using different sets of batteries with DNA

[SteveS45]

In the PDF for the DNA200 this is what it says

Battery indicator: The current state of charge of the battery.

 

[Ben85]

I'm lost...

 

[KenD]

Well, you don't need to believe us but that's the way it works...

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[SteveS45]

If you compare the PDF to that link you supplied they show conflicting info but believe what you like the battery meter shows the current state. And that is the way you understand it to work not the way it works.

 

[KenD]

Why do you think there's a field to input the watt hours, and a watt hour calculator, in Escribe?

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[KenD]

From the Escribe manual, page 21-22:

"To gauge battery life and operate properly the dna 200 needs basic information about the battery attached.
[...]
The battery capacity, in watt-hours..."

The battery discharge curve (and many other variables) are also mentioned, but battery type, capacity, and the cell soft cutoff are the main ones.

In order to accurately monitor the battery level the chip needs to know the capacity. The discharge curve is there to make the battery meter more accurate. Cells don't discharge linearly so by having a discharge curve the battery level reading gives much more accurate information on the actual charge level of the mod.

Get it?

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[SteveS45]

You are confusing how the battery are measured a volt meter reads a batteries standing voltage and that is a given and does not change because you tell the software something different. Discharge profile is not the same. If you could adjust the software to make the battery meter work properly that would not be accurate at all.

 

[KenD]

You are confusing how the battery are measured a volt meter reads a batteries standing voltage and that is a given and does not change because you tell the software something different. Discharge profile is not the same. If you could adjust the software to make the battery meter work properly that would not be accurate at all.

Why are you so obsessed with the discharge profile. From the very start I've said that the battery capacity, in watt hours, is the main thing. Having said that, there's no denying that a proper discharge curve makes the battery meter more accurate. Do you think Evolv included all this just for the heck of it. Doesn't mean that a DNA mod doesn't work without all this being set up, just that the cemetery level meter won't be as accurate as it could be.

In any case, I've said all this repeatedly. No point in me repeating myself any further.

Ps. The battery level meter measures the available capacity, not the volts.

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[SteveS45]

Do not change what you said in the very beginning. You are confusing the Discharge Profile with the battery meter accuracy not me. A meter is a meter and works on fixed parameters.

 

[Spirometry]

How about pulling out where it says the meter will not read the voltage correctly because of the discharge profile?

It will read the voltage just fine, But it won't know what battery level % to assign to the voltage without checking the discharge profile. This is true with any chip, it's just that the DNA's are user definable.

If you compare the PDF to that link you supplied they show conflicting info but believe what you like the battery meter shows the current state. And that is the way you understand it to work not the way it works.

And the current state of charge is calculated from the discharge profile and the WH consumed. (DNA 75 doesn't use WH in the calculation because it doesn't have the balance chip to tell the processor the charging amps.)

 

[Spirometry]

Do not change what you said in the very beginning. You are confusing the Discharge Profile with the battery meter accuracy not me. A meter is a meter and works on fixed parameters.

And the parameters are in the discharge curve.

 

[KenD]

Do not change what you said in the very beginning. You are confusing the Discharge Profile with the battery meter accuracy not me. A meter is a meter and works on fixed parameters.

This is what I said in my first post.

With the DNA200 and 250 chips you setup the watt hour of the battery pack in Escribe. If you've set up the watt hours to correspond to two 3000 mAh batteries the battery meter won't be accurate when using two 2500 mAh batteries (and vice versa). This naturally applies if you've set up a discharge curve as well. The discharge curve for one set won't be the same as the curve for a different set. It won't affect the actual battery life, only the accuracy of the battery pack. Note that this affects mods using the DNA 200 and 250 chips (so two-battery DNA 133 and 166 mods as well), not mods using the DNA 75 chip.

So, as you see, the watt-hours were what I was mainly talking about. Still, the discharge curve has an impact as well. How could it not? This is the last time you'll draw me into this. If you want to continue, why not instead try to explain how inputing the correct capacity doesn't improve the accuracy of a meter that measures capacity, and how including the proper discharge curve doesn't affect the accuracy when the capacity decrease isn't linear?

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[Eskie]

How about pulling out where it says the meter will not read the voltage correctly because of the discharge profile?

There is a thread about this on the Evolv forum Battery meter logic - Evolv DNA Forum

 

[whiteowl84]

It takes more pulls to get an HG2 down to 4v than it does an HE4. Thus the HG2 would have a higher percentage of charge.

It's not so much about reading the voltage properly but about what the current voltage means in terms of longevity.

EDIT: I hate Tapatalk for recommending a thread that hasn't been posted in for 3 days. Facepalm.