It also introduced Roewe pure electric R standard, the first flagship car ER6 and the upcoming Roewe Marvel Comics? R can be regarded as an "insider" in terms of technical safety, reliability and durability.
As the most important "three big pieces" of an electric vehicle, the technical level of battery, motor and electronic control is related to the overall technical strength of an electric vehicle. Over the years, SAIC has always taken the development of Sanpower technology as the top priority, invested a lot of R&D expenses, and solved a series of technical problems in the field of Sanpower.
From roewe r? ER6, Marvel Comics? R began to carry SAIC's "E 1 generation" three-electric technology, and we can see their progress and achievements ("E0" refers to the technology used by SAIC pure electric vehicles before; "E 1" comes from roewe r? ER6, Marvel Comics? R new technologies that have been used; "E2" is the next generation technology that will be put into production from 2022).
Battery-safety is the premise and strong performance.
In terms of batteries, the "E 1 generation" battery pack has made great progress in fast charging performance and thermal runaway management. According to the regulations of the Ministry of Industry and Information Technology, GB will be implemented from 1 next year. 3803 1-2020 "Safety Requirements for Power Batteries for Electric Vehicles", the national standard requires that the battery system will not catch fire within 5 minutes after the heating of the battery monomer is out of control.
And roewe r? ER6, Marvel Comics? The "e 1 generation" battery pack carried by R is designed according to the battery safety standard of UL-2580 in the United States. The standard requires that the battery system should not catch fire within 30 minutes after the battery heating is out of control, which is equivalent to 6 times of the national standard, which shows its high safety.
According to Zhu Jun, in order to meet this standard, the technical team has burned 50 or 60 sets of battery packs in the related tests of thermal runaway management. Through continuous improvement, the thermal runaway time can be controlled at about 40 minutes.
This process has experienced a very difficult exploration, but also sacrificed a small part of energy density and increased the cost of the battery. Various technical measures have been taken to stop plugging, prevent plugging, drain and prevent plugging of explosion-proof valves and aerogels, but the target requirements have finally been achieved.
While ensuring safety, the energy density of the battery system and the cruising range of the whole vehicle have also been improved. Specific to roewe r? On the ER6 model, according to Zhu Jun, the energy density of ER6' s R&D team using 523 battery has reached 1.80 WHR/kg, which is quite high and is in the first-class echelon of the industry.
Besides,? ER6' s test team has done the endurance test in Beijing, Shanghai, Chongqing and other cities, and the maximum endurance has reached 650-660 kilometers. It is worth mentioning that the data recognized by ER6 in bench test and national certification center are higher than the announcement data. In order to consider the consistency and the driving differences and feelings of consumers, the 620-kilometer battery life was promoted.
Of course, this endurance performance also benefits from the progress of vehicle aerodynamics, and it can design a shape with both appearance and ultra-low drag coefficient of 0.24Cd. Overall, the endurance performance is still relatively "real". Of course, in the future, we will introduce more stringent EVRI endurance measurement content, so you can look forward to it.
In addition, the "E 1 generation" battery pack has achieved a unified size specification, and the battery pack with the same size can achieve three battery capacities of 53, 63 and 72 kWh, meeting the endurance needs of different vehicles and different people. At the same time, this technical reserve also lays a certain foundation for increasing the power exchange mode in the future.
The coaxial layout of the motor skillfully improves many performances.
SAIC has made great innovation achievements in motor technology. Roewe r? The "e 1 generation" drive motor carried by ER6 skillfully optimizes the problem of heavy weight and large volume of the previous generation "E0" motor through "coaxial layout configuration", and further improves the motor efficiency.
By making the output shaft of the motor hollow, nesting a bearing on the surface of the hollow shaft, and then putting a thin shaft in this bearing, the outer hollow shaft and the inner solid shaft rotate in a relationship of about 10 without interfering with each other, thus making full use of the space around the semi-shaft, realizing the compactness of the motor layout, further improving the space utilization rate and improving the efficiency of the electric drive system.
In addition, the improvement of motor efficiency is largely due to the design of 8-layer hairpin winding, which is more advanced than the motor equipped on Volkswagen MEB platform. At present, the driving motors on the market generally adopt double-layer hairpin flat wire windings, which are arranged into two groups of four layers from top to bottom. This technology has the disadvantages of obvious heating and low efficiency when the motor speed is too high.
And roewe r? ER6 drive motor adopts 8-layer hairpin winding design. Compared with the former, the range of motor efficiency ≥90% is increased from 83% to 88%, which expands the range of efficient motor operation. Under the same conditions, the manufacturer's test results show that the average power consumption of NEDC decreases from 13.8kWh/ 100km to 12.2kWh/ 100km, which is more than1.5%.
Electronic control-at all costs, move towards the goal of ASPICE-3.
The final power of Sandian is electronic control, which is the most important aspect of Jieneng (SAIC R&D Center-Shanghai Jieneng Automobile Technology Co., Ltd.). Half of its human resource cost is used in the field of electronic control, and ASPICE-2 level has already been realized. Cars? Software? Process? Improve? And then what? Ability? Determination? ASPICE-3 is expected to be realized this year, which will be the level of aviation-grade software with very strong reliability.
In addition, SAIC's current "E 1 generation" technology can realize local FOTA, and "E2 generation" technology will fully realize fast and reliable FOTA, and it is expected to be equipped with 5G technology, and the user experience will be very good, which is worth looking forward to.
Other content, sneak peek!
There will be three models of 1 and the next generation of "E2" motors with power of 150, 180 and 250kW respectively. Among them, the 250kW motor weighs 85kg and the output torque reaches 450 Nm. Compared with Roewe Marvel Comics now? X's power system (three motors, total weight 200 kg, output power 222 kW) has made great progress in technology. Although this technology is still in the research and development stage, according to the current plan, it can be mass-produced in 2022 (all the "E2" generation three electricity technologies will be mass-produced in 2022).
2. Considering the efficiency of the motor and the domestic electricity consumption environment, the "E2" generation motor still uses IGBT function module, and the silicon carbide function module is not considered for the time being. .
3. The "E2" battery will surpass the "E 1" battery in energy density, safety and other aspects, including protection level, and will also work towards the goal of IP69.
4. The cost of "E2" battery pack is expected to reach about 75% now, which will mean that the most expensive battery system of electric vehicle is cheaper, and the cost of the whole vehicle is lower under the same circumstances.
5.SAIC Roewe's battery pack will develop towards the goal of "unified size".
6. The related technologies of "E2" generation will come out together with the new platform developed by SAIC, which is expected to be realized in 2022.
Bangping branch
It is understood that SAIC's latest three-electricity-related technological achievements will be applied to Roewe R for the first time. ER6, the subsequent Roewe R? Marvel Comics? New models such as R will also be equipped with the latest technology. At the same time, the next generation technology is also under development, and it is expected to meet you in 2022. Roewe r? As the "first shot" of SAIC Roewe's double-standard strategy, ER6 is self-evident, which is related to the word-of-mouth accumulation of the whole Roewe R brand and the "first impression" of consumers on the new brand. At present, the application of new generation technology has made remarkable progress in the endurance, safety and reliability of new cars. Of course, whether its products can reach the strength of official propaganda remains to be verified by the market. We will also introduce more stringent measurement contents in the future, such as EVRI, so stay tuned!
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.