Foreword: "In 2025, the Chang'an brand will achieve a proportion of 35% of new energy sales, and by 2030, this proportion will be further increased to 60%. At the recent Changan Automobile Global Partner Conference, Changan Automobile officially released the new energy vehicle brand Deep Blue and set a radical new energy sales target.
A week later, Changan New Energy once again held a press conference, and the special platform for electric drive in the form of multi-energy supplementation - Changan Deep Blue All-Electric Digital Platform was officially released. The all-electric digital platform redefines the leading position of the three-electric system through deep integration of All in One, safer and more efficient, and at the same time solves user pain points such as endurance, energy replenishment, and safety, and can meet users' imagination of beautiful travel through efficient environmental protection, digital experience, and ultimate performance.
Regarding the original intention of building this platform, Deng Chenghao, CEO of Chongqing Changan New Energy Automobile Technology Co., Ltd., said that in 2017, China's new energy market was still cold, and only 6.2% of users could accept new energy vehicles, and even 40% of users did not know what new energy vehicles were.
"This deeply hurts the heart of each of our new energy practitioners", Deng Chenghao further said: "Based on this, we are determined to make a new pure electric drive dedicated platform with completely independent intellectual property rights and positive design, and it will extend a series of pure electric drive special products to improve consumers' inherent impression of new energy vehicles." ”
As we all know, electric vehicles have three major industry pain points, namely short endurance, slow energy replenishment and safety doubts, and to solve these pain points, the most fundamental occurrence is to improve system efficiency. In order to improve the system efficiency of the EPA1 platform, Changan New Energy has proposed its own original solutions from the three dimensions of electric drive system, extended range system and hydrogen fuel system.
First of all, Changan Automobile brings the concept of electric efficiency of the powertrain. Deng Chenghao believes that the electrical efficiency reflects the comprehensive driving efficiency of the new energy power system, which is equivalent to the net output of the electric drive system divided by the power consumption of the power grid. Electrical efficiency includes many comprehensive factors such as charging system efficiency, battery system charge and discharge efficiency, electric drive system efficiency, energy recovery system efficiency (extender range and hydrogen fuel cell vehicles have one more power generation efficiency index), which reflects the energy efficiency level of the power system that users can intuitively feel. Changan Automobile gave a set of data, the current mainstream electrical efficiency in the industry is basically between 70% and 75%, and the optimized electrical efficiency of Changan New Energy can reach 78%.
In addition, in the field of power batteries, Changan New Energy has also brought the first - micro-core high-frequency pulse heating technology.
Specifically, this technology uses the characteristics of lithium-ion batteries at low temperatures, high frequency positive and negative switching large currents do not occur lithium evolution, do not affect battery safety and life, through the electric drive IGBT extremely fast opening, generating a large current of rapid positive and negative switching, and then with the help of the characteristics of large internal resistance in the battery at low temperatures, the battery is quickly and uniformly self-heating. It is reported that after the application of high-frequency pulse heating technology, it can achieve extreme heating at ultra-low temperature, in the environment of -30 °C, the battery heating speed can reach 4 °C / min, low temperature dynamics increased by more than 50%, low temperature charging performance can be shortened by more than 15%.
In addition, based on the EPA1 platform, Changan New Energy will also take the lead in mass production of autonomous car range extender system and autonomous car hydrogen fuel cell system.
In fact, the first model to come down from the EPA1 platform platform, the C385, will bring pure electricity, extended range and hydrogen fuel three power versions. According to the information released by Changan New Energy, under CLTC working conditions, the comprehensive working range of the C385 pure electric version can reach more than 700 kilometers; The comprehensive working mileage of the extended range version in the full oil and full power state can reach more than 1200 kilometers; The cruising range under the comprehensive working conditions of the hydrogen-electric version can also reach more than 700 kilometers, and it can also achieve 3 minutes of ultra-fast energy replenishment.
Based on this, Changan Deep Blue's first car, the C385, is also a collection of forward-looking technologies in one. It is reported that the new car will launch three power models of pure electric version, extended range version and hydrogen fuel cell version, equipped with many industry-leading technology and intelligent technology configurations.
Behind the three dynamics, it represents the deep layout of Changan Deep Blue in the field of three major technical routes. It is understood that in terms of pure electric, Chang'an's new generation of super collector electric drive innovatively adopts the five core technologies of eight-layer flat wire winding, rotor double V topology configuration, ultra-low resistance wire, adaptive control algorithm, and low resistance topology optimization, which increase the efficiency of the electric drive system by 0.9, 0.4, 0.1, 1.2 and 1.3 percentage points, respectively, so that the electric drive as a whole can achieve the maximum efficiency of more than 95% of the system.
In the field of range extender, through the collaborative design and control of the power system based on extreme efficiency, the intelligent energy management control based on real-time road conditions, and the high compression ratio depth Atkinson cycle and other technological innovations, Changan Deep Blue finally developed an ultra-high power generation efficiency fuel range extender system, 1L oil can generate about 3.3 degrees of power.
At the same time, due to the intelligent power balance control strategy and the active vibration suppression of the extended range system, the extended range system can realize the sensorless operation of the whole domain.
In the field of hydrogen fuel cell vehicles, Changan Deep Blue has created an independent car hydrogen fuel cell system. The system adopts a water-gas side stack design, which achieves a smaller volume and greater power, thus realizing the loading of the car. At the same time, the system also adopts the working condition mode intelligent perception algorithm and a new generation of highly active platinum alloy catalyst gradient coating, which can achieve ultra-high power generation efficiency and ultra-long stack life.
It is reported that Changan Deep Blue's autonomous car hydrogen fuel cell system can achieve 1kg of hydrogen power generation of 20.5 degrees, and achieve 3 minutes of ultra-fast energy replenishment.
Based on the above technology, Changan Deep Blue's first model, the C385, can have both a pure electric version, an extended range version and a hydrogen fuel cell version. It is reported that the reason why Changan Deep Blue wants to launch three models with different technical routes is mainly to meet the different needs of consumers more comprehensively and systematically, and accelerate the penetration and promotion of new energy vehicles.