New Beta code for Battery Meter and SOC%

[phxmark]

On my Magnum ePanel with the BMK, I just cut the BMK leads to the shunt, crimped eye connectors onto the wires and attached the wires to the WBJr.  Works like a charm and the measurements all match between the BMK and WBJr.

[boB]

Thanks PHX !  Good to know that they are co-habitating.

boB

[SolarMusher]

Thanks PHX !  Good to know that they are co-habitating.

boB

Yes, it's true but the BMK has far less jitters (.2A) when it reaches end amps at the end of an absorb charge, WBjr could be 1.5A and more when big loads are running. Just downloaded and installed the last FW yesterday evening, so I can't tell if it will be better.
boB, is there something that can be done inside the Classic to reduce WBjr jitters on a 500A shunt (Epanel)?
Erik

[SolarMusher]

Checked it today with the new FW and WBjr EA has far less jitters and is now working fine within .7A and maybe better.
Great update! Thanks,
Erik

[zoneblue]

Heres the first full charge cycle with 1758.  Pink curve is Wbjr (right way up this time), blue is ibat/Iout.

It is less noisy, but:
- theres an interesting additional regular spike during bulk
- still seems more noisy than Iout. (Ibat)
- still not sure the two datapoints are averaged exactly the same way

This had only the dc fridge overnite, then from about 9am some electronics. I will try to eliminate the loads completely one day to get rid of the noise from the loads.

But one of the consequences of this is that you can still see "negative" loads here and there  (lower curve) when you subtract Iout from Iwbjr.

Also i set EA to WB 5amps, max absorb 90mins. You can see in went into float about 3.5amps if you take the center line of the jitter. It appears to have waited til the top of the jitter was under 5amps.

[ClassicCrazy]

I don't quite understand the %/C . If I am correct it would be to correct the battery capacity lower as the temperature gets colder ?  I don't have any idea what number to put in there.

[Halfcrazy]

Most batteries are 1% per degree C. So if the battery is 15C it looses 10% of its capacity

[cybermaus]

We have an iPad in the kitchen, always ready for the million random questions each day.
One of its permanent displays is my battery monitor. Wife loves this one for the same reason - she can see at a glance how we're going. Not as simple as a % but far more telling:

What app or script is that, and does someone also know one for Android?

[zoneblue]

Thats Ross's cell monitor/eclectic collection of bash scripts hard at work.  The curves further above are from http://code.google.com/p/theblackboxproject/

[Halfcrazy]

Heres the first full charge cycle with 1758.  Pink curve is Wbjr (right way up this time), blue is ibat/Iout.

It is less noisy, but:
- theres an interesting additional regular spike during bulk
- still seems more noisy than Iout. (Ibat)
- still not sure the two datapoints are averaged exactly the same way

This had only the dc fridge overnite, then from about 9am some electronics. I will try to eliminate the loads completely one day to get rid of the noise from the loads.

But one of the consequences of this is that you can still see "negative" loads here and there  (lower curve) when you subtract Iout from Iwbjr.

Also i set EA to WB 5amps, max absorb 90mins. You can see in went into float about 3.5amps if you take the center line of the jitter. It appears to have waited til the top of the jitter was under 5amps.

Yes I believe boB just found an issue with his averaging. You are seeing the same thing I am and End Amps is sort of unusable because of all the positive spikes at the end of the absorb cycle

[boB]

Register address 4260  should be ==  4  if averaging is turned ON.  I found that mine and Ryans was sitting
at 0 so was off.

Register address  4383  should be == 512.  If it is sitting at 0, should be set to 512 if 4260 is at 4.

I do notice that when a load is connected and disconnected, the numbers will rise and fall slowly
just like it should when averaging BUT it is looking like there are some additional spikes or something.
Ryan noticed that the numbers moved around when 4260 == 4 and was solid at 0 so I'm not
sure what is going on there.


BTW, when I say register address,  add one (1) to that number to get register.

Working on it.  I think the problem can be fixed with Classic code so that would hopefully
be the case here.  We'll get this.

Thanks,
boB

[zoneblue]

For now maybe just add 1.5 amps to your desired WBJr EA setting (and dont go below 3amps) and it works good. 

Soooooo much better than the old days, where you had to guess/take into account your base loads

Bob, just to be clear, other than EA smoothing,  i think its really desirable that there is one way or another, a WB register that is averaged the same way and in the same time frame as the Iout figure. The reason is that this allows a Iload datapoint (that doesnt go negative and other weird things). Now, given the addon nature of WBJr, it may not be possble to get the exact same 1s timing, but as near as you can get it. A post processing 10s, 15s, or even 60s averaging scheme based off the 1s averaging should give decent enough data.