DIY Lion packs - 'Vruzend' (comments or anyone using them?)

[Cliff Matthews]

Just asking in case anyone's had poor results with the design. I see 2 possible design issues at first glance:

1) Each end cap applies pressure to the cells end-cap via sprung mechanism (is this trustworthy >2 amps?)

2) Some previously spot-welded cells have (+) point inset with a small circular gap distance to the (-) wrap of case.
    (can this kind of sprung mechanism move or vibrate to the side and short a cell?)



Each kit has enough parts for 54 cells at $40 USD (so not really an earth shattering price point..)

Julian Ilett short review - https://youtu.be/qLXG3pR5teg

[jbb]

I haven’t used them, but I would be very worried about vibration causing increased contact resistance for any kind of mobile use.

If you have a high resistance contact on the -ve end of a cell, it might get hot enough to make the vent open. Or even hot enough to experience a “thermal event.”

[MosherIV]

Have not used them either.
Agree with jjb.
Commercial packs are spot welded for a reason !!!
Maintain contact. Minimise contact resistance. Immunity from vibration etc.

[PA0PBZ]

https://www.indiamart.com/ruzen-inc/solderless-kit.html#vruzend-solderles-kit-v2-1

About 14 GBP for the 2.1 set, although I could not find what exactly is in a set.

[Edit: Just click full details]

Each box of the orange and black V2.1 comes with enough components for 30 cells.

Contents of each box are

* 60 terminal caps with Nickel coated pure COPPER internal contacts. (30 orange and 30 black)

* 60 Nuts

* 80 Nickel coated pure COPPER bus bars for the Series and parallel connections

* 4 Nickel coated pure copper clamps for your terminal wires.

* 8 Barrel bolts for clamping the opposite ends together.