Welcome to Multi-Rotor UK. Please login or sign up.

Monday,February 17, 2020, 22:57:57

Login with username, password and session length

Shoutbox

Andy7:
17 Feb 2020 16:56:32
Welcome Andy777! You might get a better response if you drop your question onto one of the Forums here - answers would just get swamped.  :beer2:
Andy777:
14 Feb 2020 16:14:59
Hi there. Im new. Having problems with my tarot landing gear. Its plugged into ch7 on futaba receiver. When i flick switch on transmitter i can hear a faint click on both legs but no movement. My flight controller is a mini px4 with no aux out terminals.
sh0wtime:
09 Feb 2020 16:57:32
and another :smiley:
Gaza07:
09 Feb 2020 10:22:04
Time for a new shoutbox post   ;)
Rares Gosav:
17 Jan 2020 17:44:22
Hi guys and happy new year!!!
ched:
01 Jan 2020 00:12:50
Happy new year everyone, happy flying.  :beer2: :beer2:
Gaza07:
31 Dec 2019 17:06:13
Happy new year all hope 2020 is a cracking year for you  :beer2:
ched:
25 Dec 2019 00:00:49
Happy Christmas to everyone.
apollo7:
24 Dec 2019 13:50:56
Seasons greetings to all on this forum have a good one ;)
ched:
21 Dec 2019 17:58:42
Have a great time DB. Look forward your projects in 2020.  :beer2:
Members
Stats
  • Total Posts: 197690
  • Total Topics: 19954
  • Online Today: 60
  • Online Ever: 530
  • (Tuesday,June 26, 2012, 08:34:46 )
Users Online
Users: 2
Guests: 32
Total: 34

Theme Changer





thumbnail

3d - Printworx

Printing 3d Forum

LifePO4 or LiPo

Started by goraplx, Monday,October 29, 2012, 10:33:00

Previous topic - Next topic

goraplx

HI. I just received battery : http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=14061

I don';t understand why this pack is called lifepo4 . I expected cylindrical cells but they are look like LIPO cells.

Thanks for reply.
DJI F550 Hexa Naza & GPS
JR XG8 , Graupner 9" Props
LifePO4 - A123 5S1P 2300-2500mAh ANR26650M1A and B cells
GoproHD2 , Fatshark Rx, ImmersionRC Tx 600mW, Fatshark Dominator, SpiroNet set Antenna, EzOSD+CurrentSensor

BOINC->
http://signature.statseb.fr/sig.py?id=33

teslahed

LiFePO4 refers to the chemistry of the battery;

http://en.wikipedia.org/wiki/Lithium_iron_phosphate_battery

LiFePO4 batteries come in all sorts of different shapes and sizes. You might be thinking of the A123 cells;

http://en.wikipedia.org/wiki/A123_Systems



which are a particular brand of LiFePO4 cell that does come in a cylindrical form.
One circlip short of a quadcopter.
 1 lobe short of an antenna.

goraplx

Monday,October 29, 2012, 11:19:43 #2 Last Edit: Monday,October 29, 2012, 11:21:48 by goraplx
I use A123 grade A and B which are 2300 and 2500mAh. Got 40 cells together ;) . My album-> https://picasaweb.google.com/117142172880292207634/Hexacopter#5783523190622537138 Because my last accident with lipo i would like buy lifepo4 3s for my googles.

LiPo can explodes or fires. LiFePo4 cylindrical cells never explode (99% imo) or fire. Thats why i wanted cylindrical cells.(SAFE)

Never seen this type of cells called lifepo4 . Most of  lifepo4 cells are cylindrical (A123,GWL,  and other companies).

Someone wrote max is 3.3V per cell in this pack. Thinking now what will be discharge curve for zippy 1800mah life pack.. same like for all lipos or flat like for all cylindrical A123 cells.
Im gonna check in a sec.
DJI F550 Hexa Naza & GPS
JR XG8 , Graupner 9" Props
LifePO4 - A123 5S1P 2300-2500mAh ANR26650M1A and B cells
GoproHD2 , Fatshark Rx, ImmersionRC Tx 600mW, Fatshark Dominator, SpiroNet set Antenna, EzOSD+CurrentSensor

BOINC->
http://signature.statseb.fr/sig.py?id=33

Gaza07

The cells from hobby king are LiFePo4 cells they are just in a different package and shouldn';t be able to busrt into flames, they might look like lipo';s but they are not, Maybe the A123 brand is copyrighted  :shrug:

goraplx

Thanks guys. This battery is 30C from HK and its ok for me.. F550 Naza takes max 30-32A in my setup.  So.. If they are much safer than lipo and are in lightest pouch they can be better alternative than A123 cylindrical. Hmmm.
Discharge curve i think will be similar to A123 cells and will be very hard to monitor voltage with normal lipo/life checkers.

I want to test this 1800mAh...  Maybe i will try overcharge it on the field and try do short circuit and we will see how safe it is :D
DJI F550 Hexa Naza & GPS
JR XG8 , Graupner 9" Props
LifePO4 - A123 5S1P 2300-2500mAh ANR26650M1A and B cells
GoproHD2 , Fatshark Rx, ImmersionRC Tx 600mW, Fatshark Dominator, SpiroNet set Antenna, EzOSD+CurrentSensor

BOINC->
http://signature.statseb.fr/sig.py?id=33

Gaza07

You could bang a large nail through it that would really test it  :whistling:  ::)

goraplx

DJI F550 Hexa Naza & GPS
JR XG8 , Graupner 9" Props
LifePO4 - A123 5S1P 2300-2500mAh ANR26650M1A and B cells
GoproHD2 , Fatshark Rx, ImmersionRC Tx 600mW, Fatshark Dominator, SpiroNet set Antenna, EzOSD+CurrentSensor

BOINC->
http://signature.statseb.fr/sig.py?id=33