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Feb 03, 2013, 05:30 PM
That's a funny word
% is easy to understand (like fractions) , when using voltage for differing cell counts one might have trouble remembering the numbers. Even with only one cell count some math MAY be required.
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Feb 03, 2013, 09:14 PM
Registered User
Quote:
Originally Posted by gulio
% is easy to understand (like fractions) , when using voltage for differing cell counts one might have trouble remembering the numbers. Even with only one cell count some math may be required.
+1!
Feb 03, 2013, 09:36 PM
Registered User
what type of micro sd card is needed? can a micro sdhc (high capacity) be used?
Feb 03, 2013, 10:06 PM
mdv
mdv
Registered User
Quote:
Originally Posted by gulio
% is easy to understand (like fractions) , when using voltage for differing cell counts one might have trouble remembering the numbers. Even with only one cell count some math MAY be required.
I meant I only care about per/cell voltage. I would definately have trouble making use of total voltage only. Now I see why people like %.
Feb 03, 2013, 11:11 PM
Registered User
% capacity during charge can only be a rough estimate at best as it will be directly dependent on charge rate and internal resistance of cells. Packs with higher internal resistance will have a higher voltage than packs with lower internal resistance and will thus show higher charge %, even though actual charge % is identical. Consequently, this 'feature' would be marginally useful, IMO.
Feb 03, 2013, 11:48 PM
iCharger
junsi's Avatar
Hello Everyone,

V2.02 for 4010DUO has been updated, please see details in the first post.

BTW, from February 5th to 18th is our holiday for Chinese New Year--Spring Festival, your problems for Junsi will not be handled during this period until we come back to work on 19th. Sorry for the inconvenience caused and thanks for your understanding.

Best regards,
Junsi
Last edited by junsi; Feb 04, 2013 at 12:59 AM.
Feb 04, 2013, 07:15 AM
Suspended Account
Quote:
Originally Posted by junsi
Hello Everyone,

V2.02 for 4010DUO has been updated, please see details in the first post.

BTW, from February 5th to 18th is our holiday for Chinese New Year--Spring Festival, your problems for Junsi will not be handled during this period until we come back to work on 19th. Sorry for the inconvenience caused and thanks for your understanding.

Best regards,
Junsi
Anybody done this, yet?
Feb 04, 2013, 08:09 AM
Registered User
Quote:
Originally Posted by mrforsyth
% capacity during charge can only be a rough estimate at best as it will be directly dependent on charge rate and internal resistance of cells. Packs with higher internal resistance will have a higher voltage than packs with lower internal resistance and will thus show higher charge %, even though actual charge % is identical. Consequently, this 'feature' would be marginally useful, IMO.
It appears your statement is only assuming parallel charging. You wouldn't have to worry about packs with varying internal resistance when charging a single pack.
Feb 04, 2013, 08:43 AM
Registered User
FeffeSvl's Avatar
Quote:
Originally Posted by Ohmic
It appears your statement is only assuming parallel charging. You wouldn't have to worry about packs with varying internal resistance when charging a single pack.
Any displayed charge in % is calculated, not directly measured as a constant. This is true for single pack or with parallell charging, although the calculation is probably screwed up by parallell wiring (unless all packs are identical).
The charger can only see the voltages of the cell/pack and the IR of cell/pack at any given time, and based on these values an estimation is done in those chargers who has the "feature". Unfortunately IR (cell or pack) varies between manufacturers AND within the same pack depending on charge, so it is not an exact science to determine charge %.

It would probably be simple to implement the feature if he decide to do it but I suspect that Junsi prefer to not show a number that cannot be determined with enough accuracy to meet his standards.
Feb 04, 2013, 08:45 AM
Suspended Account
Well no less than FMA do it and they are the gold standard.
Feb 04, 2013, 08:53 AM
Registered User
Quote:
Originally Posted by Ohmic
It appears your statement is only assuming parallel charging. You wouldn't have to worry about packs with varying internal resistance when charging a single pack.
No, the statement applies exclusively to single packs. It was meant to illustrate that % charge cannot be accurate due to physics involved. e.g. - charge state based on voltage is only reasonably accurate in static (no load) condition. Since charging is a loaded condition, % charge will be a rough estimate, much in the same way that voltage during discharge tells little about remaining capacity.

Regards,
Mark
Feb 04, 2013, 08:56 AM
Suspended Account
Look, folks, in many fields, like aviation, there are helpful trend instruments. Take the vsi for example. A trend can be very helpful.
Feb 04, 2013, 09:48 AM
Registered User
It would be neat if the section of the display that shows individual cell voltage could scale its font size based on the number of cells. For 2S packs, for example, you could fit a lot more information on one screen. All that space for the extra cells that aren't connected is going to waste.
Feb 04, 2013, 10:02 AM
Suspended Account
Quote:
Originally Posted by JohnathanSwift
Anybody done this, yet?
Anyone?
Feb 04, 2013, 10:09 AM
Registered User

SD Cards


Is there a list of SD Cards that will work with this. I read through the thread and it seems that some are not compatable.


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