Charging station charging pile provides fast charging for new energy vehicle battery

　　More and more electric vehicle drivers are using charging pile equipment compatible with multiple power supplies to charge vehicles in Shenzhen's centralized charging station. With the continuous breakthrough of power battery technology, the energy density and power density of lithium battery are improved simultaneously, which improves the continuous driving performance of electric vehicles on the one hand. In Shenzhen's centralized charging station, more and more electric vehicle drivers are using charging pile equipment compatible with various power supplies to charge vehicles. With the continuous breakthrough of power lithium battery technology, the energy density and power density of lithium ion battery have increased in parallel, which not only improves the driving range of electric vehicles, but also makes "fast charging" possible, and its power supply time is equivalent to that of fuel vehicles. The "power distribution" charging pile method matrix flexible charging pile technology can not only meet the current battery charging demand, but also meet the future "battery upgrade" demand, preventing the charging pile from being pulled out repeatedly. By the end of last year, China had 450000 charging piles of all kinds, 14 times the number in the middle of 2014, and the ratio of vehicle piles nationwide was about 3.8:1. However, with the steady progress of charging network construction, there is also a certain degree of structural supply shortage. The mismatch of resources leads to the coexistence of "difficult charging" and a large number of idle public charging piles. In addition, for a long time, most of the electric vehicle public charging piles put on the market are fixed power charging piles, and the design of charging piles is mostly considered to meet the current vehicle battery standards. 40kW、60kW、80kW、110KW。。。 With the increase of power of new models, the charging pile will be replaced or expanded. On the electric vehicle stock market, the coexistence of various electric vehicles is a fait accompli. Therefore, in the centralized charging station, how to improve the power compatibility of charging equipment is the key. "When the charging current is the same, when the voltage rises to 1000V, if the vehicle with the voltage platform of 350V is still charging, according to the existing technology, the power utilization rate is less than one third of the original, and the equipment utilization rate is particularly low," Xiao Xia said, Chairman of Shenzhen Aotexun Power Equipment Co., Ltd.: "The charging pile technology can not only meet the current battery charging demand, but also meet the future 'battery upgrade' charging demand, preventing the charging pile from being pulled out repeatedly." It is reported that the matrix flexible charging pile technology developed by altxun centralizes all or part of the charging modules of the electric vehicle charging station, and dynamically distributes the charging modules according to the actual charging power of the electric vehicle through the power distribution unit. That is to say, among the charging stations adopting the charging pile technology, after sharing the same power of the charging pile, it can meet the requirements of 100k W battery charging and 300kW battery charging, so as to ensure that each new energy vehicle can be charged at the maximum power. Shenzhen has more than 80 centralized charging stations, which are invested and operated by Aoxun and equipped with flexible charging piles. Li Zhigang, chief engineer of Aoxun Power Equipment, said that "sharing power" is a bit like "sharing bandwidth", "Before there was no charging pile, the fixed power charging equipment was like a network with a fixed bandwidth. If the total bandwidth was 100 megabytes, there were 10 users, and the bandwidth of each user was fixed at 10 megabytes, then even if many users did not use broadband, the maximum bandwidth of other users was still 10 megabytes; while the charging pile was like a shared bandwidth, which can be dynamically adjusted according to the number of users and the required bandwidth. If there was only one user, His bandwidth can reach 100 megabytes at most. " Wei Jian, deputy general manager of Shenzhen Qianhai Ouxun New Energy Service Co., Ltd., introduced that how much electricity can be distributed by the charging terminal depends on the electric vehicle after charging. Ouxun's technical team designed a huge computing system, established a cloud platform, and conducted intelligent management on the platform to collect the big data of hundreds of electric vehicles' identity information. When charging, The charging terminal can perform power distribution "handshaking" at the moment when the gun is inserted into the charging port, read all vehicle information and intelligently distribute it to the vehicle for charging. Since December last year, Shenzhen Municipal Bureau of Market Supervision and Administration and Shenzhen Municipal Development and Reform Commission jointly organized the preparation of Shenzhen Standardization Guidance Technical Document - Technical Requirements for Electric Vehicle Flexible Charging Pile Implemented in Shenzhen, this is China's first local standard on flexible charging piles for electric vehicles. Shenzhen Aotexun Power Equipment Co., Ltd. is a leading enterprise in the power automation power supply segment industry and the leading drafting unit of this standard. "For taxis, trucks and other operating vehicles, the power adaptability of the centralized charging station directly determines the convenience of charging." Ni Feng, deputy director of the international department of Guodian NARI Technology Co., Ltd., said, "In the application scenario of the centralized charging station, the charging pile technology has the characteristics of accurate and efficient matching, which will undoubtedly be of great use."

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