At this press conference, BYD's technical strength made opponents desperate!

Playing with the car professor

2024-05-11 18:40Published in Guangdong automotive creators

On May 10, BYD held a press conference to announce the official launch of its new car, the Hiace 07 EV. This is a mid-size pure electric SUV with a guide price range of 189,800-239,800 yuan and a CLTC range of up to 610 kilometers. But the above is not the focus of this article, in today's article, we do not intend to briefly analyze the cost performance of this car with you, we hope to focus on the core product point of this car: BYD e platform 3.0 Evo, shown at the press conference, many technical details about this platform, enough to make most friends feel extremely pressured.

Because of this technology platform with the suffix Evo, even those of us in the media are deeply shocked by its technological advancement.

Evolution of basic mechanical structures

The Evo in the E platform 3.0 Evo is literally translated as "evolution", generally speaking, the technology platform uses a suffix like Evo, which is usually some upgrade and evolution on the existing platform, but the technical evolution of the e platform 3.0 Evo, if placed in other car companies, has been completely released as a new technology platform.

Don't underestimate this Evo, it is a rare rarity in the world for its large upgrade and integration of advanced technologies compared to the initial version of the e-platform 3.0. First of all, as a pure electric vehicle platform, the e-platform 3.0 Evo has been greatly upgraded in terms of the most basic body structure design.

First of all, the e-platform 3.0 EVO adopts the main and rear drive architecture, and most family pure electric vehicles will adopt the front drive architecture, on the one hand, the front-wheel drive architecture is conducive to the arrangement of components, and on the other hand, it also uses more common parts, which is beneficial to manufacturing costs, tuning costs and many other aspects. However, the disadvantage is that due to the need to arrange the drive motor at the front axle position, the firewall needs to be moved back appropriately, which not only affects the available space for the front passengers, but also has negative factors for the front impact performance of the whole vehicle.

The main rear-wheel drive layout of the e-platform 3.0 Evo is to place the drive motor on the rear axle. Since the rear axle usually has more space for the large drive motors, and because the front compartment is vacated, this is possible in terms of the design of the front collision avoidance system, the available legroom for the front passengers, and even more storage space. However, changing from the front to the rear of the drive motor is not a simple "position", which requires structural changes to the entire infrastructure.

Thanks to the rear of the drive motor, the safety structure of the steering system of the e-platform 3.0 Evo has also been improved. To put it simply, the rear shift of the motor has effectively improved the structural safety capability of the Hiace 07 EV equipped with the e-platform 3.0 Evo.

However, the big move of the e-platform 3.0 Evo is not only as simple as the rear of the motor, but also its endoskeleton CTB safety architecture is the core. CTB, that is, the integrated design of battery pack and car body, this design greatly improves the available space of the battery compartment, but also brings great challenges to the structural safety design, after all, one of the important features of the traditional independent packaging battery pack is to use the high rigidity of the battery pack itself, which has a strong resistance to external impacts. After the battery cell is directly integrated into the chassis, how to ensure the structural safety of the battery cell body has become a major technical problem.

The implementation of the e-platform 3.0 Evo is actually not complicated in principle, just like the human exoskeleton, the e-platform 3.0 Evo directly makes a reinforcing structure around the battery area on the entire chassis body architecture. With this reinforced structure, on the one hand, it can greatly enhance the structural safety of the battery cell when encountering a strong external impact, on the other hand, because the CTB technology itself is a two-in-one battery cell and car body, this circle is composed of ultra-high-strength materials, and it also plays a very obvious role in improving the rigidity of the vehicle. After such structural improvements, the e-platform 3.0 Evo's models not only have better handling capabilities (which are closely related to the ability to follow the limit and the structural rigidity), but also bring a longer body rigidity maintenance time, which means that the car equipped with the e-platform 3.0 Evo is more durable than other platform cars, and will not squeak everywhere even after many years.

Electric drive, BYD amplified moves!

If the structural improvement of the frame is invisible and intangible, and it may take many years of use to directly reflect the good or bad, then the electric drive part is the most obvious part of the user's perception. And in this regard, the e-platform 3.0 Evo can be said to be a direct move.

First of all, the 12-in-1 intelligent electric drive system, this may not be strong for the user's perception, simply put, the higher the integration of the electric drive control module (that is, how much in one), it means that the same single-chip function can control the more functions, the volume of the entire electric drive control module will become smaller, smaller volume means less calorific value, and more stable long-term operation. The advantage of this is that after many years of use, the electric drive module has a lower probability of error. Or for some high-intensity vehicle use scenarios (such as commercial vehicles), the highly integrated electric drive module will make these commercial vehicles that run hundreds of kilometers a day very stable, even after years of use.

Next is the motor speed, and the 23,000 rpm motor is currently the highest mass production motor. What is motor speed used for? If you want to analyze the technology in depth, this topic can be written in tens of thousands of words, but in short, the higher the speed of the motor, not only can the car run faster, even if you don't need the car to run fast, it can also achieve lower power consumption.

There are also some technical upgrades for the e-platform 3.0 EVO, such as laminated laser welding silicon carbide power modules, various advanced DC fast charging control systems and a number of advanced battery temperature control systems, etc., which basically make the entire electric drive system not only work more efficiently, but also maintain a very stable operation state under long-term use.

BYD's thinking on electric drive system technology

In fact, it can be seen from a lot of technologies equipped with the e-platform 3.0 Evo this time that BYD's technical route for the core system of pure electric vehicles is different from some other domestic car companies. If some other car companies pursue whether the book data looks good or not, BYD's focus is more focused on "whether these technologies can make the car better to drive, and can ensure the performance and experience like a new car after long-term use".

In fact, compared with brushing data, this kind of direct face to the technical bottom of the car is actually the most difficult. In fact, for a long time, in the eyes of users, a very important reason for restricting them from purchasing pure electric vehicles is the low value retention rate, and the fundamental impact of the low value retention rate is that the attenuation of pure electric vehicles after many years of use is worrying.

Compared with hybrid vehicles, pure electric vehicles with energy storage devices that are only lithium batteries are greatly affected by lithium batteries, which are inherently chemically unstable and have rapid natural attenuation. Therefore, in fact, for pure electric vehicles, the focus should be on the optimization of the inherent characteristics of the battery itself in the construction and design of the core system.

To achieve this, car companies themselves need to master a lot of core technologies in the battery field, from the chemical structure of the battery body, to how to control and manage the battery, and so on. This is also one of the biggest advantages of BYD that distinguishes it from other friends. BYD really knows how to manage batteries (after all, BYD itself is born in battery making). Therefore, for the battery, for the core electric drive system, for the various optimizations of the pure electric vehicle structure, although these things are not as "explosive" as an earth-shattering data on the surface, for real users, this is what they need and value the most.

postscript

Therefore, this can actually explain BYD's leading position today. In fact, in the final analysis, BYD really understands what consumers want. And behind this confidence, it is also inseparable from BYD's own technical reserves. BYD is currently extremely rare in the field of new energy vehicles in China, with the ability of the whole industry chain of car companies, but also one of the earliest large-scale new energy vehicles (F3DM) car companies in China, and compared with some of the peers who promoted new energy vehicles together, only BYD's new energy vehicle road has been walking, has never been interrupted.

As a result, BYD now has the country's and even the world's top new energy vehicle industry chain technical reserves. As at the Hiace 07 EV press conference, BYD said that the 800V high-voltage technology that is now hyped in the industry has been developed in 2015. Today's BYD can "do as many volts as you want".

Therefore, the company's technical reserves in the field of new energy vehicles are not too much to describe with the word "horror". To a certain extent, the reserves held by BYD can make many car companies desperate.

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