New energy electric vehicles, English: (New energy electric vehicles) The composition of new energy electric vehicles includes: electric drive and control system, mechanical systems such as driving force transmission, and working devices to complete predetermined tasks.

The electric drive and control system is the core of the electric vehicle, and it is also the difference from the internal combustion engine vehicle. The electric drive and control system consists of a drive motor, a power supply, and a speed control device for the motor. The rest of the electric car is basically the same as the internal combustion engine car.

It provides electric energy for the driving motor of the electric vehicle, and the electric motor converts the electric energy of the power supply into mechanical energy. At present, the most widely used power source is lead-acid battery, but with the development of electric vehicle technology, lead-acid battery is gradually replaced by other batteries due to its low energy, slow charging speed and short life. The developing power sources mainly include sodium-sulfur batteries, nickel-cadmium batteries, lithium batteries, fuel cells, etc. The application of these new power sources has opened up broad prospects for the development of electric vehicles.

Electric vehicle refers to a vehicle that is powered by on-board power supply and driven by a motor, and meets the requirements of road traffic and safety regulations. It runs on electricity stored in batteries. Sometimes 12 or 24 batteries are used when driving the car, sometimes more.

Less pollution and low noise

Electric vehicles have no exhaust gas produced by internal combustion engine vehicles, and do not produce exhaust pollution, which is very beneficial to environmental protection and air cleanliness, and is almost "zero pollution". As we all know, CO, HC and NOX, particulates, odors and other pollutants in the exhaust gas of internal combustion engine vehicles form acid rain, acid fog and photochemical smog. Electric vehicles have no noise generated by internal combustion engines, and the noise of electric motors is also smaller than that of internal combustion engines. Noise is also harmful to human hearing, nerves, cardiovascular, digestive, endocrine and immune systems.

Energy Efficient and Diversified

Studies of electric vehicles have shown that their energy efficiency has surpassed gasoline-powered vehicles. Especially in urban operation, where cars stop and go, and the driving speed is not high, electric vehicles are more suitable. The electric vehicle does not consume electricity when it stops. During the braking process, the electric motor can be automatically converted into a generator to realize the reuse of energy during braking and deceleration. Some studies have shown that the same crude oil is crudely refined, sent to power plants to generate electricity, charged into batteries, and then driven by batteries, the energy utilization efficiency is higher than that after refining into gasoline, and then driving vehicles through gasoline engines, so it is conducive to saving energy. and reduce carbon dioxide emissions.

On the other hand, the application of electric vehicles can effectively reduce the dependence on oil resources, and the limited oil can be used for more important aspects. The electricity charged to the battery can be converted from coal, natural gas, hydro, nuclear, solar, wind, tide and other energy sources. In addition, if the battery is charged at night, it can also avoid peak electricity consumption, which is conducive to balancing the load of the power grid and reducing costs.

Simple structure and easy maintenance

Compared with internal combustion engine vehicles, electric vehicles have simpler structure, less operation and transmission parts, and less maintenance work. When an AC induction motor is used, the motor does not require maintenance, and more importantly, the electric vehicle is easy to operate.

High power cost and short driving range

At present, the electric vehicle is not as perfect as the internal combustion engine vehicle technology, especially the power source (battery) has a short life and high use cost. The energy storage of the battery is small, the mileage after a single charge is not ideal, and the price of electric vehicles is more expensive. But from a development point of view, with the advancement of science and technology and the investment of corresponding human and material resources, the problem of electric vehicles will be gradually solved. Taking advantage of strengths and circumventing weaknesses, electric vehicles will gradually become popular, and their prices and usage costs will inevitably decrease.

Power Grid Technology Supporting Development

Operation characteristics of electric vehicle battery replacement station, the key technology and control strategy of the replacement station as a distributed energy storage unit connected to the power grid; the screening principle, grouping method and system scheme of the battery cascade utilization; the multi-purpose converter device of the replacement station; the replacement station Integrated monitoring system with energy storage station; demonstration project of integration of replacement station and energy storage station.

Electric vehicle charging demand characteristics and the impact of large-scale electric vehicle charging on the power grid; electric vehicle orderly charging control management system; electric vehicle orderly charging test system.

Control strategies and key technologies for the interaction between electric vehicles and power grids; intelligent charging and discharging motors for electric vehicles, intelligent on-board terminals, and coordinated control systems for the interaction between electric vehicles and power grids; experimental verification systems for the interaction between electric vehicles and power grids; testing technology for electric vehicle charging and discharging facilities.

New charging and discharging technologies for electric vehicles; intelligent charging and discharging control strategies and detection technologies for electric vehicles; key technologies for the interactive operation of charging facilities and power grids.

Large-scale electric vehicle battery replacement technology, metering and billing, asset management technology; business model for charging facility operation; operation management system construction plan for an intelligent charging and swapping service network based on the Internet of Things.

Battery technology that supports battery life and range

At present, the batteries of many new energy vehicles are still traditional lead-acid batteries, which seem to contradict the original intention of new energy vehicles in terms of weight, storage capacity and safety. Therefore, if it is not possible to break through the bottleneck in automotive electrical energy storage technology and develop epoch-making products, it will be impossible for new energy vehicles to be widely used in practice. At present, the relatively advanced technology at this level of development can refer to the Tesla electric car, which alleviates this contradiction by integrating the chassis of the car with the battery. Of course, Tesla electric cars also have huge problems with other aspects such as safety, so it has not been able to be widely sold.