Plug-in hybrid cars lead the future fate is sinking?

  As the concept of environmental protection has become more and more important, and low-carbon life has gradually become a fashion background, new energy vehicles have entered the homes of thousands of people because of their advantages of energy conservation and environmental protection. In the first half of this year, the total sales volume of new energy vehicles in China increased by 135% compared with the same period of last year, of which pure electric vehicle sales increased by 166%, and plug-in hybrid vehicles increased by 91%. It is predicted that by 2020, the global plug-in hybrid car sales will reach 1.35 million units, and sales will reach 2.7 million units by 2025.

From the perspective of market share, although the gap between plug-in hybrid vehicles and pure electric vehicles is large, its growth trend is also very obvious. Plug-in hybrid cars have the advantages of pure electric vehicles, and they don’t have to face “mileage anxiety” from time to time. Therefore, in recent years, it has been favored by consumers, and has attracted the attention and research and development of many car companies. Even the brand has positioned the plug-in hybrid car as the mainstream model in the future. However, in the context of a good industry, plug-in hybrid cars have attracted a lot of criticism because of the maturity of battery technology.

Industry suffers from advantages and disadvantages

The plug-in hybrid car is a new hybrid electric car that can be externally charged, can be driven in pure electric mode, and the battery is exhausted before driving in a hybrid mode (mainly internal combustion engine) and charging the battery in time.

Compared with pure electric vehicles , plug-in hybrid vehicles effectively solve the cruising range problem, and combine the traditional power system with the pure electric power system, not only make up for their respective disadvantages, but also maximize the advantages of both parties. Therefore, many industry experts believe that plug-in hybrid vehicles are more suitable for the development of China's current national conditions. However, the program has also been questioned by people.

Battery technology is missing, the cost of the whole vehicle is high

Plug-in hybrid vehicles mainly use electric motors and small internal combustion engines as hybrid power output. If you do not need to travel far, you only need to use battery power to provide power. When you are traveling, you can enable small internal combustion engines to provide power while charging the battery. Driving mileage.

However, because the plug-in hybrid vehicle requires the battery to be equipped with the ability to reserve electricity and increase the motor power, the battery pack energy is ten times or even twenty times that of the ordinary oil-electric hybrid car, so that not only the weight of the car increases. The cost will increase accordingly; at the same time, the increase in battery pack energy will also reduce the reliability and safety of the vehicle. In terms of technology development, the difficulty is higher than simply developing a pure electric car or an ordinary hybrid car. This requires the car company to provide more technical strength in the manufacturing process.

"Electric" and "car" communication are not connected to the charging problem remains unresolved

According to a US research report, the US grid low-altitude electricity supply can meet the charging demand of 148 million plug-in hybrid vehicles, accounting for 67% of the existing 220 million vehicles in the United States. However, from the point of view of the power supply, to ensure the best charging time at night, a communication connection between the power grid and the vehicle is required to control the charging time and allocate the necessary power.

However, the use of low-voltage power in China's power grid and the number of plug-in hybrid vehicles that can be supported in different power supply areas require further study. Especially in the case that most urban residents in China do not have independent garages, it is necessary to further study how to solve the charging scheme.

The system structure is complex and the vehicle system technology is low.

Plug-in hybrid car is not a simple combination of fuel power and motor. It needs automatic transmission clutch, advanced electronic control and high-end hybrid management system as support. It is difficult for manufacturers without technical accumulation to produce in a short time. .

In addition, depending on the structure, plug-in hybrid cars can be divided into three categories, and each manufacturer will manufacture different types of plug-in hybrid cars. Among them, the extended-range plug-in hybrid vehicle does not directly drive the wheels due to the engine and the generator, which causes waste of this part of the power, and the weight brought by the engine and the generator does not decrease, so in the high-speed road condition, the fuel consumption is instead biased. high. Therefore, different models will require manufacturers to have a higher level of technology to make up for the current shortcomings.

Market prospects can be solved with technical problems

Although plug-in hybrid vehicles combine the advantages of traditional and pure electric vehicles, their development speed is slow, the scope of promotion is small, and the choice of vehicles is small. The main reason for the popularity is that the research and development of the vehicle enterprises is small and the technical level is not mature. . Therefore, in order to plug in the hybrid car to become the mainstream of the future car, we must first improve the technical level.

In order to better understand and understand the current situation and future trends of the industry, on October 26, 2016, from 10:00 to 11:00 am, OFweek New Energy Auto Network will launch a “ plug-in hybrid system R&D and big data application ”. For the theme of the online seminar, Yang Lin, the professor of Shanghai Jiaotong University/Institute of Automotive Electronics Technology, will be invited as the lecturer.

This conference will analyze the current status, trends and key issues of plug-in hybrid vehicles, and propose several new plug-in hybrid systems to effectively solve the performance and reliability of existing similar systems. Inherent problems, improve the energy utilization efficiency of the whole vehicle and the pure electric driving range.

In addition, the conference will also study the adaptive control method for the actual road application, the battery system management method and the high-voltage safety control method, and discuss the application of big data in the plug-in hybrid vehicle . The adaptive control of the plug-in hybrid vehicle establishes a new model and control strategy.

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