Recently, the full-scene intelligent mobile space - WM M7 opened the vehicle calibration and verification work in extremely cold weather, in the -30 °C extreme cold environment, the air conditioning, battery thermal management, low temperature charging, dynamics and other core projects for rigorous testing, to achieve -30 °C environment air conditioning rose to comfortable temperature within 17 minutes, energy consumption of 17kWh / 100km, SOC from 30% to 80% only 30 minutes of results.
In the cold environment, the cell performance declines, the battery output becomes weaker, resulting in the vehicle power can not keep up, a reliable performance of the motor is particularly important for electric vehicles, and the battery thermal management system assumes this role. WM M7 battery thermal management system adopts a distributed architecture with strong scalability, which adopts two ways: "active heating of thermal management system" and "self-heating of the battery during discharge" to keep the battery in a comfortable working area and ensure normal charging and discharging performance. WM7 battery thermal management system adopts high-precision SOC algorithm strategy, which can control the error within 5%, at the same time, WM M7 battery thermal management system can also carry out more intelligent energy consumption coordination management of motors, air conditioners and other accessories, when users need high-power driving, they can fully give battery energy to the motor for output, and battery energy allocation is more intelligent.
The WM M7 is equipped with a high-efficiency integrated motor with an electric drive assembly efficiency of more than 96%, making the ultimate use of battery energy. It is worth mentioning that the mass power density of M7 high-performance motors reaches 2.388Kw/kg, which is at the leading level in the industry. 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, WM M7 sets up five driving modes of champion, comfort, energy saving, snow and adaptive, and the driving sense is finer and the driving sense is finer, meeting more segmented driving preferences. Comfort mode can provide a fuel vehicle-like driving experience.
WM M7 is equipped with intelligent dual-zone automatic air conditioner, integrated PM2.5 monitoring, negative ion air purifier, fragrance and other functions. Not only that, the system of WM M7 air conditioner has also experienced the debugging work of different seasons of "spring, summer, autumn and winter", the plains and plateaus at different altitudes, and has made special efforts 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.
Just like the "frequency conversion" function of home air conditioners, WM7 thermal management system will also accurately control the temperature of the air conditioning power based on the ambient temperature, the state of the battery temperature temperature system and the user's personalized settings, and the user can also remotely control the air conditioning, intelligent defrosting, remote ventilation, battery temperature control appointment and other functions through the mobile phone APP.
Through the optimization of algorithm and calibration matching, WM M7 realizes the efficient collaboration of various executive parts 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%.
For core components such as batteries, WM M7 has conducted a number of "freezing" tests for 12 hours in a -30 °C environment, and its 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 takes only 30 minutes to charge from 30%-80%.
There is only one test standard for the power system: 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.