A hybrid vehicle thermal management optimization method and system

Abstract

The present invention discloses a hybrid vehicle thermal management optimization method and system. By calculating the electronic fan duty cycle and combining it with the requested values ​​of the engine circuit and the motor circuit duty cycles, the electronic fan control is jointly controlled with the engine water pump and the motor water pump. One electronic fan can simultaneously cool the water temperature of the engine thermal management circuit and the motor thermal management circuit, maximize the heat dissipation function of the parts, reduce costs, improve cooling efficiency, and reduce energy consumption. While ensuring the cooling effect, energy saving and consumption reduction are achieved, and the utilization rate of the engine's waste heat is improved. When the engine is stopped, the waste heat from the engine operation can be used as a heat source for the passenger compartment by controlling the operation of the engine water pump.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile thermal management, and in particular to a hybrid electric vehicle thermal management optimization method and system. Background Art

[0002] Currently, thermal management in hybrid vehicles primarily relies on designing separate cooling circuits for various heat-generating components and individually controlling the cooling accessories within each circuit, such as the water pump, fan, and condenser, to achieve cooling. High- and low-temperature circuits typically operate independently, but the separate control of each cooling circuit inevitably leads to cooling redundancy in the system, resulting in energy waste for the entire vehicle. Consequently, switches or valves are used to open up various channels to recycle excess heat or cooling. By controlling a three-way solenoid valve, hot water from the engine is circulated to the battery circuit to heat the battery. However, this approach increases vehicle design costs, increases system complexity, and reduces system stability.

[0003] Therefore, there is an urgent need for a thermal management method to solve the problem of independent operation of high-temperature and low-temperature circuits and low energy utilization. Summary of the Invention

[0004] In view of the above existing problems, the present invention is proposed.

[0005] Therefore, the present invention provides a hybrid vehicle thermal management optimization method and system to solve the problem that the high-temperature circuit and the low-temperature circuit of the hybrid vehicle thermal management control either operate independently, resulting in low energy utilization, or the thermal management system and method are complex in design and lack stability.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a hybrid electric vehicle thermal management optimization method, comprising:

[0008] Obtaining an electronic fan duty cycle request value, where the electronic fan duty cycle request value is calculated based on an engine circuit electronic fan duty cycle request value and a motor circuit electronic fan duty cycle request value;

[0009] Obtaining an engine water pump duty cycle request value, and performing a first control on the engine circuit based on the electronic fan duty cycle request value, the first control comprising calculating a ratio of the engine circuit electronic fan duty cycle request value to the motor circuit electronic fan duty cycle request value to obtain a first ratio, and making a judgment based on the first ratio to adjust the engine circuit water pump opening;

[0010] Obtain a motor water pump speed request value, and perform a second control on the engine circuit based on the electronic fan duty cycle request value. The second control includes calculating a ratio of the motor circuit electronic fan duty cycle request value to the engine circuit electronic fan duty cycle request value to obtain a second ratio, making a judgment based on the second ratio, and adjusting the water pump opening of the motor circuit.

[0011] As a preferred solution of the hybrid vehicle thermal management optimization method of the present invention, wherein: obtaining an electronic fan duty cycle request value, the electronic fan duty cycle request value is calculated by the engine circuit electronic fan duty cycle request value and the motor circuit electronic fan duty cycle request value, and further comprising,

[0012] Obtaining a vehicle speed factor based on the vehicle speed;

[0013] Obtain the air conditioning fan duty cycle request value based on battery cooling requirements, ambient temperature range, and vehicle speed range;

[0014] Comparing the engine circuit electronic fan duty cycle request value and the motor circuit electronic fan duty cycle request value, taking the larger request value and multiplying it by the vehicle speed factor to obtain a first request value;

[0015] The first request value is compared with the air conditioner fan duty cycle request value, and the larger value is the final electronic fan duty cycle request value.

[0016] As a preferred solution of the hybrid vehicle thermal management optimization method of the present invention, obtaining the engine water pump duty cycle request value includes:

[0017] Calculating an initial value of the engine water pump speed request based on the engine speed and engine torque;

[0018] Obtaining a correction factor for the engine water pump speed request value based on engine water temperature and engine torque change values;

[0019] The product of the engine water pump speed request initial value, the engine water pump speed request value correction factor, and the first ratio is calculated to obtain the engine water pump duty cycle request value.

[0020] As a preferred solution of the hybrid vehicle thermal management optimization method of the present invention, wherein: judging based on the first ratio, adjusting the water pump opening of the engine circuit includes:

[0021] If the duty cycle requirement of the motor circuit electronic fan is higher than the duty cycle requirement of the engine circuit electronic fan, the engine water pump duty cycle request value is reduced according to the first ratio.

[0022] If the duty cycle requirement of the motor circuit electronic fan is lower than the duty cycle requirement of the engine circuit electronic fan, the water pump opening of the engine circuit is maintained.

[0023] As a preferred solution of the hybrid vehicle thermal management optimization method of the present invention, obtaining the motor water pump speed request value includes:

[0024] According to the temperature values ​​of each component in the motor circuit, the water pump speed request value of each component is calculated, and the maximum value is selected as the water pump speed request value;

[0025] The product value of the water pump speed request value and the second ratio is calculated to obtain a final motor water pump speed request value.

[0026] As a preferred solution of the hybrid vehicle thermal management optimization method of the present invention, wherein: judging based on the second ratio, adjusting the water pump opening of the motor circuit includes:

[0027] If the duty cycle requirement of the electronic fan of the engine circuit is higher than the duty cycle requirement of the electronic fan of the motor circuit, the motor water pump speed request value is reduced according to the second ratio.

[0028] If the electronic fan duty cycle requirement of the engine circuit is lower than the electronic fan duty cycle requirement of the motor circuit, the water pump opening of the motor circuit is maintained.

[0029] As a preferred solution of the hybrid vehicle thermal management optimization method of the present invention, it also includes battery circuit control, specifically including:

[0030] Obtain battery temperature and battery function requirements, and control the opening of the expansion valve;

[0031] When the battery needs to be cooled, the first expansion valve is opened to allow the cooling medium to pass through the battery cooler for cooling;

[0032] When there is no need to heat the battery, the first expansion valve is closed and the second expansion valve is opened, allowing the cooling medium to pass through the front evaporator to the passenger compartment for cooling;

[0033] It also includes obtaining a battery water pump opening request based on the battery water inlet temperature;

[0034] When the battery temperature is about to overheat, turn the battery water pump to the maximum;

[0035] If the battery is overheated when not charging, the battery water pump is controlled to open and run continuously.

[0036] In a second aspect, the present invention provides a system for optimizing thermal management of a hybrid electric vehicle, comprising:

[0037] An electronic fan duty cycle calculation module is used to obtain an electronic fan duty cycle request value, where the electronic fan duty cycle request value is calculated based on the engine circuit electronic fan duty cycle request value and the motor circuit electronic fan duty cycle request value;

[0038] a first control module, configured to obtain a requested duty cycle value of an engine water pump and perform a first control on an engine circuit based on the requested duty cycle value of the electronic fan, wherein the first control comprises calculating a ratio of the requested duty cycle value of the electronic fan of the engine circuit to the requested duty cycle value of the electronic fan of the motor circuit to obtain a first ratio, and making a judgment based on the first ratio to adjust an opening of the water pump of the engine circuit;

[0039] The second control module is used to obtain the motor water pump speed request value and perform a second control on the engine circuit based on the electronic fan duty cycle request value. The second control includes calculating the ratio of the motor circuit electronic fan duty cycle request value to the engine circuit electronic fan duty cycle request value to obtain a second ratio, making a judgment based on the second ratio, and adjusting the water pump opening of the motor circuit.

[0040] In a third aspect, the present invention provides a computing device, comprising:

[0041] memory and processor;

[0042] The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, the steps of the hybrid electric vehicle thermal management optimization method are implemented.

[0043] In a fourth aspect, the present invention provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps of the hybrid electric vehicle thermal management optimization method.

[0044] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention combines the calculation of the electronic fan duty cycle with the engine circuit and motor circuit duty cycle request values, and jointly controls the electronic fan control with the engine water pump and the motor water pump. One electronic fan can simultaneously cool the water temperature of the engine thermal management circuit and the motor thermal management circuit, maximize the heat dissipation function of the parts, reduce costs, improve cooling efficiency, and reduce energy consumption. While ensuring the cooling effect, it achieves the effect of energy saving and consumption reduction, and improves the utilization rate of the engine's waste heat; when the engine is stopped, the waste heat from the engine operation can be used as a heat source for the passenger compartment by controlling the operation of the engine water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0046] Figure 1This is a schematic diagram of the overall process of the hybrid vehicle thermal management optimization method according to the first embodiment of the present invention;

[0047] Figure 2 This is a flow chart of a hybrid vehicle thermal management optimization method according to a second embodiment of the present invention. DETAILED DESCRIPTION

[0048] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of the specific embodiments of the present invention is given in conjunction with the accompanying drawings. It is obvious that the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in this field without creative work should fall within the scope of protection of the present invention.

[0049] Example 1

[0050] Reference Figure 1 , as one embodiment of the present invention, provides a hybrid electric vehicle thermal management optimization method, comprising:

[0051] S1: Obtain the electronic fan duty cycle request value, which is calculated based on the engine circuit electronic fan duty cycle request value and the motor circuit electronic fan duty cycle request value;

[0052] It should be noted that in the present invention, the engine circuit cooling parts include an electronic fan, an electronic water pump, an engine water temperature sensor, a thermostat and a high-temperature radiator; the motor circuit cooling parts include a generator and drive motor circuit water temperature sensor, a generator and drive motor stator temperature sensor, a generator and drive motor IGBT temperature sensor, a motor controller temperature sensor, a charging and distribution internal temperature sensor, an electronic water pump and a low-temperature radiator.

[0053] Furthermore, obtaining the electronic fan duty cycle request value, the electronic fan duty cycle request value is calculated by the engine circuit electronic fan duty cycle request value and the motor circuit electronic fan duty cycle request value, and further includes,

[0054] Obtain vehicle speed factor C based on vehicle speed;

[0055] Obtain the air conditioning fan duty cycle request value D based on the battery cooling requirement, ambient temperature range, and vehicle speed range;

[0056] Compare the engine circuit electronic fan duty cycle request value A and the motor circuit electronic fan duty cycle request value B, take the larger request value, and multiply it by the vehicle speed factor C to obtain a first request value;

[0057] The first request value is compared with the air conditioner fan duty cycle request value D, and the larger value is the final electronic fan duty cycle request value.

[0058] It should be noted that the engine circuit electronic fan duty cycle request value A can be obtained by two-dimensional table lookup calculation through the engine water temperature and the engine water pump duty cycle request value; the motor circuit electronic fan duty cycle request value B can be obtained by two-dimensional table lookup calculation through the water temperature measured by the generator and drive motor circuit water temperature sensors and the motor circuit water pump duty cycle request value.

[0059] At the same time, the vehicle speed factor involved in this step can be used for convective wind at high vehicle speeds to cool the parts.

[0060] It should also be noted that if the system still detects overtemperature in the thermal management circuit components after the vehicle key is turned off, the cooling fan will be controlled to continue running for a period of time.

[0061] S2: Obtaining an engine water pump duty cycle request value, and performing a first control on the engine circuit based on the electronic fan duty cycle request value, the first control comprising calculating a ratio of the engine circuit electronic fan duty cycle request value to the motor circuit electronic fan duty cycle request value to obtain a first ratio, and making a judgment based on the first ratio to adjust the engine circuit water pump opening;

[0062] Furthermore, the engine water pump duty cycle request value is obtained, including:

[0063] Calculate the engine water pump speed request initial value b based on the engine speed and engine torque;

[0064] Obtaining a correction factor c for the engine water pump speed request value based on the engine water temperature and engine torque change values;

[0065] The product of the engine water pump speed request initial value b, the engine water pump speed request value correction factor c, and the first ratio is calculated to obtain the engine water pump duty cycle request value.

[0066] Furthermore, the water pump opening of the engine circuit is adjusted based on the first ratio, including:

[0067] If the duty cycle requirement of the motor circuit electronic fan is higher than the duty cycle requirement of the engine circuit electronic fan, the engine water pump duty cycle request value is reduced according to the first ratio.

[0068] If the duty cycle requirement of the motor circuit electronic fan is lower than the duty cycle requirement of the engine circuit electronic fan, the water pump opening of the engine circuit is maintained.

[0069] It should be noted that since the duty cycle request values ​​of the engine water pump and the motor water pump are included in the electronic fan duty cycle calculation, controlling the engine water pump with reference to the first ratio can maximize the utilization of the engine cooling circuit and reduce energy consumption.

[0070] It should also be noted that the above method is adaptable to different application scenarios of the engine circuit, for example:

[0071] To achieve rapid engine warm-up, the engine water pump start timing should be appropriately delayed according to the engine water temperature and can be later than the engine start timing;

[0072] At the same time, in order to avoid drastic changes in the engine water pump under severe engine operating conditions, which may lead to increased energy consumption, the engine water pump request value should be properly filtered.

[0073] Specifically, the filter wave algorithm looks up a table to obtain the speed change slope value according to the difference between the target speed of the water pump and the current speed of the water pump, that is, the larger the difference, the larger the slope.

[0074] To prevent the circuit from overheating due to untimely heat dissipation after the thermal management components are shut down, the operating time of the engine water pump should be extended when overtemperature of the cooling circuit parts is detected.

[0075] Based on the above-mentioned engine thermal management method, when there is a need for heating in the passenger compartment, the hot water after the engine is shut down can be circulated to the heater core by controlling the engine water pump, thereby supplementing the heating function of the passenger compartment, appropriately reducing the wind PTC heating power, and reducing the number of engine starts and stops.

[0076] The advantage of the above-mentioned scheme and scenario application is that when the engine is shut down, the waste heat from the engine operation can be used as a heat source for the passenger compartment by controlling the operation of the engine water pump, thereby improving the utilization rate of the engine waste heat.

[0077] At the same time, it can shorten the engine warm-up time and realize the functions of rapid warm-up at low temperatures and rapid cooling of the engine at high temperatures by controlling the operation of the engine water pump at different temperatures.

[0078] This prevents localized engine overheating and enables intelligent pre-control of engine thermal management. Due to the lag in engine water temperature, adjusting the water pump based solely on engine water temperature can easily lead to localized engine overheating. Based on engine torque and speed information, the engine water pump speed is adjusted in real time to activate the water pump before the engine water temperature rises, maintaining the engine water temperature within an appropriate range.

[0079] S3: Obtain the motor water pump speed request value, and perform a second control on the engine circuit based on the electronic fan duty cycle request value. The second control includes calculating the ratio of the motor circuit electronic fan duty cycle request value to the engine circuit electronic fan duty cycle request value to obtain a second ratio, making a judgment based on the second ratio, and adjusting the water pump opening of the motor circuit.

[0080] Furthermore, the motor pump speed request value is obtained, including:

[0081] Based on the temperature values ​​of each component in the motor circuit, calculate the water pump speed request value of each component, and select the maximum value as the water pump speed request value a;

[0082] Specifically, the components in the motor circuit include the generator and drive motor stator, the generator and drive motor IGBT, the motor controller, and the charging and distribution inside, and the temperature is collected based on the temperature sensors of the above components.

[0083] The product value of the water pump speed request value and the second ratio is calculated to obtain a final motor water pump speed request value.

[0084] Furthermore, the water pump opening of the motor circuit is adjusted based on the second ratio, including reducing the motor water pump speed request value according to the second ratio if the engine circuit electronic fan duty cycle requirement is higher than the motor circuit electronic fan duty cycle requirement.

[0085] If the electronic fan duty cycle requirement of the engine circuit is lower than the electronic fan duty cycle requirement of the motor circuit, the water pump opening of the motor circuit is maintained.

[0086] It should be noted that referring to the second ratio can realize the joint control of the motor circuit and the engine circuit. Specifically, if the electronic fan duty cycle requirement of the engine circuit is higher than the electronic fan duty cycle requirement of the motor circuit, it means that the electronic fan duty cycle requirement of the engine circuit is higher than the electronic fan duty cycle requirement of the motor circuit. There is cooling performance redundancy for the motor circuit, so the motor water pump speed request value can be reduced, that is, the opening of the electronic water pump can be reduced to reduce energy consumption.

[0087] The above thermal management optimization method can use an electronic fan to simultaneously cool the water temperature of the engine thermal management circuit and the motor thermal management circuit, maximize the heat dissipation function of the parts, and achieve energy saving and consumption reduction while ensuring the cooling effect.

[0088] The above is a schematic diagram of a hybrid vehicle thermal management optimization method according to this embodiment. It should be noted that the technical solution of this hybrid vehicle thermal management optimization system and the technical solution of the hybrid vehicle thermal management optimization method described above are based on the same concept. For details not described in detail in the technical solution of the hybrid vehicle thermal management optimization system in this embodiment, please refer to the description of the technical solution of the hybrid vehicle thermal management optimization method described above.

[0089] The hybrid vehicle thermal management optimization system in this embodiment includes:

[0090] An electronic fan duty cycle calculation module is used to obtain an electronic fan duty cycle request value, where the electronic fan duty cycle request value is calculated based on the engine circuit electronic fan duty cycle request value and the motor circuit electronic fan duty cycle request value;

[0091] a first control module, configured to obtain a requested duty cycle value of an engine water pump and perform a first control on an engine circuit based on the requested duty cycle value of an electronic fan, wherein the first control comprises calculating a ratio of the requested duty cycle value of the electronic fan of the engine circuit to the requested duty cycle value of the electronic fan of the motor circuit to obtain a first ratio, and making a judgment based on the first ratio to adjust an opening of the water pump of the engine circuit;

[0092] The second control module is used to obtain the motor water pump speed request value and perform a second control on the engine circuit based on the electronic fan duty cycle request value. The second control includes calculating the ratio of the motor circuit electronic fan duty cycle request value to the engine circuit electronic fan duty cycle request value to obtain a second ratio, making a judgment based on the second ratio, and adjusting the water pump opening of the motor circuit.

[0093] This embodiment further provides a computing device suitable for optimizing thermal management of hybrid electric vehicles, including:

[0094] Memory and processor; the memory is used to store computer-executable instructions, and the processor is used to execute computer-executable instructions to implement the hybrid vehicle thermal management optimization method proposed in the above embodiment.

[0095] This embodiment further provides a storage medium storing a computer program, which, when executed by a processor, implements the hybrid vehicle thermal management optimization method proposed in the above embodiment.

[0096] The storage medium proposed in this embodiment and the method for realizing thermal management optimization of hybrid electric vehicles proposed in the above embodiment belong to the same inventive concept. For technical details not fully described in this embodiment, please refer to the above embodiment, and this embodiment has the same beneficial effects as the above embodiment.

[0097] Example 2

[0098] Reference Figure 2 , provides a hybrid electric vehicle thermal management optimization method, based on the previous embodiment, also includes battery circuit control, specifically including,

[0099] Obtain battery temperature and battery function requirements, and control the opening of the expansion valve;

[0100] When the battery needs to be cooled, the first expansion valve is opened to allow the cooling medium to pass through the battery cooler for cooling;

[0101] When there is no need to heat the battery, the first expansion valve is closed and the second expansion valve is opened, allowing the cooling medium to pass through the front evaporator to the passenger compartment for cooling;

[0102] It also includes obtaining a battery water pump opening request based on the battery water inlet temperature;

[0103] When the battery temperature is about to overheat, turn the battery water pump to the maximum;

[0104] If the battery is overheated when not charging, the battery water pump is controlled to open and run continuously.

[0105] It should be noted that the functional requirements of the battery circuit generally include battery cooling and battery heating.

[0106] In addition to the above scenarios, when it is detected that the battery needs to be heated, the battery heating film is controlled to operate.

[0107] At the same time, the battery circuit provided by the present invention can share a refrigerant with the air conditioner. The thermal management architecture pipeline is simple and the control method is flexible. By connecting the battery cooling pipeline with the air conditioner cooling pipeline, the cooling needs of the system can be comprehensively considered, and the cooling effect of the crew cabin and the battery can be controlled by adjusting the expansion valve.

[0108] Through the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented with the help of software and necessary general-purpose hardware, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a computer's floppy disk, read-only memory (ROM), random access memory (RAM), flash memory (FLASH), hard disk or optical disk, etc., including a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods of various embodiments of the present invention.

[0109] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A hybrid electric vehicle thermal management optimization method, characterized in that: include: Obtaining an electronic fan duty cycle request value, where the electronic fan duty cycle request value is calculated based on an engine circuit electronic fan duty cycle request value and a motor circuit electronic fan duty cycle request value; Also includes: Obtaining a vehicle speed factor based on the vehicle speed; Obtain the air conditioning fan duty cycle request value based on battery cooling requirements, ambient temperature range, and vehicle speed range; Comparing the engine circuit electronic fan duty cycle request value and the motor circuit electronic fan duty cycle request value, taking the larger request value and multiplying it by the vehicle speed factor to obtain a first request value; The first request value is compared with the air conditioner fan duty cycle request value, and the larger value is the final electronic fan duty cycle request value; Obtaining an engine water pump duty cycle request value, and performing a first control on the engine circuit based on the electronic fan duty cycle request value, the first control comprising calculating a ratio of the engine circuit electronic fan duty cycle request value to the motor circuit electronic fan duty cycle request value to obtain a first ratio, and making a judgment based on the first ratio to adjust the engine circuit water pump opening; Obtaining the engine water pump duty cycle request value includes: Calculating an initial value of the engine water pump speed request based on the engine speed and engine torque; Obtaining a correction factor for the engine water pump speed request value based on engine water temperature and engine torque change values; Calculating the product of the engine water pump speed request initial value, the engine water pump speed request value correction factor, and the first ratio to obtain the engine water pump duty cycle request value; The method of adjusting the water pump opening of the engine circuit based on the first ratio includes: If the duty cycle requirement of the motor circuit electronic fan is higher than the duty cycle requirement of the engine circuit electronic fan, reducing the engine water pump duty cycle request value according to the first ratio; If the duty cycle requirement of the electronic fan of the motor circuit is lower than the duty cycle requirement of the electronic fan of the engine circuit, the water pump opening of the engine circuit is maintained; Obtaining a motor water pump speed request value, and performing a second control on the engine circuit based on the electronic fan duty cycle request value, the second control comprising calculating a ratio of the motor circuit electronic fan duty cycle request value to the engine circuit electronic fan duty cycle request value to obtain a second ratio, and making a judgment based on the second ratio to adjust the water pump opening of the motor circuit; The process of obtaining the motor water pump speed request value includes: According to the temperature values ​​of each component in the motor circuit, the water pump speed request value of each component is calculated, and the maximum value is selected as the water pump speed request value; Calculate the product of the water pump speed request value and the second ratio to obtain a final motor water pump speed request value; The method of adjusting the water pump opening of the motor circuit based on the second ratio includes: If the duty cycle requirement of the electronic fan of the engine circuit is higher than the duty cycle requirement of the electronic fan of the motor circuit, then reducing the motor water pump speed request value according to the second ratio; If the electronic fan duty cycle requirement of the engine circuit is lower than the electronic fan duty cycle requirement of the motor circuit, the water pump opening of the motor circuit is maintained.

2. The hybrid vehicle thermal management optimization method according to claim 1, characterized in that: It also includes battery circuit control, specifically including, Obtain battery temperature and battery function requirements, and control the opening of the expansion valve; When the battery needs to be cooled, the first expansion valve is opened to allow the cooling medium to pass through the battery cooler for cooling; When there is no need to heat the battery, the first expansion valve is closed and the second expansion valve is opened, allowing the cooling medium to pass through the front evaporator to the passenger compartment for cooling; It also includes obtaining a battery water pump opening request based on the battery water inlet temperature; When the battery temperature is about to overheat, turn the battery water pump to the maximum; If the battery is overheated when not charging, the battery water pump is controlled to open and run continuously.

3. A system for optimizing thermal management of a hybrid electric vehicle, applying the method according to claim 1 or 2, characterized in that: include, An electronic fan duty cycle calculation module is used to obtain an electronic fan duty cycle request value, where the electronic fan duty cycle request value is calculated based on the engine circuit electronic fan duty cycle request value and the motor circuit electronic fan duty cycle request value; a first control module, configured to obtain a requested duty cycle value of an engine water pump and perform a first control on an engine circuit based on the requested duty cycle value of the electronic fan, wherein the first control comprises calculating a ratio of the requested duty cycle value of the electronic fan of the engine circuit to the requested duty cycle value of the electronic fan of the motor circuit to obtain a first ratio, and making a judgment based on the first ratio to adjust an opening of the water pump of the engine circuit; The second control module is used to obtain the motor water pump speed request value and perform a second control on the engine circuit based on the electronic fan duty cycle request value. The second control includes calculating the ratio of the motor circuit electronic fan duty cycle request value to the engine circuit electronic fan duty cycle request value to obtain a second ratio, making a judgment based on the second ratio, and adjusting the water pump opening of the motor circuit.

4. An electronic device comprising: memory and processor; The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, the steps of the hybrid vehicle thermal management optimization method according to any one of claims 1 to 2 are implemented.

5. A computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions, when executed by a processor, implement the steps of the hybrid electric vehicle thermal management optimization method according to any one of claims 1 to 2.

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