Discussion about components from Ampera/Bolt and the PSA group which owns Opel these days
bobbyj_408
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by bobbyj_408 » Sun Mar 28, 2021 10:37 pm
Hi All,
I believe I got the SimpBMS software running on a Teensy 3.2, so I plugged it into my gen 1 Chevy Volt battery to read the cell voltages and I got the following (shown below). Now, the pack voltage from SimpBMS is 279.5 V, but I measured the voltage with a multimeter myself to be at around 339 V. There does seem to be an error readout from SimpBMS that says "!!! Series Cells Fault !!!", but how can I diagnose this? What do I need to do to fix this?
Thanks!
Code: Select all
BMS Status : 1 Ready 80
Out:0000 Cont:0000 In:0000
Modules: 11 Cells: 80 Strings: 1 Voltage: 279.559V Avg Cell Voltage: 3.499V Low Cell Voltage: 3.056V High Cell Voltage: 3.543V Delta Voltage: 486mV Avg Temp: 13.066C
Module #1 21.24V Cell-1: 3.54V Cell-2: 3.54V Cell-3: 3.54V Cell-4: 3.54V Cell-5: 3.54V Cell-6: 3.54V
Temp 1: 9.09
Module #2 28.33V Cell-7: 3.54V Cell-8: 3.54V Cell-9: 3.54V Cell-10: 3.54V Cell-11: 3.54V Cell-12: 3.54V Cell-13: 3.54V Cell-14: 3.54V
Temp 1: 11.72
Module #3 28.31V Cell-15: 3.54V Cell-16: 3.54V Cell-17: 3.54V Cell-18: 3.54V Cell-19: 3.54V Cell-20: 3.54V Cell-21: 3.54V Cell-22: 3.54V
Temp 1: 10.52
Module #4 28.33V Cell-23: 3.54V Cell-24: 3.54V Cell-25: 3.54V Cell-26: 3.54V Cell-27: 3.54V Cell-28: 3.54V Cell-29: 3.54V Cell-30: 3.54V
Temp 1: 17.19
Module #6 24.72V Cell-31: 3.06V Cell-32: 3.09V Cell-33: 3.09V Cell-34: 3.08V Cell-35: 3.10V Cell-36: 3.12V Cell-37: 3.09V Cell-38: 3.11V
Temp 1: 11.49
Module #9 28.29V Cell-39: 3.53V Cell-40: 3.53V Cell-41: 3.54V Cell-42: 3.54V Cell-43: 3.54V Cell-44: 3.54V Cell-45: 3.54V Cell-46: 3.54V
Temp 1: 11.07
Module #10 28.30V Cell-47: 3.54V Cell-48: 3.54V Cell-49: 3.54V Cell-50: 3.54V Cell-51: 3.54V Cell-52: 3.54V Cell-53: 3.54V Cell-54: 3.54V
Temp 1: 10.16
Module #11 28.32V Cell-55: 3.54V Cell-56: 3.54V Cell-57: 3.54V Cell-58: 3.54V Cell-59: 3.54V Cell-60: 3.54V Cell-61: 3.54V Cell-62: 3.54V
Temp 1: 16.97
Module #13 21.23V Cell-63: 3.54V Cell-64: 3.54V Cell-65: 3.54V Cell-66: 3.54V Cell-67: 3.54V Cell-68: 3.54V
Temp 1: 11.46
Module #14 21.23V Cell-69: 3.54V Cell-70: 3.54V Cell-71: 3.54V Cell-72: 3.54V Cell-73: 3.54V Cell-74: 3.54V
Temp 1: 17.22
Module #15 21.24V Cell-75: 3.54V Cell-76: 3.54V Cell-77: 3.54V Cell-78: 3.54V Cell-79: 3.54V Cell-80: 3.54V
Temp 1: 16.84
CANbus 0.00mA 42% SOC 42000.00mAh
-----------------------------------
!!! Series Cells Fault !!!
tom91
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by tom91 » Sun Mar 28, 2021 10:54 pm
As you can see from the read out it shows only 80 cells instead of 96, so issues with the cabus slaves. To get series cells fault to be removed you need to input the right series cell settings.
bobbyj_408
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by bobbyj_408 » Sun Mar 28, 2021 11:00 pm
Wow, thanks for the quick response. So it's possible that this is a configuration problem? That would be great. How do I set it to check 96?
tom91
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by tom91 » Sun Mar 28, 2021 11:55 pm
The displayed read out shows all the found Slaves, it would seem to me one of the slaves is not reading properly.
How have you wired it up? Did you retain the OEM loom?
bobbyj_408
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by bobbyj_408 » Mon Mar 29, 2021 12:27 am
Dang... I was worried about that. I noticed that one of the slaves has a dirt ring on it as if some water was on there at some point... I'm worried that I may have gotten damaged while it was sitting at the junk yard. Is there a way where I can individually check each BMS? Something like compare the battery section voltage with the voltage reported from the individual BMS slave?
Yup, OEM loom connected as specified in the SimpBMS manual.
tom91
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by tom91 » Mon Mar 29, 2021 8:19 am
I would say unplug each slave on the LV side one by one to identify the reported modules.
You need to find the one reporting module 6 as 5 7 8 are missing.
bobbyj_408
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by bobbyj_408 » Tue Mar 30, 2021 2:00 am
tom91 wrote: ↑ Mon Mar 29, 2021 8:19 am
I would say unplug each slave on the LV side one by one to identify the reported modules.
You need to find the one reporting module 6 as 5 7 8 are missing.
Thanks Tom.
Did this and had some strange results. Still not quite sure which one would be defective...
Per the attached image, when I disconnected pack 1, I got the following
Code: Select all
BMS Status : 1 Ready 0
Out:0000 Cont:0000 In:0000
Modules: 0 Cells: 0 Strings: 1 Voltage: 0.000V Avg Cell Voltage: nanV Low Cell Voltage: 5.000V High Cell Voltage: 0.000V Delta Voltage: -5000mV Avg Temp: nanC
CANbus 0.00mA 0% SOC -240000.00mAh
-----------------------------------
pack 2
Code: Select all
BMS Status : 1 Ready 30
Out:0000 Cont:0000 In:0000
Modules: 4 Cells: 30 Strings: 1 Voltage: 106.226V Avg Cell Voltage: 3.541V Low Cell Voltage: 3.536V High Cell Voltage: 3.544V Delta Voltage: 7mV Avg Temp: 14.114C
Module #1 21.25V Cell-1: 3.54V Cell-2: 3.54V Cell-3: 3.54V Cell-4: 3.54V Cell-5: 3.54V Cell-6: 3.54V
Temp 1: 15.51
Module #2 28.34V Cell-7: 3.54V Cell-8: 3.54V Cell-9: 3.54V Cell-10: 3.54V Cell-11: 3.54V Cell-12: 3.54V Cell-13: 3.54V Cell-14: 3.54V
Temp 1: 12.07
Module #3 28.33V Cell-15: 3.54V Cell-16: 3.54V Cell-17: 3.54V Cell-18: 3.54V Cell-19: 3.54V Cell-20: 3.54V Cell-21: 3.54V Cell-22: 3.54V
Temp 1: 11.68
Module #4 28.31V Cell-23: 3.54V Cell-24: 3.54V Cell-25: 3.54V Cell-26: 3.54V Cell-27: 3.54V Cell-28: 3.54V Cell-29: 3.54V Cell-30: 3.54V
Temp 1: 17.19
CANbus 0.00mA 45% SOC 45000.00mAh
-----------------------------------
!!! Series Cells Fault !!!
pack 3
Code: Select all
BMS Status : 1 Ready 0
Out:0000 Cont:0000 In:0000
Modules: 0 Cells: 0 Strings: 1 Voltage: 185.462V Avg Cell Voltage: infV Low Cell Voltage: 0.004V High Cell Voltage: 3.545V Delta Voltage: 3541mV Avg Temp: 14.216C
Module #1 15.48V Cell-1: 3.06V Cell-2: 3.09V Cell-3: 3.10V Cell-4: 0.00V Cell-5: 3.11V Cell-6: 3.12V
Temp 1: 15.44
Module #2 28.34V Cell-7: 3.54V Cell-8: 3.54V Cell-9: 3.54V Cell-10: 3.54V Cell-11: 3.54V Cell-12: 3.54V Cell-13: 3.54V Cell-14: 3.54V
Temp 1: 12.14
Module #3 28.33V Cell-15: 3.54V Cell-16: 3.54V Cell-17: 3.54V Cell-18: 3.54V Cell-19: 3.54V Cell-20: 3.54V Cell-21: 3.54V Cell-22: 3.54V
Temp 1: 11.72
Module #4 28.33V Cell-23: 3.54V Cell-24: 3.54V Cell-25: 3.54V Cell-26: 3.54V Cell-27: 3.54V Cell-28: 3.54V Cell-29: 3.54V Cell-30: 3.54V
Temp 1: 17.19
Module #9 28.31V Cell-31: 3.54V Cell-32: 3.54V Cell-33: 3.54V Cell-34: 3.54V Cell-35: 3.54V Cell-36: 3.54V Cell-37: 3.54V Cell-38: 3.54V
Temp 1: 13.73
Module #10 28.33V Cell-39: 3.54V Cell-40: 3.54V Cell-41: 3.54V Cell-42: 3.54V Cell-43: 3.54V Cell-44: 3.54V Cell-45: 3.54V Cell-46: 3.54V
Temp 1: 12.33
Module #11 28.34V Cell-47: 3.54V Cell-48: 3.54V Cell-49: 3.54V Cell-50: 3.54V Cell-51: 3.54V Cell-52: 3.54V Cell-53: 3.54V Cell-54: 3.54V
Temp 1: 16.97
CANbus 0.00mA 0% SOC 0.00mAh
pack 4
Code: Select all
BMS Status : 1 Ready 38
Out:0000 Cont:0000 In:0000
Modules: 5 Cells: 38 Strings: 1 Voltage: 131.006V Avg Cell Voltage: 3.452V Low Cell Voltage: 3.060V High Cell Voltage: 3.544V Delta Voltage: 484mV Avg Temp: 14.050C
Module #1 21.25V Cell-1: 3.54V Cell-2: 3.54V Cell-3: 3.54V Cell-4: 3.54V Cell-5: 3.54V Cell-6: 3.54V
Temp 1: 15.70
Module #2 28.34V Cell-7: 3.54V Cell-8: 3.54V Cell-9: 3.54V Cell-10: 3.54V Cell-11: 3.54V Cell-12: 3.54V Cell-13: 3.54V Cell-14: 3.54V
Temp 1: 12.40
Module #3 28.33V Cell-15: 3.54V Cell-16: 3.54V Cell-17: 3.54V Cell-18: 3.54V Cell-19: 3.54V Cell-20: 3.54V Cell-21: 3.54V Cell-22: 3.54V
Temp 1: 11.94
Module #4 28.34V Cell-23: 3.54V Cell-24: 3.54V Cell-25: 3.54V Cell-26: 3.54V Cell-27: 3.54V Cell-28: 3.54V Cell-29: 3.54V Cell-30: 3.54V
Temp 1: 17.19
Module #6 24.76V Cell-31: 3.06V Cell-32: 3.09V Cell-33: 3.10V Cell-34: 3.08V Cell-35: 3.11V Cell-36: 3.12V Cell-37: 3.09V Cell-38: 3.11V
Temp 1: 13.01
CANbus 0.00mA 38% SOC 38000.00mAh
-----------------------------------
!!! Series Cells Fault !!!
Attachments
tom91
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by tom91 » Tue Mar 30, 2021 8:12 am
Pack 3 as it only shows 8 cells but the module is monitoring more.
bobbyj_408
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by bobbyj_408 » Tue Mar 30, 2021 4:41 pm
tom91 wrote: ↑ Tue Mar 30, 2021 8:12 am
Pack 3 as it only shows 8 cells but the module is monitoring more.
Nice! Now the question is how to fix it? I suppose I could try finding a bms slave somewhere? I found one on ebay, but its part number is 22911432 and mine is 22880273. I highly doubt it's a good idea to mix and match like that...
I suspect opening up that BMS to see if anything is obviously broken is also a lost cause.
tom91
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by tom91 » Tue Mar 30, 2021 5:02 pm
Mind doing the following, unplug the HV sense wires one at a time till you find one that causes no change.
bobbyj_408
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by bobbyj_408 » Sun Apr 04, 2021 10:44 pm
tom91 wrote: ↑ Tue Mar 30, 2021 5:02 pm
Mind doing the following, unplug the HV sense wires one at a time till you find one that causes no change.
Thanks Tom. I did this, and although there wasn't a connection that had no change, pack 2 did drop out module 6, which is the one we were looking for. I pulled out that bms, opened it up, and, well, I think the attachment speaks for itself. Note that this is the one that I mentioned that had the water stain on it.
Anyone out there have a replacement?
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jon volk
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by jon volk » Mon Apr 05, 2021 4:49 pm
I had to replace 2 slave modules with similar corrosion. One of these days I plan on potting a set.
Formerly 92 E30 BMW Cabrio with Tesla power
johu
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by johu » Mon Apr 05, 2021 5:19 pm
Seen that a lot in BMS context. I left one test system in the shed and there was a bit of water ingress. Looked similar. Water + high voltage + PCB.
bobbyj_408
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by bobbyj_408 » Mon Apr 05, 2021 6:19 pm
jon volk wrote: ↑ Mon Apr 05, 2021 4:49 pm
I had to replace 2 slave modules with similar corrosion. One of these days I plan on potting a set.
Oh man.. Where were you able to locate one of these? I assume they would be difficult to track down.
bobbyj_408
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by bobbyj_408 » Mon Apr 05, 2021 6:19 pm
johu wrote: ↑ Mon Apr 05, 2021 5:19 pm
Seen that a lot in BMS context. I left one test system in the shed and there was a bit of water ingress. Looked similar. Water + high voltage + PCB.
Yeah... Looks like that's what happened here. Bummer.
jon volk
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by jon volk » Mon Apr 05, 2021 11:01 pm
bobbyj_408 wrote: ↑ Mon Apr 05, 2021 6:19 pm
jon volk wrote: ↑ Mon Apr 05, 2021 4:49 pm
I had to replace 2 slave modules with similar corrosion. One of these days I plan on potting a set.
Oh man.. Where were you able to locate one of these? I assume they would be difficult to track down.
They pop up on eBay all the time. Got a full set for $30.
Formerly 92 E30 BMW Cabrio with Tesla power
bobbyj_408
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by bobbyj_408 » Tue Apr 06, 2021 12:23 am
jon volk wrote: ↑ Mon Apr 05, 2021 11:01 pm
They pop up on eBay all the time. Got a full set for $30.
Oh nice! Ok, I'll keep an eye out for that. I found a set that has 3 of the 4 boards available, but they have a different part number of 22911432, and mine is 22880273. I assume it wouldn't be a great idea to mix and match, right?
bobbyj_408
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by bobbyj_408 » Tue Apr 06, 2021 1:48 am
Actually, the seller did have all four of the 2291 part numbers. Should I just go for it?
bobbyj_408
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by bobbyj_408 » Sat Apr 17, 2021 10:55 pm
For those keeping tabs, I managed to find the BMS modules listed on Ebay. I got them in, installed them, and things look good! Reads all 96 cells, and output the same voltage that I read with a multimeter. The only thing is that the print out skips module 8, which I am guessing is why it says "series faul"? Any advice?
Code: Select all
BMS Status : 1 Ready 96
Out:0000 Cont:0000 In:0000
Modules: 13 Cells: 96 Strings: 1 Voltage: 336.352V Avg Cell Voltage: 3.507V Low Cell Voltage: 3.076V High Cell Voltage: 3.546V Delta Voltage: 470mV Avg Temp: 13.890C
Module #1 21.23V Cell-1: 3.54V Cell-2: 3.54V Cell-3: 3.54V Cell-4: 3.54V Cell-5: 3.54V Cell-6: 3.54V
Temp 1: 9.32
Module #2 28.30V Cell-7: 3.54V Cell-8: 3.54V Cell-9: 3.54V Cell-10: 3.54V Cell-11: 3.54V Cell-12: 3.54V Cell-13: 3.54V Cell-14: 3.53V
Temp 1: 12.46
Module #3 28.33V Cell-15: 3.54V Cell-16: 3.54V Cell-17: 3.54V Cell-18: 3.54V Cell-19: 3.54V Cell-20: 3.54V Cell-21: 3.54V Cell-22: 3.54V
Temp 1: 12.56
Module #4 28.29V Cell-23: 3.53V Cell-24: 3.54V Cell-25: 3.54V Cell-26: 3.54V Cell-27: 3.54V Cell-28: 3.53V Cell-29: 3.54V Cell-30: 3.54V
Temp 1: 17.19
Module #5 28.32V Cell-31: 3.54V Cell-32: 3.54V Cell-33: 3.54V Cell-34: 3.54V Cell-35: 3.54V Cell-36: 3.54V Cell-37: 3.54V Cell-38: 3.54V
Temp 1: 10.49
Module #6 24.83V Cell-39: 3.08V Cell-40: 3.10V Cell-41: 3.11V Cell-42: 3.09V Cell-43: 3.12V Cell-44: 3.13V Cell-45: 3.10V Cell-46: 3.12V
Temp 1: 13.79
Module #7 28.29V Cell-47: 3.54V Cell-48: 3.54V Cell-49: 3.53V Cell-50: 3.54V Cell-51: 3.54V Cell-52: 3.53V Cell-53: 3.54V Cell-54: 3.54V
Temp 1: 17.10
Module #9 28.32V Cell-55: 3.54V Cell-56: 3.54V Cell-57: 3.54V Cell-58: 3.54V Cell-59: 3.54V Cell-60: 3.54V Cell-61: 3.54V Cell-62: 3.54V
Temp 1: 16.74
Module #10 28.34V Cell-63: 3.54V Cell-64: 3.54V Cell-65: 3.54V Cell-66: 3.54V Cell-67: 3.54V Cell-68: 3.54V Cell-69: 3.54V Cell-70: 3.54V
Temp 1: 12.20
Module #11 28.33V Cell-71: 3.54V Cell-72: 3.54V Cell-73: 3.54V Cell-74: 3.54V Cell-75: 3.54V Cell-76: 3.54V Cell-77: 3.54V Cell-78: 3.55V
Temp 1: 16.97
Module #13 21.23V Cell-79: 3.54V Cell-80: 3.54V Cell-81: 3.54V Cell-82: 3.54V Cell-83: 3.54V Cell-84: 3.54V
Temp 1: 13.30
Module #14 21.27V Cell-85: 3.55V Cell-86: 3.54V Cell-87: 3.55V Cell-88: 3.55V Cell-89: 3.54V Cell-90: 3.54V
Temp 1: 11.65
Module #15 21.26V Cell-91: 3.54V Cell-92: 3.54V Cell-93: 3.54V Cell-94: 3.54V Cell-95: 3.54V Cell-96: 3.55V
Temp 1: 16.80
CANbus 0.00mA 0% SOC -240000.00mAh
-----------------------------------
!!! Series Cells Fault !!!
tom91
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by tom91 » Sun Apr 18, 2021 12:10 pm
Check your settings in the battery settings, is it set to 96 cells in series and 1 parallel string?
bobbyj_408
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by bobbyj_408 » Sun Apr 18, 2021 10:06 pm
tom91 wrote: ↑ Sun Apr 18, 2021 12:10 pm
Check your settings in the battery settings, is it set to 96 cells in series and 1 parallel string?
Ahh, looks like it wasn't! Below is what I have. I'll update this and let you know how it goes.
Code: Select all
settings.Pstrings = 1; // strings in parallel used to divide voltage of pack
settings.Scells = 12;//Cells in series
dimonlipko
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by dimonlipko » Mon May 02, 2022 8:35 pm
Someone check, is temp sensor measure true? I have big diference by temp in one battery. I think, Simp have problem in code for mach temp.