A rising star in the new energy industry! Integration of optical storage and charging is about to emerge

Policy empowerment, carry out the pilot application of "light storage, charging and discharging" charging stations

In order to support the high-end electric vehicle industry Quality development helps achieve the goal of "carbon peaking and carbon neutrality". On November 21, the Shaanxi Development and Reform Commission issued the "Implementation Opinions on Further Improving the Service Guarantee Capacity of Electric Vehicle Charging Infrastructure in Shaanxi Province" (hereinafter referred to as the "Opinions").

The opinions mentioned that power grid companies and social forces should be supported to build vehicle-to-grid (V2G) charging station pilot projects in Xixian New Area and accelerate V2G pilot testing. and standardization system construction to promote efficient interaction between electric vehicles and grid energy. Carry out technological innovation and pilot application of "optical storage, charging and discharging" charging stations in Xixian New Area and Xi'an Industrial Park.

Promote the collaborative interaction between electric vehicles and the power grid. Carry out the construction of intelligent and orderly charging demonstration communities, and strive to achieve one intelligent and orderly charging demonstration community in each city by 2023, and gradually promote it based on summarizing experience.

In addition, by the end of the "14th Five-Year Plan", the coverage rate of charging infrastructure in highway service areas will reach 100%; 100% of new residential communities will have charging facilities or reserve installation conditions; promote Shaanxi With the application of smart car networking platform, the charging pile access rate reaches 100%.

Not only that, the Sichuan Provincial Development and Reform Commission issued a notice on November 25th, "Sichuan Province's Implementation Plan for Promoting the Construction of Electric Vehicle Charging Infrastructure" to promote friendly interaction between cars and the Internet.

Actively promote smart and orderly charging, implement peak and valley electricity price policies for charging facilities, and guide residents to choose charging facilities with smart and orderly charging functions to participate in smart and orderly charging . Priority will be given to selecting qualified communities in Chengdu and other regions to carry out pilot demonstrations, and gradually increase the proportion of intelligent and orderly charging facilities. Explore the application of integrated pilot projects for "optical storage, charging and discharge"Use it to promote the development of the (V2G) modeland encourage electric vehicles to serve as flexible energy storage devices and actively participate in the regulation of the power system.

Upstream and downstream manufacturers are involved in the construction of integrated photovoltaic storage and charging

Integrated photovoltaic storage and charging, that is, photovoltaic power generation + electric energy The integrated and coordinated green charging mode of storage + vehicle charging can realize peak shaving and valley filling by configuring the energy storage system to maintain the stability of the power grid, and then provide "green power" for new energy vehicles through charging piles. , effectively alleviate the impact of large-scale charging pile electricity consumption on the local power grid. Based on the integrated light storage and charging system, it can reduce the use of traditional energy, reduce polluting gas emissions, improve energy utilization, and achieve long-term sustainable economic benefits.

In the first half of 2022, the number of new energy vehicles in my country has exceeded 10 million, and industrial development has begun to take shape. According to Huang Xueliang, a professor at the School of Electrical Engineering of Southeast University, the number of new energy vehicles in my country will reach 83 million in 2030, and the equivalent energy storage capacity will reach 5 billion kilowatt hours. By then, vehicle charging demand will account for 6% of social electricity consumption. ~7%, and the maximum charging load will account for 11% to 12% of the grid load. It is particularly important to deploy the integration of light, storage and charging in advance to alleviate the grid load.

In fact, in the automotive industry, car companies such as Tesla, power batteries such as CATL, and charging operators such as Te Laidian, Star Charging and other upstream and downstream enterprises in the industry chain have all joined in. To the construction of integrated optical storage and charging.

On October 17 this year, the “Ningde Lithium Battery Town Optical Storage Charging and Inspection Intelligent Supercharging Station” developed by CATL was officially put into operation. Internet technology, a standardized intelligent supercharging station that integrates charging piles, energy storage, photovoltaic cells and battery testing.

It is reported that the total area of ​​the station is 2,100 square meters, which can meet the needs of 20 new energy vehicles at the same time to recharge about 200 kilometers of battery life in 7 to 8 minutes. The supercharging station is mainly composed of photovoltaic systems, energy storage battery systems, new energy vehicle charging piles, battery online detection systems, smart energy management cloud platforms, etc. It has the characteristics of flexible location selection, short construction period, and no need to modify the distribution network. The main advantages are: Peak shaving, the energy storage system can transfer low-carbon electric energy from the low periods of the power grid to peak periods for use; Low cost, photovoltaic power generation has less electricity cost, overallLower than the cost of purchasing electricity from the grid.

Faced with the huge market for the integrated optical storage and charging model, domestic facility construction is also on the agenda. CATL and COSTAR established a joint venture to produce products related to the integration of "optical storage and charging"; Trina Solar and Sinopec joined hands to cooperate in the fields of integrated optical storage and charging; Terad has built optical storage in many places across the country. Charging microgrid power station.

Problems with the integration of optical storage and charging

How much does the integration of optical storage and charging cost? According to Huayu Electric Energy's calculations, take 50KW photovoltaics, 200kwh energy storage, and 6 charging piles as an example. There are 110 monocrystalline silicon photovoltaic panels of 455W, with a conversion efficiency of 20%. The total installed capacity of photovoltaic modules is 50050W, and the daily power generation of photovoltaic modules is 250kwh. The carport has a total area of ​​220 square meters, a total of 12 parking spaces (a single parking space is 3 meters * 6 meters), plus other auxiliary materials (combination box, distribution box, cables, carport steel structure, etc.), the total cost of photovoltaic power generation is 300,000 yuan about.

The 200kw energy storage battery requires lithium iron phosphate batteries, a complete system protection PCS, fire protection, containers and other materials, with a total cost of about 650,000 yuan. In addition, the cost of six 60kw dual-gun charging piles and supporting cables is about 230,000 yuan. To sum up, the total cost of the integration of optical storage and charging is about 1.18 million yuan (the above cost does not include tax, freight and construction).

Generally speaking, the integration of light, storage and charging is still in its early stages of development, and the investment payback period for a single charging station is about 5 to 6 years. The difficulties facing the integration of optical storage and charging include high construction costs and long investment recovery periods. Safety issues cannot be ignored.

In the integrated light storage and charging station, the photovoltaic grid-connected power generation system is an extremely important component. It is composed of photovoltaic panel array, junction box, inverter, etc. The core of the system is the photovoltaic grid-connected inverter. While the photovoltaic system generates electricity, it will also cause leakage current problems. Electricity leakage is directly related to charging vehicles, power grids and personal safety. Once leakage occurs, the consequences will be disastrous.

The integration of light, storage and charging is an important technology and basic equipment for building a new power system, and is also a key support for achieving the "double carbon" goal. Safety is an important prerequisite for the development of integrated photovoltaic, storage and charging Strengthening the safety management of power stations is of great significance to building a new power system and achieving the "double carbon" goal.

Summary:

At present, there is still a long way to go before the integrated construction of optical storage and charging can be widely promoted and applied to form a certain market scale. This requires the promotion of superstructures such as the national and local governments, and also requires the concerted efforts of upstream and downstream enterprises to actively participate in it. After solving the cost, technology and safety issues, based on the increasing number of new energy vehicles, it is expected that the integration of light storage and charging will usher in a period of rapid development.