Now on the market electric car battery charging three or four hours running 150 kilometers, while the new Polytechnic developed a battery charging efficiency will be greatly improved. August 3, the national energy saving and new energy automotive construction seminar held in the South Polytechnic University, the school revealed that running the same distance new battery charging time less than 1/4. Today in the Polytechnic campus, the reporter saw a pure electric bus, the appearance of ordinary buses is no different. For this bus to provide power is installed in its "belly" below the lithium battery, occupy the luggage compartment to two grid so much space, fully charged, the car can run 250-500 km. Battery is the core of electric vehicles, the current ordinary electric buses equipped with lithium batteries, in the case of fast charging, charging 100 degrees per hour electricity, charging 3-4 hours, the car can run 150 kilometers. "Nanjing University of Science and Technology Associate Professor Hu Wenbin introduced in shortening the study of battery charging time, his team made great progress, they developed a pure electric bus lithium battery, fast charging 40 minutes, the bus can run 150 km continuously, 17-21 CMB and Small bus, once the electricity, running the city is enough. "We have developed a lithium battery internal structure has changed, the core technology is its own cooling system, take the smart battery energy management system." Hu Wenbin introduction. He explained that a bus battery is actually a battery pack, more than 150 batteries in series, before the entire battery charge, the specific performance of each battery will not be monitored, due to the charging effect and the worst performance Battery is closely related, so greatly reduced, as we usually use the old and new two batteries into the flashlight, the old battery will greatly reduce the use of new batteries the same effect. Intelligent battery energy management system can monitor the temperature of each battery, electricity, the actual charge absorption rate to adjust the size of the current charge, truly balanced charge per cell, "the first three batteries charge absorption rate of the poor, right The current increases the point; the other hand, the current on the transfer point. Battery cooling system comes with the battery on the market now is not the same. Now the battery is fan-cooled, the front of the battery cooling fast, slow cooling of the back of the battery, their cooling system is a special kind of liquid, you can do even and quickly remove the heat. "Environmental protection, saving money, easy driving These advantages are well known, in fact, he also has a 'hidden' advantages." Hu Wenbin said, "ordinary cars need regular maintenance, such as changing oil, cooling water, cleaning oil, these pure electric bus Do not need to take the 5 bus as an example, this route into an electric car, a year can save more than 1,000 million maintenance fee. It is reported that with the electric car charging pile construction is stepping up, according to Chen Yi Jian, chairman of Nanjing Yuecao Electric Company introduced the current charging pile covered mainly in public areas, supplemented by about 10% of residential parking spaces, the current Nanjing has 5000 charging pile, this year plans to add 7,000 charging pile covering the city. The charging pile must meet the national standards for new energy vehicles, and in the coming year it will also enhance its compatibility with diversified vehicle models.