The Research Of Energy Management Of Vehicle Power Supply System Based On Automobile Exhaust Waste Heat Thermoelectric Generation

With the development of society, the vehicle is becoming more and more popular. In2011China’s automobile market continues to sustained growth. The annual car sales have exceeded18.5million. How to realize the energy-saving and emission-reduction has become a key problem of the automobile industry. The thermoelectric generation is a green technology, which can convert heat energy to electrical energy by using semiconductor materials. As the car tail gas contains a lot of heat, it can be used to create electricity. As a result, we improve the fuel efficiency of the car, realizing the energy saving and emission reduction.This study is based on the thermoelectric generation test bench of wuhan university of technology, introducing the structure and theory of automobile exhaust waste heat thermoelectric generation system, as well as the structure of vehicle power source. And in this paper the mathematical model of thermoelectric generator is established, whose input/output characteristics are also contained. On how to improve the thermoelectric generator’s power and efficiency, the related factors are discussed and researched, such as the performance of the thermoelectric module and thermoelectric materials, the geometry size of the thermoelectric module, the topology structure and connection of the thermoelectric module, the structure of the hot side and cold side, the cooling method, the clamping way and so on.The focus of this paper is the research of energy management and control strategy of vehicle power supply system based on automobile exhaust waste heat thermoelectric generation. This paper build models of the subsystems of the vehicle power supply system, as well as the vehicle simulation model based on new vehicle power supply system based on the ADVISOR platform. Do the simulation of the new vehicle power supply system, selecting different electric loads. And then analyse the energy flow of the power supply system. Meanwhile the simulation results are compared and analysed. The simulation results confirm that the vehicle fuel economy is improved based on the new power supply system and the new control strategy.Another emphasis of this paper is how to build the models of the subsystems of the vehicle power supply system, especially the thermoelectric generation system. To optimize the model of the thermoelectric generator is also very difficult, because there are many parameters to optimize. What’s more, most of the parameters’ optimizing ask for different discipline theory knowledge and the corresponding simulation software. For example, to optimize the structure of gas box and the water box requires the thermodynamics knowledge and the CFD software. To optimize the clamping way requires the mechanics knowledge and the ANSYS software. To optimize topology structure and connection of the thermoelectric module requires electrical knowledge.