| With the environment and resource issues increasing remarkably, it is very obvious that car industry develops towards electric vehicles, and each auto manufacturers and relevant research institutions are committed to the development of electric vehicle. Distance per charge is one of the difficulties to restrict the development of electric vehicles. To recycle and reuse the energy of the moving vehicles is an effective way to improve the performance of the electric vehicle. But during the vehicle braking frequently, the battery will be also charged and discharged repeatedly with it, which will shorten the service life of the battery for the present widely used batteries; if the battery will be in the large current discharge as the only energy source when the vehicle speeds up or climbs, and the service life of the battery can also be affected by the large current discharge; By the influence of the battery charging characteristics, it is not able to carry on the energy recovery rapidly when the vehicle is braking emergently, which makes the energy recovery and utilization rate is not high. Considering that utilization of the flywheel energy storage has the advantages of high energy storage density, no high charge discharge, and short charging time and so on, if to add the flywheel energy storage device into the electric vehicle energy storage system, and use the characteristic of flywheel energy storage to recover and store the braking energy quickly, which is used as separate energy or coupling output of electric motor’s energy to drive the vehicle, it’s to improve performance of electric vehicles a viable technical solution.In order to study the practical application effect of flywheel energy storage device, this paper has carried out the design of the flywheel energy storage braking energy recovery test bed, and carried out the braking energy recovery test. Experimental research by test bed can be used to solve the problem that the use of computer simulation is unable to establish accurate mathematical models at the initial stage, and it is also able to verify the initial design scheme and technical performance, and compared with the entire vehicle design, it can reduce the development cost and shorten the development cycle.The main research contents of this article are as follow:(1) Combining the vehicle’s force during braking, the braking model of the vehicle is classified in order to analyze the energy recovery process of the vehicle. the evaluation index of electric vehicle’s regenerative braking performance is put forward. Different energy storage modes have been made a detailed comparative analysis.(2) The braking energy recovery test-bed of flywheel energy storage is designed. The working principle of the key components of the test-bed is introduced, and the parameters of the key parts the experiment using is determined. The measuring principle of the speed measuring device used in this experiment is analyzed, and according to the idea of modularization, the hardware components of the speed measuring device are introduced, and its hardware connection circuit diagram is designed and its software development flow is introduced.(3) Combing with the research contents, the working principles and concrete implementation process of the experiment are described in detail, and the regenerative braking conditions of the flywheel for energy storage under different initial recovery energy circumstances has been made a detailed comparative analysis. |
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