Here is my pneumatic setup, which will be very similar to @mmaner’s build. (The main difference is that I am going to build a bigger 10s4p battery pack.)
@psychotiller’s 6x2 SixShooter wheels 2x @psychotiller’s Ripba motor mounts 195mm Paris trucks (V2, 50 degrees) Red Ember (@treenutter) Caldera deck Edit: Decided to use Red Ember (@treenutter) Mas dec 2x 190kv 6355 Torqueboards motors & 16T motor pulleys 2x VESC (either Focbox or Axle VESC) 10S4P battery pack with 30Q cells XT90S antispark key BMS (have not decided which one) Enclosure (possibly space cell, need to decide)
Gear ratio: 16/60
(1) I’ve already got @psychotiller’s wheels & motor mounts. The delivery was super fast. The parts look gorgeous. They seem to be high quality and precision made. Also they are quite light.
(2) @treenutter says that he has a queue of people who preordered decks, and he can start working on my deck only in a month or so. I guess I have to wait for it.
(3) I’ve used Torqueboards motors before and they work fine.
(4) Battery: I am going to build a 10S4P pack myself using 30Q cells. I’ve got an Arduino spot welder, and last year I’ve built a battery pack for my Loaded Vanguard. It was a lot of fun to spot weld the cells.
(5) VESC: I have a pair of new Axle VESCs, which I could use. I also like Enertion’s Focbox (aka VESC-X). The latter has a heatsink, a protective case, and a form factor which makes them easier to fit into the enclosure. I’ve successfully used Focbox’s but I have not used Axle VESC’s.
Does anybody have comments on reliability of Focbox vs Axle VESC? Are they pretty much comparable?
(6) I would like to minimize the number of electronic components in my board. My theory is that the less electronic components the board has, the smaller the chance that a component fails while riding.
This means that
(a) I’ll use XT90S plug instead of electronic antispark switch. (b) I will NOT use a fuse. © I will NOT use a BMS for discharge.
I think that these choices are better for safety. Maybe in this setup there is a higher chance to burn VESC. (One needs to be extra careful not to short circuit anything.) But my safety is more important than VESC. Any comments or opinions about it?
(7) Enclosure. I might use a space cell enclosure. But I am also considering the fiberglass 12S enclosure from @Eboosted http://www.electric-skateboard.builders/t/loaded-vanguard-and-never-summer-reaper-enclosures-for-sale/17137/112
Does anybody know how well it would fit the Caldera deck?
(8) BMS. I’ll be using a BMS only for charging the battery. But I need to decide which one.
People here say good things about Bestech or Battery Support BMS. But they are huge, and will not fit into the enclosure.
In my Vanguard build I used this cheap $10 BMS (suggested by @Eboosted):
@Eboosted says that they work fine for him. I have mixed feelings about it. The first one stopped working after a week. I’ve ordered a new one, which seems to work Ok so far. Also it took very long time for it to arrive from China.
To tell the truth, I’ve been mostly using my Vanguard board without a BMS. I was using a 10S balance changer to charge it. I kind of like this solution, because I can easily monitor the cells. But I needed to open the enclosure every time when I charged the board, which was a pain.
So I need to either
(a) Find a small and relatively reliable BMS (for charging only), or
(b) Find a clean and waterproof way to make charging port and balance connectors for charging with a balance charger without opening the enclosure.
Has anybody found a good solution to (b)?
Do you have other suggestions for a small BMS (for charge only setup)?
Actually, Enertion’s space cell battery uses a BMS which is even smaller than the one linked above (and probably costs below $10). It should be easier to fit in the enclosure.
Do you know what BMS the space cell uses and where to get it?
Any other comments and suggestions?