Battery half done, serial connections tomorrow
Edit: You might notice that the packs are not all straight, some are slightly bend to fit the slightly curved deck
(I love when a plan comes together ;))
Battery half done, serial connections tomorrow
Edit: You might notice that the packs are not all straight, some are slightly bend to fit the slightly curved deck
(I love when a plan comes together ;))
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Older picture of the first layer of dye:
After that I changed the name to Blutstern. I love the color, as soon as I have the epoxy I’ll seal it with that 
I just placed the charge port:
Inside:
Of course I won’t do anything cosmetically here, only functional stuff (cable management. I had to modify a bit to use the Hammock baseplate, its slightly too big for being mounted drop-through.I’ll use low shockpads in hope for vibration reduction and I managed to get both the Paris and the Hammock baseplates to same height with a very low angle (30° I think) in the back
A red (:D) 16x9 LED Matrix for speed(number) and voltage (bar):
I’ll put tape on the inside to seal and then fill the hole with the matrix with Epoxy. After that I’ll sand it down together with the rest of the lid and cover it in a final epoxy coating with glass frit
Its working but only without direct sunlight, for that its not bright enough. I’ll try that nonetheless and might replace it with a slightly bigger e-Ink display in the future.
Due to the bevel routing and the dark color the board almost looks slim 
6 Likes
Can you share the link again? How have these been working for you?
This time I use these with 12 pins
In the Grünstern it is the 12 poles version from here:
https://www.bulgin.com/us/products/range/circular-power-connectors/400-series.html
plus a QS-8 for the main power lines.
The new one is much bigger (more than double the size, looks like a electric car charger connector in small) but it is capable for 10A in the 12pin version. This battery is so huge I’ll never need the expansion pack, which was the reason for the big QS-8 on Grünstern, so I can use one connector for charging this time 
The WF28 has a rubber cap but I’m planning to make a cap thats making use for the threads on the connector from the screw ring on the side (I’ll post pictures when I did that :))
3 Likes
Thanks for the link and explanation. I’ve been deep in the connector hole on a few occasions.
10s means 11 balance wires, use the first and last wires for the power lines? Leave the 12th pin free?
I guess one concern is, as amps go up the skinny wires have more voltage drop, so your rate of charge gets a little wonky, but it should level out as you get into the CV stage.
WF28 means 28mm diameter on the circular part, pretty big.
One more interesting spec is the number of mating cycles the connector is rated for. Sometimes with tiny pin connectors it’s as little as 15!
wait wtf this?
https://www.rcgroups.com/forums/showthread.php?3205861-QS8-connectors-(8mm-XT-90S)
8mm version of XT90s (4.5mm)?
Gonna go dig around in your build thread again lol.
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Exactly I usually charge with 4A max so it should be fine They say its 500 cycles.
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Yeah, mostly because I wanted to prevent an accident like @Andy87 had, swapping the Antispark with Charge Port A XT90 would have been sufficient for that but this way I could have pulled 120A that the combined two 12s3p batterys could theoretically deliver
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Have you also found a durable sheathed multiconductor cable? Sigh I’m gonna stop asking and go check your build threads again.
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No, I use 9 separate 22AWG silicone wires plus two awg16.
Its ok, I’m happy that my monologue I started 13 days ago has been finally interrupted 
2 Likes
Just so you know, I love your build threads. All the messy epoxy, sanding, and electrical madness. You’ve not been posting in vain.
I’ve got my hands on one of these:
And I really think I should dump the bms’s in new builds.
Your builds are one of the few bringing the balance points to the outside in a serious way. So I’m always watching.
Also, I’ve been looking at stuff like this:
https://www.aliexpress.com/wholesale?SearchText=flexible+sheathed+wire+core
And also this type of stuff for power leads
https://www.amazon.com/gp/product/B0764TSZNG
2 Likes
A shielded silicone multistrand wire would be best but a quick search only gave my up to 5 cores. I’d always use silicone wire for balance cables though
5 cores
btw, this one will be really organized compared to the other builds I have to think about how to keep the batteries from moving this time
I’m gonna cut the screw ring a bit but basically this is my idea for the cap. The stock one was without threads, couldn’t trust it
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Aaaah it’s so nasty looking I love it!
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Are you going with subpacks with XT150 on all of them? Gonna cost a ton of space!
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