Kia Niro BMS

User avatar
EV_Builder
Posts: 954
Joined: Tue Apr 28, 2020 3:50 pm
Location: The Netherlands
Contact:

Re: Kia Niro BMS

Post by EV_Builder »

bexander wrote: Tue Sep 20, 2022 9:40 am I contacted Maxim Integrated and they sent me a datasheet:
MAX17845.pdf
It's marked confidential so becarefull... 8-)
Converting an Porsche Panamera
see http://www.wdrautomatisering.nl for bespoke modules.
User avatar
bexander
Posts: 588
Joined: Tue Jun 16, 2020 6:00 pm
Location: Gothenburg, Sweden

Re: Kia Niro BMS

Post by bexander »

EV_Builder wrote: Tue Sep 20, 2022 9:56 am It's marked confidential so becarefull... 8-)
Interesting, I recived it directly from them without any prerequisites so should be ok.
royhen99
Posts: 4
Joined: Sun Feb 20, 2022 4:23 am

Re: Kia Niro BMS

Post by royhen99 »

In my limited experience Analog Devices use NDAs to preserve confidentiality. As they did not require one then it should be ok to release data sheet.
The MAX14823, MAX14843, and MAX14845 all look essentially the same. The only diffence I could find between the 23 an 43 was the aquistion time for die temperature measurement, and between the 43 and 45 is the cell voltage error +/-3.5mV vs +/-10mV ( +/-3.6mV typ).
User avatar
bexander
Posts: 588
Joined: Tue Jun 16, 2020 6:00 pm
Location: Gothenburg, Sweden

Re: Kia Niro BMS

Post by bexander »

I did reexamine the Niro slave boards and they do indeed use the MAX17845, just as @EV_Builder found on the Kona boards. Seem like Kia Niro and Hyundai Kona share the same BMS boards.

EDIT:
I have one board on my workbench and I will try to find the pinout and also see if I can communicate with the MAX17845.
User avatar
EV_Builder
Posts: 954
Joined: Tue Apr 28, 2020 3:50 pm
Location: The Netherlands
Contact:

Re: Kia Niro BMS

Post by EV_Builder »

Ok , i have the "double" models but I picked up a 20S and a 19S pack. So will test when time allows.

Don't see any problems as of yet.
Converting an Porsche Panamera
see http://www.wdrautomatisering.nl for bespoke modules.
User avatar
bexander
Posts: 588
Joined: Tue Jun 16, 2020 6:00 pm
Location: Gothenburg, Sweden

Re: Kia Niro BMS

Post by bexander »

Did some reverse tracing and measurement today.
Looking at the connector as shown in below picture.
IMG_2068_scale.jpg
The pinout as I could trace it.
IMG_1922_scale.jpg
Very similar to the Kia Niro PHEV modules that is described in the start of this thread.

Also, when viewing from the bottom side, the chip closest to the connector is the lower voltage chip. Everything seem to be mounted so the boards should be possible to use up to 12S on each chip, 24S in total per pcb.

Each chip can handle 2 temp sensors per piece but usually only one temp sensor is connector and the used postion in the connector varies.
There is a kind of loop going on with pin column 3 and 4. I never figured out how to use this for the PHEV modules but looks very similar for the e-Niro as well.

Regarding cell connections, where it says "tom" in my notes, it's swedish for blank/empty. The most left blank pin (under left 10+) should be 11+ and the right 10+ is the 12+ or highest cell pin used (if only 9S is used it would need to connect to 9+). Hence 10+ in this case as only 10S is used.

Have done a setup, only needs code tweaking, to test communication with the chips. Will report back when tested.
User avatar
EV_Builder
Posts: 954
Joined: Tue Apr 28, 2020 3:50 pm
Location: The Netherlands
Contact:

Re: Kia Niro BMS

Post by EV_Builder »

Wow! That's quick! Top job, txs for sharing.

EDIT: When i can i check the connections with the real 10S and 9S packs (20S and 19S). At the moment a bit of between house moving etc.
Converting an Porsche Panamera
see http://www.wdrautomatisering.nl for bespoke modules.
User avatar
bexander
Posts: 588
Joined: Tue Jun 16, 2020 6:00 pm
Location: Gothenburg, Sweden

Re: Kia Niro BMS

Post by bexander »

I've checked on a 20S module from the e-Niro pack. The 19S module has one less cable.

I'm able to communicate with the slave module and read out the cell voltages, die temperature as well as external temperature sensor, all while using the same hardware as mentioned in the start of this thread so I call this a big win!

@EV_Builder: Thank you for pointing out that the Kona slaves use this chip. The board I looked at first was hard to read the chip marking on and I did not find that marking and I then assumed it was a Kia/Hyundai specific chip.
User avatar
EV_Builder
Posts: 954
Joined: Tue Apr 28, 2020 3:50 pm
Location: The Netherlands
Contact:

Re: Kia Niro BMS

Post by EV_Builder »

I will join that party soon I hope...
Converting an Porsche Panamera
see http://www.wdrautomatisering.nl for bespoke modules.
ferencvarga46
Posts: 1
Joined: Thu Sep 29, 2022 8:13 pm

Re: Kia Niro BMS

Post by ferencvarga46 »

Hi!
If it help, I could make more reverse about the Kona board!
Post Reply