SINCE BYD entered the automotive industry in 2003, it has been committed to the research and development of electric vehicles. In the 18-year journey of electrification, pure electricity technology has undergone three major iterations.
The first generation of e-platform 1.0 breaks through the integration technology of pure electric vehicles, high-power drive system technology, and high-power battery group technology. e Platform 1.0 realizes the platformization of the key components of the three electric vehicles, and at the same time realizes the breakthrough of the core technology of pure electric vehicles. On this platform, BYD mainly built the first generation of pure electric vehicle e6, which is BYD's pioneering product in the field of passenger car electrification. The second generation is BYD e Platform 2.0, which for the first time has undergone extensive integration. Therefore, after the launch of the e-platform 2.0, BYD has realized the platformization of the key systems of the whole vehicle to meet the needs of diversification and electrification. Platform 2.0 has created a series of products and supported BYD to become the first platform in China to sell 1 million new energy vehicles.
New mode Innovative platform
With the innovation dimension of parts and components has no way to meet the increasingly high demand for new energy vehicles, the new demand allows the main engine factory to understand the parts in addition to the whole vehicle, but also to have the ability to both design and manufacture. In this context, since the advent of BYD's first electric vehicle, it has built a very comprehensive design and manufacturing capability. In addition to vehicle integration, it has also created the design and manufacturing capabilities of the whole industry chain from materials, components, systems, controls to vehicle integration.
Based on the capabilities of the whole industry chain, AFTER several years of innovation, BYD has launched e-platform 3.0, which mainly has four major characteristics: safety, efficiency, intelligence and aesthetics.
Security is the most basic requirement
On the e-platform 3.0, BYD further integrates the body and battery to empower the safety of the whole vehicle.
First of all, BYD launched a blade battery last year, which has a very large innovative effect on the structure of the power battery field. The battery is an LFP system, which is a safer and more stable material system from the material itself. At the same time, the blade battery has the characteristics of high rigidity, which will further strengthen the safety of the whole vehicle; in addition, the blade battery can greatly increase the battery density and greatly improve the utilization rate.
Secondly, in the design of the pure electric platform, BYD has made some exclusive transmission path optimization for the characteristics of electric vehicles to improve the safety of the whole vehicle. For example, BYD's standard full-frame subframe makes the transmission of the beams and longitudinal beams of the body very smooth, further strengthening the safety of the vehicle.
Finally, the blade battery itself has high rigidity characteristics, and when it is further integrated with the vehicle design, it can further improve the safety of the whole vehicle, so that BYD's new generation of e-platform 3.0 basically has five-star safety capabilities. When the body and the battery are further integrated, the stiffness of the whole vehicle is further improved, and the driving experience of the whole vehicle is also better improved.
Efficient experience in all scenarios
Now there is basically no problem with the endurance at room temperature, but the primary problem is whether it can be efficient in all scenarios, such as whether it can achieve the same endurance as room temperature in a low temperature environment. In this regard, BYD has several considerations.
First, the overall drive system innovation, BYD has established a full-level efficient system, from the vehicle resistance decomposition to the system level, and then to the parts, through layer after layer of resistance decomposition, layer by layer of optimization of parts, optimization of the system, optimization of vehicle resistance.
Second, in terms of drive system, BYD uses the industry's very popular power density and efficiency to further improve, in terms of electronic control, BYD uses silicon carbide electronic control, so that the electronic control efficiency, overcurrent capacity to achieve greater improvement.
Third, in the reducer, in addition to the structural design optimization of the reducer, BYD is also thinking about how to ensure the fluidity of the low-temperature oil, improve the efficiency of lubrication, and further improve the efficiency of the reducer.
In addition to optimization at the component level, BYD has innovated at the system level, BYD's latest eight-in-one electric drive, which integrates the entire motor, electronic control, reducer, DC, OBC, power distribution, VCU and BMC.
Through integration, more space can be given to the occupants in the car. After BYD's eight-in-one integration, the volume is reduced by about 20%, the overall weight is reduced by 15%, and the weight reduction also further reduces the energy consumption of the vehicle.
The second aspect that affects the energy consumption of electric vehicles is the thermal management system. BYD e platform 3.0 has been innovated, developed a new heat pump structure, which mainly has several innovative points, BYD has carried out the integration of heat pump and battery heat management, through the battery's direct cooling direct heat technology, the refrigerant is sent directly to the battery, and the thermal cycle is more direct to improve efficiency.
The third is charging. High voltage system is an important development direction of the industry, BYD in the very early mass production of high voltage programs, and established a sound high voltage industry chain, for high-voltage models in the 500V below the charging pile charging compatibility problem, BYD innovated the electric drive boost charging program, through the multiple power control of the IGBT and the motor inductance to form a boost circuit, because the motor is not working when charging, at this time you can reuse these parts, further improve the overall efficiency, while reducing costs.
BYD continues to explore the boundaries of automotive intelligence and aesthetics
In terms of the entire architecture, BYD has also developed a new intelligent domain control architecture in the e-platform 3.0, which includes an intelligent car control domain and an intelligent driving domain, which are under development one after another. At the same time, BYD has also created the BYD OS operating system, which further realizes the coupling of software and hardware, and further improves the efficiency of OTA.
Jiang Long, director of pure electric platform of BYD Automotive Engineering Research Institute
Through the optimized integration design of e-platform 3.0, the integration of electric drive can release more front cabin space. Through the innovation of blade batteries, the thickness of the battery is further reduced, and the space inside the car is further released, which makes the aesthetics of electric vehicles have more space. Secondly, through the space release of electric drive and battery, e-platform 3.0 also brings users a better cross-level space experience. Finally, the expansion, e platform 3.0 can expand the car, SUV and other different forms of models, to achieve high scalability.
Jiang Long, director of pure electric platform of BYD Automotive Engineering Research Institute, said that BYD e platform 3.0 has developed different subdivision platforms for compact cars, medium-sized cars and large cars. On the compact platform, the first car Dolphin has been listed in 2021, the current market recognition is high, the next car will be listed after the auto show debut, in 2022 there will be a series of models to meet users.