FPV HUB
Advanced search  

News:

Who's Online
  • Dot Guests: 103
  • Dot Hidden: 0
  • Dot Users: 4
  • Dot Users Online:
* Site Sponsor
* Random Gallery Items
Carbon Tail Conversion

Views: 591
Posted by: Coyote
in: Coyote`s Album
Close fly by!

Views: 1094
Posted by: ROVguy
in: ROVguys Album
F450 with FPV

Views: 549
Posted by: ROVguy
in: ROVguys Album
MkII Front

Views: 798
Posted by: wgt40w
in: Ground Station Mk II
* Latest Gallery Items
IMAG0786

Views: 2181
Posted by: Njoro
in: FPV Stuff
Ground Station

Views: 2811
Posted by: Njoro
in: FPV Stuff
IMAG0165

Views: 2674
Posted by: Njoro
in: FPV Stuff
IMAG0161

Views: 1580
Posted by: Njoro
in: FPV Stuff
zeroG Raptor

Views: 1913
Posted by: Njoro
in: FPV Stuff

Pages: 1 2 3 [4]

Author Topic: Lithium Ion Flight Packs....Making your own packs.  (Read 3222 times)

dp106

  • Wing Commander
  • *
  • Karma: 5
  • Offline Offline
  • Posts: 720
    • My Blog
Re: Lithium Ion Flight Packs....Making your own packs.
« Reply #45 on: December 13, 2017, 09:36:29 AM »

One of these packs would be good in my Ranger. It will cruise on 4 amps or if I want to go faster 50% throttle is 9ish amps  :)

I just don't trust myself to solder them and certainly wouldn't be brave enough to try making a spot welder!  I did see some once that came with tabs on, I think they were supposedly to make soldering them easier?

I also saw someone selling plastic blocks that you could use to make up packs, wish I could find the link again! I suspect they would add a lot of extra weight and bulk though which would negate the two main benefits of using the 18650's..
Logged

BigT

  • Nothing works !!
  • Air Commodore
  • *
  • Karma: 22
  • Offline Offline
  • Posts: 2534
  • I'm not deaf just thinking
Lithium Ion Flight Packs....Making your own packs.
« Reply #46 on: December 13, 2017, 10:07:22 AM »

I am going to have a go at making a spot welder with the momentary switch. Really just for something to do and because I have most of the parts in various storage boxes, symptomatic of being a “sort of”retired builder/plumber/engineer/property developer. I have ordered some cells to try out. If it works, which I am sure it will, and I can work it, I’ll weld a pack up for you. Plenty of members have helped me over the years with 3D printing, repairs etc.


Sent from my iPad using Tapatalk
Logged
Favorite TV Series:The Sopranos
Favorite WW2 Movie's: Kelly's Heroes, Battle of Britain, Band of Bro

dp106

  • Wing Commander
  • *
  • Karma: 5
  • Offline Offline
  • Posts: 720
    • My Blog
Re: Lithium Ion Flight Packs....Making your own packs.
« Reply #47 on: December 13, 2017, 10:17:36 AM »

I am going to have a go at making a spot welder with the momentary switch. Really just for something to do and because I have most of the parts in various storage boxes, symptomatic of being a “sort of”retired builder/plumber/engineer/property developer. I have ordered some cells to try out. If it works, which I am sure it will, and I can work it, I’ll weld a pack up for you. Plenty of members have helped me over the years with 3D printing, repairs etc.


Sent from my iPad using Tapatalk
That would be cool, thanks!

Sent from my SM-G920F using Tapatalk

Logged

English Turbines

  • Group Captain
  • *
  • Karma: 19
  • Offline Offline
  • Posts: 1983
Re: Lithium Ion Flight Packs....Making your own packs.
« Reply #48 on: December 13, 2017, 01:36:28 PM »

  Soldering was easier than I thought it would be TBH...:

 1) Use a large Iron.

 2) Abrade the surface with fine emery or similar and then wipe clean with alcohol.

 3) Apply a little flux to the surface.

 4) Apply the iron (briefly) to the flux to melt it.

 5) Tin the surface of the cell with LMP Solder, ensure you use Leaded Solder!!!!! Don't overheat.

 6) Apply pre-tinned wires to the joint and apply heat to the end of the tinned cell, (not the main wires) until it forms a joint.

 7) The wire conductors in the photo are copper, which solders more readily than steel braided, it's also more conductive.

 8) Lastly, solder on the balance wires, to the copper conductors / cell ends, do not overheat the thin balance wires.


   Flux and Solder :

                             I think the Flux came from B and Q and the Solder came from RS Supplies, note, the solder is 60 / 40 type with 40% being Lead.  Clean off the Flux residue with alcohol when you get finished, its acidic.



                                                                                               :vulture:
« Last Edit: December 13, 2017, 01:52:14 PM by English Turbines »
Logged
Nothing beats the smell of Jet-A at 800 Celsius...:)
Falcon UHF & 1280mhz Video.
SW1900 & Storm.

Billy_boy_2010

  • Group Captain
  • *
  • Karma: 25
  • Offline Offline
  • Posts: 1758
Re: Lithium Ion Flight Packs....Making your own packs.
« Reply #49 on: March 19, 2018, 11:23:30 PM »

hi guys

would love some advice on these little things

I bought 6 of these with the aim of wiring in series and parallel to give 6000 of 3s

however- the motor and prop setup I have is such that I would much rather run 4s.

However- this seems it's likely to be a far harder wiring issue. Is this possible ? and is it possible to balance the cells effectively like this ?

If not i will have to cope with 3s- it's not the end of the world.

Thanks :)
Logged

Dillwhacker

  • Wing Commander
  • *
  • Karma: 10
  • Online Online
  • Posts: 728
Re: Lithium Ion Flight Packs....Making your own packs.
« Reply #50 on: March 19, 2018, 11:35:28 PM »

No, not possible with 6 cells.
You can have 3P2S or 2P3S.
If you want 4S, you need 4 or 8 cells, 4S1P or 4S2P.
 :)
« Last Edit: March 19, 2018, 11:43:20 PM by Dillwhacker »
Logged

Billy_boy_2010

  • Group Captain
  • *
  • Karma: 25
  • Offline Offline
  • Posts: 1758
Re: Lithium Ion Flight Packs....Making your own packs.
« Reply #51 on: March 20, 2018, 01:12:12 AM »

Ah bugger- ok thanks

Think I will have to go for 3s- the airframe won't cope with the extra 2 batteries I fear.

Any hints on how I can wire this up?

Two lots of 3 in series then wires in parallel should be easy enough- but the balance leads are confusing me?

Cheers
Logged

Schalonsus

  • Flight Lieutenant
  • *
  • Karma: 2
  • Offline Offline
  • Posts: 132
Lithium Ion Flight Packs....Making your own packs.
« Reply #52 on: March 20, 2018, 09:28:47 AM »

Better imagine you build three packs of two in parallel and wire these in series. Now the balance leads go between these in series wired packs
Logged

Jake Bullit

  • Group Captain
  • *
  • Karma: 20
  • Offline Offline
  • Posts: 1772
  • Fly,crash,glue,repeat!
Re: Lithium Ion Flight Packs....Making your own packs.
« Reply #53 on: March 20, 2018, 05:29:00 PM »

I found this guide quite useful.I built a 4S2P that`s 6000mAh 60a from an old laptop battery
I AIN`T FLOWN IT YET THOUGH   :+

https://blog.seidel-philipp.de/diy-build-a-longrange-lithium-ion-battery/

Logged
:)"Roads? Where we're going, we don't need roads." :)

Billy_boy_2010

  • Group Captain
  • *
  • Karma: 25
  • Offline Offline
  • Posts: 1758
Re: Lithium Ion Flight Packs....Making your own packs.
« Reply #54 on: March 20, 2018, 11:06:25 PM »

Hmmmm ok thanks guys

Should I wire 3 pairs of parallel, of 2 triplets of series?

The latter seems best to me?
Logged

Dillwhacker

  • Wing Commander
  • *
  • Karma: 10
  • Online Online
  • Posts: 728
Re: Lithium Ion Flight Packs....Making your own packs.
« Reply #55 on: March 20, 2018, 11:31:29 PM »

It depends on if you want 3S (12.6Volts) or 2S (8.4Volts).
If you put them in series, you add the voltage and keep the mAh the same.
If you wire them in parallel, you add the mAh and keep the voltage the same.


Logged

Billy_boy_2010

  • Group Captain
  • *
  • Karma: 25
  • Offline Offline
  • Posts: 1758
Re: Lithium Ion Flight Packs....Making your own packs.
« Reply #56 on: March 24, 2018, 11:25:40 AM »

Ok so I got this built. It's quite time consuming really. in the end I made two 3s packs in series- and then paralleled them up to make 6500 of 3s. Pack weighs around 300g. For reference a turnigy 4000 3s weighs around 250g- so it's around 100g saving for the same capacity.

On the other hand- it cost me £35 to build. I could have had 3 multistars for that price.

Time will tell if it's worth it. One big advantage is the customised form factor.
Logged

gowen

  • Pilot Officer
  • *
  • Karma: 3
  • Offline Offline
  • Posts: 43
    • Sparky Flight
Lithium Ion Flight Packs....Making your own packs.
« Reply #57 on: April 18, 2018, 08:50:11 AM »

For those who don't fancy soldering or spot welding this system could be the answer.

https://electrek.co/2018/04/17/diy-li-ion-battery/
Logged

Drone 5

  • Wing Commander
  • *
  • Karma: 19
  • Offline Offline
  • Posts: 590
Re: Lithium Ion Flight Packs....Making your own packs.
« Reply #58 on: April 18, 2018, 10:39:37 AM »

Interesting. Will give it some thought.

Thanks
Logged
M.
YouTube Channel     wad5uk
Pages: 1 2 3 [4]
 

* Recent Topics
Magnus effect by Coyote
[Today at 09:26:21 AM]


E.T.s Z84...Little Pilot and Micro DVR Test. by English Turbines
[Today at 08:57:38 AM]


E.T.s Skyfun Makeover....Motor and Autopilot. by English Turbines
[Today at 08:50:07 AM]


What arrived today? by English Turbines
[Yesterday at 11:00:29 PM]


Ritewing Mini Drak. by Jake Bullit
[Yesterday at 10:32:06 PM]


Cheap source of 4S lipos in UK? by dp106
[Yesterday at 09:38:25 PM]


Panasonic protected cells?? by Schalonsus
[Yesterday at 12:58:08 PM]


Church Tower by DS123
[Yesterday at 11:20:58 AM]


Remember This? by Dillwhacker
[April 19, 2018, 10:50:11 PM]


Pixhawks & I2C buses - Resolved by chris-s
[April 19, 2018, 10:17:59 PM]


Is anyone up to anything? by FlyingRock
[April 19, 2018, 11:28:26 AM]


ASW Down Under! by drambuidhe
[April 18, 2018, 10:40:59 PM]


An in-depth review of the ImmersionRC Mojo 230 (the Horizon Hobby EU version) by CurryKitten
[April 18, 2018, 12:19:11 PM]


Sharing My Music and Sound FX - Over 1000 Tracks by Eric Matyas
[April 18, 2018, 12:18:35 PM]


Lithium Ion Flight Packs....Making your own packs. by Drone 5
[April 18, 2018, 10:39:37 AM]

* Keywords
fpvhub  fpv hub
first person view video piloting

rc r/c r.c. model aircraft flight pilot fpv piloting wings fly flying flight fuse fuselage aileron tail pan tilt tx rx vtx rtx receiver transmitter video radio control controlled headtracker fpvuk bfpvmfa fpv uk first person view video piloting fpv servo servos easystar easy star multiplex antenna VR1400 fatshark video goggles 2.4 5.8 1.2 900 ghz mhz uhf panel antenna circular fpv polarised tracker dbi 10mw 100mw 500mw camera osd fpvuk bfpvmfa fpv first person view video piloting downlink ezantenna tracker gps EzOSD current sensor tiny telemetry autopilot ccd gopro kx131 kx171 FY21 FY21A FY21AP II IMU oracle diversity processor video switcher fpvuk bfpvmfa fpv uk first person view video piloting insurance simulator delta wing glider funjet quadcropter helis heli helicopter electric nitro scratchbuild scratch build batteries battery 2s 3s 4s lipo lipos fpvuk first person view video piloting Antenna fpvhub  fpv first person view video piloting rc r/c r.c. model aircraft flight pilot fpv Airframe Artifical Horizon Auto pilot Av AWG AWU Bec Brownout Buddy box C rating CG Circular Polarized Data logger Dbi Dbm Dipole Diversity DVR Easycap EPO EPP Failsafe FM Freshnel zone Frequency Gain Ghz Goggles GPS Ground Station Gyro Head Tracker HD Hz Inverted Vee Jst LC Filter Lipo LUX Mah Mhz Omni OSD Pan Patch Platform Polarization Rssi RTH Servo Spotter Telemetry Tilt Tracker Transmitter TVL Ubec UHF Video Splitter Vrx Vtx Watts Yagi  fpv uk first person view video piloting rc r/c r.c. model aircraft flight pilot fpv

http://www.fpvhub.com/forum/index.php?action=sitemap;xml http://www.fpvhub.com/forum/index.php?action=sitemap http://www.fpvhub.com/forum/index.php?action=sitemap;start=0 http://www.fpvhub.com/forum/index.php?action=sitemap;start=100 http://www.fpvhub.com/forum/index.php?action=sitemap;start=200 http://www.fpvhub.com/forum/index.php?action=sitemap;start=300 http://www.fpvhub.com/forum/index.php?action=sitemap;start=400 http://www.fpvhub.com/forum/index.php?action=sitemap;start=500 http://www.fpvhub.com/forum/index.php?action=sitemap;start=600 http://www.fpvhub.com/forum/index.php?action=sitemap;start=700 http://www.fpvhub.com/forum/index.php?action=sitemap;start=800 http://www.fpvhub.com/forum/index.php?action=sitemap;start=900 http://www.fpvhub.com/forum/index.php?action=sitemap;start=1000 http://www.fpvhub.com/forum/index.php?action=sitemap;start=1100 http://www.fpvhub.com/forum/index.php?action=sitemap;start=1200
* Disclaimer
The content, views and opinions expressed within this forum are those of the authors and do not necessarily reflect the views, official policy or position of FpvHub. However, we reserve the right to remove or edit any content considered inappropriate.