CN-121997528-A - Vehicle thermal management simulation method, vehicle thermal management simulation system and related devices

CN121997528ACN 121997528 ACN121997528 ACN 121997528ACN-121997528-A

Abstract

The application discloses a vehicle thermal management simulation method, a vehicle thermal management simulation system and related devices, wherein the simulation method comprises the steps of constructing the vehicle thermal management simulation system based on related elements in the vehicle thermal management system; the simulation system comprises an exhaust system simulation model and a warm air loop simulation model which are coupled, simulation parameters are set in the simulation system, wherein the simulation parameters comprise characteristic parameters and boundary condition parameters respectively corresponding to the exhaust system simulation model and the warm air loop simulation model under preset working conditions, the simulation system is operated based on the simulation parameters, and heat loss caused by the exhaust system simulation model under the preset working conditions is determined according to simulation calculation results of the warm air loop simulation model. The application can enable the vehicle thermal management simulation system to efficiently and accurately evaluate the heat loss caused in the actual operation of the vehicle thermal management system.

Inventors

Ge Rongfang
LIU ZHIKUN
CHEN SHAOLONG
XIONG SHUANGYUAN
WANG JUN

Assignees

应雪汽车科技(常熟)有限公司

Dates

Publication Date: 20260508
Application Date: 20251205

Claims (13)

1. A method of thermal management simulation of a vehicle, comprising: constructing a vehicle thermal management simulation system based on related elements in the vehicle thermal management system, wherein the simulation system comprises an exhaust system simulation model and a warm air loop simulation model which are coupled; Setting simulation parameters in the simulation system, wherein the simulation parameters comprise characteristic parameters and boundary condition parameters respectively corresponding to the exhaust system simulation model and the warm air loop simulation model under a preset working condition; and operating the simulation system based on the simulation parameters, and determining the heat loss caused by the exhaust system simulation model under the preset working condition according to the simulation calculation result of the warm air loop simulation model.
2. The vehicle thermal management simulation method according to claim 1, wherein, The step of constructing the vehicle thermal management simulation system based on the relevant elements in the vehicle thermal management system comprises the following steps: connecting elements related to exhaust gas based on the flow sequence of the gas-liquid two-phase state cooling liquid in the vehicle thermal management system, defining the flow direction of the gas-liquid two-phase state cooling liquid to construct the exhaust system simulation model, and And connecting elements related to a warm air loop based on the flow sequence of the liquid-phase cooling liquid in the vehicle thermal management system, and defining the flow direction of the liquid-phase cooling liquid to construct the warm air loop simulation model.
3. The method for simulating thermal management of a vehicle of claim 2, The step of connecting the elements related to the exhaust gas based on the flow sequence of the gas-liquid two-phase state cooling liquid in the vehicle thermal management system and defining the flow direction of the gas-liquid two-phase state cooling liquid to construct the exhaust system simulation model comprises the following steps: establishing an element model corresponding to an exhaust hose, a warm air expansion water tank and a low-temperature radiator, wherein the warm air expansion water tank comprises an air cavity and a liquid cavity; based on the flowing sequence of the gas-liquid two-phase state cooling liquid in the vehicle thermal management system, connecting two ends of the exhaust hose with the air cavities of the low-temperature radiator and the warm air expansion water tank respectively; and defining the flow direction of the gas-liquid two-phase cooling liquid as the length extending direction of the exhaust hose so as to form the exhaust system simulation model.
4. The method for simulating thermal management of a vehicle of claim 3, The step of connecting elements related to a warm air circuit based on a flow sequence of liquid-phase cooling liquid in the vehicle thermal management system and defining a flow direction of the liquid-phase cooling liquid to construct the warm air circuit simulation model includes: Establishing element models corresponding to the heat sources of the water pump, the warm air core body and the motor; Based on the flowing sequence of the liquid-phase cooling liquid in the vehicle thermal management system, respectively connecting the liquid cavity of the warm air expansion water tank with the water pump and the motor heat source, and arranging the warm air core between the water pump and the motor heat source; Defining the flowing direction of the liquid-phase cooling liquid as the flowing direction of the liquid-phase cooling liquid flowing into the water pump through the liquid cavity of the warm air expansion water tank, flowing out to the warm air core body through the water pump, flowing out to the motor heat source through the warm air core body, and then flowing into the liquid cavity of the warm air expansion water tank through the motor heat source so as to form the warm air loop simulation model.
5. The method for simulating thermal management of a vehicle of claim 4, The step of setting simulation parameters in the simulation system comprises the following steps: Defining material simulation parameters respectively corresponding to the exhaust hose and the warm air expansion water tank; Defining a plurality of thermal convection paths of the exhaust hose corresponding to the warm air expansion tank, and setting thermal convection boundary conditions based on the plurality of thermal convection paths so as to simulate heat transfer; Defining a gas state boundary condition in the air cavity of the warm air expansion tank, defining a mixture state boundary condition at an interface end of the low-temperature radiator, and defining an air inlet boundary condition at an air inlet of the warm air core.
6. The method for simulating thermal management of a vehicle of claim 5, The step of defining a plurality of thermal convection paths of the exhaust hose corresponding to the warm air expansion tank and setting a thermal convection boundary condition based on the plurality of thermal convection paths to simulate heat transfer includes: Defining a first heat convection path and a corresponding heat exchange coefficient along a first direction based on the exhaust hose, and defining a second heat convection path and a corresponding heat exchange coefficient along a second direction, wherein the first heat convection path is connected with the air cavity of the warm air expansion water tank, the inner cavity of the exhaust hose and the low-temperature radiator, the second heat convection path is connected with an external environment, a first hose wall surface of the exhaust hose, the inner cavity of the exhaust hose, a second hose wall surface of the exhaust hose and the external environment, the first direction is a length extending direction of the exhaust hose, the second direction is a direction in which the first hose wall surface points to the second hose wall surface, and the first direction is perpendicular to the second direction.
7. The vehicle thermal management simulation method according to claim 6, wherein, The step of defining a plurality of thermal convection paths of the exhaust hose corresponding to the warm air expansion tank and setting a thermal convection boundary condition based on the plurality of thermal convection paths to simulate heat transfer, further comprises: And defining a third thermal convection path and a corresponding heat exchange coefficient along the first direction based on the warm air expansion water tank, and defining a fourth thermal convection path and a corresponding heat exchange coefficient along the second direction, wherein the third thermal convection path is connected with the air cavity of the warm air expansion water tank and the inner cavity of the exhaust hose, and the fourth thermal convection path is connected with the external environment, the first wall surface of the warm air expansion water tank, the air cavity of the warm air expansion water tank, the liquid cavity of the warm air expansion water tank, the second wall surface of the warm air expansion water tank and the external environment.
8. The method for simulating thermal management of a vehicle of claim 7, The step of operating the simulation system based on the simulation parameters and determining the heat loss caused by the exhaust system simulation model under the preset working condition according to the simulation calculation result of the warm air loop simulation model comprises the following steps: Operating the simulation system based on the characteristic parameters and the boundary condition parameters respectively corresponding to the exhaust system simulation model and the warm air loop simulation model to obtain a simulation result, wherein the simulation result comprises total input heat and total output heat of the warm air loop simulation model, wherein the total input heat is the total heating amount of the motor heat source, and the total output heat is the total heat dissipation amount of the warm air core; and calculating a difference value between the total input heat and the total output heat, and defining the difference value as the heat loss caused by the exhaust system simulation model under the preset working condition.
9. The vehicle thermal management simulation method of claim 8, wherein, After the step of operating the simulation system based on the simulation parameters and determining the heat loss caused by the exhaust system simulation model under the preset working condition according to the simulation calculation result of the warm air loop simulation model, the method comprises the following steps: Adjusting a plurality of simulation parameters, and operating the simulation system based on the adjusted simulation parameters to continuously determine the heat loss caused by the exhaust system simulation model under the preset working condition according to the simulation calculation result of the warm air loop simulation model; Repeating the steps of adjusting the simulation parameters and operating the simulation model to obtain the optimal simulation parameters corresponding to the minimum heat loss.
10. A vehicle thermal management simulation system is characterized by comprising an exhaust system simulation model and a warm air loop simulation model which are coupled, wherein the simulation system performs simulation calculation through the vehicle thermal management simulation method according to any one of claims 1-9, so that heat loss caused by the exhaust system simulation model under the preset working condition is determined according to a simulation calculation result of the warm air loop simulation model.
11. The vehicle thermal management simulation system of claim 10, wherein, The exhaust system simulation model comprises an exhaust hose, a warm air expansion water tank and a low-temperature radiator; the warm air loop simulation model comprises a water pump, a warm air core body and a motor heat source; The two ends of the exhaust hose are respectively connected with the low-temperature radiator and the air cavity of the warm air expansion water tank; The outlet of the liquid cavity of the warm air expansion water tank is connected with the inlet of the water pump; The outlet of the water pump is connected with the liquid inlet of the warm air core body; The liquid outlet of the warm air core body is connected with the inlet of the motor heat source; and an outlet of the motor heat source is connected with an inlet of the liquid cavity of the warm air expansion water tank.
12. An electronic device, comprising: A memory for storing program data which when executed implements the steps in the vehicle thermal management simulation method according to any one of claims 1 to 9; A processor for executing the program data stored in the memory to implement the steps in the vehicle thermal management simulation method according to any one of claims 1 to 9.
13. A computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, and when executed by a processor, the computer program implements the steps of the vehicle thermal management simulation method according to any one of claims 1 to 9.

Description

Vehicle thermal management simulation method, vehicle thermal management simulation system and related devices Technical Field The application relates to the technical field of electric automobiles, in particular to a vehicle thermal management simulation method, a vehicle thermal management simulation system and related devices. Background The power battery of an electric automobile generates a large amount of heat during high-current charge and discharge, and development of a thermal management system of the electric automobile is indispensable for preventing thermal runaway. In the early stage of development of the electric automobile thermal management system, the influence of the heat loss of the exhaust device on the system design needs to be evaluated. In the related art, a large number of bench tests are generally performed to verify whether the system development is reasonable. However, the above verification method requires a large amount of capital and time costs, and the heat loss of the vehicle heat management system cannot be estimated accurately and efficiently. Disclosure of Invention The application provides a vehicle thermal management simulation method, a vehicle thermal management simulation system and a related device, which are beneficial to more efficiently and accurately evaluating the heat loss of the vehicle thermal management system. The first technical scheme adopted by the application is to provide a vehicle thermal management simulation method, which comprises the steps of constructing a vehicle thermal management simulation system based on related elements in a vehicle thermal management system, wherein the simulation system comprises an exhaust system simulation model and a warm air loop simulation model which are coupled, setting simulation parameters in the simulation system, wherein the simulation parameters comprise characteristic parameters and boundary condition parameters respectively corresponding to the exhaust system simulation model and the warm air loop simulation model under preset working conditions, operating the simulation system based on the simulation parameters, and determining heat loss caused by the exhaust system simulation model under the preset working conditions according to simulation calculation results of the warm air loop simulation model. In some embodiments, the step of constructing the vehicle thermal management simulation system based on the related elements in the vehicle thermal management system includes connecting the elements related to the exhaust gas based on a flow sequence of the gas-liquid two-phase coolant in the vehicle thermal management system and defining a flow direction of the gas-liquid two-phase coolant to construct an exhaust system simulation model, and connecting the elements related to the warm air circuit based on a flow sequence of the liquid-phase coolant in the vehicle thermal management system and defining a flow direction of the liquid-phase coolant to construct the warm air circuit simulation model. In some embodiments, the step of connecting elements related to exhaust gas based on the flow sequence of gas-liquid two-phase cooling liquid in a vehicle thermal management system and defining the flow direction of the gas-liquid two-phase cooling liquid to construct an exhaust system simulation model comprises the steps of establishing an element model corresponding to an exhaust hose and a warm air expansion water tank and a low-temperature radiator, wherein the warm air expansion water tank comprises an air cavity and a liquid cavity, connecting two ends of the exhaust hose with the air cavities of the low-temperature radiator and the warm air expansion water tank respectively based on the flow sequence of the gas-liquid two-phase cooling liquid in the vehicle thermal management system, and defining the flow direction of the gas-liquid two-phase cooling liquid as the length extension direction of the exhaust hose to form the exhaust system simulation model. In some embodiments, the step of connecting elements related to a warm air loop based on a flow sequence of liquid-phase cooling liquid in a vehicle thermal management system and defining a flow direction of the liquid-phase cooling liquid to construct a warm air loop simulation model comprises the steps of establishing an element model corresponding to a water pump and a warm air core and a motor heat source, connecting a liquid cavity of a warm air expansion water tank with the water pump and the motor heat source respectively based on the flow sequence of the liquid-phase cooling liquid in the vehicle thermal management system, and arranging the warm air core between the water pump and the motor heat source, wherein the flow direction of the liquid-phase cooling liquid is defined to flow into the water pump through the liquid cavity of the warm air expansion water tank, flow out to the warm air core through the water pump, flow out to the motor heat source th