BYD is too low-key, so that almost no one knows that it is the "first person" of the ultra-800V high-voltage platform for passenger cars in the industry, and does not know that its self-developed AC and DC charging technology in the public domain at the car end and pile end is a model for AC and DC charging of the national standard, and even the double-gun supercharging technology has suffered too many misunderstandings.
However, the fact is that BYD has been continuously introducing solutions that are more in line with the needs of new energy users and the national conditions of charging at different times in the development of new energy vehicles, and has successfully developed five world-first technologies, breaking through the bottleneck of the industry and continuing to lead the innovation process of charging technology.
Less known does not mean that nothing happens, BYD has been a "hero who does not stand in the light" for a long time.
The 800V architecture earlier than Porsche BYD chose to keep a low profile
As a product of the rapid development of new energy vehicles, the 800V high-voltage architecture is often considered to be the first to be mass-produced by Porsche in 2019. Subsequently, the majority of car companies followed up with this technology, and now it has gradually become the mainstream of the market.
In the eyes of many people, BYD is just a follower, and even many outsiders feel that BYD does not have 800V at all.
Who said BYD doesn't have 800v?Ling Heping, vice president of BYD Automotive Engineering Research Institute, said. In fact, BYD not only has, but is also the first car company in the industry to launch a passenger car super 800V high-voltage platform.
In 2015, BYD Tang DM rated voltage 712V, charging termination voltage 820V;Qin EV rated voltage 6336V, charging termination voltage 7524v。This technology can accelerate to 100 kilometers in 4 seconds, have a pure electric range of up to 450 km, and increase the fast charging power to 60 kW.
In other words, BYD's progress in the 800V architecture is 4 years faster than Porsche, but they do big things quietly without too much publicity. Even at that time, 95% of the low-voltage piles below 500V in China were incompatible with the charging of high-voltage models.
In a situation like this, which can be publicized in a high-profile manner but chooses to pass it off, BYD is more than that.
It is the originator of new energy vehicles and the root of new energy charging technology
It is said that BYD is the originator of new energy vehicles, but few people can say what steps it has led the industry forward.
Looking back on the early stage of the development of new energy vehicles, the industry is generally faced with three nos: no charging technology, 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. In 2008, BYD's self-developed AC charging interface came outIn 2010, the self-developed DC charging interface and 50kw DC charging pile (public area) were bornIn 2011, the 10kw DC charging pile (household field) came out;In 2013, 40kw three-phase high-power AC charging pile (public domain) and 33kw wall-mounted AC charging pile (household field) was born.
According to Ling Heping, there is a row of charging piles downstairs in the house of Wang Chuanfu, chairman of BYD shares, which looks at it in an orderly manner, just like a history of the development of BYD charging piles.
These self-developed technologies at the vehicle end and pile end provide a reference model for the national standard AC and DC charging, and have also become the first batch of Chinese electric vehicle charging standard drafting units.
It can be said that BYD has been breaking through the bottleneck of the industry, and China's new energy vehicle charging technology has a "root".
A charging solution that is more in line with national conditions will turn the fast charging pile into a supercharging pile
So having said that, since BYD can show its strength in the 800V architecture, why did it choose the controversial dual-gun supercharging technology at this time?
At the end of the day, the number of supercharging piles is extremely limited. At present, only 2% of public supercharging piles with currents exceeding 300A are available, compared to fast charging piles, which are more widely used.
BYD believes that instead of letting users compete for a very small number of supercharging piles, it is better to make full use of the existing resources of more than one million public fast charging piles.
After all, the waiting time cost of supercharging piles is often higher than that of fast charging piles that are within reach, but the charging time saved is quite limited, and the overall charging time including round-trip driving may be longer than using fast charging piles.
Double-gun overcharging technology is obviously more in line with China's charging national conditions, through the double-gun uplift can make the public fast charging pile not like the supercharging pile, better than the supercharging pile, the maximum power can reach 230kw, and the public fast charging pile can be charged for 350 kilometers in 15 minutes.
Due to the more stringent test of battery thermal management by uplift technology, BYD pioneered the world's first composite direct cooling technology, through the design of straight cold plates on both sides of the battery, as well as two sets of independent control systems for refrigerant, and carried out a compensating flow channel design, the cooling area of the battery was increased by 100%, the heat exchange capacity was increased by more than 85%, and the safety level was greatly improved.
In addition, BYD also greatly reduced the charging efficiency in the northern winter, and pioneered the full-scene intelligent pulse self-heating technology, which realized the fast charging of cold cars at extremely low temperatures for the first time in the industry. Even in the -30 extreme cold conditions, the all-scene intelligent pulse self-heating technology can increase the battery heating rate by 230% compared with the traditional solution, reduce the battery full charge time by 30%, and intelligently start the self-heating technology in the parking and driving states to ensure the performance of the extremely low temperature vehicle.
Whether it is the world's first 800V high-voltage platform and step-up charging technology for passenger cars in 2015, or the world's first dual-gun supercharging technology for passenger cars in 2023, composite direct cooling technology and full-scene intelligent pulse self-heating technology, BYD continues to innovate and develop silently behind the scenes.
By taking stock of BYD's conscientious efforts in technological innovation over the years and the reasons for the construction of the charging system, there is no reason not to understand BYD more and be less prejudiced.