DIY Battery Help

xmuf · Apr 26, 2021

Im building an electric skateboard and want to try my hand at building a battery using these holders.
I would prefer the battery to be in a single layer and can't find any tutorials online for that configuration in 10s2p
Any suggestions or help is appreciated

TrotterBob · Apr 26, 2021

I'm no expert but I wouldnt trust those spring connectors to handle the current or to stay in contact while you're riding. If youre not into spot welding you might want to check out the Vruzend battery kit.

Soldering 18650s is also a bad idea as it transfers too much heat into the cells. You probably knew that already.

Heres another no spot weld battery kit:

https://hackaday.com/2018/07/03/an-e-bike-battery-pack-without-spot-welding/

Not sure if they offer a 10s2p pack.

xmuf · Apr 26, 2021

Thanks man, yeah I've seen those kits though none of them have a slim design like the image below. id be down to try spot welding as there's a $40 spot welder that's had good reviews on youtube so I'd be up for that. Although there's no tutorials for the flat configuration Im after so would need some advice on that

flippy · Apr 26, 2021

the configuration does not matter. you need to understand the principles of sport welding and series/parralel connections.

also: you need to allow serious movement between the battery and the board. boards can flex and be fine, batteries do not like to bend, like...at all....

xmuf · Apr 26, 2021

where can I learn

flippy · Apr 26, 2021

xmuf said:
where can I learn

start by looking around this forum in the battery technology section and start reading and searching for keywords for a couple days. trust me, you are not the first person wanting to make your own battery. :wink:

TrotterBob · Apr 26, 2021

There are a few good youtube videos on how to make eskateboard packs flexible. Basically they solder some copper wire to nickel strip tabs then spot weld the assemblies to the cells. 2p just means you'll have 2 cells next to each other.

I would also look around the E-skateboard specific forums. They should have some good build guides.

xmuf · Apr 27, 2021

18650 samsung q30 cells
The end is welded when they are stood up right then folded flat
would .15 nickel be thick enough?

TrotterBob · Apr 27, 2021

If your nickel strips dont handle enough current in certain places you can always double them up. No need to shop for thicker or wider.

https://www.youtube.com/watch?v=wdZ_Ca_sAZE

eMark · Apr 28, 2021

xmuf said:
where can I learn

https://www.youtube.com/watch?v=pouyqky2pF8

https://www.youtube.com/watch?v=xPWvdvJii_0
https://www.youtube.com/watch?v=QxDJ42D_yjc
https://www.youtube.com/watch?v=ZPrNgl4JwsU
https://www.youtube.com/watch?v=zZq2LFi16yc

https://www.youtube.com/watch?v=s5PQp15rNdY - NESE modules (instead of spotwelding)

https://evolveforums.com/threads/n-e-s-e-18650-cell-module.1485/
https://endless-sphere.com/forums/viewtopic.php?f=31&t=88051

xmuf · Apr 30, 2021

Im building an electric longboard and in the process of purchasing the parts. Ive heard somewhere that the bms eliminates the need for a balance charger? I'm unsure and don't won't to buy any unnecessary parts, what would be the simplest way to charge/run

flippy · May 1, 2021

yes, a bms with balance feature means you dont need a special charger.

eMark · May 1, 2021

Start considering the advantages of going this route instead of DIY. Here's one possibility ...

https://www.alibaba.com/product-detail/ISO9001-UN38-3-36V-5Ah-lithium_60716761184.html?spm=a2700.9099375.0.0.2f4519cavfNk56

Your main challenge is to provide attachment/enclosure as shock proof and weather resistant as possible to protect battery. Being you have no previous spot-welding experience buy a pack already assembled like the above. Going this route will save you the time and any frustration of a 1st time DIY battery build. ENJOY the ride :thumb:

agniusm · Jun 5, 2021

Check this thread as well : https://forum.esk8.news/t/nese-the-no-solder-18650-battery-system/1777/666

DIY Battery Help

xmuf

1 mW

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TrotterBob

100 W

xmuf

1 mW

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flippy

1 MW

xmuf

1 mW

flippy

1 MW

TrotterBob

100 W

xmuf

1 mW

Attachments

TrotterBob

100 W

eMark

100 kW

xmuf

1 mW

flippy

1 MW

eMark

100 kW

agniusm

1 MW

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