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[YesAuto Electric Vehicle] Friends who drive pure electric vehicles around often have a kind of anxiety: worry that their car will experience battery capacity decline; they don’t know whether it is psychological or real. They always say, “Hey, my car The mileage of running with a full battery is less, and it’s over. Don't worry, I specially found a “magic weapon” today. Use its charging pile to charge, and you can get the status information of your vehicle from the App. Is there any problem with the power battery? Where did the fault occur during charging? It's clear at a glance.

At present, there are various types of charging piles in various parking lots. The information that most charging piles can present to car owners is nothing more than charging current, voltage, temperature, SOC and other information. Users can clearly know how much their car is charging and how much electricity is charged. , Nothing more. But the special caller App has a “vehicle safety profile” function. I don't know how many people have discovered it. It can display vehicle charging status, power battery balance, fault distribution and other information, allowing you to understand the health of the vehicle more clearly.

In order to actually experience the function of “Vehicle Safety File”, we used the work car to charge the special call fast charging pile and slow charging pile. By the way, I would like to share with you the experience of using the special call charging pile for your reference. First of all, in terms of the coverage of charging stations, taking Beijing as an example, there are not few public charging piles for special calls, but there is still a gap if compared with the national grid.

The charging pile of the special call looks far from the “high-end atmosphere” of the fast charging pile of the State Grid, and the charging pile body is not equipped with a display screen. Fortunately, the content that can be displayed by the special caller App is very rich. In addition to basic information such as charging power, SOC, and temperature, the most interesting function of the App should be the “vehicle safety profile”.

There are as many as 17 data and charts in the vehicle safety file. For many users, this does seem to be a headache. Fortunately, a special call has made an explanation for everyone, including how to read the chart and what the meaning of the data in the chart is. Of course, this is the data based on the number of user charging orders, so in theory, the more orders, the more accurate the data evaluation; we only charge 4 times for the experience, so we will provide it with the special call app. Example to share with you.

Let’s take a look at a specific example. Many pure electric vehicle users know that slow charging is more conducive to prolonging the life of the vehicle’s power battery than fast charging. Special calls will record the number of slow charging of the vehicle in the App to remind users that occasionally To use slow charging to charge the vehicle. In addition, if the charging stops due to a sudden failure during charging, only the error code is often displayed on the display of the charging station, but the fault distribution diagram on the special call App can visually display the cause and proportion of the failure.

Potential users and owners of pure electric vehicles are often worried about the attenuation of the power battery and the “shrinking” of the vehicle's cruising range. Here is an “imbalance problem” chart that allows users to understand the state of the vehicle. The problem of imbalance refers to the corresponding relationship between the maximum voltage of the power battery cell (cell) and the SOC. In simple terms, after the battery cell voltage reaches the upper limit, the vehicle will stop charging. At this time, the vehicle SOC value should reach 99%- 100%. If the SOC value is too low, it proves that the battery system has poor consistency (some cells have high voltages and some cells have low voltages), or the battery is attenuated.

Finally, there are two more data on the special caller app that need attention. The spontaneous combustion of pure electric vehicles is caused by thermal runaway of power battery in many cases. If users can monitor the battery temperature and find the problem in time, it may be possible to avoid thermal runaway, at least to find and solve the problem. Of course, different models have different thermal management strategies. For example, some models set the safety temperature of the power battery higher. 30-40℃ may be the normal temperature range of the battery; the user can compare the battery temperature of the car with other vehicles in the same area. Compare for reference, if the vehicle is abnormal, it should be checked and repaired in time.

For our ordinary users, you may think these data and charts are too cumbersome, even if you can understand them, you don’t usually bother to read them. It doesn't matter. I think the more important meaning of the special call “Vehicle Safety File” is to provide early warning and reminder. If you see abnormalities in the vehicle often, you can go to the 4S shop for overhaul.

At the beginning of 2018, the number of charging apps reached hundreds, but now there are basically 3-5 apps with practical application value left. Such products are similar to pure electric vehicles. They started with the big wave, and finally passed the elimination of the market and users, and only a few products survived. In the current charging apps, there are actually many additional functions like special call vehicle safety files that are worth exploring, such as small functions such as itinerary planning.

to sum up:

In response to user pain points, we hope that each charging app can introduce more useful and practical functions. Do you think the special call “vehicle safety file” is valuable? The special caller in front of the screen, have you paid attention to this feature in the App? Or do you think there are any other bright features of the charging App? Welcome to chat together in the comment area.