Why are the batteries of electric vehicles afraid of freezing?

1, in extremely low temperature environment, such as below 0-20℃; The water content of the electrolyte in the battery has been frozen.

2. The battery activity is lost (the redox reaction conditions are destroyed), so it cannot be charged.

3. Move the electric car or battery indoors; After the battery temperature slowly rises to the indoor temperature; Continue to charge indoors.

Electric vehicle batteries are afraid of freezing in winter. In cold weather, the mileage of electric vehicles can be reduced by 40% to 50%, and they cannot be charged below zero. In fact, the fear of cold in electric vehicles comes down to the fear of cold in batteries, and almost all the "side effects" come from this problem. In addition to the battery life will be greatly reduced, the charging speed and performance will also be affected to varying degrees.

Extended data:

Maintenance method

Correct use of charger

1. Determine whether the AC power supply matches the input voltage of the charger.

2. Determine whether the output voltage of the charger is consistent with the rated voltage of the battery.

3. Insert the charger into the battery box first, and then plug in the AC power supply.

4. When the charger is used indoors, it should be moistureproof and shockproof. It is forbidden to cover it when charging, and it should be placed in a ventilated and heat-dissipating place.