Supercapacitor drive technology has become the mainstream of current hybrid bus technology in China

When people are once again worried about the performance of their own brands in the competition for energy-saving and new energy vehicles in the world, the hybrid power of Chinese passenger cars has shown an upward power.

"In the demonstration and promotion of thousands of vehicles in the ten cities, the hybrid bus is the most successful among the various types of vehicles currently in use. It has the conditions to promote it to the whole country on a large scale. In recent days, the "green technology leads the future" " At the analysis seminar for the Energy Saving and New Energy Automobile Industry Development Planning (2012-2020), Wang Binggang, head of the supervision consulting expert group for national "863" energy-saving and new energy automobile major projects, gave the performance of the self-owned brand passenger cars on hybrid power. Very high rating.

In this regard, the Deputy Minister of Finance Zhang Shaochun also said: Taking into account the stable performance of hybrid buses, energy-saving emission reduction effect is significant, the recent promotion will be used throughout the country. For cities with slower promotion and ineffective results, and models that fail to meet the requirements for demonstration and promotion, their pilot and demonstration qualifications will be cancelled.

Obviously, the Chinese bus has once again demonstrated its power on its own. Among this upward force, one company has received attention from various parties. Wang Binggang praised it as an example of innovation. The super capacitor-driven technology it developed is not only China’s innovation in the world, but also has a fuel-efficient effect that exceeds that of Eaton of the United States. The system's hybrid buses have become the mainstream of China's hybrid bus technology.

This company is located in Xiamen's Jinlong Wagon Co., Ltd. With this technology, it has become the most competitive company in the hybrid vehicle market.

Supervision inspection team and joint test team evaluation

Starting in November of last year, relevant personnel from four ministries and commissions, including the Ministry of Finance, the Ministry of Science and Technology, the Ministry of Industry and Information Technology, and the National Development and Reform Commission jointly formed the overall supervision and inspection team for demonstration and promotion of energy-saving and new-energy vehicles, and the five-pronged five-way expansion project for 25 model cities was launched. an examination. In the inspection that lasted two months or so, although far from the 73,200 energy-saving and new energy vehicles planned for promotion in 2012, there were only 11423 vehicles, but the hybrid buses were the best in terms of completion and accounted for the promotion of the demonstration. 56% of the total.

Wang Binggang, who is one of the leaders of the inspection and inspection team, summed up the seminar: "Eliminating the Eaton system's hybrid buses, by the end of last year, there were 6,449 hybrid buses operating in 25 pilot cities. He was followed by There are two charts, one is the statistical graph of the city distribution, the top three are Shenzhen, Chang-Zhu-Tan, and Hangzhou; the other is the statistics of the number of hybrid bus brands, and the top three are Wuzhou. Dragon, CSR and Golden Brigade.

Comparing the two charts given by Wang Binggang, it is easy to find that whether it is a Wuzhou Dragon or a CSR car, its sales market is almost local, that is to say, local umbrellas hold up their numbers. In the total sales volume of more than 700 units in the same period, Xiamen only accounted for 10 vehicles, which is enough to show that the Golden Brigade has built up the market by its competitiveness.

In the field of passenger cars, hybrid cars and pure electric self-owned brands are widening their gaps with foreign countries. The Chinese bus companies represented by Golden Brigade have demonstrated their vitality.

Not long ago, the National Joint Test Team led by the four ministries and commissions of the State Party conducted a sample test of eight kinds of hybrid powertrains and 13 types of hybrid powertrains being modeled and operated in Kunming. Two vehicles were selected for each type of vehicle and a total of 26 vehicles were mixed. The bus is compared with 3 traditional buses. What makes Wang Binggang happy is that there are two brands of hybrid buses whose average fuel consumption and performance surpass that of the Eaton system hybrid buses.

Wang Binggang said: This is a kind of pride. We Chinese people are not lack of R & D capabilities, but just want to do. Now everyone says that they are independent and innovative, they always feel that they can't afford it. However, the hybrid technology system independently developed by Golden Brigade exceeds the level of the American system. This is not an occasional data. It is a batch of vehicles. And reliability has reached a very good level, and the price is significantly lower than Eaton. This shows that as long as Chinese companies work hard, it is not impossible to do these things.

As an expert on energy-saving and new energy vehicles, Wang Binggang has a deep understanding of the demonstration and operation of energy-saving and new energy vehicles in 25 pilot cities. He said that according to the current situation, there are two routes that are more mature and one is based on gold. The representative is a super capacitor (sometimes a super capacitor + lithium battery hybrid hybrid energy storage) energy storage drive technology, and the other is a power type lithium battery and AMT system technology. The idea of ​​the super capacitor energy storage proposed by the Golden Brigade is entirely an innovation that we did not think of before. Therefore, both the supervision inspection team and the joint test team gave a lot of recognition to the Golden Brigade.

A negative capacitor has been rejected

When it comes to independent innovation, there is a phenomenon that has caused us to think deeply. In the long list of companies developing hybrid buses, there are no shortage of big auto companies, and there are also many national 863 electric vehicle projects. On technology, on capital, that one is better than the Golden Brigade, but why not get any support from the country, there are not too many places to protect the business, but there is such a big move in the hybrid power? There is only one answer - they Understand the market and know the value that users need.

In the last century, when Bush was the president of the United States, he had a huge R&D plan for new energy vehicles. Super capacitor technology was the highlight of the plan. However, compared to the chemical battery, after the super capacitor is fully charged, it only allows the car to continue to travel a few kilometers of weakness, which makes the United States finally give up the idea of ​​using super capacitor technology in the car. At this time, NiMH batteries were successfully used by Toyota on the Prius.

The negation of the Americans, the success of the Japanese people in applying nickel-metal hydride batteries led China to consider super-capacitors as an important technological path in the “863” project. In the country’s many policies on energy-saving and new energy vehicles, it can be said that it is rare to see the shadow of encouraging supercapacitor technology.

However, from the day of its birth, it began to fend off the golden brigade in the market, and it did not fall into the technical framework set by the country like other companies. When many companies were poorly recycled with nickel-metal hydride batteries and the fuel-saving effect was too high, Golden Brigade was looking for new energy storage batteries.

Responsible for ABB's low-voltage product projects, Lin Yibei, currently the director of the new energy project group of the Goldenway Technology Center, saw an article introducing U.S. supercapacitor technology during the search process. During the search, he found out that U.S. Mike owns this technology. Maxwell Corporation has just set up an office in Shanghai. At that time, Maxwell, which was dominated by wind energy storage, did not know that supercapacitors could be used in hybrid buses.

Lin Yibei, who is good at inverter technology and control technology, like to find a baby, because he knows that if you want to achieve deep mixing, the power consumption will be very large, which requires that the energy storage system needs high efficiency, the motor and the frequency conversion system need high efficiency, So as to achieve high fuel efficiency. The supercapacitor discharge efficiency can reach 98%, which is much higher than the charge and discharge efficiency of 80% of the ordinary battery. The supercapacitor can also release energy pulses frequently without efficiency attenuation. What is even more impressive is that the supercapacitors have almost no chemical reaction during energy storage and therefore have a very long life. At this time, vector control frequency conversion technology has begun to mature in China, and the autonomous new energy system has the strength to compete with foreign new energy systems. This gave the Golden Brigade's new energy technology team a great boost.

At the beginning of 2007, Maxwell provided supercapacitors for the first time on the golden brigade hybrid bus. This is the third-generation hybrid bus developed by Golden Brigade. In the next five years, the Golden Trip hybrid buses equipped with super-capacitors began to operate in Beijing, Hangzhou, Nanchang, Tianjin, Haikou and other cities, and continued to innovate and improve, which has enabled Jinli’s hybrid buses to reach the fifth level. generation. It was this perseverance and self-reliance that enabled the Golden Brigadier to emerge as a dark horse before the national team and large enterprises. This dark horse running out is taking users' hearts with action.

Supercapacitor goes beyond conservative to achieve innovation

Wang Bing-gang, who has always been committed to the development of energy-saving and new-energy automotive technologies, first noticed that Golden-brigade hybrid technology was not from companies. In the second half of 2007, the Beijing Environmental Protection Bureau purchased five companies' hybrid buses for trial operation across the country. After six months of observation, a systematic review was made. As an expert on the "863" National Energy Saving and New Energy Vehicle Major Project, Wang Binggang participated in this observation and summary.

What Wang Binggang just thought is that the best hybrid bus with fuel saving, attendance, and reliability is not from the national team, but from the Golden Trip in Xiamen. That is, this time, let Wang Binggang began to notice super capacitor energy storage drive technology. Since then, Wang Binggang has become a communicator of this technology.

In fact, volunteers to become such communicators are Hangzhou Public Transport, Tianjin Binhai Bus and Nantong Bus. Hangzhou has a similar experience with Beijing Public Transport. In 2007, the hybrid models of several companies began trial operation in Hangzhou. After more than six months of no-load, full-load trials and passenger-laden trials of line simulation operations, Golden Bridging Hybrid Power stands out with a relatively stable performance in the bidding of Hangzhou Public Transport. In 2008, Hangzhou had purchased 45 gold brigade hybrid buses at one time without subsidies from the “Ten cities and 1,000 vehicles”. At the meeting, Minister of Science and Technology Gao Xinhua introduced: As early as 2005, Hangzhou Public Transport and the Golden Brigade cooperated in the development of hybrid buses. After all, it was a new thing. So at the initial stage, they encountered problems such as feeding power and climbing difficulties. The Golden Brigade is a fast-moving enterprise, constantly exploring and communicating, and after successfully developing a hybrid system for supercapacitor energy storage and motor direct drive in 2007, it solved the problems existing in the original operation. Until now, the hybrid bus in Hangzhou Public Transport has accounted for more than 700 of the Golden Brigade, which accounted for half of the total number of hybrid buses in Hangzhou.

“Reliable, stable and fuel-efficient.” This feeling also appeared on the Tianjin Binhai Bus. Gao Zenghui, Minister of Coastal Public Transport Technology, introduced at the meeting: In May 2010, we purchased the 12 meters of 36 golden brigades through open tender. Hybrid buses, as of July 2012, 36 hybrid buses accumulatively run more than 4.8 million kilometers, and 135,000 kilometers of bicycles traveled. From this operating point of view, the engine from the power system, the permanent magnet generator, and the drive The main components of motors, battery packs, electronically controlled clutches, hybrid controllers, and drive motor controllers are generally stable and reliable without any quality problems. Because of this, in the following several purchases, we have successfully won the tenders with high fuel-saving rate, low failure rate, and quick service. So far we have 112 Golden Hybrid hybrid buses.

It should be said that pilot cities with relatively little local protection have mostly adopted different brands of benchmarking methods. The world’s affairs are often afraid of comparisons. Nantong Bus is also an approved Golden Trip in comparison.

Chen Jianping, head of Nantong’s public transport supervisor, introduced at the meeting: At the end of 2010, the Nantong municipal government purchased 50 energy-saving and new energy buses through public bidding, 47 of which were hybrid buses. At that time, we chose two technical routes. One was a lithium iron phosphate battery for energy storage, and the other was a dual-motor structure and hybrid electric drive system. One was Golden Brigade's supercapacitor as the main energy storage device. Drive motor direct drive hybrid. Through the actual operation for a period of time, the hybrid technology of Golden Travel Technology highlights its advantages. Due to the use of a super-capacitor with good charge and discharge efficiency, the engine power to be carried is reduced to 25% to 30% compared to the engine power of a conventional bus with the same length, which lays a good foundation for fuel economy.

In January of this year, Nantong once again organized a tender. One of the procedures involved was to require companies to provide prototypes, conduct actual operations on selected routes, and conduct comprehensive experimental tests. As a result of the test, the fuel efficiency and road adaptability of the Golden Prototype are superior to those of other companies, so the company won the bid for 43 hybrid buses again.

When people are concerned that their own brands fail to surpass the competition in the world's energy-saving and new energy vehicles, the autonomy of the Chinese bus companies represented by Golden Brigade is not worth thinking.