Monitoring device for monitoring charging state of battery cell in e.g. motor car, has voltage measuring device for measuring voltage of cell, where charge state of cell is determined by comparing measured voltage with predetermined voltage

摘要

The device (5) has a measurement circuit (6) for determining a charging state of a battery cell (1) of a battery pack (2). The circuit comprises a temperature measuring device (7) for measuring temperature of the cell, a current measuring device (8) for measuring current flowing through the cell, and a voltage measuring device (9) for measuring voltage of the cell. The device compares the voltage of the battery cell with predetermined voltage to determine a predetermined charge state of the cell, where the predetermined voltage is computed based on an operation expression.