Guigang Electric Vehicle Maintenance Products
3. Power requirements: ① Input voltage: single-phase 220V; ② Output power: single-phase 220V/5KW; ③ Frequency: 50Hz ± 2Hz; ④ Allowable voltage fluctuation range: single-phase 220V ± 15%; 4. Electrical requirements: ① After the correct connection of plug and socket is confirmed to be successful, the circuit that can be opened and closed with load can be closed to supply power to the socket; ② The leakage protection device shall be installed on the incoming side of the power supply cable; ③ The protection of low-voltage distribution equipment and lines shall meet the relevant provisions in the Code for Design of Low Voltage Power Distribution (GB/50053); ④ For the distribution line of IT system, in case of ground fault, the insulation monitoring device shall send out audio or light signals. In case of the second phase to phase ground fault, the fault circuit shall be cut off by the over-current protection appliance or leakage current action protector; ⑤ In the lighting distribution system, the lighting and socket circuits should not be powered by the same circuit.
Guigang Electric Vehicle Maintenance Products
In addition, according to the different ways of energy conversion when charging the electric vehicle battery, charging devices can be divided into contact type and induction type. With the rapid development of power electronics technology and converter control technology, the maturity and popularization of high-precision controllable converter technology, the phased constant current charging mode has been basically replaced by the constant voltage current limiting charging mode with continuous changes in charging current and charging voltage. The constant voltage current limiting charging mode dominates the charging process. The big problem of contact charging is its safety and versatility. In order to make it meet the strict safety charging standard, many measures must be taken in the circuit to enable the charging equipment to charge safely in various environments. Constant voltage current limiting charging and phased constant current charging are both contact charging technologies. New induction charging technology for electric vehicles has developed rapidly.
Guigang Electric Vehicle Maintenance Products
Product features: ■ It has four charging modes: on time, according to electricity, according to amount and automatically. ■ It has human-computer interaction function and adopts color LCD touch screen. ■ Display the current charging mode, time, power, and billing information during charging. ■ It has perfect protection functions for leakage, overcurrent, short circuit, overvoltage, undervoltage, etc; At the same time, it has safety protection functions such as emergency stop switch, flame retardant, anti fall, etc. ■ It has perfect safety protection functions such as connection state judgment, control guidance of charging interface, to ensure safe and reliable operation of charging pile. ■ Provide perfect communication function, upload the operating state parameters of AC charging pile as required, monitor the fault type, charging metering, etc., and accept remote control commands.
Guigang Electric Vehicle Maintenance Products
As the energy supply device of electric vehicle, the charging performance of electric vehicle charging post is related to the service life and charging time of the battery pack. This is also one of the aspects that consumers are most concerned about before buying electric vehicles. It is the basic principle for the design of electric vehicle charger to realize fast, efficient, safe and reasonable power supply for the power battery. In addition, the applicability of the charger to various power batteries should also be considered. The control system of the fast charger consists of: the control system of the fast charger adopts an intelligent variable pulse charging mode, that is, charging current pulse, including charging pulse T1, intermittent pulse T2 and discharge pulse T3.
Guigang Electric Vehicle Maintenance Products
Both the mileage and the number of charging posts have made great progress over the previous years. According to the reporter, at present, the driving range of the mainstream models of new energy vehicles and passenger vehicles in China has reached more than 300 kilometers, which is in line with the international advanced level. The energy density of the single power battery of the leading enterprise has reached 2 watt hours per kilogram, and the price has reached 1.2 yuan per watt hour. These two indicators have respectively increased by two times and decreased by 70% compared with 2012. At the same time, the construction of charging network is progressing steadily, and the coverage of public places, residential quarters, internal units, highways and other major places is increasing significantly. By the end of 2017, 214000 public piles had been built nationwide, an increase of 51% year on year, ranking first in the world in terms of ownership, and the installation rate of new users' private piles exceeded 80%.
