Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

General Discussion about electric bicycles.
jcool3   100 mW

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Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by jcool3 » Mar 04 2018 11:54am

4 SPIM08HP 3.7V 8AH LITHIUM POLYMER BATTERIES 25C 200A SUPER CELLS 24V 36V 48V
on ebay https://www.ebay.com/itm/183036786061?rmvSB=true
Cost about $10 each. 10 in series would make 37V battery for ebike.
Sounds like a pretty good deal. jehugarcia has a video 200A LiPOs on a DIY Electric Skateboard build
but he discuss charging.

My questions is what to use for a charger and would they need to be balanced charged?
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Drunkskunk   100 GW

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by Drunkskunk » Mar 04 2018 10:12pm

I have little trust in generic discount Lipo cells. They are dangerous enough when sourced from a known brand. In my head, I associate the term "Discount Lipo" with terms like "Discount Condoms", or "Discount Parachute." It just doesn't seem like a good idea.

Charging lipo should be done one of two ways. One is with a balance charger, that charges each cell individually. The other is with a bulk charger through a BMS, that handles monitoring the cell balance.
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motomech   1 GW

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by motomech » Mar 04 2018 11:02pm

jcool3 wrote:
Mar 04 2018 11:54am
4 SPIM08HP 3.7V 8AH LITHIUM POLYMER BATTERIES 25C 200A SUPER CELLS 24V 36V 48V
on ebay https://www.ebay.com/itm/183036786061?rmvSB=true
Cost about $10 each. 10 in series would make 37V battery for ebike.
Sounds like a pretty good deal. jehugarcia has a video 200A LiPOs on a DIY Electric Skateboard build
but he discuss charging.

My questions is what to use for a charger and would they need to be balanced charged?
I've been looking at those cells for a while and I'm not concerned w/ their quality. Appearently, they were used in a prototype bus and have few cycles on them. That, and the seller is well known
and respected in the DIY battery community.
The reason I passed on them is because they are way over-kill for my Ebikes and for yours too. If you were an expert building a high discharge system, they would be worth considering.
And since you are asking if LiPoly cells need to be balanced, well, they are not for you.
Look at their 36V Powerwall-celled Li-Ion packs that already have a BMS built in . Although they are listed as used cells, they are new according to Combat Engineer who reviewed them on Youtube. He thinks they are fantastic.
Motomech


'07 GT Idive 4 4.0, Q100H 201 frt. mounted, 14S Multistar LiPoly, elifebike 9-FET 20A controller. Mean Well HLG-320H-54A, Crazy Bobs on Alex DM32's 21 to 22 MPH. viewtopic.php?f=3&t=28151&p=1373714&hilit=Idrive#p13737

jcool3   100 mW

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by jcool3 » Mar 05 2018 12:19am

motomech wrote:
Mar 04 2018 11:02pm
jcool3 wrote:
Mar 04 2018 11:54am
4 SPIM08HP 3.7V 8AH LITHIUM POLYMER BATTERIES 25C 200A SUPER CELLS 24V 36V 48V
on ebay https://www.ebay.com/itm/183036786061?rmvSB=true
Cost about $10 each. 10 in series would make 37V battery for ebike.
Sounds like a pretty good deal. jehugarcia has a video 200A LiPOs on a DIY Electric Skateboard build
but he discuss charging.

My questions is what to use for a charger and would they need to be balanced charged?
I've been looking at those cells for a while and I'm not concerned w/ their quality. Appearently, they were used in a prototype bus and have few cycles on them. That, and the seller is well known
and respected in the DIY battery community.
The reason I passed on them is because they are way over-kill for my Ebikes and for yours too. If you were an expert building a high discharge system, they would be worth considering.
And since you are asking if LiPoly cells need to be balanced, well, they are not for you.
Look at their 36V Powerwall-celled Li-Ion packs that already have a BMS built in . Although they are listed as used cells, they are new according to Combat Engineer who reviewed them on Youtube. He thinks they are fantastic.
Are your Powerwall-celled Li-Ion packs the Lg 36v packs? They are long sold out gone. I have 3 of those lg/Samsung on my Ebike. Was looking for a backup battery system.

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by MileHighGuy » May 06 2018 2:51pm

Did anyone ever get some of these and try them on their ebike? I think I'm going to say screw it and order myself 16 of these 4cell packs to make a 20S 3P 72v24Ah pack for my build that has a QS 205 50H with a PV F24150 12kW controller that can take 150a battery current and put out 300a phase current and can be dialed down as I see fit. This is my best option for my budget. My build is just a paperweight without a battery and I've had it finished for going on 2 months and my diy laptop battery project is no where close to what this set up needs to run. If there are any other suggestions I'm open to them but for $550 I highly doubt anything is out there that can meet this

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MadRhino   100 GW

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by MadRhino » May 06 2018 4:55pm

I use 8Ah lipo cells, 30-50c Zippy from Hobby king. They were at a good price, free shipping, arrived in 2 weeks. I got the first from a friend, liked them and ordered more from Hobbyking. They are true spec, didn’t swell much, 500 cycles done.

I don’t see any advantage buying them used and lower spec at 10$, when you can have them new and assembled in bricks for 1 or 2$ more, shipping included.
Make it fool-proof, and I will make a better fool.
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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by Gorhams » May 06 2018 7:49pm

I used these for a 12s pack. I have a few cycles on the pack so far and they seem to be working great. Most of the cells capacity tested over 9ah. All the info I found about them suggest that the cells are 3.6v lithium-ion manganese chemistry.

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michaelkramer11   100 mW

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by michaelkramer11 » Sep 06 2018 10:45pm

How did you attach wires to these cells/the cells to eachother? Did soldering work normally? Hardware (nuts/bolts)? Spot welding? They're way cheaper than buying any new lipo packs and I'm just wondering how tough they are to actually make into a pack.
wal mart "next" brand bicycle, yescom rear 1000w kit, 16s15ah turnigy lipo's, greentime 72v45amp controller

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by 999zip999 » May 20 2020 8:18pm

Who has use these cells ?

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by pullin-gs » May 20 2020 10:20pm

I've been using them for over two years now.
Built a 3S3P pack for my e-kayak.
an 11S and 12S for my two etrike projects.
I find them very reliable and as safe as any quality LIPO pouch cell.
https://www.youtube.com/watch?v=mD_mHqUxeXw&t=102s

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by 999zip999 » May 20 2020 10:44pm

How tall are the taps ? I'm thinking of 20s2p probably best as two 10s2p for fast charging . So be high quality automotive cells. Now to make a mock up

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by DogDipstick » May 20 2020 11:38pm

999zip999 wrote:
May 20 2020 10:44pm
How tall are the taps ? I'm thinking of 20s2p probably best as two 10s2p for fast charging . So be high quality automotive cells. Now to make a mock up
I can tell ya iun the morning. Tom gave me 24 of them to play with. Good numbers from the current batch. I'll update this with a edit with X-Y-Z dimensions, Zip, also tab thicknesses. They have very thick tabs.
83.1v of Ironhorse XC.. :) :bolt: by Chevy :bolt: :D Broke 10 horsies :twisted: (..about 80% healed..).. :? Anybody.. what equals √3 times the line to neutral voltage? Asking for a friend.. :| (gottenymoem4115thangs?Yall?) :confused: Fabricator @ BSECo. Inc.

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by 999zip999 » May 21 2020 1:16am

I got a little excited 20s2p is 40 cells to for a large triangle. Gotta make some much up for shear.
Thanks dogdipstick I can wait. As I might have to pay for a 18650 triangle pack.

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by DogDipstick » May 21 2020 1:25am

999zip999 wrote:
May 21 2020 1:16am
I got a little excited 20s2p is 40 cells to for a large triangle. Gotta make some much up for shear.
Thanks dogdipstick I can wait. As I might have to pay for a 18650 triangle pack.
Yeah thats the problem Im running into all the time.. the bulk. yes these are gonna take up a bit with 40 cells.... but they are relativly thin and like I said.. the tabs are thick and bolt-able.
83.1v of Ironhorse XC.. :) :bolt: by Chevy :bolt: :D Broke 10 horsies :twisted: (..about 80% healed..).. :? Anybody.. what equals √3 times the line to neutral voltage? Asking for a friend.. :| (gottenymoem4115thangs?Yall?) :confused: Fabricator @ BSECo. Inc.

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by john61ct » May 21 2020 11:13am

EV-class, excellent!

Anyone know who actually makes these SPIM08HP?

second-hand, gotta really trust the source. . .


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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by pullin-gs » May 21 2020 12:47pm

Cell tabs are VERY heavy. Made for quick builds of my 10S, 11S, and 12S packs
viewtopic.php?f=14&t=104415&p=1525666&h ... s#p1525666

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by 999zip999 » May 21 2020 10:54pm

I bolted my A123 20ah pouch cells 6 years ago and still running strong

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by 999zip999 » May 22 2020 10:42am

I'm on a trail to something. I found these cells at battery hookup in USA in there they had a video YouTube that showed this guy who invented a holder for 20s his name is Mike Poff. I don't know how to get ahold of him or how to find them I looked on Facebook but there's a bunch of them. Maybe somebody knows of him orkin tell me how to find him.

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by HK12K » May 22 2020 11:47am

Hobbyking is on my last nerve. I might just have to cancel and order 40Ah of these instead.

Wonder if they'd use anyone aside from FedEx for shipping. FedEx might be a dealbreaker.

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by MadRhino » May 22 2020 12:33pm

All shipping from China is very long right now. Orders from February are just starting to arrive. Even shipping US to Canada is long, I’ve been waiting 5 weeks for common fletching parts that usually come within a week. Not a good time to buy RC lipo at Hobbyking for both, price and delays.
Make it fool-proof, and I will make a better fool.
Current bikes
Street:
Trek Session 10 mod. Variable geometry. 70mph
Dirt:
Santa Cruz V10. 50mph

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by john61ct » May 22 2020 1:56pm

And I'd be very wary of using USPS for anything longer than a week or two out.

Very possible the US administration's conflict with them will cause additional chaos, especially as we get closer to November.

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by HK12K » May 22 2020 2:39pm

The Ebay ad lists them as located in Pennsylvania. I'd be fine with USPS for that, under normal circumstances anyway. Right now at this moment however any shipping option is a crap-shoot.

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by 999zip999 » May 22 2020 4:04pm

O.K. bitches I pulled the trigger ! And one box of new 36cells and four more that may be new. All this for 196.40 usd I think that's with 20.00usd shipping. The 36 are new in one box. Four from an open box all with holders ? That snap together ? Wish me luck I'm going in.

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Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

Post by 999zip999 » May 23 2020 2:14pm

I was just following this thread but I will follow up here and let you know when the batteries here I and what's going on what shape but they seem too cheap to be true which is I don't know. But there's some reason there's a ton of these to be sold new and used

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