The results of the "AutoLab 2021 Winter Endurance Test" have been announced one after another, and finally a small test result is given to you - the pure electric vehicle night parking power loss test.
Why do you want to carry out pure electric vehicle winter endurance test? It is because the temperature is low in winter, the battery activity decreases, and the diffusion capacity of lithium ions in the electrolyte decreases, so that the current value decreases, the total usable capacity of the battery becomes smaller, and the mileage is significantly reduced.
Why do you want to do a pure electric vehicle night parking power failure test? It is because when the pure electric vehicle is standing, because the BMS battery management system or similar sentry mode and other systems are still in a working state, the power will still produce losses, and the temperature is often low at night in winter, and the low temperature also reduces the battery activity and reduces the endurance of the whole vehicle.
So how much will the mileage of a pure electric vehicle shrink after parking for one night? Take a look at the image below.
There were a total of 11 pure electric vehicles in this test, and we tested them in Hefei on the second day of the winter solstice.
At about 20 o'clock the night before, we charged the vehicle to a fully charged or nearly full jump gun state at the DC charging station, and then briefly moved to the next public parking lot (about 50 meters), recording the SOC level and mileage of each vehicle at this time, the temperature at 23:00 was about 4 °C, and the night temperature was close to 0 °C.
After about 12 hours of parking, the next morning we also recorded the SOC level and mileage of each vehicle, and the temperature at 08:00 in the morning was around 10°C.
As shown in the figure above, among the 11 test vehicles, the most obvious decline in vehicle SOC and mileage is the zero-run C11, which shows a full loss of 11km after a night of parking.
However, the best of the aiways U5 Pro gave me an unexpected surprise, this car after about 12 hours of sitting in one night, the endurance of the table did not decrease but increased, and even increased by 1km...
▲Aiways U5 Pro table display battery life changes
When parking at night that night, this one is equipped with a 63-degree electric battery pack, the official endurance of 503km Aiways U5 Pro meter display endurance 497km, SOC remaining 99%, when the next day we recorded, SOC is still 99%, and the table display endurance came to a 498km, considering that the day before the test, Aiways U5 Pro in the last power output is limited, is the only vehicle that has driven more than 30km by 1% SOC, this slightly strange setting, Makes me wonder if the engineer is also here today to make a joke for me.
Of course, I am more inclined to understand that the battery management system of the AIWAYS U5 Pro actively heats the battery pack to a more suitable temperature when the temperature is low at night, so that when we record in the morning, because the activity of the battery pack is better than when recording at night, so that although the power is consumed, the new mileage measurement results give a slightly better number than last night, which I think I can understand.
Looking at the test results of a total of 11 cars, it can be seen that in the slightly better environment of 0-10 ° C, after parking at night for one night, the power loss of pure electric vehicles is not very obvious, although the maximum loss of mileage dropped by 11km, but soc also dropped by only 2%, most models the mileage dropped by less than 5km, through the intervention of the battery management system, although soc slightly declined, but the final table endurance still maintains 0km floating models also exist.
However, this is only the night power failure test in Hefei in winter, if it is in the area north of the Yellow River where the temperature is lower at night, the situation must not be so optimistic, is your situation there different from our actual test results? Feel free to leave a message in the comment area.