Two, the development direction of car of new energy have accurate definition of new energy vehicles, refers to the use of non conventional car as the power source for fuel (or the use of conventional fuels, the new vehicle power device), the integrated vehicle dynamic control and driving of advanced technology, technology advanced, has formed the new structure, new technology of automobile. New energy vehicles, including hybrid cars, pure electric vehicles (BEV, including solar cars), fuel cell electric vehicle (FCEV), hydrogen engine cars, other new energy sources (such as high energy storage, two ether) automobile etc.. The following describes the following: 1, hybrid electric vehicles hybrid electric vehicle with internal combustion engine and motor as power, because it is the power source, does not need to store large amounts of energy in the energy storage device, which overcomes the disadvantage of short driving distance of electric vehicles, and fuel economy is superior to conventional car. Save non renewable energy, and greatly reduced exhaust emissions, is the mainstream of the electric car market at present. However, the two sets of system installed at the same time to just install a system on the car, not only increase the car's weight, also increased the overall process control requirements, etc.. Thus the structure of hybrid vehicle control complex, high technical requirements, the cost and the selling price of the corresponding higher. And it is still used in the traditional internal combustion engine, the consumption of non renewable energy resources can hardly be avoided, to improve energy utilization and Protect environment performance is still unsatisfactory. 2, the pure electric vehicles electric vehicle is an internal combustion engine to replace the motor fuel, using the motor as power, electrochemical battery as energy storage unit, with no dependence on oil, no noise and vibration, good performance, high efficiency advantages. Advantages of power is not used fuel, zero emission and low noise; at the same time, because of the use of electric energy control system compared with the single, hybrid electric vehicle is simplified, the cost is reduced, the price also can compensate the battery. However, energy density and power density electrochemical battery is relatively small, the endurance is low, the pure electric vehicles can only be used for tourism and other short-range travel. Although the recent development of the high performance battery such as a lithium ion battery has achieved great success, but its cost is higher, the further promotion of pure electric vehicle is very difficult. Figure 2 is a pure motor structure diagram. 3, the fuel cell electric vehicle fuel cell electric vehicles with electric motor as power, fuel battery as energy conversion device, use hydrogen as fuel. The development of fuel cell vehicle difficulty lies in hydrogen storage, fuel cell size and high cost of production, development of high performance of proton exchange membrane and complex control systems, electric vehicles powered by fuel cell powered fuel cell electric car called the FCE (Fuel Cell Electric Vehicle), FCEV is the first big the fuel cell bus FCEB (Fuel Cell Electric Bus). The quality of fuel cell early FCEV itself and its ancillary equipment of heavy, bulky, occupy the bus loading space very much, almost no passenger space, bring great difficulties to the general layout FCEV. Compared with the traditional internal combustion engine, F C E V not by thermomechanical process, not by the Kano cycle limit, has the advantages of high energy conversion efficiency, environmental friendly diesel vehicle incomparable, but can still keep the traditional internal combustion engine vehicle high speed, long distance running and safety, comfort, is considered the twenty-first Century clean first, efficient means of transport. Domestic and foreign experts generally believe that fuel cell technology will become the core of auto industry in twenty-first Century.