Automobile-propre looks at the effect of a cold battery on DC charigng times. When a battery is cold, there is greater internal resistance and therefore risk of damage if you were to charge at the same speed as with a warm battery. 

Battery preconditioning, which is commonplace on most new EVs, helps to bring the battery to (or close to) its optimum temperature before DC charging is initiated, either activated manually by the driver or along a pre-calculated route and in time for arrival at a scheduled charging stop. Some cars can also rapidly heat the battery once plugged in to a charger, and not lose much or any time when plugged in cold.

Car manufacturers often take different approaches when deciding how much to limit charging speed when cold, either out of an abundance of caution regarding battery degradation (combined with specific characteristics of the cells used). Automobile-propre ntoed that the Kia EV6 58kWh, Vinfast VF6 and DS No.8 (ACC 100kWh) are particularly sluggish in the cold, the **EV6 58kWh needs an extra 13 minutes** in the cold and the **DS No.8 needed an extra 12 minutes** (without preconditioning). The **BYD battery** **used in the e-3008** needed an extra 9 minutes, while the **CATL battery in the e-308 51kWh** **had fewer problems with only an extra 5 minutes needed**.

The BYD Dolphin 60kWh, Renault Scenic 87kWh, Tesla MY Standard 60kWh **lost 7 minutes when charging from cold.** The Audi A6 e-tron (4 minutes), ID.3 (3 minutes), Mercedes CLA and ID Buzz (both 2 minutes) fared better.

The **Hyundai Inster, Kia EV3 and EV4 show no difference between cold and warm batteries,** AP theorises that the manufacturer has limited the charging power, since these cars maintain a very flat curve till 65% (perhaps to prevent rapidgate or limit degradation), perhaps these cars could achieve faster speeds (with warm batteries) if the manufacturer wouldn't be as conservative. For these cars, the preconditioning system does not buy any extra time.

AP notes that in general not preconditioning costs 6-7 minutes. Although, this only holds true for a 'full' charge from 10-80%, allowing the battery to heat up while charging, when topping up from a higher SoC it may be useful to precondition the battery. 

Original Link (French):  [https://www.automobile-propre.com/articles/voitures-electriques-les-recharges-a-froid-sont-elles-vraiment-plus-lentes/](https://www.automobile-propre.com/articles/voitures-electriques-les-recharges-a-froid-sont-elles-vraiment-plus-lentes/)

How does a cold battery affect charging time (16 models tested) | automobile-propre