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by DBMandrake
Tue Apr 16, 2019 6:51 am
Forum: Batteries and Battery Management
Topic: Is my battery dying ?
Replies: 50
Views: 7023

Re: Is my battery dying ?

I wouldn't see any issue using LEV50N as a replacement for LEV50 if that is what you can find. I'm on the fence about that. If I was in a situation where a cell had failed and it was the only choice to get the car back on the road, then yes I'd try it. If the cell swap is "elective" to tr...
by DBMandrake
Tue Apr 16, 2019 3:09 am
Forum: Batteries and Battery Management
Topic: Battery Capacity Testing
Replies: 47
Views: 15616

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 r...
by DBMandrake
Sun Apr 14, 2019 7:36 am
Forum: Batteries and Battery Management
Topic: Is my battery dying ?
Replies: 50
Views: 7023

Re: Is my battery dying ?

Argh, spoke too soon. Checked today and I have had another sudden 1Ah drop in capacity. It's now at 34.1Ah at 51724 miles. So I've lost almost 6Ah in two years and under 25k miles. Not very impressed at all as SoH is now at about 74%.
by DBMandrake
Sat Apr 13, 2019 12:59 pm
Forum: Batteries and Battery Management
Topic: Battery Capacity Testing
Replies: 47
Views: 15616

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. The warning light was probably caused by connecting Hobdrive to the car before you selected the ECU type...
by DBMandrake
Sat Apr 13, 2019 12:41 pm
Forum: Batteries and Battery Management
Topic: Is my battery dying ?
Replies: 50
Views: 7023

Re: Is my battery dying ?

Thought I'd post an update on the weak cell situation. The car is now up to 51k miles and there has been one further "sudden" drop in Ah capacity, followed by a "normal" steady decline. Ah capacity is now 35.1Ah: https://drive.google.com/uc?export=download&id=1tlhCdEPyFlBZPHT...
by DBMandrake
Fri Apr 12, 2019 1:13 am
Forum: General / Main Owners Forum
Topic: new program for monitoring charge readings
Replies: 69
Views: 7781

Re: new program for monitoring charge readings

I initially said that the CMU voltage readings were incorrect but I've just discovered that isn't the case. (So I've amended my original post) In fact the individual CMU reported voltages are correct, it's only the 88 cells page (which shows all cells on one page instead of per CMU) that is incorrec...
by DBMandrake
Fri Apr 12, 2019 12:57 am
Forum: General / Main Owners Forum
Topic: new program for monitoring charge readings
Replies: 69
Views: 7781

Re: new program for monitoring charge readings

i think what is puzzling to everyone is why do the BMU and CMU voltages not match up exactly--there is about 0.100 volts difference between the two for the same cells. Which value is correct, and why is there an indicated difference in the readings? The BMU values (min voltage and max voltage) are ...
by DBMandrake
Fri Apr 12, 2019 12:46 am
Forum: Batteries and Battery Management
Topic: Battery Capacity Testing
Replies: 47
Views: 15616

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 DBMandrake
Mon Apr 08, 2019 8:26 am
Forum: Batteries and Battery Management
Topic: Battery Capacity Testing
Replies: 47
Views: 15616

Re: Battery Capacity Testing

Is there a software for checking the HV battery capacity for Android? There are several. 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...
by DBMandrake
Sat Mar 23, 2019 9:59 am
Forum: General / Main Owners Forum
Topic: new program for monitoring charge readings
Replies: 69
Views: 7781

Re: new program for monitoring charge readings

OK! in fact, your testing is very important, I have something to compare, there is diagnostic equipment. so while everything is within the margin of error. and it is still possible that you need to calibrate Elm327 by voltage, by the way there is a difference in the survey formulas, so this is quit...

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