Poor battery life of electric vehicles at low temperatures... And other topics have been repeatedly pushed to the public. In fact, this is not only a problem with electric vehicles, but all electrical appliances that use lithium batteries may have problems when encountering low temperatures, just like when Xiaobian shoots a car, the camera suddenly cannot turn on.
but...... WM Automobile is still in the -30 °C extremely cold environment, the M7 vehicle calibration and verification work, the M7 air conditioning, battery thermal management, low temperature charging, dynamics and other core items for rigorous testing, the results to achieve -30 °C environment, air conditioning within 17 minutes to rise to comfortable temperature, 17kWh 100 km energy consumption, SOC from 30% to 80% only 30 minutes of eye-catching results.
Bring your own "warm baby"
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.
To achieve this result, thanks to the M7 battery thermal management system using a strong scalability of the distributed architecture, it uses "thermal management system active heating", "discharge process battery self-heating" two ways to make the battery always in a comfortable working area, can ensure normal charging and discharging performance, effectively solve the consumer in the winter car life sharply reduced troubles.
Moreover, the M7 battery thermal management system also adopts a high-precision SOC algorithm strategy, which can control the error within 5%, make the meter mileage more accurate, and reduce the psychological anxiety of consumers. 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 consumers 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.
In addition, the M7 is also equipped with a high-performance integrated motor with a power density of 2.388kW/kg "small and fine", and its electric drive assembly efficiency is more than 96%, which makes the ultimate use of battery energy and can meet the needs of harsh environments.
Based on the third generation of Living Motion power domain control, M7 also sets up five driving modes of champion, comfort, energy saving, snow and adaptive, which can meet the different driving preferences of consumers. Among them, the snow mode can realize the joint commissioning of various components, effectively coping with common winter car scenes such as ice starting and snow climbing.
Heating does not have to wait
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 also changed.
For example, M7's intelligent dual-zone automatic air conditioning system has experienced debugging in different seasons and different altitude environments, 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. Even in extremely hot and cold environments, it can reach a comfortable temperature in 17 minutes.
Like the "frequency conversion" function of home air conditioners, the M7 thermal management system will also accurately control the air conditioning power based on the system status such as ambient temperature, battery cell temperature and the user's personalized settings. In addition, consumers can also remotely control air conditioning, intelligent defrosting, remote ventilation, battery temperature control appointments and other functions through the mobile APP.
Moreover, through the optimization of algorithm and calibration matching, M7 realizes the efficient collaboration of various executive components such as cold and warm dampers and medium temperature, and different working modes adapted to different seasons and different environments. 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 air conditioners accounts for less than 10%.
The M7 also adopts a smart breathing grille design, in the colder environment and high-speed driving, the grille will automatically open and close to meet temperature and aerodynamic requirements, so that the driving experience and endurance performance to further improve.
No discount on incoming calls
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 of WM engineers.
For core components such as batteries, M7 has carried out 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 been strictly tested. After "freezing", the M7 vehicle starts cold and normally, and the thermal management system can work normally.
After this experience, Xiaobian found that pure electric vehicles, which used to have a large reduction in mileage in the past to winter, are now more and more mature in technology, such as in the -30 °C environment where digital cameras will fail, the various functions of WM M7 can still be used normally, and the mileage is also guaranteed. Through the explanation of the on-site staff, Xiaobian learned that WM M7 will undergo multiple rounds of rigorous testing before it is officially listed, and I believe that these efforts can ensure that future products have more reliable quality after they are listed.
Come all come, don't you like it?