Has anyone ordered from Bmsbattery lately?

[iain85]

It's time to build e-bike number 2 and just wanted to know if Bms battery was still the go to outfit for kits and batteries? Thanks in advance.

 

[Deleted member 4366]

It depends what you want.

 

[iain85]

Hi D8veh,
Actually you advised me the last time ! I'm hoping to build a similar kit to what I ordered previously albeit with a smaller battery as I'm rarely getting past the green light going out on the battery indicator!
I've got a 36v v 20ah battery and the bafang 500w rear wheel drive kit with the twist throttle I am really happy with it but I was wondering if there has been any advancements on battery size as I could be keen to get a bottle battery type to ease fitting? The 36v 20ah lump is quite weighty and if at all possible I would like to maintain the 'oomph' provided by the existing kit but I don't mind sacrificing range as like I said I'm barely getting the green light to go out on the battery indicator?

Many thanks,

 

[Deleted member 4366]

You can get one of those pod type batteries that go in the triangle from Em3ev.com.

 

[iain85]

Thanks, prices seem high compared to Bms though. Would this be suitable to power the 500w bafang motor?
http://www.bmsbattery.com/36v/676-bottle-ebike-battery.html

 

[Deleted member 4366]

The BMS on that one is only rated at 10 amps! You need one rated at 20 or 25 amps.

 

[iain85]

Oh ok thanks. Are there any bottle batteries capable of the 20 - 25 amps?

 

[Deleted member 4366]

Some can provide enough for 20 anps max, but not the 30 amps for a KU123.

 

[iain85]

I see, would I notice a huge difference in the real world compared to the 20ah 36v lump? I do relie a fair amount on the throttle for the off road sections.

 

[Deleted member 4366]

Torque is directly related to current, so if you go from 30 amps to 20 amps, you'll have 2/3 the torque.

If you go for a slower wound motor like the 201 rpm one (code 14 or higher), it'll climb hills just as steep, but more slowly.

 

[iain85]

Ok thanks. I think I'll give this combination a go. Can you please post a link to a battery from Bms with the 20amp current you suggest?

 

[Deleted member 4366]

They don't do a frame-mounted one - only rack-mounted like you already have. If you search Aliexpress, you can find bottle batteries They normally have a capacity of 11.6ah. You have to check the specification in the listing to find the discharge rate.

 

[Alan Quay]

The last order I put in with BMS took about 6 weeks before it was dispatched. After that, it arrived within a week or so, and I had to pay £60 import taxes on a £390 order.

My guess is that they are having trouble keeping up with demand. My order was for a battery (10ah shrink wrap), a rear BPM in 26" rim, and a load of bits n Bob's.

I may just have been unlucky.

 

[iain85]

Thanks all, I may just order what I already have again then and just cope with the weight again.
Is the 6 week lead time due to the battery not being allowed on a plane?

 

[Alan Quay]

No, it took 6 weeks before they sent it. After that I presume it came by air.
The battery had a sticker on it declaring it as a 3.2v power supply.

 

[Deleted member 4366]

My last order for a battery, which was a couple of weeks ago, only took two weeks to arrive.

 

[Alan Quay]

My last order for a battery, which was a couple of weeks ago, only took two weeks to arrive.

I reckon it the BPM motors, or lacing them into a rim that's the problem.