Any good UK battery pack assemblers?

Does anyone know of a good battery pack assembler here in the UK?

All the best 18650 and similar cells are not even made in china, so the cell cost will be similar whether the pack is assembled here or in china.

Just the assembly work portion of the total cost will be higher.

I'd be looking for Em3EV level quality, because "buy nice or buy twice"

Plus saftey is number one concern with li-ion

Go look on facebook or your local online classifieds. There might be a person with an ad up in there selling their wares of such you need.
You on https://www.pedelecs.co.uk/forum/ forum?

markz said:

Go look on facebook or your local online classifieds. There might be a person with an ad up in there selling their wares of such you need.
You on https://www.pedelecs.co.uk/forum/ forum?

Click to expand...

I'm not on there yet, I'll sign up there and ask around.

Cheers!

Gorillazilla said:

Does anyone know of a good battery pack assembler here in the UK?

All the best 18650 and similar cells are not even made in china, so the cell cost will be similar whether the pack is assembled here or in china.

Just the assembly work portion of the total cost will be higher.

I'd be looking for Em3EV level quality, because "buy nice or buy twice"

Plus saftey is number one concern with li-ion

Click to expand...

Without doubt the best in the UK https://ebikebatteries.co.uk/
Lift the phone and ask for Jimmy, a very knowledgable and fairly priced outfit. I purchased a 48v 17.5Ah pack for my BBSHD, still going strong after 4 years, made from Panasonic GA cells.

If this bloke doesnt make them I bet he knows someone who does.

https://www.youtube.com/c/LeeWright

But it sounds like the post before mine already has this covered.

I build all my own packs and from the uk.I have one or two of my builds on my insta page.Fpvlee is my user name.I may be able to help for the right price.What bike ect is it for and what specs/numbers are you wanting from the pack?

Cheers Lee

Cheers! I'll give him a ring

I'll be going for a large 300 cell or more 48v or 52v 18650 pack as I'm going for utility and trekking

Mounting on the rear rack, as I don't think such a large pack would fit in the triangle or under the downtube

Few pics with an old E-dirt bike pack around the same size to give an Idea of placement






As rear racks go it's pretty solid thick steel, so should be fine. Plus means I can hide the battery inside a pretty standard rear rack bag







Going for a dual motor setup, 3kw Cyclone mid drive to rear wheel for powering up hills

250w or 500w direct drive on the front fork, aiming for a setup geared 100% for efficient cruising on flat roads at around 15 to 20 Mph

Because according to this performance analysis, the High powered mid drive would be very inefficient at 15mph cruising which only needs around 100 to 200 watts or less

https://electrotransport.ru/ussr/index.php?topic=34238.0

(In russian, but there's a table graph further down the post)

tommie said:

Gorillazilla said:

Does anyone know of a good battery pack assembler here in the UK?

All the best 18650 and similar cells are not even made in china, so the cell cost will be similar whether the pack is assembled here or in china.

Just the assembly work portion of the total cost will be higher.

I'd be looking for Em3EV level quality, because "buy nice or buy twice"

Plus saftey is number one concern with li-ion

Click to expand...

Without doubt the best in the UK https://ebikebatteries.co.uk/
Lift the phone and ask for Jimmy, a very knowledgable and fairly priced outfit. I purchased a 48v 17.5Ah pack for my BBSHD, still going strong after 4 years, made from Panasonic GA cells.

Click to expand...

speedy1984 said:

I build all my own packs and from the uk.I have one or two of my builds on my insta page.Fpvlee is my user name.I may be able to help for the right price.What bike ect is it for and what specs/numbers are you wanting from the pack?

Cheers Lee

Click to expand...

Looking at a 300+ cell brick pack

48v or 52v


Roughly 10x16 cell layout, doubled in 2 layers like the E dirt bike pack I posted pictures on further up the thread

Would need a BMS that can balance cells at 80% charge

To maximise total AmpHours out battery life

A lot of BMS need you to charge to 100% for them to balance the cells

That's a lot of weight back there, top heavy, tail heavy. Suggest you try a mockup-- fill a box with weightlifting plates, strap it to your rack and ride around to see if you like it.

99t4 said:

That's a lot of weight back there, top heavy, tail heavy. Suggest you try a mockup-- fill a box with weightlifting plates, strap it to your rack and ride around to see if you like it.

Click to expand...

Good idea, I'll just strap up that old battery as it's about the right weight anyway.



Hopefully the heavy direct drive on the front wheel will counteract the weight at the back somewhat

I won't be doing anything like like fast downhill trail riding with this so doesn't have to be a great handling setup.

This is just a get me and a trailer from A to B kind of bike