A battery cooling system matching selection simulation method, device, equipment and medium

Abstract

The application provides a battery cooling system matching selection simulation method, device, equipment and medium, belongs to the battery cooling technical field, builds an equivalent circuit model based on battery physical parameters, and builds a battery cooling system; a radiator heat dissipation system simulation model is constructed, and the structure size of the radiator is set as a variable, the feasibility of the liquid cooling radiator scheme is determined based on the fast charging time; if the structure size of the radiator meets the vehicle arrangement space, it is determined that the battery liquid side is cooled through the radiator; if the structure size of the radiator does not meet the vehicle arrangement space, it is determined that the battery liquid side is cooled through the air conditioner, and a thermodynamic cycle diagram of the air conditioning system is constructed, and the parts in the air conditioning system are matched and selected. Therefore, the performance of various cooling schemes can be quickly evaluated and compared through simulation, and the design efficiency is improved; and the performance of the battery cooling system can be optimized, and the reliability and stability of the system are improved.

Description

TECHNICAL FIELD

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

[0002] The initial matching selection of the battery cooling system 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 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 selection stage, there may be uncertainty in system parameters, such as the thermal characteristics of the battery and the thermal conductivity coefficient of the cooling system. The uncertainty of these parameters will affect the accuracy and reliability of the selection result; (3) multi-objective optimization problem. The selection of the battery cooling system usually involves multiple objectives, such as reducing the battery temperature, improving the cooling efficiency, and reducing the system cost. In the initial matching 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. The initial matching selection stage needs to compare and evaluate multiple different design schemes, including different types of cooling medium, cooling system, air conditioning system structure, etc. Comprehensive comparison and evaluation of these different design schemes need to consider multiple factors, increasing the difficulty of the selection problem; (5) time and resource constraints. In the initial matching selection stage, time and resources are usually limited, and the evaluation and comparison of different design schemes need to be completed within limited time and resources. SUMMARY

[0003] Therefore, 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 and improve the accuracy and reliability of the part selection.

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

[0005] An equivalent circuit model is built based on the physical parameters of the battery, and a battery cooling system is built. The battery is cooled by a liquid cooling system on the battery side, and the battery liquid side is cooled by a radiator or an air conditioner;

[0006] A radiator heat dissipation system simulation model is constructed, and the structural size of the radiator is set as a variable. The feasibility of the liquid-cooled radiator scheme is determined based on the fast charging time, and a relationship diagram of the radiator different windward area and corresponding charging time is generated to determine whether the structural size of the radiator meets the vehicle layout space according to the relationship diagram.

[0007] If the structural size of the radiator meets the vehicle layout space, it is determined to cool the battery liquid side through the radiator. If the structural size of the radiator does not meet the vehicle layout space, it is determined to cool the battery liquid side through the air conditioner, and a thermodynamic cycle diagram of the air conditioning system is constructed, and the components in the air conditioning system are matched and selected.

[0008] In a possible implementation, the construction of the radiator heat dissipation system simulation model includes the following steps:

[0009] A 1D water pipe model is built.

[0010] A radiator model is built based on the radiator parameters, wherein the radiator parameters include radiator flat tube, fin, length, width, and height.

[0011] A water pump model is built, and the highest speed and displacement of the water pump are defined. The water pump is used to transport the cooling liquid from the radiator to the battery for heat dissipation.

[0012] In a possible implementation, the construction of the thermodynamic cycle diagram of the air conditioning system includes the following steps:

[0013] A refrigerant is selected.

[0014] A compressor compression process is established for compressing the low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas through the compressor.

[0015] A condenser condensation process is established for cooling and condensing the high-temperature and high-pressure refrigerant gas into liquid in the condenser.

[0016] An expansion valve throttling process is established for sending the refrigerant into the evaporator for circulation through the expansion valve.

[0017] An evaporator evaporation heat absorption process is established for changing the refrigerant from liquid to low-temperature gas in the evaporator.

[0018] The basic information of the air conditioning system cycle is determined for determining the refrigerant charge and system performance coefficient according to the refrigerating capacity of the evaporator.

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

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

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

[0022] The inlet and outlet boundaries of the condenser generated from the thermodynamic cycle diagram of the air conditioning system are input into the condenser model. Based on the target heat transfer, DOE analysis is performed on the condenser's windward area to determine the condenser's dimensions.

[0023] In one possible implementation, the expansion valve is selected and matched 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 throttling area of ​​the currently selected expansion valve model is analyzed through PI regulation.

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

[0026] The evaporator inlet and outlet boundaries generated from the thermodynamic cycle diagram of the air conditioning system are input into the evaporator model. Based on the target heat exchange, DOE analysis is performed on the evaporator's windward area to determine the evaporator size.

[0027] Secondly, this application provides a battery cooling system matching and selection simulation device, the device comprising:

[0028] The module is used to build an equivalent circuit model based on the battery's physical properties and to build a battery cooling system. The battery side uses a liquid cooling system to cool the battery, and a radiator or air conditioner to cool the liquid side of the battery.

[0029] The simulation module is used to build a simulation model of the radiator cooling system, and to set variables for the structural dimensions of the radiator. It determines the feasibility of the liquid cooling radiator scheme based on the fast charging time, and generates a relationship diagram for different frontal areas of the radiator and corresponding charging times, so as to determine whether the structural dimensions of the radiator meet the overall vehicle layout space based on the relationship diagram.

[0030] The selection module is used to determine whether to cool the battery fluid side through the radiator if the structural dimensions of the radiator meet the overall vehicle layout space; if the structural dimensions of the radiator do not meet the overall vehicle layout space, it determines whether to cool the battery fluid side through the air conditioner. It also constructs a thermodynamic cycle diagram of the air conditioning system and selects matching components for the air conditioning system.

[0031] In a third aspect, the present application provides an electronic device, comprising a processor, a memory and a bus, the memory stores machine readable instructions executable by the processor, when the electronic device is running, the processor communicates with the memory through the bus, and the machine readable instructions are executed by the processor to perform the steps of the battery cooling system matching type simulation method according to the first aspect.

[0032] In a fourth aspect, the present application provides a computer readable storage medium, the computer readable storage medium stores a computer program, when the computer program is run by a processor, the steps of the battery cooling system matching type simulation method according to the first aspect are executed.

[0033] The battery cooling system matching type simulation method, device, equipment and medium provided by the embodiment are based on battery physical parameters to build an equivalent circuit model and a battery cooling system; a radiator heat dissipation system simulation model is constructed, and the structure size of the radiator is set as a variable, the feasibility of the liquid cooling radiator scheme is determined based on the fast charging time, and a relationship diagram of different windward areas of the radiator and corresponding charging times is generated, so as to determine whether the structure size of the radiator meets the vehicle arrangement space according to the relationship diagram; if the structure size of the radiator meets the vehicle arrangement space, it is determined that the battery liquid side is cooled by the radiator; if the structure size of the radiator does not meet the vehicle arrangement space, it is determined that the battery liquid side is cooled by the air conditioner, and a thermodynamic cycle diagram of the air conditioning system is constructed, and the components in the air conditioning system are matched and selected. Therefore, the performance of various cooling schemes can be quickly evaluated and compared through simulation, and the design efficiency is improved; and the performance of the battery cooling system can be optimized, and the reliability and stability of the system are improved. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0035] Figure 1 The flowchart of the battery cooling system matching type simulation method described in an embodiment of the present application;

[0036] Figure 2 The schematic diagram of the radiator heat dissipation system simulation model described in an embodiment of the present application;

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

[0038] Figure 4 A relationship diagram of different windward areas of the heat sink and corresponding charging times in an embodiment of the present application is shown in FIG. 8;

[0039] Figure 5 A comparison diagram of the target mass flow rate of the compressor and the simulation mass flow rate in an embodiment of the present application is shown in FIG. 9;

[0040] Figure 6 A comparison diagram of the target heat dissipation of the condenser and the simulation heat dissipation in an embodiment of the present application is shown in FIG. 10;

[0041] Figure 7 A comparison diagram of the target heat dissipation of the evaporator and the simulation heat dissipation in an embodiment of the present application is shown in FIG. 11;

[0042] Figure 8 A structure block diagram of the matching simulation device of the battery cooling system in an embodiment of the present application is shown in FIG. 12;

[0043] Figure 9 A structure block diagram of the electronic device in an embodiment of the present application is shown in FIG. 13. DETAILED DESCRIPTION

[0044] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be 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 description and illustration, 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 according to the actual proportions. The flowcharts show the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowcharts can not be implemented in sequence, and the steps without logical context relationship can be reversed in sequence or implemented simultaneously. In addition, one or more other operations can be added to the flowcharts or one or more operations can be removed from the flowcharts under the guidance of the content of the present application.

[0045] In addition, the described embodiments are only some of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and indicated in the drawings herein can be arranged and designed in various different 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 claimed present application, but only represents 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 creative labor are within 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 presence of the features declared thereafter, but does not exclude the addition of other features.

[0047] To solve the technical problems in the background art, the 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 and improve the accuracy and reliability of part selection through simulation.

[0048] Referring to the drawings Figure 1 In an embodiment, the application provides a battery cooling system matching selection simulation method, which comprises the following steps:

[0049] S1, an equivalent circuit model is built based on battery physical parameters, and a battery cooling system is built; wherein the battery is cooled by a liquid cooling system, and the battery liquid side is cooled by a radiator or an air conditioner;

[0050] S2, a radiator heat dissipation system simulation model is constructed, and the structure size of the radiator is set as a variable, the feasibility of the liquid cooling radiator scheme is determined based on the fast charging time, and a relationship diagram of different windward areas of the radiator and corresponding charging times is generated, so as to determine whether the structure size of the radiator meets the vehicle layout space according to the relationship diagram;

[0051] S3, if the structure size of the radiator meets the vehicle layout space, it is determined that the battery liquid side is cooled by the radiator; if the structure size of the radiator does not meet the vehicle layout space, it is determined that the battery liquid side is cooled by the air conditioner, and a thermodynamic cycle diagram of the air conditioning system is constructed, and the matching selection of the parts in the air conditioning system is performed.

[0052] Specifically, in step S1, an equivalent circuit model is built based on the used battery physical parameters, the battery cooling demand power 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, the battery is cooled by a liquid cooling system, and the battery liquid side is cooled by a radiator or an air conditioning system.

[0053] Since the radiator has lower energy consumption than the air conditioning system, in step S2, the radiator cooling is selected first. The liquid cooling radiator is a commonly used battery cooling method, which uses liquid (usually cooling liquid) 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, transfers heat along the surface or inside of the battery, absorbs the heat generated by the battery when the liquid flows through the battery, and then carries the heat to the radiator, where the liquid exchanges heat with the surrounding environment (usually air) to release heat to the environment, and then circulates back to the battery to continue absorbing heat, completing the cycle of cooling process.

[0054] The liquid cooling radiator battery cooling method has the advantages of high heat dissipation efficiency, good stability, strong controllability, low cost, etc., and is particularly suitable for high-power battery systems with high requirements for heat dissipation performance, such as electric vehicles, battery energy storage systems, etc. 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 accompanying drawings Figure 2 In an embodiment, the simulation model of the radiator heat dissipation system is constructed in the following way:

[0055] A 1D water pipe model is built. In order to build the 1D water pipe model more accurately and quickly, the 3D digital model can be directly imported into the 1D simulation model, and the 1D pipe model can be automatically generated after import;

[0056] A radiator model is built. The liquid cooling radiator is usually composed of flat tubes, fins and other heat dissipation channels. Flat tubes, fins and other structures are used for cooling liquid flow in the radiator and increase the heat dissipation area to improve the heat dissipation efficiency. The model can be built based on the existing radiator parameters, and the parameters of the radiator flat tube, fin, length, width, etc. are input;

[0057] A water pump model is built. The water pump is usually used to transport cooling liquid from the radiator to the equipment (such as battery, engine, etc.) that needs to be cooled to achieve the purpose of heat dissipation. In this application, the flow demand of the water outlet system is analyzed, so see the accompanying drawings Figure 3 , only the speed and displacement of the water pump are defined.

[0058] In addition, it should be noted that selecting a suitable cooling liquid is an important consideration in the design of a liquid cooling radiator. Commonly used cooling liquids include water, ethylene glycol solution and special coolants. The selection of cooling liquid should consider its thermal conductivity, corrosion resistance, freezing point, boiling point and other factors. In this embodiment, a 50% ethylene glycol mixture is used.

[0059] Further, in step S2, based on the existing radiator model, the structural size of the radiator is set as a variable, the influence of changing the windward area of the radiator on the battery cooling and fast charging performance is analyzed, and the feasibility of the liquid cooling radiator scheme is determined based on the target fast charging time. In an embodiment, whether the structural size of the radiator meets the vehicle layout space is determined by generating a relationship diagram for different windward areas of the radiator and corresponding charging times, as shown in the accompanying drawings Figure 4 , the horizontal line in the figure represents the target fast charging time of the battery, and the round 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 vehicle layout space is large and the corresponding structural size of the radiator can be installed, the cooling scheme is determined as radiator cooling; if the vehicle layout space is small and the oversized radiator cannot meet the installation requirements of the vehicle layout space, the cooling scheme is determined as air conditioning cooling. The automobile air conditioning system has the advantages of precise temperature control ability, high-efficiency heat dissipation efficiency, stable performance and reliability, etc., which can improve the performance and service life of the battery pack, reduce the maintenance cost, and improve the reliability and safety of the system. In step S3, the air conditioning system thermodynamic cycle diagram (pressure-enthalpy diagram, temperature-entropy diagram) is established based on the design target. The design and component matching selection of the air conditioning system are based on the cycle, and the following process shows the basic working principle of the air conditioning system:

[0061] Selecting a refrigerant, since the (GWP) global warming potential of R1234yf is lower than that of R134a refrigerant, R134a is being gradually replaced, and R1234fy is used for thermodynamic cycle analysis in this embodiment;

[0062] Establishing the compression process of the compressor, the compressor compresses the low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure gas, which increases the temperature and pressure of the refrigerant. In this embodiment, the compressor inlet condition is defined according to the evaporator (chiller) outlet temperature and the superheat degree. In order to enable the air conditioning system to produce better refrigeration effect, the Tr temperature value is as small as possible, and therefore the △T needs to be as large as possible, wherein:

[0063] Tr = Tc - △T;

[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: temperature difference between chiller coolant side and refrigerant side (as large as possible);

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

[0068] A condenser condensing process is established, in which high-temperature and high-pressure refrigerant gas is cooled and condensed into liquid. In this process, the heat released by the refrigerant is transferred to the external environment, causing the air temperature to rise. The present embodiment takes the temperature and density value of the refrigerant at the outlet of the compressor as the inlet conditions of the condenser, and the outlet pressure of the condenser remains consistent with the outlet pressure of the compressor (without considering pressure drop). Under high-temperature conditions in summer, excessive supercooling of the condenser can cause the system pressure to rise, ultimately affecting the normal operation of the system. Therefore, it is necessary to reasonably control the supercooling degree of the condenser to ensure the normal operation of the system and prolong the service life of the equipment;

[0069] An expansion valve throttling process is established, which 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 temperature and density value of the refrigerant at the outlet of the condenser are taken as the inlet conditions of the expansion valve, and the outlet pressure and enthalpy of the expansion valve remain consistent with the inlet conditions of the compressor;

[0070] An evaporator (chiller) evaporation and heat absorption process is established, in which the refrigerant (usually liquid) changes from a low-pressure state to a low-temperature gas, absorbs heat from the surrounding environment, and lowers the air temperature. The low-temperature air is sent into the passenger cabin through a blower and air duct to cool the occupants. In this example, the temperature and density value of the refrigerant at the outlet of the expansion valve are taken as the inlet conditions of the evaporator, and the outlet pressure and density of the evaporator remain consistent with the inlet conditions of the compressor;

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

[0072] Further, after the air conditioning system thermodynamic cycle diagram is completed, the components of the air conditioning system also need to be selected.

[0073] Compressor selection: input the inlet and outlet boundaries of the compressor generated in the air conditioning system thermodynamic cycle diagram into the compressor model, and based on the target mass flow rate, analyze the required speed of the currently selected compressor through PI adjustment. The comparison results of the target mass flow rate and the simulation mass flow rate are shown in the accompanying drawings of the specification. Figure 5

[0074] Condenser selection: input the inlet and outlet boundaries of the condenser generated in the air conditioning system thermodynamic cycle diagram into the condenser model, and based on the target heat transfer amount, perform DOE analysis on the condenser windward area to determine the appropriate condenser size. The comparison results of the target heat dissipation amount and the simulation heat dissipation amount are shown in the accompanying drawings of the specification. Figure 6

[0075] ​​The selection of the expansion valve, the inlet and outlet boundary generated in the thermodynamic cycle diagram of the air conditioning system is input to the expansion valve model, and the required flow area of the currently selected expansion valve is analyzed based on the target pressure drop and mass flow through PI regulation;

[0076] The selection of the chiller, the inlet and outlet boundary generated in the thermodynamic cycle diagram of the air conditioning system is input to the chiller model, and the appropriate chiller size (width, number of channels, etc.) is determined based on the target heat exchange amount. The comparison results of the chiller target heat dissipation amount and the simulation heat dissipation amount are shown in the accompanying drawings of the specification, and the selection of the components of the air conditioning cooling system is completed. Figure 7

[0077] The battery cooling system matching selection simulation method provided by the application can quickly evaluate and compare the performance of multiple cooling schemes, thereby helping to quickly determine the optimal design scheme, find problems and optimize in the design stage, and improve the design efficiency; and the performance of the battery cooling system can be optimized comprehensively through simulation, including reducing the battery temperature, improving the cooling efficiency, reducing the system cost, etc., improving the reliability and stability of the system.

[0078] As shown in the accompanying drawings of the specification, Figure 8 The application also provides a battery cooling system matching selection simulation device, which comprises:

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

[0080] The simulation module 802 is used to build a radiator heat dissipation system simulation model, and set the structure size of the radiator as a variable, determine the feasibility of the liquid cooling radiator scheme based on the fast charging time, and generate a relationship diagram of different windward areas of the radiator and corresponding charging times, so as to determine whether the structure size of the radiator meets the vehicle layout space 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 structure size of the radiator meets the vehicle layout space, and to determine that the battery liquid side is cooled by the air conditioner if the structure size of the radiator does not meet the vehicle layout space, and to build a thermodynamic cycle diagram of the air conditioning system and to match and select the components in the air conditioning system.

[0082] ​In some embodiments, the simulation module 802 constructs a radiator heat dissipation 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 cooling liquid from the radiator to the battery for heat dissipation.

[0083] In some embodiments, the selection module 803 constructs an air conditioning system thermodynamic cycle diagram, including: selecting a 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 a condenser; establishing an expansion valve throttling process for sending refrigerant into an evaporator through an expansion valve for circulation; establishing an evaporator evaporation heat absorption process for changing the refrigerant from a liquid to a low-temperature gas in an evaporator; determining air conditioning system cycle basic information for determining refrigerant charge and system performance coefficient according to the refrigerating capacity of the evaporator.

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

[0085] In some embodiments, the selection module 803 includes condenser matching selection, including: inputting the inlet and outlet boundary of the condenser generated in the air conditioning system thermodynamic cycle diagram into the condenser model, and performing DOE analysis on the condenser windward area based on the target heat exchange amount to determine the size of the condenser.

[0086] In some embodiments, the selection module 803 includes expansion valve matching selection, including: inputting the inlet and outlet boundary of the expansion valve generated in the air conditioning system thermodynamic cycle diagram into the expansion valve model, and analyzing the current selected expansion valve flow area based on the target pressure drop and mass flow through PI adjustment.

[0087] In some embodiments, the selection module 803 includes evaporator matching selection, including: inputting the inlet and outlet boundary of the evaporator generated in the air conditioning system thermodynamic cycle diagram into the evaporator model, and performing DOE analysis on the evaporator windward area based on the target heat exchange amount to determine the size of the evaporator.

[0088] The battery cooling system matching selection simulation device provided by the application builds an equivalent circuit model based on battery physical parameters through a building module, and builds a battery cooling system; a radiator heat dissipation system simulation model is constructed through a simulation module, and the structure size of the radiator is set as a variable, the feasibility of the liquid cooling radiator scheme is determined based on the fast charging time, and a relationship diagram of different windward areas of the radiator and corresponding charging times is generated, so as to determine whether the structure size of the radiator meets the vehicle arrangement space according to the relationship diagram; if the structure size of the radiator meets the vehicle arrangement space, the battery liquid side is cooled through the radiator by the selection module; if the structure size of the radiator does not meet the vehicle arrangement space, the battery liquid side is cooled through the air conditioner by the selection module, and a thermodynamic cycle diagram of the air conditioning system is constructed, and the components in the air conditioning system are matched and selected. Therefore, the performance of various cooling schemes can be quickly evaluated and compared through simulation, and the design efficiency is improved; and the performance of the battery cooling system can be optimized, and the reliability and stability of the system are improved.

[0089] Based on the same concept of the application, the specification attached Figure 9 As shown in the structure of the electronic device 900 provided by the embodiments of the application, the electronic device 900 comprises 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 the components. The electronic device 900 can optionally comprise a user interface 903, including a display (for example, a touch screen, an LCD, a CRT, holographic imaging (Holographic) or a projector (Projector), etc.), a keyboard or a clicking device (for example, a mouse, a trackball, a touchpad or a touch screen, etc.).

[0090] The memory 905 can comprise a read-only memory and a random access memory, and provide instructions and data for the processor 901. A part of the memory 905 can also comprise a non-volatile random access memory (NVRAM).

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

[0092] The operating system 9051 comprises various system programs, used to realize various basic services and process hardware-based tasks;

[0093] The application program module 9052 comprises various application programs, for example, a desktop (launcher), a media player (MediaPlayer), a browser (Browser), etc., used to realize various application services.

[0094] In the embodiments of the present application, the processor 901 is configured to execute the steps in the battery cooling system matching and selection simulation method by invoking the program or instructions stored in the memory 905. The design efficiency of the battery cooling system can be improved by simulation, and the accuracy and reliability of part selection can be improved.

[0095] The present application also provides a computer readable storage medium, which stores a computer program. When the computer program is run 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 battery cooling system matching and selection simulation method described above 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 only schematic. For example, the division of the units is only a logical function division. In actual implementation, other division manners can be adopted. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some communication interfaces. The coupling or communication connection can be electrical, mechanical or in other forms.

[0098] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. According to actual needs, some or all of the units can be selected to achieve the purpose of the embodiments.

[0099] In addition, each functional unit in the embodiments provided in the present application can be integrated in one processing unit, or each unit can be a physically independent unit, or two or more units can be integrated in one unit.

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

[0101] Finally, it should be noted that: the above embodiments are only specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit them. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily think of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed by the present application, or replace some technical features with equivalent ones. The modification, change or replacement does not make the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the present application. They should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A battery cooling system matching selection simulation method, characterized in that, The method comprises the following steps: An equivalent circuit model is built based on battery physical parameters, and a battery cooling system is built; wherein the battery side is cooled by a liquid cooling system, and the battery liquid side is cooled by a radiator or an air conditioner; A radiator heat dissipation system simulation model is constructed, and the structure size of the radiator is set as a variable. The feasibility of the liquid cooling radiator scheme is determined based on the fast charging time, and a relationship diagram of the radiator different windward area and the corresponding charging time is generated to determine whether the structure size of the radiator meets the vehicle layout space according to the relationship diagram. The construction of the radiator heat dissipation system simulation model comprises the following steps: a 1D water pipe model is built; a radiator model is built based on the radiator parameters; wherein the radiator parameters include radiator flat tube, fin, length, width and height; a water pump model is built, and the highest speed and displacement of the water pump are defined; wherein the water pump is used to transport the cooling liquid from the radiator to the battery for heat dissipation; If the structure size of the radiator meets the vehicle layout space, it is determined that the battery liquid side is cooled by the radiator; if the structure size of the radiator does not meet the vehicle layout space, it is determined that the battery liquid side is cooled by the air conditioner, and an air conditioner system thermodynamic cycle diagram is constructed, and the components in the air conditioner system are matched and selected; the construction of the air conditioner system thermodynamic cycle diagram comprises the following steps: a refrigerant is selected; a compressor compression process is established for compressing the low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas by the compressor; a condenser condensation process is established for cooling and condensing the high-temperature and high-pressure refrigerant gas into liquid in the condenser; an expansion valve throttling process is established for sending the refrigerant into the evaporator for circulation by the expansion valve; an evaporator evaporation heat absorption process is established for changing the refrigerant from liquid to low-temperature gas in the evaporator; the basic information of the air conditioner system cycle is determined for determining the refrigerant charge and the system performance coefficient according to the refrigerating capacity of the evaporator; wherein the compressor is matched and selected by the following method: the compressor inlet and outlet boundary generated in the air conditioner system thermodynamic cycle diagram is input into the compressor model, the current selected compressor speed is analyzed based on the target mass flow by PI adjustment; the expansion valve is matched and selected by the following method: the inlet and outlet boundary of the expansion valve generated in the air conditioner system thermodynamic cycle diagram is input into the expansion valve model, the current selected expansion valve flow area is analyzed based on the target pressure drop and mass flow by PI adjustment; the evaporator is matched and selected by the following method: the evaporator inlet and outlet boundary generated in the air conditioner system thermodynamic cycle diagram is input into the evaporator model, the evaporator windward area is analyzed by DOE based on the target heat exchange amount to determine the size of the evaporator.

2. A battery cooling system matching selection simulation device, characterized by, The device comprises: A building module is configured to build an equivalent circuit model based on battery physical parameters, and build a battery cooling system; wherein the battery side is cooled by a liquid cooling system, and the battery liquid side is cooled by a radiator or an air conditioner; The simulation module is used for constructing a radiator heat dissipation system simulation model, setting a variable of a structure size of the radiator, determining the feasibility of a liquid-cooled radiator scheme based on a fast charging time, and generating a relationship diagram of different windward areas of the radiator and corresponding charging times, so as to determine whether the structure size of the radiator meets a vehicle arrangement space according to the relationship diagram. The construction of the radiator heat dissipation system simulation model includes the following steps: 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 a highest rotating speed and a displacement of the water pump; wherein the water pump is used for transporting cooling liquid from the radiator to the battery for heat dissipation; The selection module is used for determining that the battery is cooled by the radiator on a liquid side if the structure size of the radiator meets the vehicle arrangement space, and determining that the battery is cooled by an air conditioner on the liquid side if the structure size of the radiator does not meet the vehicle arrangement space, and constructing an air conditioner system thermodynamic cycle diagram and matching and selecting parts in the air conditioner system. The construction of the air conditioner system thermodynamic cycle diagram includes the following steps: selecting a refrigerant; establishing a compressor compression process for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas by a compressor; establishing a condenser condensation process for cooling and condensing the high-temperature and high-pressure refrigerant gas into liquid in a condenser; establishing an expansion valve throttling process for sending the refrigerant into an evaporator for circulation by an expansion valve; establishing an evaporator evaporation heat absorption process for changing the refrigerant from liquid into low-temperature gas in the evaporator; determining air conditioner system cycle basic information for determining refrigerant charging quantity and system performance coefficient according to the refrigerating capacity of the evaporator; wherein the compressor is matched and selected by the following way: inputting the generated compressor inlet and outlet boundary in the air conditioner system thermodynamic cycle diagram into a compressor model, analyzing the rotating speed of the currently selected compressor model based on target mass flow by PI adjustment; the expansion valve is matched and selected by the following way: inputting the generated expansion valve inlet and outlet boundary in the air conditioner system thermodynamic cycle diagram into an expansion valve model, analyzing the flow area of the currently selected expansion valve model based on target pressure drop and mass flow by PI adjustment; the evaporator is matched and selected by the following way: inputting the generated evaporator inlet and outlet boundary in the air conditioner system thermodynamic cycle diagram into an evaporator model, determining the size of the evaporator based on target heat exchange amount for DOE analysis of the windward area of the evaporator.

3. An electronic device, comprising: Comprising: A processor, a memory, and a bus, the memory stores machine readable instructions executable by the processor, when the electronic device is running, the processor and the memory communicate through the bus, the machine readable instructions are executed by the processor to perform the steps of the battery cooling system matching and selection simulation method of claim 1.

4. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, which is executed by the processor to perform the steps of the battery cooling system matching and selection simulation method of claim 1.

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