Do it yourself battery management system for Lithium ion battery packs/cells. 

SOLDERING & FIRMWARE UPLOAD REQUIRED

Designed by Stuart Pittaway

Note: This listing is a unpopulated PCB. 

Features

• Autonomous cell voltage balancing

• Internal temperature monitoring

• External temperature monitoring

• Optoisolated serial port

• Spare input/output for 3rd party use

• ROHS Components/Lead free soldering

Includes

• diyBMS controller module PCB only

Does not Include 

• WeMos D1 Mini Pro ESP Module 

Documentation 

• Build guide & Hardware Repo: https://github.com/stuartpittaway/diyBMSv4
• ESP Controller firmware & upload instructions: https://github.com/stuartpittaway/diyBMSv4Code/tree/master/ESPController
  

Support 

Forum: https://community.openenergymonitor.org/c/hardware/diybms/