Talk:Open Source Battery Pack

Can we make a power storage version that uses standard 12V "Car Battery" style lead acids, or lithium batteries, or Nicads

Not for mobile but for Tesla Powerwall and Tesla Powerpack type uses

I think i saw a plan for something like this Here

they used 100AH LiFeYPO4 3.2V Battery Cells, as they didn't like the power loss of lead acids

Making Modules out of These nicad 12v 1,800mAH ~90.93 USD a piece

Supposedly "A standard small car battery is about 45 amp/hours." or ~4,500 mAH depending on which lead acid is chosen

Lead Acids go from around $50-300 depending on which style/company

2-3 of the nicads would have around the same capacity for $181.86-272.79 which is competitive (and has a longer lifespan making lifetime cost cheaper)

This was a bit of a rant, and may need it's own page, but i thought I'd Bring it up here first

--Eric (talk) 23:40, 30 January 2020 (UTC)

FOUND IT , goodness this was hidden

9:48 est

I think Design for Repair / Design for Decommissioning etc is an area OSE Could leverage well. Also POTENTIALLY Sodium-Ion Batteries and/or Supercapacitors if we could get set up with the right supplier.

Essentially have a "Stack" of modules+o-rings connected by Threaded Inserts thus allowing the whole pack to be torn apart and put back together easily without pyring it apart/melting glue etc

Also Rubber Reversion wouldn't be an issue if the "Rubber Armor" was removable etc

Having the Open Source BMS communicate by USB or CAN Bus (in a non-encripted manner) in order to make debugging batteries "on the fritz" would be WAY nicer of a UX than the status quo of blinking charger lights and putting it on and off a charging dock 10 times and still not 100% getting what's going wrong.

It would NOT be a SWAP-C advantage, compared to COTS options, but optimizing for Thermals (Heat Dissipation with exposed heat sink fins, internal Heat Spreaders / Vapor Chambers etc) would be nice as well

Doing a Hybrid Supercapacitor-Battery setup would again be bad from a swap-c perspective, but may adsorb some of the shock in demand off of the battery?

All in all in order for these to REALLY shine, they would need a local nerd / makerspace / OSEH etc where anyone can drop it off + get it repaired on the cheap, otherwise going to home depot and getting a spare will make sense for most

ALTHOUGH early adopters/nerds ARE a market, and there are examples of that ( Pinecil / TS-1000 , Open Source Headphones / Open Source VR etc)

Could also integrate that tamper resistant name/label idea i had a while back

All in all this is a neat project, and i'm excited to brainstorm/work on it!

--Eric (talk) 23:22, 26 October 2025 (UTC)