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Electric vehicle (BEV) refers to a vehicle that is driven by a vehicle power source and driven by a motor to meet the requirements of road traffic and safety regulations. As the impact on the environment is relatively small compared to traditional cars, its prospects are widely optimistic, but the current technology is not mature.
Working principle: battery - current - power regulator - motor - power transmission system - drive the car (Road).
Types of electric vehicles: pure electric vehicles (BEV), hybrid electric vehicles (PHEV), fuel cell vehicles (FCEV).
Electric vehicle technology principle
A pure electric vehicle replaces the fuel machine with an electric motor and is driven by a motor without the need for an automatic transmission. Compared with the automatic transmission, the motor has a simple structure, mature technology and reliable operation.
Conventional internal combustion engines can limit the speed at which torque is efficiently generated to a narrow range, which is why conventional internal combustion engine vehicles require large and complex shifting mechanisms; and motors can efficiently generate torque over a relatively wide range of speeds. In the pure electric vehicle driving process, there is no need to shift the shifting device, the operation is convenient and easy, and the noise is low.
Compared with hybrid vehicles, pure electric vehicles use a single electric energy source. The electronic control system greatly reduces the internal mechanical transmission system of the automobile, and the structure is simplified, and the energy loss and noise caused by friction of mechanical parts are also reduced, thereby saving the interior space of the automobile. weight.
The motor drive control system is the main execution structure of the new energy vehicle. The drive motor and its control system are one of the core components (battery, motor, electric control) of the new energy vehicle. The driving characteristics determine the main performance of the car. Indicator, which is an important part of electric vehicles. Fuel cell vehicles FCV, hybrid vehicle HEV and pure electric vehicle EV in electric vehicles all use electric motors to drive the wheels. Choosing the right motor is an important factor to improve the cost performance of various electric vehicles. Therefore, research and development can improve At the same time, it is extremely important to meet the performance requirements of the vehicle during driving, and to have a motor drive that is durable, low in cost, and high in performance.
Electric car features
1, no pollution, low noise
The exhaust gas generated by electric vehicles without the internal combustion engine does not produce exhaust pollution, which is very beneficial to environmental protection and air cleaning, and is almost “zero pollution”. It is well known that CO, HC and NOX, particulates, odors and other pollutants in the exhaust gas of internal combustion engines form acid rain acid mist 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.
2. High energy efficiency and diversification
Research on electric vehicles has shown that its energy efficiency has surpassed that of gasoline engines. Especially in the city, the car stops and stops, the driving speed is not high, and the electric car is more suitable. When the electric vehicle stops, it does not consume electricity. During the braking process, the motor can be automatically converted into a generator to realize energy reuse during braking deceleration. Some studies have shown that the same crude oil is crude and sent to the power plant for power generation. After being charged into the battery and then driven by the battery, the energy utilization efficiency is higher than that after being refined into gasoline and then driven by the gasoline engine, thus saving energy. And reduce the carbon dioxide emissions.
On the other hand, the application of electric vehicles can effectively reduce the dependence on petroleum resources, and can use limited oil for more important aspects. The electricity charged to the battery can be converted from energy sources such as coal, natural gas, hydropower, nuclear power, solar energy, wind power, and tides. In addition, if the battery is charged at night, it can also avoid the peak of power consumption, which is beneficial to the grid to balance the load and reduce the cost.
3, the structure is simple and easy to maintain
Electric vehicles are simpler in structure than internal combustion engines, with fewer running and transmission components, and less maintenance and repair work. When an AC induction motor is used, the motor does not require maintenance and, more importantly, the electric vehicle is easy to handle.
4, the power of this high driving range is short
The current electric vehicle is not as good as the internal combustion engine technology, especially the power supply (battery) has a short life and high cost of use. The battery has low energy storage, and the mileage is not ideal after one charge, and the price of the electric car is relatively expensive. However, from the perspective of development, with the advancement of science and technology, the corresponding human and material resources will be invested, and the problem of electric vehicles will be gradually solved. In order to avoid weaknesses, electric vehicles will gradually become popular, and their prices and use costs will inevitably decrease.
5. Supporting the development of grid technology
Operation characteristics of electric vehicle battery exchange station, replacement station as key technology and control strategy for distributed energy storage unit to access the grid; screening principle, group method and system scheme for battery ladder utilization; replacement station multi-purpose converter device; replacement station Integrated monitoring system with energy storage station; integrated demonstration project of replacement station and energy storage station.
The characteristics of electric vehicle charging demand and the impact of large-scale electric vehicle charging on the power grid; the orderly charging control management system for electric vehicles; and the orderly charging test system for electric vehicles.
Control strategy and key technologies for interaction between electric vehicles and power grids; intelligent charging and discharging machines for electric vehicles, intelligent vehicle terminals and interactive coordinated control systems for electric vehicles and power grids; interactive experimental verification systems for electric vehicles and power grids; and inspection and testing technologies for charging and discharging facilities for electric vehicles.
New charging and discharging technology for electric vehicles; intelligent charging and discharging control strategy and detection technology for electric vehicles; key technologies for 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 intelligent charging and replacing service network based on Internet of Things.
Second, what are the new energy electric vehicles suv?1. Beiqi New Energy EX200
Beiqi New Energy EX200 currently has two models for sale, namely Lok Ha and Le Cool, which are priced at 269,900 yuan - 216,900 yuan, and the price after subsidies in Beijing is 117,900 yuan - 126,900 yuan. Like the EV and EU series, the Beiqi New Energy EX200 is also developed on the basis of fuel vehicles. The EX200 was developed on the basis of the Beiqi Sic Bo X25.
Beiqi New Energy EX200 is the first electric SUV model of Beiqi. It has an inherent value and its configuration is comprehensive. In the "three powers" aspect, there is a cumulative accumulation of EV series, which has considerable advantages in stability. Moreover, Beiqi's electric vehicles are also the largest in the Beijing area, which can also increase consumer confidence in purchasing.
2, JAC iev6S
The JAC iev6s pure electric SUV is positioned in a small pure electric SUV. The new car continues the overall design line of the JAC Ruifeng S2. At the same time, it also adds many design elements that represent pure electric, such as closed air intake grille and blue front insurance. Bar decoration and brand LOGO with blue background.
3, Song EV300
In terms of styling, the Song EV300 is basically the same as the previously listed fuel version. The new car is only slightly adjusted in terms of details. The front bumper, headlights and other details are cleverly decorated with blue elements. The EV logo on the side of the body is It highlights its distinctive new energy vehicle identity.
The smart, interconnected configuration of the new car is more in line with the needs of young users. The rich configuration of the large panoramic sunroof, 360° panoramic image, PM2.5 green net system, Carpad multimedia system, memory linkage system, fixed speed cruise system and tire pressure monitoring system are all equipped on the Song EV300.
In the powertrain section, the Song EV300 is equipped with a permanent magnet synchronous motor with a maximum output of 160kW (218Ps) and a peak torque of 310Nm. The officially announced 0-100km/h acceleration time is 8.9s. The cruising range under comprehensive conditions is 300km. SUV models are favored by more and more Chinese users with their excellent vision, comfortable space and good performance. Therefore, pure electric SUV is also popular with everyone.
4, Roewe ERX5
The Roewe ERX5 pure electric version of the interior is different from the traditional gasoline version in that the block is replaced by a knob, which highlights the technical sense of the vehicle. The center console's 10.4-inch central control LCD integrates most of the commonly used functions and will use SAIC. The YunOS system developed in cooperation with the Ali Group. In the interior design, the interior color matching with two-color stitching, the central control only retains a few physical buttons, the visual effect is simple and generous.
In terms of size, the new car has a length and height of 4554/1855/1689mm and a wheelbase of 2700mm. Inheriting the fuel version of the Internet function, the pure electric version of the Roewe ERX5 is more competitive with the same level. In terms of power, the new car is equipped with a permanent magnet synchronous motor with a maximum power of 85kW (116PS) and a maximum torque of 255Nm. The new vehicle has a cruising range of up to 320km and a maximum cruising range of 425km.
February 13, 2023
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February 13, 2023
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