Why do AC EV Charger charge slowly in winter? What impact does low temperature have on vehicles and charging efficiency

When winter comes, many new energy vehicle owners find that the charging speed slows down significantly, and even after inserting the gun, there is no movement for half a day. This is not actually the AC EV Charger breaking down, but rather the low temperature causing trouble.

The optimal operating temperature for batteries is usually between 20 and 30 degrees Celsius. After the temperature drops, the electrolyte inside the battery becomes sticky, the movement of lithium ions slows down, the efficiency of chemical reactions decreases, and the internal resistance of the battery increases. In order to protect the battery and avoid damage, the vehicle battery management system will automatically limit the charging power. Especially for fast charging, it is often necessary to heat the battery at the beginning and gradually increase the power after the temperature rises, so it appears particularly slow

Low temperature not only affects charging, but also affects the vehicle itself. The available capacity of the battery has temporarily decreased, resulting in a decrease in range; Turning on the heater and seat heating consumes more electricity; Kinetic energy recovery may also be limited. In terms of charging efficiency, the same AC EV Charger may be charged to 80% in half an hour in summer, but it may take a lot more time in winter. If the battery is low and parked outdoors, the battery temperature may be too low, and it may not even be able to charge quickly immediately.

To make winter charging faster, you can remember a few tips: try to park in a basement or sheltered place; Charge the battery immediately when there is still residual temperature after using the car; Preheat the battery and cabin with an AC EV Charger before departure; Don't wait until the battery is extremely low before charging. This can not only improve charging efficiency but also reduce long-term battery damage caused by low temperatures.

Overall, slow charging in winter is a self-protection of the battery, not a malfunction. Understanding the impact of low temperatures on vehicles and charging efficiency, adjusting usage and charging habits, can make winter travel more comfortable.