Post-operation method and device for water loop of thermal management system and thermal management control module

Abstract

The embodiment of the invention provides a post-operation method and device of a water loop of a thermal management system and a thermal management control module. The method comprises the steps that when an ignition switch power source is powered on, a whole vehicle is powered on with high voltage, first set time is delayed, and an initial state enters a preparation state; when the ignition switch power supply is powered off, the whole vehicle is in high voltage and delays a second set time, and the preparation state enters a pre-operation state; when the acquired temperature of the target object is greater than or equal to a set temperature threshold value and a third set time is delayed, entering a post-operation state from a pre-operation state; in the post-operation state, the post-operation duty ratio of each cooling assembly is determined according to the duty ratio when each cooling assembly of the water loop of the thermal management system enters the post-operation state; the post-operation time of the cooling assembly is determined according to the multiple target object temperatures; and post-operation control is carried out on each cooling assembly according to the post-operation duty ratio and the post-operation time of each cooling assembly, and the heat dissipation capacity and safety of the electric vehicle after power-off are improved.

Description

Technical Field

[0001] This invention relates to the field of thermal management technology, and in particular to a post-operation method, apparatus, and thermal management control module for a thermal management system water circuit. Background Technology

[0002] As the penetration rate of electric vehicles gradually increases, the new energy vehicle industry has entered a stage of vigorous development. The market's requirements for the comprehensive performance of vehicles (especially the safety and durability of key components) are also continuously increasing, making the thermal management system one of the core supporting modules. However, traditional automotive thermal management systems have obvious limitations in terms of application scenarios. Their design focuses mainly on the normal operation phase after the vehicle is powered on, and they pay insufficient attention to the need for residual heat management after power-off, resulting in significant technical shortcomings in the operation control logic after power-off.

[0003] This shortcoming directly affects the safety and performance of key components such as batteries and motors: if the system lacks an effective mechanism for dissipating and managing residual heat after power is off, the temperature of the components will remain high due to the continuous accumulation of residual heat, which will not only accelerate the aging of the components and shorten their service life, but may also cause safety hazards such as thermal runaway. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a post-operation method, apparatus and thermal management control module for a thermal management system water circuit, in order to improve the heat dissipation capacity of an electric vehicle after power-off, thereby improving the service life of components and enhancing the safety of the electric vehicle.

[0005] On one hand, embodiments of the present invention provide a post-operation method for a water circuit in a thermal management system, comprising: When the ignition switch power supply is turned on, the vehicle is connected to high voltage and a first set time is delayed, it enters the preparation state from the initialization state. When the ignition switch power is turned off, the vehicle is de-energized and delayed for a second set time, it enters the pre-operation state from the preparation state. When the temperature of the target object is greater than or equal to the set temperature threshold and a third set time is delayed, the system enters the post-running state from the pre-running state. In the post-operation state, the post-operation duty cycle of each cooling component is determined based on the duty cycle of each cooling component in the water circuit of the thermal management system when it enters the post-operation state. The subsequent operating time of the cooling component is determined based on the temperatures of the multiple target objects. Post-run control is performed on each cooling component based on its post-run duty cycle and post-run time.

[0006] Optionally, determining the subsequent operating duty cycle of each cooling component based on its duty cycle when it enters the subsequent operating state in the water circuit of the thermal management system includes: The duty cycle of each cooling component in the water circuit of the thermal management system when it enters the later operating state is taken as the smaller value of the set duty cycle to determine the later operating duty cycle of each cooling component. The cooling components include: electric fans, electric water pumps, or battery-powered water pumps.

[0007] Optionally, the target object temperature includes: motor temperature, power component temperature, or maximum battery temperature, wherein the power component temperature includes motor controller temperature, and determining the subsequent operating time of the cooling component based on multiple target object temperatures includes: Based on the obtained correspondence between the motor temperature, the motor controller temperature, the battery maximum temperature and the subsequent running time, the first subsequent running time corresponding to the motor temperature, the second subsequent running time corresponding to the motor controller temperature and the third subsequent running time corresponding to the battery maximum temperature are queried. The maximum value of the first, second, and third post-run times is taken to generate the post-run time of the cooling component.

[0008] Optionally, after the acquired target object temperature is greater than or equal to a set temperature threshold and a third set time is delayed, the process of transitioning from the pre-running state to the post-running state includes: When the ignition switch power is turned off, the vehicle is de-energized and delayed for a fourth set time, it enters the preparation state from the post-operation state.

[0009] Optionally, after the acquired target object temperature is greater than or equal to a set temperature threshold and a third set time is delayed, and the process transitions from the pre-running state to the post-running state, the method further includes: When the ignition switch power is turned off, and the temperatures of multiple target objects are all less than the set temperature threshold or remain below the fifth set time, the system will enter the off state from the later operating state.

[0010] Optionally, after the ignition switch power supply is turned off, the vehicle voltage is reduced, and a second set time is delayed, the process of transitioning from the preparation state to the pre-operation state includes: When the ignition switch power supply is turned on, the vehicle is connected to high voltage and delayed for a sixth set time, it enters the preparation state from the pre-operation state.

[0011] Optionally, after the ignition switch power supply is turned off, the vehicle voltage is reduced, and a second set time is delayed, the process of transitioning from the preparation state to the pre-operation state includes: When the ignition switch power is turned off, and the temperatures of multiple target objects are all less than the set temperature threshold, and a seventh set time is delayed, the system enters the off state from the pre-operation state.

[0012] On the other hand, embodiments of the present invention provide a post-operation device for a water circuit in a thermal management system, comprising: The first state transition module is used to transition from the initialization state to the preparation state when the ignition switch power supply is powered on, the vehicle is connected to high voltage and a first set time is delayed. The second state transition module is used to transition from the preparation state to the pre-operation state when the ignition switch power is turned off, the vehicle voltage is reduced, and a second set time is delayed. The third state transition module is used to transition from the pre-running state to the post-running state when the acquired target object temperature is greater than or equal to a set temperature threshold and after a third set time delay. The first determining module is used to determine the post-operation duty cycle of each cooling component in the post-operation state based on the duty cycle of each cooling component in the water circuit of the thermal management system when it enters the post-operation state. The second determining module is used to determine the subsequent running time of the cooling component based on the temperatures of the multiple target objects; The post-run control module is used to perform post-run control on each cooling component based on the post-run duty cycle and the post-run time of each cooling component.

[0013] On the other hand, embodiments of the present invention provide a storage medium including a stored program, wherein, when the program is running, it controls the device where the storage medium is located to execute the post-operation method of the water circuit of the thermal management system described above.

[0014] On the other hand, embodiments of the present invention provide a thermal management control module, including a memory and a processor. The memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions. When the program instructions are loaded and executed by the processor, the steps of the post-operation method of the water circuit of the thermal management system described above are implemented.

[0015] In the technical solution provided by this invention, when the ignition switch power supply is powered on, the vehicle is subjected to high voltage and delayed for a first set time, it enters the preparation state from the initialization state; when the ignition switch power supply is powered off, the vehicle is subjected to high voltage and delayed for a second set time, it enters the pre-operation state from the preparation state; when the acquired target object temperature is greater than or equal to a set temperature threshold and delayed for a third set time, it enters the post-operation state from the pre-operation state; in the post-operation state, the post-operation duty cycle of each cooling component is determined according to the duty cycle of each cooling component in the thermal management system water circuit when it enters the post-operation state; the post-operation time of the cooling component is determined according to the temperatures of multiple target objects; and post-operation control is performed on each cooling component according to the post-operation duty cycle and post-operation time of each cooling component, thereby improving the heat dissipation capacity of the electric vehicle after power-off, thus improving the service life of components and the safety of the electric vehicle. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A flowchart illustrating a post-operation method for a water circuit in a thermal management system, as provided in an embodiment of the present invention; Figure 2 A schematic diagram of a thermal management system provided in an embodiment of the present invention; Figure 3 A flowchart illustrating another post-operation method for a water circuit in a thermal management system provided in an embodiment of the present invention; Figure 4 A schematic diagram of a post-operation device for a water circuit in a thermal management system according to an embodiment of the present invention; Figure 5 This is a schematic diagram of a thermal management control module provided in an embodiment of the present invention. Detailed Implementation

[0018] To better understand the technical solution of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0021] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0022] To effectively reduce the performance degradation and safety risks of electric vehicles caused by residual heat accumulation after power-off, this invention specifically strengthens the real-time monitoring and dynamic management of various heat source components (target objects) after power-off, solving the problem of residual heat disposal at its source. Therefore, one embodiment of this invention provides a post-operation method for the water circuit of a thermal management system. Figure 1 A flowchart illustrating a post-operation method for a water loop in a thermal management system, as provided in an embodiment of the present invention, is shown below. Figure 1 As shown, the method includes: Step 102: When the ignition switch power supply (KL15) is powered on, the vehicle is connected to high voltage and delayed for the first set time, it enters the ready state from the initialization state (Init).

[0023] In this embodiment of the invention, a first set time can be set according to the actual situation, for example, the first set time is 0.5 seconds.

[0024] Step 104: When the ignition switch power is turned off, the vehicle is de-energized and delayed for the second set time, the vehicle enters the PostRun state from the ready state.

[0025] In this embodiment of the invention, a second preset time can be set according to the actual situation, for example, the second preset time is 0.1 seconds.

[0026] Step 106: When the temperature of the target object is greater than or equal to the set temperature threshold and a third set time is delayed, the system enters the post-running state from the pre-running state.

[0027] In this embodiment of the invention, the target object temperature includes: motor temperature, power component temperature, or battery maximum temperature, and the power component temperature includes the motor controller temperature.

[0028] In this embodiment of the invention, when the motor temperature is greater than or equal to a first set temperature threshold (e.g., 120°C), the motor controller temperature is greater than or equal to a second set temperature threshold (e.g., 80°C), or the battery maximum temperature is greater than or equal to a third set temperature threshold (e.g., 40°C), and a third set time (e.g., 0.1 seconds) is delayed, the system transitions from the pre-run state to the after-run state.

[0029] Figure 2 A schematic diagram of a thermal management system provided in an embodiment of the present invention is shown below. Figure 2As shown, the blue line represents the refrigerant circuit, and the yellow line represents the water circuit. In the refrigerant circuit, the water-cooled evaporator is connected to the gas-liquid separator. The gas-liquid separator is connected to the compressor, heating valve, and indoor evaporator of the Heating, Ventilation, and Air Conditioning (HVAC) module. The compressor is connected to the indoor condenser of the HVAC module. The indoor condenser is connected to the dehumidifier valve and the large-diameter electronic expansion valve (EXV). The large-diameter EXV is connected to the outdoor heat exchanger. The outdoor heat exchanger is connected to the heating valve and the check valve. The check valve is connected to the evaporator EXV. The dehumidifier valve is connected to the evaporator EXV. The evaporator EXV is connected to the indoor evaporator. The check valve is connected to the battery EXV. The battery EXV is connected to the water-cooled evaporator.

[0030] In the water circuit, the water-cooled evaporator is connected to the replenishing reservoir via a multi-way valve. The replenishing reservoir is connected to the on-board charger (OBC), DC-to-DC converter (DCDC), and motor control unit (MCU). The OBC, DCDC, and MCU are connected to the oil cooler, which exchanges heat with the motor. The oil cooler is connected to the electric water pump, which is connected to the low-temperature radiator. The low-temperature radiator is connected to the water-cooled evaporator and the replenishing reservoir via a multi-way valve. The electric water pump is also connected to the water-cooled evaporator via a multi-way valve and to the replenishing reservoir via a multi-way valve. The water-cooled evaporator is connected to the water PTC (Power Transmitter), which is connected to the battery. The battery is connected to the battery water pump, which is connected to the water-cooled evaporator via multi-way valve 3-1. The water-cooled evaporator is connected to a water-based positive temperature coefficient (PTC), the PTC is connected to a battery, the battery is connected to a battery-powered water pump, and the battery-powered water pump is connected to a replenishment reservoir via a multi-way valve. Figure 2 The circular components (PT-e, PT-b, Ta, Tb, T-p2, Tc, PT-d, Te, T-B1, T-B2) are sensors; PT-e, PT-b, and PT-d are temperature and pressure sensors; and Ta, Tb, T-p2, Tc, Te, T-B1, and T-B2 are temperature sensors.

[0031] Step 108: In the post-operation state, determine the post-operation duty cycle of each cooling component based on the duty cycle of each cooling component in the water circuit of the thermal management system when it enters the post-operation state.

[0032] In this embodiment of the invention, the multi-way valve maintains its current mode and takes the smaller value between the duty cycle of each cooling component in the water circuit of the thermal management system when it enters the later operating state and the set duty cycle, so as to determine the later operating duty cycle of each cooling component. The cooling components include: electric fan, electric water pump or battery water pump.

[0033] In this embodiment of the invention, the duty cycle can be set according to the actual situation. In order to ensure that the coolant flow rate in the water circuit is uniform and to give full play to the coordinated control, the duty cycle can be set to 50%.

[0034] For example, the duty cycle of the electric fan in the later running state is min (the duty cycle of the electric fan when it enters the later running state, set duty cycle), the duty cycle of the electric water pump in the later running state is min (the duty cycle of the electric water pump when it enters the later running state, set duty cycle), and the duty cycle of the battery water pump in the later running state is min (the duty cycle of the battery water pump when it enters the later running state, set duty cycle).

[0035] Step 110: Determine the subsequent running time of the cooling components based on the temperatures of multiple target objects.

[0036] In this embodiment of the invention, based on the obtained correspondence between the motor temperature, motor controller temperature, and battery maximum temperature and the subsequent running time (Table 1 shows the subsequent running time schedule), the first subsequent running time corresponding to the motor temperature, the second subsequent running time corresponding to the motor controller temperature, and the third subsequent running time corresponding to the battery maximum temperature are retrieved. The largest value of the first, second, and third subsequent running times is taken to generate the subsequent running time of the cooling component.

[0037] Table 1

[0038] For example, when the motor temperature is 120℃ <= 140℃, the motor requires an AfterRun time of 30 seconds, but when the battery temperature is 42℃, the battery requires an AfterRun time of 60 seconds. In this case, the larger of 30 seconds and 60 seconds is taken as the AfterRun time of 60 seconds.

[0039] Step 112: Perform post-run control on each cooling component based on its post-run duty cycle and post-run time.

[0040] For example, if the after-run duty cycle of the electric fan is 20%, the after-run duty cycle of the electric water pump is 30%, the after-run duty cycle of the battery water pump is 50%, and the after-run time is 60 seconds, then the after-run control of the electric fan, electric water pump, and battery water pump is performed based on the after-run duty cycle of the electric fan (20%), the after-run duty cycle of the electric water pump (30%), the after-run duty cycle of the battery water pump (50%), and the after-run time (60 seconds).

[0041] In the technical solution provided by this invention, when the ignition switch power supply is powered on, the vehicle is subjected to high voltage and delayed for a first set time, it enters the preparation state from the initialization state; when the ignition switch power supply is powered off, the vehicle is subjected to high voltage and delayed for a second set time, it enters the pre-operation state from the preparation state; when the acquired target object temperature is greater than or equal to a set temperature threshold and delayed for a third set time, it enters the post-operation state from the pre-operation state; in the post-operation state, the post-operation duty cycle of each cooling component is determined according to the duty cycle of each cooling component in the thermal management system water circuit when it enters the post-operation state; the post-operation time of the cooling component is determined according to the temperatures of multiple target objects; and post-operation control is performed on each cooling component according to the post-operation duty cycle and post-operation time of each cooling component, thereby improving the heat dissipation capacity of the electric vehicle after power-off, thus improving the service life of components and the safety of the electric vehicle.

[0042] One embodiment of the present invention provides another post-operation method for the water loop of a thermal management system. Figure 3 A flowchart of another post-operation method for a water loop in a thermal management system provided in an embodiment of the present invention is shown below. Figure 3 As shown, the method includes: Step 202: When the ignition switch power supply is turned on, the vehicle is connected to high voltage and a first set time is delayed, the vehicle enters the preparation state from the initialization state.

[0043] In this embodiment of the invention, a first set time can be set according to the actual situation, for example, the first set time is 0.5 seconds.

[0044] Step 204: When the ignition switch power is turned off, the vehicle is de-energized and delayed for the second set time, the vehicle enters the pre-loaded and then running state from the ready state, and executes steps 206, 212 or 214.

[0045] In this embodiment of the invention, a second preset time can be set according to the actual situation, for example, the second preset time is 0.1 seconds.

[0046] Step 206: When the temperature of the target object is greater than or equal to the set temperature threshold and a third set time is delayed, the system enters the post-running state from the pre-running state and executes step 208 or 210.

[0047] In this embodiment of the invention, the target object temperature includes: motor temperature, power component temperature, or battery maximum temperature, and the power component temperature includes the motor controller temperature.

[0048] In this embodiment of the invention, when the motor temperature is greater than or equal to a first set temperature threshold (e.g., 120°C), the motor controller temperature is greater than or equal to a second set temperature threshold (e.g., 80°C), or the battery maximum temperature is greater than or equal to a third set temperature threshold (e.g., 40°C), and a third set time (e.g., 0.1 seconds) is delayed, the system transitions from the pre-run state to the after-run state.

[0049] Step 208: When the ignition switch power is turned off, the vehicle is de-energized and delayed for the fourth set time, it enters the preparation state from the rear running state and executes step 204.

[0050] Step 210: When the ignition switch power is turned off, and the temperatures of multiple target objects are all lower than the set temperature threshold or remain below the fifth set time, the process ends and the device transitions from the running state to the off state.

[0051] In this embodiment of the invention, when the ignition switch power is turned off and the motor temperature is less than the first set temperature threshold (e.g., 120°C), or the motor controller temperature is less than the second set temperature threshold (e.g., 80°C), and the battery maximum temperature is less than the third set temperature threshold (e.g., 40°C), or remains below the fifth set time (e.g., 120 seconds), the device enters the off state from the re-running state.

[0052] Step 212: When the ignition switch power supply is turned on, the vehicle is connected to high voltage and delayed for the sixth set time, it enters the preparation state from the front-end running state and executes step 204.

[0053] In this embodiment of the invention, a sixth preset time can be set according to the actual situation, for example, the sixth preset time is 0.1 seconds.

[0054] Step 214: When the ignition switch power is turned off, the temperatures of multiple target objects are all less than the set temperature threshold, and a seventh set time is delayed, the process ends after the pre-running state transitions to the off state.

[0055] In this embodiment of the invention, when the ignition switch power is turned off and the motor temperature is less than the first set temperature threshold (e.g., 120°C) or the motor controller temperature is less than the second set temperature threshold (e.g., 80°C) and the battery maximum temperature is less than the third set temperature threshold (e.g., 40°C), and a seventh set time (e.g., 5 seconds) is delayed, the device transitions from the pre-operated state to the off state.

[0056] In the technical solution provided by this invention, when the ignition switch power supply is powered on, the vehicle is subjected to high voltage and delayed for a first set time, it enters the preparation state from the initialization state; when the ignition switch power supply is powered off, the vehicle is subjected to high voltage and delayed for a second set time, it enters the pre-operation state from the preparation state; when the acquired target object temperature is greater than or equal to a set temperature threshold and delayed for a third set time, it enters the post-operation state from the pre-operation state; in the post-operation state, the post-operation duty cycle of each cooling component is determined according to the duty cycle of each cooling component in the thermal management system water circuit when it enters the post-operation state; the post-operation time of the cooling component is determined according to the temperatures of multiple target objects; and post-operation control is performed on each cooling component according to the post-operation duty cycle and post-operation time of each cooling component, thereby improving the heat dissipation capacity of the electric vehicle after power-off, thus improving the service life of components and the safety of the electric vehicle.

[0057] An embodiment of the present invention provides a post-operation device for the water circuit of a thermal management system. Figure 4 This is a schematic diagram of a post-operation device for a water circuit in a thermal management system according to an embodiment of the present invention, as shown below. Figure 4 As shown, the device includes: a first state transition module 41, a second state transition module 42, a third state transition module 43, a first determination module 44, a second determination module 45, and a post-run control module 46.

[0058] The first state transition module 41 is used to transition from the initialization state to the preparation state when the ignition switch power supply is powered on, the vehicle is connected to high voltage, and a first set time is delayed.

[0059] The second state transition module 42 is used to transition from the preparation state to the pre-operation state when the ignition switch power supply is turned off, the vehicle voltage is reduced, and a second set time is delayed.

[0060] The third state transition module 43 is used to transition from the pre-running state to the post-running state when the acquired target object temperature is greater than or equal to a set temperature threshold and after a third set time delay.

[0061] The first determining module 44 is used to determine the post-operation duty cycle of each cooling component in the post-operation state based on the duty cycle of each cooling component in the water circuit of the thermal management system when it enters the post-operation state.

[0062] The second determining module 45 is used to determine the subsequent running time of the cooling component based on the temperatures of the multiple target objects.

[0063] The post-run control module 46 is used to perform post-run control on each cooling component based on the post-run duty cycle and the post-run time of each cooling component.

[0064] In this embodiment of the invention, the first determining module 44 is specifically used to take the smaller value between the duty cycle of each cooling component in the water circuit of the thermal management system when it enters the post-operation state and the set duty cycle, so as to determine the post-operation duty cycle of each cooling component; wherein, the cooling component includes: an electric fan, an electric water pump or a battery water pump.

[0065] In this embodiment of the invention, the target object temperature includes: motor temperature, power component temperature, or battery maximum temperature. The power component temperature includes the motor controller temperature. The second determining module 45 is specifically used to query the first subsequent running time corresponding to the motor temperature, the second subsequent running time corresponding to the motor controller temperature, and the third subsequent running time corresponding to the battery maximum temperature based on the obtained correspondence between the motor temperature, the motor controller temperature, and the battery maximum temperature and the subsequent running time; and to generate the subsequent running time of the cooling component by taking the largest value of the first subsequent running time, the second subsequent running time, and the third subsequent running time.

[0066] In this embodiment of the invention, the device further includes a fourth state transition module 47.

[0067] The fourth state transition module 47 is used to transition from the post-operation state to the preparation state when the ignition switch power supply is turned off, the vehicle voltage is reduced, and a fourth set time is delayed.

[0068] In this embodiment of the invention, the device further includes a fifth state transition module 48.

[0069] The fifth state transition module 48 is used to enter the off state from the following running state when the ignition switch power is turned off, or when the temperatures of multiple target objects are all less than the set temperature threshold or remain below the fifth set time.

[0070] In this embodiment of the invention, the device further includes a sixth state transition module 49.

[0071] The sixth state transition module 49 is used to transition from the pre-operation state to the preparation state when the ignition switch power supply is powered on, the vehicle is connected to high voltage, and a sixth set time is delayed.

[0072] In this embodiment of the invention, the device further includes:

[0073] The seventh state transition module 50 is used to enter the off state from the pre-running state when the ignition switch power is turned off, the temperatures of multiple target objects are all less than the set temperature threshold, and a seventh set time is delayed.

[0074] In the technical solution provided by this invention, when the ignition switch power supply is powered on, the vehicle is subjected to high voltage and delayed for a first set time, it enters the preparation state from the initialization state; when the ignition switch power supply is powered off, the vehicle is subjected to high voltage and delayed for a second set time, it enters the pre-operation state from the preparation state; when the acquired target object temperature is greater than or equal to a set temperature threshold and delayed for a third set time, it enters the post-operation state from the pre-operation state; in the post-operation state, the post-operation duty cycle of each cooling component is determined according to the duty cycle of each cooling component in the thermal management system water circuit when it enters the post-operation state; the post-operation time of the cooling component is determined according to the temperatures of multiple target objects; and post-operation control is performed on each cooling component according to the post-operation duty cycle and post-operation time of each cooling component, thereby improving the heat dissipation capacity of the electric vehicle after power-off, thus improving the service life of components and the safety of the electric vehicle.

[0075] The post-operation device for the water circuit of the thermal management system provided in this embodiment of the invention can be used to achieve the above. Figure 1 or Figure 3 The post-operation method of the water circuit of the thermal management system is described in detail in the above-mentioned embodiment of the post-operation method of the water circuit of the thermal management system, and will not be repeated here.

[0076] This invention provides a storage medium that includes a stored program. When the program runs, it controls the device where the storage medium is located to execute the steps of the embodiment of the post-operation method of the water circuit of the thermal management system described above. For a detailed description, please refer to the embodiment of the post-operation method of the water circuit of the thermal management system described above.

[0077] This invention provides a thermal management control module, including a memory and a processor. The memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions. When the program instructions are loaded and executed by the processor, they implement the steps of the above-described embodiment of the post-operation method of the thermal management system water loop. For a detailed description, please refer to the above-described embodiment of the post-operation method of the thermal management system water loop.

[0078] Figure 5 This is a schematic diagram of a thermal management control module provided in an embodiment of the present invention. Figure 5 As shown, the thermal management control module 20 of this embodiment includes a processor 21, a memory 22, and a computer program 23 stored in the memory 22 and executable on the processor 21. When the processor 21 executes the computer program 23, it implements the post-operation method applied to the water loop of the thermal management system in this embodiment. To avoid repetition, it will not be described in detail here. Alternatively, when the processor 21 executes the computer program, it implements the functions of each model / unit in the post-operation device applied to the water loop of the thermal management system in this embodiment. To avoid repetition, it will not be described in detail here.

[0079] The thermal management control module 20 includes, but is not limited to, a processor 21 and a memory 22. Those skilled in the art will understand that... Figure 5 This is merely an example of the thermal management control module 20 and does not constitute a limitation on the thermal management control module 20. It may include more or fewer components than shown, or combine certain components, or different components. For example, the thermal management control module may also include input / output devices, network access devices, buses, etc.

[0080] The processor 21 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0081] The memory 22 can be an internal storage unit of the thermal management control module 20, such as a hard disk or RAM of the thermal management control module 20. The memory 22 can also be an external storage device of the thermal management control module 20, such as a plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the thermal management control module 20. Furthermore, the memory 22 can include both internal storage units and external storage devices of the thermal management control module 20. The memory 22 is used to store computer programs and other programs and data required by the thermal management control module. The memory 22 can also be used to temporarily store data that has been output or will be output.

[0082] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0083] In the several embodiments provided by this invention, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between devices or units through some interfaces, and may be electrical, mechanical, or other forms.

[0084] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0085] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0086] The integrated units implemented as software functional units described above can be stored in a computer-readable storage medium. These software functional units, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A post-operation method for a water circuit in a thermal management system, characterized in that, include: When the ignition switch power supply is turned on, the vehicle is connected to high voltage and a first set time is delayed, it enters the preparation state from the initialization state. When the ignition switch power is turned off, the vehicle is de-energized and delayed for a second set time, it enters the pre-operation state from the preparation state. When the temperature of the target object is greater than or equal to the set temperature threshold and a third set time is delayed, the system enters the post-running state from the pre-running state. In the post-operation state, the post-operation duty cycle of each cooling component is determined based on the duty cycle of each cooling component in the water circuit of the thermal management system when it enters the post-operation state. The subsequent operating time of the cooling component is determined based on the temperatures of the multiple target objects. Post-run control is performed on each cooling component based on its post-run duty cycle and post-run time.

2. The method according to claim 1, characterized in that, The determination of the subsequent operating duty cycle of each cooling component based on the duty cycle of each cooling component in the water circuit of the thermal management system when it enters the subsequent operating state includes: The duty cycle of each cooling component in the water circuit of the thermal management system when it enters the later operating state is taken as the smaller value of the set duty cycle to determine the later operating duty cycle of each cooling component. The cooling components include: electric fans, electric water pumps, or battery-powered water pumps.

3. The method according to claim 1, characterized in that, The target object temperature includes: motor temperature, power component temperature, or battery maximum temperature, wherein the power component temperature includes motor controller temperature. Determining the subsequent operating time of the cooling component based on multiple target object temperatures includes: Based on the obtained correspondence between the motor temperature, the motor controller temperature, the battery maximum temperature and the subsequent running time, the first subsequent running time corresponding to the motor temperature, the second subsequent running time corresponding to the motor controller temperature and the third subsequent running time corresponding to the battery maximum temperature are queried. The maximum value of the first, second, and third post-run times is taken to generate the post-run time of the cooling component.

4. The method according to claim 1, characterized in that, When the acquired target object temperature is greater than or equal to a set temperature threshold and a third set time is delayed, after transitioning from the pre-running state to the post-running state, the process includes: When the ignition switch power is turned off, the vehicle is de-energized and delayed for a fourth set time, it enters the preparation state from the post-operation state.

5. The method according to claim 1, characterized in that, After the acquired target object temperature is greater than or equal to a set temperature threshold and a third set time is delayed, and the process transitions from the pre-running state to the post-running state, the process further includes: When the ignition switch power is turned off, and the temperatures of multiple target objects are all less than the set temperature threshold or remain below the fifth set time, the system will enter the off state from the later operating state.

6. The method according to claim 1, characterized in that, After the ignition switch power supply is turned off, the vehicle voltage is reduced, and a second set time is delayed, the process transitions from the preparation state to the pre-operation state, including: When the ignition switch power supply is turned on, the vehicle is connected to high voltage and delayed for a sixth set time, it enters the preparation state from the pre-operation state.

7. The method according to claim 1, characterized in that, After the ignition switch power supply is turned off, the vehicle voltage is reduced, and a second set time is delayed, the process transitions from the preparation state to the pre-operation state, including: When the ignition switch power is turned off, and the temperatures of multiple target objects are all less than the set temperature threshold, and a seventh set time is delayed, the system enters the off state from the pre-operation state.

8. A post-operation device for a water circuit in a thermal management system, characterized in that, include: The first state transition module is used to transition from the initialization state to the preparation state when the ignition switch power supply is powered on, the vehicle is connected to high voltage and a first set time is delayed. The second state transition module is used to transition from the preparation state to the pre-operation state when the ignition switch power is turned off, the vehicle voltage is reduced, and a second set time is delayed. The third state transition module is used to transition from the pre-running state to the post-running state when the acquired target object temperature is greater than or equal to a set temperature threshold and after a third set time delay. The first determining module is used to determine the post-operation duty cycle of each cooling component in the post-operation state based on the duty cycle of each cooling component in the water circuit of the thermal management system when it enters the post-operation state. The second determining module is used to determine the subsequent running time of the cooling component based on the temperatures of the multiple target objects; The post-run control module is used to perform post-run control on each cooling component based on the post-run duty cycle and the post-run time of each cooling component.

9. A storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the storage medium to perform the post-operation method of the water circuit of the thermal management system according to any one of claims 1 to 7.

10. A thermal management control module, comprising a memory and a processor, wherein the memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions, characterized in that, When the program instructions are loaded and executed by the processor, they implement the steps of the post-operation method of the water circuit of the thermal management system as described in any one of claims 1 to 7.

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