With a little attention, there are more and more friends driving electric cars around us, and is the charging facility in our daily life perfect enough? Electric cars have developed into a variety of charging technologies, and which charging method is suitable for your electric car. This article will briefly introduce the three parts of charging infrastructure construction, charging costs and charging methods. 
China is already the fastest growing country in charging infrastructure. According to the statistics of charging alliances and public data, at the end of 2016, the number of public charging piles in China was over 150,000, and the number of holdings was the highest in the world.
For the Guangdong province where the editor is located, the number of charging piles ranks second in the country. From the analysis of the number of charging piles in the top ten provincial administrative areas, cities with restricted purchases and restricted lines are more active in the construction of charging infrastructure.
Although the government has issued relevant regulations, the implementation of the supportive electricity price policy for electric vehicle charging and replacing facilities, and the implementation of government-guided price management for electric vehicle charging and replacement service fees, but the price of electricity and services is relatively incomparable. the same.
It is understood that the charging service fee in Jiangxi Province is the highest in the country, 1.723 yuan / kWh; the charging service fee in Chongqing is the lowest in the country, 0.336 yuan / kWh.
The following table is to edit the price of charging and charging service fees according to the data, and see what the charging cost of your city will be.
In addition, according to the “Guidelines for the Development of Electric Vehicle Charging Infrastructure (2015-2020)â€, by 2020, more than 12,000 centralized charging and replacement stations will be added in China, and more than 4.8 million decentralized charging piles will be installed. The “mileage anxiety†of the owner who chose the electric car may be alleviated.
After talking about the basic situation of the charging infrastructure, let's take a closer look at the current four mainstream charging methods (charging technology), which is related to the convenience of the car after purchasing electric cars. In order to make the life of the car more convenient, we also try to choose a model with mature charging technology, high popularity and convenient use.
1. AC charging method available at home for longer charging time
AC charging (or household electric charging) generally refers to the way in which single-phase or three-phase alternating current is converted to a suitable voltage by means of rectification, filtering, power factor correction, and then charging the power battery.
The AC charging post utilizes a standard charging interface that uses a conductive method to charge the battery. Due to the constant current or constant current of a smaller current, the charging time is generally 5-8 hours and up to 30 hours.
Therefore, this method is generally applicable to the charging of a vehicle with a long downtime (mostly nighttime). For example, charge overnight in your own parking space or use the car charging device to charge.
The AC charging method is suitable for non-operating, designing electric vehicles with long cruising range and plug-in hybrid vehicles. For example, Chuanqi GS4 PHEV, BYD Song DM, BMW X1 PHEV and other models.
2. Most of the public charging piles use DC charging technology. The charging speed is fast and takes a short time.
30kW DC fast charging and charging pile
DC charging refers to a charging method that converts the AC power of the grid into a DC power source through a DC charging pile and directly charges the power battery through the charging connection device.
The charging current of this mode is generally 150-250A. At present, DC charging is mostly applied to urban public charging facilities and inter-city high-speed service area charging stations. The pure electric vehicles in the market support AC slow charging and DC fast charging. the way.
3. The bus industry is the first to use the power-changing technology to compare the fueling convenience of fuel vehicles.
The power-changing technology is an endurance mode in which electric vehicles can reach the speed of refueling with conventional fuel vehicles. It has been realized in the field of public transportation and logistics.
The technology enables faster battery replacement through fully automatic or semi-automatic mechanical equipment, and the electric vehicle is recharged by means of battery replacement.
Under normal circumstances, the battery replacement time can be completed in 2-10 minutes, which is comparable to the time required for the gasoline car to go to the gas station to refuel.
Taking Guangzhou, the city where the editor is located, as an example, on November 29, Beiqi New Energy delivered 200 sets of electric taxis to Guangzhou and put them into operation, which was the first to open the curtain for exchange.
The newly-built standard power station only covers an area of ​​200 square meters, and the main body is composed of containers, which greatly saves land resources. It is understood that one such power station can serve more than 150 vehicles per day. At the same time, the power station can also use the city's peaks and troughs to make better use of energy.
Editors interviewed Li Yixiu, general manager of BAIC New Energy Marketing Co., Ltd., learned that BAIC New Energy Co., Ltd. has invested a total of 10 billion yuan to launch the “Optimus Prime Planâ€, which will establish a nationwide energy Internet centered on optical energy storage and power stations nationwide. In the future, 3,000 optical storage and power stations will be built nationwide, 500,000 vehicles will be operated, and 5Gwh will be used for energy storage batteries.
In the future, the brother or private car owner who drives the electric car can quickly change the power travel within 2-10 minutes, and no longer have to delay his travel time in order to wait for the charge.
4, wireless charging technology is as convenient as charging a mobile phone, but the popularity is not high
Charging the electric car battery does not have to be connected by cable. The mobile phone has already realized the wireless charging function. It is impossible to charge the electric car battery.
Wireless charging technology is based on the principle of electromagnetic induction, wireless transmission of electrical energy in a certain space.
It is understood that many car companies and third-party technology companies have developed wireless charging technology. For example, Nissan's wireless charging system developed for the company and the Halo wireless charging system technology developed by Qualcomm are relatively mature.
Listening to the wind for wireless charging
In China, ZTE has joined hands with Dongfeng Motor, Yutong Bus, and Yudu Bus to cooperate in the field of wireless charging. This has also become a typical case of domestic electronic technology companies and car companies to develop new charging technologies.
In 2014, ZTE Corporation joined hands with Dongfeng Motor to launch the world's first wireless charging bus commercial demonstration line.
However, wireless charging has higher requirements on technology, and charging efficiency is closely related to coil size and distance. As the distance between the coils increases, the energy transfer efficiency gradually decreases.
It is understood that at this stage, wireless charging equipment should achieve more than 90% efficiency, and the effective distance is generally between 15 and 25 cm. Therefore, for models with too high chassis, it is not suitable for wireless charging, which has a great impact on the popularity of wireless charging.
Written in the end: It is foreseeable that in the next five years, with the country's vigorous promotion of charging infrastructure, inter-city fast charging networks will be built in major cities across the country, and interconnection will be realized. At that time, the problem of rare charging or permission will be alleviated. . In addition, with the continuous upgrading of technology, the problem of charging life of electric vehicles in the future may not be a problem.
Lithium Lon Battery,Lithium Ion Battery Charger,Lithium Ion Battery 12V,Lithium Ion Battery Rechargeable
Langrui Energy (Shenzhen) Co.,Ltd , https://www.langruibattery.com