Why do trams consume electricity quickly in winter?

Lithium batteries have an impact on cruising range in cold winter.

The working principle of lithium-ion battery is that the internal electrolyte changes through chemical reaction, and there is a potential difference between the positive and negative electrodes, thus generating current. In the low temperature environment, the movement of electrolyte is quite slow, which affects the transfer activity of lithium ions between the positive and negative electrodes, resulting in the decline of battery charge and discharge performance.

Simply put, in a low temperature environment, it is not that the lithium battery is really dead, but that there is electricity but it cannot be released normally. Some analysis data show that the capacity of an ordinary lithium battery will be reduced by 20% at zero degrees Celsius, and it may be only about half when it reaches MINUS 10 degrees Celsius.

Extended data:

Precautions for winter use:

1, find a warm place to charge.

When the ambient temperature is lower than 0℃, when the electric vehicle is charged, the system will automatically heat the battery first. When the battery core temperature reaches above 5℃, the vehicle will really start charging. Some electric car owners will feel that the speed of charging electric cars suddenly slows down in winter, which is actually the extra time to heat the batteries before charging the vehicles.

Therefore, when the owner usually charges the car, try to choose underground parking lots, closed garages and other places. This will help to improve battery activity, not only reduce the loss of cruising range, but also improve charging efficiency and save time.

2. Charge the battery briefly before going out.

The day before, the electric car still had 60% or 70% electricity, but when I started the car the next morning, I found that the electricity was only 30% or even less. Some people call this situation "power failure". In fact, this "power outage" is not a fault, but a disaster caused by low temperature. When the electric vehicle is running, the battery is in a state of continuous discharge, the temperature will be higher and the voltage of the battery will be higher. At this time, the remaining power of the electric vehicle is normal.

But after parking at low temperature all night, the battery has cooled down and the voltage has dropped. At this time, the on-board system will automatically adjust the displayed power and cruising range, giving people the illusion of "no power". In this case, it is usually enough to go out early and charge the battery for 10 minutes.

Drive steadily, don't worry.

In the process of driving an electric car, you should start slowly to avoid violent driving methods such as sudden deceleration, sharp turn and sudden braking. Good driving habits can effectively reduce the speed of battery consumption. The time for starting the car every time should not exceed 5 seconds, and the interval for starting the car again should not be less than 15 seconds.

If the cruising range drops too much, you should go to the 4S shop to check the battery of the car in time, replenish the electrolyte of the battery in time, and adjust the proportion of electrolyte.

Hope to adopt, thank you!