EVCOME EV charging stations for better life---Top EV charging stations manufacturers & suppliers in China.
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EVCOME EV charging stations for better life---Top EV charging stations manufacturers & suppliers in China.
Author: EVCOME-EV Chargers Manufacturers
The design standard of underground garage charging piles should be combined with the construction scale of underground garages to determine the power supply and distribution system design, load calculation, and power distribution charging monitoring system design of electric vehicle charging piles in underground garages. The requirements generally include: 1. Underground garage charging piles General design requirements 1. There are three types of commonly used charging piles: (1) AC charging piles, the power supply adopts 220V AC voltage; (2) DC charging piles, the power supply adopts 380V AC voltage; (3) AC and DC integrated charging piles, power supply The power supply adopts 380V AC voltage. (Remarks: When there are special requirements in the region, the local requirements shall prevail) 2. The charging pile should have functions such as leakage protection, over-under-current, over-under-voltage, and over-temperature protection. 3. The charging pile should have an emergency shutdown function, and the plugging and unplugging of the charging gun should have a protection function. Lightning protection measures should be taken for charging piles installed outdoors. The charging pile should have an automatic wire take-up function to prevent damage to the charging cable caused by improper use. 4. The selected charging piles should meet the relevant requirements of national standards, energy industry standards and enterprise standards of the State Grid Corporation of China, and meet the charging needs of different models. Charging piles should be compatible with the charging functions of new/old national standard electric vehicles. 5. Special electric vehicles need to be equipped with special charging piles, and the owner shall apply to the property and relevant departments for implementation. 2. Power supply and distribution of underground garage charging piles and low-voltage system 1. For newly-built residential parking garages (fields), when designing the electric capacity used for substations, the load capacity of electric vehicle charging piles should be fully considered, and low-voltage power distribution circuits should be reserved. Or reserve the installation location for dedicated transformers and power distribution systems. 2. The load calculation of electric vehicle charging piles should be calculated according to the unit index method based on the number of electric vehicle parking spaces in the scheme design stage. 3. The load calculation of the electric vehicle charging pile should be carried out according to the specific parameters of the charging pile using the need coefficient method, and the value of the need coefficient should meet the relevant requirements of national and local standards. 4. The distribution power supply of the electric vehicle charging pile should be provided with a dedicated circuit for power supply. The power supply circuit of the charging pile should be connected to the residential public transformer distribution system or the non-residential supporting dedicated transformer distribution system according to the requirements of the local power supply bureau. 5. Electric vehicle charging piles should adopt radial power distribution, and the power distribution system should achieve three-phase load balance. 6. Restraining measures should be taken to limit the harmonics of the charging pile power distribution system within the specified range. 7. The wires (cables) and wire tubes of the charging pile distribution line should be selected according to the most economical principle on the premise of meeting national and local standards. The specifications of wires (cables) should not be arbitrarily increased, and the material standards and specifications of wire tubes should not be arbitrarily increased. 8. The illuminance value of the electric vehicle parking area should meet the relevant requirements of national and local standards. 3. Charging pile metering and billing, monitoring and communication system in the underground garage 1. The charging pile should be equipped with metering electric energy meters, and the number of electric energy meters should meet“one pile one table”. The distribution box for the charging pile should be set in a reasonable location according to the electric vehicle parking area divided by the building. 2. The charging pile is equipped with an IC card reading device or code scanning function to realize functions such as charging control and charging billing. The billing standards for charging piles should be implemented in conjunction with the requirements of the local power supply bureau. Charging piles should have multiple settlement methods. 3. The charging pile should be equipped with an Ethernet communication interface or a wireless communication module according to the needs, so as to facilitate the later charging pile network management and network with the relevant management department system. 4. The electric vehicle charging pile monitoring and communication system should be set up according to the actual needs of the project. The monitoring system should monitor and control the status of power supply, power quality, and operating status of power supply equipment. The communication system should be able to communicate with the superior monitoring and management system, accept instructions from the superior monitoring and management system, and upload data to the superior monitoring and management system. 5. The control room of the charging pile monitoring and communication system is included in the property management comprehensive information platform, and no separate control room is set up. 6. According to the product portfolio of the project (high-rise, small high-rise, multi-storey), conduct technical and economic comparison and selection of water supply schemes, and the order of decreasing cost is: frequency conversion pressurization control system with water tank, direct-connected water supply system without negative pressure pipe network, municipal pressure Direct supply, depending on the project situation, you can choose a combination of multiple solutions.
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