Key technology of new energy vehicles "stuck"

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Key technology of new energy vehicles "stuck"

Wore high-tech aura of the recent spate of new energy vehicles in the major auto show extravaganza, but in the process of large-scale production, batteries, motors and other key technology components highlighted bottlenecks and new energy vehicles suffered "praised" the embarrassment.

The coexistence of a variety of technical line

Since the 15 period, China's new energy vehicles and gradually formed a "three vertical and three horizontal" technical route pattern: "three vertical" for hybrid vehicles, electric vehicles, fuel cell vehicles; "three horizontal" multi-energy driving force for the total into the control system, motor and control system and battery management system. Tsinghua University, Tongji University and other new energy automotive technology research institutions in the hybrid, electric, hydrogen fuel, alternative fuels have different emphases, the formation of the coexistence of a variety of technical development trend line.

According to the national industrial policy, the Chinese Society of Automotive Engineers, Minister of parts to speculate Yan Jian, China's new energy vehicle technology development ideas based on hybrid vehicles starting point for new energy to pure electric vehicles for the medium-term objectives to long-term fuel cell is goals.

Experts, hydrogen-powered fuel cell vehicles is the academic community that is the best of new energy vehicles, but due to the current high cost of hydrogen and fuel cell technology, a series of security-related issues remain to be cracked, which can only be look "foreign" sigh.

In contrast, electric systems and engine with a hybrid vehicle, not only to meet the needs of short-term emissions, but fewer changes in infrastructure, as from the traditional fuel vehicles transition to electric cars, products, by some car manufacturers blitz . FAW Toyota Prius, Shanghai GM Buick LaCrosse, BYD F 3D M's new energy vehicles and other products is the product of this philosophy.

According to the Institute of Tsinghua University, automotive experts, with the early 2009 the State Council promulgated the "automobile industry restructuring and revitalization plan," the new energy policy strategy toward a pure electric car vehicles, while continuing to maintain the "three vertical and three horizontal" pattern on the basis of emphasis on the "three horizontal" in the post and two horizontal, that is, motor and control system and battery management system.

This policy change in the business of products quickly apparent: in the "three vertical and three horizontal" development pattern, to hybrid cars as the main direction of Changan Automobile in 2009 launched at the end of pure electric vehicles Benben MIN I ; has been to focus on hydrogen fuel vehicles for the development of SAIC, is busy with the recent layout batteries, motors and other key components, and plans to launch electric cars by 2012.

It is reported that as of now, China has 24 companies, 47 kinds of new energy products included in the Chinese automotive manufacturers and product announcements, which includes electric vehicles, hybrids, etc., with electric vehicles based new energy automotive industry base everywhere in the country. In the capital markets, some of the industry chain of electric car batteries, motor and other companies has been sought after.

Highlights key technology bottlenecks

According to reports, although compared to Japan, Europe and some countries, the development of new energy vehicles started not later, but the domestic auto companies of new energy technology is not advanced. The key technical "stuck", so that made the new energy automotive industry enthusiasm is difficult to translate into practical productive forces.

For the "automobile industry restructuring and revitalization plan" to "form a production capacity of 500,000 electric vehicles, new energy vehicles for 5% of total passenger cars' development goals, a considerable part of the attitudes of the industry is not optimistic.

Miao Wei, vice minister of Industry in a forum recently that the country is facing electric vehicle batteries, motor, electric control system and other key core technology bottlenecks. He speculated that in 2020 the sale of new energy vehicles will account for a small percentage of overall sales, about 10% to 15%.

China Machinery Industry Federation, Zhang Xiaoyu, vice president of media interviews, said Chinese car companies there is no appropriate technology to produce, as did Nissan Toyota Lexus hybrid vehicles. "At present, the weak Honda hybrid vehicles can save 38 percent, while China's energy-saving products can only reach 20% level. This proves that the new energy vehicles in electronic control technology has yet to be research."

According to reports, the pure electric car, the lead-acid battery life is short, nickel-metal hydride batteries with limited resources, high cost of lithium battery technology in recent years, exploration has gradually emerged.

Miao Wei said that China is no accounting for a company with the production of new energy automotive batteries cost about 30% of the diaphragm, all imported. "Battery separator production technology and equipment are included in Western export restrictions on our list, and now we want to buy this equipment, technology, process, no one sold to us."

Coexistence of old and new technical problems

Automotive Engineering, Tsinghua University, Professor Ouyang Ming Gao pointed out that the battery power while involved in hybrid, electric and fuel cell three kinds of electric vehicles, the power system will be strongly dependent on the transformation of a breakthrough in battery technology. However, battery technology is at the present stage of China's new energy auto industrialization of the biggest difficulties, including nickel-metal hydride batteries and lithium battery life, consistency, cost and other issues.

"Li-ion battery technology, barriers to entry are not high, but it is not easy to do." New Energy Technology, Tsinghua University and Institute of New Energy Material Chemistry Research Office He Xiangming said that the current lithium battery technology research, there are many issues be improved, above all, resistance problems, the current level of China's best foreign and best level difference of 10 times. Another problem is the consistency of the battery, lithium battery has a characteristic that overcharge and over discharge is not good, like mobile phones using a single-chip Li-ion battery problems easy to control, but the number of vehicles using lithium batteries is a complex series and parallel in together, if consistency is not good, it is likely to cause some over-charge, some charge less than a phenomenon, which will affect the entire battery life and cost. At home and abroad on this issue have not fully resolved.

In addition, the electric vehicle battery voltage is now about 100 volts to 600 volts, when a car fell into the accident, how to keep the passengers do not shock, but also the need to overcome the technical problems of the current one

Some experts pointed out that due to the current vehicle production and sales in short supply, the major auto companies more of a focus on the development of varieties to meet market needs, while reducing consumption of traditional energy sources is not doing enough.

Many industry insiders pointed out that the traditional car key technical level will largely determine the level of development of hybrid vehicles. Hybrid vehicles despite an increase in motor as a power source, but the traditional internal combustion engine still needs to play an important role. Therefore, in addition to motor, battery and other new technologies should continue to explore, the enhancement of automatic transmissions and other key technologies inherent in conventional cars as urgent.

"If the traditional energy vehicles do well, expect to achieve in the new energy vehicles a step beyond that is unrealistic." Miao Wei said, we attach importance to the development of R & D of new energy vehicles at the same time, do not forget the traditional energy saving vehicles energy, this one has a lot of space, there is a mature technology, but also ready-made products. Japan in 2001 to develop an ambitious technology plan, and then 10 years the fuel consumption decreased by 10%. I can not say that we achieved an average fuel consumption of the standard in Japan in 2005, but I do not dare say that our standards are only achieved the standard in Japan in 1985, but if they keep up the pace, the gap is still more than 20% of the space.

 

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