Go to advanced search

by coulomb
Sat Sep 19, 2020 3:24 am
Forum: Batteries and Battery Management
Topic: No READY. P1A15 error. Condenser charge timeout.
Replies: 91
Views: 32334

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: 738

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: 347

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: 347

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: 347

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: 10710

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: 676

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...
by coulomb
Mon Sep 14, 2020 8:02 am
Forum: Batteries and Battery Management
Topic: Battery current sensor
Replies: 14
Views: 676

Re: Battery current sensor

I've been asked to look into this for a company that has done this already, and sees demand for many more if it can be solved. They are using NMC cells, which have a lower voltage characteristic, so the BMS learns a lower capacity that is actually present. Also, these are 93 Ah cells, and I read som...
by coulomb
Mon Sep 14, 2020 2:28 am
Forum: Batteries and Battery Management
Topic: Troubleshooting and repair for On-board Charger (OBC), DC-DC Converter
Replies: 603
Views: 198669

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

Interesting linear slope of the FB signal rising while waiting for something to happen. Looks like the op-amp is open drain with a current source as the pull-up. Constant current into a capacitor gives constant dV/dt. That gives some hope that pulling pin 2 low is at least anticipated, if not desig...
by coulomb
Sun Sep 13, 2020 6:04 am
Forum: Batteries and Battery Management
Topic: How to charge a 4 cell module out of the car
Replies: 14
Views: 738

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

I am hesitating to hook up my Noco Genius 3500 even though it says Li-Ion, as it also says 12V Li Ion. I didn't know there was such a thing. Maybe a 3 cell battery? ... it seems to put out 14.4V when in Li Ion mode. That's not enough I'd say it's designed for 4-cell LFP (Lithium Iron Phosphate, whi...

Go to advanced search