Starting Tips | Ask Questions | Introductions | Categories

High Power 10s Lipo Battery Pack with BMS

Looking for more hill climbing power than I could get from my 10s2p with 26650 Lions(it works great on flat ground) This new project is a 10s1p using Turnigy 2s/5000mah/60c hard packs from Hobby King 5 Packs wired in series is smaller and 2lb lighter than the Lion pack! https://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=52279 I used these jst extension wires to extent the balance wires to the bms: omitting the black ground wire and using only the pos wires from cell 1 and 2 of each pack. I did this instead of hard wiring to allow for easier testing and replacement of individual cells

I attached the packs to the deck with servo tape.

Hard wired the packs in series for better power transfer and to reduce bulk. Using adhesive lined shrink tube and squeezed the ends to close it up.

I decided to keep the balance lead connectors for easier testing and replacement of individual packs.

Completed:

I took it for a quick test ride with only 38v on the pack. Powering up a 12% grade the voltage sag was no more than 1 volt. More test results to follow…

62 Likes
Battery Management System + Zippys?
Diy battery pack using Basen 26650 hi drain Li-ion cells
Noob Build: Parts List
Battery Management System + Zippys?
First time build 6374 single drive
First time build! Never going to start if I don't post this
6s2p battery capcity question LGHG2
May I graduate (probably highschool level not college level :D) from this forum?
From racing drones to electric skateboards, time for the first build
Upgrading batteries a year later
36" Kicktail | 90mm Dual HUB | 10s2p (10x 5000mAh 2s 20C) | Still need BMS + Wiring & Enclosure - Help/Suggestions
Battery not Charging!
What's the difference in performance between dual a 6374 and dual 6355?
LiPos C ratings vs mAh battery choice
You're My Board, Blue | BeercanBoards Kegger Lite | 90mm ABEC Clones | Single Belt Drive | Hobby LiPo Packs | VESC
First DIY electric longboard
Starting first build and could use some help with parts
Utter noob help
Help with battery
Good price on turnigy graphene 2s2p 5000mah hardcase
10S2P bms wiring help needed
Help picking BMS amperage
Suggestion on battery pack
Too Many Amps or voltage cutoff?
What setup will give me more range
Lipo's vs Lion?
START HERE | FAQ for DIY Electric Skateboard builders
First build, parts feedback
First Build Choices | 12S2P OR 12S1P LiPo?
Need help with charging
My final enclosure solution
Thinking of building my first Eboard, how does this look
Battery Choice (lipo vs li-ion)
The Namasaki Rebuild- 10s Lipo w/BMS, Dual Focbox and Carvon V2.0 upgraded to TB Direct Drive
Bestech BMS, Switch not working
Wiring and Charing 3 4s batteries in series
Putting together a LiPo battery - advice please :)
10S LiPo 8000mah Electric Longboardw/ Wiiciever and BMS...?
Where is the Positive and Negative of this Power Jack? And will it be Okay to use Along side a BMS to charge 12s Lipos?
Commuter | Loaded Dervish | Caliber II | Turnigy Aerodrive SK3 213KV | Custom mount | 8S1P 8000 mAh | VESC
Looking for a battery in Australia
A theory on hill-climbing: MASSIVE 12s LIPO's, FOC, dual 6374, and the c-word
High C-rating means good quality battery?
Which BMS should I choose for a 10s lipo setup?
Another noob needing help on my first build
My very first build - for an inexperienced rider. | 125 KV motor | 2x5s1p 5.8Ah | ESC w/BEC ~25-30 kph GOAL | Help appreciated!
Planned Build (Switch 40)
Which BMS should I choose for a 10s lipo setup?
Charging in series - help
Tried a cheap ESC - not so wise, need advice if it will work
RE/PT'ile >> Red Ember Drop Deck / Psychotiller 6x2in AT wheels, x2 190kv 6355 motors / x2 VESC / 10s3p 30Q battery pack
The Green Missile | First Build | Planning Stage: Figuring out the electronics
How should my charging solution be?
"Project X" | First Build | CustomDeck | MBS ATS Truck | Dual 190kv | 10s Lipo | Dual FOCBOX | Build Log
I DID IT GUYS ! I built it
At what voltage your pack reaches 100%
Topkek | Vanguard Flex 2 | Single APS 6355 190kv | Caliber 2 trucks |10s LiPo (?) | VESC
Hoping to built a fast ESK8 with no problem climbing hills
Any tried the BASEN IMR 26650 5000mAh Cells?
Series and Parallel Skateboard Circuits
Great Parts for Sale ***CLOSED***
[NEED HELP] Picking battery for first built (36v)

Very interesting build. This is the first lipo with BMS I’ve seen. Just curious, how are you going to go about charging? Will there be a power switch?

2 Likes

The BMS has a built-in power switch.
I’m charging through the BMS with a 42v laptop style charger.

2 Likes

Ah ok thanks. Do you mind linking where you got the BMS?

1 Like

This is exactly what i was thinking about doing, those 2s lipos are thin, are you using a bestech bms??

Yes, bestech 80a 10s bms

http://bestechpower.com/37v10spcmbmspcbforli-ionli-polymerbatterypack/PCM-D223V1.html

hmmm that would be the only thing that would kill the price for me, i was thinking about a cheaper bms just for charging

These are very reasonably priced. Only around $60
Or you could use a less expensive charge only bms. Just be careful, some cheap bms’s are unreliable.

just need to buy 2 of them is the only problem and then sent to New Zealand which i would get cause they have a switch built in but finding another buyer for one with NZ shipping fees might be hard.

2 Likes

Just charged the battery to 100% and when for a test ride through the hills.
4.5 miles and the battery only dropped to 84%!
Think I’m gonna get more than the 10mi I was hoping for.

3 Likes

Wait sorry if I misunderstood, but the lipos are 10S 5000mah? And they’re in series? Wouldn’t that mean they are 50S 5000mah? I obviously don’t think that’s what you are trying to do so I just kinda assumed it’s 10S 25a?

There are 5 packs in series. Each pack is a 2s/5000mah/60c
So its a 10s1p 5ah 300a discharge.
You may ask, Why in the world would anyone need a battery with 300a discharge?
Point is, very little or no voltage sag when accelerating or climbing hills.
When voltage sag is greatly reduced, You can take the pack lower without tripping the low voltage protection.
And less capacity is needed.

UPDATE
The true discharge capability of this battery is more like 90a, NOT 300a.

7 Likes

If you conecting battery in series the discharge is counting same as Ah? Only voltage doubles.
5x 2s 5000mah 60c in series = 10s 5000mah 60c?
Max amps at 10s (36v) :
60c x 5000mah ÷1000= 300a
Or in paralles capacity and discharge doubles?
5x 2s 5000mah 60c in parallel= 2s 250mah 300c?
Max amps at 2s (7.4v) :
300c x 5000mah ÷1000= 1500a
Am I wrong?

1 Like

In parallel it would be
7.4v
Voltage would be too low for eskate.
The C rating doesn’t change.
Only voltage or capacity changes.

You could connect 6 packs in series and parallel
To make a 6s2p
22v 10ah 60c

Some right some wrong.
The C rating never changes.
Series = multiply voltage
Parallel = multiply capacity
Five 2s/5ah/60c in series =10s/5ah/60c
Five 2s/5ah/60c in parallel =2s/25ah/60c

11 Likes

Hey, really cool build. Very inspired and wantt to do something similar. Is it possible that you could make a diagram of what you did? I recently joined the community and have been reading a lot to figure out how the BMS works and what not but can’t quite understand how you set this up. (I understand the series connections but not the BMS part)

2 Likes

I’m with you on this one. wanting to buy Turnigy 5000mah 2s 20c, but no idea (at least, its 3am where I live my brain might be fried) how to increase cap with those batt packs and increase its voltage?

1 Like

I’m at work now but soon I will give you more info on the balance wiring as soon as I can.