The Power System Matching And Energy Management Strategy Research Of Fuel Cell Range Extender Electric Vehicle

In this article, a model of Electric Vehicle with Fuel-cell Range Extender is built in GT-SUITE, which is based on different driving conditions and diverse dynamic and economic parameters as input. Multi-power powertrain integration technology can be studied by energy storage system on board based on different driving conditions as input parameters.Based on the vehicle parameters of a traditional A-type car, power and energy demand of several typical driving cycles are simulated based on the platform. According to the requirements of the national standard for electric vehicle performance design, in combination with vehicle acceleration performance, climbing performance and typical driving cycles, the corresponding power demand, energy demand and power performance and economy index can be calculated under the use of the vehicle dynamic simulation model. And on this basis, the design of the drive motor and power battery, fuel cell engine matching parameters are completed, which provide a reference for the determination of the actual system parameters. Finally in NEDC conditions as an example, the vehicle powertrain simulation validation and matching are done.Established the simulation model of the fuel cell extended-range electric vehicle. In order to achieve the target of driving range and fuel cell to be longest, the thermostat, power spilt and instantaneous optimization energy management strategy were established. The simulation results showed that the thermostat can take the fuel cell life into consideration F under the premise of ensuring the fuel economy at the cycle with low average speed and high idle speed ratio. The power spilt energy strategy can cover the driving cycle with high average speed and small idle speed ratio, but the fuel economy is poor. The instantaneous optimization energy management strategy has the best fuel cell economy except extreme cycle, however, it has a bad effect on the fuel cell life since it has big fuel cell system output power change rate.The test and simulated results show that the fuel cell vehicles simulation model based on GT-Suite is a necessary simulation platform for different conditions in the power system solutions design.Taking in NEDC conditions as an example, the vehicle powertrain matching and simulation validation are done.Then the solution is tested by the real range test.The result shows that the power system is practical and reliable in matching scheme.