Analog Devices MAX17048 battery fuel gauge
The max17048 platform allows you to monitor the remaining capacity of a lithium-ion battery with an Analog
Devices MAX17048 or MAX17049 fuel gauge
(datasheet) in
ESPHome. The ModelGauge algorithm in the chip tracks the state of charge over a wide range of charge and
discharge profiles without a sense resistor or relearn cycles. The MAX17048 monitors one cell and the MAX17049
two cells in series; the two chips are otherwise the same. It uses the I²C Bus for
communication.
NOTE
The voltage is scaled for the MAX17048. On a MAX17049, whose voltage step is doubled for its two cells,
battery_voltage is therefore the average voltage per cell rather than the pack voltage; a multiply: 2 filter
gives the pack voltage.
# Example configuration entrysensor: - platform: max17048 battery_voltage: name: Battery Voltage battery_level: name: Battery LevelConfiguration variables
Section titled “Configuration variables”- battery_voltage (Optional): The cell voltage in volts. All options from Sensor.
- battery_level (Optional): The state of charge in percent. All options from Sensor.
- rate (Optional): The rate at which the cell is charging or discharging, in percent per hour, positive while charging. All options from Sensor.
- address (Optional, int): The I²C address of the device. Defaults to
0x36. - update_interval (Optional, Time): How often to read the gauge.
Defaults to
60s.