36v 500w vs 52v 1500w

[Tim Goffin]

Cool, that was my thinking 47v for my 52 and 44 for my 48,

Give it another 15years hopefully we will have these super batterys tesla are talking about...I look forward to having a 50ah battery that only weights 5kg lol....then every1 will hav an ebike...

 

[Nealh]

Using good cells help currently for price I'm using PF but future builds will use GA.

 

[Tim Goffin]

My 52v is sanyo ga 20700 cells and my 48v is boston power cells...jimmy said the bostonpowers are very good... I took his word for it..

 

[Nealh]

20700 cell price to high in my view so 18650 for me still.

 

[wheeliepete]

Yes, those 4250mAh Sanyo 20700B cells I would love to try, but they are a bit pricey

 

[Tim Goffin]

Yes, those 4250mAh Sanyo 20700B cells I would love to try, but they are a bit pricey

Agreed they where not cheap...£620 from jimmy for 17ah 20700 52v also he could not for the sub charger or battery indicator in the shark case with them. However he told me they are the best so I thought f€ck it...I set a limit of £1650 which I just about done with 2 batterys... pretty happy all round..

 

[Tim Goffin]

Agreed they where not cheap...£620 from jimmy for 17ah 20700 52v also he could not for the sub charger or battery indicator in the shark case with them. However he told me they are the best so I thought f€ck it...I set a limit of £1650 which I just about done with 2 batterys... pretty happy all round..

Mis typed...I ment not fit usb port..

 

[Tim Goffin]

Mis typed...I ment not fit usb port..

This is also becoming abit of an obsession now...already looking at building a new bike lol...nothing wrong with the one I have, just quite enjoyed the build process..reminds me of my rc heli days

 

[peter.c]

Its the buzz of the build and the problem solving is there room in the garage for another one

 

[wheeliepete]

is there room in the garage for another one

Be careful, this can quickly turn into is there room in the garden for another garage?....it's a slippery slope

 

[Tim Goffin]

LoL...my shed is 5x4 meters....plenty of room haha

 

[peter.c]

Wait till you get the comment you can only ride one at a time or the parcel delivery driver knows your first name

 

[Tim Goffin]

My wife has mentioned that I have enough bikes lol...I have already sold my full sus carbon norco...I have decided that peddling is for pussy lol...

 

[anotherkiwi]

Yes, those 4250mAh Sanyo 20700B cells I would love to try, but they are a bit pricey

375€ for enough cells to make a 20 Ah 12S (44.4v) battery, I don't find that particularly expensive.

309€ for 30Q cells

381€ Multistar LiPo

All of the above are 15 Amp discharge

 

[Tim Goffin]

Also if tesla are using them and the 21700, then they must be the best I'm thinking....

 

[anotherkiwi]

Highest energy density for the weight at the moment. Oh and they built the factory that makes them in the US

 

[wheeliepete]

No, your right AW, when you take the higher power density into account, you need less cells for the same Ah Damn it, I might have to buy some now...thanks a bunch for pointing that out

 

[awol]

The extra cost per cell is helped by only 30 x 4250mAh Sanyo 20700B cells to get a resonable 36v 12ah battery vs 40 decent 18650 cells. Or only 20 Sanyo cells for a lightweight 8.5ah battery. Next years project could soon be in planning.

 

[Tim Goffin]

Think I may have spent some of your guys hard earned money for you lol...sorry...
Do remember that with the 20700's jimmy had to ad tape to my shark case to fully seal it, he called me to check of course...oh and no usb or battery gauge...I'm sure Shenzhen will build a vase for the 20700's soon...

 

[anotherkiwi]

I'm busy deciding between the German welder kit or the Korean one... Mine will go in custom built casing, the first will be a 3P10S 12 Ah 36v battery for Number Two and the Mxus rear hub.