DCIR Testing: Measure Battery Internal
DCIR testing is a core and critical method for evaluating battery performance, state of health (SOH), and safety. Its importance
To measure the internal resistance of a battery, two primary methods are commonly used: the DC load method and the AC impedance method. DC Load Method: This method involves applying a known load to the battery and measuring the voltage drop and current.
Measuring Internal Resistance Internal resistance is commonly measured using techniques such as the impedance spectroscopy method or direct current (DC) load method. Impedance spectroscopy evaluates the AC impedance of the battery over a wide frequency range, providing detailed insights into resistance components.
The DC Load Method measures battery resistance by analyzing its voltage response under a steady load current. This method involves applying a constant current to the battery and monitoring the resulting voltage change.
AC resistance meters apply a constant-current AC signal to the battery. They then detect the minuscule voltage generated by the current and calculate the resistance value. Note that DC resistance meters cannot measure batteries, which have non-zero voltage or electromotive force. Measurement method varies depending on the equipment configuration.
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