Battery Current Sensor: Description and Operation

Battery sensor

NOTE: Caution when jump-lead starting: Always connect the charging cable/jump leads directly in the engine compartment as otherwise the battery sensor could be damaged.

The battery sensor is located on the negative terminal of the battery, it is part of the energy management system (battery management). The battery sensor is connected between the negative terminal of the battery and the ground cable.

The purpose of measuring the battery size is to determine the battery condition with sufficient accuracy and to identify closed-circuit current faults in vehicle electrical system diagnosis in production and service.

The following measured variables are measured directly by the sensor
- Battery current
- Battery voltage
- Measurement of the temperature at the negative terminal

The battery current and battery voltage are measured simultaneously.