The "Low Cost BMS" is a project I used in my car, and should be ideal for these - low cost but just fancy enough to do all that is required.
As is the tendency for these sorts of projects, there are multiple versions out there. People tend to grab the source files and modify it to fit their own circumstances.
This is Nevilleh's original AEVA forum on the topic: viewtopic.php?f=17&t=2753&hilit=low+cost+BMS
The topic went on a few tangents over the years...
This is a version that I made for my car: https://sourceforge.net/p/low-cost-bms/wiki/Home/
I think this will be fine for home storage.
The design has a single master unit, with a display and two buttons.
Then there is a circuit board on each cell. The celltop module fits onto the terminals, so each type of cell needs a specific board made.
Despite having too many projects on the go at the moment, I think I'll make a version of the Low Cost BMS for these cells. I'll get one of the circuit board manufacturing companies to make the boards for me, and it will be cheaper per unit to get a larger quantity done.
If you also have these cells, and would like to use the Low Cost BMS, the process would be:
- Buy the components (I'll be making a list of what to get and from where)
- Buy a programmer thingi (Again, I'll let you know which one and from where)
- Buy the circuit boards (Let me know how many you want and I'll get them made - then buy them from me)
- Assemble the components on the boards
- Programme the microcontrollers (master board and each module board) using the programmer thing connected to your computer
- Hook them together and test
Let me know if you are interested.
Especially if you are interested in doing some of the work! (re-design the celltop module for instance, or source the components).
Post a reply here, or send me a private message through this forum, or email me at: firstname.lastname@example.org