Gravity: I2C 3.7V Li Battery Fuel Gauge

Introduction 3.7V lithium batteries are commonly used in many projects. However, the remaining power and voltage of the lithium battery are highly nonlinear. We can only roughly judge whether the battery is full or almost empty according to its voltage. The Gravity I2C 3.7V Lithium Battery Fuel Gauge employs Gravity I2C interface, ultra-low operating current, and real-time tracking of the relative state of charge (SOC) of the battery through Maxim's patented algorithm, eliminating the need for full-to-empty relearning and offset accumulation errors. Plug and play to accurately measure the voltage and remaining power of the battery. The module also features as a low battery power alert interrupt function. When the battery power falls below specified threshold, the ALR pin generates a falling pulse to trigger the external interrupt of the controller.

You will find it a great help to estimate the battery life by learning the power consumption of the system with this module. In the solar powered projects, it helps to record the status of the battery power change in a day or even months, which benefits to understand the power balance of charge and discharge of the solar system.

Features

Maxim's Patented Algorithm, accurate voltage and remaining power readings of lithium battery

No Full-to-Empty Relearning Process, No Offset Accumulation Errors, Plug and Play

Wide Input Voltage, Compatible with 3.3V and 5V Controllers

Programmable Low Power Alert Interrupt Threshold

Battery Reverse Connection Protection

Applications

Solar Weather Station, Street Light

Lithium Battery Charger

Robotics

Specification

Input Voltage (VCC): 3.3V~6.0V

Battery Input Voltage (BAT IN): 2.5V~4.2V

Battery Type(BAT IN): 3.7V Li-polymer/Li-ion battery

Operating Current: 50 uA

Interface: Gravity I2C (logic level: 0-3.3V)

Dimension: 22.0*30.0mm/0.86*1.18 inches

Projects Project 1. Smart Compost Bin Monitoring System -Based on 4G IoT and SHT20

Introduction:

The other day my friend asked me to help him remake his compost bin, he wants a device that allows him to remotely get the real-time temperature and humidity inside. So I add some electronic parts on it.

Shipping List

Gravity: I2C 3.7V Li Battery Fuel Gauge x1

XH2.54-2P Header x1

Gravity-4P I2C/ UART Sensor Wire x1

Documents

Product wiki

esphome support