Why does the battery life of electric vehicles get worse in winter? What does this have to do with the weather?

In winter, due to the temperature drop, the battery storage capacity of electric vehicles decreases. The cold weather in winter also leads to the decrease of tire pressure and the increase of resistance, and the increase of wind resistance area of people driving electric vehicles, which in turn leads to the increase of power consumption. These are normal phenomena and are not caused by the failure or damage of electric vehicles.

In winter, people will find that their electric vehicles and other devices that use batteries suddenly become less durable, and the cruising range of electric vehicles will suddenly drop sharply. This is actually a very normal phenomenon, and there are two reasons for this phenomenon. The first is the influence of cooling on the equipment itself, and the second is the influence of the weather on the driver. First, the influence of cold weather on the equipment itself; Almost 80% of electric vehicles in the market use lead-acid batteries. The optimum temperature of lead-acid battery is between 20 ~ 30℃. In this range, the battery has the highest charging and discharging efficiency and the best effect. The temperature drop in winter will greatly affect the storage and discharge capacity of batteries. When the ambient temperature drops to 0℃, the charging and discharging efficiency of the battery is only about 70% of that in normal environment. And when the temperature drops, the tire pressure of electric vehicle tires will change. Due to the principle of thermal expansion and contraction, the tire pressure will become smaller, resulting in increased friction and more power consumption. Second, the influence of the weather on drivers. In winter, unprotected foreign drivers must wear heavy cotton-padded clothes. Compared with hot summer, drivers will gain weight and wind resistance. Even some electric vehicles will be covered with protective equipment to keep out the cold and wind, further increasing the resistance when driving, resulting in more obvious power loss. Moreover, due to road problems in winter, it will also lead to frequent braking and starting, leading to unnecessary electricity consumption. ?

The deterioration of electric vehicle endurance in winter is related to the drop in temperature, which is a very normal phenomenon. I also hope to spread this knowledge to the audience so as not to be cheated by the maintenance shop staff.