New energy vehicle thermal management solution
As the new energy vehicle industry continues to develop technology and enhance competitiveness under the encouragement of national policies, the requirements for the vehicle thermal management system are getting higher and higher, which has an important impact on the performance, life and durability of the vehicle . However, due to the complexity of the system, the forward design of the vehicle thermal management system has always been a difficulty and research hotspot in the industry. With the increasingly fierce competition in the new energy vehicle market, shortening the research and development cycle and reducing costs have become issues that must be faced in the research and development of new energy vehicles.
Typical vehicle thermal management systems for new energy vehicles include air-conditioning thermal management systems, electric motor thermal management systems, and battery thermal management systems. If it is a hybrid vehicle, it also includes the thermal management system of the powertrain.
The integrated design of multiple systems greatly increases the design difficulty and R&D costs. With the help of simulation technology, it is possible to analyze, evaluate and optimize the design scheme in the early design stage of vehicle development and before the trial production of the physical prototype, thereby reducing the rounds of sample trial production and testing, achieving the goal of reducing costs and shortening the development cycle.
Thermal analysis of battery pack
Based on the cell heating test data, a thermoelectric coupling model of the cell is established. Through this model, the heat generation and temperature rise of the cell at different temperatures and SOCs can be accurately obtained, providing a reliable cell-level model for Pack-level thermal analysis . Considering that the working conditions of the battery pack are all transient conditions, and the traditional CFD method has low transient calculation efficiency, so the heat-current coupling analysis method can be used to quickly charge the battery pack at high temperature and low temperature heating and fast charging. , Low temperature heating and slow charging, high temperature 30 minutes speed, high temperature fast charging + 30min speed and other working conditions are analyzed.
Electric motor thermal analysis
The heat loss is obtained based on the working conditions of the motor electronic control, and the heat loss is used as the input to carry out a detailed 3D thermal analysis on the motor electronic control, evaluate the heat dissipation scheme of the motor electronic control, and automatically optimize the key design parameters to achieve the heat dissipation performance and Matching of pump power consumption.
Vehicle thermal management system design
The design of the vehicle thermal management system includes two aspects: architecture design and component selection. Based on system integration and low energy consumption requirements, design the architecture of the thermal management system; based on the thermal management system architecture, combined with the component bench test data provided by the supplier, establish a vehicle thermal management system model, and realize rapid system matching analysis and analysis through the model Optimization of component selection.
Vehicle thermal management control algorithm development With the help of the off-line model of the vehicle's thermal management controlled object, the rapid development of thermal management control logic is realized. Through the joint simulation of the Simulink model of the algorithm and the controlled object model of the vehicle thermal management system, the calibration of key control parameters and the optimization analysis of the energy consumption of the thermal management system are realized.
