# BMS

**Repository Path**: icar/BMS

## Basic Information

- **Project Name**: BMS
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2025-06-14
- **Last Updated**: 2025-06-14

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

Battery Management System
=======

![BMS PCB Assembled v1](https://raw.githubusercontent.com/nseidle/BMS/master/v1%20Assembled.jpg)

![BMS PCB Layout](https://raw.githubusercontent.com/nseidle/BMS/master/Board%20Layout.png)

This is a breakout board for the BQ76940. This configuration allows for 15 cells to be read. There is no safety cut off.

This is a dangerous board that exposes the user to over 48VDC and many amps. Please use responsibly.

v1 of the board is functional. Firmware is working. Most functions are written. 

![BMS PCB Layout v2](https://raw.githubusercontent.com/nseidle/BMS/master/v2%20Layout.jpg)

-> v2 of the board has full cutoff MOSFETs and charging MOSFETs. <-

![BMS Test Pack v1](https://raw.githubusercontent.com/nseidle/BMS/master/v1%20Test%20Pack.jpg)

v1 of the test pack works but has multiple errors that are fixed on v2. Number labels on the cells are reversed. Cells 9 and 14 were shorted to bring the voltage back down to 48V. The clips are very close together so plastic insulators were glued in place.

License Information
-------------------

This code is public domain but you buy me a beer if you use this and we meet someday ([Beerware license](http://en.wikipedia.org/wiki/Beerware)).