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。。。