Welding battery packs in Europe

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schwibsi   1 kW

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Re: Welding battery packs in Europe

Post by schwibsi » Mar 07 2015 3:22pm

I had a very similar bag sent to me this week.
You would always have to check how many cells you can fit in there.
The Klickfix Micro SL can fit a maximum 40 cells. I have a few of them with 13s3p in there.

To be honest, I don't think too highly of the high capacity cells as they have a higher internal resistance and less cycle life.
For such a small pack, I would also try to manage without a bms, as this will be proportionally expensive and make the pack bigger and less reliable. I've seen far more packs with broken BMS than with broken cells (discounting physically damaged cells)

I could make you a pack from Panasonic 2900mAh PF cells, if you really want the higher energy density, but I still think the V3 are the best bang for the buck.
The 25R cells would make sense if you want higher currents and less voltage drop and the PF cells, I'd recommend for larger low voltage packs for long distance 100km+

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riba2233   1 MW

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Re: Welding battery packs in Europe

Post by riba2233 » Mar 07 2015 3:45pm

http://www.dampfakkus.de/akkuvergleich. ... akku6=&a=5

LG mh1 is high capacity, but also relatively low IR, same as V3 and PF. It's not weak like panasonic B. Plus, he only needs low current.
My electric moped: http://www.evalbum.com/4966

My electric car: http://www.evalbum.com/5364

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moonshine   1 kW

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Re: Welding battery packs in Europe

Post by moonshine » Mar 28 2015 11:37pm

Pm sent!
Current Build: Vector, MXUS 4T in 19" moto, Max-E, 20s8p Samsung 25R http://endless-sphere.com/forums/viewto ... =6&t=67752

Torque Raptor, Cromo V3 in 19" prowheel, Kelly KBL96251, 24s4p (SOLD) http://endless-sphere.com/forums/viewto ... =9&t=56342
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Re: Welding battery packs in Europe

Post by 206monkey32 » Apr 07 2015 10:13am

Hey schwibsi,
I am building a electriC skateboard in Spain. I was wondering a couple of things.

I am Looking to build two Flat battery packs. With same specs.
Ideally above 27 V with 7500-1000 Ah and 20C or above discharge
I have a 105 cm board and would like to fit the pack in an area 20 x 40 cm space to mount it to.
I would ideally like to not worry about balancing cells often so BMS or some other method of keeping cells balanced.

Is this a pack that could be built and how muCh?
Thanks

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riba2233   1 MW

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Re: Welding battery packs in Europe

Post by riba2233 » Apr 07 2015 11:13am

Wow, can you really pull 5400 W on skate board?

I'm asking because you say that you need 20C, but you are probably confused by inflated lipo ratings. 20C lipo is not really 20C, and cells that schwibsi uses are 18650 type that declare C-rate realistically. So, you need to know your max continuous or peak power you can draw from batteries, and that divide that number with battery capacity in Wh, and you got your real C rate.
My electric moped: http://www.evalbum.com/4966

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Re: Welding battery packs in Europe

Post by quamau » Apr 07 2015 4:44pm

Hi Schwibsi,

can you advise on a small / medium saddle bag capable of holding 5p10s of 18650 cells? A different side of the same question is: can you please tell me, based on your judgement, which is the minimum number of parallel cells for say 20A continuous (mountain area here)? Is my 5p estimate realistic? Note I don't need much range.

Thanks.

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schwibsi   1 kW

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Re: Welding battery packs in Europe

Post by schwibsi » Apr 08 2015 2:54am

@ quamau

The Klickfix Micro 200 can take 50 cells, but in my opinion the mounting adapter is too weak for 50 cells.
40 cells are a perfect fit for the Klickfix Micro SL, though. I use a couple of 13s3p (39 cells) packs myself and I've built a few 10s4p packs in the Micro SL aswell.

I would use 4p-5p from V3 cells for a continuous 20A draw. However, if you don't need the range, you could go with a 3p or even 2p pack on 25R or VTC5 cells. You'd save quite a bit of weight and money.

@ 206monkey32
You probably mean 7,5Ah-10Ah. @20C that would be 150-200A. For a brief moment the cells will deliver that much current but not continuously.
You could go with a 8s pack from 25R or VTC5 cells to get the highest possible current per weight.
As for the size, we can stay well within the limits. Around 300x150x20mm plus fuse holder and the wires.
No need for balancing on either one of those cells. They're both built to be used in power tools, where they take a lot of punishment and no balancers are used.

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okp   100 kW

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Re: Welding battery packs in Europe

Post by okp » Apr 20 2015 9:00am

hi schwibsi, are you still making packs? I sent you a PM :D thanks!

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moonshine   1 kW

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Re: Welding battery packs in Europe

Post by moonshine » Apr 23 2015 6:33am

I think he's making packs still, I'm waiting on my Samsung 25R pack. :lol:
Current Build: Vector, MXUS 4T in 19" moto, Max-E, 20s8p Samsung 25R http://endless-sphere.com/forums/viewto ... =6&t=67752

Torque Raptor, Cromo V3 in 19" prowheel, Kelly KBL96251, 24s4p (SOLD) http://endless-sphere.com/forums/viewto ... =9&t=56342
Giant DH Comp, X5404/Cromo V2 in 26" rim, Kelly KBL96251/Lyen 18fet, 24s4p (SOLD) http://endless-sphere.com/forums/viewto ... =6&t=40031

liamcaff   1 kW

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Re: Welding battery packs in Europe

Post by liamcaff » May 25 2015 9:36am

Hey Schwibsi,

Looking to put as large a battery as possible into a Vector frame. Want to leave room for an Adaptto Mini-E controller and charger too. Thinking about it being 48V... Open to any suggestions on cell type. The guy I'm building a bike for is hoping to cruise at 20mph for up to 60 miles.

Any thoughts? Considerations? Options? Cost?

Cheers,

L

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schwibsi   1 kW

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Re: Welding battery packs in Europe

Post by schwibsi » May 25 2015 9:40am

Hey Liam,

haven't heard from you in a while.
for that speed level, he won't need much current, so the Panasonic PF cells are probably the best buy (if he want's to go with the Adappto bms or check cell balance externally).
I don't have the measurements of that frame. If you send me a link or drawing to my email, I'll take a look.

liamcaff   1 kW

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Re: Welding battery packs in Europe

Post by liamcaff » May 25 2015 9:55am

Yeah long time!
Here are the dimensions for the Evel bike frame - as far as I know it is the same as the Vector frame.
evel bike frame.jpg
evel bike frame.jpg (24.73 KiB) Viewed 3567 times
So is there a need to balance the Panasonic PF cells? I'm more familiar with LIPO batteries so not sure of the details of managing Panasonic PF cells.

L

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schwibsi   1 kW

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Re: Welding battery packs in Europe

Post by schwibsi » May 25 2015 10:04am

No, I mean that if he uses the bms, then the PF cells are fine. They require balancing.
About the frame, that's huge. You could fit close to 400 cells in there. Unless he wants to tow a car for those 60 miles, I see no problem.
You're looking at the potential for around 85Ah in that frame, if we fill it up.

liamcaff   1 kW

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Re: Welding battery packs in Europe

Post by liamcaff » May 25 2015 10:16am

Yeah am happy to get the BMS from Adaptto to do the balancing so.

Am thinking 85Ah would be a 'bit' overkill but good to hear there's ample room available. I was thinking more like 40Ah maybe? The bike won't be towing a car but the guy himself is 171kgs! So if you think 40Ah would be enough to go 100kms what kind of money would we be talking for the battery built and shipped to Ireland?

I'm meeting the guy later this evening so even an estimated cost would do for now.

Cheers

L

quamau   1 W

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Re: Welding battery packs in Europe

Post by quamau » May 27 2015 11:06am

This is to give the community a feedback on the amazing service provided by this guy schwibsi (Andreas). I have just received my pack and I am extremely happy with it: perfectly done, and quickly, with utter attention to details. But what I enjoyed most in this experience is the way he handled the preliminary discussion leading to freezing the technical specs of the pack. In short.. thank you schwibsi from a very happy customer!

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Re: Welding battery packs in Europe

Post by camerart » May 30 2015 3:00am

Hi Schwibsi,

Thanks to 999zip999 I'm here!

I'm new to electric bikes, and have fitted all the electrics to a mountain bike (nothing special). I would like a 36V 15A battery pack, square shaped, to fit on a bike rack. I live in the UK.

I haven't read much of this post, but I'm sure you add balance connections, for balanced charging. I will also need a charger and BMS if they are separate, so advice will be welcome. (Shows what I know :D )

Will you PM me with the expected costs please.

Camerart.

999zip999   100 GW

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Re: Welding battery packs in Europe

Post by 999zip999 » May 30 2015 3:54pm

Camerart this your first pack and at a minimum I would have sense wires for a cellog. But I don't know how well you will do as your own BMS. But you need to know the state of charge and balance of your new pack. Plus always unplug when not in use. Everything live.

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Re: Welding battery packs in Europe

Post by camerart » May 30 2015 4:27pm

Hi 999,

Can you clarify "But I don't know how well you will do as your own BMS" please?

C.

999zip999   100 GW

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Re: Welding battery packs in Europe

Post by 999zip999 » May 31 2015 1:31pm

If you are your own BMS you have to marry your battery pack is more than a hobby it's a marriage with diapers.
Oh plus spoon feeding.
And a thermometer in its bum ( cellog ). Don't over charge or it Will have a bad tantrum.
It isn't that hard.
Hvc
Lvc

999zip999   100 GW

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Re: Welding battery packs in Europe

Post by 999zip999 » May 31 2015 11:09pm

BMS ( battery management system ).

danoussh   10 mW

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Re: Welding battery packs in Europe

Post by danoussh » Jun 09 2015 10:25am

Has anyone had recent news from Schwibsi?

I've not had any response from him since Tuesday 2nd June 2015.

I'm still waiting for my two 22s8p for my ebike additives bag v2 :)

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schwibsi   1 kW

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Re: Welding battery packs in Europe

Post by schwibsi » Jun 09 2015 10:36am

Your packs are finished.the chargers will arrive next week. We've had a death. I'll be back at work by the weekend. But it's not going to delay your shipment.

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Re: Welding battery packs in Europe

Post by danoussh » Jun 10 2015 1:55am

Andreas,

Very sorry for your loss.

Thanks for the update.

Best regards,
Danoussh

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rojitor   100 kW

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Re: Welding battery packs in Europe

Post by rojitor » Jul 02 2015 4:06pm

Pm sent. Let me know.

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Callumrexreid   10 mW

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Re: Welding battery packs in Europe

Post by Callumrexreid » Jul 05 2015 12:49pm

Hi Schwibsi.
Sorry to hear of your loss.
Are you still open for business? If so...
I will be running a TC80 and need abttery, BMS, controller and charger to get my build to the next level.
I will probably loook to draw max 2-3kw power (with 6kw burst?)
Was thinking of a 72v 20AH pack or 72v 40AH pack...
Your reviews and your proximity make you a seller that is ideal for me. (I am in the UK, and you are in Germany)
Please PM me when you ge a chance with prices etc..
Thank you for your time.
Best

Cal
Man is always outside of himself ; it is through projection and losing himself outside of himself that man exists.
'Sartre'
Current Build http://endless-sphere.com/forums/viewto ... =6&t=56803

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