The most suitable working temperature (charging and discharging) of power lithium batteries used in pure electric vehicles is 35～45℃. When used in severe cold areas in winter (such as temperatures below -25℃), the discharge performance and charge acceptance capacity of power lithium batteries are affected by low temperature. The impact is greatly reduced.
If you can't start the car in the cold winter, it is likely to be the cause of the battery. The cold climate greatly reduces the efficiency of the chemical reaction in the battery and increases the internal resistance of the battery. These two factors are superimposed, causing the battery's starting power to decrease as the temperature decreases. The curve on the right shows the relationship between battery capacity and temperature.
On the other hand, according to the statistics of the International Battery Institute, the starting power required by cars in winter is 40% to 70% higher than in summer. Therefore, at 0°F (-18°C), a fully charged battery can only provide 40% of the starting power, even if the battery is a brand new battery in good condition. Therefore, it is very important to preheat the battery in order to realize its full potential.
