Image 1 — DIY 14S5P ebike battery update: custom polypropylene shell
Image 2 — DIY 14S5P ebike battery update: custom polypropylene shell

DIY 14S5P ebike battery update: custom polypropylene shell

Quick update on my battery build from my previous post.

I made custom outer sleeve from 1 mm polypropylene sheet, shape around the pack profile. Its amazing that even cheap packing tape grips the PP pretty well. I'll reinforce it with fiberglass tape when I get it.

My next steps:

Fishpaper over the exposed nickel

EPDM around the perimeter and BMS installation

Mount it all inside a frame triangle bag with EVA foam for cushioning

Still work in progress. The current shell is mainly for mechanical protection.

Curious of what you guys think so far!

u/GoneSpiritual — 4 days ago

It’s finally done. 14S5P custom e-bike battery pack.

After way too much planning, CAD, nickel testing, ruined wraps, current-path overthinking and spot-welding drama, the pack is finally welded.

14S5P, 70× 21700 BAK 50E cells, pure nickel, built for my custom e-bike project.

I also made proper solder tabs for the main + and −, with a second nickel layer and insulation underneath, so I don’t have to cook the cells when attaching the main cables. There’s a tab on both sides of the terminal group to spread the current better.

Still need to install the BMS, balance leads, main cables and finish the 3D printed enclosure, but the part I was most paranoid about is finally fucking done.

Very happy with how clean it turned out!

u/GoneSpiritual — 12 days ago

Help designing a battery shape to fit in the bike frame

Currently I'm testing out various layouts.

I've check trapezoid layout, but currently leaning more towards an electrically superior layout of 14x5 honeycomb, but it leaves me with small margin to play with.

Currently my constrains are the bike frame (outer triangle), I added padding of 10mm (safe margin - inner triangle) and another 3mm margin.

I'm thinking using a 3D printed enclosure.

Do you guys think it is acceptable amount of space left within the triangle? I total margin left from all sides: 15mm (photos attached).

https://preview.redd.it/aia0z2mpf9mh1.png?width=1608&format=png&auto=webp&s=71b1614cacaa2f3d02425dab3a6d95315fb0583d

https://preview.redd.it/2pjz961rf9mh1.png?width=1428&format=png&auto=webp&s=73a4a0c33d9b4eebd2f752efee7519b5df9b6aa6

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u/GoneSpiritual — 2 months ago

Help designing cell group layout

I've been thing super hard and trying to get AI to help me, but it's just giving me stupid advice. I can't find any information on how to design best layout for this kind of pack form. I've spent all day trying to figure it out. Maybe someone with more experience can help me? I would be very thankful, it's been a headache.

u/GoneSpiritual — 2 months ago

When do you actually need double or triple nickel strips?

I'm trying to understand when you actually need to use 2 or 3 layers of nickel instead of one.

If I’m using 0.15 x 8mm Ni strip building a pack for around 40 A max, how do I know which parts need double nickel?

I think not every strip is carrying the full current cause it splits in multiple paths.

Do I look how much current goes through each strip ?

And does stacking 2 layers double the current handling, or is it more complicated?

I need to understand the logic behind it instead of adding more nickel everywhere.

Important: I use non sqaure layout of cells.

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u/GoneSpiritual — 2 months ago

Is it worth cutting slits in the Ni strip for better welds?

Was thinking of trying that, wonder if it's worth doing. What do you guys think? Will I achieve a bigger nugget?

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u/GoneSpiritual — 2 months ago

Nugget question

Hello, been practicing spot welding. Found settings which consistently give these nuggets. What do you guys think? Are they good? Pressing electrodes with 2.5kg force.

u/GoneSpiritual — 2 months ago

Possible to modernize?

What upgrade path should I go? Don't know the year. I though about new stem + steerbar, saddle and transmission

u/GoneSpiritual — 2 months ago

Uncomfortable with the idea of using dating apps

I’ve been thinking about trying out dating apps, but the whole idea just makes me uncomfortable.

It feels like theres too much competition and like men are expected to be really good at chatting and presenting themselves, and probably somehow standing out instantly. Im not terrible socially but definitely not amazing at texting or starting conversations with strangers out of nowhere, chit chat shit is not for me.

I prefer meeting someone in real life because I need to actually feel the vibe with the person. The problem is that in real life it feels like everyone is either already taken or busy or just not interested or not really approachable. So logically dating apps seems like obvious option.

But heres the twist in my head: the idea of being seen like an object in a swipe system feels sketchy as fuck. I know thats basically how it works but it feels fake before I even start.

At the same time I dont want to just sit complaining and refusing to try anything. Im thinking how to approach dating apps without feeling like entering some weird marketplace.

Has anyone felt similar about this? Has anyone overcome those "dehumanization" feelings? Anythin you could maybe guve advice on? (Never had a dating app account before)

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u/GoneSpiritual — 4 months ago

What does hearing the Holy Spirit mean?

I wonder if it's some intuitive feeling or just overwhelming thoughts, neccessity to do something?

I don't understand it and I want to come closer to God. I seek Holy Spirit but I feel as if I'm not doing it from the heart, more like doing the logical steps to get closer to it.

I really feel nothing, but my mind says I should. I pray as if from a template, try to worship at the church, but I am unable to do it truly from the heart.

Somebody please help me. I am 100% believer but I can could count on my finger how many times I "felt" God.

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u/GoneSpiritual — 4 months ago

What do people mean by "hearing the Holy Spirit"?

I wonder if it's some intuitive feeling or just overwhelming thoughts, neccessity to do something?

I don't understand it and I want to come closer to God. I seek Holy Spirit but I feel as if I'm not doing it from the heart, more like doing the logical steps to get closer to it.

I really feel nothing, but my mind says I should. I pray as if from a template, try to worship at the church, but I am unable to do it truly from the heart.

Somebody please help me. I am 100% believer but I can could count on my finger how many times I "felt" God.

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u/GoneSpiritual — 4 months ago

How the hell do these people get so ripped?

I keep seeing photos of people getting insanely ripped in what looks like a very short time, and honestly it feels wrong.

I’ve been working out consistently for around 3 months, but I’m nowhere near that level. Some of these guys seem to lose fat, gain muscle, and get sharp definition incredibly fast.

What am I missing here?

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u/GoneSpiritual — 5 months ago
▲ 5 r/Nuvio

Can't watch anything

Something happened. When I try to watch something it won't load. Tried downloading - it throws HTTP 500 error. Link straight from the TorBox works fine though.

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u/GoneSpiritual — 5 months ago

Unable to Login

Hello, can't login to the website.

It throws an error: "An error occurred. Please try again later."

What's going on?

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u/GoneSpiritual — 5 months ago

Ieskau draugu / bendravimo Kaune

Sveiki, esu 25m vaikinas, neseniai Kaune ir realiai cia beveik nieko nepazistu, tai pagalvojau pabandysiu parasyti cia, gal nebus taip keista kaip atrodo galvoj.

Ieskau normalaus bendravimo, ne kazkokio desperate networkinimo ar awkward meetupu, tsg zmoniu su kuriais galima nueit kavos, pasivaiksciot, pasneket apie gyvenima, muzika, tech, sporta, beleka, nesamones ar siaip kazka paveikt mieste.

Apie mane trumpai - ramesnis, bet ne uzdaras, sportuoju, domiuosi technologijom, audio/headphones, visokiais setupais, megstu pajuokaut, siaip esu normalus zmogus, bent jau taip tikiuosi lol.

Nesitikiu kad cia iskart kazkokia draugu grupe atsiras, bet gal yra zmoniu Kaune kurie irgi nori prasiplest social circle ar siaip neturi su kuo kartais kazka nuveikt. Gali but tiek vaikinai tiek merginos, cia ne dating postas, labiau normalus bendravimas.

Jei kazkam limpa vibe, parasykit pm.

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u/GoneSpiritual — 5 months ago

Looking at the mirror was very interesting

Hello,

I've lucid dreamt numerous times and I enjoy doing experiments in the dreams.

Last time I tried looking at the mirror because I heard some weird stuff happens.

Anyways, I did. My head looked like an embrio. Deformed, pale. It looked like an alien with black eyes on the sides of the head. Skin being semi-transparant. The head looked shiny.

I didn't gets scared. Suddenly it morphed into my real face and that was it about this experience.

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u/GoneSpiritual — 5 months ago
▲ 1 r/FiiO

Experiencing the EQ being buggy. I have a EQ specific preset.

When I power on the BTR17 the EQ is not being applied, some other settings are being applied, it sounds different from my settings.

I have to cycle between presets back and forth to get my EQ applied, or turn the EQ off and on.

It works normally until I power cycle the device.

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u/GoneSpiritual — 6 months ago
▲ 20 r/PrayerRequests+1 crossposts

I have horrible things happening in my life. Some people won't forgive me for my mistakes.

A long time has passed, but my mistake still haunts me.

I'm praying everyday and trying to do God's will, I'm still ok, but the anxiety is so severe. I'm asking for a sign from God that would tell me "it's gonna be alright.". I have faith in God, I just can't stand the pain and fear.

Someone please pray for me and for those people who so deeply hate me. Only God can help me in this situation.

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u/GoneSpiritual — 6 months ago