Cell Wrapping

[expresso]

lately alot of Cells are being wrapped in Rice Cake and Silicone sheet between each cell -

i will be doing another Add on and like to wrap them also etc, - would anyone know or have links to silicone sheets - wraps etc, that would work - i been searching but if find small sizes for alot of money - not sure how much i would need to add to 8 60ah Cells - i like to add in between and around -

would 0.5MM work - enough to be safe ? or do i need 1mm - trying not to make it too bulky - i also find some that are sticky on one side - is that the kind to use or some other special kind ?

https://www.ebay.com/itm/US-Stock-1mm-x ... 0016!US!-1

https://www.ebay.com/itm/NEW-Silicone-R ... 0005.m1851

https://smile.amazon.com/Translucent-Hi ... cone+sheet

https://smile.amazon.com/Silicone-Rubbe ... cone+sheet

Would it be better to have it with backing to stick on the cell or with out backing - in case it needs to be removed etc, - expecting my Cells to arrive next week -

any better ideas - suggestions - links to items etc,

thanks

[Burgerman]

1mm safer?

[expresso]

ok 1mm then - do i need the sticky back kind - or better off without it in case you need to remove later ?

i have no idea what i am going to receive - if i will get hardware screw nuts connectors - all unsure - first time ordering from Aliexpress - so far its going OK - i also got tires - but the Cells - were shipped UPS - which is great much faster, i wasnt expecting them till end not next month but the bumped up the shipping and didnt cost me any extra

cross fingers -

Ok so 1mm sheet - glued back kind or without ?

this rice cake wrapping thing - would this be good to use ?

https://smile.amazon.com/dp/B019N0OMI8/ ... _lig_dp_it

https://smile.amazon.com/dp/B019N0OMII/ ... _lig_dp_it

then tape it up - should be safe after that ?

Should i wrap all around the Cells sides bottom top with the silicone also or just in between is fine ?

i get the feeling this will take some time to do plus i may need to make connectors - will use Wiring and lugs if i have to -

[Burgerman]

All depends how you do it. I will use 1mm rigid plastic sheet, and double sided tape. And 2mm on the bottom.

[expresso]

All depends how you do it. I will use 1mm rigid plastic sheet, and double sided tape. And 2mm on the bottom.

i dont have a lot of room - its going to barely fit in my Shoe box its going in

the links i posted - - are they not good enough ?

Are the Rigid sheets cut able with a Scissor ? i would have to cut to size - - with kitchen scissors - -

i visioned - the silicone i linked - in between and all around - then the large sheet of heat resit. Tape i guess all around etc, and sit in the plastic box

thats if i get connectors and they reach each other after adding in the extra material - i want to make sure its safe first thing -

[Burgerman]

As long as no casing can touch the chair or each other, after 5 years of vibration and curb jumping then its good however its done. A perfect 1mm plastic moulded holder would be great. Surprised they dont come with one!

[expresso]

Ok i cant seem to find 1mm - we got inches here - so keeps showing up mostly inches -

i think this is close - about 1.5mm thick

https://www.amazon.com/dp/B016PESTJS/?c ... _lig_dp_it

it will be in a Plastic Shoe Box - and the box in a Canvas bag - so wont touch the chair thats for sure - they should come with a covering already but i wont trust that alone -

either the soft silicone i posted before or this link above - add in between each cell - if i have space room - i add it all around etc but will wrap it all around with the other Tape that looks like a rice cake wrap

https://www.amazon.com/dp/B019N0OMI8/?c ... _lig_dp_it

if you have any links to items that i can use instead if you think its better etc, but in the US - cant find the same things you find in the UK ebay as i do here

https://smile.amazon.com/XFasten-Double ... l_huc_item

double sided tape - these should be good ?

[Furio]

Hi expresso,

You can use the fiber reinforced adhesive tape:

https://www.amazon.com/Self-Adhesive-Fi ... glass+tape

https://www.amazon.com/SuperiorBilt-Fib ... glass+tape

There are so many.

For 1mm and above thickness silicone sheets:

https://us.misumi-ec.com/vona2/detail/221000607042/

https://www.professionalplastics.com/Si ... ranslucent

Again there are plenty .

furio

[expresso]

Hi expresso,

You can use the fiber reinforced adhesive tape:

https://www.amazon.com/Self-Adhesive-Fi ... glass+tape

https://www.amazon.com/SuperiorBilt-Fib ... glass+tape

There are so many.

For 1mm and above thickness silicone sheets:

https://us.misumi-ec.com/vona2/detail/221000607042/

https://www.professionalplastics.com/Si ... ranslucent

Again there are plenty .

furio

thanks for the links - the tape is good - but those sheets - i checked they want $43 dollars a sheet for 1 mm x 200mm - not sure i need 200mm - but i will need enough -


https://www.professionalplastics.com/PL ... T-EXTRUDED this site may be better with costs - i will try it when i decide on the correct sizes i need but still $20 for a 12 x 12 sheet of plexiglass -

[snaker]

@expresso: if you need plastic sheets to isolate cells, I recommend using amiang. It is super cheap but super durable. It does not burn, it can be resistant to very high temperature and high voltage. Its downside is that it is not good for heath. But it lies inside the box all time. That might not be a big problem.

I bought this amiang sheet for just $5. Its size is 1.4m x 1.0m, its thickness is 0.5mm. And it is already solid like bulletproof (you will not need thicker). If your box is made of metal, you can also stick amiang sheet inside for electrical isolation.

And the silicone sheets I bought are not as expressive as your links above. I bought 2 sheets 0.5mm and 1mm, each is 1mx1m. As I remember, the 0.5mm was $15, the thicker 1mm was cheaper, around $10. I finally used the 0.5mm because it was already solid enough and saved some space. But 1mm would be still fine too.

[foghornleghorn]

amiang = asbestos

no idea about america but in europe you won't be allowed to use it.

[Burgerman]

Allowed by who?
I have asbestos cloth used for pipe lagging, and asbestos fire blanket for over a exploding clutch part of a drag car on my bench. Who is going to stop me using those?

An envoiron-mentalist?

Also.

USA - Is it still legal to use asbestos?
Although asbestos is no longer mined in the U.S. and its use has declined significantly, American industry still legally imports, uses and sells both raw asbestos and products made with it. ... Many Americans mistakenly believe that asbestos was banned decades ago.

UK - In 1973, under the EPA's Clean Air Act, most spray-applied asbestos products were banned for fireproofing and insulating purposes. And in 1989, the EPA issued the Asbestos Ban and Phase Out Rule, which hoped to impose a full ban on the manufacturing, importation, processing and sale of asbestos-containing products.17 Sep 2012

But its not illegal. And theres lots of it still about. Just banned from sale.

[foghornleghorn]

Not an envoiron-mentalist but a safety elf.

Ok then. You can't buy it, but can use it if you can find some in a skip, and have got a spare pair of lungs in your fridge.

[Burgerman]

When younger I did brakes, airline... Asbestos roofs and used power saws to cut sheets. Lagged boiler room pipes with the stuff. Not dead yet. And I am likely to live 5 or 10 years yet. So while theres a risk, its blown out of all proportion. But really, its all over the place. And in most countries not banned. Its just in places like here where everybody is a safety nazi. But best avoided if theres a better alternative.

[shirley_hkg]

How about this . Used in making PCB.
Don't know what's it called .
Cheap, very tough , and cut to order .

Most battery guys use it .

[expresso]

@expresso: if you need plastic sheets to isolate cells, I recommend using amiang. It is super cheap but super durable. It does not burn, it can be resistant to very high temperature and high voltage. Its downside is that it is not good for heath. But it lies inside the box all time. That might not be a big problem.

I bought this amiang sheet for just $5. Its size is 1.4m x 1.0m, its thickness is 0.5mm. And it is already solid like bulletproof (you will not need thicker). If your box is made of metal, you can also stick amiang sheet inside for electrical isolation.

And the silicone sheets I bought are not as expressive as your links above. I bought 2 sheets 0.5mm and 1mm, each is 1mx1m. As I remember, the 0.5mm was $15, the thicker 1mm was cheaper, around $10. I finally used the 0.5mm because it was already solid enough and saved some space. But 1mm would be still fine too.

IMG_20180626_162335.jpg

thanks for the suggestions - i should get getting them tomorrow - they should arrive already with the thin blue wrapping they use - which is not enough for me - silicone 1mm sheets i can find easy and not too much money either - if i cut it to size double tape it on each cell back - should be good i think - ?

[Burgerman]

Dont be tempted to put your tongue on the terminals.

Just charge each. Then remove say, 20% of the charge from each.

[LROBBINS]

Most printed circuit boards are made with FR4 flame-retardant glass-epoxy laminate. Very tough stuff, and an excellent insulator, even in thin sizes. Thinnest common size is 0.6 mm, and price is low from there up to 1.6 mm thick. Thicker than this and the cost skyrockets. I would think that the 0.6 mm would be more than enough. Cut by scoring with a laminate cutting knife and then flexing to break it - using a saw or dremel is not as neat and fiberglass dust is not a good thing to breathe. Of course, if you have access to a metal-cutting type shear, that's the quickest and neatest way to cut the stuff.

[expresso]

Dont be tempted to put your tongue on the terminals.

Just charge each. Then remove say, 20% of the charge from each.

Why remove some after a charge - just to not let it sit full till i put them together ? or some other reason

[Burgerman]

Because if you plan to keep them full for more than a day or two, then they suffer.

They like to be half charged. Or a bit more. They dont much mind being at 30 to 70% charged. Long term. They will tolerate 80% for months on end.

Its a bit like breathing. Breath in with a maximum full breath. You are fully charged, but uncomfortable. You would rather breath out a bit! Esp after a while waiting. Same when you empty your lungs. Its not pleasant. The lithiums feel the same! Its why they are never shipped fully charged.

[expresso]

Most printed circuit boards are made with FR4 flame-retardant glass-epoxy laminate. Very tough stuff, and an excellent insulator, even in thin sizes. Thinnest common size is 0.6 mm, and price is low from there up to 1.6 mm thick. Thicker than this and the cost skyrockets. I would think that the 0.6 mm would be more than enough. Cut by scoring with a laminate cutting knife and then flexing to break it - using a saw or dremel is not as neat and fiberglass dust is not a good thing to breathe. Of course, if you have access to a metal-cutting type shear, that's the quickest and neatest way to cut the stuff.

thanks - this is getting more complicated now - the easiest thing for me is to just use silicone sheets - i can cut it easy - with double sided tape - - i will google this just to see -

https://www.professionalplastics.com/PL ... T-EXTRUDED

i may just get this from the above site - make it easier for me - have it cut to the size i want and double sided tape - for between the cells at least - i will have a better idea once i have them here and can test fit them in my shoe box - i may have to extend it a bit - using two boxes to make one - i had to do that with the headways also - but worked fine and fit perfect my back pack i been using -

i can even test fit my battery tray from my 646 chair - just to have an idea what can fit in there - size wise etc, - its a group 24 tray -

[expresso]

Because if you plan to keep them full for more than a day or two, then they suffer.

They like to be half charged. Or a bit more. They dont much mind being at 30 to 70% charged. Long term. They will tolerate 80% for months on end.

Its a bit like breathing. Breath in with a maximum full breath. You are fully charged, but uncomfortable. You would rather breath out a bit! Esp after a while waiting. Same when you empty your lungs. Its not pleasant. The lithiums feel the same! Its why they are never shipped fully charged.

Ok i though it was for safely reasons they shipped them half full etc, - either way i can do that - since i am not going to rush doing this - i dont have the other items i need - i am not sure if i have to make connectors using wire or it will them - or if i even have any nuts screws etc, - so this will be all new to me

i will take my time - charge one - discharge it a bit and move on to the next - i will use the single charge preset but make it 10A - since its a 60ah Cell -

[expresso]

i just checked on that plastics site and everything is too expensive - have to meet the min. order of 30 for each item i want cut - then shipping is another $20 -

i will use rubber silicone in between and around along with the PET green tape to wrap it and tape - unless i find something outside here some cheap plastic sheet - not counting on it - i never find what i need when i look for something -

i placed sheets of 6.5 inch x 5 inchs - and needed to add close to 25 or 30 of them to meet the Min. order - and then add in 20 shipping - well over $60 and i dont even need that many - just 9 of them this size - i can reuse the packing i got my cells in - white hard foam for the base - should be fine

the little items needed cost more than you thick once you start buying them -