Lipo Fuel Gauge

luca 17/11/2012 0

In my recent review about the Li-po Rider module, I wrote that a little problem was the absence of a chip that could monitor the state of charge (SoC) of the connected battery.

You can find several IC for that function; I chose the MAX17043 by Maxim, for the following interesting features:

  • it doesn’t require an external sense resistor
  • you can use an i2c interface to talk with it

This IC isn’t friendly for hobbistics: Maxim manufactures it in packages that aren’t easy to be soldered; this is the reason why I brought from DSSCircuitsbreakout boardLipo Fuel Gauge.


That module has two JST connectors (2mm pitch), one for the battery and one to connect in cascade the system to be powered; in addition you can find the PINs for i2c signals (SDA and SCL) and for alert signal (ALRT).

I wrote an Arduino library to use the MAX17043 IC; the connection between Arduino and the Lipo Fuel Gauge module is very simple:

  • SDA -> AN4
  • SCL -> AN5
  • GND -> GND

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