openinverter forum

paaa wrote: ↑Thu Aug 11, 2022 8:39 pm I used car scanner to check details on a 2018 28kwh , I would imagine you might be able to try and splice into the can lines and 12v to see if it works with a obd socket spliced on , I found a can log online for a 28kwh if that's of any use to you.

           |---------------|
/---------------------------------------\
| 11 10 |   9  8  *  *  5  4  3 |  2  1 |
|       |  --------    -------- |       |
|  * 21 |   *  *  *  *  *  * 14 | 13 12 |
|       |  --------    -------- |       |
| 33  * |  31 30 29 28 27 26  * |  *  * |
\---------------------------------------/

• 1 & 2 - Memory Power 12V (powered all times, 15A BMS fuse)
• 12 - "IG3" relay power 12V (on when vehicle is "on", 10A fuse)
• 10 & 11 - P-CAN High & Low (powertrain CAN, main control channel for BMS)
• 15 & 16 - QC CAN High & Low (marked unused and not populated in the harness diagram, I guess this is used in-factory)
• 3 & 14 - Service plug interlock (in engine bay, connection closed for normal operation)
• 4 - Quick Charge (+) relay control (to HV Junction block)
• 26 - Quick Charge Relay ground (to HV Junction block)
• 5 - Quick Charge (-) relay control (to HV Junction block)
• 9 - Quick Charge temperature signal
• 31 - Quick Charge temperature GND
• 13 - Crash Output from SRS ECU
• 8 - Radiator Outlet Temperature Sensor Signal
• 30 - Radiator Outlet Temperature Sensor GND
• 21 - Coolant 3-way Valve Control (coolant valve)
• 29 - Coolant 3-way Valve GND
• 27 - BMS Heater Temperature Sensor Signal (I think not there on my AU car)
• 28 - BMS Heater Temperature Sensor GND

projectgus wrote: ↑Tue Sep 13, 2022 5:04 am Nice stuff! I have a crashed 2019 Kona sitting outside. I'm hoping to run the full BMS in a transplanted vehicle (rather than going one layer down and talking to the the cell monitor units, as some others on here are successfully doing.)

I am hoping the battery pack control would be similar between 2019 Kona and 2020 Ioniq, It's hard to tell from the photo how many pins are in the external socket in your photo, it looks like it could be similar or maybe it has fewer pins?

On the Kona, the plug is KET MG656922-5 and the pinout (Kona connector number EB11) is:

Code: Select all

           |---------------|
/---------------------------------------\
| 11 10 |   9  8  *  *  5  4  3 |  2  1 |
|       |  --------    -------- |       |
|  * 21 |   *  *  *  *  *  * 14 | 13 12 |
|       |  --------    -------- |       |
| 33  * |  31 30 29 28 27 26  * |  *  * |
\---------------------------------------/

(This might be mirrored left-to-right for you, I wrote it down based on the harness connector. My car is still mostly intact so I haven't verified it.)

Here are my (unverified) notes on the external connector pinout:

• 1 & 2 - Memory Power 12V (powered all times, 15A BMS fuse)
• 12 - "IG3" relay power 12V (on when vehicle is "on", 10A fuse)
• 10 & 11 - P-CAN High & Low (powertrain CAN, main control channel for BMS)
• 15 & 16 - QC CAN High & Low (marked unused and not populated in the harness diagram, I guess this is used in-factory)
• 3 & 14 - Service plug interlock (in engine bay, connection closed for normal operation)
• 4 - Quick Charge (+) relay control (to HV Junction block)
• 26 - Quick Charge Relay ground (to HV Junction block)
• 5 - Quick Charge (-) relay control (to HV Junction block)
• 9 - Quick Charge temperature signal
• 31 - Quick Charge temperature GND
• 13 - Crash Output from SRS ECU
• 8 - Radiator Outlet Temperature Sensor Signal
• 30 - Radiator Outlet Temperature Sensor GND
• 21 - Coolant 3-way Valve Control (coolant valve)
• 29 - Coolant 3-way Valve GND
• 27 - BMS Heater Temperature Sensor Signal (I think not there on my AU car)
• 28 - BMS Heater Temperature Sensor GND

Inside the battery pack, most of these connections run directly from this external connector to the main BMU module connector.

BTW, if you pay 15 Euro to Hyundai Global Service Way then you can access the exact schematic diagrams, connector pinouts, etc for the Ioniq including schematics for inside the battery pack. The above is from notes I took while looking there.

Hopefully this is similar or the same as your pack. I plan to take some P-CAN logs from my Kona soon, and will post here when I do.

projectgus wrote: ↑Tue Sep 13, 2022 11:02 pm Huh, that looks like the same plug but with different pins populated in the centre rows. I guess it was too much to hope that they'd make the packs plug-and-play swappable.

If you've got the battery pack open then you can probably have a look behind this connector to see some of the connections (CAN will be a twisted pair, main power will be thicker wire, etc.) But would recommend diving into the Hyundai site if you can, 15 Euros to look at the schematics can save a lot of headaches.

BTW, I realised my high tech ASCII art pin diagram doesn't render properly in some browsers, so I edited my post with a screenshot of it.

projectgus wrote: ↑Tue Sep 13, 2022 11:02 pm Huh, that looks like the same plug but with different pins populated in the centre rows. I guess it was too much to hope that they'd make the packs plug-and-play swappable.

If you've got the battery pack open then you can probably have a look behind this connector to see some of the connections (CAN will be a twisted pair, main power will be thicker wire, etc.) But would recommend diving into the Hyundai site if you can, 15 Euros to look at the schematics can save a lot of headaches.

BTW, I realised my high tech ASCII art pin diagram doesn't render properly in some browsers, so I edited my post with a screenshot of it.

celeron55 wrote: ↑Fri Sep 16, 2022 8:53 pm Any chance of CAN capture when reading the info using the diagnostic tool? Seems to me it would be useful.

projectgus wrote: ↑Sat Sep 17, 2022 7:27 am FWIW, the PIDs in the scanner requests probably match the ones shown here: https://github.com/JejuSoul/OBD-PIDs-for-HKMC-EVs

projectgus wrote: ↑Tue Sep 20, 2022 12:33 am I'll hopefully get some captures from my Kona's P-CAN bus soon, and will post them once I do. The messages to control the contactors should be in there, with luck they are the same for Ioniq.

vin wrote: ↑Fri Sep 16, 2022 7:35 pm So i've managed to connect a Bluetooth OBD11 to the device's pinout and use CarScanner on an android device to view the cells information on the pack, and the cells seem to be in good shape.