BatteryMonitor

NMEA2000 DC Monitor

High accuracy current and battery voltage monitoring with 2500V isolation from N2K bus

Derived from and example by ttlappalainen NMEA2000_CAN - NMEA2000 library for Arduino https://github.com/ttlappalainen/NMEA2000

Parts list:

Teensy 3.1/3.2 board

INA226AIDGSR 36-V, Bi-Directional, Ultra-High Accuracy, Low-/High-Side, I2C Out Current/Power Monitor

ISO1050DUB Isolated CAN Transceiver

78L05 linear regulator for CAN output driver

7805C linear regulator for Teensy

Notes:

Kalman filter values are tested at Voltage and Current sampling of 20ms SoC calulation needs more testing

Teensy regulator cant handle Alternator voltages so 7805C is used to bring it down. 12V > Polyswitch fuse > 7805C linear regulator > Teensy 3.3V power for INA226 and ISO1050 from Teensy 5V power ISO1050 CAN for output driver comes from N2K bus

INA226 is tiny device use MSOP10 SMD to DIP10 Adapter PCB Board (ebay)

PGN's supported

PGN 127508 - Battery Status (every second)

Voltage, Current

PGN 127506 - DC Status (every second)

State of Charge, Ripple voltage#

PGN 127513 - Battery Configuration (every minute)

Detailed battery info

To do: Configuration e.g. Battery Amp hours stored in EEPROM

Update configuration over serial Update configuration over N2K