Component description for battery management system control unit - GF54.10-P-3012FLM
MODEL 212.095 with ENGINE 276.952 as of model year 2014
MODEL 212.098/298 with ENGINE 651.924 as of model year 2014
Shown on high-voltage battery module
Location
The battery management system control unit is integrated into the high voltage battery module.
Interlock circuit
The interlock circuit is used as protection to protect people against inadvertent contact with contacts of the high voltage components of the high-voltage on-board electrical system which are carrying a high voltage.
A 12 V/88Hz interlock signal is looped here through all high-voltage on-board electrical system components that are to be dismantled or opened. To do this there is a contact bridge in each removable high voltage plug connection which interrupt the interlock circuit during removal of the high voltage plug connection. The interlock circuit is also led switched in a series over the 12 V control units plug connection of the high-voltage components.
Task
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 constantly determines and monitors the following high voltage battery data:
- Interlock circuit
- voltage
- Current flow
- temperature
- Contactor status (A100s1)
Evaluation of input factors
The input factors that have been read in are evaluated by the integrated microprocessor and the affected components are then actuated.
Output of signals and actuation of components
Initial parameter are output over the following connections:
- Direct line
- Hybrid CAN (CAN L)
The front SAM control unit with fuse and relay module (N10/1) is the central interface (Gateway) for exchange of function-relevant data for control units which are connected to the various Control Area Network (CAN) bus systems.
Input and output parameters of the following components are read in or displayed over direct lines by the battery management system control unit:
| Input factors over a direct line | Initial parameters over a direct line | Supplemental information |
|---|---|---|
| Terminal 15 | - | - |
| Circuit 30 (fused) | - | - |
| Circuit 30c | - | (crash signal from pyrotechnical separating element (K88)) |
| Terminal 87 | - | - |
| Circuit 31 | - | - |
| Interlock from electric A/C compressor (A9/5) | Interlock to power electronics control unit (N129/1) | - |
| - | High-voltage battery cooling system shutoff valve (Y19/1) | Supply voltage actuation (ground) |
| High-voltage battery coolant inlet temperature sensor (A100b1) | - | Read in and evaluated internally |
| High-voltage battery cell temperature sensors (A100b2) | - | Read in and evaluated internally |
| High voltage (+) (charging current) | High voltage (+) (discharge current) | High-voltage plug connection |
| High voltage (-) (charging current) | High voltage (-) (discharge current) | High-voltage plug connection |
Input and output parameters of the following components and control units are sent or received by the battery management system control unit over CAN:
| Input factors via hybrid CAN (CAN L) | Starting data via hybrid CAN (CAN L) | Supplemental information |
|---|---|---|
| CDI control unit (N3/9) (with diesel engine) or ME-SFI control unit (N3/10) (with gasoline engine) | CDI control unit (N3/9) (with diesel engine) or ME-SFI control unit (N3/10) (with gasoline engine) | - |
| Fully integrated transmission control unit (Y3/8n4) | Fully integrated transmission control unit (Y3/8n4) | - |
| Power electronics control unit (N129/1) | Power electronics control unit (N129/1) | - |
| Diagnostic connector (X11/4) | Diagnostic connector (X11/4) | Over diagnostic CAN (CAN D), front SAM control unit with fuse and relay module (N10/1), CDI control unit (N3/9) (for diesel engine) or ME-SFI [ME] control unit (N3/10) (for gasoline engine) and the hybrid-CAN (CAN L) |
| Designation | Unit | Values | Tolerance range | Remarks |
|---|---|---|---|---|
| Battery management system control unit (N82/2) | ||||
| Voltage supply | V | 13.5 | ||
| Voltage limit: Minimum Maximum | V | 5.5 | For t<100 ms | |
| V | 19.0 |
| Wiring diagram for battery management control unit | PE54.10-P-2104-97DAA |