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by pbui19
Tue May 07, 2019 8:10 am
Forum: Batteries and Battery Management
Topic: Battery Capacity Testing
Replies: 58
Views: 19469

Re: Battery Capacity Testing

https://photos.app.goo.gl/S5aaTvQkqG96dP716 hope the photo link can be viewed. It's the Canion Ah history screen of my 2014 since Dec 2018. I've been QCDC charging almost exclusively (to around 80% SOC) , trying to save the onboard charger. The Ah decline line worried me a bit, but it seems to corr...
by pbui19
Tue May 07, 2019 7:09 am
Forum: Modifications & Accessories
Topic: Supplemental cooling for the charger.
Replies: 74
Views: 12877

Re: Supplemental cooling for the charger.

I am sure there is a 12v source back there somewhere but I don't have access to the drawing. I've been thinking of tapping into the coolant pump 12v, which runs intermittently while charging, so then the cooling fan would only run when the pump is running. My thinking is just to duct the flow to get...
by pbui19
Tue May 07, 2019 6:31 am
Forum: Batteries and Battery Management
Topic: Troubleshooting and repair for On-board Charger (OBC), DC-DC Converter
Replies: 404
Views: 60872

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

So it seems a weak 12v aux may not be a culprit then ?

Also, perhaps we should take preemptive action to deal with the marginal fuse contact integrity ?
by pbui19
Mon Apr 15, 2019 1:48 pm
Forum: Batteries and Battery Management
Topic: Battery Capacity Testing
Replies: 58
Views: 19469

Re: Battery Capacity Testing

By "calibration charge", I meant to charge from the blinking 1-2 bars to 100%. My understanding is that when the guessometer hits 2 and below bars, the BMS goes into some sort of integration mode to reset the available Ah. In fact, I don't understand how does the software calculates and re...
by pbui19
Mon Apr 15, 2019 1:33 pm
Forum: Batteries and Battery Management
Topic: 12V battery BCI Size?
Replies: 24
Views: 4169

Re: 12V battery BCI Size?

I happen to have a couple of those UPS 7A LiFe lying around unused, and no I would not pay the extra $ just to get them. It just bugs me that the EV manufacturers are still using lead for the aux, and in particular Mistu because of the potential harm to the charger/inverter. In general, EVs are so &...
by pbui19
Sat Apr 13, 2019 6:43 am
Forum: Batteries and Battery Management
Topic: 12V battery BCI Size?
Replies: 24
Views: 4169

Re: 12V battery BCI Size?

I am so tempted to try out this LiFe 12-v aux lead replacement: https://www.batteryspace.com/lifepo4-battery-12v-9ah-108wh-18a-rate-with-led-indicator-replace-sla-12v-7ah-lighter-weight-and-higher-capacity----un38-3-passed.aspx While the spec specifically says "Must use LiFePO4 charging circuit...
by pbui19
Fri Apr 12, 2019 1:34 pm
Forum: Batteries and Battery Management
Topic: Battery Capacity Testing
Replies: 58
Views: 19469

Re: Battery Capacity Testing

Thank you for your instruction, I was able to get Hobdrive to work; and indeed the Ah is same value as from Canion. I did get the dreaded warning light car-with-!; but it went away upon restart. I am glad to see the 12v-aux voltage display, is there a way to plot this voltage ? my thinking is the pl...
by pbui19
Thu Apr 11, 2019 1:49 pm
Forum: Batteries and Battery Management
Topic: Battery Capacity Testing
Replies: 58
Views: 19469

Re: Battery Capacity Testing

Canion, Hobdrive, and Evbatmon will all give the HV battery Ah capacity. Canion is free but requires a more expensive STN11xx adaptor (such as OBDLink LX) and will not work with a cheap ELM327 adaptor. Hobdrive has a free version and will work with a cheap ELM327 adaptor so is probably the cheapest...
by pbui19
Thu Feb 28, 2019 3:30 pm
Forum: Modifications & Accessories
Topic: how to limit dcqc rate
Replies: 5
Views: 991

Re: how to limit dcqc rate

Thanks for your comments PV1. So each bar does not represent 1 kwh then ? I've always thought that was the reason behind the 16 bars full scale.
by pbui19
Thu Feb 28, 2019 10:07 am
Forum: Batteries and Battery Management
Topic: Care and Feeding of the OBC/dc-dc
Replies: 20
Views: 2340

Re: Care and Feeding of the OBC/dc-dc

I too very much appreciate this thread. Some thoughts: We had noticed early on that the 12v aux batt gets drained if we lock the i using the fob button; so I've gotten into the habit of only to lock with the button on the door. The other source of drainage is the ODLink brick for Canion, so I only p...

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