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by coulomb
Fri Oct 09, 2020 6:24 am
Forum: Batteries and Battery Management
Topic: Troubleshooting and repair for On-board Charger (OBC)
Replies: 620
Views: 239291

Re: Troubleshooting and repair for On-board Charger (OBC), DC-DC Converter

Some capacitors can make faint crackling noises. The 2.2 μF 275 VAC gray film capacitors in Elcon charrgers used to do this. Replacing them with new blue versions (the color may correlate with the manufacturer) solves that problem. Of course, it could also be something breaking down due to moisture ...
by coulomb
Mon Oct 05, 2020 10:48 pm
Forum: Batteries and Battery Management
Topic: No READY. P1A15 error. Condenser charge timeout.
Replies: 106
Views: 40609

Re: No READY. P1A15 error. Condenser charge timeout.

There might be a problem with the CMUs as well, since the min and max cell voltages are reporting 0.39 V. But the total pack voltage seems fine (average of 4.063 VPC). I don't know if this is related to your main issue.
by coulomb
Tue Sep 29, 2020 3:51 pm
Forum: Batteries and Battery Management
Topic: Reversed leads to the HV pack (Solved)
Replies: 2
Views: 640

Re: Reversed leads to the HV pack (Solved)

if you switch polarity on main battery the precharge resistor is gonna blow . With the massive advantage of hindsight, that makes sense. The motor controller full bridge looks like two very large diodes in series to a reversed battery. If the battery was connected directly across those diodes, they...
by coulomb
Sat Sep 19, 2020 3:24 am
Forum: Batteries and Battery Management
Topic: No READY. P1A15 error. Condenser charge timeout.
Replies: 106
Views: 40609

Re: No READY. P1A15 error. Condenser charge timeout.

on a German forum, I found some interesting information... There is somewhere near the condenser a component that measures the current, wich with time weakens, and puts the car in fail mode. I'm quite interested in iMiEV current sensors at the moment. Can you post a link to that comment? Or at leas...
by coulomb
Fri Sep 18, 2020 6:17 pm
Forum: Batteries and Battery Management
Topic: How to charge a 4 cell module out of the car
Replies: 14
Views: 1983

Re: How to charge a 4 cell module out of the car

Took all morning to get from 4.06V to 4.15V. It's delivering 1.5A. So I think that's the ticket. I'll bring it up to 16V... Are you switching between volts per cell and total volts? Because if the 4-cell module total was at 4.06 V, then you have at least 3 ruined cells. My guess is three cells at 0...
by coulomb
Thu Sep 17, 2020 8:33 am
Forum: Batteries and Battery Management
Topic: Battery leakage detector (presumed)
Replies: 6
Views: 919

Re: Battery leakage detector (presumed)

I believe that connector C-21, which connects to the battery leakage detector, is different between some models of iMiEV. C-21 looks the same in all the schematics that I've found (2011, 2012, and 2013), so I don't know any details. I wonder what might change that would require a different connector.
by coulomb
Wed Sep 16, 2020 5:01 pm
Forum: Batteries and Battery Management
Topic: Battery leakage detector (presumed)
Replies: 6
Views: 919

Re: Battery leakage detector (presumed)

kiev wrote:i can't find anything on the "LTTH" chip;

It seems to be a true RMS to DC converter. Why they want this I don't know. This definitely seems overkill to me.

Datasheet: https://datasheetspdf.com/pdf/635832/Li ... /LTC1966/1
by coulomb
Wed Sep 16, 2020 4:50 pm
Forum: Batteries and Battery Management
Topic: Battery leakage detector (presumed)
Replies: 6
Views: 919

Re: Battery leakage detector (presumed)

kiev wrote: Is there anything of interest on the back side?

No, no components, and only a handful of tracks.
by coulomb
Tue Sep 15, 2020 7:02 pm
Forum: Batteries and Battery Management
Topic: The aftermarket cell replacement saga
Replies: 30
Views: 13386

Re: The aftermarket cell replacement saga

I found this article which brings some information about the current sensor in the Miev: Battery Management System Hardware Concepts: An Overview by Markus Lelie, Thomas Braun, Marcus Knips, Hannes Nordmann, Florian Ringbeck, Hendrik Zappen and Dirk Uwe Sauer Appl. Sci. 2018, 8, 534; doi:10.3390/ap...
by coulomb
Mon Sep 14, 2020 3:17 pm
Forum: Batteries and Battery Management
Topic: Battery current sensor
Replies: 14
Views: 1875

Re: Battery current sensor

Thanks, Kenny. The can triplet database confirms, but doesn't seem to have the data format. It should be fairly easy to guess given some data. I might even be able to figure it out from some of the published massive CAN data dumps. [ Edit: this post seems to say that it's the first data byte, so the...

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