BYD Han has a battery life of 605 kilometers and only ran 230 kilometers. Is the battery seriously attenuated？ You think wrong!

Recently, with the sharp drop in the national temperature, the old problem that the battery life of electric vehicles has been greatly reduced has begun to appear again, and it has been denounced by the people all over the country on the Internet, involving almost all electric vehicle brands, especially Wuling, MODEL3 and Han, which are in the front row of sales.

Among the numerous crusades, there is a Shanxi netizen whose net name is "Handsome Brother". He broke the news that he bought the Han EV with a long battery life of one and a half months, and only ran for 230 kilometers from full charge to 5% left, which was nearly two-thirds less than the battery life of 605 kilometers.

Judging from the screenshot of the post, the post has a lot of traffic, with 352 likes and 1044 comments. Many people think that the attenuation of power battery actually reaches 62%. The author also thinks this data is incredible. After reading many articles, many people have got the concept wrong.

The author has been focusing on new energy vehicles for many years, and is very aware of the three killers that affect the battery life: battery attenuation, low-temperature activity of batteries, and high power consumption of heating and air conditioning. The battery life of a series of well-known electric vehicles that have been exposed recently is actually caused by the joint action of the three.

First, battery attenuation:

At present, the technology of power battery is very mature, and the attenuation of battery in normal use is actually very low. As long as it is used according to the instructions, the natural attenuation of battery is within the controllable range, and it can almost be used for vehicle scrapping.

Second, the low-temperature activity of the battery is reduced:

The research data show that at 0℃, the capacity of Ferrous lithium phosphate power battery is only 88% of that at 25℃, which is 12% lower. The reason is that power batteries are basically lithium-ion batteries, and the activity of lithium-ion will decrease at low temperature, and the lower the temperature, the lower the activity.

Third, heating and air conditioning power consumption:

Electric vehicles run on power batteries. Apart from the controllable attenuation and activity reduction, the power consumption of heating and air conditioning can be said to be the biggest culprit in reducing the battery life of electric vehicles. Taking the actual measurement by netizens as an example, Han EV heating and air conditioning is used at about 0 degrees, about 4KW/ hour for the first hour and about 2KW/ hour for continuous use.

Understand the above concepts, and then look at the use of Han EV of Shanxi car owner "handsome brother", which is easy to understand.

Some media reported that the owner used heating and air conditioning when driving. This is understandable. In November, the average daily temperature in Shanxi is about 5 degrees. If you don’t turn on the air conditioner, your hands will be stiff.

There is another detail in the post of "Handsome Brother": "I took the car with full electricity at the end of October, and now I have rushed twice, driving a total of 744 kilometers. After reading the posting time, on November 27, everyone should understand.

According to the owner, he charged the battery three times in a month or so, with a total journey of 744 kilometers and an average battery life of 248 kilometers, which is really consistent with the last time he said that he only ran 230 kilometers.

However, I noticed another data: "handsome brother" traveled 744 kilometers a month, with an average of 24.8 kilometers a day. This data is not high, which represents the daily driving of the vast majority of car owners and is basically equivalent to the average daily driving of passenger car owners in China.

So low, judging that "handsome brother" should be an office worker, he goes to and from work every day, four times a day, driving for several kilometers at a time, and 80% is driving in the urban area.

According to the normal driving speed in urban areas, the average speed will generally not exceed 20km/h, that is to say, "Handsome Brother" ran 744km after three times of charging, and the driving time may be as high as 37 hours or more. According to the heating data of Han air conditioner provided by netizens, in the first hour, it consumes about 4KW per hour, and if it keeps driving, it consumes about 2KW/ per hour later.

"Handsome brother" always travels only 24.8 kilometers every day, and the air conditioner will not be turned on for a long time every time, that is, it is in the most power-consuming interval, 4KW/ hour.

The battery life of electric vehicles is calculated by the time, but the air conditioner is not calculated by the time. Han runs 230 kilometers with a full charge of 76KW, and it takes about 9 hours to run in the short distance in urban areas. Only the air conditioner consumes electricity, it will use up 36KW, and then subtract 5% of the battery balance of about 4KW, leaving 36KW for driving. According to the proportional calculation, the normal battery life should be about 286 km.

Because the heating and air conditioning use a lot of electricity, the battery life for real driving is only about 286 kilometers, and then the battery activity is reduced by 12% at a low temperature of about 0 degrees, which is about 250 kilometers, which is basically consistent with the actual measurement of "handsome brother".

At this point, the truth is clear. Whether it is Han EV, MODEL3 or Wuling, the reason why the measured battery life is more than half is not the battery attenuation or the battery activity reduction, but the hot air conditioner is turned on.

Write at the end:

The author has been paying attention to new energy vehicles for many years, and sincerely advises consumers who are going to buy cars. If you don’t have fixed parking spaces and charging piles, it is really not recommended to buy electric vehicles, even for the sake of licenses! If you insist on it, first of all, you will be unhappy and full of complaints. Secondly, it is also a negative harm to the development of new energy vehicles, harming others and yourself.

For car owners with fixed parking spaces and charging piles, it is not a big problem that the battery life is greatly reduced by turning on the air conditioner in winter. After all, the current electric car has a battery life of 500 to 600 kilometers. Even if the air conditioner is turned on all the time, the battery life is enough for most people.

In fact, if you have a fixed parking space and a charging pile, park your car in the garage every night, hang up the charging pile and go home to sleep. This is the correct way to turn on the electric car. If you are used to it, it is really more convenient than refueling. It takes a lot of time to go back and forth to the gas station. Under the current situation of urban traffic jams.

Easy car number author provides articles.