Sinopoly Cells - Info -

[Burgerman]

Keep It Simple Stupid... KISS

Every engineer knows it.

[biscuit]

Lol lucky engineers aim for that... Nothing they do is simple for the rest of us poor mortals.

[woodygb]

[Burgerman]

Thats not a failing of the engineering.

For eg I get DOZENS of emails wanting lithium without the thinking part. Sorry but its not possible. At least not if you want the reliability, range benefits and cost benefit possible. Otherwise yes, theres lots of plug and play solutions. That wont offer you any of the above!

Not everything can be dumbed down to the easy plug and play solution everyone wants.

[hobie1dog]

These 100AH cells seem too big. The cells below have better sizes which can fit 16 in a powerchair.

80AH ALT cell
http://lifepo4.vn/product/pin-atl-3-2v80ah-moi/

80AH Coslight cell (86AH claimed)
http://lifepo4.vn/product/pin-lithium-s ... u-xe-dien/

90AH EVE cell (92AH claimed)
http://lifepo4.vn/product/pin-eve-lf-3- ... le-dod-80/

They are all showed on taobao. The prices are just a little higher than taobao. Maybe the seller imported them by huge load. They also offer building packs (with BMS) for free.

16 of those 90Ah cells (conversion to us dollars of $40.88 each) would be about $656.00 for a 180 Ah pack. Pretty simple layout with all the terminals on top, I like this.

[shirley_hkg]

@Shirley, are there any 75Ah+ (10C) cells with the following dimensions...

Height 170mm
Length 197mm
Width 40mm max

Those 90Ah cell would fit perfectly if they were 30mm shorter height wise!

Steve

I think so .

Its been quite some time now , since I spotted it , and the better ones usually went first .

I might get 16 LF90 , because I know the seller well . He shall response if the batteries have problems .

[hobie1dog]

These Sinopoly's are interesting. Would be a lot simpler to convert a chair to lithium with eight of these vs. assembling dozens of Headway cells into a pack ect.

Who's going to be the guinea pig?

8 batteries, especially ones like the 200Ah models would be a build thread I would subscribe to.
https://www.ev-power.eu/Sinopoly-40Ah-3 ... 200Ah.html

Is there a way to subscribe to a thread and get email notifications everytime a post is made?

[Burgerman]

I think so. Not sure how though. I get a different page to the rest of you...

Do you see any of these tickboxes:
Disable BBCode
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Attach a signature (signatures can be altered via the UCP)
Notify me when a reply is posted
Lock topic

When you scroll down or at least': Notify me when a reply is posted

[foghornleghorn]

Is there a way to subscribe to a thread and get email notifications everytime a post is made?

Post in the thread and tick this box before you submit.

[steves1977uk]

@Shirley, are there any 75Ah+ (10C) cells with the following dimensions...

Height 170mm
Length 197mm
Width 40mm max

Those 90Ah cell would fit perfectly if they were 30mm shorter height wise!

Steve

I think so .

Its been quite some time now , since I spotted it , and the better ones usually went first .

I might get 16 LF90 , because I know the seller well . He shall response if the batteries have problems .

http://en.evebattery.com/product/40.html Those 140Ah cells are nearly perfect except they're 8mm too wide! Pity there isn't 120Ah cells that are 38mm wide.

Steve

[shirley_hkg]

Dimensions of your battery space
?

[hobie1dog]

Yep, checked the box- Notify me when a reply is posted.

Thanks

[steves1977uk]

Dimensions of your battery space
?

Originally I can fit two of these batteries side by side with a few mm to spare all round... https://www.mobilitybatterystore.co.uk/ ... m-battery/

Now I have a 8S5P pack in the same space giving me a 75Ah pack using 15Ah Headway cells. So I was just wondering if I could squeeze in more Ah using those EVE-LF cells.

Steve

[hobie1dog]

Yep, checked the box- Notify me when a reply is posted.

Thanks

I also just saw the other place to click on to subscribe to the topic, bottom LH corner of each page.

[hobie1dog]

True. And not even a BMS fitted. So it is not going to last long!

Also, https://www.jypwr.com/shop/lithium-agm- ... /ft825-34/

Is a PC1500 Odyssey in disguise with a bit of fancy marketing. Thats the same as the old Die-hard one. Its got the Odyssey 2.5mOhm, and other specs, and so its internals. They like their wizzy marketing these ICE fans!

I am getting a price from them on the PC1500 copies, and I will let you know what they come back with.

[snaker]

This CATL cell size might be the best for a GP24 box.
95Ah nominal (100Ah claimed)
LxWxH = 173mm x 29mm x 203mm
http://lifepo4.vn/product/pin-lithium-s ... 00ah-catl/

[Burgerman]

Yes that SHOULD fit. 16 cells. But how much and how much shipping, and are they really any good?

Theres no way to tell...

[snaker]

This company just imports lifepo4 cells from China. Maybe they import by huge loads so they can offer good prices. That 95Ah cell costs $47 for each. Shipping cost (inside VN) is just a couple of dollars and it takes 3-5 days. They said their prices include 1 year warranty and VAT (not sure if applying for cells or just full packs). "Warranty and VAT" is a sign that they are doing a honest business.

These cells are just a suggestion. Anyone who is interested in them should ask Shirley first. He knows reliable sources and can help in buying and shipping.

[shirley_hkg]

There terminals are meant for spot-welding. I think seller made the threads on their own, depth usually ≤ 5mm. Very shallow .

$35.00 taobao price .

[steves1977uk]

@Shirley,

Exact battery box dimensions are:-

Height 215mm
Length 240mm
Width 370mm

So those 90Ah cells would fit with no problem.

Steve

[Gnomatic]

Those cells look good but 174mm * 2 wide is really would be very tough to fit in my particular chair. The LF90's posted earlier would be easier to work with in this particular case.

[sacharlie]

Lithium likes it in the middle, where its got 30 to 70% charge, and where all charge and discharge currents are low. Then they last for decades and dont deteriorate noticibly. But at the same time you do have to use them! Its all about understanding this, and using them and planning accordingly.

"But at the same time you do have to use them!"

What is the msg in that statement?

[Burgerman]

I mean that most of the time I try to charge slowly, maybe 120Ah pack at 20A. And I try to keep it above the 30% remaining mark. And I charge at a slower to balance 3.500V.

But if its low, and real life means I dont have time and in a hurry I charge at 40A. Or more direct from a power supply. (can do 80A).

If I am in a hurry to end charge, and balance cells, I use 3.65V. If I am out on a long day, or forgot to charge the day before or something, I will run it to 90 or 95 percent discharged. You gotta do what you gotta do! All this is ok too if you accept that its less kind and will shorten service life some. Sometimes thats less important than your own life.

[sacharlie]

OK. I thought you meant they deteriorate over time if not used.

[steves1977uk]

These look interesting... http://www.lifepo4-batteries.com/sale-1 ... -cars.html

Steve

[Burgerman]

Tru. But 8 of these will/should fit as 2 rows of 4. http://www.lifepo4-batteries.com/sale-1 ... f-car.html

That will give roughly 4.4 times the range of MK at the 5 hour rate.

So if your chair claims 30 ISO miles, as mine does, you will get 132 miles with these...

Reality will be around 2/3rd of that OR more since these keep working to empty. So about 90 miles or better. Thats just crap...

[expresso]

Tru. But 8 of these will/should fit as 2 rows of 4. http://www.lifepo4-batteries.com/sale-1 ... f-car.html

That will give roughly 4.4 times the range of an MK at the 5 hour rate. So if your chair claims 30 miles, as mine does, you will get 132 miles with these...

this would be the way to go - i think using 8 Cells - largest you can fit - but good luck trying to get them to fit - comes out short on my end - IN My Chair - those would be a bit too large to fit 8 side by side - the max on my battery tray is around 330mm to wrap it also -

i have a loose cell here - 36mm x 130mm x 190mm - i checked it in my battery tray that MK group 24 sit in - and it didnt fit - side by side if using 16 cells - and didnt fit the other way either if wanting to use 16 Cells - i know the specs on paper shows it SHOULD fit - but it dosnt on my chair - 646 battery tray -

it may on other chairs - i like the idea of a Large 150ah Cell and fit 8 of them -

[Burgerman]

How much doesent it fit by?

The grp24 spec says 173 x 260 x all kinds of heights up to 240.

[expresso]

the height if fine - but the 130mm x 130mm for two cells to fit side by side - doesnt fit in my battery tray for my chair - 636 - 646 models

thats without the wrapping either - i will check it again when i have more loose cells to try it with - this is the same chair that didnt fit the PC 1500 lead either - not by much but still didnt fit in this chair -

it may fit other chairs fine - forget the PC 1500 - the lithium cells that are 130mm wide wont fit in the battery tray - Now if you dont use the tray that maybe may fit but you still need something to support it the sides etc, and the wrapping -

for me i wouldnt feel comfortable trying to make it fit - the 636 646 chair battery area is very fitted like an Armani suit - no room to spare

i will take pictures once i get loose cells - and check it again - its strange but its very minor enough not to make it fit - i even checked it near a loose MK Gel i have on a dolly and its very close but a bit larger overall - the width - that is side by side

[expresso]

How much doesent it fit by?

The grp24 spec says 173 x 260 x all kinds of heights up to 240.

i show 259mm x 167mm for MK Gel specs size - up to 235mm height - for one Battery