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800V Hyundai Ioniq 5 Battery
Posted: Thu Feb 03, 2022 9:29 pm
by Kelju
Interesting read and a quite good video:
https://insideevs-com.cdn.ampproject.or ... pened/amp/
Does anybody have further details on the BMS on this battery?
Are there slave units in the modules and if so, what ASICs might there be?
Re: 800V Hyundai Ioniq 5 Battery
Posted: Sun Feb 06, 2022 11:43 am
by deeamon
I have 77,4kWh battery from kia ev6/ioniq 5. I'll check bms later and let you know.
Re: 800V Hyundai Ioniq 5 Battery
Posted: Wed Mar 09, 2022 2:30 am
by jon volk
Whats the voltage and weight per module?
Re: 800V Hyundai Ioniq 5 Battery
Posted: Sat Mar 12, 2022 8:24 pm
by Kutato72
I haven't seen it yet, but I'm guessing:
- 6S2P bonded cells
- Cell connections at both ends
- One piece of BMU with part number 375A0-xxxx with MAX17841 based isoSPI bus
- 8 CMUs with part number 375A1-xxxx, each with 2-2 MAX17845 chips
- One MAX17845 chip handles 2 modules (12 cells), one CMU can handle 4 modules, so 8 CMUs can handle 32 modules.
What did I win?
Re: 800V Hyundai Ioniq 5 Battery
Posted: Sun Mar 13, 2022 7:23 pm
by Domt177
- With connecting wing
Width: 428mm, Depth: 158mm, Height: 109mm
- Connection wing not included
Width: 380mm, Depth: 136.5mm, Height: 109mm
Weight: 10.85kg
Re: 800V Hyundai Ioniq 5 Battery
Posted: Mon Mar 14, 2022 1:24 am
by jon volk
I wonder what the output capability of these are. If I could get to 400v with 16 modules, that would get me to 38kwh and at 10.85 kg each, that would amount to a pretty good weight savings over my 32kwh 2x Volt packs. By the above dimensions, it seems I could get all 16 under the hood up front.
Re: 800V Hyundai Ioniq 5 Battery
Posted: Mon Mar 14, 2022 8:12 am
by FJ3422
Watch out a bit with the modern cell chemistries. I don't know if these are already NCM811, but thermal stability of low-cobalt cells is way less then your current rock-solid LGX-P1/P1.5 NCM111/NCM333 cells. The core-cell-temperature at which decomposition starts is way lower on the low-cobalt chemistries. When they are new and have a very low internal resistance they may keep up, but when aging comes in and the internal resistance rises, the chance of a thermal runaway increases when torturing them with 1000 Amps.
I have not found any high-energy dense NCM811 modules yet that can safely delivery 500+ Amps. Bought some NCM811 MB EQA modules for the E30 project, but sold them again and got back to the NCM622 modules.
Re: 800V Hyundai Ioniq 5 Battery
Posted: Mon Mar 14, 2022 8:53 am
by arber333
FJ3422 wrote: ↑Mon Mar 14, 2022 8:12 am
Watch out a bit with the modern cell chemistries. I don't know if these are already NCM811, but thermal stability of low-cobalt cells is way less then your current rock-solid LGX-P1/P1.5 NCM111/NCM333 cells. The core-cell-temperature at which decomposition starts is way lower on the low-cobalt chemistries. When they are new and have a very low internal resistance they may keep up, but when aging comes in and the internal resistance rises, the chance of a thermal runaway increases when torturing them with 1000 Amps.
I have not found any high-energy dense NCM811 modules yet that can safely delivery 500+ Amps. Bought some NCM811 MB EQA modules for the E30 project, but sold them again and got back to the NCM622 modules.
True! I have found out that those 56Ah and 60Ah cells really need to limit upper and lower quadrant of voltage. From 3.0V to 4.0V. Anything over those
edges causes much heat generation and premature wear on the cell.
Re: 800V Hyundai Ioniq 5 Battery
Posted: Mon Mar 14, 2022 1:29 pm
by jon volk
Interesting and somewhat disappointing. I would have hoped to see more higher output and lighter options as the years wear on but it seems these 10 year old cells still rank pretty high in function and robustness compared to other mass produced options.
Re: 800V Hyundai Ioniq 5 Battery
Posted: Mon Mar 14, 2022 2:09 pm
by SuperV8
jon volk wrote: ↑Mon Mar 14, 2022 1:29 pm
Interesting and somewhat disappointing. I would have hoped to see more higher output and lighter options as the years wear on but it seems these 10 year old cells still rank pretty high in function and robustness compared to other mass produced options.
Seems power density and energy density are both opposing battery qualities? You can pick either but not both!
Re: 800V Hyundai Ioniq 5 Battery
Posted: Sat Sep 09, 2023 2:07 pm
by cgalpin
I have the opportunity to get some of these packs. Are you saying they are not good for a conversion unless using the full 800V configuration? Or using 32 reconfigured is fine?
Re: 800V Hyundai Ioniq 5 Battery
Posted: Mon Nov 20, 2023 4:14 pm
by MarekN
deeamon wrote: ↑Sun Feb 06, 2022 11:43 am
I have 77,4kWh battery from kia ev6/ioniq 5. I'll check bms later and let you know.
Have you been able to check the BMS? If so, could you please share your findings?
Re: 800V Hyundai Ioniq 5 Battery
Posted: Wed Feb 07, 2024 3:46 pm
by m.art.y
FJ3422 wrote: ↑Mon Mar 14, 2022 8:12 am
current rock-solid LGX-P1/P1.5 NCM111/NCM333 cells.
Hi, to your knowledge which battery packs use those and the NCM622?
Re: 800V Hyundai Ioniq 5 Battery
Posted: Wed Feb 07, 2024 5:00 pm
by Jacobsmess
m.art.y wrote: ↑Wed Feb 07, 2024 3:46 pm
Hi, to your knowledge which battery packs use those and the NCM622?
Panasonic prismatic ncm622 are used in the Lexus UX300E and other Toyota EVs but there aren't many abouts
Re: 800V Hyundai Ioniq 5 Battery
Posted: Sun Apr 14, 2024 11:09 am
by mane2
I'm also pondering about buying 16x EV6 modules and having 400V pack. Any ideas how many amps those can push out?
Bad thermal stability .. so cooling is a must, I guess? I'm currently happily running Model S modules without cooling and they don't get hot at all.