It is generally around 0.30 ohms.
CATL lithium iron battery is a widely used type of battery and its internal resistance is an important indicator of battery performance. Generally speaking, the normal range of internal resistance of lithium-iron batteries is around 0.30 ohms.
Internal resistance refers to the resistance to the current flowing inside the battery when the battery is operating and is divided into AC internal resistance and DC internal resistance. For lithium iron batteries, the AC internal resistance and the DC internal resistance have different values. Generally, the AC internal resistance is greater than the DC internal resistance.