With the continuous implementation of various plans and policies related to the development of the electric vehicle industry in the "13th Five-Year Plan", the spring breeze of the market-oriented development of electric vehicles is blowing. However, compared with traditional fuel vehicles, the marketization process of electric vehicles is currently facing some bottlenecks. During the "13th Five-Year Plan" period, we should closely rely on advanced technology to overcome these bottlenecks. Among them, the power battery is one of the key core components of electric vehicles. Taking advantage of the advanced technology of power batteries will benefit the healthy development of the electric vehicle industry.
The cost of electric vehicles
The cost of power battery and system accounts for *** in the cost of the entire vehicle. Therefore, the cost of the power battery system is directly related to the cost of the entire vehicle of the electric vehicle. Give full play to the advantages of power battery and system technology and cooperate with the technological progress of the entire vehicle. A substantial reduction in its cost can be achieved.
Power batteries determine their cost based on their ability to store electrical energy per unit weight. During the "Twelfth Five-Year Plan" period, we achieved the industrialization goal of ***Wh/kg energy density, and the industrialization goal determined during the "Thirteenth Five-Year Plan" period. It is 300~350Wh/kg. This goal can be achieved through the improvement of materials and the progress of process technology. Once this goal is achieved, the cost of power batteries can be reduced by 30%***50%, and at the same time through scale and standardization By the end of the "Thirteenth Five-Year Plan", the overall cost of power batteries can be reduced by more than 50%.
In addition, with the continuous improvement of automobile lightweight and power system efficiency, electric passenger vehicles can achieve a comprehensive power consumption of less than 10kWh per 100 kilometers. Combining actual requirements, mainstream electric vehicles will be equipped with 30kWh***40kWh in the future. The power battery system can meet the needs of most private users (a full charge can achieve a trip of more than 300 kilometers). With this configuration and cost, the comprehensive cost of electric vehicles will have the ability to compete with traditional fuel vehicles, and finally realize the market-oriented development of electric vehicles without subsidies.
Electric cars make the most convenient problem
Compared with traditional fuel vehicles, the current overall feeling of electric vehicles is not convenient enough in the process of driving. One is the problem of mileage anxiety, and the other is the convenience of charging (long charging time and insufficient charging points). A large part of mileage anxiety also comes from insufficient charging convenience, which affects the development of electric vehicles. Therefore, how to break through this bottleneck technically will be a key factor.
One way is to develop fast charging technology for power batteries and systems. At present, most of the charging time of the power battery system is as long as several hours (slow charging), which increases the inconvenience of electric vehicles and reduces the range of electric vehicles. The development of fast charging technology for power batteries will shorten the charging time of power batteries and systems to less than 15 minutes, which will greatly improve the convenience and maximum efficiency of electric vehicles, and the design of advanced power batteries and systems can achieve this. A fast charging capability.
Another method is to use centralized and specialized fast charging stations. The charging time of electric vehicles is long, and long-term charging under different environmental conditions and lack of monitoring also poses greater safety risks. Therefore, combined with the fast-charging battery system, the provision of high-power, centralized professional intelligent charging service stations will become inevitable. A reasonable layout of charging stations will greatly enhance the convenience of electric vehicles and improve the The profit rate of charging equipment.
This kind of smart charging station can be regarded as a part of a small smart micro-grid, including photovoltaic + conventional grid + energy storage + charging equipment, according to the specific conditions of different regions, the above system components can be optimized and combined to suit specific applications** *. When such a professional charging site is reasonable, electric vehicles will be as convenient as traditional fuel vehicles, and the cost of payment will be much lower than traditional fuel vehicles.
Electric vehicles make the most of reliability and safety issues
At present, the power battery industry is striving to develop batteries and system products with high energy density, high reliability, and safety. This has laid a solid foundation for the long-term safety and reliability of electric vehicles. However, the use of electric vehicles **Especially charging management is also an important link to ensure the safety and reliability of the power battery system.
According to the current usual practice, although remote data monitoring, regular maintenance, charging monitoring and security services provide a better guarantee for the safety and reliability of electric vehicles, they are all "passive". Only when problems occur can they be discovered and dealt with in time.
In fact, we can be more "active": when building high-power, fast charging stations, upgrade the charger to a device with the ability to detect the power battery system. In this way, the power battery and system are tested and diagnosed while charging, to ensure that the power battery and system of the electric vehicle are put into operation in a healthy state, and potential problems can be actively discovered in advance, so as to carry out necessary maintenance, Repair or maintenance to ensure that the power battery and system are used safely and reliably during the life cycle.
In addition, the centralized fast charging equipment has higher reliability, accuracy and charging control conditions, which can greatly prevent the power battery and system from being overused during the charging process.
Through the big data system of production, monitoring, charging and testing, it is possible to accurately and conveniently summarize and analyze the use and health status of the power battery, actively maintain, improve and upgrade, and greatly improve the use of electric vehicles. * Reliability and safety, to avoid safety and reliability due to untimely maintenance, improvement, or excessive abuse.
In summary, we can use advanced lithium battery technology and professional charging and testing services to achieve the highest level of cost, convenience, reliability, safety and environmental friendliness of electric vehicles to enhance the competition with traditional fuel vehicles. To promote the healthy development of the marketization of electric vehicles.