EasyBMS

Simple Wifi based BMS for battery modules from EVs

This battery management system is a combination of an openhardware board, the IC LTC6804-1 and a WLAN-enabled controller ESP32-C6 and a bit of opensource code.

12-cell passive BMS per board with a WLAN interface suitable for lithium-ion NMC battery modules.

Cost per BMS board <20€

Balancing across modules possible through a master unit

Two operating modes

Single - the cells of one battery module are balanced standalone with only one BMS board
Multi - the cells of several battery modules are balanced via several, distributed BMS boards and coordinated via head unit

Balancing with relatively low current ~40mA, which is sufficient for EV battery modules. All BMS data is provided to MQTT

Build

• git clone https://github.com/SunshadeCorp/EasyBMS-slave.git
• cd EasyBMS-slave
• git submodule init
• git submodule update
• cd include
• cp config.h.example config.h
• edit config.h to your setup
• build with Visual Studio Code and PlatformIO