1001 Copters
Member
Hi guys,
I have tested a 4S 4500mah nanotech this week end and I have had a little "surprise".
I'm using it on a multicopter (quadricopter) it's hoovering with 24A, 350Watts.
On my quadricopter I have a visual and sound alarm that allow me, generally, enought time to land safely but here...
it's 10/15 second to land and the LiPo is really out of energy !
On the first LiPo, I cut of the atlitude control so I goes down sudenly but there was no response at all in the gaz: I pushed the stick to counter the effect of cutting the alti control, but nothing happen...
On the second LiPo I didn't have time to exit the landing gear: same thing: no more gaz :/
It seems that I have to place the low voltage warning at ... 14,5V to ensure a safe landing (cf curve)
here is the video:
and here is the graph for tension/intensity:
I have measured the tension on each individual cell at the end of the LiPo.
first LiPo; alarm has been placed at 13.2V
I had this result:
C1: 3.62V
C2: 3.20V
C3: 3.12V
C4: 3.10V
total 13.04V
second LiPo, this time alarm has been placed at 13.6V
I had this result:
C1: 3.47V
C2: 3.01V
C3: 2.88V
C4: 2.91V
total: 12,77V
Thats sound strange because the low battery warning has been lifted up from 13.2 to 13.6V and the LiPo was more empty.
Any advice about this very low voltage and the brutal end of the battery ?
I have tested a 4S 4500mah nanotech this week end and I have had a little "surprise".
I'm using it on a multicopter (quadricopter) it's hoovering with 24A, 350Watts.
On my quadricopter I have a visual and sound alarm that allow me, generally, enought time to land safely but here...
it's 10/15 second to land and the LiPo is really out of energy !
On the first LiPo, I cut of the atlitude control so I goes down sudenly but there was no response at all in the gaz: I pushed the stick to counter the effect of cutting the alti control, but nothing happen...
On the second LiPo I didn't have time to exit the landing gear: same thing: no more gaz :/
It seems that I have to place the low voltage warning at ... 14,5V to ensure a safe landing (cf curve)
here is the video:
and here is the graph for tension/intensity:
I have measured the tension on each individual cell at the end of the LiPo.
first LiPo; alarm has been placed at 13.2V
I had this result:
C1: 3.62V
C2: 3.20V
C3: 3.12V
C4: 3.10V
total 13.04V
second LiPo, this time alarm has been placed at 13.6V
I had this result:
C1: 3.47V
C2: 3.01V
C3: 2.88V
C4: 2.91V
total: 12,77V
Thats sound strange because the low battery warning has been lifted up from 13.2 to 13.6V and the LiPo was more empty.
Any advice about this very low voltage and the brutal end of the battery ?
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