At present, in the new energy vehicle market, major car companies are trying to overcome the technical direction, in fact, there are three main directions:
First, maximize the level of intelligence of the vehicle, including intelligent cockpit and intelligent driving, the latter is more accurately fully autonomous
Second, on the premise of ensuring safety, the energy density of the power battery is raised, so that the endurance of the vehicle becomes higher, and to be more specific, it is to break through 1000 kilometers
Third, further improve charging technology, including speeding up charging, laying supercharging charging piles, etc., because there is no good charging experience, no matter how long the battery life, it is difficult to eliminate the anxiety of users.
So today we will mainly talk about the third point, that is, about the problem of charging. In this regard, BYD is obviously one of the most vocal new energy brands.
Why?We might as well go further through BYD's recent "More than Fast, All-round Evolution - BYD All-Scene Efficient Charging Technology Communication Conference".
The theme of this meeting is very simple, mainly elaborating on the different periods of the development of new energy vehicles, BYD has continuously launched charging solutions that are more in line with the needs of different user pain points.
So what kind of solution is it?After reading it, I believe you will have a more comprehensive understanding of BYD and the charging problem.
User pain point 1: Poor experience of electric vehicles in the early days, low charging efficiency
This user pain point mainly occurs in the early stage of the development of new energy vehicles, and the charging market at this time is mainly based on slow charging, supplemented by fast charging.
In this period, the charging experience of new energy users is generally not very good, and improving the charging speed has become an urgent need for everyone.
So if you want to increase the charging speed, you need to increase the charging power, and according to the simple law of physics: power = voltage x current, if you want to increase the power, you can increase the voltage and current in two ways.
Because the technical difficulty of increasing the current is too great, car companies are basically going in the direction of increasing the voltage.
You must know that the rated voltage of the high-voltage electrical system of most electric vehicles is between 300-500V, and with the development of high-voltage technology, the concept of 800V high voltage has begun to appear.
Regarding this technology, one of the most widely disseminated information on the Internet is that in 2019, Porsche launched the world's first pure electric model with an 800V high-voltage electrical system, the Taycan.
However, this is not the case, because as early as 2015, BYD already had the world's first 800V high-voltage platform for passenger cars, and it was installed on models such as Qin EV (2015 model) and Tang DM (2015 model).
The technology can accelerate to 100 kilometers in 4 seconds, the pure electric range can reach 450km, and the fast charging power is increased to 60kw.
It is worth mentioning that since 95% of the domestic low-voltage piles below 500V were incompatible with the charging of high-voltage models, BYD also pioneered the step-up charging technology.
This technology can make the vehicle no longer limited by the output voltage of the charging pile, and fully adapt to all DC charging piles. To put it more simply, even a 400V charging station can take into account the charging of 800V platform models.
With years of technology accumulation, BYD has completed the layout of full-brand high-voltage platforms, including Han, Tang, Qin, Song, Seal, Denza D9, Denza N7, Equation Leopard Leopard 5, Yangwang U8, etc., all from BYD's latest 800V high-voltage platform.
So don't look at BYD's usual lack of publicity, in fact, it has deep skills in 800V high-voltage platform technology.
User pain point 2: Most fast charging piles are still not charged fast enough
As we all know, in the current charging pile market, the number of fast charging piles far exceeds that of slow charging piles, but you must know that the peak charging power of these mainstream fast charging piles is basically in the range of 60-150kw.
As for those supercharging piles with a charging power of more than 200kw, the number is still very scarce. For example, a model equipped with an 800V high-voltage platform has an official charging power of 480 kW, and the charging time of 10%-80% is less than 15 minutes, but this result can only be achieved by a dedicated charging pile.
In this way, the limitations come out, some people may hope that the supercharging charging pile will be popularized quickly, and the special charging pile can be built on a large scale, which is not only costly, but also needs to build its own line, which is expensive and troublesome, and it is not realistic to popularize it in the short term.
At this time, BYD launched a new charging solution - dual-gun fast charging, as the name suggests, that is, a car uses two charging guns at the same time to charge, and this technology can not change the hardware base of the original public fast charging pile.
800V charging pile or step-up charging technology is to increase the charging power by increasing the voltage, while dual-gun fast charging is to increase the power by increasing the current.
The ultimate goal is also very simple, that is, users do not need to spend time looking for supercharging piles, but directly use the existing public fast charging pile resources of more than one million units.
At present, BYD is equipped with dual-gun charging technology on the DENZA brand, taking DENZA N7 as an example, under the single-** type, the charging power of DENZA N7 is 150KW, and the maximum power of dual-gun overcharging can reach 230KW, which can be charged for 350 kilometers in 15 minutes.
Of course, you may be worried about some problems in practice, such as whether it will preempt the use of other vehicles. For this worry, in fact, it will happen more during the holidays, and it is not a high probability event.
Moreover, BYD also advocates two guns in leisure time and one gun in busy times. So in essence, dual-gun fast charging only provides an additional option for everyone's charging, not a single option.
User pain point 3: The charging efficiency in the north is greatly reduced in winter
In the low temperature environment in winter, it will not only affect the battery life of new energy vehicles, but also reduce the charging efficiency of the vehicle, which I believe tram users in the north feel deeply.
In response to this pain point, BYD pioneered the full-scene intelligent pulse self-heating technology to achieve fast charging of cold cars at extremely low temperatures. To put it simply, the technical principle is that the battery cell uses its own internal resistance to quickly generate heat under the high-frequency alternating current, so as to achieve the purpose of rapid heating of the battery.
In the extremely cold condition of -30, taking the DENZA N7 as an example, 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%.
In addition, in addition to self-heating during charging, self-heating technology can also be intelligently activated in the parking and driving states to ensure the performance of the vehicle at extremely low temperatures.
Write at the end
Through the above introduction, I believe you can understand a core, that is, in the charging solution, BYD is not pursuing a single technical route, or solving the pain points of a certain link, but is committed to opening up all charging links.
800V high-voltage platform, boost technology, dual-gun fast charging, full-scene intelligent pulse self-heating, etc., these technologies can all correspond to different user pain points, but the ultimate goal is only one, that is, to create a safer, faster, and easier charging experience for everyone.