If you were to sell a house, would you advertise that the house has doors and windows?
This question seems very low-level, and if a developer does do this, I believe it will be used as a laughing stock. However, in the auto market, a similar situation is not uncommon, and the AEB debate of new power car companies has been hyped on the hot search, and the 800V high-voltage platform has been widely concerned.
In fact, in the eyes of mainstream car companies, these technologies are "basic exercises", because the technology itself serves the user experience, and it does not make much sense to over-publicize the technology itself. But since the gimmick has stirred up the ** heat, we might as well talk about it.
The dust of AEB's controversy has settled, so let's talk about the 800V high-voltage platform that is currently on fire.
Two years ago, Xpeng G9 was launched, saying that it was the first domestic new energy vehicle equipped with an 800V high-voltage platform, and then many new energy brands followed up and hyped their own 800V high-voltage platform.
For a while, it seems that the field of electric vehicle charging has been occupied by these new brands of 800V high-voltage platforms. But is that really the case?
In this regard, BYD said that the 800V high-voltage platform was already available to me as early as 8 years ago, that is, in 2015.
It turned out that as early as 2015, BYD launched the industry's first 800V high-voltage platform for passenger cars, and the 2015 Tang DM, 2015 Qin EV and E5 models that we were familiar with at that time had already applied this technology.
If there is a phrase that is now in vogue, it is - far ahead.
However, the difference is that BYD is far ahead and has not been massively promoted, because they believe that "this is a technical direction to improve the user experience, and the technology itself has nothing to boast about".
Let's take a look at what an 800V high-voltage platform is. Generally speaking, the electrical equipment of an electric vehicle is composed of two parts: high voltage and low voltage, the high voltage system is composed of three electric systems, that is, batteries, motors and electronic control, and the low voltage part is composed of accessories, including light groups, windows, electric seats, vehicle systems and other electrical equipment.
The reason why the 800V high-voltage platform is suddenly popular today is that some car brands have proposed the concept of super fast charging, which means that the charging efficiency can be improved at high voltage, and more electricity can be charged in less time.
After all, for "range anxiety" BEVs, higher charging efficiency means less charging time and less user anxiety.
But the problem is that the charging efficiency depends not only on the technology of car companies, but also on the matching of public charging piles. Even so far, 98% of the public charging piles in China still use the 2015 version of the national standard, the maximum current is only 250A, and the proportion of public charging piles exceeding 300A is only 2%.
Looking back, it is not difficult to understand the situation faced by BYD, as the earliest layout of new energy vehicles in China. In the "wild era" of new energy vehicles, the industry is generally faced with three no-dilemmas: no charging technology, no charging infrastructure, and three no charging standards.
BYD took the lead in achieving a breakthrough in charging technology from 0 to 1. At both the vehicle end and the pile end, BYD has developed its own AC and DC charging technologies for home and public use, providing a reference model for the national standard AC and DC charging standards, and has also become the first batch of Chinese electric vehicle charging standard drafting units.
In order to create a better product experience for electric vehicle users, BYD broke through the technical ceiling of charging, and in 2015, it launched the world's first 800V high-voltage platform for passenger cars, which can accelerate to 100 kilometers in 4 seconds, and the fast charging power is increased to 60KW.
Today, the high-voltage platform has become BYD's basic platform technology, and has completed the layout of the full-brand high-voltage platform, such as Han, Tang, Qin, Song, Seal, Denza D9, Denza N7, Equation Leopard Leopard 5, Yangwang U8 and other representative models are from BYD's latest 800V high-voltage platform.
In other words, BYD was not only the first to achieve an 800V high-voltage platform, but now it has been applied to the entire product line.
Perhaps BYD didn't expect that the 800V high-voltage platform, which it thought was nothing to boast about, would one day become the object of hot speculation in the industry.
As the saying goes, "My foundation is the mountain you look up to."
The domestic charging infrastructure environment has become a bottleneck for users' charging experience, which is one of the reasons why BYD has not promoted the technology on a large scale.
For example, at that time, 95% of the domestic low-voltage piles below 500V were incompatible with the charging of high-voltage models, which affected the charging efficiency. In order to solve this problem, BYD pioneered the world's first step-up charging technology, which completely realizes the compatibility of vehicle piles and fully adapts to all DC charging piles.
But even so far, only 2% of the public supercharging piles with a domestic current of more than 300A are available, and the fast charging piles are widely popular, and the supercharging piles are extremely scarce, which is the status quo in the domestic charging field.
In other words, even if there is an 800V high-voltage platform, users can only hope to win a very small number of supercharging piles, and their product experience can be imagined.
It is precisely because of this that BYD has innovated again in the field of charging and put forward a high-flow scheme in line with China's national conditions: the world's first dual-gun supercharging technology for passenger cars.
That is to say, in the existing situation, blindly increasing the high voltage is not of much significance, it is better to make a fuss from increasing the current, since the market has laid out more than one million fast charging piles, it is better to make full use of this resource. The double-gun overcharging technology allows the public fast charging pile to become a supercharging pile in seconds.
BYD gave an example, such as the Denza N7, the maximum power of dual-gun supercharging can reach 230kW, even on ordinary public fast charging piles, it can achieve a range of 350 kilometers in 15 minutes.
In fact, the benefit of dual gun overcharging is by no means as simple as charging two charging guns together. This is because the technology of increasing the charging current is more stringent than simply increasing the charging voltage and increasing the charging current.
Therefore, BYD pioneered the world's first composite direct cooling technology, which carries out a compensating flow channel design through the design of straight cold plates on both sides of the battery, as well as two sets of independent refrigerant control systems. In this way, the cooling area of the battery is increased by 100%, and the heat exchange capacity is increased by more than 85%, which greatly improves the safety of high-current charging.
At the same time, in response to the cold weather in winter, especially in the northern region, the problem of slow charging efficiency at low temperature in winter, BYD pioneered the full-scene intelligent pulse self-heating technology, and realized the fast charging of cold cars at extremely low temperatures for the first time in the industry.
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 charge time by 30%. Moreover, the technology can not only self-heat when charging, but also intelligently start self-heating in the parking and driving states, so as to fully guarantee the vehicle performance of electric vehicles in a low-temperature environment.
Write at the end:
When the industry was still hyping the 800V high-voltage platform, BYD had already realized the technology 8 years agoWhen the industry is still fighting to increase the charging voltage, BYD took the lead in launching dual-gun charging technology and pioneered the uplift scheme, and when everyone is still arguing that the north is not suitable for electric vehicles in winter, BYD has used full-scene intelligent pulse self-heating technology to keep the battery at a good working temperature at any time.
It can only be said that in the field of new energy, the mountains that some brands look up to, in BYD's view, are just basic exercises.