I’m currently in the process of designing and building a battery balancer and monitoring system/circuits for a home made DIY Powerwall. I’m aiming to use this forum to log the design decisions and gather comments and improvements from the wider community. This is some useful background reading fro…

I bought the 10k thermistors (±3%) by epcos on mouser for 34 cents each. I was wondering if there is a difference between them and the cheap ones from aliexpress with a “rated” ±1%.

lol i know i managed to hand solder the first board but won’t do that in a rush

Because I am not paralleling cells I only require 0.4A. Nowhere near what you will need. Brian

[image] Jman_brosef: I think I’m going to put the thermistors on the back of the board so it can be inserted between the batteries like adam welch did. It might work, it might not! The thermistor is designed to detect a high temperature when the load resistor is on (50+ degrees), so it can b…

Hi guys looks like I’m late to the party here Have emonpi and building two DIY powerwalls one from 18650 the other Phev batteries Is there a quick start or build of materials guide ?

There is a parts list here: [image] GitHub - stuartpittaway/diyBMS: Do it yourself battery management system for... Do it yourself battery management system for Lithium ion battery packs/cells - GitHub - stuartpittaway/diyBMS: Do it yourself battery management system for Lithium ion batt…

thanks you will order the components this week have a steady steam if stuff from ali express every week postman probably wonders what the hell I do never had a board printed before though what files needed to be sent to the maker etc is one recommended sorry for the questions thanks Arden

You need to upload the Gerbers files. Instructions: Download github repositorty and unzip it Open the Bms Curcuit folder Now you should see a folder called Gerbers. Zip the Gerber folder so it can be sent to pcb maker people.

Yeah. I get a least two small packages every day from china lol

very impressed can see how it manages balancing and monitoring Sorry for the multiple questions can it also stop over charging and discharge would like to keep my batteries in side a safe delta of voltages to have them stay in a healthy state See on the git hub page about been in the UK and have …

DIY Lithium Battery Balancer and monitoring (BMS)

Hardware

Jman_brosef (Jman Brosef) 2 April 2018 00:17 184

There is a parts list here:

Here is a list of where I bought my parts:

Youtube Videos: