Battery cooling system matching type selection simulation method, device, equipment and medium

Abstract

The invention provides a battery cooling system matching type selection simulation method and device, equipment and a medium, and belongs to the technical field of battery cooling. An equivalent circuit model is built based on battery physical property parameters, and a battery cooling system is built; constructing a radiator heat dissipation system simulation model, setting variables for the structural size of the radiator, and determining the feasibility of a liquid cooling radiator scheme based on the fast charging time; if the structural size of the radiator meets the whole vehicle arrangement space, it is determined that the liquid side of the battery is cooled through the radiator; and if the structural size of the radiator does not meet the whole vehicle arrangement space, it is determined that the liquid side of the battery is cooled through the air conditioner, a thermodynamic cycle diagram of the air conditioning system is constructed, and matching type selection is conducted on parts in the air conditioning system. Therefore, the performance of various cooling schemes can be quickly evaluated and compared through simulation, and the design efficiency is improved; and various performances of the battery cooling system can be optimized, and the reliability and the stability of the system are improved.

Description

Technical Field

[0001] The present application relates to the field of battery cooling technology, and in particular to a battery cooling system matching selection simulation method, device, equipment and medium. Background Art

[0002] The initial matching and selection of battery cooling systems involves multiple factors and faces the following difficulties: (1) Complex system characteristics. The battery cooling system involves the coupling of multiple physical fields, including heat conduction, fluid flow, heat convection, etc. The system characteristics are relatively complex. In the initial matching and selection stage, these complex system characteristics need to be fully considered to accurately evaluate the performance of different cooling systems; (2) Parameter uncertainty. In the initial matching and selection stage, there may be uncertainty in system parameters, such as the thermal characteristics of the battery, the thermal conductivity coefficient of the cooling system, etc. The uncertainty of these parameters will affect the accuracy and reliability of the selection results; (3) Multi-objective optimization problems. The selection of battery cooling systems usually involves multiple objectives, such as reducing battery temperature, improving cooling efficiency, and reducing system costs. In the initial matching and selection stage, these multiple objectives need to be weighed and optimized, which increases the complexity of the selection problem; (4) Comparison of multiple design schemes. In the initial matching and selection stage, it is necessary to compare and evaluate multiple different design schemes, including different types of cooling media, cooling systems, and air conditioning system structures. Comprehensive comparison and evaluation of these different design solutions requires consideration of multiple factors, which increases the difficulty of the selection problem; (5) Time and resource constraints. In the initial matching and selection stage, time and resources are usually limited, and it is necessary to complete the evaluation and comparison of different design solutions within the limited time and resources. Summary of the invention

[0003] In view of this, the purpose of the present application is to provide a battery cooling system matching selection simulation method, device, equipment and medium, which can improve the design efficiency of the battery cooling system through simulation and improve the accuracy and reliability of parts selection.

[0004] In a first aspect, the present application provides a battery cooling system matching and selection simulation method, the method comprising the following steps:

[0005] Build an equivalent circuit model based on the physical parameters of the battery, and build a battery cooling system; the battery side uses a liquid cooling system to cool the battery, and the battery liquid side is cooled by a radiator or air conditioner;

[0006] Construct a simulation model of the radiator cooling system, set variables for the structural dimensions of the radiator, determine the feasibility of the liquid cooling radiator solution based on the fast charging time, and generate a relationship diagram for different frontal areas of the radiator and the corresponding charging time to determine whether the structural dimensions of the radiator meet the vehicle layout space based on the relationship diagram;

[0007] If the structural dimensions of the radiator meet the space requirements of the vehicle layout, the battery liquid side will be cooled by the radiator; if the structural dimensions of the radiator do not meet the space requirements of the vehicle layout, the battery liquid side will be cooled by air conditioning, and a thermodynamic cycle diagram of the air conditioning system will be constructed, and the components in the air conditioning system will be matched and selected.

[0008] In a possible implementation manner, constructing a radiator cooling system simulation model includes the following steps:

[0009] Build a 1D water pipe model;

[0010] Building a radiator model based on radiator parameters; wherein the radiator parameters include radiator flat tubes, fins, length, width, and height;

[0011] Build a water pump model and define the maximum speed and displacement of the water pump; wherein the water pump is used to transport coolant from the radiator to the battery for heat dissipation.

[0012] In a possible implementation manner, constructing a thermodynamic cycle diagram of an air conditioning system comprises the following steps:

[0013] Select refrigerant;

[0014] Establishing a compressor compression process for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas through a compressor;

[0015] Establishing a condenser condensation process, for cooling and condensing high-temperature and high-pressure refrigerant gas into liquid in the condenser;

[0016] Establishing an expansion valve throttling process for sending refrigerant to the evaporator through the expansion valve for circulation;

[0017] Establishing an evaporator evaporation endothermic process to change the refrigerant from liquid to low-temperature gas in the evaporator;

[0018] Determine the basic information of the air conditioning system cycle, which is used to determine the refrigerant charge and system performance coefficient based on the cooling capacity of the evaporator.

[0019] In a possible implementation, the compressor is matched and selected in the following manner:

[0020] The compressor inlet and outlet boundaries generated in the thermodynamic cycle diagram of the air-conditioning system are input into the compressor model, and the speed of the currently selected compressor model is analyzed through PI adjustment based on the target mass flow rate.

[0021] In a possible implementation, the condenser is selected and matched in the following manner:

[0022] The inlet and outlet boundaries of the condenser generated in the thermodynamic cycle diagram of the air-conditioning system are input into the condenser model. Based on the target heat exchange, a DOE analysis is performed on the windward area of ​​the condenser to determine the size of the condenser.

[0023] In a possible implementation, the expansion valve is matched and selected in the following manner:

[0024] The inlet and outlet boundaries of the expansion valve generated in the thermodynamic cycle diagram of the air-conditioning system are input into the expansion valve model. Based on the target pressure drop and mass flow rate, the cross-sectional area of ​​the currently selected expansion valve model is analyzed through PI adjustment.

[0025] In a possible implementation, the evaporator is matched and selected in the following manner:

[0026] The evaporator inlet and outlet boundaries generated in the thermodynamic cycle diagram of the air-conditioning system are input into the evaporator model. The evaporator frontal area is subjected to DOE analysis based on the target heat exchange rate to determine the size of the evaporator.

[0027] In a second aspect, the present application provides a battery cooling system matching and selection simulation device, the device comprising:

[0028] A building module is used to build an equivalent circuit model based on the physical parameters of the battery and to build a battery cooling system; the battery side uses a liquid cooling system to cool the battery, and the battery liquid side is cooled by a radiator or air conditioner;

[0029] A simulation module is used to construct a simulation model of the radiator cooling system, set variables for the structural dimensions of the radiator, determine the feasibility of the liquid cooling radiator solution based on the fast charging time, and generate a relationship diagram for different frontal areas of the radiator and the corresponding charging time, so as to determine whether the structural dimensions of the radiator meet the layout space of the vehicle according to the relationship diagram;

[0030] The selection module is used to determine whether the battery liquid side is cooled by the radiator if the structural dimensions of the radiator meet the vehicle layout space; if the structural dimensions of the radiator do not meet the vehicle layout space, determine whether the battery liquid side is cooled by the air conditioner, construct a thermodynamic cycle diagram of the air conditioning system, and match and select the components in the air conditioning system.

[0031] In a third aspect, the present application provides an electronic device, comprising: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate through the bus, and when the machine-readable instructions are executed by the processor, the steps of the battery cooling system matching selection simulation method as described in the first aspect are performed.

[0032] In a fourth aspect, the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the battery cooling system matching and selection simulation method as described in the first aspect are executed.

[0033] The present embodiment provides a battery cooling system matching and selection simulation method, device, equipment and medium, which builds an equivalent circuit model based on the physical parameters of the battery and builds a battery cooling system; constructs a radiator cooling system simulation model, and sets the structural dimensions of the radiator as a variable, determines the feasibility of the liquid cooling radiator solution based on the fast charging time, and generates a relationship diagram for different windward areas of the radiator and the corresponding charging time, so as to determine whether the structural dimensions of the radiator meet the vehicle layout space according to the relationship diagram; if the structural dimensions of the radiator meet the vehicle layout space, determine to cool the battery liquid side through the radiator; if the structural dimensions of the radiator do not meet the vehicle layout space, determine to cool the battery liquid side through the air conditioner, and build a thermodynamic cycle diagram of the air conditioning system, and match and select the components in the air conditioning system. Therefore, through simulation, the performance of multiple cooling solutions can be quickly evaluated and compared to improve design efficiency; and the various performances of the battery cooling system can be optimized to improve the reliability and stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A schematic diagram of a flow chart of a battery cooling system matching and selection simulation method described in an embodiment of the present application;

[0036] Figure 2 A schematic diagram of a simulation model of a heat sink cooling system according to an embodiment of the present application;

[0037] Figure 3 A schematic diagram of detailed parameters of a water pump model described in an embodiment of the present application;

[0038] Figure 4 A relationship diagram between different windward areas of the radiator and corresponding charging time in one embodiment of the present application;

[0039] Figure 5 It is a schematic diagram comparing the target mass flow rate and the simulated flow rate of the compressor described in one embodiment of the present application;

[0040] Figure 6 A schematic diagram showing a comparison between the target heat dissipation and the simulated heat dissipation of the condenser in one embodiment of the present application;

[0041] Figure 7 A schematic diagram showing a comparison between the target heat dissipation of the evaporator and the simulated heat dissipation in one embodiment of the present application;

[0042] Figure 8 It is a structural block diagram of a battery cooling system matching and selection simulation device described in an embodiment of the present application;

[0043] Fig. 9 It is a structural block diagram of an electronic device described in an embodiment of the present application. DETAILED DESCRIPTION

[0044] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of explanation and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn in real proportion. The flowchart used in this application shows the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowchart can be implemented out of sequence, and the steps without logical context can be reversed in order or implemented simultaneously. In addition, those skilled in the art can add one or more other operations to the flowchart under the guidance of the content of the present application, or remove one or more operations from the flowchart.

[0045] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application usually described and marked in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0046] It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the existence of the features declared thereafter, but does not exclude the addition of other features.

[0047] Based on the technical problems raised by the background technology, the present application provides a battery cooling system matching selection simulation method, device, equipment and medium, which can improve the design efficiency of the battery cooling system through simulation and improve the accuracy and reliability of parts selection.

[0048] See the instruction manual Figure 1 In one embodiment, the present application provides a battery cooling system matching selection simulation method, comprising the following steps:

[0049] S1. Build an equivalent circuit model based on the physical parameters of the battery, and build a battery cooling system; the battery side uses a liquid cooling system to cool the battery, and the battery liquid side is cooled by a radiator or air conditioner;

[0050] S2. Construct a simulation model of the radiator cooling system, set variables for the structural dimensions of the radiator, determine the feasibility of the liquid cooling radiator solution based on the fast charging time, and generate a relationship diagram for different frontal areas of the radiator and the corresponding charging time, so as to determine whether the structural dimensions of the radiator meet the vehicle layout space according to the relationship diagram;

[0051] S3. If the structural dimensions of the radiator meet the space requirements of the vehicle layout, determine to cool the battery liquid side through the radiator; if the structural dimensions of the radiator do not meet the space requirements of the vehicle layout, determine to cool the battery liquid side through air conditioning, construct a thermodynamic cycle diagram of the air conditioning system, and match and select the components in the air conditioning system.

[0052] Specifically, in step S1, an equivalent circuit model is built based on the physical parameters of the battery used, the battery cooling power requirement is preliminarily determined according to the fast charging time requirement and the target temperature, and a detailed battery cooling system is built. In this embodiment, a liquid cooling system is used on the battery side to cool the battery, and a radiator or air conditioning system is used to cool the battery liquid side.

[0053] Since the radiator consumes less energy than the air conditioning system, in step S2, radiator cooling is selected first. Among them, liquid cooling radiator is a commonly used battery cooling method, which uses liquid (usually coolant) to transfer heat and reduce the temperature of the battery. The working principle is as follows: the liquid flows through the pipes or channels of the radiator, transferring heat along the surface or inside of the battery. When the liquid flows through the battery, it absorbs the heat generated by the battery and then brings the heat to the radiator. In the radiator, the liquid exchanges heat with the surrounding environment (usually air), releases heat to the environment, and then circulates back to the battery to continue absorbing heat, completing a cyclic cooling process.

[0054] The liquid cooling radiator battery cooling method has the advantages of high heat dissipation efficiency, good stability, strong controllability and low cost. It is particularly suitable for high-power battery systems with high requirements for heat dissipation performance, such as electric vehicles and battery energy storage systems. Through reasonable design and optimization, the liquid cooling radiator can effectively reduce the battery temperature and improve the performance and reliability of the system. See the attached manual Figure 2 In one embodiment, a radiator cooling system simulation model is constructed in the following manner:

[0055] Build a 1D water pipe model; in order to build a 1D water pipe model more accurately and quickly, the 3D digital model can be directly imported into the 1D simulation model, and the 1D pipeline model can be automatically generated after importing;

[0056] Build a radiator model; Liquid cooling radiators are usually composed of flat tubes, fins and other heat dissipation channels. Flat tubes, fins and other structures are used to circulate the coolant inside the radiator and increase the heat dissipation area to improve the heat dissipation efficiency; You can build a model based on the existing radiator parameters and input the radiator flat tubes, fins, length, width, height and other parameters;

[0057] Build a water pump model; water pumps are usually used to transport coolant from the radiator to the equipment that needs to be cooled (such as batteries, engines, etc.) to achieve the purpose of heat dissipation. In this application, it is mainly to analyze the flow demand of the water system, so please refer to the attached manual. Figure 3 , only the speed and displacement of the pump are defined.

[0058] It should also be noted that the selection of a suitable coolant is an important consideration in the design of a liquid-cooled radiator. Commonly used coolants include water, ethylene glycol aqueous solution, and special coolants. The selection of the coolant should take into account factors such as its thermal conductivity, corrosion resistance, freezing point, boiling point, etc. This embodiment uses a 50% ethylene glycol mixed solution.

[0059] Furthermore, in step S2, based on the existing radiator model, the structural dimensions of the radiator are set as variables, the effect of changing the windward area of ​​the radiator on battery cooling and fast charging performance is analyzed, and the feasibility of the liquid cooling radiator solution is determined based on the target fast charging time. In one embodiment, a relationship diagram between different windward areas of the radiator and the corresponding charging time is generated to determine whether the structural dimensions of the radiator meet the vehicle layout space, as shown in the attached manual. Figure 4 As shown, the horizontal line in the figure represents the target fast charging time of the battery, and the dots in the figure represent the fast charging time corresponding to different windward areas of the radiator. It can be seen that increasing the size of the radiator will increase the cooling capacity and reduce the battery charging time, but increasing the windward area of ​​the radiator by 4 times will only save 4 minutes of charging time.

[0060] Therefore, if the layout space of the whole vehicle is large enough to accommodate the installation of a radiator of the corresponding structural size, the cooling solution is determined to be radiator cooling; if the layout space of the whole vehicle is small and the oversized radiator cannot meet the installation requirements of the layout space of the whole vehicle, the cooling solution is determined to be air-conditioning cooling. Among them, the automotive air-conditioning system has the advantages of precise temperature control capability, efficient heat dissipation efficiency, stable performance and reliability, which can improve the performance and life of the battery pack, reduce maintenance costs, and improve the reliability and safety of the system. In step S3, a thermodynamic cycle diagram (pressure diagram, temperature entropy diagram) of the air-conditioning system is established based on the design objectives. The design of the air-conditioning system and the matching and selection of components are all based on this cycle. The following process shows the basic working principle of the air-conditioning system:

[0061] Refrigerant selection: R1234yf has a lower global warming potential (GWP) than R134a, so R134a is being gradually replaced. In this embodiment, R1234fy is used for thermodynamic cycle analysis.

[0062] The compressor compression process is established. The compressor compresses the low-temperature and low-pressure refrigerant gas into a high-temperature and high-pressure gas, which increases the temperature and pressure of the refrigerant. This embodiment defines the compressor inlet condition according to the evaporator (chiller) outlet temperature and superheat. In order to enable the air-conditioning system to produce a better cooling effect, the Tr temperature value is as small as possible, so △T needs to be as large as possible, where:

[0063] Tr = Tc - ΔT;

[0064] Tr: chiller refrigerant side outlet temperature (compressor inlet temperature);

[0065] Tc: chiller coolant side temperature (defined as a fixed value in this embodiment);

[0066] △T: The temperature difference between the chiller coolant side and the refrigerant side (as large as possible);

[0067] In order to protect the compressor from liquid hammer, the system design should ensure that the refrigerant at the chiller outlet (compressor inlet) has a certain degree of superheat;

[0068] A condenser condensation process is established. In the condenser, the high-temperature and high-pressure refrigerant gas is cooled and condensed into a liquid state. In this process, the heat released by the refrigerant is transferred to the external environment, causing the air temperature to rise. In this embodiment, the temperature and density of the refrigerant at the compressor outlet are used as the condenser inlet conditions, and the condenser outlet pressure is kept consistent with the compressor outlet (pressure drop is not considered for the time being). Under high temperature conditions in summer, excessive subcooling of the condenser will cause the system pressure to increase, ultimately affecting the normal operation of the system. Therefore, it is necessary to reasonably control the subcooling of the condenser to ensure the normal operation of the system and extend the service life of the equipment;

[0069] Establish the expansion valve throttling process. The expansion valve is a throttling device used to reduce the pressure and temperature of the refrigerant and send it to the evaporator for circulation to complete the entire refrigeration cycle. In this example, the refrigerant temperature and density value at the condenser outlet are used as the expansion valve inlet conditions. The expansion valve outlet pressure and enthalpy value are consistent with the compressor inlet.

[0070] Establish the evaporation heat absorption process of the evaporator (chiller). In the evaporator, the refrigerant (usually liquid) changes from a low-pressure state to a low-temperature gas, absorbing the surrounding heat and lowering the air temperature. The low-temperature air is sent into the passenger compartment through the blower and the air duct to cool the occupants. In this example, the refrigerant temperature and density values ​​at the outlet of the expansion valve are used as the evaporator inlet conditions; the evaporator outlet pressure and density are consistent with the compressor inlet;

[0071] Determine the basic information of the air conditioning system cycle. After the thermodynamic cycle diagram of the air conditioning system is completed, determine the refrigerant charge of the air conditioning system and the system performance coefficient (COP) according to the target cooling capacity of the evaporator (chiller) (cooling demand power).

[0072] Furthermore, after the thermodynamic cycle diagram of the air-conditioning system is completed, it is necessary to select the components of the air-conditioning system.

[0073] For compressor selection, the inlet and outlet boundaries of the compressor generated in the thermodynamic cycle diagram of the air conditioning system are input into the compressor model, and the speed required by the currently selected compressor model is analyzed through PI adjustment based on the target mass flow rate. The comparison results between the compressor target mass flow rate and the simulated flow rate are shown in the attached manual. Figure 5 As shown;

[0074] For the selection of condenser, the inlet and outlet boundaries of the condenser generated in the thermodynamic cycle diagram of the air conditioning system are input into the condenser model, and the DOE analysis of the windward area of ​​the condenser is performed based on the target heat exchange to determine the appropriate condenser size. The comparison results of the target heat dissipation of the condenser and the simulated heat dissipation are shown in the attached manual. Figure 6 As shown;

[0075] Selection of expansion valve: Input the inlet and outlet boundaries of the expansion valve generated in the thermodynamic cycle diagram of the air conditioning system into the expansion valve model, and analyze the required cross-sectional area of ​​the currently selected expansion valve based on the target pressure drop and mass flow through PI adjustment;

[0076] For the selection of the evaporator (chiller), the inlet and outlet boundaries of the evaporator generated in the thermodynamic cycle diagram of the air conditioning system are input into the evaporator model, and the evaporator frontal area is subjected to DOE analysis based on the target heat exchange rate to determine the appropriate evaporator size (width, number of channels, etc.). The comparison results of the target heat dissipation of the evaporator (chiller) and the simulated heat dissipation are shown in the attached manual. Figure 7 As shown, the parts selection of the air conditioning cooling system is now completed.

[0077] The present application provides a battery cooling system matching and selection simulation method, which can quickly evaluate and compare the performance of multiple cooling solutions through simulation, thereby helping to quickly determine the optimal design solution, discover problems and optimize them during the design phase, and improve design efficiency; and through simulation, various performance of the battery cooling system can be comprehensively optimized, including lowering battery temperature, improving cooling efficiency, reducing system costs, etc., thereby improving system reliability and stability.

[0078] As the instruction manual Figure 8 As shown, the present application also provides a battery cooling system matching selection simulation device, the device comprising:

[0079] Building module 801, used to build an equivalent circuit model based on battery physical parameters and build a battery cooling system; wherein the battery side uses a liquid cooling system to cool the battery, and the battery liquid side is cooled by a radiator or air conditioner;

[0080] The simulation module 802 is used to construct a simulation model of the radiator cooling system, set the structural dimensions of the radiator as variables, determine the feasibility of the liquid cooling radiator solution based on the fast charging time, and generate a relationship diagram for different frontal areas of the radiator and the corresponding charging time, so as to determine whether the structural dimensions of the radiator meet the layout space of the vehicle according to the relationship diagram;

[0081] The selection module 803 is used to determine that the battery liquid side is cooled by the radiator if the structural dimensions of the radiator meet the vehicle layout space; if the structural dimensions of the radiator do not meet the vehicle layout space, determine that the battery liquid side is cooled by air conditioning, and construct a thermodynamic cycle diagram of the air conditioning system, and match and select components in the air conditioning system.

[0082] In some embodiments, the simulation module 802 constructs a radiator cooling system simulation model, including: building a 1D water pipe model; building a radiator model based on radiator parameters; wherein the radiator parameters include radiator flat tubes, fins, length, width, and height; building a water pump model, and defining the maximum speed and displacement of the water pump; wherein the water pump is used to transport coolant from the radiator to the battery for heat dissipation.

[0083] In some embodiments, the selection module 803 constructs a thermodynamic cycle diagram of the air-conditioning system, including: selecting a refrigerant; establishing a compressor compression process, which is used to compress the low-temperature and low-pressure refrigerant gas into a high-temperature and high-pressure refrigerant gas through a compressor; establishing a condenser condensation process, which is used to cool and condense the high-temperature and high-pressure refrigerant gas into a liquid in the condenser; establishing an expansion valve throttling process, which is used to send the refrigerant into the evaporator through the expansion valve for circulation; establishing an evaporator evaporation endothermic process, which is used to change the refrigerant from a liquid to a low-temperature gas in the evaporator; and determining basic information of the air-conditioning system cycle, which is used to determine the refrigerant charge amount and the system performance coefficient according to the cooling capacity of the evaporator.

[0084] In some embodiments, the selection module 803 selects the compressor for matching, including: inputting the compressor inlet and outlet boundaries generated in the thermodynamic cycle diagram of the air-conditioning system into the compressor model, analyzing the rotation speed of the currently selected compressor model through PI adjustment based on the target mass flow.

[0085] In some embodiments, the selection module 803 selects the condenser for matching, including: inputting the inlet and outlet boundaries of the condenser generated in the thermodynamic cycle diagram of the air-conditioning system into the condenser model, performing DOE analysis on the windward area of ​​the condenser based on the target heat exchange, and determining the size of the condenser.

[0086] In some embodiments, the selection module 803 matches and selects the expansion valve, including: inputting the inlet and outlet boundaries of the expansion valve generated in the thermodynamic cycle diagram of the air-conditioning system into the expansion valve model, and analyzing the cross-sectional area of ​​the currently selected expansion valve model through PI adjustment based on the target pressure drop and mass flow.

[0087] In some embodiments, the selection module 803 selects the evaporator for matching, including: inputting the evaporator inlet and outlet boundaries generated in the thermodynamic cycle diagram of the air-conditioning system into the evaporator model, performing DOE analysis on the windward area of ​​the evaporator based on the target heat exchange, and determining the size of the evaporator.

[0088] The present application provides a battery cooling system matching and selection simulation device, which builds an equivalent circuit model based on the physical parameters of the battery through a building module, and builds a battery cooling system; constructs a radiator cooling system simulation model through a simulation module, and sets the structural dimensions of the radiator as a variable, determines the feasibility of the liquid cooling radiator solution based on the fast charging time, and generates a relationship diagram for different windward areas of the radiator and the corresponding charging time, so as to determine whether the structural dimensions of the radiator meet the layout space of the whole vehicle according to the relationship diagram; if the structural dimensions of the radiator meet the layout space of the whole vehicle, the selection module determines to cool the battery liquid side through the radiator; if the structural dimensions of the radiator do not meet the layout space of the whole vehicle, the selection module determines to cool the battery liquid side through the air conditioner, and constructs a thermodynamic cycle diagram of the air conditioning system, and matches and selects the components in the air conditioning system. Therefore, through simulation, the performance of various cooling solutions can be quickly evaluated and compared to improve the design efficiency; and the various performances of the battery cooling system can be optimized to improve the reliability and stability of the system.

[0089] Based on the same concept of the present invention, the specification is attached Fig. 9 As shown, the structure of an electronic device 900 provided in an embodiment of the present application includes: at least one processor 901, at least one network interface 904 or other user interface 903, a memory 905, and at least one communication bus 902. The communication bus 902 is used to realize the connection and communication between these components. The electronic device 900 optionally includes a user interface 903, including a display (for example, a touch screen, LCD, CRT, holographic imaging (Holographic) or projection (Projector), etc.), a keyboard or a pointing device (for example, a mouse, a trackball (trackball), a touch pad or a touch screen, etc.).

[0090] The memory 905 may include a read-only memory and a random access memory, and provides instructions and data to the processor 901. A portion of the memory 905 may also include a non-volatile random access memory (NVRAM).

[0091] In some implementations, the memory 905 stores the following elements, executable modules or data structures, or a subset thereof, or an extended set thereof:

[0092] Operating system 9051, including various system programs for implementing various basic services and processing hardware-based tasks;

[0093] The application module 9052 includes various application programs, such as a launcher, a media player, a browser, etc., which are used to implement various application services.

[0094] In an embodiment of the present application, by calling the program or instructions stored in the memory 905, the processor 901 is used to execute steps in a battery cooling system matching selection simulation method, which can improve the design efficiency of the battery cooling system through simulation and improve the accuracy and reliability of parts selection.

[0095] The present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps in the battery cooling system matching and selection simulation method are executed.

[0096] Specifically, the storage medium can be a general storage medium, such as a mobile disk, a hard disk, etc. When the computer program on the storage medium is run, the above-mentioned battery cooling system matching selection simulation method can be executed.

[0097] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0098] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0099] In addition, each functional unit in the embodiments provided in the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0100] If the function is implemented in the form of a business function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes a number of instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0101] Finally, it should be noted that the above embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the aforementioned embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application. They should all be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A battery cooling system matching and selection simulation method, characterized in that: The method comprises the following steps: Build an equivalent circuit model based on the physical parameters of the battery, and build a battery cooling system; the battery side uses a liquid cooling system to cool the battery, and the battery liquid side is cooled by a radiator or air conditioner; Construct a simulation model of the radiator cooling system, set variables for the structural dimensions of the radiator, determine the feasibility of the liquid cooling radiator solution based on the fast charging time, and generate a relationship diagram for different frontal areas of the radiator and the corresponding charging time to determine whether the structural dimensions of the radiator meet the vehicle layout space based on the relationship diagram; If the structural dimensions of the radiator meet the space requirements of the vehicle layout, the battery liquid side will be cooled by the radiator; if the structural dimensions of the radiator do not meet the space requirements of the vehicle layout, the battery liquid side will be cooled by air conditioning, and a thermodynamic cycle diagram of the air conditioning system will be constructed, and the components in the air conditioning system will be matched and selected.

2. According to claim 1, a battery cooling system matching and selection simulation method is characterized in that: The construction of the radiator cooling system simulation model comprises the following steps: Build a 1D water pipe model; Building a radiator model based on radiator parameters; wherein the radiator parameters include radiator flat tubes, fins, length, width, and height; Build a water pump model and define the maximum speed and displacement of the water pump; wherein the water pump is used to transport coolant from the radiator to the battery for heat dissipation.

3. According to claim 2, a battery cooling system matching selection simulation method is characterized in that: The construction of the thermodynamic cycle diagram of the air conditioning system comprises the following steps: Select refrigerant; Establishing a compressor compression process for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas through a compressor; Establishing a condenser condensation process, for cooling and condensing high-temperature and high-pressure refrigerant gas into liquid in the condenser; Establishing an expansion valve throttling process for circulating the refrigerant into the evaporator through the expansion valve; Establishing an evaporator evaporation endothermic process to change the refrigerant from liquid to low-temperature gas in the evaporator; Determine the basic information of the air conditioning system cycle, which is used to determine the refrigerant charge and system performance coefficient based on the cooling capacity of the evaporator.

4. According to claim 3, a battery cooling system matching and selection simulation method is characterized in that: The compressor is selected by: The compressor inlet and outlet boundaries generated in the thermodynamic cycle diagram of the air-conditioning system are input into the compressor model, and the speed of the currently selected compressor model is analyzed through PI adjustment based on the target mass flow rate.

5. According to claim 4, a battery cooling system matching and selection simulation method is characterized in that: The condenser is selected by: The inlet and outlet boundaries of the condenser generated in the thermodynamic cycle diagram of the air-conditioning system are input into the condenser model. Based on the target heat exchange, a DOE analysis is performed on the windward area of ​​the condenser to determine the size of the condenser.

6. According to claim 5, a battery cooling system matching and selection simulation method is characterized in that: The expansion valve can be matched and selected in the following ways: The inlet and outlet boundaries of the expansion valve generated in the thermodynamic cycle diagram of the air-conditioning system are input into the expansion valve model. Based on the target pressure drop and mass flow rate, the cross-sectional area of ​​the currently selected expansion valve model is analyzed through PI adjustment.

7. A battery cooling system matching and selection simulation method according to claim 6, characterized in that: The evaporator is selected by the following methods: The evaporator inlet and outlet boundaries generated in the thermodynamic cycle diagram of the air-conditioning system are input into the evaporator model. The evaporator frontal area is subjected to DOE analysis based on the target heat exchange rate to determine the size of the evaporator.

8. A battery cooling system matching and selection simulation device, characterized in that: The device comprises: A building module is used to build an equivalent circuit model based on the physical parameters of the battery and to build a battery cooling system; the battery side uses a liquid cooling system to cool the battery, and the battery liquid side is cooled by a radiator or air conditioner; A simulation module is used to construct a simulation model of the radiator cooling system, set variables for the structural dimensions of the radiator, determine the feasibility of the liquid cooling radiator solution based on the fast charging time, and generate a relationship diagram for different frontal areas of the radiator and the corresponding charging time, so as to determine whether the structural dimensions of the radiator meet the layout space of the vehicle according to the relationship diagram; The selection module is used to determine whether the battery liquid side is cooled by the radiator if the structural dimensions of the radiator meet the vehicle layout space; if the structural dimensions of the radiator do not meet the vehicle layout space, determine whether the battery liquid side is cooled by the air conditioner, construct a thermodynamic cycle diagram of the air conditioning system, and match and select the components in the air conditioning system.

9. An electronic device, characterized in that: include: A processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate via the bus, and when the machine-readable instructions are executed by the processor, the steps of the battery cooling system matching selection simulation method as described in any one of claims 1 to 7 are performed.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the battery cooling system matching and selection simulation method as described in any one of claims 1 to 7 are executed.

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