My E bike bulid FSR Specialized 2500 W

View attachment 1

after burning 3 controllers and few months of work

this is my main transport for short trips

spec:

Motor :1500 W Leaf Hub motor
Battery: 18650 from old laptops 48 V 15 AH 60 amp continuous draw current
Controller : Phase Runner - Grin Technologies + Cycle Analyst 3

Front fork: modified Bomber 150 mm ( preload rebund adjust)
Rear : DMN Burner ( rebund preload adjust)

wheels 26 '' 2.25''



Love this thing

Nice looking. How did you make that battery case?

Super clean and purposeful. I bet it's a blast to ride. Looking back on the build can you think of any lessons learned or changes you would make?

Hey Guys

Here is picture how battery is done



13 s 7p battery from old laptops

case is made from the aluminium sheet 2 mm think and 8.5 cm wide

going around that space that I had there

mounting in on the bottom in via 4 mm screw on the frame ( existing holes for water bottle in the bike)

to protect battery from touching aluminium case I puted inside and around the case 8 mm line from the shop

so battery is sitting nicely and also there is a small channel in the middle for better cooling

8 mm line works perfect

I used velcro to secure battery inside

Is very easy also to take out bat from the case

closing panels made from 2 mm mouting board

I use electrical insulation tape to keep this case closed

is rain proof

@Rube

yes
1 :

I would change my bms that is charging now each cell to 4,2 V to bms with adjustable charging voltage for ex: 4,1 or 4,15 V
that will make more cycles on my battery

As You can see there is still bit of space in there so I keep that for new bms or usb dc dc etc etc

I see on the banggood there is few bms chargers with adjustable charging voltage but they are soo big and wont fit in there

I like when everything is bulid into one case

2:

I would like to have new 18650 cells with better capacity and draw current

3:

In the future I would like to put there cooling fan ( small one inside the case ) with the termometer

so I would like to keep the same temp for the cells when riding





I have solder another the same shape battery but 13,5 AH

so when one is flat is easy to swap them


I think that is at the moment

Thanks for the comment Guys