Electric vehicle charging blockchain

1. The application cases of Chongqing jinwowo analysis blockchain technology in the energy field are as follows:

1. Electric vehicle solutions, such as distributed charging piles and shared cars< Establish a personal energy system, buy and sell electricity, solar energy, gas and other energy

3. Support community energy model, battery management, and build an energy-saving power pool

4. Connect energy buyers with operators of renewable energy systems.

2. (1) Building security consensus 2) Create a trusted environment 3) Put an end to the invasion of computing power 4) Preventing value spillover 5) Protect the rights and interests of miners.

3. Altxun (002227): V2G automotive charging platform: the company is the largest manufacturer of DC operating power supply, and the high-frequency intelligent charging mole is a mature proct for the company. The 400V * 30A high-power high-frequency intelligent charging mole of the company has significant advantages in recing the number of moles and saving the land occupation and purchase cost of charging station when delivering the same power. In cooperation with China Southern Power Grid, the company has completed the equipment supply of Shenzhen Universiade center, two electric vehicle charging stations and 134 charging piles, which has outstanding first mover advantages<

powersource (600405): Shenzhen Power Energy Technology Co., Ltd., a wholly-owned subsidiary of the company, has independently developed and proced a series of procts such as electric vehicle charging station equipment and charging cabinet, charging pile and charging monitoring system, power battery and energy storage battery management system<

Wanma cable (002276): Zhejiang Wanma new energy Co., Ltd. was established by joint investment with the controlling shareholder Wanma group, of which the company accounted for 70%. The company's move is intended to enter the field of electric vehicle charging cables, charging piles, chargers and related supporting equipment, and is committed to providing overall solutions for electric vehicle charging stations, so as to promote the further development of the company in the field of smart grid and improve the company's comprehensive competitiveness<

Shanghai Putian (600680): on November 8, 2011, the company announced that it plans to change the use of 345031200 yuan of the remaining funds raised by non-public offering in 2008, of which 322335400 yuan will be used to increase the capital of Shanghai Putian Information Technology Co., Ltd., and the capital will be invested in the new energy charging terminal system integration project and supporting facilities, It is mainly engaged in the R & D, proction and sales of new energy vehicle slow charging terminal system and fast charging terminal system and other charging station supporting equipment procts

Nari (600406): in March 2010, Nari Technology Co., Ltd. started the construction project of electric vehicle charging facilities, actively participated in the construction of electric vehicle charging and discharging power station of State Grid and provided technical support. The project has good promotion and application prospects, and will become one of the most important applications of smart grid in the future. It is understood that Nari has carried out a lot of work in the typical design of electric vehicle charging facilities, research and development of key equipment, technical consulting services, and implementation of pilot projects. It has successfully developed the monitoring system, AC charging pile, and billing system of electric vehicle charging station. The company is the main force in the construction of charging station under the State Grid, It has participated in the construction of several "typical design demonstration charging stations of State Grid", such as Nanhu charging station in Tangshan, which was completed and put into operation on March 31, and Wuzhou road electric vehicle charging station in Yangzhou on April 19, It can be put on the market. The successful development of the proct will further consolidate the company's dominant position in this field and enhance its technological innovation ability and core competitiveness. The company has successfully won the bid for the first batch of electric vehicle charging station projects in Shenzhen, providing DC chargers and AC charging piles for the charging station, and the procts have been put into operation in Shenzhen Universiade, exhibition center and airport. At the same time, the company's procts are also winning the bid in the overall project of Zhongshan electric vehicle charging station<

Jiuzhou electric (300040): through the joint venture of Ningbo Jiuzhou Shengbao power supply Co., Ltd., the company has extended its proct line to the field of electric vehicle power batteries and charging devices, and high-power energy storage batteries“ "Jiuzhou Shengbao" is currently developing a high efficiency battery charger, which will greatly shorten the charging time and can be used for short-term instant charging of electric vehicles<

Shanghai Electric Power (600021): this year, Shanghai electric power will build 9 new electric vehicle charging stations and 1100 AC charging piles, playing a leading role in Shanghai electric vehicle charging service market<

Guodian Nanzi (600268): another listed company of Guodian, some procts are bound to be applied to the construction of charging stations and participate in the construction of multiple charging stations

Nanyang Co., Ltd. (002212): Three & quot; A DC charging cable for electric vehicle & quot; And two & quot; A kind of electric vehicle AC charging cable & quot; The utility model patent has recently obtained the certificate issued by the State Intellectual Property Office“ In 2011, the company will contribute an operating revenue of 837 million yuan and a corresponding net profit of about 137 million yuan, which will become the highlight of the company's future performance growth. The special cable project for rail transit and the new energy, marine and frequency conversion energy-saving special cable project are being implemented as planned<

Zhongheng electric (002364): the company's participation in the construction of electric vehicle charging station mainly focuses on the charger, which is a kind of proct similar to the electric power operation power supply proct. The short-term profit contribution of electric vehicle charger proct is small. At present, the development situation is good, and many local governments are vigorously promoting it

Rongxin Co., Ltd. (002123): the high and low voltage filter procts of Rongxin Co., Ltd. are applied in the construction of charging station<

Senyuan electric (002358): the complete set of active filter devices and electrical procts are applied in the construction of charging station

Siyuan electric (002028): some procts of Siyuan electric are used in the construction of charging station

Baoguang Co., Ltd. (600379): some procts are used in the construction of charging station

Baili electric (600468): some procts are used in the construction of charging station

Shenzhen Huicheng (002168): some procts are used in the construction of charging station

XJ electric (000400): the business of electric vehicle charging station is carried out by XJ power supply Co., Ltd., the holding subsidiary of XJ Group Co., Ltd., which is the controlling shareholder of the company. It is reported that XJ electric previously announced that the project of non-public offering of shares to purchase assets includes 75% equity of XJ power supply Co., Ltd. held by XJ Group Co., Ltd. the work of non-public offering of shares to purchase assets is currently under the approval of CSRC. XJ Electric said that the business of electric vehicle charging station is one of the newly expanded businesses of XJ power supply Co., Ltd. on the basis of its original business fields such as DC operating power supply. At present, the business is still in its infancy, and its procts include: AC charging pile, off board charger, off board charging and discharging device, on-board charger and evc-8000 electric vehicle charging and discharging power station solution.

4. At present, most electric vehicles can be charged at home
generally, there are two types: low-voltage slow charging and high-voltage fast charging
low voltage slow charging can be charged directly by using civil 220 V voltage, which is slow and has less damage to the battery system, so it is suitable for overnight charging after going home
high voltage fast charging generally uses high-voltage electricity. Now in big cities where pure electric vehicles are promoted, there will be some pilot charging stations, similar to gas stations, which use high-voltage fast charging. For example, BYD E6 can charge 80% in 15 minutes
of course, you can charge quickly at home, but you need a charging station, similar to a very large transformer.

5. List of concept stocks and listed companies of electric vehicle charging pile:

(I) suppliers of charging machine and charging pile equipment
[1] aotexin (002227)
[2] Zhongheng electric (002364)
[3] power source (600405)
[4] Shanghai Putian (600680)
[5] Jiuzhou electric (300040)
[6] Kelu electronic (002121)
[7] Guodian Nari (600406)
[5] Guodian[ 8] Xuji Electric (000400)
(2) cable

[1] Wanma cable (002276)
[2] Nanyang stock (002212)

source: Fortune winner.com

6. The charging modes of electric vehicles are mainly divided into three modes: fast charging, slow charging and power changing. Slow charging mode: low current is used to charge the vehicle power battery, and the charging time is generally more than 3 hours. The advantages are low charging current and power, less impact on battery life and power grid; The disadvantage is that the charging time of electric vehicles is long, and it is difficult to meet the demand of emergency power supply

fast charging mode: it provides short-term fast charging service for electric vehicles with large current within 20 minutes to 2 hours of parking. The utility model has the advantages of improving the charging efficiency of the electric vehicle and saving time; The disadvantage is the huge current impact on the power battery pack, which will rece the cycle life of the power battery pack, and the cost of the battery pack is relatively high

power change mode: directly replace the exhausted battery pack with the fully charged battery pack, the replacement time is about 10 minutes, and the power supplement time is the shortest. The advantages are that it can quickly replenish energy, overcome the problems of short battery range, and do not need large-scale and high-density charging facilities in cities; The disadvantage is that its technology is not mature, and it is safe and reliable.

7. In terms of charging power, the charging pile can charge according to the maximum power of on-board charger, and the charging power of ordinary socket equipment is generally about 2 ~ 3.5kw; In terms of charging safety, the charging pile has the functions of leakage, lightning protection and waterproof, while the ordinary socket does not necessarily have these protection functions; In addition, the charging pile can communicate with the vehicle. If there is a fault, the charging current can be interrupted in time.

8. First, the choice of charging location. Wireless charging technology is related to the distance and state of the charger and the charged equipment, that is to say, the distance between the two should not be too large, and there is no relative movement between the two, otherwise it will not be able to transmit power stably and effectively. Therefore, the charging location can only be the place where the car stays, that is, the garage, parking lot, intersection and other locations, and the charging device of the bus can also be set on the bus website. Of course, where conditions permit, charging stations can also be set up beside expressways to facilitate the charging of vehicles
secondly, the choice of charging mode. From the three charging methods, we can see that the distance required for electromagnetic inction charging is too small, the efficiency of radio wave charging is too low, and the distance and efficiency of electromagnetic resonance charging can meet the needs of battery vehicles
finally, the choice of rechargeable battery. Electric vehicles will be charged at any time in the city, so it is necessary to choose batteries without pollution and memory effect for charging.

9. If you want to open a charging station, there are many things to prepare
1. How many electric vehicles are charging outside? Electric vehicles are short-range, and most of them should be charging at home
2. What is the voltage of the electric and gas vehicles, such as 48V, 60V, 72V, etc. it is not possible to have a charging pile for each vehicle
3. Is there a multi-functional charging point, that is, 48V, 60V, 72V electric vehicles can be charged, or semi-automatic
4. The charging power cost, equipment cost, labor cost, site cost and so on are very high. Can we do business
5, it seems that the risk is also great, which needs careful consideration.