Sourcing batteries

[droo]

Guys,

I am looking at various kit options and self build ideas at the moment but seem to be stumped for battery suppliers etc.

Anyone got any advice or suppliers to suggest ?

Droo

[The Maestro]

Originally Posted by droo

Guys,

I am looking at various kit options and self build ideas at the moment but seem to be stumped for battery suppliers etc.

Anyone got any advice or suppliers to suggest ?

Droo

There was a nice looking one on ebay.com which was 20 AH 24Volt or 48Volts 10 AH. I think it was $500. I'll try and find a link.

Most of them seem to come from china though, I wouldn't be surprised if you could get something like a 10 AH Phylion Li-Ion for less than £100 direct from china, but its hard to find manufacturers who supply single units. Its something I've been planning to look into when my battery starts to go kaput.

[john]

You could look at Yesa or Ping LiFePO4 batteries from China. Both use ebay.

[Orraman]

cyclone.tw.com
2 hour charge time, or there is ~~

New battery supplier thread on 2nd July, still waiting for a guinea-pig.
www.maximus-racing.com

[The Maestro]

This is the one I was thinking of:

48V 10Ah/24V 20Ah LiFePO4 Battery electric bike bicycle - eBay (item 150272592766 end time Jul-25-08 03:39:24 PDT)

Looks pretty good value if the claims are true - up to 5000 recharge cycles.

[Jeremy]

Some of the eBay sellers are great, Ping and Yesa are well proven. Some are scoundrels, so tread warily.

Personally I'd just email Li Ping for a price; he'll send you a PayPal invoice and the battery will arrive a week or two later. I bought a 36V 10Ah pack from Li Ping a while ago and it's very good indeed. It came complete with charger and BMS, all I needed to do was make a hard case to put it in.

Another option is to buy cells directly from one of the reasonably well-regarded Chinese companies. Headway will sell direct in small quantities, as will Thundersky and one or two others. The snag with this is that the cost of things like international bank transfers (and the associated risk) makes this a bit pricier than buying via eBay or using PayPal.

Nick (Tiberius) and I have both bought Headway 38120 cells; I have 64 of them for a 48V, 40Ah pack, Nick has a few less. They aren't that easy to assemble into packs though, I had to build a capacitor discharge resistance welding machine to assemble my pack.

Jeremy

[Tsnafu]

Originally Posted by The Maestro

Its something I've been planning to look into when my battery starts to go kaput.

Why not buy another one from Bob?

- Online Shop

36v 10ah £210 free postage

[Tiberius]

It all depends what you are trying to do. If you already have a commercial assembly with a mount for a battery pack, then you want the standard battery to fit it.

As Jeremy says, building cells up into a pack can be a pain. You know how you find there is always one part of a project that takes the time - well, building the battery pack and case has turned out to be that part on my current project. It has fought back every inch of the way. Other bits have just fallen into place.

Nick

[Tiberius]

PS, to droo, the original poster of the question...

What spec battery are you after?
I found one of the key spec points was the max discharge current. That, compared with the battery capacity (Ahr) gives you the C rating, and that in turn restricts your choice.

Nick

[droo]

I was thinking of getting a Phoenix Racer 4840 or 3640. My commute to work is approx 6 miles each way and relativly flat with a mile or so steady climb on the way there.

So Ideally I need a range of about 20miles to make sure im ok !

If I have done my sums right than I recon I might squeeze it on 48v 10AH but would liek a little bit more for compfort !

Droo.