Hi, I recently bought a Benchwheel Dual to see if electric skateboarding was for me. Turns out it very much is my thing and I’ve pre-ordered a Raptor 2. In the meantime I’m looking to upgrade the Benchwheel because it’s range has really dropped off and I’m thinking it’s the battery.
The board currently has Samsung 22p cells in a 6s4p configuration. Does anyone know of any reason why I couldn’t replace the cells with Samsung 30q cells? I am assuming that the existing charger and hardware will continue to work as expected but would really like to get some feedback before shelling out on 24 * 30q cells.
I’m no expert on batteries, but from a engineering perspective I don’t see any reason why not. The voltage will remain the same, I doubt the BMS cares about the amps, the motors might wear out pretty quick with the extra amps though.
Thanks for getting back to me guys. I’m waiting to here back from a company that specializes in custom battery packs. I believe the heat from soldering can be damaging so I’m looking to get them spot welded.
Right, I’m off to buy some cells, hopefully I’ll have an update soon for anyone else considering doing the same.
The BMS DOES care about amp draw (as it’s probably fused), but the ESC will only pull as many amps through it as it was originally designed to. It’s not that the upgraded battery will push more amps just because it can. The board should feel exactly the same except with more range and possibly less voltage sag.
I repeat, the BMS does not care about amps. Specifically because it is NOT fused. I know this because I bought one for my kid and I work on it all the frikkin time.
Quick update for anyone interested. I assembled a new battery pack using new Samsung 30Q cells and can confirm that everything is working great. I’ve used it for a couple of weeks and it performs better than when it was new.
As expected every area of performance is improved, hill climbing, acceleration, range, top speed.
I haven’t had to change any other components and the charger still works, although it takes a little longer to charge from flat which is to be expected.
Very cool! I have the same board and am also looking for an intermediate solution to get a bit more consistency of the 1800w dual. Their shop told me my board would have the 25r Samsung batteries but it’s still using the 22 ones… kinda pissed about that!
How much did you end up paying for the custom battery pack? Did you provide the cells to them? Lastly, would it be OK to ask for your order no. from these guys? Would make it a lot easier to explain to them what I am looking for
Great!! I got the same e board with same probelem…I dont know alot about the technical stuff…
but is it possible to connect a E-bike battery 36v 8.8ah ICR18650-22P in chain with my current battry on my benchwheel?
I ended up buying the cells, a spot welder and then built the pack myself. I’d made a few enquiries and it was going to cost around 250GBP to get a pack made by a company so it worked out cheaper DIY.
There are plenty of YouTube videos showing you how to put a battery pack together. The benefit of DIY is I’ve now got the option of selling the Spot Welder on ebay and getting 100 pound back :o)
@cradster - kudos man for diving in and DIY the battery!
For the next person who finds this and wants to duplicate, i’d recommend one of the arduino spot welders over the ebay one linked. Simple and less $. You have to use a car battery and a bit of fiddling for settings, but likely similar to the 788 welder - until you find setting that gives you a good weld through your thickness of nickel strip chosen. You can build your own and recommend upgrading the FETs and adding TVS and Shottky diodes for longer life. Search the forum here for arduino spot welder and you’ll find several threads.
Nkon is great for prices, but super slow shipping sometimes…
