Recently, the ** Meteorological Observatory issued a yellow warning for cold waves, blizzards, and freezing, and there are heavy to heavy snowfalls in Beijing, Hebei and other places, and the minimum temperature in some areas will fall below the extreme value of the same period in history.
According to the -30 test results previously announced by a platform, the endurance achievement rate of new energy vehicles is generally only 3-5 folds. However, this has also caused car companies to question that the test does not meet the daily use scenarios of users.
For many new energy vehicle owners, the original intention of buying a car is not for 100-meter acceleration, in-situ U-turn and other performance, to put it bluntly, to save money. However, winter batteries are not durable, and there are essential reasons for their materials.
1.Temperature has an effect on the rate of chemical reactions in the battery, and low temperatures will cause the rate of chemical reactions inside the battery to decrease, which will affect the performance and range of the battery.
2.Low temperatures cause the internal resistance of the battery to increase, and the voltage of the battery decreases at a given current, which reduces the output capacity of the battery.
3.At low temperatures, the energy density of the battery is also affected, reducing the battery's energy storage capacity.
In addition, the use of heater air conditioning by car owners in winter will also consume a certain amount of electricity, so the winter battery life of new energy vehicles will drop significantly.
Battery capacity attenuation in low temperature environment is its inherent characteristic, there is no need to dwell on this matter, put the problem on the table, one is to let users know in their hearts, timely replenishment. The second is to let car companies and battery companies also have points in their hearts and think about technological improvements.
Of course, now our new energy development can be described as changing with each passing day, in order to overcome the problem of low temperature and indurable battery, some new energy vehicle manufacturers are also making continuous efforts and taking a lot of measures, such as:
1.Incorporate a battery thermal management system to improve performance at low temperatures by heating the battery. For example, the BYD seal standard wide temperature range high-efficiency heat pump system, which can work stably within -30 40, can not only achieve stable battery performance output, but also increase the endurance by 20% at -30.
2.Optimize the structure and materials of the battery to improve the low temperature adaptability of the battery.
3.In winter, new energy vehicles are warmed up in advance to increase the operating temperature of the battery.
It should be noted that although the low temperature and indurability of new energy batteries is a common problem, the performance of batteries of different brands and models will be different. When buying new energy vehicles, consumers can consult professionals and choose models with better low-temperature adaptability. When using new energy vehicles in a low-temperature environment, you should also pay attention to the temperature and mileage of the battery, and take appropriate measures to protect and maintain the battery. If.
If the vehicle is parked for more than a week, it is best to recharge it after a week. Try to avoid charging the car in an environment below 0, and give preference to charging in an indoor parking lot or when the temperature is high in the afternoon. The car should be charged in time after use in winter to ensure that the remaining power of the car is more than 20%. When using the car, the battery power cannot be completely used up, and if the power is empty, it may cause damage to the new energy vehicle battery. Every time the car owners drive, if they find that the remaining power is about to fall below 20%, they should stop and charge in time.
Nowadays, new energy electric vehicles can reach 1000 kilometers of endurance, which can be said to have broken through the limit of fuel vehicles, but it is still too early to say that it will "kill" fuel vehicles in the future.
The original intention of some things to be good and cheap is good, but we must consider the reality, since we have chosen the economy as the primary premise, the situation of "power failure" and "virtual electricity" should be taken into account.