Entering winter, many places in the north have already entered sub-zero levels. Of course, there will be an old topic again, that is, the battery life of pure electric vehicles is getting worse. I believe that everyone has seen the hot news about Aion S in the past few days. Many car owners report that the vehicle endurance is calibrated to 500km, but in winter it can only run to 200km, and the cruising range is reduced by more than half. This is not for consumers. accept. So some netizens left a message and asked, why the battery life of pure electric vehicles is not good in winter? So today, I will come to popularize this issue for everyone.
If we are in the north, we should have all experienced that if the mobile phone is taken out in a cold environment for a long time, it will be "freeze off" directly, even if there is a lot of power. And then put the phone in a warm place, you can restart it again and the battery will not change.
In fact, most electric vehicles, like mobile phones, use lit
Entering winter, many places in the north have already entered sub-zero levels. Of course, there will be an old topic again, that is, the battery life of pure electric vehicles is getting worse. I believe that everyone has seen the hot news about Aion S in the past few days. Many car owners report that the vehicle endurance is calibrated to 500km, but in winter it can only run to 200km, and the cruising range is reduced by more than half. This is not for consumers. accept. So some netizens left a message and asked, why the battery life of pure electric vehicles is not good in winter? So today, I will come to popularize this issue for everyone.
If we are in the north, we should have all experienced that if the mobile phone is taken out in a cold environment for a long time, it will be "freeze off" directly, even if there is a lot of power. And then put the phone in a warm place, you can restart it again and the battery will not change.
In fact, most electric vehicles, like mobile phones, use lithium batteries, and the discharge of lithium batteries is mainly achieved by chemical reactions, and temperature is one of the important factors that affect chemical reactions. The two poles of the battery rely on the electrolyte to conduct electricity. If the temperature is too low, the fluidity of the electrolyte will become worse, and the current will be smaller and smaller. Either the electrolyte will be solidified and stop the reaction, or the current generated is not enough to support electricity.
The simple answer is that when the temperature is low, it is close to the freezing point of the electrolyte, it will become more and more viscous until it solidifies, and lithium ions can't swim in the electrolyte, and the ability to generate electricity decreases.
If lithium batteries are used, then this problem will definitely be faced. It is inevitable. Therefore, many pure electric manufacturers have begun to come up with various countermeasures. For example, the battery liquid constant temperature system we often see is equivalent to putting on a battery for the battery. Clothes, and ensure that it is warm in winter and cool in summer, can cool the battery, and quickly bring the battery to working temperature.
Of course, like Aion S is actually equipped with a smart temperature control system, but the battery life is also seriously compromised. Why? This involves the second issue that affects battery life in winter, air conditioning.
The air-conditioning heating principle of a fuel vehicle is simple. It can directly rely on the temperature of the engine to provide warm air, which is more energy-efficient than cold air. However, pure electric vehicles are just the opposite of fuel vehicles. The heating of the warm air is realized by the resistance wire, which consumes a lot of power, which consumes more power than the power supply for the compressor. Therefore, turning on the heating air in winter will also damage the battery life. . Another car owner said that I can only run 200 kilometers after turning off the air conditioner. Isn't this still a battery problem?
This brings us to the third condition that affects battery life, its own battery management capabilities. At present, most of the domestic pure electric vehicles still use 60 constant speed battery life to calibrate the promotion when they are publicized. In terms of electric vehicles, its real-time speed of 60 is indeed the most energy-efficient. In theory, the endurance of working conditions can be regarded as the true endurance.
Many manufacturers have also begun to make batteries based on the constant speed 60 standard, so serious battery life loss is prone to occur in the case of non-constant speed 60. For example, many Aion S owners are Didi owners, and the road conditions are complicated every day. So if the battery management is not balanced, there will be a lot of difference from the calibrated mileage.
Summarize
At present, the vast majority of pure electric vehicles will experience a loss of cruising range in cold conditions. This is a common problem. It has not been done in terms of battery temperature and can rarely be affected by natural temperature. Of course, from an objective point of view, it is not. Consumers in cold northern regions are advised to buy pure electric vehicles, because in addition to the drastic reduction in mileage, they also have the characteristics of slow charging. All efficiency will be reduced. In comparison, fuel vehicles are more reliable.
