Charge for 5 minutes and drive for 400km. Understand the new generation of ultra-polar charging technology.

On June 19, China Electric Power Enterprise Association, State Grid Corporation, CHAdeMO Agreement Council and Tokyo Electric Power Holding Company jointly held a joint meeting between China and Japan on the new generation of electric vehicle charging technology, and released a white paper on the new generation of ultra-pole charging technology and CHAdeMO3.0 standard.

The new generation of ultra-pole charging technology stems from the high-power charging demand of electric vehicles. It is a complete solution to the DC charging system of electric vehicles, which solves a series of defects and problems existing in the existing charging system in the world, and comprehensively improves the charging safety, charging power, structural design, forward compatibility and future-oriented application. The birth of ultrapole charging technology provides a unified, safe, reliable and low-cost charging system solution for the whole world.

At present, the real vehicle test results show that the maximum charging current of ultra-pole charging technology can reach 360A, and the future goal is that the charging power can reach 900kW, and it only takes 5 minutes to drive 400km, so the charging of electric vehicles will become more convenient and faster. At the same time, due to its compact design and expansibility, supercapacitor can be applied to medium and small power application scenarios, covering the mainstream passenger car field, and taking into account the special requirements of heavy vehicles and light vehicles, thus greatly expanding its application scope.

With the popularization and development of ultrabook charging technology, the car experience of electric vehicle owners will be greatly improved, and many problems such as electric vehicles are afraid to drive long distances and special electric vehicles need special treatment will be gradually solved. In the future, compared with the time to refuel the fuel vehicle, the electric vehicle using ultra-pole charging technology can also be fully charged and ready in the same time.

In the next step, China and Japan will actively work together to create an industrial ecological environment for Chaoji charging technology, and jointly upgrade charging technology and international standards with domestic and foreign automobile manufacturers. Through international cooperation, the new generation of super-charging system will be brought into the international standard, making the super-charging system a global compatible universal standard.

What is Chaoji?

With the large-scale development of China's new energy vehicle industry, the bottlenecks of new energy vehicle safety and charging experience have become increasingly prominent, which has become an important factor restricting the healthy and sustainable development of the industry. At present, poor charging experience is the main problem reflected by users of new energy vehicles, which is characterized by long charging time, poor interconnection and long charging time, which reduces the acceptance of new energy vehicles. Judging from the development of millions to tens of millions of electric vehicles and charging facilities, it is necessary to study and lay out the future development direction of charging technology in advance.

First,? Overview of Chaoji technical scheme

The super-pole charging technology of a new generation of electric vehicles originates from the high-power charging demand of electric vehicles. It is a complete solution of DC charging system for electric vehicles, which solves a series of defects and problems existing in the existing charging system in the world, and comprehensively improves the charging safety, charging power, structural design, forward compatibility and future-oriented application. The birth of ultrapole charging technology provides a unified, safe, reliable and low-cost charging system solution for the whole world. Superpole means faster, safer and more compatible.

Second,? Development course of ultra-polar technical scheme

From 2065438 to March 2006, the Technical Committee for Standardization of Electric Vehicle Charging Facilities in the Energy Industry started the exploration of high-power charging.

2065438+May 2007, the working group of pre-research on high-power charging technology and standard of charging facilities standardization committee was established, and the design idea of high-power charging interface was put forward, and the construction of high-power charging demonstration project was started.

In 20 18, China Electric Power Enterprise Federation and Japan Electric Vehicle Fast Charger Association signed a technical and standard cooperation agreement (CHAdeMO agreement), * * * to promote technical research and international standard formulation in the field of high-power charging;

In 20 19, high-power charging demonstration stations were built in Beijing, Nanjing, Jinan, Xuchang, Shenzhen and Changzhou. The demonstration project adopts high-power charging equipment and liquid-cooled charging gun based on ultra-polar technology, and carries out real vehicle tests on different models such as BAIC, FAW, Audi and Daimler. On July 20 19, the first international conference on new charging interface project held in Tokyo officially named the new generation charging technology proposed by China as super pole, which means faster, safer and more compatible. Experts from China, Japan, Germany, Netherlands, Italy and Australia set up a joint working group to promote the technical research, verification and internationalization of Chaoji project; 20 19- 10, the summary meeting on the pre-research of high-power charging technology and standards for electric vehicles was held in Shanghai, China, which comprehensively demonstrated the research results and was widely recognized by experts from Japan, the United States and Europe.

In March, 2020, State Grid Corporation organized and compiled the "Chaoji Charging Technology White Paper", which comprehensively expounded the technical scheme, future standards and industrial planning of Chaoji charging system, communication protocol and connector. Japan has compiled a new generation charging standard CHAdeMO3.0 based on the same solution. ?

Third,? Ultra-polar technology application scenario

The maximum charging power of Ultrabook can reach 900kW, and the goal of driving 400 kilometers in 5 minutes can be achieved. At the same time, due to its compact design and expansibility, the ultrapole can be applied to small and medium power application scenarios. It not only covers the mainstream passenger car field, but also takes into account the special requirements of heavy vehicles and light vehicles, greatly expanding its application scope.

Fourth,? Ultrabook technical features

Ultrabook charging technology is a global unified charging interface technology for the next generation based on three international mainstream DC charging systems and charging interface technologies. On the basis of full forward compatibility with the original system, considering the future development trend of technology, the conductive charging technology route is upgraded.

1)? Solve existing problems. Ultra-pole charging system has solved the inherent defects in the interface design of the existing version 20 15, such as tolerance fit, IPXXB safety design, electronic lock reliability, PE needle breakage, artificial PE problems and so on. The design of mechanical safety, electrical safety, electric shock prevention, fire prevention and thermal safety has been greatly improved, and the safety and reliability of charging have been improved.

2)? Introduce new applications. Ultra-pole charging system is applied to high-power charging for the first time, and the maximum charging power can be increased to 900kW, which solves the problems of short cruising range and long charging time. At the same time, it provides a new solution for slow charging and accelerates the development of low-power DC charging technology.

3)? Adapt to future development. Ultrabook charging system has also given full consideration to the future technology upgrade, including the adaptability of super power, supporting the application of new technologies such as V2X, information encryption and security authentication, and supporting the communication interface upgrade from CAN to Ethernet in the future, which has reserved upgrade space for super power charging above kiloamps.

4)? Good compatibility, without changing the existing car pile products. The adapter is used to solve the problem of charging the new car to the old pile, avoid the problem of transforming the original equipment and industry, and realize the smooth upgrade of technology.

5)? Connect with the international community and lead the development. During the research of Chaoji charging system, we have conducted in-depth cooperation with experts from Japan, Germany, the Netherlands and other countries in the aspects of charging connector interface, control and guidance circuit, communication protocol, forward and backward compatibility scheme and international standardization, and conducted full discussion and information exchange, which laid the foundation for Chaoji charging scheme to become a widely accepted international standard.

Popularization and application of fried chicken

Gao, an academician of Chinese Academy of Sciences and professor of Tsinghua University, said that the characteristics of Chaoji charging technology are mainly reflected in convenience and compatibility.

Convenience is reflected in fast charging. Our goal now should be to charge for five minutes and last for 200 kilometers, which can meet customers' demand for cars. Of course, fast charging requires us to pay attention to safety and durability. Rapid charging will lead to a sharp drop in the negative potential of the battery and lead to lithium precipitation, which will not only bring life problems, but also bring safety problems. Therefore, we must develop fast charging technology without lithium precipitation and develop new thermal management technology so that our battery will not exceed 45 degrees Celsius no matter how fast. At the same time, low-temperature charging in winter should also be considered. We need to use new fast charging technology to meet our convenience and safety, as well as battery life. The compatibility of Chaoji charging technology is reflected in the compatibility with existing equipment. In the future, our total power will not change, but we will develop the current parallel slow DC charging into series fast charging, only changing our charging method, with good compatibility.

Superpole technology is the result of discussions and international cooperation in many countries. I firmly believe that the development of electric vehicles needs the internationalization of standards, because only in this way can we compete fairly in a fair market environment and promote the popularization of electric vehicles. Charging facilities play a vital role in this process, which will promote the rapid popularization of electric vehicles in China through international standardization.

Charging technology can connect electric vehicles with energy. Through large-scale popularization, our electric vehicles can be used as energy storage devices to solve the problem of large-scale introduction of renewable energy, which will eventually drive our energy transformation and renewable energy revolution and realize low-carbon sustainable development of mankind. ?

Que Shifeng, deputy general manager of State Grid Electric Vehicle Service Co., Ltd. said that the popularization and application of ultra-polar technology is of great significance for improving the rapidity and safety of charging in China, promoting the unified interface of international standards, enhancing the charging experience of users and accelerating the popularization and application of electric vehicles. High-power charging will definitely bring a certain load impact to the power grid, but we have considered this problem, so we will make some optimization and adjustment in the overall scheme and future deployment. We will consider the demand characteristics of regional power grids and distribution networks, and then consider configuring high-power charging equipment. We will also strengthen the interaction between vehicles and the power grid and improve the peak shaving ability of the power grid system. We will also adopt some optical storage technologies. In some places where power supply is needed and there is no power supply, provide some extra distribution network energy and form a good situation of benign interaction with our power grid.

In the whole application of ultra-pole charging technology, it is always important for us to build a perfect industrial ecological environment. We will jointly carry out some technical applications with the OEM, including the next step of upgrading and internationalization, and the compatibility of new and old interfaces, so that the OEM will not form too much pressure in the whole automobile production, realize the smooth transition of using technology to lead the whole charging standard, and ensure its economy and safety.

Nagasaki Tao, chief expert of Tokyo Electric Power Company and president of Business Strategy Research Institute, congratulated Asahi White Paper and Chademo? 3.0 Release of technical documents. She believes that the unification of electric vehicle charging system is not only the long-cherished wish of electric vehicle promoters and the electric vehicle infrastructure industry, because it can be unified and will not waste any existing charging infrastructure, and it is also recognized as the most reasonable solution in the electric vehicle industry. CHAdeMO standard is the only technical document that can make mass-produced electric vehicles have two-way charging function. I am very happy to realize the unification of charging standards through the Ultrabook project. ?

Wang Shengwei, vice president of the passenger car solutions department of Contemporary Ampere Technology Limited, said that to achieve the overall transcendence of new energy vehicles over traditional fuel vehicles, it is necessary to form a rapid breakthrough in two major areas, the first of which is mileage anxiety caused by cruising range. At present, with the rapid development of new energy batteries, the cruising range of the whole vehicle has been rapidly improved. It can be said that the current cruising range is no longer the main contradiction. The second problem is the convenience of use represented by charging time, which is still a big shortcoming of the industry. To realize the application of high-power charging, it needs the cooperation of vehicles, electricity, charging piles and networks, as well as the close cooperation between China and Japan, two new energy powers, to promote the research, formulation and implementation of technical product standard infrastructure.

As a battery manufacturer, Contemporary Ampere Technology Co., Ltd. has rich experience in the research and application of fast-charging lithium-ion batteries, and has successively developed "fast ion rings". Core technologies such as "super electronic network" have greatly improved the fast charging ability of lithium-ion batteries. At present, it can reach the goal of charging 15 minutes and battery life of 400 kilometers. CATL's research on fast-charging lithium-ion batteries can support the application needs of various scenarios at present, from slow charging of low-speed electric vehicles to fast charging of private cars within 40 minutes, operating cars within 30 minutes, and ultra-fast charging of high-end luxury cars and super sports cars 15 minutes, all of which can meet these needs. It can be said that at present, lithium-ion fast-charging battery is not the bottleneck of high-power charging, which can fully support the popularization and application of our project. ?

IEC？ SC23H？ Chairman Gacomo? Scainelli's evaluation of Chaoji's performance in all simulation tests in recent years makes me feel Chaoji. It is the best connector technology at present and represents the technical level of charging connection components of electric vehicles. Superpole may be the prototype of unified DC charging connector in the future. As IEC? Chairman SC23H, I hope this project can enter IEC as soon as possible so that it can be used by the international community. ?

Image source: China Electric Power Enterprise Federation

This article comes from car home, the author of the car manufacturer, and does not represent car home's position.