Battery 58.4V laptop cells, 20Ah. + Waterproof&Anti theft Case £75

[epilef]

Home made battery composed by 126 quality used laptop cells (mostly Toshiba and Dell).
14S 9P. It gives 20Ah capacity.
Charger (3A) is included which will charge the cells up to 4.15V to enlarge the lifespan.

Pelicase + U-bolts to mount on double crown stanchions (30mm). Also included a pad-lock and anti-spark switch.

The case will need little re-work, I used to have the battery and controller inside so there's some holes in the back part, just need to be epoxy sealed if you don't need them. Also needs to be rewired and you need powerpole connector to connect the battery inside the case.

Recommended controller is 20A.

Reason for selling: I've been using it for 600 miles without a problem. Currently my commute is much shorter, only needing a 4Ah saddlebag battery.

This battery is NOT compatible with my other item for sell (due to the Low voltage cutoff): http://www.pedelecs.co.uk/forum/threads/specialized-full-suspension-frame-with-integrated-controller-bargain-£95.23209/

Send by courier.
Payment method: Paypal or bank transfer.

LAST PICTURE IS FOR AESTHETIC REFERENCE ONLY:

 

[cwah]

is there a bms on the battery pack?

the 20ah was tested via discharge test from what voltage (start) to what voltage (cut off) at what discharge rate (watt)?

picture on the pack construction? was it spot welded? was there separator between cell groups?

 

[epilef]

Ouh Cwah I can't compete with your battery builds. Sorry to disappoint you
No BMS
No Spot welded. Just thick (non stranded) coper wire. And glue gun between cells.
LVC was 49V (3.5v per cell) through Voltage lcd display.
Is a homemade laptop battery, and I was draging up to 2C from a 40A controller. Battery tackles hilly roads (12%) up to 51V. And performs flawlessly on flat roads. That's why I recommend 20A controller (shouldn't struggle with a 20A controller even at low voltages)

I do remember that you've got a huge controller (?).... as long as you ride on flat streets shouldn't be a problem.

There's no problem at all to try the battery for a week and if anyone is disappointed (which I guess no one will) can return the battery through a cheap courier like Myhermes or Collect+ . There's no problem To sell the battery through Ebay to help the buyer protection.

Cheers.

 

[cwah]

Hello,

I'm not concerned so much about the capacity or discharge rate, but more about vibration resistance.

Ebike is a highly vibration prone environment, and over time glue or tape can get loose....

When that happen, you'll have cell group (between each serie) that will start to chaff between each other.... and you basically have a potential difference separated by a tiny layer of heatshrink....

When this heatshrink is worn out, then you create a short and that may result in a fire or worse....

That, of course, wouldn't happen on the first few days unless the pack is completely badly constructed, but may happen after x months time....

That's why picture of the pack is important, so that I can evaluate extent of additional work or not required to have some level of vibration protection

 

[epilef]

No, there's not such caution between cells, only a ridid plastic layer and foam around the pack.
Columns and rows are sick together, there's no gap between them. Not a chance to wear off the film that protects each cell because they don't move.
I've never been concerned about vibration when the battery is inside the case because is so tight that there's no a mm gap.
Another account is how you handle the battery when is out of the case, I've been always delicate with it, and I wouldn't recommend the battery for people who is not cautious handling stuff or clamsy people.
Despite I haven't had a problem in 600 miles I would only recommend this battery for someone who plans to recharge the battery inside the case. And not for someone who plans to remove the battery from the case for a charge.

Thanks Cwah for pointing out.