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Please remember the four main points for the use of batteries in winter!

In the cold winter, there are many reports about the battery life shrinkage and slow charging speed of lithium-ion batteries. The reason is that low temperature will have a great impact on lithium batteries. The battery life loss at low temperature is a long-standing problem.

At present, the vast majority of electric vehicles and even electronic digital products on the market use lithium batteries. For example, mobile phones consume electricity very quickly in winter. The same is true for pure electric vehicles. It can be seen that the performance characteristics of batteries are different at low temperature and normal temperature. The reason for this difference is that the change of temperature affects the chemical reaction inside the lithium battery.

The electrochemical reaction of lithium battery at the electrode/electrolyte interface is related to the ambient temperature. At low temperature, the viscosity of the electrolyte decreases. If the conductivity decreases, the activity of the active substance will also decrease. It will increase the concentration difference of the electrolyte, enhance the polarization, and slow the diffusion rate of lithium ion in the negative electrode. It is easy to precipitate lithium. As the temperature decreases, the reaction rate of the electrode also decreases. Assuming that the battery voltage remains constant and the discharge current decreases, the power output of the battery will also decrease.

According to the relevant measurement report, the performance of the power battery in the vehicle battery will start to be affected in the environment below 10 ° C, but the impact is small. When the temperature is lower than 0 ° C, it will be significantly affected, and then - 20 ° C is the inflection point. At this time, the temperature has a significant impact on the battery discharge performance.

Since severe cold and low temperature will have a certain impact on the range of pure electric vehicles, is there any good way to avoid the reduction of the range of pure electric vehicles in winter?

1. The vehicle is parked in the indoor garage. When parking, try to park the pure electric vehicle in the garage, which can reduce the impact of low temperature on the power battery and thus reduce the loss of mileage. In this way, at least the battery life of pure electric vehicles will not be greatly discounted, and it will not affect the owners of pure electric vehicles who need to use vehicles the next morning.

2. Select to charge when the battery temperature is high. Low temperature will also affect the charging efficiency of the battery. Therefore, when charging in winter, the best way is to charge the battery as soon as it is used. At this time, the battery temperature is higher, the charging efficiency is faster, and the battery can be effectively charged.

In addition, when charging in winter, try to find the indoor charging pile. If there is no indoor charging condition, it is better to choose the outdoor charging when the temperature is the highest in the day, which is conducive to improving the battery activity, reducing the loss of mileage, improving the charging efficiency and saving time.

3. Warm up the vehicle before traveling. Pure electric vehicles are different from traditional fuel vehicles. Before using pure electric vehicles, the battery should be charged and warmed up. During the charging process, the battery will gradually warm up, so that the coolant stored in the power battery pack will gradually warm up, and there will be no "run off" of electricity, so as to improve the vehicle's winter performance.

4. Make good use of kinetic energy recovery system. When driving your car out of the door, you should pay attention to slow acceleration and smooth driving, and try to avoid fierce driving methods such as sharp acceleration, sharp deceleration, and sharp braking, because during fierce driving, the battery of the electric car needs to release a large amount of electricity to increase speed, which will cause a sharp drop in the power. The gentle driving mode can reduce energy consumption as much as possible and extend the driving range.

At the same time, pure electric vehicle owners can make more use of the kinetic energy recovery system to increase the additional endurance and also significantly improve the safety on ice and snow roads. After all, slamming on the brake in snow can easily make the vehicle lose ground grip.

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