openinverter forum

Kutato72 wrote: ↑Tue Nov 22, 2022 8:07 pm The cell terminals are protected by SMD fuses with the letter "N". In principle, this means 2.0A. I tried it for your pleasure with 2.2A, it didn't melt in 10 seconds. So 2.0A is correct.

Thanks. But that does not explain why one fuse blew on 0.2A. I lost connection to that particular cell.
Was it already damaged possibly?

Anyone knows KIA battery NTC temp sensors coefficient? I am researching one here and i really dont want to reinvent the wheel.
Propose data goes to Wiki.

The official Kona service manual specifications include a table of resistances for the pack temperature sensors. I only copied down some of those values:
The Kia Niro battery specs looks the same, but I don't know if they're the same sensor? I also haven't verified against a Kona pack, yet - would prefer to wait until someone's confirmed it before it goes to the wiki, but feel free to pop it there now otherwise.

Thanks for your replys on my issue. I do have the original BMS from KIA but I found it was only monitoring and not managing the cell voltages. I need to check my electrical connections.

Arber333 - are you suggesting to simply remove the damaged cell(s) and run on less cells?

canadasconvert wrote: ↑Mon Jan 02, 2023 4:38 am.

Arber333 - are you suggesting to simply remove the damaged cell(s) and run on less cells?

Sure why not? It is the cheapest way to still drive the car. As long as you have a BMS to stop charging at 4.1V per cell you should be good. Inverter and dcdc dont care.
You would have to adjust charger max cv voltage for your new cell count...

arber333 wrote: ↑Thu Dec 01, 2022 11:59 am Thanks. But that does not explain why one fuse blew on 0.2A. I lost connection to that particular cell.
Was it already damaged possibly?

Did you ever get to the bottom of this? I have a battery that I believe has several down fuses on the balance lines.

Cheers

Kutato72 wrote: ↑Tue Nov 22, 2022 8:07 pm The cell terminals are protected by SMD fuses with the letter "N". In principle, this means 2.0A. I tried it for your pleasure with 2.2A, it didn't melt in 10 seconds. So 2.0A is correct.

Sorry for reviving an old thread, but do you remember if each of the balance lines are individually fused?

Many Thanks

Sh0tgun98 wrote: ↑Sat Jun 22, 2024 8:21 pm Sorry for reviving an old thread, but do you remember if each of the balance lines are individually fused?

Many Thanks

Yes there are 2x tracks going to fuse links from the last positive contact. I tried to revive that fuse but i only managed to burn traces. In the end i rather cut the sides and rewired my own lines to JK BMS.

arber333 wrote: ↑Sun Jun 23, 2024 1:44 pm Yes there are 2x tracks going to fuse links from the last positive contact. I tried to revive that fuse but i only managed to burn traces. In the end i rather cut the sides and rewired my own lines to JK BMS.

Did you dissassemble the packs or just cut through the side of the pastic casing?

Sh0tgun98 wrote: ↑Mon Jun 24, 2024 8:46 pm Did you dissassemble the packs or just cut through the side of the pastic casing?

I am sorry i was talking about ID3 cell blocks. The thing about Kia cells is you can simply access cell contacts at the sides and dont bother with any tracks if you burned the fuses.
I did dissassemble the bolts that hold cells together and the block expanded c onsiderably. You need to squeeze it back together after surgery...

arber333 wrote: ↑Mon Jun 24, 2024 9:19 pm I am sorry i was talking about ID3 cell blocks. The thing about Kia cells is you can simply access cell contacts at the sides and dont bother with any tracks if you burned the fuses.
I did dissassemble the bolts that hold cells together and the block expanded c onsiderably. You need to squeeze it back together after surgery...

Roger. I have a hyundai kona battery. I think there may be some bad fuses on the circuit boards. They don't look like they are under the same sort of compression as the kia cells. Does anyone have any experience disassembling and reassembling the hyundai cell packs?

m.art.y wrote: ↑Thu Dec 01, 2022 11:36 am Hi, anybody using 39 kwh Hyundai battery pack? It says Li-ion Polymer on it. Is it a normal Li-ion spec? Can a BMS be reused?

Hi. Were you able to reuse the BMS? I like to do the same and get the data out of it via CAN and use it for my gridconverter.

m.art.y wrote: ↑Thu Dec 01, 2022 11:36 am Hi, anybody using 39 kwh Hyundai battery pack? It says Li-ion Polymer on it. Is it a normal Li-ion spec? Can a BMS be reused?

Do you have more info about this?

Dreetje wrote: ↑Thu Aug 29, 2024 8:50 am Hi. Were you able to reuse the BMS? I like to do the same and get the data out of it via CAN and use it for my gridconverter.

I've gone with a different battery in the end but yes the BMS is reusable, there is info on the forum somewhere.