Propeller size tunning / new 18650b batteries cells

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Re: Propeller size tunning / new 18650b batteries cells

Postby afernan » Tue Dec 25, 2012 10:32 am

So, in summary, it looks that there is a potential 18650B solution that could double flight time compared with classical lipos. But the cost can reach an order of magnitude higher.
Angel
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Re: Propeller size tunning / new 18650b batteries cells

Postby afernan » Wed Dec 26, 2012 3:33 pm

Below some more data playing with different configurations of cells & number of packages to reduce the intensity of each cell.
I´ve bought a set of 16 cells to play with several configurations. I want to try a 4/4 conf (4s x 4p) that theoretically will lead to 1 h flight in my small 1Kg copter. Attached is the excell file If you want to play other confs. (bat data come from Panasonic specification perfo).

BTW, can we use a 5s battery on AQ without voltage adaptor?
Attachments
panasonic 18760b.xls
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Re: Propeller size tunning / new 18650b batteries cells

Postby bn999 » Wed Dec 26, 2012 4:07 pm

afernan wrote:BTW, can we use a 5s battery on AQ without voltage adaptor?


You need to replace the Recom's with 1A versions instead of the 1.5A versions that are there already. They are rated up to 32V.
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Re: Propeller size tunning / new 18650b batteries cells

Postby Kisssys » Wed Dec 26, 2012 4:09 pm

The max input voltage to the AQ recom regulators are 18 volts. You can swap out the 2 recoms with digikey PN 945-1053-ND. This will give you a max input voltage of 32 volts but will limit the current output to 1 amp which may be an issue if using the board to run sevo's, bluetooth, etc.

If your not good at soldering I would recommend cutting the old Recoms at the base, so you can heat each individual lead as you remove it from the board to prevent overheating anything trying to get all three leads hot enough to lift it out. Chip Quick works well to remove all three at once.

You will need to have a V2 board or a V1 board that has had R4 updated to 8.45k so that the correct voltage will be read.

I've on installed those Recoms on my last 2 board's and I think that is what Bill did also.

As I previewed this I see Bill beat me, well extra stuff anyway!
Steve
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Re: Propeller size tunning / new 18650b batteries cells

Postby codeforge » Wed Jun 05, 2013 10:34 pm

Hi,
is there an image on how to make 4s4p 18650 batteries with cable for balancing cell when charging?
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Re: Propeller size tunning / new 18650b batteries cells

Postby LPR » Thu Jun 06, 2013 2:26 am

codeforge wrote:Hi,
is there an image on how to make 4s4p 18650 batteries with cable for balancing cell when charging?


From that I've read you need to find a capacitor discharge spot welder and the metal strips to do a good job of connecting the batteries.

If you get the welder and supplies then all you need to do is take apart an old 4s lipo and connect the balancing plug with the same pattered.

Larry
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