Lead
Not long ago,
WM Motor launched its first all-scenario intelligent pure electric car - WM M7.
Recently, WM M7 opened a new round of vehicle calibration and verification work in extremely cold weather, and carried out rigorous tests on core projects such as air conditioning, battery thermal management, low temperature charging, and power in an extremely cold environment of -30 °C. The test results shown by the M7 in the extremely cold environment of -30 degrees Celsius this time once again reflect the strong strength in core areas such as Sandian.
Topics such as poor battery life and slow charging of electric vehicles in winter have been repeatedly pushed to the public. The M7 is equipped with a low-attenuation and long-lasting power battery with a proven thermal management system. In the extremely cold environment of -30 °C, the energy consumption of the M7 test is only 17kWh/100km, which effectively solves the problem of users in alpine areas with a sharp reduction in winter car life.
In the cold environment, the performance of the battery cell declines, the battery output becomes weaker, which will lead to the vehicle "can not be strong", a reliable performance of the "warm baby" is particularly important for electric vehicles, the battery thermal management system to assume this role. M7 battery thermal management system adopts a strongly scalable distributed architecture, which adopts two ways: "active heating of thermal management system" and "self-heating of the battery during discharge" so that the battery is always in a comfortable working area to ensure normal charging and discharging performance. M7 battery thermal management system adopts high-precision SOC algorithm strategy, which can control the error within 5%, show the mileage more accurately, reduce the user's psychological anxiety, and give more sense of security. At the same time, the M7 battery thermal management system can also carry out more intelligent energy consumption coordination management of motors, air conditioners and other accessories, and when users need to drive with high power, they can fully give battery energy to the motor for output, and the battery energy allocation is more intelligent.
At the same time, the M7 is equipped with a "small and fine" high-performance integrated motor, and its electric drive assembly efficiency is more than 96%. It is worth mentioning that the mass power density of the M7 high-efficiency motor reaches 2.388Kw/kg. The motor also meets the needs of use in harsh environments and is designed for a service life of up to 15 years. Based on the third generation of Living Motion power domain control, M7 sets up five driving modes of champion, comfort, energy saving, snow, and adaptive, and the driving sense is finer and finer, meeting more subdivided driving preferences. Comfort mode can provide a fuel vehicle-like driving experience, allowing the fuel truck driver to switch freely. The snow mode is to realize the joint commissioning of various components, effectively coping with common winter car scenes such as ice starting and snow climbing.
Earlier, for electric vehicle users, the realization of "air conditioning freedom" in winter was extremely luxurious. This is not only because of the problem of the heating speed of the air conditioner, but also because the high energy consumption of the air conditioner has led to a significant reduction in the mileage. With the continuous change of air conditioning technology, this phenomenon has changed a lot.
The M7 is equipped with intelligent dual-zone automatic air conditioning, integrated PM2.5 monitoring, negative ion air purifier, fragrance and other functions, creating a comfortable and healthy riding space for users. The M7 air conditioning system has also undergone commissioning work in different seasons of "spring, summer, autumn and winter", in different altitude environments of plains and plateaus, and has been specially optimized for extremely hot and cold weather. When the air conditioner is activated in the normal season and environment such as spring and autumn, the temperature in the car can be maintained in the comfortable temperature range of about 22 ° C for the head and about 33 ° C for the feet in 5 minutes. Especially in extremely hot and cold environments, this comfortable temperature can be reached in 17 minutes, and the air conditioning performance is outstanding.
Just like the "frequency conversion" function of home air conditioners, the M7 thermal management system will also accurately control the temperature of the air conditioner power based on the system status such as ambient temperature, battery cell temperature and the user's personalized settings, whether it is a hot summer or a cold, it can bring a comfortable temperature experience. Users can also remotely control air conditioning, intelligent defrosting, remote ventilation, battery temperature control appointment and other functions through the mobile app.
Through the optimization of algorithm and calibration matching, M7 realizes the efficient cooperation of various executive components such as cold and warm dampers and medium temperature, and different working modes adapted to different seasons and different environments. In winter, the M7 achieves a great improvement in heating energy efficiency by increasing the opening of the cooling and heating dampers and reducing the temperature of the medium. The data shows that in the conventional environment, the energy consumption of M7 air conditioners accounts for only 3%, and in extremely hot and cold environments, the energy consumption of M7 air conditioners accounts for less than 10%.
In addition, the M7 features a smart breathing grille design that automatically opens and closes to meet temperature and aerodynamic requirements in colder environments and at high speeds.
The environment of minus tens of degrees is a very extreme use environment for both smart electric vehicles and fuel vehicles. How to ensure that the M7 works normally in this environment - charging "no discount" and power "not pulling down" is another core issue. M7 has gone through three famous winter calibration test sites (chambers), spanning the ambient temperature from 5 °C to -40 °C, and fully matching the user's various harsh use scenarios with more than 150 calibration and test items.
For core components such as batteries, M7 has conducted a number of "freezing" tests for 12 hours in a -30 °C environment, and the thermal management ability, battery pack thermal insulation performance, endurance and charging and discharging ability at low temperatures have undergone the most stringent tests. After "freezing", the M7 vehicle starts cold and normally, and the thermal management system can work normally and efficiently. At the same time, the SOC from 30%-80% charging time only takes 30 minutes, truly achieving zero anxiety in winter charging.
There is only one test standard for the power system, and it is also the most stringent one: the electric drive assembly of the M7 should be consistent with the performance of the normal temperature environment, and the performance is not discounted. The power and torque output are normal, and the torque response time is less than 80ms. It can also cope with the needs of rapid acceleration and climbing.