Hi, Adam, I’ve went through season 2 and 3 posts trying to understand what kind of resin you are using to improve battery waterproofness
In season 2 there is a screenshot of what it looked like general purpose epoxy (green metal can). I haven’t tried yet and have only been reading, but from what I understood the hard epoxy can prevent/affect natural cell expansion during the pack heating while being in use.
What’s you personal experience with that, have you swapped to different methods in the recent past?
I’ve found that from what it looks like an industry standard is to you use temperature resistant Polyurethane that cures semi rigid and is often has good resistance to fire.
Here a couple of products I’ve found this morning:
This prevents the epoxy from going thermal during potting. However you are right, it gets pretty rigid and hard.
I potted up to 3kwh pack with 3kg of epoxy in this way, and 7 assist packs in 12s2p and 12s1p.
I think you are right and that a specialized PU encapsulation resin would be more suitable.
Cylindrical cells should have very little expension, but they can still vent under some conditions. I think this is still quite safe for small packs, and the mechanical and waterproffness strength ougthweigth the other risks. I would not do a big pack again with epoxy.
Then I will do a plate under the mast that will be used to fix the phase cable and the pod.
This is pretty simple, but I dont know how well I can expect the bag seal to hold under crash or wipeout situations. One of the ideas is to be able to use a silicon tupperware lid as extra safety, going over the whole assembly inside the bag.
The flipsky 6.7 pro is an experiment, it will likely be underpowered, but with a lower pitch FD style prop, it may be workable (maytech 6374 for illustration purposes only!!)
