Component Description For Battery Management System Control Unit - GF54.10-P-3012FGH
Model 213.016/216 with engine 654.920 up to model year 2021
Model 213.050/053/153 with engine 274.920 up to model year 2021
Shown on model 213.0
Location
The battery management system control unit is integrated into the high voltage battery module.
Interlock circuit
The interlock circuit is used as contact protection to protect people against inadvertent contact with high-voltage components. The interlock is an anticipatory contact which opens a little before the high-voltage connections when opening a high-voltage connection. In this way timely discharging of the high voltage intermediate circuit is achieved by the control units of the high-voltage components.
In order to do this, a 12 V/88 Hz interlock signal is looped through all assembly parts of the high voltage on-board electrical system that can be removed or opened. To do this there is an electrical bridge in each removable high-voltage connection which interrupts the interlock circuit during removal of the high-voltage connection. The interlock circuit is also led switched in a series over the 12 V control units plug connection of the high-voltage components.
Tasks
The battery management system control unit operates in an electrical network with the sensors and actuators of the high-voltage on-board electrical system to provide battery management of the high-voltage system.
The battery management continuously determines and monitors the following high-voltage battery data:
- Interlock circuit
- Voltage
- Current flow
- Temperature
- State of contactor
- Status of high voltage on-board electrical system insulation monitoring control unit
The battery management system control unit is connected over the hybrid CAN (CAN L) to the vehicle's CAN network and it exchanges data with other control units.
Input and output signals
- Direct input/output signals
- Power connections
- CAN input/output signals
- LIN input/output signals
Input factors and initial parameters for the following components are read in or output over direct lines by the power electronics control unit and are needed by the engine timing:
| Input factors over a direct line | Initial parameters over a direct line | Supplemental information |
|---|---|---|
| Circuit 15 | - | - |
| Circuit 30 | - | - |
| Circuit 30c (crash signal from pyrofuse (F63)) | - | - |
| Crash signal | - | - |
| Circuit 31 | - | - |
| Interlock circuit | Interlock circuit | - |
The following component parts are connected through power connections to the battery management system control unit:
| Power connections + | Power connections - | Supplemental information |
|---|---|---|
| Power electronics control unit (N129/1) (discharge current from high-voltage battery (A100g1)) | Power electronics control unit (N129/1) (discharge current from high-voltage battery (A100g1)) | - |
| Power electronics control unit (N129/1) (charging current to high-voltage battery (A100g1)) | Power electronics control unit (N129/1) (charging current to high-voltage battery (A100g1)) | - |
| Charger (N83/5) (charging current to high-voltage battery (A100g1)) | Charger (N83/5) (charging current to high-voltage battery (A100g1)) | - |
Input and initial parameters for the following control units are sent or received by the battery management system control unit over LIN or CAN:
| Input factors via hybrid CAN (CAN L) | Output factors via hybrid CAN (CAN L) | Supplemental information |
|---|---|---|
| Charger (N83/5) | Charger (N83/5) | - |
| Powertrain control unit (N127) | Powertrain control unit (N127) | Contains signals of further control units which are connected via the CAN network. |
| Power electronics control unit (N129/1) | Power electronics control unit (N129/1) | - |
| Input factors over battery sensor-LIN (LIN B15) | Initial parameters over battery sensor-LIN (LIN B15) | Supplemental information |
|---|---|---|
| Switchover valve for 2 low-temperature circuit (Y73/2) | Switchover valve for 2 low-temperature circuit (Y73/2) | - |
| Wiring diagram for battery management control unit | PE54.10-P-2104-97DBA |