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Winter Low temperature battery use matters needing attention, key points please remember!

December 23, 2020

Winter battery use matters needing attention 4 key points please remember!

 

In the cold winter, there are not a few reports of lithium-ion batteries shrinking and charging slower, because low temperature will have a great impact on lithium batteries, battery life loss at low temperature is a long-standing problem.

 

Atualmente, most of the electric vehicles on the market, even electronic digital products, use lithium batteries, such as mobile phones in winter on the consumption of electricity is particularly fast, pure electric vehicle batteries are the same reason, It can be seen that the performance characteristics of batteries at low temperature and normal temperature are different. The difference is mainly due to the change of temperature affecting the chemical reaction inside the lithium battery.

 

the electrochemical reaction of lithium batteries at the electrode/electrolyte interface is related to ambient temperature. The viscosity of electrolyte decreases at low temperature. The conductivity decreases and the activity of active substances decreases. The concentration difference of electrolyte will be larger, the polarization will be enhanced, and the diffusion rate of lithium ion in negative electrode will be slower. It is easy to precipitate lithium. The temperature decreases and the reaction rate of the electrode decreases. Assuming that the battery voltage remains constant and the discharge current decreases, the battery power output will also decrease.

 

According to the relevant measured reports, in vehicle batteries, the performance of power batteries in environments below 10°C will begin to be affected, but the impact is not significant. Less than 0°C will be significantly affected, and then -20°C as an inflection point, at this time the effect of temperature on battery discharge performance is very significant.

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

 

1. vehicles are parked in the indoor garage. When parking, parking pure electric vehicles in the garage as far as possible can reduce the impact of low temperature on the power battery, thus reducing the loss of mileage. This at least to the pure electric car life will not be greatly discounted, do not affect the next morning the need for pure electric car owners.

2. the battery temperature is high to charge. Low temperature will also affect the battery charging efficiency, so in winter charging, with the best way to charge, the vehicle immediately after the use of charging, at this time the battery temperature is higher, charging efficiency is faster, and can ensure that the battery is effectively filled.

além do que, além do mais, if there is no indoor charging condition, it is best to choose outdoor charging at the highest temperature during the day, which is helpful to improve battery activity and reduce the loss of mileage. Improve charging efficiency and save time.

Preheat the vehicle before 3. travel. The pure electric vehicle is different from the traditional fuel car hot car method. Before using the pure electric vehicle, the battery will be recharged and preheated, and the battery will gradually heat up during the charging process. The coolant stored in the battery pack will gradually heat up.

4. make good use of kinetic energy recovery system. When driving a car to go out, we should pay attention to slow acceleration start, smooth driving, try to avoid fierce acceleration, sharp deceleration, brake and other fierce driving methods, because during fierce driving, the battery of electric vehicles needs to release a lot of electricity to increase the speed, which will make the power drop rapidly. Smooth driving can reduce energy consumption and prolong the mileage.

 

Ao mesmo tempo, pure electric vehicle owners can make more use of kinetic energy recovery system, increase additional life, but also greatly improve the safety of ice and snow pavement, after all, in the snow brake easy to lose ground grip.

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