System and method for simulating thermal management of whole vehicle

Abstract

The invention discloses a whole vehicle thermal management simulation system and method, and relates to the technical field of automobiles. The system comprises a first loop, a second loop and a third loop, the first loop comprises a compressor, a variable pressure reducing valve, a condenser, an evaporator and a heat exchanger; the second loop comprises a motor water pump, a battery water pump, a three-way valve, a four-way valve, a positive temperature coefficient heater, a battery module, a heat exchanger and a variable pressure reducing valve; the third loop comprises a fan, an evaporator, a heat exchanger, a passenger compartment and a variable pressure reducing valve; wherein the first loop and the second loop are connected to the heat exchanger, the first loop and the third loop are connected to the heat exchanger and the evaporator, and the second loop and the third loop are connected to the heat exchanger; the third loop is an air loop; the number of the variable pressure reducing valves is multiple, and the system is used for taking the variable pressure reducing valves as stop valves in response to receiving the first physical signal and taking the variable pressure reducing valves as electronic expansion valves in response to receiving the second physical signal.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, specifically to technical fields such as electric vehicle simulation testing technology, and particularly to a system and method for whole vehicle thermal management simulation. Background Art

[0002] At present, the thermal management simulation of electric vehicles often adopts the scheme of computational fluid dynamics (CFD) simulation analysis and theoretical calculation analysis. This scheme can generally be divided into four stages: CAD model, meshing, calculation solution and post-processing.

[0003] However, using CFD for thermal management analysis requires a lot of time and manpower costs, and CFD has a long calculation time, requires a huge amount of stored data, and has poor portability. Summary of the invention

[0004] The present application provides a system and method for vehicle thermal management simulation, which can solve the problem of high resource consumption in thermal management simulation processing of electric vehicles. The technical solution is as follows:

[0005] In a first aspect, a system for vehicle thermal management simulation is provided, the system comprising:

[0006] A first loop, a second loop, and a third loop;

[0007] The first circuit includes a compressor, a variable pressure reducing valve, a condenser, an evaporator, and a heat exchanger;

[0008] The second circuit includes a motor water pump, a battery water pump, a three-way valve, a four-way valve, a positive temperature coefficient PTC heater, a battery module, a heat exchanger, and a variable pressure reducing valve;

[0009] The third circuit includes a fan, an evaporator, a heat exchanger, a passenger compartment, and a variable pressure reducing valve;

[0010] Wherein, the first circuit and the second circuit are connected to the heat exchanger, the first circuit and the third circuit are connected to the heat exchanger and the evaporator, and the second circuit and the third circuit are connected to the heat exchanger; the first circuit is a refrigerant medium circuit, the second circuit is a coolant circuit, and the third circuit is an air circuit;

[0011] There are multiple variable pressure reducing valves, and the system is used to operate the variable pressure reducing valves as stop valves in response to receiving a first physical signal, and to operate the variable pressure reducing valves as electronic expansion valves in response to receiving a second physical signal.

[0012] In a possible implementation, there are multiple heat exchangers, and the heat exchangers of the first circuit include a first heat exchanger, a second heat exchanger, and a fourth heat exchanger;

[0013] The variable pressure reducing valve of the first circuit includes a first stop valve, a second stop valve, a third stop valve, a fourth stop valve, a first electronic expansion valve and a second electronic expansion valve;

[0014] The heat exchanger of the third circuit includes a third heat exchanger and a fourth heat exchanger;

[0015] The variable pressure reducing valve of the third circuit includes a fifth stop valve, a sixth stop valve, and a seventh stop valve;

[0016] Wherein, the first circuit and the third circuit are connected to the fourth heat exchanger and the evaporator.

[0017] In one possible implementation, the system is specifically used to open the first stop valve, the second stop valve, the sixth stop valve, and the first electronic expansion valve, and close the third stop valve, the fifth stop valve, and the seventh stop valve in response to receiving a passenger compartment cooling mode simulation instruction.

[0018] In one possible implementation, the system is specifically used to open the third stop valve, the fourth stop valve, the seventh stop valve, and the second electronic expansion valve, and close the first stop valve, the second stop valve, the fifth stop valve, the sixth stop valve, and the first electronic expansion valve in response to receiving a simulation instruction for the passenger compartment heat pump heating mode.

[0019] In a possible implementation, the number of the three-way valves is multiple, and the three-way valve of the second circuit includes a first three-way valve and a second three-way valve;

[0020] The heat exchanger of the second circuit includes a first heat exchanger, a second heat exchanger, a third heat exchanger, and a fifth heat exchanger;

[0021] The first circuit and the second circuit are connected to the first heat exchanger and the second heat exchanger, and the second circuit and the third circuit are connected to the third heat exchanger.

[0022] In a possible implementation, the system is specifically configured to, in response to receiving a battery cooling mode simulation instruction, open the first shut-off valve, the battery water pump, and the second electronic expansion valve, and set the four-way valve to a battery cooling circuit connection state.

[0023] In one possible implementation, the system is specifically configured to, in response to receiving a motor cooling mode simulation instruction, open the motor water pump and set the first three-way valve, the second three-way valve, and the four-way valve to a motor cooling circuit connection state.

[0024] In one possible implementation, the system is specifically used to, in response to receiving a passenger compartment PTC heating mode simulation instruction, open the motor water pump, PTC heater, and fifth stop valve, close the sixth stop valve and the seventh stop valve, and set the first three-way valve, the second three-way valve, and the four-way valve to the PTC connection state.

[0025] In a possible implementation, the second circuit further includes a motor cooling circuit, a motor water tank, and a battery water tank;

[0026] The motor cooling circuit is arranged between the first three-way valve and the second three-way valve, the motor water tank is connected to the motor water pump, and the battery water tank is connected to the battery water pump.

[0027] In a second aspect, a method for simulating thermal management of a vehicle is provided, the method comprising:

[0028] Obtain historical parameter information of vehicle thermal management;

[0029] Based on the historical parameter information, construct a vehicle thermal management simulation system as claimed in any one of the above aspects and implementation methods;

[0030] In response to receiving the simulation instruction of the configured target mode, the whole vehicle thermal management simulation system performs simulation processing based on the simulation instruction of the target mode to obtain simulation data of the target mode.

[0031] The beneficial effects of the technical solution provided by this application include at least:

[0032] It can be seen from the above technical solution that the vehicle thermal management simulation system in the embodiment of the present application may include a first loop, a second loop, and a third loop. The first circuit includes a compressor, a variable pressure reducing valve, a condenser, an evaporator, and a heat exchanger; the second circuit includes a motor water pump, a battery water pump, a three-way valve, a four-way valve, a PTC heater, a battery module, a heat exchanger, and a variable pressure reducing valve; the third circuit includes a fan, an evaporator, a heat exchanger, a passenger compartment, and a variable pressure reducing valve; wherein the first circuit and the second circuit are connected to the heat exchanger, the first circuit and the third circuit are connected to the heat exchanger and the evaporator, and the second circuit and the third circuit are connected to the heat exchanger; the first circuit is a refrigerant medium circuit, the second circuit is a coolant circuit, and the third circuit is an air circuit; the number of the variable pressure reducing valves is multiple, and the system is used to use the variable pressure reducing valve as a shut-off valve in response to receiving a first physical signal, and to use the variable pressure reducing valve as an electronic expansion valve in response to receiving a second physical signal. Since the vehicle thermal management simulation system constructs multiple simulation circuit modules of different thermal management modes / operating conditions, and a variable pressure reducing valve that can be used to simulate a shut-off valve and an electronic expansion valve, the simulation cycle can be effectively shortened through modular simulation processing and adjustment, and the versatility and flexibility of the vehicle thermal management simulation system can be improved.

[0033] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 is a schematic diagram of a vehicle thermal management simulation system provided by an embodiment of the present application;

[0036] Figure 2 is a schematic diagram of a vehicle thermal management simulation system provided by another embodiment of the present application;

[0037] Figure 3 is a schematic diagram of a simulation model of a vehicle thermal management simulation system provided by another embodiment of the present application;

[0038] Figure 4 It is a flow chart of a method for vehicle thermal management simulation provided in yet another embodiment of the present application. DETAILED DESCRIPTION

[0039] The following is a description of exemplary embodiments of the present application in conjunction with the accompanying drawings, including various details of the embodiments of the present application to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0040] Obviously, the described embodiments are only part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0041] It should be noted that the terminal devices involved in the embodiments of the present application may include but are not limited to mobile phones, personal digital assistants (PDAs), wireless handheld devices, tablet computers and other smart devices; display devices may include but are not limited to personal computers, televisions and other devices with display functions.

[0042] In addition, the term "and / or" in this article is only a description of the association relationship between the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0043] Please refer to Figure 1 , which shows a schematic diagram of a vehicle thermal management simulation system provided by an embodiment of the present application. The vehicle thermal management simulation system 100 may specifically include a first loop 10 , a second loop 11 , and a third loop 12 .

[0044] Optionally, the first circuit 10 may include a compressor 101 , a variable pressure reducing valve 102 , a condenser 103 , an evaporator 104 , and a heat exchanger 105 .

[0045] The second circuit 11 includes a motor water pump 110 , a battery water pump 111 , a three-way valve 112 , a four-way valve 113 , a positive temperature coefficient PTC heater 114 , a battery module 115 , a heat exchanger 105 , and a variable pressure reducing valve 116 .

[0046] The third circuit 12 includes a fan 120 , an evaporator 104 , a heat exchanger 105 , a passenger compartment 121 , and a variable pressure reducing valve 122 .

[0047] Here, the first circuit 10 and the second circuit 11 can be connected to the heat exchanger 105, the first circuit 10 and the third circuit 12 can be connected to the evaporator 104 and the heat exchanger 105, and the second circuit 11 and the third circuit 12 can be connected to the heat exchanger; the first circuit 10 is a refrigerant medium circuit, the second circuit 11 is a coolant circuit, and the third circuit 12 is an air circuit.

[0048] Optionally, there are multiple variable pressure reducing valves, and the system is used to use the variable pressure reducing valve as a shut-off valve in response to receiving a first physical signal, and to use the variable pressure reducing valve as an electronic expansion valve in response to receiving a second physical signal.

[0049] It should be noted that the variable pressure reducing valve can simulate the stop valve by using the first physical signal. The signal value of the first physical signal can be 1 or 0. The signal value of the first physical signal 1 can indicate that the stop valve is opened, and the signal value of the first physical signal 0 can indicate that the stop valve is closed.

[0050] It should be noted that, by using the second physical signal, the variable pressure reducing valve can simulate the electronic expansion valve. The signal value of the second physical signal can represent the opening of the expansion valve, and the signal value range is 0 to the opening value. Max The opening value can be determined according to the actual mode to be simulated.

[0051] Optionally, in a possible implementation of this embodiment, the number of the heat exchangers may be multiple. The heat exchanger of the first circuit may include a first heat exchanger, a second heat exchanger, and a fourth heat exchanger. The variable pressure reducing valve of the first circuit may include a first stop valve, a second stop valve, a third stop valve, a fourth stop valve, a first electronic expansion valve, and a second electronic expansion valve. The heat exchanger of the third circuit may include a third heat exchanger and a fourth heat exchanger. The variable pressure reducing valve of the third circuit includes a fifth stop valve, a sixth stop valve, and a seventh stop valve. Wherein, the first circuit and the third circuit are connected to the fourth heat exchanger and the evaporator.

[0052] In an implementation, the fourth stop valve may be a heat pump circuit stop valve, the first electronic expansion valve may be an evaporator electronic expansion valve, and the second electronic expansion valve may be a battery electronic expansion valve.

[0053] In an implementation, the fifth stop valve may be a PTC warm air channel stop valve, the sixth stop valve may be a cold air channel stop valve, and the seventh stop valve may be a heat pump warm air channel stop valve.

[0054] In a specific implementation process of this implementation method, the vehicle thermal management simulation system can be used to open the first stop valve, the second stop valve, the sixth stop valve, and the first electronic expansion valve in response to receiving a passenger compartment cooling mode simulation instruction, and to open the third stop valve, the fifth stop valve, and the seventh stop valve.

[0055] In the specific implementation process, the passenger compartment cooling mode simulation instruction may be obtained based on the operator's selection operation of the configuration control on the configuration page. The passenger compartment cooling mode simulation instruction may include parameter information of the configured passenger compartment cooling mode.

[0056] In one case of the specific implementation process, the vehicle thermal management simulation system can be specifically used to open the first stop valve, the second stop valve, the cold air channel stop valve, and the evaporator electronic expansion valve, and close the third stop valve, the PTC warm air channel stop valve, and the heat pump warm air channel stop valve based on the configured parameter information of the passenger compartment cooling mode when a simulation instruction for the passenger compartment cooling mode is received.

[0057] In another specific implementation process of this implementation method, the vehicle thermal management simulation system is specifically used to open the third stop valve, the fourth stop valve, the seventh stop valve, and the second electronic expansion valve in response to receiving a simulation instruction for the passenger compartment heat pump heating mode, and to close the first stop valve, the second stop valve, the fifth stop valve, the sixth stop valve, and the first electronic expansion valve.

[0058] In this specific implementation process, the passenger compartment heat pump heating mode simulation instruction may also be obtained based on the operator's selection operation of the configuration control of the configuration page. The passenger compartment heat pump heating mode simulation instruction may include parameter information of the configured passenger compartment heat pump heating mode.

[0059] One scenario of the specific implementation process is that the vehicle thermal management simulation system can be specifically used to open the third stop valve, heat pump circuit stop valve, heat pump warm air channel stop valve, and battery electronic expansion valve based on the configured parameter information of the passenger compartment heat pump heating mode when receiving a simulation instruction for the passenger compartment heat pump heating mode, and close the first stop valve, the second stop valve, the PTC warm air channel stop valve, the cold air channel stop valve, and the evaporator electronic expansion valve.

[0060] In another specific implementation process of this implementation, the number of the three-way valves can be multiple, and the three-way valve of the second circuit can include a first three-way valve and a second three-way valve. The heat exchanger of the second circuit includes a first heat exchanger, a second heat exchanger, a third heat exchanger, and a fifth heat exchanger. The first circuit and the second circuit are connected to the first heat exchanger and the second heat exchanger, and the second circuit and the third circuit are connected to the third heat exchanger.

[0061] In one case of the specific implementation process, the first circuit and the second circuit may also be connected to a fifth heat exchanger.

[0062] Preferably, the vehicle thermal management simulation system may further include a fourth loop, through which the condenser of the first loop and the fifth heat exchanger of the second loop pass. Here, the fourth loop may also be an air loop.

[0063] In this implementation, the connection state of the three-way valve can be adjusted by the third physical signal.

[0064] Exemplarily, the three-way valve may include interfaces A, B, and C, and K may be the maximum stroke of the valve core of the three-way valve. When the signal value of the third physical signal is 0, AC is connected; when the signal value of the third physical signal is 1, AB is connected.

[0065] In this implementation, the connection state of the four-way valve can be adjusted by the fourth physical signal.

[0066] For example, the four-way valve may include A, B, C, and D interfaces, and K may be the maximum stroke value of the valve core of the four-way valve. When the signal value of the third physical signal is 0, AD is connected and BC is connected; when the physical signal is 1, AB is connected and CD is connected.

[0067] In another specific implementation process of this implementation method, the vehicle thermal management simulation system can be specifically used to open the first shut-off valve, the battery water pump, and the second electronic expansion valve in response to receiving a battery cooling mode simulation instruction, and set the four-way valve to a battery cooling circuit connection state.

[0068] In this specific implementation process, the battery cooling mode simulation instruction may also be obtained based on the operator's selection operation of the configuration control on the configuration page. The battery cooling mode simulation instruction may include parameter information of the configured battery cooling mode.

[0069] Here, the four-way valve may include A, B, C, and D ports.

[0070] One scenario of the specific implementation process is that the vehicle thermal management simulation system can be specifically used to open the first shut-off valve, the battery water pump, and the battery electronic expansion valve based on the parameter information of the configured battery cooling mode when receiving a battery cooling mode simulation instruction, and set the interface of the four-way valve to AD connection and BC connection to set the battery cooling circuit to a connected state.

[0071] In another specific implementation process of this implementation method, the vehicle thermal management simulation system can be specifically used to respond to receiving a motor cooling mode simulation instruction, open the motor water pump, and set the first three-way valve, the second three-way valve, and the four-way valve to the motor cooling circuit connection state.

[0072] In the specific implementation process, the motor cooling mode simulation instruction may also be obtained based on the operator's selection operation on the configuration control of the configuration page. The motor cooling mode simulation instruction may include parameter information of the configured motor cooling mode.

[0073] Here, the three-way valve may include interfaces A, B, and C. The four-way valve may include interfaces A, B, C, and D.

[0074] In one case of the specific implementation process, the vehicle thermal management simulation system can be specifically used to respond to receiving a motor cooling mode simulation instruction, open the motor water pump based on the parameter information of the configured motor cooling mode, and set the first three-way valve to AB connection, the second three-way valve to AB connection, and the four-way valve to AD connection and BC connection, so as to set the motor cooling circuit to a connected state.

[0075] In another specific implementation process of this implementation method, the system is specifically used to respond to receiving a passenger compartment PTC heating mode simulation instruction, open the motor water pump, PTC heater, and the fifth stop valve, close the sixth stop valve and the seventh stop valve, and set the first three-way valve, the second three-way valve, and the four-way valve to the PTC connection state.

[0076] In the specific implementation process, the passenger compartment PTC heating mode simulation instruction may also be obtained based on the operator's selection operation of the configuration control of the configuration page. The passenger compartment PTC heating mode simulation instruction may include parameter information of the configured passenger compartment PTC heating mode.

[0077] In this specific implementation process, the fifth stop valve may be a PTC warm air channel stop valve, the sixth stop valve may be a cold air channel stop valve, and the seventh stop valve may be a heat pump warm air channel stop valve.

[0078] Here, the three-way valve may include interfaces A, B, and C. The four-way valve may include interfaces A, B, C, and D.

[0079] In one case of this specific implementation process, the vehicle thermal management simulation system can be specifically used to respond to receiving a simulation instruction for the passenger compartment PTC heating mode, and based on the parameter information of the passenger compartment PTC heating mode, open the motor water pump, PTC heater, and PTC warm air channel shut-off valve, close the cold air channel shut-off valve and the heat pump warm air channel shut-off valve, and set the first three-way valve to AB connection or AC connection, the second three-way valve to AC connection, and the four-way valve to AD connection and BC connection, so as to set them to the PTC connection state.

[0080] Optionally, in a possible implementation of this embodiment, the second circuit may also include a motor cooling circuit, a motor water tank, and a battery water tank.

[0081] Here, the motor cooling circuit is arranged between the first three-way valve and the second three-way valve, the motor water tank is connected to the motor water pump, and the battery water tank is connected to the battery water pump.

[0082] Optionally, in a possible implementation of this embodiment, the vehicle thermal management simulation system may be constructed using SimScap based on historical parameter information of vehicle thermal management.

[0083] In this way, the whole vehicle thermal management simulation system can simulate the compressor inlet and outlet pressure temperature and refrigerant flow, passenger compartment temperature changes, battery motor temperature changes, three-way valve opening, four-way valve opening, stop valve opening, electronic expansion valve opening and coolant flow in the pipeline. The whole vehicle thermal management simulation system can switch between passenger compartment cooling, battery cooling, motor cooling, passenger compartment PTC heating and passenger compartment heat pump heating modes by controlling the opening state of different stop valves, quickly analyze the thermal management effect of the whole vehicle, and reduce the development cycle. In addition, a variable pressure reducing valve can be used to simulate an electronic expansion valve to achieve the throttling and pressure reduction function of the refrigerant.

[0084] Figure 2 This is a schematic diagram of the structure of a vehicle thermal management simulation system provided by another embodiment of the present application. In order to better understand the system of the embodiment of the present application, the following is a schematic diagram of the structure of a vehicle thermal management simulation system provided by another embodiment of the present application. Figure 2 The system of the embodiment of the present application is described with reference to specific application scenarios.

[0085] like Figure 2As shown, in an embodiment of the present application, the system for thermal management simulation of the whole vehicle may include a compressor, a condenser, an evaporator, a motor water tank, a motor water pump, a motor cooling circuit, a battery water tank, a battery water pump, a fan, a passenger compartment, a PTC heater, a battery module, a first three-way valve, a second three-way valve, a four-way valve, a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, a fifth heat exchanger, a first stop valve, a second stop valve, a third stop valve, a heat pump circuit stop valve, a PTC warm air channel stop valve, a cold air channel stop valve, a heat pump warm air channel stop valve, an evaporator electronic expansion valve, and a battery electronic expansion valve.

[0086] In this embodiment, if Figure 2 As shown, the first circuit can be mainly composed of a compressor, a condenser, an evaporator, a first heat exchanger, a second heat exchanger, a fourth heat exchanger, a first stop valve, a second stop valve, a third stop valve, a heat pump circuit stop valve, an evaporator electronic expansion valve and a battery electronic expansion valve.

[0087] Here, the first stop valve, the second stop valve, the third stop valve, the heat pump circuit stop valve, the evaporator electronic expansion valve and the battery electronic expansion valve can be simulated by the variable pressure reducing valve. The heat pump circuit stop valve can be the fourth stop valve. The evaporator electronic expansion valve can be the first electronic expansion valve. The battery electronic expansion valve can be the second electronic expansion valve.

[0088] Preferably, the variable pressure reducing valve can be made to simulate a stop valve by using a first physical signal, and the variable pressure reducing valve can be made to simulate an electronic expansion valve by using a second physical signal.

[0089] For example, when a variable pressure reducing valve is used to simulate a stop valve, the first physical signal may be 1, which means that the valve is open, and the first physical signal may be 0, which means that the valve is closed. When a variable pressure reducing valve is used to simulate an electronic expansion valve, the second physical signal may represent the opening of the expansion valve, and the value range is 0 to the maximum opening of the electronic expansion valve.

[0090] In this embodiment, if Figure 2 As shown, the second circuit can be mainly composed of a motor water tank, a motor water pump, a motor cooling circuit, a motor water tank, a battery water pump, a first three-way valve, a second three-way valve, a four-way valve, a PTC heater, a battery module, a first heat exchanger, a second heat exchanger, a third heat exchanger, and a fifth heat exchanger.

[0091] In this embodiment, if Figure 2 As shown, the third circuit can be mainly composed of a fan, an evaporator, a passenger compartment, a third heat exchanger, a fourth heat exchanger, a PTC warm air channel stop valve, a cold air channel stop valve, and a heat pump warm air channel stop valve.

[0092] Here, the PTC warm air passage stop valve may be the fifth stop valve, the cold air passage stop valve may be the sixth stop valve, and the heat pump warm air passage stop valve may be the seventh stop valve.

[0093] In this embodiment, if Figure 2 As shown, the first circuit and the second circuit can be connected to the first heat exchanger, the second heat exchanger, and the fifth heat exchanger. The first circuit and the third circuit can be connected to the fourth heat exchanger and the evaporator, and the second circuit and the third circuit are connected to the third heat exchanger.

[0094] Preferably, the first circuit is a refrigerant medium circuit, the second circuit is a coolant circuit, and the third circuit is an air circuit.

[0095] In this embodiment, the vehicle thermal management simulation system may be a simulation model constructed using SimScape. Figure 3 Schematic diagram of a simulation model of a vehicle thermal management simulation system provided by another embodiment of the present application. The vehicle thermal management simulation system may include a refrigerant medium loop, i.e., a loop connected by a cyan line, a coolant loop, i.e., a loop connected by a yellow line, and an air loop, i.e., a loop connected by a purple line.

[0096] In this embodiment, if Figure 3 As shown, the first circuit may include a compressor, a condenser, an evaporator, a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, a first stop valve, a second stop valve, a third stop valve, a heat pump circuit stop valve, an evaporator electronic expansion valve, and a battery electronic expansion valve. The second circuit may include a motor water tank, a motor water pump, a motor cooling circuit, a motor water tank, a battery water pump, a first three-way valve, a second three-way valve, a four-way valve, a PTC heater, a battery module, a first heat exchanger, a second heat exchanger, a third heat exchanger, and a fifth heat exchanger. The third circuit may include a fan, an evaporator, a passenger compartment, a third heat exchanger, a fourth heat exchanger, a PTC warm air channel stop valve, a cold air channel stop valve, and a heat pump warm air channel stop valve.

[0097] Preferably, the first circuit and the second circuit can be connected to the first heat exchanger and the second heat exchanger, and the condenser of the first circuit and the fifth heat exchanger of the second circuit can be connected through an air circuit. The first circuit and the third circuit can be connected to the fourth heat exchanger and the evaporator, and the second circuit and the third circuit are connected to the third heat exchanger.

[0098] In this embodiment, exemplarily, the model of the vehicle thermal management simulation system built based on SimScape can first obtain the historical parameter information required for model building, and the historical parameter information may include the type of refrigerant medium, the type of coolant, the size of the pipe flow section of the refrigerant circuit, the size of the pipe flow section of the coolant circuit, the capacity of the motor water tank, the capacity of the battery water tank, the maximum speed of the motor water pump, the maximum speed of the battery water pump, the maximum stroke of the three-way valve core, the maximum stroke of the four-way valve core, the maximum power of the PTC, and the maximum throttling opening of the electronic expansion valve.

[0099] The heat transfer model of the vehicle thermal management simulation system model built based on SimScape can be mainly based on the following formula (1):

[0100] Q = k × S × (T1-T2) (1)

[0101] Among them, Q is the heat, k is the heat transfer coefficient, S is the heat transfer surface area, and T1 and T2 represent the temperatures of the two objects undergoing heat transfer.

[0102] In this embodiment, for example, a variable pressure reducing valve may be used to simulate a stop valve and an electronic expansion valve in a vehicle thermal management simulation system.

[0103] The variable pressure reducing valve is mainly based on the following formulas (2) to (4):

[0104] Conservation of mass:

[0105]

[0106] in, is the inlet mass flow rate, is the mass flow rate at the outlet

[0107] Conservation of Energy:

[0108]

[0109] in, is the entrance energy, For export energy

[0110] Conservation of Momentum:

[0111] in,

[0112]

[0113]

[0114] Where ΔP is the pressure difference between the two ends, ρ is the fluid density, S is the flow cross section of the port, S R is the flow cross section of the throttle, vR is the flow velocity at the throttle port, v RC is the critical flow velocity, C d is the flow coefficient, Re c is the critical Reynolds number, and μ is the dynamic viscosity of the fluid.

[0115] In this embodiment, for example, Figure 3 As shown, the three-way valve in the vehicle thermal management simulation system may include A, B, and C interfaces. When the physical signal is 0, AC is open; when the physical signal is 1, AB is open. K is the maximum stroke of the three-way valve core. The four-way valve may include A, B, C, and D interfaces. When the physical signal is 0, AD and BC are open; when the physical signal is 1, AB and CD are open. K is the maximum stroke of the four-way valve core.

[0116] In this embodiment, the vehicle thermal management mode of the vehicle thermal management simulation system may include, for example, a passenger compartment cooling mode, a battery cooling mode, a motor cooling mode, a passenger compartment PTC heating mode, and a passenger compartment heat pump heating mode. The valve states in different vehicle thermal management modes may be:

[0117] Passenger compartment cooling mode: open the first stop valve, the second stop valve, the evaporator electronic expansion valve and the cold air channel stop valve, and close the third stop valve, the PTC warm air channel stop valve and the heat pump warm air channel stop valve.

[0118] Battery cooling mode: open the first stop valve, the battery electronic expansion valve, the battery water pump, and adjust the four-way valve to AD and BC.

[0119] Motor cooling mode: Turn on the motor water pump, adjust the four-way valve to BC and AD, adjust the first three-way valve to AB, and adjust the second three-way valve to AB.

[0120] Passenger compartment PTC heating mode: turn on the motor water pump, PTC, and PTC warm air channel shut-off valve, adjust the four-way valve to BC and AD, adjust the first three-way valve to AB or AC, adjust the second three-way valve to AC, and close the cold air channel shut-off valve and the heat pump warm air channel shut-off valve.

[0121] Passenger compartment heat pump heating mode: open the third stop valve, heat pump circuit stop valve, battery electronic expansion valve, heat pump warm air channel stop valve, and close the first stop valve, second stop valve, evaporator electronic expansion valve, cold air channel stop valve and PTC warm air channel stop valve.

[0122] Based on the constructed vehicle thermal management simulation system, the constructed component configuration collects the parameter information of vehicle thermal management required for simulation testing. According to the required simulated thermal management mode, the corresponding three-way valve, four-way valve, motor battery water pump, electronic expansion valve and stop valve are controlled to be open or closed, so that the vehicle thermal management simulation system can perform simulation testing according to the required simulated thermal management mode.

[0123] In this way, the system for whole vehicle thermal management simulation in this embodiment is adopted, and the system for whole vehicle thermal management simulation constructs multiple simulation loop modules for different thermal management modes / operating conditions, as well as variable pressure reducing valves that can be used to simulate stop valves and electronic expansion valves, etc. Through modular processing and adjustment, the simulation cycle can be effectively shortened, and the thermal management of the whole vehicle in various modes can be simulated more effectively, for example, simulating temperature changes in the passenger compartment, temperature changes in the battery motor, etc., thereby improving the versatility and flexibility of the whole vehicle thermal management simulation system.

[0124] In addition, the vehicle thermal management simulation system in this embodiment is used to simulate the electronic expansion valve through the variable pressure reducing valve to achieve the throttling and pressure reduction function of the refrigerant.

[0125] In addition, the system for whole vehicle thermal management simulation in this embodiment is used to implement mode switching among heat pump heating, PTC heating and passenger compartment cooling according to the opening status of each stop valve, effectively simulating the passenger compartment cooling, battery cooling, motor cooling, passenger compartment PTC heating and passenger compartment heat pump heating modes of the whole vehicle thermal management.

[0126] Figure 4 FIG. 1 is a flow chart of a method for simulating vehicle thermal management provided by another embodiment of the present application. Figure 4 In this embodiment, the vehicle thermal management simulation method is applied to the vehicle thermal management simulation system as described in the above embodiment, the vehicle thermal management simulation system may include a first loop, a second loop, and a third loop, and the vehicle thermal management simulation method may include:

[0127] Step 401: Obtain historical parameter information of thermal management of the entire vehicle.

[0128] Step 402: construct a vehicle thermal management simulation system based on the historical parameter information.

[0129] Step 403 : In response to receiving the simulation instruction of the configured target mode, the vehicle thermal management simulation system performs simulation processing based on the simulation instruction of the target mode to obtain simulation data of the target mode.

[0130] It should be noted that the historical parameter information may include the type of refrigerant medium, the type of coolant, the size of the pipe flow section of the refrigerant circuit, the size of the pipe flow section of the coolant circuit, the capacity of the motor water tank, the capacity of the battery water tank, the maximum speed of the motor water pump, the maximum speed of the battery water pump, the maximum stroke of the three-way valve core, the maximum stroke of the four-way valve core, the maximum power of the PTC, and the maximum throttling opening of the electronic expansion valve.

[0131] It should be noted that the simulation instruction of the target mode may include parameter information of the target mode for simulation. The parameter information of the target mode may include but is not limited to the medium type of the target mode, the size of the pipeline flow cross-section of the loop, the motor water tank capacity, the battery water tank capacity, the motor water pump speed, the battery water pump speed, the three-way valve core stroke, the four-way valve core stroke, the PTC maximum power, and the throttling opening of the electronic expansion valve.

[0132] In this way, the whole vehicle thermal management simulation system can be used to build multiple simulation loop modules for different thermal management modes / operating conditions, as well as variable pressure reducing valves that can be used to simulate shut-off valves and electronic expansion valves. Through modular processing and adjustment, the simulation cycle can be effectively shortened. The whole vehicle thermal management simulation system can be used for simulation testing of multiple thermal management modes, thereby improving the comprehensiveness and versatility of vehicle thermal management simulation testing.

[0133] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0134] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0135] In the technical solution of this application, the user personal information involved, such as the collection, storage, use, processing, transmission, provision and disclosure of user images and attribute data, etc., complies with the provisions of relevant laws and regulations and does not violate public order and good morals.

[0136] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0137] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution disclosed in this application can be achieved, and this document is not limited here.

[0138] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A vehicle thermal management simulation system, characterized in that: The system comprises: a first loop, a second loop, and a third loop; The first circuit includes a compressor, a variable pressure reducing valve, a condenser, an evaporator, and a heat exchanger; The second circuit includes a motor water pump, a battery water pump, a three-way valve, a four-way valve, a positive temperature coefficient PTC heater, a battery module, a heat exchanger, and a variable pressure reducing valve; The third circuit includes a fan, an evaporator, a heat exchanger, a passenger compartment, and a variable pressure reducing valve; Wherein, the first circuit and the second circuit are connected to the heat exchanger, the first circuit and the third circuit are connected to the heat exchanger and the evaporator, and the second circuit and the third circuit are connected to the heat exchanger; the first circuit is a refrigerant medium circuit, the second circuit is a coolant circuit, and the third circuit is an air circuit; There are multiple variable pressure reducing valves, and the system is used to operate the variable pressure reducing valves as stop valves in response to receiving a first physical signal, and to operate the variable pressure reducing valves as electronic expansion valves in response to receiving a second physical signal.

2. The system according to claim 1, characterized in that The number of the heat exchangers is multiple, and the heat exchangers of the first circuit include a first heat exchanger, a second heat exchanger, and a fourth heat exchanger; The variable pressure reducing valve of the first circuit includes a first stop valve, a second stop valve, a third stop valve, a fourth stop valve, a first electronic expansion valve and a second electronic expansion valve; The heat exchanger of the third circuit includes a third heat exchanger and a fourth heat exchanger; The variable pressure reducing valve of the third circuit includes a fifth stop valve, a sixth stop valve, and a seventh stop valve; Wherein, the first circuit and the third circuit are connected to the fourth heat exchanger and the evaporator.

3. The system according to claim 2, characterized in that The system is specifically used to open the first stop valve, the second stop valve, the sixth stop valve, and the first electronic expansion valve, and close the third stop valve, the fifth stop valve, and the seventh stop valve in response to receiving a passenger compartment cooling mode simulation instruction.

4. The system according to claim 2, characterized in that The system is specifically used to open the third stop valve, the fourth stop valve, the seventh stop valve, and the second electronic expansion valve, and close the first stop valve, the second stop valve, the fifth stop valve, the sixth stop valve, and the first electronic expansion valve in response to receiving a simulation instruction for the passenger compartment heat pump heating mode.

5. The system according to claim 2, characterized in that The number of the three-way valves is multiple, and the three-way valves of the second circuit include a first three-way valve and a second three-way valve; The heat exchanger of the second circuit includes a first heat exchanger, a second heat exchanger, a third heat exchanger, and a fifth heat exchanger; The first circuit and the second circuit are connected to the first heat exchanger and the second heat exchanger, and the second circuit and the third circuit are connected to the third heat exchanger.

6. The system according to claim 5, characterized in that The system is specifically configured to, in response to receiving a battery cooling mode simulation instruction, open the first shut-off valve, the battery water pump, and the second electronic expansion valve, and set the four-way valve to a battery cooling circuit connection state.

7. The system according to claim 5, characterized in that The system is specifically configured to, in response to receiving a motor cooling mode simulation instruction, turn on the motor water pump and set the first three-way valve, the second three-way valve, and the four-way valve to a motor cooling circuit connection state.

8. The system according to claim 5, characterized in that The system is specifically used to open the motor water pump, PTC heater, and fifth stop valve, close the sixth stop valve and the seventh stop valve in response to receiving a passenger compartment PTC heating mode simulation instruction, and set the first three-way valve, the second three-way valve, and the four-way valve to the PTC connection state.

9. The system according to claim 1, characterized in that The second circuit also includes a motor cooling circuit, a motor water tank, and a battery water tank; The motor cooling circuit is arranged between the first three-way valve and the second three-way valve, the motor water tank is connected to the motor water pump, and the battery water tank is connected to the battery water pump.

10. A method for simulating vehicle thermal management, characterized in that: The method comprises: Obtain historical parameter information of vehicle thermal management; Based on the historical parameter information, construct a vehicle thermal management simulation system as described in any one of claims 1 to 9; In response to receiving the simulation instruction of the configured target mode, the whole vehicle thermal management simulation system performs simulation processing based on the simulation instruction of the target mode to obtain simulation data of the target mode.

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