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FrSky SP-FLVS - Smart Port Lipo Voltage Sensor
- Thread starter Tommyt
- Start date
Konrad
Very Strong User
I'm sorry I don't have two SP-FLVS to help work through this question. I hope someone will be able to answer this definitively.
https://forum.alofthobbies.com/inde...smart-port-lipo-voltage-sensor.237/#post-1836
I have to ask, are your batteries so mismatch (impedance) as to be a concern? If so might the Wart Hog deserve a new set.
https://forum.alofthobbies.com/inde...smart-port-lipo-voltage-sensor.237/#post-1836
I have to ask, are your batteries so mismatch (impedance) as to be a concern? If so might the Wart Hog deserve a new set.
Oh no it's a brand new plane and batteries. Haven't even put it together yet. I want to use LiPo voltage telemetry because I want to ensure that I don't run out of juice and most importantly I don't let my LiPo go past 80% discharge so that my expensive LiPo will last a long time.
Konrad
Very Strong User
Then reading just one bank of the parallel battery will do what you want. The 20% charge is a rule of thumb so if one cell goes to 18% while on final there is no issue. This assuming you bring the cells to storage level when they cool down.
A dark secret of Lipos is that they only last about 2 years even if stored and run properly. I define "last" (being good) as being able to deliver 80% of their rated energy.
Do break in your batteries by charging and discharging them at 1C, three or four times before flying them at a current draw that is many times higher than 1C.
Expensive Lipos? Lipos today have to be some of the best value in energy storage devices. I recall in the beginning of the millennium paying $79 for a 2100mAh 10C 3cell lipos and being happy at that price. And that was with the buying power of the "2000 dollar".
A dark secret of Lipos is that they only last about 2 years even if stored and run properly. I define "last" (being good) as being able to deliver 80% of their rated energy.
Do break in your batteries by charging and discharging them at 1C, three or four times before flying them at a current draw that is many times higher than 1C.
Expensive Lipos? Lipos today have to be some of the best value in energy storage devices. I recall in the beginning of the millennium paying $79 for a 2100mAh 10C 3cell lipos and being happy at that price. And that was with the buying power of the "2000 dollar".
Last edited:
Thank you so much for your replies and info so far.
I guess I should have mentioned that on the A-10 I have two 100A ESC; one for each motor. Each of the two 6s powers one ESC and motor. That's why I am thinking I need two of the smart port voltage sensors. One for each battery.
I am wondering how I connect the two smart port voltage sensors to my X8R receiver and then set up the X10S w/OTx to give me individual cell voltage for each battery and total voltage for each battery? I would also like a couple alarms. Perhaps one at 70% discharge of the lowest pack and another at 80% discharge.
I guess I should have mentioned that on the A-10 I have two 100A ESC; one for each motor. Each of the two 6s powers one ESC and motor. That's why I am thinking I need two of the smart port voltage sensors. One for each battery.
I am wondering how I connect the two smart port voltage sensors to my X8R receiver and then set up the X10S w/OTx to give me individual cell voltage for each battery and total voltage for each battery? I would also like a couple alarms. Perhaps one at 70% discharge of the lowest pack and another at 80% discharge.
Konrad
Very Strong User
This might not be a problem as I'm reading that guys are using these on 12 cell series systems. You might have to write a script to get the proper overall voltage reading. But it is looking like at the cell level it might be possible.
This is a good question. Please let us know the out come. Heck, I might have to buy two of these and work on the problem myself.
This is a good question. Please let us know the out come. Heck, I might have to buy two of these and work on the problem myself.
Konrad
Very Strong User
Sorry all I’ve done is a google search for " Frsky SP-FLVS sensors in parallel"
http://www.openrcforums.com/forum/viewforum.php?f=97&sid=62b2297c4330ed606902d3fb16f5689d
https://www.helifreak.com/showthread.php?t=696518
Hope this helps,
Konrad
http://www.openrcforums.com/forum/viewforum.php?f=97&sid=62b2297c4330ed606902d3fb16f5689d
https://www.helifreak.com/showthread.php?t=696518
Hope this helps,
Konrad
