The Development Prospects of Integrated Electric Vehicle Charging Stations with Light Storage and Charging

The Development Prospects of Integrated Electric Vehicle Charging Stations with Light Storage and Charging.

With the gradual development of the new energy vehicle industry, private purchases of new energy vehicles began to emerge in China in 2014, marking the beginning of the first year of new energy vehicles in China. In 2015, the country entered a year of rapid growth in the new energy vehicle industry, and China also became a new energy vehicle market in this year. In terms of sales, the sales of new energy vehicles in China reached 3.521 million units in 2021, a year-on-year increase of 157.6%. For seven consecutive years, it has ranked first in global sales.

Therefore, in the context of uneven development between electric vehicles and charging stations, the integration of "photovoltaic+energy storage+charging" is gradually expanding towards environmental protection, convenience, safety, and other aspects, becoming an innovative attempt in the construction of electric vehicle charging stations. The integrated photovoltaic storage and charging power station can use the energy storage system to store energy at night. During peak charging periods, the energy storage power station and the power grid work together to supply power to the charging station, which not only achieves peak shaving and valley filling, but also saves distribution capacity expansion costs. At the same time, it can effectively solve the problems of intermittency and instability in new energy generation.

At the same time, the integration of light storage and charging can not only solve the problem of distribution networks in limited land resources, but also flexibly interact with the public power grid as needed and operate relatively independently, using new energy as much as possible, alleviating the impact of charging piles on the power grid. In terms of energy consumption, directly using energy storage batteries to charge power batteries improves energy conversion efficiency.

Photovoltaic system scheme:

The maximum power generated by the photovoltaic system is used for charging piles. When the photovoltaic power generation exceeds the power used by the charging piles, excess electricity is stored in the battery system. When the battery storage capacity reaches its upper limit and there is still redundancy in photovoltaic power generation, the photovoltaic system limits power or stops operating

The core of a photovoltaic storage and charging integrated charging station consists of three parts - photovoltaic power generation, energy storage batteries, and charging piles - forming an integrated photovoltaic storage and charging system
Photovoltaic system: Construct an integrated photovoltaic storage and charging power station under limited land resources, use nearby roofs and parking lot canopies to lay solar photovoltaic panels, and generate green electricity as a supplement to the charging power of new energy vehicles, maximizing the use of clean energy and achieving energy conservation and emission reduction.

Energy storage system: The energy storage system has a battery compartment and an equipment compartment. The battery system is composed of battery modules and clusters based on the minimum unit of a single energy-saving cell, and the battery capacity is configured according to the actual needs on site; Storage inverters (PCS), AC distribution cabinets, DC distribution cabinets, fire protection systems, and EMS&dynamic environmental monitoring cabinets are placed in the equipment compartment. The energy storage system is connected to the AC BUS system to improve energy utilization efficiency, optimize the configuration of electrical energy to achieve a basic balance between local energy and energy load, and flexibly interact with the public power grid according to operational needs and operate relatively independently, alleviating the impact of charging pile electricity on the power grid and solving the problem of power grid expansion in urban rapid charging infrastructure construction.

Charging station: The charging station interacts with users through scanning codes for charging, and the charging station system includes intelligent monitoring and intelligent metering. The intelligent controller of the charging station has the function of measuring and controlling the non protection of the charging station; Communication output configuration: AC intelligent energy meter is used for AC charging measurement, with complete communication function. The measurement information can be uploaded to the charging intelligent controller and network operation platform through RS485. In addition, the charging power can be adjusted, and the input and output overvoltage protection, short circuit protection, overcurrent protection, leakage protection, grounding detection, overheating and other protection functions are complete, with an IP54 protection level.