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tomp
 tomp
(@tomp)
Estimable Member

So I am designing a DIY battery for my TC. I am using 26650 (5000mah) cells and have designed a 17s6p battery that fits perfectly into the original space. It will be a 60v30ah unit, same as the original. Should hopefully cost about £500.

Currently waiting on the cells from china plus the battery welder. Watch this space for updates 🙂

 

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This topic was modified 4 months ago by tomp
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Posted : 21/11/2018 16:16
Super Honda
(@super-honda)
Trusted Member

Building your own battery seems serious, have you done any earlier?

£500, thats about €560?, then you need a BMS, how do you think about the case design, aluminium as original?

I have a pair of electric trial motorcycles wich now is equipped with china-built batteries for the nearly the same money, I looking for sellers who offer Samsung / LG / Panasonic original cells.
What is the reason to build your own battery, mostly because you can or do you want certain characteristics?

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Posted : 21/11/2018 17:12
Artem_TC
(@artem_tc)
Eminent Member

without original bms you will always see blinking 0% SOC on display

Super SOCO TC (version for china market) owner

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Posted : 21/11/2018 17:15
Super Honda
(@super-honda)
Trusted Member
Posted by: Artem_TC

without original bms you will always see blinking 0% SOC on display

Think you can avoid that using it in parallel with the original battery as all 3rd party batterys seems to be connected.

TB2JT03XqagSKJjy0FgXXcRqFXa !!106670118

 

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Posted : 21/11/2018 17:43
s550v and tomp liked
tomp
 tomp
(@tomp)
Estimable Member
Posted by: Artem_TC

without original bms you will always see blinking 0% SOC on display

I’m going to connect it in parallel with the original battery so as to keep the overal % reading. Basically using an xt60 Y lead. Im also going to swap the horrible ‘melty’ connector ?

 

Ive built smaller batteries before and like having a winter project! Also I will be saving money too. I’ve found a BMS with Bluetooth/app which can handle the current draw of the Soco. 

 

Im still yet to work out the casing... wanna make sure it works first! I’ve been learning from this bloke:

https://youtu.be/EEHPeidNqws

 

Sad thing is his ebike is a lot faster than our SOCO ?

 

This post was modified 4 months ago by tomp
ReplyQuote
Posted : 21/11/2018 17:47
s550v liked
tomp
 tomp
(@tomp)
Estimable Member

So here is the first test battery. Its a 3s (12v) 30amp section. Works well and is all in balance.

Now that this test works, I need to make another 14s and link them all together in series to make the full 17S30P pack. Waiting for the slow boat from China now.... stay tuned 🙂

AE347D39 751D 40F5 B857 545C18D39AEB

 

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Posted : 13/12/2018 13:45
tomp
 tomp
(@tomp)
Estimable Member

Batteries and BMS have arrived. Ive put together the first 9s to test the BMS. 

Works very well and has an app (that actually works!!) to monitor the cell voltages and temps etc. Much better than the Super Soco's BMS.

Next step is build the next 8 sells, attach the BMS properly, wrap in Kapton tape/neoprene (padding) and finally heat shrink. 

IMG 7496
IMG 5506
IMG 6550

(-30 temp on the app because i haven't attached the thermistors yet)

This post was modified 3 months ago by tomp
ReplyQuote
Posted : 23/12/2018 12:08
supersoco Amsterdam
(@supersoco-amsterdam)
Moderator Moderator

Looking good Tom ?btw Merry Christmas ?

Owner of a Limited edition and a TS1200R BlackSpider edition ?️

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Posted : 25/12/2018 10:31
s550v liked
tomp
 tomp
(@tomp)
Estimable Member

Thank you ? Merry Christmas to you too!

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Posted : 26/12/2018 10:08
tomp
 tomp
(@tomp)
Estimable Member

So the battery is almost finished! Ive managed to have a test ride and it all works as expected. I was able to travel 52 miles and arrived home with 30% battery. Not bad.

However, I did have a few issues. It seems when plugging in another battery, the bike can sometimes go into 'charge/regen mode' randomly. I think this is to do with both batteries trying to level off. This is not great though as it leaves you at the side of the road in charge mode until it recovers  ? 

Solution at the moment is to unplug the data line from the original battery. This cures the problem but leaves you with the 0% flashing battery indicator. Again, this isn't a problem as I have an app to monitor the overall battery state. 

Would like to be able to fix this issue but I fear the BMS in the soco battery is to blame  ?  Unless people know otherwise?

Now just have to cover in giant heat shrink.

Total cost about £550 including the battery welder which I can use again etc!

IMG 9035

IMG 1220

IMG 9946

IMG 6934

IMG 1974

IMG 8884

 

This post was modified 2 months ago by tomp
ReplyQuote
Posted : 08/01/2019 10:35
RedTara
(@redtara)
New Member

Hi Tom, thank you for the post and photos. Clearly a good saving over the official soco battery. 

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Posted : 09/01/2019 07:43
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