BMW I3 Fast Charging LIM Module
The BMW LIM module is a CCS, CHAdeMO and AC charging controller. It is used to communicate between the vehicle and the public charging infrastructure, to allow fast charging to occur.
As these can be found affordably on eBay and from auto wreckers, they have been pursued as an open-source charger project.
External links
github.com/damienmaguire/BMW-i3-CCS
> CAN logs
Design Guide for Combined Charging System (2015)
LIM versions
Only AC_DCO versions work for CCS. (Check if you have a MAC address on the label!)
| SN | IEC 61851
J1772 (AC) |
DIN 70121 | ISO 15118 | ISO 15118-20 | Cars | Used until | Tested |
|---|---|---|---|---|---|---|---|
| 61 35 9 346 827 | x | x | BMW i3 | ||||
| 61 35 9 346 820 | x | x | BMW i3 | ||||
| 61 35 9 353 646 | x | x | BMW i3 | Jul 2014 | x | ||
| 61 35 9 380 352 | x | x | ? | BMW i3 | Nov 2015 | x | |
| 61 35 6 805 847 | x | x | ? | BMW i3 | Jul 2016 | ||
| 61 35 9 454 319 | x | x | x | ? | BMW i3
Mini cooper SE |
now |
The LIM's are available new from BMW spare parts suppliers for € 240 but there is probably some programming necessary. ???
Power Limits
The limits for pre 2017/26 (Week 26 of 2017) are 0V-500V 0A-250A, post 2017/27 (Week 27 of 2017) 0V-1000V -500A-+500A.
Connectors and Pinouts
| Label | Description | Compatible Plugs |
|---|---|---|
| 4B | 12 Pin Connector | BMW 61138373632
Audi 4E0 972 713 TE 1534152-1 / 1534151-1 |
| 3B | 8 Pin Connector (CHAdeMO models only) | BMW 61138364624
Audi 4F0 972 708 TE 1-1534229-1 |
| 1B | 16 Pin Connector | Hirschmann 805-587-545 |
| 2B | 6 Pin Connector | BMW 61138383300
Audi 7M0 973 119 TE 1-967616-1 |
| X | Replacement Pins | 5-962885-1 |
| X | Rubber Seal | 1-967067-1 |
| Pin # | Function | Description |
|---|---|---|
| 1B-1 | - | |
| 1B-2 | - | |
| 1B-3 | LED_M | Lighting Charge Socket? (Not necessary) |
| 1B-4 | LOCK_MOT+ | Charge Inlet Lock Motor |
| 1B-5 | LOCK_MOT- | Charge Inlet Lock Motor |
| 1B-6 | CAN_H | Powertrain CAN |
| 1B-7 | CAN_L | Powertrain CAN |
| 1B-8 | IGN | Wake up signal +12V (ignition, contact 15) |
| 1B-9 | VCC | Constant Power +12V |
| 1B-10 | GND | Ground |
| 1B-11 | - | |
| 1B-12 | - | |
| 1B-13 | - | |
| 1B-14 | - | Internally connected to GND |
| 1B-15 | CHARGE_E | Goes to KLE. Guessing this is charge enabled signal for the in car charger? or drive interlock signal? |
| 1B-16 | LOCK_FB | Charge Inlet Lock Feedback (1k unlocked, 11k locked?) |
| Pin # | Function | Description |
|---|---|---|
| 2B-1 | CP | Pilot (Charge Inlet) |
| 2B-2 | PP | Proxy (Charge Inlet) |
| 2B-3 | Jumper | Connected to Pin 4 |
| 2B-4 | Jumper | Connected to Pin 3 |
| 2B-5 | GND | Ground (Charge Inlet) |
| 2B-6 | US CCS1 version connected to 2B-2 |
3B Pinout:
- N/A (for CHAdeMO only)
| Pin # | Function | Description |
|---|---|---|
| 4B-1 | HV+_SZ+ | Contactor Control (Contactor coil resistance needs to be ?? ohm) |
| 4B-2 | HV-_SZ+ | Contactor Control |
| 4B-3 | HV+_SZ- | Contactor Control |
| 4B-4 | HV-_SZ- | Contactor Control |
| 4B-5 | U_HV_DC | Charge Inlet DC Voltage (current input 4-20mA?) |
| 4B-6 | LED_RT | Charge Status Light |
| 4B-7 | LED_GN | Charge Status Light |
| 4B-8 | LED_BL | Charge Status Light |
| 4B-9 | LED_GND | Charge Status Light Ground |
| 4B-10 | COV_MOT- | Charge Inlet Cover Motor (Not necessary) |
| 4B-11 | COV_MOT+ | Charge Inlet Cover Motor (Not necessary) |
| 4B-12 | COV_FB | Charge Inlet Cover Feedback (GND if open) |
Wiring Diagram
Required messages
| ID | Function | interval | Notes |
|---|---|---|---|
| 0x112 | BMS msg. | 10ms | |
| 0x1A1 | Vehicle speed | 20ms | |
| 0x3E9 | Main LIM control | 200ms | |
| 0x431 | Battery info | 200ms | needed but does not control anything |
| 0x03C | Vehicle status | 200ms | |
| 0x2A0 | Central locking | 200ms | |
| 0x397 | OBD | 200ms | |
| 0x3F9 | Engine info | 200ms | Rex? |
| 0x3A0 | Vehicle condition | 200ms | |
| 0x330 | Range info | 200ms | |
| 0x432 | BMS SoC | 200ms | |
| 0x51A | Network management | 200ms | |
| 0x540 | Network management 2 | 200ms | |
| 0x512 | Network management edme | 200ms | |
| 0x560 | Network management kombi | 200ms | |
| 0x510 | Network management zgw | 200ms | |
| 0x328 | Counter | 1s | |
| 0x3E8 | OBD reset | 1s | |
| 0x2FA | Lim DC charge command 3. | 1s | |
| 0x12F | Wake up | 100ms | |
| 0x2FC | Charge flap control | 100ms | |
| 0x2F1 | Lim DC charge command 2. | 100ms |
Observations
VIN Numbers is not required for AC or DC fast charging to function
Functional LIMs have come from vehicles where the Air Bags have deployed, indicating that the module still works after a "Safety" event has occurred.