Building 18650 battery pack


#1

With some help, I am finally getting around to the last and final step on my efoil journey, building a proper battery pack!

It’s essentially the @pacificmeister build (obviously the older one since it’s using the Parker gearbox). Probably wanting to replicate what @Hiorth did with their battery pack as much as possible.

Questions:

  • What is the optimal amp output I want?
  • Best way to waterproof this?
  • Any other advice or something I’m not thinking of?

MAC's 2nd build
#2

Are you planning on connecting your cells with nickel strips? Will you use a BMS? I’m also building a pack and I’m looking for the optimal set up!


#3

Definitely using a BMS. Not sure about the strips, that’s a question for the tech guy helping me but I’d say yes just based off what I know about large packs.


#4

Ok so we’re going to divide the pack into 3 main parts. 12S5P x3. So it’ll have 3 BMS’s. Kinda worried about the ability to kick out 180a continuous and the wires going into the ESC only being 10awg. I guess it’s been talked about on here before but hopefully I don’t have issue.


#5


#6

Trying to find a plug or inlet for my waterproof case. What is everyone else using?


#7

Do you have any progress I’m at the same stage as well please provide pics if possible I’m stuck. Lol


#8

I have terminated the wires in the box itself and use cable glands to get the wires waterproof. It‘s not as quick to dissassemble, but much easier to waterproof compared to a plug.
In my opinion you should have some means of switching the battery off that is not a plug. Huge relay or electronic switch in the battery box would be my recommendation. Please don‘t forget a fuse, in a prototype sometimes those get blown and they are much cheaper than anything else.


#9

Pack is finally finished! Double shrink wrapped and dipped in plastidip.


#10

Looks Nice! What BMS did you use and maybe you more photos in the making?


#11

Looks great, well done