MSPM0 Gauge L1 Solution Guide

Abstract

This application note is created to build a description about the level1 gauge solution based on MSPM0L130x series. It only detects the voltage to calculate the system-on-chip (SoC) directly. Solution features, hardware introduction, GUI introduction, software introduction, and evaluation follow are included in it.

Project collateral discussed in this application note can be downloaded from the following URL: https://www.ti.com/lit/zip/slaaee3.

Trademarks

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All trademarks are the property of their respective owners.

1 Introduction

There are different Gauge solutions based on MSPM0. Table 1-1 shows the quick compare between them for customers to choose the suitable one. This document focuses on introducing MSPM0 Gauge L1 solution.

Table 1-1 MSPM0 Gauge Solution Compare

	MSPM0 Gauge L1	MSPM0 Gauge L2
Detected parameters	Voltage; Temperature	Voltage; Temperature; Current
Output key parameters	SOC	S0C; SOH; Remain capacity; Cycles
Used methods	Volt Gauge	Coulomb counting + Volt Gauge + Empty/Full compensation + Capacity learn
Suitable application	Output step data with low SOC accuracy	Output percentage data with high SOC accuracy
Suitable battery type	LiCO2/LiMn2O4	LiCO2/LiMn2O4/LiFePO4

The features of the level1 gauge solution based on MSPM0 are as shown:

Work after MCU power-on without factory calibration or learning cycles.
Support SOC (State of charge) and warning flag output.
Low requirement for battery chemistry parameters input.
Total solution takes about 6K flash and 1.6K SRAM.
Current consumption without UART communication (NO_OUTPUT mode) is about 3 µA.

The solution is combined of three parts. All of them can be found at MSPM0 Gauge L1 Development package.

The hardware board is used to evaluate the total solution with MSPM0L130x integrated.
Figure 1-1 MSPM0 Gauge Hardware Board
The software project based on MSPM0L130x, including the used gauge algorithm.
Figure 1-2 MSPM0 Gauge Software Project
The GUI is written with Python®, which can be used to communicate with the gauge board, run test pattern by controlling a source meter and generate battery parameters.
Figure 1-3 MSPM0 Gauge GUI Project