Thermal management method, device and equipment of hybrid power system and storage medium

Abstract

The invention provides a thermal management method, device and equipment of a hybrid power system and a storage medium, and relates to the technical field of thermal management, the method comprises the following steps: constructing a power unit model according to heat production parameters of an engine and a motor, and obtaining heat dissipating capacity; determining a heat dissipation component according to the heat dissipation amount, and constructing a heat dissipation unit model based on heat dissipation parameters of the heat dissipation component; dividing an air flowing space area of the power cabin according to the structural layout of the heat dissipation component, and constructing a power cabin model based on the air flowing space area; and performing thermal management on the hybrid power system according to the power unit model, the heat dissipation unit model and the power cabin model. According to the method, non-linear changes of the oil-electricity hybrid power system under different environments and load working conditions are comprehensively considered through multi-field coupling simulation, the thermal state of the system can be accurately captured, and a solid basis is provided for accurate thermal management.

Description

Technical Field

[0001] The present invention relates to the field of thermal management technology, and in particular to a thermal management method, device, equipment and storage medium for a hybrid power system. Background Art

[0002] In recent years, with the increasing demand for range in new energy vehicles and specialized vehicles, hybrid powertrain solutions have become increasingly popular. In this context, the thermal management design quality of hybrid powertrains is directly related to power output performance and vehicle operational reliability, especially in high-temperature environments or under continuous heavy load conditions.

[0003] Currently, thermal management design techniques for hybrid electric systems are primarily based on one-dimensional mathematical formulas for calculation and analysis. While this approach is simple and intuitive, it has significant limitations. Because hybrid electric systems typically employ a compartmentalized structure, their heat flow and energy transfer processes involve multiple subsystems, numerous component characteristics, and nonlinear variations influenced by environmental conditions and load conditions. Consequently, existing thermal management analysis methods struggle to accurately simulate the system's actual operating conditions, resulting in low accuracy in thermal management design and analysis, and failing to meet the stringent requirements of modern engineering for precise thermal management system design. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a thermal management method, device, equipment and storage medium for a hybrid power system, which effectively solves the problem that the existing thermal management analysis method is difficult to accurately simulate the actual operating state of the hybrid power system, resulting in low accuracy of thermal management design analysis.

[0005] In a first aspect, the present invention provides a thermal management method for a hybrid power system, the method comprising: Build a power unit model based on the heat generation parameters of the engine and motor to obtain the heat dissipation; Determine a heat dissipation component according to the heat dissipation amount, and construct a heat dissipation unit model based on heat dissipation parameters of the heat dissipation component; Divide the air flow space area of ​​the power compartment according to the structural layout of the heat dissipation component, and construct a power compartment model based on the air flow space area; Thermal management of a hybrid power system is performed according to the power unit model, the heat dissipation unit model, and the power compartment model.

[0006] In an optional embodiment, the step of constructing a power unit model based on heat generation parameters of the engine and the motor to obtain heat dissipation includes: Constructing a combustion subunit model and a heat transfer subunit model according to the combustion parameters of the engine; Constructing a lubrication subunit model according to the performance parameters of the engine and the motor and the lubricating oil parameters; coupling the combustion subunit model, the heat transfer subunit model, and the lubrication subunit model to obtain the power unit model; A three-dimensional heat dissipation model is constructed and simulation analysis is performed in combination with the power unit model to obtain the heat dissipation amount.

[0007] In an optional embodiment, the combustion subunit model is expressed as follows:

[0008] In the above formula, x Indicates the mass fraction of combustion, that is, the proportion of burned fuel to the total fuel. represents the crankshaft angle, a represents the VIBE coefficient, represents the combustion starting angle, represents the combustion duration angle, m represents the combustion quality coefficient, y represents the dimensionless crankshaft angle.

[0009] In an optional embodiment, determining a heat dissipation component according to the heat dissipation amount and constructing a heat dissipation unit model based on heat dissipation parameters of the heat dissipation component includes: determining the heat dissipation component of each of the heat dissipation components according to the heat dissipation amount; Selecting the heat dissipation components according to the heat dissipation components, and determining the heat dissipation parameters of each heat dissipation component; A heat dissipation unit model is constructed according to the heat dissipation parameters.

[0010] In an optional embodiment, dividing the air flow space area of ​​the power compartment according to the structural layout of the heat dissipation component and constructing the power compartment model based on the air flow space area includes: Dividing the space according to the structural layout of the heat dissipation components in the power compartment to obtain air flow space sub-regions; The air flow space sub-region is discretized into a plurality of control volumes to obtain the power cabin model.

[0011] In an optional embodiment, the performing thermal management on the hybrid power system according to the power unit model, the heat dissipation unit model, and the power compartment model includes: Calculating the engine heat dissipation and water outlet temperature according to the power unit model; Calculating operating parameters of each heat dissipation component according to the heat dissipation unit model, wherein the operating parameters include at least temperature, flow rate and power; Calculate result parameters of the air flow space area according to the power cabin model, and the result parameters include at least pressure, temperature, velocity and mass flow.

[0012] In an optional embodiment, after calculating the operating parameters of each heat dissipation component according to the heat dissipation unit model, the method further includes: The heat dissipation effect and heat dissipation power consumption of the hybrid power system are evaluated according to the operating parameters.

[0013] In a second aspect, the present invention provides a thermal management device for a hybrid power system, the device comprising: A first model building module is used to build a power unit model according to the heat generation parameters of the engine and the motor to obtain the heat dissipation; a second model building module, configured to determine a heat dissipation component according to the heat dissipation amount, and build a heat dissipation unit model based on heat dissipation parameters of the heat dissipation component; a third model building module, configured to divide the air flow space area of ​​the power compartment according to the structural layout of the heat dissipation component, and build a power compartment model based on the air flow space area; The model management and analysis module is used to perform thermal management on the hybrid power system according to the power unit model, the heat dissipation unit model and the power compartment model.

[0014] In a third aspect, the present invention provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement a thermal management method for a hybrid power system as described in any one of the aforementioned embodiments.

[0015] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the method for thermal management of a hybrid power system as described in any one of the aforementioned embodiments is implemented.

[0016] The hybrid power system thermal management method, device, equipment, and storage medium provided by the present invention comprehensively consider the nonlinear changes of the hybrid power system under different environmental and load conditions through multi-field coupling simulation, can accurately capture the thermal state of the system, and provide a solid basis for precise thermal management. Starting with power distribution optimization, the heat dissipation of the engine and motor is carefully analyzed, the parameters of the heat dissipation components are reasonably determined, and then the fan selection is optimized through the gas flow model. With the goal of minimizing power consumption, continuous iteration is carried out to achieve efficient design of the heat dissipation system and improve energy utilization efficiency. At the same time, the power system, heat dissipation system, and power compartment layout are tightly coupled and iteratively calculated to ensure the stability and reliability of the hybrid power system. It can also improve the performance of the hybrid power system as a whole, so that it can still maintain efficient and stable operation under complex working conditions, and promote the development of hybrid power technology to a higher level. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a first schematic diagram of the process of the thermal management method for a hybrid power system provided by an embodiment of the present invention; Figure 2 This is a second schematic diagram of the process of the thermal management method for a hybrid power system provided by an embodiment of the present invention; Figure 3 is a structural schematic diagram of a power unit model in an embodiment of the present invention; Figure 4 is a schematic structural diagram of a three-dimensional heat dissipation model according to an embodiment of the present invention; Figure 5 is a structural schematic diagram of a heat dissipation unit in an embodiment of the present invention; Figure 6 This is a third schematic diagram of the process of the thermal management method for a hybrid power system provided by an embodiment of the present invention; Figure 7 is a structural diagram of a heat dissipation unit model according to an embodiment of the present invention; Figure 8 This is a fourth schematic diagram of a thermal management method for a hybrid power system according to an embodiment of the present invention; Figure 9 is a partial schematic diagram of a power compartment model according to an embodiment of the present invention; Figure 10 Schematic diagram of thermal management relationship of multi-field coupling in an embodiment of the present invention; Figure 11 This is a fifth schematic diagram of a thermal management method for a hybrid power system provided by an embodiment of the present invention; Figure 12 is a schematic structural diagram of a thermal management device for a hybrid power system provided by an embodiment of the present invention; Figure 13 It is a structural diagram of an electronic device provided by an embodiment of the present invention.

[0019] Description of main component symbols: 200. Thermal management device of hybrid power system; 210. First model building module; 220. Second model building module; 230. Third model building module; 240. Model management and analysis module; 300. Electronic device; 310. Processor; 320. Communication interface; 330. Memory; 340. Communication bus. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be further clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. It should be noted that the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0023] Hybrid electric systems primarily contain heat-generating components such as the engine, motor, battery, and energy management unit, which dissipate heat through a radiator. Existing thermal management design techniques for hybrid electric systems often rely on one-dimensional mathematical formulas for design and derivation. While relatively simple and intuitive, hybrid electric systems typically employ a cabin structure and are complex systems. The heat flow and energy transfer process in hybrid electric systems inevitably involves numerous subsystems and the inherent characteristics of numerous components, as well as nonlinear changes caused by specific environmental, load, and other operating conditions. Therefore, existing thermal management analysis methods struggle to accurately simulate the actual operating state of the system, resulting in low accuracy in thermal management design analysis and an inability to meet the stringent requirements of modern engineering for the precise design of thermal management systems.

[0024] Example 1 The hybrid power system thermal management method provided by the embodiment of the present invention effectively solves the problem that existing thermal management analysis methods are difficult to accurately simulate the actual operating state of the hybrid power system, resulting in low accuracy of thermal management design analysis. Figure 1 FIG. 1 is a first schematic diagram of a thermal management method for a hybrid system according to an embodiment of the present invention. Figure 1 As shown, the method includes the following steps: S100: Build a power unit model based on heat generation parameters of the engine and the motor to obtain heat dissipation.

[0025] In the embodiment of the present invention, the hybrid power system may be an oil-electric hybrid power system. By constructing a power unit model using GT-Power software, the amount of heat that needs to be removed by the coolant and the engine oil can be obtained. Figure 2 FIG. 2 is a second schematic diagram of a thermal management method for a hybrid power system according to an embodiment of the present invention. Figure 2 As shown in FIG, constructing the power unit model specifically includes the following steps: S110 , constructing a combustion subunit model and a heat transfer subunit model according to the combustion parameters of the engine.

[0026] The engine's operating process is essentially a complex coupling of combustion and heat transfer. Combustion releases heat, causing the temperature and pressure of the gas in the cylinder to rise, while heat transfer transfers some of the heat to components such as the cylinder wall. Therefore, a combustion subunit model and a heat transfer subunit model are constructed based on the engine's combustion parameters.

[0027] The combustion subunit model uses the VIBE semi-empirical formula, which can better simulate the change of combustion mass fraction with crankshaft angle during the combustion process of the engine. The expression of the combustion subunit model is as follows:

[0028] In the above formula,x Indicates the mass fraction burned, that is, the proportion of burned fuel to the total fuel; Indicates the crankshaft angle; a represents the VIBE coefficient, which is related to the combustion duration and heat release rate, Indicates the combustion start angle, that is, the crankshaft angle at which combustion begins; Indicates the combustion duration angle, which indicates the crankshaft angle range experienced from the beginning to the end of the combustion process; m It represents the combustion quality coefficient, which reflects the shape characteristics of the combustion process; y represents the dimensionless crankshaft angle and is defined as:

[0029] In the above formula, Indicates the heat release ratio per unit crankshaft angle, Q Indicates the total heat input, which is used to determine the total amount of energy released during the combustion process. By integrating, we can get the combustion mass fraction x With crankshaft angle The changing relationship:

[0030] The parameters of the combustion subunit model change with changes in engine operating conditions, including but not limited to speed, load, and injection timing. The relationship between the parameters and the operating conditions can be established through experimental calibration or empirical formulas.

[0031] In an embodiment of the present invention, the heat transfer subunit model may use the Woschni model to calculate the heat transfer coefficient between the in-cylinder gas and the cylinder wall of the engine.

[0032] S120: Construct a lubrication subunit model according to the performance parameters of the engine and the motor and the lubricating oil parameters.

[0033] In this embodiment of the present invention, GT-Power software is used to simulate the lubricating oil circulation power source to calculate the pump outlet flow rate and pressure, the flow of lubricating oil in the oil channel to calculate the pressure drop and temperature change, the lubrication and heat generation of friction pairs such as the main bearing and connecting rod bearing are simulated, the heat exchange between the lubricating oil and the coolant is simulated to control the upper limit of the oil temperature, and the storage and heat dissipation of lubricating oil are simulated to calculate the oil temperature in the oil pan, thereby constructing a lubrication subunit model. Based on this lubrication subunit model, the lubricating oil temperature can be calculated using the energy balance equation.

[0034] S130, coupling the combustion subunit model, the heat transfer subunit model, and the lubrication subunit model to obtain a power unit model.

[0035] In an embodiment of the present invention, the input-output relationships between the combustion, heat transfer, and lubrication subunit models are determined within the GT-Power software. By establishing a unified data interface, data transfer and interaction between the subunit models can be achieved, resulting in a power unit model. For example, the in-cylinder gas temperature and pressure output by the combustion subunit model serve as inputs to the heat transfer subunit model, used to calculate the heat transfer coefficient between the in-cylinder gas and the cylinder wall. Heat generated by combustion and friction serves as heat input to the heat transfer and lubrication subunit models. The temperatures of components such as the cylinder wall calculated by the heat transfer subunit model are then fed back to the combustion and lubrication subunit models, influencing the combustion process and lubricant performance. Figure 3 Schematic diagram of the structure of the power unit model in the embodiment of the present invention. Figure 3 As shown in the figure, the power unit model is built based on GT-Power software, including crankcase, cylinder, turbine, intercooler, compressor and air filter and other equipment.

[0036] S140: Construct a three-dimensional heat dissipation model, perform simulation analysis in combination with the power unit model, and obtain heat dissipation.

[0037] In an embodiment of the present invention, a three-dimensional heat dissipation model is constructed. Figure 4 Schematic diagram of the structure of the three-dimensional heat dissipation model in the embodiment of the present invention. Figure 4 As shown, the 3D heat dissipation model includes the diesel engine, motor, radiator, condenser, intercooler, energy management unit, and power battery. Meshing and condition setting are performed on the 3D heat dissipation model and the power unit model, and simulation analysis is used to determine the amount of heat required to be removed by the engine.

[0038] In the embodiment of the present invention, the power unit model can truly reflect the complex physical processes within the hybrid power system, comprehensively consider the interactions between combustion, heat transfer and lubrication, and can more comprehensively and accurately simulate the working process of the hybrid power system.

[0039] S200 , determining a heat dissipation component according to the heat dissipation amount, and constructing a heat dissipation unit model based on heat dissipation parameters of the heat dissipation component.

[0040] In the embodiment of the present invention, the heat dissipation unit can be modeled and analyzed using GT-Cool. Figure 5 FIG. 1 is a schematic structural diagram of a heat dissipation unit according to an embodiment of the present invention. Figure 5As shown, the heat dissipation unit can be divided into four parts. The heat dissipation unit of the engine and the heat dissipation unit of the motor are arranged in parallel. Part I is the engine water heat dissipation sub-unit. The heat dissipation components mainly include the engine water radiator, intercooler, oil radiator and water pump, which use coolant to cool the engine body. Part II is the intercooler sub-unit. The heat dissipation components mainly include the air filter and supercharger. The coolant is used to cool the intake air entering the engine cylinder after turbocharging. Part III is the lubricating oil cooling circulation sub-unit. The heat dissipation component is the oil pump, which lubricates and cools key components such as the engine piston and connecting rod. Part IV is the heat dissipation sub-unit of the motor. The heat dissipation components mainly include the motor water radiator and water pump. Since the motor can accept a high operating temperature, it is used to dissipate heat for the battery, energy management unit and motor in the cycle.

[0041] Figure 6 FIG3 is a third schematic diagram of a thermal management method for a hybrid power system according to an embodiment of the present invention. Figure 6 As shown in Figure 2, the construction of the heat dissipation unit model specifically includes the following steps: S210: Determine the heat dissipation component of each heat dissipation component according to the heat dissipation amount.

[0042] In the embodiment of the present invention, the heat balance formula is used to calculate the flow rate of the heat dissipation medium required for each heat dissipation component based on the heat dissipation amount combined with parameters such as the specific heat capacity and temperature rise requirement of the heat dissipation medium to obtain the heat dissipation component.

[0043] S220 , selecting heat dissipation components according to the heat dissipation components, and determining heat dissipation parameters of each heat dissipation component.

[0044] In this embodiment of the present invention, the heat dissipation components are selected based on the calculated heat dissipation components, as well as factors such as the installation space and cost of each heat dissipation component. The heat transfer coefficient and heat dissipation area of ​​each heat dissipation component are determined by referring to the heat dissipation component selection manual and relevant standards, taking into account the heat dissipation amount, heat dissipation components, and the physical properties of the heat dissipation medium and air. After determining the type of heat dissipation medium, its physical properties within the operating temperature range are obtained.

[0045] S230: Construct a heat dissipation unit model according to the heat dissipation parameters.

[0046] In this embodiment of the present invention, a cooling unit model is constructed using GT-Cool software based on cooling parameters. Specifically, the cooling unit model's component modules are defined based on the provided engine structural parameters and the cooling parameters of each cooling component. The cooling unit model is then constructed based on the actual operating parameters. Figure 7 FIG. 1 is a schematic structural diagram of a heat dissipation unit model according to an embodiment of the present invention. Figure 7 As shown, the cooling unit model includes the engine cycle, motor cycle, fan, cooling air and expansion tank.

[0047] S300: Divide the air flow space area of ​​the power compartment according to the structural layout of the heat dissipation components, and construct a power compartment model based on the air flow space area.

[0048] In the embodiment of the present invention, the air flow space area of ​​the entire power compartment is simulated by using Cool-3D software. Figure 8 : is a fourth schematic diagram of a thermal management method for a hybrid system according to an embodiment of the present invention. Figure 8 As shown in Figure 2, building the power compartment model specifically includes the following steps: S310. Divide the space according to the structural layout of the heat dissipation components in the power compartment to obtain air flow space sub-regions.

[0049] In an embodiment of the present invention, the air flow space area of ​​the entire power compartment is divided according to the project structure layout of the heat dissipation components, fans and other obstacles in the power compartment, and the natural flow path and forced flow path of the air in the power compartment are combined to obtain air flow space sub-areas.

[0050] S320. Discretize the air flow space sub-region into multiple control volumes to obtain a power cabin model.

[0051] In the embodiment of the present invention, a grid partitioning method is used in the Cool-3D software to discretize each air flow space sub-region into multiple control volumes. Figure 9 FIG. 1 is a partial schematic diagram of a power compartment model according to an embodiment of the present invention. Figure 9 As shown in the figure, the number and spacing of the grid cells are first determined based on the required computational accuracy and the size of the subregions. The positions of the grid nodes are then defined in the one-dimensional direction. Finally, different physical quantities, such as velocity, pressure, and temperature, are typically defined at different grid nodes within the one-dimensional staggered grid to create a power compartment model. The overall power compartment resistance balance determines the fan type and allows observation of any abnormal temperature and pressure areas within the compartment.

[0052] S400: Perform thermal management on the hybrid power system according to the power unit model, the heat dissipation unit model, and the power compartment model.

[0053] Figure 10 Schematic diagram of the thermal management relationship of multi-field coupling in an embodiment of the present invention. Figure 10As shown, for the power unit model constructed using GT-Power software and the cooling unit model constructed using GT-Cool software, the total heat generated by the entire power unit differs due to the different power distribution between the engine and motor. Therefore, for the cooling unit model, the difference in total heat dissipation directly affects the selection of various cooling components and parameters such as the cooling water temperature drop. For the power unit model constructed using GT-Power software and the power compartment model constructed using Cool-3D software, the different power compartment layouts affect the duct bend length and depth within the power compartment, resulting in different cooling air flow resistances, which in turn influences fan selection and, in turn, alters the power consumption of the entire power unit in the auxiliary systems. For both the cooling unit model constructed using GT-Cool software and the power compartment model constructed using Cool-3D software, the cooling unit layout design determines the frontal area of ​​the cooling components. Different frontal areas require different fan parameters, thus affecting the power consumption of the cooling system. Therefore, in the process of thermal management analysis and calculation, the power distribution of the power unit, the calculation of the heat dissipation unit and the layout of the power compartment are mutually coupled processes. Comprehensive consideration and iterative calculation must be made during the calculation process to achieve the optimization of thermal management. Figure 11 5 is a fifth schematic diagram of a thermal management method for a hybrid power system according to an embodiment of the present invention. Figure 11 As shown in the figure, thermal management specifically includes the following steps: S410: Calculate the engine heat dissipation and water outlet temperature according to the power unit model.

[0054] In an embodiment of the present invention, the power distribution between the motor and the engine is first optimized and designed. When the power distribution is determined, the heat generated by the engine and the motor is analyzed separately based on the power unit model to determine the engine heat dissipation and the water outlet temperature.

[0055] S420: Calculate operating parameters of each heat dissipation component according to the heat dissipation unit model. The operating parameters include at least temperature, flow rate, and power.

[0056] In this embodiment of the present invention, the heat dissipation unit model is subject to physical laws such as the conservation of mass, momentum, and energy when performing fluid dynamics calculations on the gas-liquid side. The governing equations for heat transfer are mathematical descriptions of these conservation laws. Computer simulation analysis is used to determine the operating parameters of each heat dissipation component, including coolant volume, temperature, flow rate, and pressure.

[0057] Optionally, the heat dissipation effect and heat dissipation power consumption of the hybrid system can be evaluated based on the operating parameters of each heat dissipation component. For example, based on the obtained operating parameters, it can be evaluated whether the heat dissipation unit can meet the heat dissipation requirements of the entire hybrid system, or the power consumption of the heat dissipation unit can be evaluated.

[0058] S430. Calculate result parameters of the air flow space area according to the power cabin model, where the result parameters include at least pressure, temperature, velocity, and mass flow rate.

[0059] In this embodiment of the present invention, a finite volume method (FVM) is used to perform CFD numerical calculations based on the power compartment model. Calculations are first performed on each sub-area of ​​the air flow space, and finally, the pressure, temperature, velocity, and mass flow rate of the entire air flow space are obtained. The governing equations of the CFD mathematical model are as follows: The continuity equation is:

[0060] The enthalpy equation is:

[0061] The momentum equation is:

[0062] In the above formulas, represents the summation operation of all boundaries of the air flow space sub-region, represents the mass flow rate at the boundary, t Indicates time, m 、 V and p Represent the mass, volume and pressure of the air flow space sub-region respectively, A s represents the heat transfer area, e represents the total internal energy, H represents the total enthalpy, h represents the heat transfer coefficient, T fluid represents the fluid temperature, T wall represents the wall temperature, u represents the velocity at the boundary, A represents the flow area, C f represents the surface friction coefficient, represents the fluid density, dx represents the distance the fluid flows along the flow direction at the boundary, C p Indicates the pressure loss coefficient.

[0063] In the power compartment model, there are various boundary condition-related parameters, such as mass flow boundaries, velocity boundaries, and temperature boundaries. For mass flow boundaries, in the discrete equation, the mass flow at the boundary is substituted as a known quantity into the discrete form of the continuity equation to determine the mass balance of the air flow space sub-region. For velocity boundaries, when the momentum equation is discretized, the velocity value at the boundary is used to calculate the momentum flux through the boundary, affecting the calculation of the change in momentum in the air flow space sub-region. For temperature boundaries, the fluid temperature and wall temperature are known. In the discretization of the enthalpy equation, they are used to calculate the heat transfer term. The heat transfer coefficient and temperature difference jointly determine the heat transfer flux, thereby affecting the energy balance within the control volume.

[0064] In this embodiment of the present invention, since the air velocity in the cooling unit is relatively low, pressure fluctuations within the air duct are not considered. Instead, an implicit solution method is used to calculate the pressure, temperature, velocity, and mass flow rate of the entire air flow area. The resulting parameters are used to determine whether there are areas of abnormal temperature and pressure.

[0065] The hybrid system thermal management method provided by the present invention comprehensively considers the nonlinear variations of the hybrid system under different environmental and load conditions through multi-field coupled simulation. This method accurately captures the system's thermal state and provides a solid foundation for precise thermal management. Starting with power distribution optimization, the heat dissipation of the engine and motor is carefully analyzed, and the parameters of the heat dissipation components are rationally determined. Then, the fan selection is optimized using a gas flow model. Continuous iterations are performed with the goal of minimizing power consumption, achieving efficient design of the heat dissipation system and improving energy efficiency.

[0066] Example 2 Based on the same technical concept as the above-mentioned embodiment 1, an embodiment of the present invention further provides a thermal management device for a hybrid power system. Figure 12 FIG. 1 is a schematic diagram of the structure of a thermal management device for a hybrid power system according to an embodiment of the present invention. Figure 12 As shown, the thermal management device 200 of the hybrid system includes: The first model building module 210 is used to build a power unit model according to the heat generation parameters of the engine and the motor to obtain the heat dissipation.

[0067] The second model building module 220 is configured to determine a heat dissipation component according to the heat dissipation amount, and to build a heat dissipation unit model based on the heat dissipation parameters of the heat dissipation component.

[0068] The third model building module 230 is used to divide the air flow space area of ​​the power compartment according to the structural layout of the heat dissipation components, and build a power compartment model based on the air flow space area.

[0069] The model management and analysis module 240 is used to perform thermal management on the hybrid power system according to the power unit model, the heat dissipation unit model and the power compartment model.

[0070] The thermal management device of the hybrid power system provided by the embodiment of the present invention tightly couples the power system, the heat dissipation system and the power compartment layout and performs iterative calculations, thereby ensuring the stability and reliability of the hybrid power system. It can also improve the performance of the hybrid power system as a whole, so that it can still maintain efficient and stable operation under complex working conditions, and promote the development of hybrid power technology to a higher level.

[0071] It can be understood that the implementation of the thermal management method of the hybrid power system described in the above embodiment 1 is also applicable to this embodiment and can achieve the same technical effects, so it will not be repeated here.

[0072] Example 3 Based on the same concept, an embodiment of the present invention further provides an electronic device, Figure 13 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention, such as Figure 13 As shown, the electronic device 300 may include: a processor 310, a communication interface 320, a memory 330, and a communication bus 340, wherein the processor 310, the communication interface 320, and the memory 330 communicate with each other via the communication bus 340. The processor 310 may call the logic instructions in the memory 330 to execute the steps of the hybrid power system thermal management method described in the above embodiments. For example, the steps include: S100, constructing a power unit model based on heat generation parameters of the engine and the motor to obtain heat dissipation; S200, determining a heat dissipation component according to the heat dissipation amount, and constructing a heat dissipation unit model based on heat dissipation parameters of the heat dissipation component; S300, dividing the air flow space area of ​​the power compartment according to the structural layout of the heat dissipation components, and constructing a power compartment model based on the air flow space area; S400: Perform thermal management on the hybrid power system according to the power unit model, the heat dissipation unit model, and the power compartment model.

[0073] The processor 310 may be a central processing unit (CPU). The processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or a combination of these chips.

[0074] Furthermore, the logic instructions in the aforementioned memory 330 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product, stored in a storage medium, includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0075] The memory 330 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created by the processor, etc. In addition, the memory may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory may optionally include a memory remotely located relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0076] Example 4 Based on the same concept, an embodiment of the present invention further provides a computer-readable storage medium storing a computer program. The computer program includes at least one code segment that can be executed by a main control device to control the main control device to implement the steps of the hybrid power system thermal management method described in the above embodiments. For example, the steps include: S100, constructing a power unit model based on heat generation parameters of the engine and the motor to obtain heat dissipation; S200, determining a heat dissipation component according to the heat dissipation amount, and constructing a heat dissipation unit model based on heat dissipation parameters of the heat dissipation component; S300, dividing the air flow space area of ​​the power compartment according to the structural layout of the heat dissipation components, and constructing a power compartment model based on the air flow space area; S400: Perform thermal management on the hybrid power system according to the power unit model, the heat dissipation unit model, and the power compartment model.

[0077] Based on the same technical concept, an embodiment of the present invention further provides a computer program, which, when executed by a main control device, is used to implement the above method embodiment.

[0078] The computer program may be stored in whole or in part on a computer-readable storage medium packaged with the processor, or may be stored in whole or in part on a memory not packaged with the processor.

[0079] Based on the same technical concept, an embodiment of the present invention further provides a processor for implementing the above method embodiment. The above processor may be a chip.

[0080] In summary, the hybrid system thermal management method, device, equipment, and storage medium provided by the present invention comprehensively consider the nonlinear changes of the hybrid system under different environmental and load conditions through multi-field coupling simulation, accurately capturing the system's thermal state and providing a solid basis for precise thermal management. Starting with power distribution optimization, the heat dissipation of the engine and motor is carefully analyzed, the parameters of the heat dissipation components are rationally determined, and then the fan selection is optimized through gas flow models. With the goal of minimizing power consumption, continuous iteration is performed to achieve efficient design of the heat dissipation system and improve energy efficiency. At the same time, the power system, heat dissipation system, and power compartment layout are tightly coupled and iteratively calculated, ensuring the stability and reliability of the hybrid system. It can also improve the overall performance of the hybrid system, allowing it to maintain efficient and stable operation under complex operating conditions, and promoting the development of hybrid technology to a higher level.

[0081] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0082] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A thermal management method for a hybrid power system, characterized in that: The method comprises: Build a power unit model based on the heat generation parameters of the engine and motor to obtain the heat dissipation; Determine a heat dissipation component according to the heat dissipation amount, and construct a heat dissipation unit model based on heat dissipation parameters of the heat dissipation component; Divide the air flow space area of ​​the power compartment according to the structural layout of the heat dissipation component, and construct a power compartment model based on the air flow space area; Thermal management of a hybrid power system is performed according to the power unit model, the heat dissipation unit model, and the power compartment model.

2. The thermal management method of a hybrid power system according to claim 1, characterized in that: The power unit model is constructed based on the heat generation parameters of the engine and the motor to obtain the heat dissipation, including: Constructing a combustion subunit model and a heat transfer subunit model according to the combustion parameters of the engine; Constructing a lubrication subunit model according to the performance parameters of the engine and the motor and the lubricating oil parameters; coupling the combustion subunit model, the heat transfer subunit model, and the lubrication subunit model to obtain the power unit model; A three-dimensional heat dissipation model is constructed and simulation analysis is performed in combination with the power unit model to obtain the heat dissipation amount.

3. The thermal management method of a hybrid power system according to claim 2, characterized in that: The expression of the combustion subunit model is as follows: In the above formula, x Indicates the mass fraction of combustion, that is, the proportion of burned fuel to the total fuel. represents the crankshaft angle, a represents the VIBE coefficient, represents the combustion starting angle, represents the combustion duration angle, m represents the combustion quality coefficient, y represents the dimensionless crankshaft angle.

4. The thermal management method of a hybrid power system according to claim 1, characterized in that: The step of determining a heat dissipation component according to the heat dissipation amount and constructing a heat dissipation unit model based on heat dissipation parameters of the heat dissipation component includes: determining the heat dissipation component of each of the heat dissipation components according to the heat dissipation amount; Selecting the heat dissipation components according to the heat dissipation components, and determining the heat dissipation parameters of each heat dissipation component; A heat dissipation unit model is constructed according to the heat dissipation parameters.

5. The thermal management method of a hybrid power system according to claim 4, characterized in that: The step of dividing the air flow space area of ​​the power compartment according to the structural layout of the heat dissipation component and constructing the power compartment model based on the air flow space area includes: Dividing the space according to the structural layout of the heat dissipation components in the power compartment to obtain air flow space sub-regions; The air flow space sub-region is discretized into a plurality of control volumes to obtain the power cabin model.

6. The thermal management method of a hybrid power system according to claim 1, characterized in that: The thermal management of the hybrid power system according to the power unit model, the heat dissipation unit model and the power compartment model includes: Calculating the engine heat dissipation and water outlet temperature according to the power unit model; Calculating operating parameters of each heat dissipation component according to the heat dissipation unit model, wherein the operating parameters include at least temperature, flow rate and power; Calculate result parameters of the air flow space area according to the power cabin model, and the result parameters include at least pressure, temperature, velocity and mass flow.

7. The thermal management method of a hybrid power system according to claim 6, characterized in that: After calculating the operating parameters of each heat dissipation component according to the heat dissipation unit model, the method further includes: The heat dissipation effect and heat dissipation power consumption of the hybrid power system are evaluated according to the operating parameters.

8. A thermal management device for a hybrid power system, characterized in that: The device comprises: A first model building module is used to build a power unit model according to the heat generation parameters of the engine and the motor to obtain the heat dissipation; a second model building module, configured to determine a heat dissipation component according to the heat dissipation amount, and build a heat dissipation unit model based on heat dissipation parameters of the heat dissipation component; a third model building module, configured to divide the air flow space area of ​​the power compartment according to the structural layout of the heat dissipation component, and build a power compartment model based on the air flow space area; The model management and analysis module is used to perform thermal management on the hybrid power system according to the power unit model, the heat dissipation unit model and the power compartment model.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: The processor executes the computer program to implement the thermal management method of the hybrid power system according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the thermal management method of the hybrid power system according to any one of claims 1 to 7 is implemented.

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