Sinopoly Cells - Info -

[Gnomatic]

what does that come out to in US prices - then adding shipping etc,

Assuming the shipping charges to US aren't much different than UK, it works out to roughly $920 to your door in USD. That included 8 cells, shipping, and the hazard charge.

[expresso]

what does that come out to in US prices - then adding shipping etc,

Assuming the shipping charges to US aren't much different than UK, it works out to roughly $920 to your door in USD. That included 8 cells, shipping, and the hazard charge.

thanks - thats a good price if the cells are new and they fit in the same space once packed and wrapped etc, - 170Ah - that would be amazing to fit inside - i wont need a ADD ON then

from the looks of things - i will end up having to do any new chair i get - if i even get a chair

[Gnomatic]

It would be possible to fit 4 into an empty grp24 shell... And make a "battery"... Those are available too.

BM, do you know where these empty grp24 shells can be purchased? I can think of a couple uses for them.

[Burgerman]

I used to get all kinds of battery manufacturer spam. Since I sold batteries online. I remember some for empty battery shells, with lids not yet applied. They had 6 internal walls that would need removing. With a dremmel or similar. But no longer have these. So cant easily find now.

[foghornleghorn]

1. Does anyone know how durable something which has been 3D printed is? Wondering whether it would be possible to design and print a case with 4 slots the cells would fit in snugly.

2. Completely opposite to that, do the cells get hot in use and would they not really enjoy being fully enclosed? Just concerned as I have broken down before due to overheated electrics.

I used to get all kinds of battery manufacturer spam. Since I sold batteries online. I remember some for empty battery shells, with lids not yet applied. They had 6 internal walls that would need removing. With a dremmel or similar. But no longer have these. So cant easily find now.

The only empty shells I have seen were in a classic car magazine designed to hide a new battery in a period looking case to keep the concourse originality fusspots happy. They weren't cheap.

[expresso]

https://www.simcobox.com/plastic-projec ... er_page=50

this place may have something or maybe can have it custom cut to size -

[Burgerman]

2. Completely opposite to that, do the cells get hot in use and would they not really enjoy being fully enclosed? Just concerned as I have broken down before due to overheated electrics.

Not unless used at high currents. But it will reduce the C rating a little. Thats one reason the headway cells are higher C rated than prismatics. Metal cases and lots of surface area and airflow gaps.

[shirley_hkg]

£10

[Burgerman]

Yes those. But we need grp24 size.

260L x 174W x 220 to 240 tall.

[shirley_hkg]

Found these good cells , and good price .. Reviews from buyers are ALL positive .

0.3mΩ rated @5C . 75Ah@£20.

May fit 16 of them in a G24 space .

Hurry , while stock last .

[Burgerman]

How old?
New or used?
How much for 16 with shipping?

Still think these are better. download/file.php?id=8172&mode=view

[shirley_hkg]

Claimed to be new old stock .

Shipping rate as mentioned previously .


Those are gone .

User's review below , has lower IR than that of the 170Ah ones .

[Gnomatic]

What are your thoughts on these, shirley?

https://item.taobao.com/item.htm?id=540 ... oSite=main

[shirley_hkg]

Will work.

IR is higher than mine , and you can't fit 16 of them . Only 2 reviews so far .

Enough room to fit a 2P9S pack into a G24 space . Any good ?

[Burgerman]

2P9S

?

[shirley_hkg]

Higher volt .

[Gnomatic]

Well, I'd like 16 of those cells or similar, but want to first find a metal box I can fit them in.(after box has been insulated) I can make fit.

[expresso]

i may also be interested in those cells or similar which have to fit in a group 24 size battery box with no modifications - that would give me 150ah ?

how would the connectors work - do they sell connectors etc, screws everything thats needed ?

As long as they fit in a group 24 battery box - i cant do modifications to that battery box area -

thanks -

[shirley_hkg]

Well, I'd like 16 of those cells or similar, but want to first find a metal box I can fit them in.(after box has been insulated) I can make fit.

We always have tailor-made SS boxes.

Its easy to get things done here.

https://www.wheelchairdriver.com/board/ ... 66#p118266

[snaker]

It's hard to find a built-in box that fits our needs. The easiest way is asking a local shop who sells inox sheets (rolls?) do it for you. Mine is 1.5mm thick and costs $20 (material and labor). 1.5mm is already very sturdy and bulletproof

[expresso]

https://www.aliexpress.com/item/8Pcs-Lo ... autifyAB=0


seems to be very similar to the sinopoly - just less expensive - with free shipping - wonder if they are all the same just different brand

[Gnomatic]

They do look similar.

[Gnomatic]

Their specs are identical to Sinopoly.



Also, if you want to see how Sinopoly's hold up in sub-optimal conditions .......


youtu.be/aQs7L5LmEss

[Burgerman]

Well thats EXACTLY how I treat my battery every day. So thanks for that!

Seriously, its well known that unlike Laptop / tesla style LiCo, or LiPo hobby type batteries, which burn and explode, ours just dont.

LiFePO4 we use will only burn if you can heat them up with additional external heating like a flame, adequately enough to boil the oily electrolyte out of the cell. And give a source of ignition. Much like hot cooking oil. Thats actually safer than lead which produces hydrogen and oxygen and can blow up violently while spitting sulfuric acid in your face. Although the smoke smells pretty bad. Thats why we are using them. Before committing myself to them I made damned sure!

I have however accidentally had lipo batteries explode or flare up violently in hobby stuff for no apparent reason. Several times. Other than what seems like normal use. Dont trust those things one bit! There are just 2 in my house where I can see them. The rest are in an old fridge in my garage. And at my flying field we destroy old ones in a ritual with a nail before going home for fun.

[Dan]

￡1,213.90 for two, is anyone tempted? I will have to check to see if two will fit a Storm 4.

[Burgerman]

How did you get that price?

https://www.aliexpress.com/item/8Pcs-Lo ... autifyAB=0

£618 delivered for eight. And thats all you need.

The price of lithium continues to fall.
Thats for 100Ah. More than 2x the Ah you get from a pair of MK batteries, Which will only allow about half the 73Ah. Say 40 to 45Ah to be used at the high rates we use them. So price per usable Ah is already much less Because realistically thats the same as buying four MKs for range. That would cost £850!

And its better yet again, since these will last around 2000 cycles, or much better, instead of 500 at very best. Because if you only use the same range most days as before, they will give around 5000+ cycles, as you will only need to replace under 50 percent. Thats 10x more cycles. Or allow a charge every 2 or 3 days in winter.

[Dan]

Can't see how I missed its 8 for ￡618

Battery Dimension:221*142*61(+/-1mm)

Would that be at least 22.1cm tall 28.5cm wide 24.5 deep for both side by side.

[Burgerman]

Yep. Be sure you have the height you need.

[Gnomatic]

Well thats EXACTLY how I treat my battery every day. So thanks for that!

I thought that vid made a strong case for LiFePO4 given the torture. You can look up youtube videos on lead acid batteries being abused and see more smoke fire etc. Which is a point you've been making for many years.

[Burgerman]

Yes, it does. I was joking! I actually sawed a fully charged headway in half. Some smoke. Still worked.