difference between SOC and SoC

[decrep]

I've just acquired and OBD scanner, and playing with it to see what it does. It has %s for SOC and SoC, one the same as the car display, and the other a bit higher. Google doesn't seem to know about this, it only has info on SOC1 and SOC2.

I think I saw it mentioned on one of these forums, but I can no longer find it.
So any clues, anybody?

 

[wattmatters]

I presume one is based on real capacity, the other usable capacity.

 

[decrep]

Yep, the app has it labeled, if you look in the right place. SOC is the real battery state, SoC is the displayed usable charge.

 

[fnegroni]

What app are we talking about here? Carscanner? Using the mg4 profile?

 

[decrep]

What app are we talking about here? Carscanner? Using the mg4 profile?

Yes, still playing with it.
It's set the car alarm off a couple of times now. I think I have to disconnect before walking away?

 

[fnegroni]

Yes, still playing with it.
It's set the car alarm off a couple of times now. I think I have to disconnect before walking away?

Yes unfortunately I haven’t figured out if there’s a way to get it to stay off while car is locked.

 

[decrep]

I think just pull the dongle out should work

 

[fnegroni]

I think just pull the dongle out should work

Yeah but now carscanner has CarPlay integration it’s not great to have to reconnect the dongle every time.

 

[wattmatters]

It's set the car alarm off a couple of times now. I think I have to disconnect before walking away?

Yeah it's a bit of a pain. I had that when using ABRP with OBD reader when I trialled that. Drove me nuts.

 

[decrep]

Yeah but now carscanner has CarPlay integration it’s not great to have to reconnect the dongle every time.

I couldn't get carscanner to connect to CarPlay, it seems stuck on google maps or music.

Also how do you get the graphs onto the computer. I can't find anything that will open the .brc files. Or take a screenshot of the app display.

 

[fnegroni]

Data recording – Car Scanner ELM OBD2

www.carscanner.info

The brc file format is a sort of data logging backup.
You could ask chat gpt to analyse it and write a Python programme to extract the data, but isn’t it better to export into csv and use something like excel or chat gpt to do same?

 

[decrep]

I don't see any export facility at all, do you need the paid version for that.

Apparently the .brc format, is from a Bryce 3D modeling app, used by different sorts of programs. Some of these other programs may be able to open the file, but whether they than can make sense of it is another matter.

I'm not sure I want the data as a spread sheet, I'd like to see the graphs on this computer.
It would be fine if it had a laptop program. but it only does phones.

 

[fnegroni]

I don't see any export facility at all, do you need the paid version for that.

Apparently the .brc format, is from a Bryce 3D modeling app, used by different sorts of programs. Some of these other programs may be able to open the file, but whether they than can make sense of it is another matter.

I'm not sure I want the data as a spread sheet, I'd like to see the graphs on this computer.
It would be fine if it had a laptop program. but it only does phones.

I might be wrong on this one but you can run Android apps on Windows natively now.

Plus a spreadsheet is easily converted into a chart and Copilot can do that for you really easily

I do have the premium version of car scanner I think it’s worth every penny

 

[DixieTGS]

Yep, the app has it labeled, if you look in the right place. SOC is the real battery state, SoC is the displayed usable charge.

Is the displayed value on carscanner the same as shown on the drivers screen?

If it is correct that is only for the SE. On an LR the displayed value is several percent out presumably because the buffer at each end of the battery is different.

 

[decrep]

From memory the app had a decimal place but the car didn't, apart from that I think they were the same.
If I remember tomorrow I'll check.

 

[DixieTGS]

That's interesting thanks. Given enough raw SOC values and the corresponding values from the car dash I can create a custom value for the LR SoC.

Do you have any delays in the carscanner dashboards loading? Mine take up to 10 seconds to complete and some values are blank or nonsense.

 

[decrep]

yes, can't remember exactly what it said about the MG4 profile, something like beta, or maybe provisional? So I guess it's still a work in progress.

I also have blank and meaningless values.
The android auto screen also lacks the nice graphs.

So you want, a range of charge states, with SOC and SoC values?

 

[decrep]

Hmm just checked and it's not what I thought.
Car says battery at 72%
Scanner says SoC displayed 74.19.
State of charge 73%

That doesn't add up?

Also I'm not sure if our different battery chemistries make this relevant to you?
Could it be the reason the LR version doesn't have the 2 values?

 

[Coulomb]

Car says battery at 72%
Scanner says SoC displayed 74.19.
State of charge 73%

My wild guess: the car truncates down (say 72.6 → 72), and the app rounds up (72.6 → 73). In my limited experience, Chinese software and firmware rarely bothers to round numbers properly, even though it's quite easy.

Edit: Oops, I see your point; the "SoC displayed" should be the one that agrees with the car, and should be the higher of the two, at least at higher SoC and SOC.

So that doesn't work out; sorry.

 

[decrep]

So that doesn't work out; sorry.

Good try though, another MG mystery I guess