On April 21, the Changan Deep Blue Technology In-depth Interpretation Exchange Meeting was held, at which the first model of Changan Deep Blue, the C385, was officially met with consumers. At this exchange meeting, Changan Deep Blue also released a new EPA1 electric platform.
Changan deep blue EPA1 pure electric platform from 2017 began to develop, to this year has lasted 5 years, the platform can bring users high efficiency, high performance, high intelligence, high safety of new models, EPA1 platform support pure electric, extended range power, hydrogen energy pure electric three technical routes of the model, and EPA1 is also a rear-drive model-based platform, but the text is very interesting, the exchange meeting also mentioned the word compatibility, want to come to the short term is impossible to see the real car. For users in the short term, the EPA1 platform is actually a pure electric platform for users.
High efficiency
The highlights of the EPA1 platform include high efficiency, in the exchange meeting site Changan Deep Blue put forward a new concept, called power system electrical efficiency, its calculation method is to use the vehicle's electric drive system net output of the useful work divided by the power consumption of the power grid, simply put, is to divide the force emitted by the actual model by the charging meter used up, because the model will have losses in charging, driving, the higher the value, the lower the vehicle's charging loss, the lower the loss when the vehicle is converted into the power battery, The higher the braking energy recovery efficiency of the vehicle, which is about the meaning.
The second embodiment of high efficiency is the Changan new super collector electric drive that Changan Deep Blue will use, that is, the electric drive system that will be installed on its C385 in the future, using eight-layer flat wire winding technology, rotor double V topology configuration, ultra-low resistance wire, adaptive control algorithm, low resistance topology optimization and other technologies to improve the efficiency of the electric drive system, the maximum efficiency of the electric drive system can reach 95%, simply put, if the total input is 1 amount of electricity, then 95% of it can be used to drive the vehicle.
The third highlight of high efficiency is the micro-core high-frequency pulse heating technology, the highlight technology is not listed, the result is the model that adopts the technology, the battery can heat up by 4 °C per minute at -30 °C, the power is increased by 50% at -30 °C, and the charging time is shortened by 15% at -30 °C. In fact, the efficiency of electric vehicles in the low temperature state decline is known to everyone, then if the battery pack can heat up rapidly at low temperature, the indicators of natural power performance and charging time will be improved. Pulse self-heating technology is currently USED BYD's blade battery pack is also in use, Changan's EPA1 platform practice is to use random frequency conversion IGBT open and close control, if we compare the battery pack discharge to the left, the battery pack stop discharge is compared to the right, then the technology is the random state of the left and right jump, through such an operation to make the battery pack state repeatedly switch, to achieve the purpose of self-heating.
In addition, Changan Automobile in the introduction of the EPA1 platform high efficiency characteristics will also be the platform compatible range power system to make a certain introduction, the range extender power is not unfamiliar to everyone, the ideal ONE is a more successful example, the simple understanding of the range extender power is that the engine burns oil to charge the battery pack and drives the power through the drive motor to drive the vehicle, the engine is only power generation does not participate in the drive, because there is no engine power generation, so there is no "endurance anxiety", Commuter mobility is to replenish the power battery power through the charging pile to achieve the purpose of saving fuel costs. In my personal opinion, the extender power in the process of energy conversion will inevitably be wasted, fuel energy into electricity conversion efficiency and then the process of converting electricity through the drive motor into traction has undergone two conversions, Changan Automobile claims that 1L gasoline can be converted into 3.3kWh of electricity, but it is not stated whether it can ultimately be used to drive 3.3kWh or the engine converts 3.3kWh of electricity, for this reason I am personally not optimistic about the extender power.
For the EPA1 platform compatible hydrogen power battery technology, also mentioned in this exchange meeting, the use of water and gas side stack design, working mode intelligent perception algorithm, high activity platinum alloy catalyst gradient coating and other technologies, Changan officially gave 2 sets of data, 1kg of hydrogen can generate about 20.5kWh of electricity, and the vehicle can quickly replenish hydrogen within 3 minutes. From the user's point of view, how to convert EPA1 hydrogen energy models, how much energy consumption costs for daily use, how to ensure the safety of hydrogen energy of vehicles, the most important thing is whether the supporting hydrogen refueling station system is mature or not, the current domestic hydrogen refueling station is relatively small, so the practicality of hydrogen energy is not as good as pure electric, in the short term, it is estimated that we can not see the hydrogen energy model of the EPA1 platform.
Performance
The embodiment of the high performance of the EPA1 platform is that the vehicle can support the two-motor four-wheel drive expansion, the standard model is mainly the rear drive, the use of all-in-one electric drive assembly, if there is a power demand for high-performance models in the future, the first three-in-one electric drive assembly can be used to match the electric four-wheel drive assembly of the front and rear dual motors to form the electric four-drive force of the front and rear dual motors, and the module that introduces the performance also emphasizes the high compatibility of hydrogen fuel cells and extended range dual power.
The high performance also includes the H-arm multi-link independent suspension system and the new brake dual redundancy system adopted by the EPA1 platform, and the H-arm multi-link independent suspension does not have much key information disclosure. The brake double redundancy system is that the vehicle has two sets of braking systems, and the two systems provide different braking feelings, so the brake double redundancy system can not only be used as a backup braking system for the vehicle, but also a functional system for users to change the driving experience of the vehicle.
Another manifestation of high performance is the axle-to-load ratio of 50:50 before and after. This is advantageous for future model designs, and is also the basic guarantee of the sporty tonality of future EPA1 platform vehicles, but the sporty attributes not only include the axle-to-load ratio, but there are many things to consider. For example, tuning for motivation.
Changan official emphasized the conflict between the power response in the power tuning of the electric vehicle type and the NVH aspect of the vehicle, simply put, the gear inside the motor, no matter what the production accuracy, there is always a gap between the two components, then these gaps are accelerated in the electric vehicle, especially the electric vehicle power as long as the acceleration is the peak torque, which will produce some more obvious noise. If the power responsiveness of electric vehicles is reduced, the power performance of electric vehicles is bound to have an impact, which is the collision between silence and power response. Models of the EPA1 platform have improved to some extent in response to this problem.
High intelligence
The first embodiment of high intelligence is the global speed OTA (Over the air), the EPA1 platform can support the OTA upgrade function of all nodes in the vehicle, and thanks to the optimization of hardware and algorithms, the upgrade time of all nodes is less than or equal to 3 minutes. Another important point is that compared to many models that support OTA functions at this stage, many basic functions of the vehicle cannot be used when they are still upgraded (because many function controls are integrated in the multimedia screen), the model system of the EPA1 platform implements A/B partitioning, just like the computer cd disk, to ensure that in the process of upgrading, the basic function control of the vehicle is still there, and the user is not delayed.
The vehicle domain controller of the EPA1 platform adopts the self-developed Changan smart core, and the current automobile market is affected by factors such as the epidemic, upstream price increases, lack of cores, etc. The price and arrival time performance are not good, and Changan has developed the vehicle domain controller by itself, which is beneficial to its models. In addition, the in-car intelligent cockpit domain controller, the EPA1 platform is currently equipped with Qualcomm Snapdragon's 8155 vehicle specification-level chip, and can work with other processors in the car to enhance the experience of the vehicle's intelligent cockpit.
Intelligent driving is the strength of new energy models, EPA1 platform models are using multi-core intelligent driving domain controller, the whole car 27 intelligent driving assistance sensors, and many of the on-board systems have redundant systems, can be understood as backup systems, intelligent driving assistance state is relatively safer, I personally think this is on time a brand, but there is no evidence. As for the realization of L4 level intelligent driving assistance, we can take a look at it, in the L3 level driving assistance function has not yet been perfected (intelligent driving assistance, the improvement of corresponding laws and regulations), it is still too early to talk about L4 level driving assistance. The embodiment of L4 is also the function of valet parking, and the current practicality of these functions is also doubtful, so there is not much to say.
High security
The characteristics of the safety level are not explained one by one, a simple list of everyone to see, five horizontal and nine vertical ring body, 45% high-strength steel proportion, all-round battery safety protection, 5+1 information security and privacy protection, battery pack digital pre-control management, battery pack digital temperature control management, etc. Strengthen the impact of vehicles, user information security, battery pack safety and other aspects. After the high safety is said, the final introduction of the C385, the first model of the Deep Blue brand, was introduced.
Navy C385 is a sword Tesla Model 3 model, is expected to be officially launched in the second quarter of 2022, from the vehicle's three-dimensional dimensions can be seen, C385's three-dimensional dimensions are 4820x1890x1480mm, while Tesla Model 3's three-dimensional size is 4694x1850x1443mm, Navy C385 is slightly larger than the Model 3 in terms of vehicle length, width and height, C385's wheelbase is 2900mm, The Tesla Model 3 has a wheelbase of 2875mm, and the C385 has a slight advantage in wheelbase.
The C385 also announced the range and energy consumption levels of the three versions of the model. Among them, the pure electric vehicle model in the CLTC working conditions, the C385 long-endurance version of the comprehensive working range of more than 700km, the high-performance version of the model maximum power of up to 190kW, the vehicle comprehensive working condition power consumption as low as 12.3kWh/100km or less; the extended range in the CLTC comprehensive working conditions of the cruising range of more than 1200km, pure electricity comprehensive working conditions of the cruising range of more than 200km, feed fuel consumption as low as 4.5L/100km or less The cruising range under the CLTC working conditions standard of the hydrogen version can reach more than 700km, and the feed hydrogen consumption is as low as 0.65kg/100km or less, which can achieve rapid hydrogen replenishment in 3 minutes.
In addition to the power of the description, C385 will also use electric hatchback doors, 19-inch wheels, frameless doors, hidden door handles and other configurations, in the car intelligent configuration will be equipped with a 14.6-inch sunflower screen, as for what the sunflower function, the main thing is to rotate.
In terms of appearance, in fact, the deep blue C385 is very similar to the Model 3, C385 also has some of its UNI series models of design, the C385 is more muscular than Tesla, and the three circumference and wheelbase of the vehicle are slightly superior. And also uses a rear-drive setting, the vehicle's sporty tone is really good.
The interior design also has many similar elements to tesla Model 3, such as a 14.6-inch sunflower screen and a simple center console design. The difference is that the C385 has more of an all-in-car LCD dashboard than the Tesla Model 3, something that's not available on the Model 3.
Why is it that the C385 road is long and difficult to succeed, first of all, because the current new energy vehicle market competition is becoming increasingly fierce, and all brands have seen the high-speed and normal momentum of new energy brands, and have also begun to lay out new energy products. Changan Deep Blue is not a group of brands that move very quickly, and in addition to Tesla, there is also a DOMESTIC BYD, and the SEAL model released by BYD some time ago is also a sniper Tesla Model 3 model.
It can be seen that the exterior design of the seal is also very similar to C385, when the similarity of the exterior interior design is high, when the user cannot choose through the comparison of design and configuration, it will generally choose a brand with relatively good ownership and reputation performance. Many users think that this will be more secure, compared with seals, the deep blue brand and C385 are "newcomers", neither ownership nor technical reputation, once users consider these factors, then the probability of choosing C385 is unknown.
Secondly, the price problem, BYD is relatively strong in the new energy model market, one of the most important reasons is that BYD's new energy models can do full-stack self-development, that is, the parts used in the vehicle can be developed and produced by themselves, which brings cost optimization that other brands cannot compare, which is also BYD's courage to declare that users can use the price of fuel vehicles to drive hybrid models, and Changan Deep Blue does not have this ability, so how to compete with brands such as BYD in terms of price is a problem. And want to snipe Tesla, the price is definitely cheaper than others, if the price is similar, why don't users buy a relatively more value-preserving product?
There is also a point that there are still many users of the Current Changan New Energy brand model that have not been put on the car, Changan New Energy is currently on sale in the Ben Ben E-Star model there are still a large batch of no delivery, many booking users even directly in the official news below the message "urge car", if the future delivery situation can not be alleviated, then the user's confidence in Other new energy products of the Changan system is bound to be affected by some. If the price is not very attractive, the prospects of the Changan Deep Blue C385 are worrying.
In any case, it is still hoped that there will be more models like Changan Deep Blue C385 and BYD Seals, and for consumers, the highly competitive automotive market means more optional products, more talkative vehicle discounts, and better cost-effective products. I hope that the Changan Deep Blue C385 can succeed.
I am Teacher Mu, and I hope that you will buy a car and take fewer detours.