of the middle and rear axles, respectively.

[0019] Optionally, a control system is configured to acquire the driving states of the middle axle electric drive axle and the rear axle electric drive axle, as well as the temperatures detected by temperature detection elements, and, based on the driving states and the temperatures, control the two-way valve to connect the cooling circuit between the vehicle thermal management system and the thermal management systems of the middle axle electric drive axle and the rear axle electric drive axle for thermal management, including:

[0020] When both the middle axle electric drive axle and the rear axle electric drive axle are in driving state, the two-way valve is controlled to connect the cooling circuit between the vehicle thermal management system and the thermal management systems of the middle axle electric drive axle and the rear axle electric drive axle for thermal management.

[0021] The output flow rate of the water pump in the cooling circuit is controlled based on the temperature detected by the temperature sensing element.

[0022] Optionally, the relationship between the pump's output flow rate, the two-way valve's connection status, and the temperature value detected by the temperature sensing element is as follows:

[0023] In the formula, Q represents the output flow rate of the water pump. max t1 represents the maximum output flow rate of the water pump, t2 represents the temperature value of the middle bridge electric drive bridge detected by the temperature sensing element, and t3 represents the temperature value of the rear bridge electric drive bridge detected by the temperature sensing element. max This indicates the temperature reference value.

[0024] On the other hand, the present invention also provides a dual electric drive bridge thermal management method applied to the above-described dual electric drive bridge thermal management system, comprising:

[0025] Acquire the drive status information of the dual electric drive bridge and the temperature information of the dual electric drive bridge detected by the temperature sensing element;

[0026] Adjust the connection status of the two-way valve and the flow control valve according to the drive status information of the dual electric drive axle to determine whether to conduct the cooling circuit between the vehicle thermal management system and the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system for thermal management, or whether to conduct the cooling circuit between the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system for thermal management.

[0027] Based on the temperature information of the dual electric drive bridge detected by the temperature sensing element, the flow rate of the flow control valve or the output flow rate of the water pump in the cooling circuit is controlled.

[0028] Optionally, the connection state of the two-way valve and the flow control valve is adjusted according to the drive status information of the dual electric drive axle to determine whether to conduct the cooling circuit between the vehicle thermal management system and the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system for thermal management, or whether to conduct the cooling circuit between the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system for thermal management, including:

[0029] When at least one of the middle axle electric drive axle or the rear axle electric drive axle is not in operation, the flow control valve is controlled to make the cooling circuit between the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system interconnected for thermal management, and the two-way valve is controlled to make the cooling circuit between the vehicle thermal management system and the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system disconnected.

[0030] When both the middle axle electric drive axle and the rear axle electric drive axle are in driving mode, the two-way valve is controlled to connect the cooling circuit between the vehicle thermal management system and the thermal management systems of the middle axle electric drive axle and the rear axle electric drive axle for thermal management.

[0031] On the other hand, the present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the dual electric drive bridge thermal management method described above.

[0032] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the dual electric drive bridge thermal management method described above.

[0033] Through the above technical solution, when both electric drive axles are in operation, the heat dissipation demand of the electric drive axles is relatively large. The vehicle thermal management system is connected to the dual electric drive axle thermal management system to achieve cooling of the electric drive axles. When only one electric drive axle is in operation, or when neither is in operation, the dual electric drive axle thermal management system is not connected to the vehicle thermal management system, reducing the demand on the cooling medium flow of the vehicle thermal management system. The electric drive axle thermal management system adjusts the distribution of the supplied cooling medium and the flow between the two electric drive axles according to the electric drive axle temperature to achieve on-demand thermal management and further reduce the energy consumption of the thermal management system.

[0034] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0035] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0036] Figure 1 is a schematic diagram of a dual electric drive bridge thermal management system provided in an embodiment of the present invention;

[0037] Figure 2 is an implementation flowchart of a dual electric drive bridge thermal management method applied to a dual electric drive bridge thermal management system provided by an embodiment of the present invention;

[0038] Figure 3 is a detailed implementation flowchart of a dual electric drive bridge thermal management method provided in an embodiment of the present invention;

[0039] Figure 4 is a schematic diagram of a dual electric drive bridge thermal management device provided in an embodiment of the present invention.

[0040] Explanation of reference numerals in the attached diagram: 1. Two-way valve; 2. Cooling circuit; 3. Vehicle thermal management system; 4. Rear axle electric drive axle thermal management system; 5. Rear axle electric drive axle; 6. Control system; 7. Middle axle electric drive axle; 8. Middle axle electric drive axle thermal management system; 9. Water pump; 10. Flow control valve. Detailed Implementation

[0041] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0042] Referring to Figure 1, which is a schematic diagram of a dual-drive electric bridge thermal management system provided in an embodiment of the present invention, the system includes:

[0043] A dual electric drive axle, comprising a middle axle electric drive axle 7 and a rear axle electric drive axle 5, for jointly or individually driving the vehicle.

[0044] A dual-drive bridge thermal management system includes a middle axle thermal management system 8 and a rear axle thermal management system 4. The middle axle thermal management system 8 and the rear axle thermal management system 4 are connected and disconnected via a flow control valve 10. Both the middle axle thermal management system 8 and the rear axle thermal management system 4 include temperature detection elements for detecting the temperature of the dual-drive bridge.

[0045] The vehicle thermal management system 3 connects and disconnects with the middle axle electric drive axle thermal management system 8 and the rear axle electric drive axle thermal management system 4 via a two-way valve 1, and is used to provide a cooling medium at a preset temperature to the middle axle electric drive axle thermal management system 8 and the rear axle electric drive axle thermal management system 4.

[0046] The control system 6 is used to acquire the driving status of the middle axle electric drive axle 7 and the rear axle electric drive axle 5, as well as the temperature detected by the temperature detection element, and according to the driving status and the temperature, control the flow control valve 10 to enable the cooling circuit 2 between the middle axle electric drive axle thermal management system 8 and the rear axle electric drive axle thermal management system 4 to be interconnected for thermal management, or control the two-way valve 1 to enable the vehicle thermal management system 3 to be connected to the cooling circuit 2 between the middle axle electric drive axle thermal management system 8 and the rear axle electric drive axle thermal management system 4 for thermal management.

[0047] In some embodiments, the middle axle electric drive bridge 7 and the rear axle electric drive bridge 5 are configured in parallel and are each equipped with a drive motor; the middle axle electric drive bridge thermal management system 8 and the rear axle electric drive bridge thermal management system 4 are both equipped with heat exchangers to cool the middle axle electric drive bridge 7 and the rear axle electric drive bridge 5 using a cooling medium.

[0048] Preferably, the heat exchanger is an oil-water heat exchanger. In this embodiment, the heat exchange power is between 5-15kW. It should be noted that the heat exchange power of the heat exchanger can be set according to the specific application scenario, and is not limited here.

[0049] In some embodiments, the control system 6 is configured to acquire the driving status of the middle axle electric drive axle 7 and the rear axle electric drive axle 5, as well as the temperature detected by the temperature detection element, and, based on the driving status and the temperature, control the flow control valve 10 to interconnect the cooling circuit 2 between the middle axle electric drive axle thermal management system 8 and the rear axle electric drive axle thermal management system 4 for thermal management. This includes: when at least one of the middle axle electric drive axle 7 or the rear axle electric drive axle 5 is not in a working state, controlling the flow control valve 10 to interconnect the cooling circuit 2 between the middle axle electric drive axle thermal management system 8 and the rear axle electric drive axle thermal management system 4 for thermal management; controlling the two-way valve to disconnect the vehicle thermal management system 3 from the cooling circuit 2 between the middle axle electric drive axle thermal management system 8 and the rear axle electric drive axle thermal management system 4; and controlling the output flow of the flow control valve 10 based on the temperature detected by the temperature detection element.

[0050] In other words, when at least one of the electric drive axles 7 or 5 is not in operation, the cooling circuit 2 is not connected to the vehicle thermal management system 3, but is directly connected to the water pump 9.

[0051] In some embodiments, the relationship between the flow rate of the cooling medium to the middle axle electric drive bridge thermal management system 8 and the rear axle electric drive bridge thermal management system 4 and the detected value of the temperature sensing element is: Q1:Q2=t1:t2;

[0052] In the formula, Q1 and Q2 represent the flow rates of the cooling medium to the thermal management systems of the middle and rear axles electric drive bridges, respectively, and t1 and t2 represent the temperature detection values ​​of the temperature sensing elements of the middle and rear axles, respectively.

[0053] In some embodiments, the control system 6 is configured to acquire the driving states of the middle axle electric drive axle 7 and the rear axle electric drive axle 5, as well as the temperature detected by the temperature detection element, and, based on the driving states and the temperature, control the two-way valve 1 to connect the cooling circuit 2 between the vehicle thermal management system 3 and the middle axle electric drive axle thermal management system 8 and the rear axle electric drive axle thermal management system 4 for thermal management. This includes: when both the middle axle electric drive axle 7 and the rear axle electric drive axle 5 are in the driving state, controlling the two-way valve 1 to connect the cooling circuit 2 between the vehicle thermal management system 3 and the middle axle electric drive axle thermal management system 8 and the rear axle electric drive axle thermal management system 4 for thermal management; and controlling the output flow rate of the water pump 9 in the cooling circuit 2 based on the temperature detected by the temperature detection element.

[0054] In other words, when both the middle axle electric drive bridge 7 and the rear axle electric drive bridge 5 are in operation, the cooling medium circuit is connected to the water pump 9 via the vehicle thermal management system 3.

[0055] Specifically, the relationship between the output flow rate of water pump 9, the connection status of two-way valve 1, and the temperature value detected by the temperature sensing element is as follows:

[0056] In the formula, Q represents the output flow rate of the water pump. max t1 represents the maximum output flow rate of the water pump, t2 represents the temperature value of the middle bridge electric drive bridge detected by the temperature sensing element, and t3 represents the temperature value of the rear bridge electric drive bridge detected by the temperature sensing element. max This indicates the temperature reference value.

[0057] For example, t1 represents the temperature reading of the middle axle temperature sensor, which is 50℃; t2 represents the temperature reading of the rear axle temperature sensor, which is 100℃; t max The temperature reference value is twice the preset temperature threshold, which is 2 × 80℃ = 160℃. Finally, the calculated output flow rate of water pump 9 is... This refers to the water pump output flow rate required by the dual electric drive bridge thermal management system at this time.

[0058] As can be seen from the above embodiments, the dual electric drive axle thermal management system provided in this application can realize the disconnection and connection of the cooling medium of the whole vehicle thermal management system 3 and the dual electric drive axle thermal management system through the two-way valve 1, realize the distribution of the cooling medium flow in the middle axle electric drive axle thermal management system 8 and the rear axle electric drive axle thermal management system 4 based on the flow control valve 10, and realize the control of the water pump 9 flow based on the temperature detection element in the middle axle electric drive axle thermal management system 8 and the rear axle electric drive axle thermal management system 4, laying the foundation for realizing the on-demand cooling function of the dual electric drive axle. Specifically, when both the middle axle electric drive axle 7 and the rear axle electric drive axle 5 are working, they are connected to the vehicle thermal management system 3. When only one electric drive axle is working, it is not connected to the vehicle thermal management system 3, and the other electric drive axle is used to cool the working electric drive axle. When the temperature of the two electric drive axles is high, that is, when the required cooling power is large, the water pump flow rate is large; when the temperature of the two electric drive axles is low, that is, when the required cooling power is small, the water pump flow rate is small. More cooling medium is allocated to the electric drive axle with higher temperature, and less cooling medium is allocated to the electric drive axle with lower temperature. While ensuring the reliability of the electric drive axle thermal management, the energy consumption of the thermal management system is reduced.

[0059] Referring to Figure 2, this is a flowchart illustrating an implementation method for a dual-drive bridge thermal management system according to an embodiment of the present invention, comprising the following steps:

[0060] Step 200: Obtain the drive status information of the dual electric drive bridge and the temperature information of the dual electric drive bridge detected by the temperature detection element.

[0061] In some implementations, a temperature threshold for the electric drive bridge is preset before performing step 200.

[0062] In a specific implementation, the preset temperature threshold is related to the installation position of the temperature sensing element. When the temperature sensing element is installed in the gearbox lubrication medium, the temperature threshold is 100°C; when the temperature sensing element is installed in the motor cooling medium, the temperature threshold is 80°C. Specifically, in this embodiment, the temperature sensing element is installed in the motor cooling medium, so the temperature threshold is 80°C.

[0063] Specifically, when executing step 200, it is found that the middle bridge electric drive bridge is in a driving state, and the detection value of the middle bridge temperature detection element is 50℃; the rear bridge electric drive bridge is not in a driving state, and the detection value of the rear bridge temperature detection element is 100℃.

[0064] Step 201: Adjust the connection status of the two-way valve and the flow control valve according to the drive status information of the dual electric drive axle to determine whether to conduct the cooling circuit between the vehicle thermal management system and the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system for thermal management, or whether to conduct the cooling circuit between the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system for thermal management.

[0065] Specifically, when performing step 201, the following steps can be performed:

[0066] S2010: When at least one of the middle axle electric drive axle or the rear axle electric drive axle is not in operation, the flow control valve is controlled to enable the cooling circuit between the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system for thermal management, and the two-way valve is controlled to disable the cooling circuit between the vehicle thermal management system and the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system.

[0067] For example, in this embodiment, the axle electric drive axle is in driving mode, while the rear axle electric drive axle is not in driving mode. Therefore, the control information of the two-way valve is: the cooling medium circuit does not pass through the vehicle thermal management system 3, but is directly connected to the water pump 9.

[0068] S2011: When both the middle axle electric drive axle and the rear axle electric drive axle are in driving state, control the two-way valve to connect the cooling circuit between the vehicle thermal management system and the thermal management systems of the middle axle electric drive axle and the rear axle electric drive axle for thermal management.

[0069] Step 202: Based on the temperature information of the dual electric drive bridge detected by the temperature sensing element, control the flow rate of the flow control valve or control the output flow rate of the water pump in the cooling circuit.

[0070] In some implementations, the flow control valve control information is determined based on the detection value information obtained from the temperature sensing element. Specifically, the relationship between the cooling medium flow rate to the middle axle electric drive bridge thermal management system 8 and the rear axle electric drive bridge thermal management system 4 and the detection value of the temperature sensing element is as follows:

[0071] Q1:Q2 = t1:t2, where Q1 and Q2 represent the flow rates of various cooling media to the thermal management systems of the middle and rear axles, respectively; t1 and t2 represent the detection values ​​of the temperature sensing elements of the middle and rear axles, respectively. In this embodiment, the detection value of the middle axle temperature sensing element is 50°C; the rear axle electric drive bridge is not in a driving state, and the detection value of the rear axle temperature sensing element is 100°C; therefore, the ratio of the flow rates of various cooling media to the thermal management systems of the middle and rear axles is determined to be 1:2.

[0072] In practice, the output flow rate of the water pump is correlated with the detection value of the temperature sensing element.

[0073] Specifically, the rules for controlling the water pump based on the connection status of the two-way valve and the detection value of the temperature sensing element are as follows:

[0074] Where Q represents the output flow rate of the water pump, Q max This indicates the maximum output flow rate of the water pump. t1 represents the temperature reading from the middle axle temperature sensor, which is 50℃; t2 represents the temperature reading from the rear axle temperature sensor, which is 100℃; t max The temperature reference value is twice the preset temperature threshold, which is 2 × 80℃ = 160℃. Finally, the calculated output flow rate of the water pump is: This refers to the water pump output flow rate required by the dual electric drive bridge thermal management system at this time.

[0075] As can be seen from the above embodiments, the dual electric drive axle thermal management method provided in this application realizes the connection control between the electric drive axle thermal management system and the vehicle thermal management system based on the drive state information of the electric drive axle, realizes the allocation of cooling medium flow to the middle axle thermal management system and the rear axle electric drive axle thermal management system based on the detection value information of the temperature detection element, and realizes the control of water pump flow based on the detection value of the temperature detection element. When the middle axle electric drive axle and the rear axle electric drive axle are working simultaneously, they are connected to the vehicle thermal management system. When they are not working simultaneously, thermal management is achieved using the non-working electric drive axle. When the temperature of a certain electric drive axle is high, the cooling medium flow allocated to that electric drive axle is also large, and when the temperature of a certain electric drive axle is high, the cooling medium flow allocated to that electric drive axle is also small. When the sum of the temperatures of the two electric drive axles is high, the calculated water pump output flow is also large, and when the sum of the temperatures of the two electric drive axles is low, the calculated water pump output flow is also small.

[0076] In summary, this application achieves thermal management of dual electric drive axles by using an unused electric drive axle in single-axle operation, which helps reduce the energy consumption of the vehicle's thermal management system; it controls the water pump flow based on the electric drive axle temperature information, with lower cooling flow when the electric drive axle temperature is low, further reducing the energy consumption of the vehicle's thermal management system; and it distributes the cooling medium flow based on the electric drive axle temperature information, with the electric drive axle with higher temperature receiving more cooling medium, ensuring the operational reliability of the electric drive axles.

[0077] Referring to Figure 3, a detailed implementation flowchart of a dual-drive electric bridge thermal management method provided by an embodiment of the present invention is shown, including the following execution steps:

[0078] S1: Configure the temperature threshold of the electric drive bridge.

[0079] In practice, the preset temperature threshold is related to the installation position of the temperature sensing element. When the temperature sensing element is installed in the gearbox lubrication medium, the temperature threshold is 100°C; when the temperature sensing element is installed in the motor cooling medium, the temperature threshold is 80°C. In this embodiment, the temperature sensing element is installed in the motor cooling medium, so the temperature threshold is 80°C.

[0080] S2: Obtain the drive status information of the middle and rear axle electric drive bridges and the detection value information of the temperature detection element.

[0081] Specifically, in this embodiment, the middle bridge electric drive bridge is in a driving state, and the detection value of the middle bridge temperature detection element is 50°C; the rear bridge electric drive bridge is not in a driving state, and the detection value of the rear bridge temperature detection element is 100°C.

[0082] S3: Determine whether the middle bridge electric drive bridge and the rear bridge electric drive bridge are in working condition. If yes, proceed to step S4; otherwise, proceed to step S5.

[0083] S4: The cooling medium circuit passes through the vehicle's thermal management system.

[0084] S5: The cooling medium pipeline does not pass through the thermal management system.

[0085] S6: Control the flow control valve based on the detection value information of the temperature sensing element.

[0086] S7: Control the water pump based on the detection value information of the document detection element.

[0087] Referring to Figure 4, which is a schematic diagram of a dual-drive bridge thermal management device provided in an embodiment of the present invention, the device includes:

[0088] Configuration module, the configuration module is used to configure the temperature threshold of the electric drive bridge;

[0089] The acquisition module is used to acquire the drive status information of the middle axle electric drive bridge and the detection value information of the temperature detection element, and to acquire the drive status information of the rear axle electric drive bridge and the detection value information of the temperature detection element.

[0090] The first judgment module is used to generate control information for the two-way valve based on the obtained drive status information of the electric drive bridge.

[0091] The second judgment module is used to generate control information for the flow control valve based on the detection value information of the acquired temperature detection element.

[0092] The third judgment module is used to generate control information for the water pump based on the detection value information obtained from the temperature detection element.

[0093] The control module is used to control the flow control valve based on the flow control valve control information and to control the water pump based on the water pump control information.

[0094] As can be seen from the above embodiments, the technical solution of this application has the following beneficial effects:

[0095] The solution provided in this application enables on-demand control of the thermal management of the dual electric drive axles through integration with the thermal management systems of the middle and rear axles, as well as a two-way valve and control system. It also controls the flow rate of the cooling medium in the dual electric drive axle thermal management system based on a water pump and control system. Furthermore, it achieves on-demand thermal management of the dual electric drive axles by distributing the cooling medium flow between the middle and rear axles using a flow control valve and control system. This results in the following effects: Firstly, when both electric drive axles are operating, their heat dissipation demand is high, and the vehicle's thermal management system connects with the dual electric drive axle thermal management system to cool them. Secondly, when only one electric drive axle is operating, or when neither is operating, the dual electric drive axle thermal management system does not connect with the vehicle's thermal management system, reducing the demand on the cooling medium flow of the vehicle's thermal management system. Thirdly, the electric drive axle thermal management system adjusts the distribution of the supplied cooling medium and its flow between the two electric drive axles based on their temperature, achieving on-demand lubrication and further reducing the energy consumption of the thermal management system.

[0096] On the other hand, the present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the dual electric drive bridge thermal management method described above.

[0097] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the dual electric drive bridge thermal management method described above.

[0098] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0099] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in one or more flowchart illustrations and / or one or more block diagrams.

[0100] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means that implement the functions specified in one or more flowcharts and / or one or more block diagrams.

[0101] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, such that the instructions, which execute on the computer or other programmable apparatus, provide steps for implementing the functions specified in one or more flowcharts and / or one or more block diagrams.

[0102] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0103] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0104] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0105] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0106] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A dual-drive electric bridge thermal management system, characterized in that, include: A dual electric drive axle, comprising a middle axle electric drive axle and a rear axle electric drive axle, for jointly or individually driving the vehicle. A dual-drive bridge thermal management system, comprising a middle axle thermal management system and a rear axle thermal management system, wherein the middle axle thermal management system and the rear axle thermal management system are connected and disconnected via a flow control valve; wherein both the middle axle thermal management system and the rear axle thermal management system include a temperature detection element for detecting the temperature of the dual-drive bridge; The vehicle thermal management system connects and disconnects with the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system via a two-way valve, and is used to provide the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system with a preset temperature of cooling medium. The control system is used to acquire the driving status of the middle axle electric drive axle and the rear axle electric drive axle, as well as the temperature detected by the temperature detection element, and, based on the driving status and the temperature, control the flow control valve to enable the cooling circuit between the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system for thermal management, or control the two-way valve to enable the cooling circuit between the vehicle thermal management system and the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system for thermal management.

2. The dual-drive bridge thermal management system according to claim 1, characterized in that, The middle axle electric drive bridge and the rear axle electric drive bridge are configured in parallel and are each equipped with a drive motor; Both the middle axle electric drive bridge thermal management system and the rear axle electric drive bridge thermal management system are equipped with heat exchangers to cool the middle axle electric drive bridge and the rear axle electric drive bridge using cooling media.

3. The dual-drive bridge thermal management system according to claim 1, characterized in that, A control system is configured to acquire the drive status of the middle axle electric drive bridge and the rear axle electric drive bridge, as well as the temperature detected by a temperature sensing element, and, based on the drive status and the temperature, control the flow control valve to enable interconnection of the cooling circuits between the thermal management systems of the middle axle electric drive bridge and the rear axle electric drive bridge for thermal management, including: When at least one of the middle axle electric drive axle or the rear axle electric drive axle is not in operation, the flow control valve is controlled to make the cooling circuit between the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system interconnected for thermal management, and the two-way valve is controlled to make the cooling circuit between the vehicle thermal management system and the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system disconnected. The output flow rate of the flow control valve is controlled based on the temperature detected by the temperature sensing element.

4. The dual-drive bridge thermal management system according to claim 3, characterized in that, The relationship between the flow rate of the cooling medium in the thermal management systems of the middle and rear axles electric drive bridges and the detected value of the temperature sensing element is: Q1:Q2=t1:t2; In the formula, Q1 and Q2 represent the flow rates of the cooling medium to the thermal management systems of the middle and rear axles electric drive bridges, respectively, and t1 and t2 represent the temperature detection values ​​of the temperature sensing elements of the middle and rear axles, respectively.

5. The dual-drive bridge thermal management system according to claim 1, characterized in that, A control system is configured to acquire the drive status of the middle axle electric drive bridge and the rear axle electric drive bridge, as well as the temperature detected by a temperature sensing element, and, based on the drive status and the temperature, control the two-way valve to connect the cooling circuit between the dual electric drive bridge thermal management system and the thermal management systems of the middle axle electric drive bridge and the rear axle electric drive bridge for thermal management, including: When both the middle axle electric drive axle and the rear axle electric drive axle are in driving state, the two-way valve is controlled to connect the cooling circuit between the vehicle thermal management system and the thermal management systems of the middle axle electric drive axle and the rear axle electric drive axle for thermal management. The output flow rate of the water pump in the cooling circuit is controlled based on the temperature detected by the temperature sensing element.

6. The dual-drive bridge thermal management system according to claim 5, characterized in that, The relationship between the water pump's output flow rate, the two-way valve's connection status, and the temperature value detected by the temperature sensing element is as follows: In the formula, Q represents the output flow rate of the water pump. max t1 represents the maximum output flow rate of the water pump, t2 represents the temperature value of the middle bridge electric drive bridge detected by the temperature sensing element, and t3 represents the temperature value of the rear bridge electric drive bridge detected by the temperature sensing element. max This indicates the temperature reference value.

7. A method for thermal management of a dual electric drive bridge applied to the thermal management system of any one of claims 1-6, characterized in that, include: Acquire the drive status information of the dual electric drive bridge and the temperature information of the dual electric drive bridge detected by the temperature sensing element; Adjust the connection status of the two-way valve and the flow control valve according to the drive status information of the dual electric drive axle to determine whether to conduct the cooling circuit between the vehicle thermal management system and the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system for thermal management, or whether to conduct the cooling circuit between the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system for thermal management. Based on the temperature information of the dual electric drive bridge detected by the temperature sensing element, the flow rate of the flow control valve or the output flow rate of the water pump in the cooling circuit is controlled.

8. The thermal management method for a dual-drive electric bridge according to claim 7, characterized in that, Adjusting the connection status of the two-way valve and flow control valve based on the drive status information of the dual electric drive axle, to determine whether to conduct the cooling circuit between the vehicle thermal management system and the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system for thermal management, or whether to conduct the cooling circuit between the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system for thermal management, including: When at least one of the middle axle electric drive axle or the rear axle electric drive axle is not in operation, the flow control valve is controlled to make the cooling circuit between the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system interconnected for thermal management, and the two-way valve is controlled to make the cooling circuit between the vehicle thermal management system and the middle axle electric drive axle thermal management system and the rear axle electric drive axle thermal management system disconnected. When both the middle axle electric drive axle and the rear axle electric drive axle are in driving mode, the two-way valve is controlled to connect the cooling circuit between the vehicle thermal management system and the thermal management systems of the middle axle electric drive axle and the rear axle electric drive axle for thermal management.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the dual electric drive bridge thermal management method as described in claim 7 or 8.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the dual electric drive bridge thermal management method as described in claim 7 or 8.

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