Will the self-ignition of electric buses delay the pace of new energy vehicles?

Despite many conditions and many doubts, China's new energy vehicles still achieved important breakthroughs this year: In May 2011, sales of new energy vehicles in China were 3,226 units, and cumulative sales were 14,250 units, a cumulative increase of 32.61% year-on-year. Among them, the cumulative sales of new energy buses were 11,190, a cumulative increase of 38.35% year-on-year, and cumulative sales accounted for 78.53% of the cumulative sales of new energy commercial vehicles. The 2011 new energy vehicles will soon “group” to participate in the World University Games held in Shenzhen. It is to make new energy vehicles proud. The main position of new energy buses in the commercialization of new energy vehicles is gradually established.

Analysis of Sales of 11190 New Energy Buses in May 2011

The new energy bus industry did not have enough time to cheer on this achievement. The sudden onset of an electric bus in Shanghai immediately gave people a cool feeling. Although it was ascertained afterwards that the “battery for pouring water” used by the bus company staff was the main cause of the fire, the second accident following the spontaneous combustion of Hangzhou Zhongtai electric taxi still caused people to worry about electric vehicles and electric buses. Where did the car go? In the face of accidents, how should the electric vehicle industry regain public confidence?

Leibo electric bus is not a "first offender"

"Collaborative repair" hidden dangers?

Shanghai Electric Bus Spontaneous Ignition Event Causes the Exposure

Speaking of this spontaneous combustion of electric buses, Shanghai Leibo New Energy Automobile Technology Co., Ltd. can be said to be “a significant figure”. It is a joint venture between the State Grid Corporation of Shanghai Electric Power Company and Shanghai Ruihua (Group) Co., Ltd. In order to tie in with the development and popularity of electric vehicles, National Grid has announced that it will build electric vehicle charging stations in Beijing, Shanghai and other large cities to provide supporting facilities for the use of electric vehicles; Shanghai Ruihua has more mature supercapacitor drive technology, so The two sides hit it off. In September 2007, the Shanghai Leibo electric bus was formally put into operation in Shanghai, and then gradually put into the sanitation, power system, bus routes 825 and 20, and began to spread to areas outside Shanghai. According to the plan, Shanghai will purchase a total of 1,100 Leibo new energy vehicles this year.

However, at the beginning of last year, the concept of “Cooperator Construction” of Leibo Company was hit for the first time: In the early morning of January 7, 2010, a new type of battery capacitor developed and produced by Leibo New Energy and Anhui Ankai Automobile Co., Ltd. was jointly developed. The hybrid electric bus suddenly caught fire in the garage and caused other nearby electric vehicles of the same type to suffer different degrees of damage, with direct property loss of 1.9 million yuan.

According to the investigation, the internal battery of the first set of battery boxes on the left side of the electric bus produced a high-temperature spontaneous ignition and ignited the combustible decorative materials in the interior of the vehicle, causing the vehicle to spread, and the car had been damaged due to the battery two or three months before the incident. Faults Frequently replaced the battery. The driver once discovered that the battery connection line in the battery that caused the fire later was short-circuited and disconnected. The high failure rate of the battery inside the battery box made the expert speechless. "Coincidentally," the "perpetrators" happened to be also the lithium iron phosphate batteries produced by Anaixin (Beijing) Energy Storage Technology Co., Ltd.

Xu Min, director of Automotive Engineering Research Institute of Shanghai Jiaotong University, pointed out that unlike modern gasoline vehicles, new energy vehicles can't monopolize the entire production chain. Many vehicle companies do not understand the battery, the motor, and the control system. They can only do one assembly work (more on traditional models). Others let different companies do the work. Due to trade secrets involved, the communication and communication among various manufacturers are poor, and the people who use the units often do not understand the technical indicators of these vehicles, nor do they know how to check and handle the faults (this time the situation of Shanghai bus companies is very representative Sexual) Is the entire vehicle system unreasonable? Security is not safe? There are also no uniform product standards and testing standards. In addition, everyone has little experience in the design layout (battery layout) of electric vehicles. The situation of unreasonable battery placement can be found everywhere. In particular, can the batteries installed in the trunk have potential safety hazards? "This is not everyone, only when something goes wrong!"

Dr. Liang Shulin, a senior engineer at Zhuhai Yintong, believes that joint construction is an inevitable choice for market competition. “No one can monopolize all technologies. Now electric vehicle R&D is all in its infancy, everyone needs to learn from each other,” Liang also pointed out It's no use talking about it, and those companies who worry about others stealing their own technology can't do a good job of EVs." In the absence of a unified standard, they should strengthen the communication between vehicles, batteries, and electronic control companies. Communication is particularly important. How to ensure that the powertrain composed of the motor system matches the entire vehicle has become a technical problem to be solved for new energy vehicles.

"Original" battery repeats mistakes

What are the "government-run" companies missing?

Beiqi Foton electric bus battery box details developed by Shanghai Daba

"All purchases are not supervised!" A Shanghai taxi driver who once worked at a public transportation company pointedly pointed out that the battery that had been problematic was still in use, and once again there was a problem. Isn't this kind of product yet? The whole withdrawal?

“We don’t understand the situation and we don’t feel comfortable guessing.” Manager Liu Yaqi of Shanghai Daba New Energy Technology Co., Ltd. did not respond positively to such a problem, but he told the electric car Times Net reporter that they were at the Guangzhou University City charging station. The 26 pure electric buses on the 801 line have served for nearly a year (the batteries used had served the Beijing Olympic Games in 2008 and their life expectancy has reached the limit of three years and one replacement), and most vehicles are running for 16 hours each day. The body of the battery box has been worn out. "But most of the batteries are still working properly and can be said very responsibly. There is no major failure."

The manager of Zhejiang Jiabeisi’s Haojie Hao analyzed that the single cells of many domestic lithium battery companies have performed very well in the laboratory, but the efficiency has dropped rapidly after being grouped, and the problems that arise after being put on the car are even more. The design of the battery box may seem simple, but how to ventilate and how to cool it is very particular. Some company's battery box has a fan, but it does not achieve the uniform heat dissipation function. Instead, it blows hot air to a single location, resulting in individual batteries. Overheating and aging. The manager also admitted that the current domestic battery management system can only be regarded as a "surveillance system," and the management capability is not strong or even. If an entire vehicle company purchases these defective battery packs, "the accident is only a matter of time."

New energy is the "trend" of urban public transport

Creating a new business model is imminent

Shanghai Electric Bus Development Electric Bus Replacement Station

“This incident is ultimately due to the lack of a commercialization model. The impact will be, but it will not be too great. It is more to promote the improvement of management methods by the relevant departments and to allow companies to pay more attention to the safety performance of the power battery.” Mr. Liu said, promoting cleanliness. Energy buses have become the key point for the nation's urban transportation to enter the “deoiling” era. In order to complete the “12th Five-Year Plan” energy-saving and emission reduction work, local governments will focus on public transportation reforms if they change public buses and taxis. Being an electric car will greatly reduce the environmental pollution.

However, the government can give money to subsidize the purchase of cars and give policies to help electric vehicles to get on the road, but relying on traditional management models is not suitable for new energy vehicles (especially new energy buses), which will bring a lot of problems. “This is also what we are actively With the cooperation between Luneng and South ChinaNet and building a new commercialization model, we cannot think of a charging station as a gas station or a gas station, but rather a (two-way) energy station that can recycle the battery. The realization of “the sale of complete vehicle battery rental as the main supplement for slow charging” is also conducive to the centralized management of power batteries, which directly reduces the purchase cost of electric vehicles. It is the new energy vehicles and new energy buses that are expected to be large-scale. Promotional operations are worth considering.

It is understood that Shanghai Electric Pak Corporation, as the initiator of the electric exchange model in the field of pure electric vehicles and the holder of domestic and international PCT patents for “an electric bus system”, was included in the 2008 Beijing Olympic Games, the 2010 Shanghai World Expo, and the 2010 Guangzhou Asian Games. The system provider will be replaced soon, and a preliminary exploration will be made in the commercialization operation. It has attracted attention in the field of quick change in the world. Its battery cabinet was exported to Spain for the first time recently.