Battery disconnect method and system

摘要

A battery disconnect system includes means (30) for measuring the current output voltage (U) of a battery. A differentiator (32) determines the first time derivative of the output voltage. A second differentiator (34) determines the second time derivative of the output voltage. A reference voltage (UREF) is calculated from the first and second derivatives. Load is disconnected from the battery when the output voltage falls below the reference voltage.