If you can do it yourself, try not to rely on charging piles"Why doesn't BYD engage in 800v?Why not build a charging station?”
This is a popular question nowadays, but it is also a false proposition.
In fact, 800V technology BYD has been installed in 2015, and the construction of charging stations is also at the forefront of the industry. A few days ago, Ling Heping, vice president of BYD Automotive Engineering Institute, clarified this fact at a technical communication meeting.
Not only that, Ling Heping also showed people that in different periods of the development of new energy vehicles, BYD launched solutions that are more in line with the needs of new energy users and charging conditions, breaking through the bottlenecks faced by the industry and continuing to lead the innovation process of charging technology.
The reason for the aforementioned misunderstanding is related to BYD's unique development path and development concept in charging technology.
Ling Heping said that in the early stage of the development of new energy vehicles, the industry is generally faced with three no-dilemmas: one no charging technology, two no charging infrastructure, and three no charging standards.
In order to solve these development problems, BYD took the lead in achieving a breakthrough in charging technology from 0 to 1, and self-developed AC and DC charging technologies in the household and public sectors at the vehicle end and pile end, providing a reference model for the national standard AC and DC charging standards, and also becoming the first batch of Chinese electric vehicle charging standard drafting units.
BYD's series of technological breakthroughs have given China's new energy vehicle charging technology a root. Ling Heping said.
In response to the pain points of poor experience and low charging efficiency of early electric vehicles, BYD launched an 800V high-voltage platform and step-up charging technology.
Ling Heping said that as early as 2015, BYD's 800V high-voltage platform for passenger cars was installed on models such as Qin EV (2015 model) and Tang DM (2015 model). This technology can accelerate to 100 kilometers in 4 seconds, have a pure electric range of up to 450 kilometers, and increase the fast charging power to 60 kilowatts, improving the user experience in all aspects.
However, BYD does not rely on 800V technology to improve charging efficiency. Ling Heping said that in the environment where there were more low-voltage piles at that time, 800V was actually a surplus of technology. To improve the charging efficiency, it is necessary to adapt to the charging pile.
Therefore, combined with the fact that the domestic charging infrastructure was weak at that time, and 95% of them were low-voltage charging piles below 500V, BYD developed a step-up charging technology to completely realize the compatibility of vehicle piles and fully adapt to all DC charging piles.
It is also this experience that has allowed BYD to form its own unique understanding of charging technology: if you can rely on the vehicle to solve the problem, try not to "trouble" the charging pile.
For example, also in response to user pain points, when the charging efficiency of public fast charging piles is still low, BYD has developed a dual-gun overcharging technology for passenger cars, so that public fast charging piles can become supercharging piles in seconds.
Ling Heping said that at present, there are only 2% of public overcharging piles with a current of more than 300A, and fast charging piles are widely popular, and overcharging piles are extremely scarce.
Ling Heping believes that the uplift scheme proposed by BYD is more suitable for the actual situation of China's charging piles. Taking the DENZA N7 as an example, the maximum power of dual-gun overcharging can reach 230 kW, and the battery life can be supplemented in 15 minutes on the public fast charging pile to achieve 350 kilometers.
Similarly, in response to the pain point of reducing charging efficiency in the northern winter, BYD's approach is to achieve a breakthrough in the industry of fast charging of cold cars at extremely low temperatures through full-scene intelligent pulse self-heating technology.
Taking the DENZA N7 as an example, under the extremely cold condition of -30, the all-scenario intelligent pulse self-heating technology increases the battery heating rate by 230% compared with the traditional solution, and reduces the battery full charging time by 30%, so that users in northern China can also enjoy the fast charging experience in winter.
In addition, this technology can not only self-heat when charging, but also intelligently start the self-heating technology when parking and driving to ensure the performance of the vehicle at extremely low temperatures.
Walking in the forefront of the industry, although there is a sense of superiority of "far ahead", but also to face the general external environment of "opening up wasteland". The unique development process makes BYD accustomed to relying on the technical strength of its own products to adapt to changes in the environment, and relying on a comprehensive technical system to solve the problems in front of it. In Ling Heping's words, it is to "build a charging technology system that is more in line with the current national conditions, and continuously upgrade the user's full-scene charging experience." ”
Text: Yang Zheng.