Battery Monitoring Module
Only on vehicles with the function Automatic engine start/stop and/or Brake energy regeneration.
BATTERY CURRENT
The parameter shows the current in respectively out of the battery.
Measurement range: -512- +512 A.
The value shows the vehicle's actual power consumption calculated by the battery monitoring sensor via the Central electronic module (CEM). The battery monitoring sensor registers the current in to or out of the battery and its size. With the ignition on without the external battery or battery charger connected, the vehicle's actual power consumption can be measured. By switching on different consumers their power consumption can be noted.
With the engine running, external battery or battery charger connected, it is only possible to note whether current goes in to or out of the battery and its size. If a consumer is then switched on in the vehicle, it is not guaranteed to be noted as the alternator/battery charger compensates for the current change.
BATTERY VOLTAGE, BATTERY MONITORING SENSOR
The parameter shows the battery voltage at the battery poles.
Measurement range: 0-16 V.
The value shows the battery's current voltage calculated by the battery monitoring sensor via the Central electronic module (CEM).
TEMPERATURE (MAIN) BATTERY
The parameter indicates the battery's calculated temperature.
Measurement range: -40 - 80 °C.
The battery monitoring system calculates battery's internal temperature (battery acid) from the negative pole's temperature with the aim of regulating the correct charging voltage and calculating the correct battery capacity.
CHARGE LEVEL (MAIN LEVEL) BATTERY (SOC STATE OF CHARGE)
The parameter indicates the battery's calculated state of charge.
Measurement range 0-100%.
The value indicates the battery charge level calculated by the battery monitoring system via the Central electronic module (CEM). Expressed as the amount of electrical energy that can be stored in a fully charged battery. Stated in % of full charge. Also called State of Charge, SoC
CHARGE BALANCE BATTERY
The parameter indicates the actual charge balance of the battery.
Measurement range: -100 - +100 Ah.
The value indicates the charge balance calculated by the battery monitoring sensor via the Central electronic module (CEM) for the actual operating cycle. A positive value indicates that the battery is charged with energy (increased its capacity). A negative value indicates that the energy is discharged from the battery (reduced its capacity).
CALCULATING BATTERY STATUS
The parameter indicates the actual status of the battery monitoring sensor's calculation of the battery status.
Not reliable = The sensor's calculation is not reliable.
Reliable = The sensor's calculation is reliable.
There are situations where the battery monitoring sensor's calculations of the battery's status temporarily are not reliable. Applies when charging of the battery takes place directly on the battery's terminals or when resting current consumption is more than 250 mA during 7 days. This means that the sensor never gets the possibility to measure the battery's resting voltage and thus not calculate the battery's charging status. If calculation is not reliable, functions like Brake energy recycling as well as Automatic start/stop of engine are blocked.
STANDBY CURRENT AVERAGE VALUE
The parameter indicates the actual status of the battery monitoring sensor's calculation of the battery status.
Measurement range: 0-250 mA.
In "sleep mode", the battery monitoring sensor registers the vehicle's standby current every minute. The readout indicates the standby current's average value that the vehicle has had over the last 10 hours that the car has been in "sleep mode". The average value of the vehicle's standby current should be less than 25 mA.
COMMUNICATION BATTERY MONITORING SENSOR, STATUS
The parameter indicates the actual status of communication between the battery monitoring sensor and the Central electronic module (CEM) via the serial communication method, LIN.
Following can be shown:
No communication = Communication not working.
Communication ok = Communication works.
In case of communication error, there will be a fault code stored in Central electronic module (CEM).
HINT: In case of a fault or when the fault becomes intermittent, it can take up to 10 seconds for the control module to show the correct status.
BATTERY MONITORING SENSOR, STATUS
The parameter indicates the actual status of the internal checks that the battery monitoring system performs.
Following can be shown:
Internal fault detected - Fault detected.
Fault-free = No fault detected.
In case of detected internal error, there will be a fault code stored in Central electronic module (CEM).
HINT: In case of a fault or when the fault becomes intermittent, it can take up to 10 seconds for the control module to show the correct status.
BATTERY OPERATING TIME SINCE RESET OF BATTERY MONITORING SENSOR
The parameter indicates how long the battery monitoring sensor has calculated the battery to be in the vehicle for.
Measurement range: 0 - 4095 days.
At reset of information about current feed when, among others, the battery monitoring sensor (BMS) is reset, the value for operating time will be reset.
REQUEST CHARGE VOLTAGE ALTERNATOR
The parameter indicates the voltage that the alternator should generate at the actual point of driving.
Measurement range: 10.6 - 16.0 V.
In case of detected internal error, there will be a fault code stored in Engine control module (ECM).
On some occasions the Engine control module (ECM) permits other voltage levels than the request does. This occurs for example when the Engine control module (ECM) activates the brake energy regeneration function.
ALTERNATOR CONTROL
The parameter indicates the actual status of alternator control. The alternator is controlled differently depending on the engine's efficiency, power consumption in the vehicle and the battery's status.
Following can be shown:
Conventional charging.
Brake energy regeneration, slow.
Brake energy regeneration, fast.
Brake energy regeneration, slow without discharge.
Battery reconditioning.
Battery identification.
For further information, see appropriate Design and Function information regarding Brake energy regeneration.