SLVSMB0
June 2026
1
Description
Features
4
1
Evaluation Module Overview
1.1
Introduction
1.2
Kit Contents
1.3
Specifications
1.4
Device Information
2
Hardware
2.1
Hardware Requirements
2.2
Connecting the BQ27Z855 Circuit Module to a Battery Pack
2.3
EVM Jumpers and Terminal Block Description
3
Software
3.1
System Requirements
3.2
Software Installation
3.3
Updating Firmware
3.4
Troubleshooting Unexpected Dialog Boxes
4
Using bqStudio
4.1
Starting the Program
4.2
Setting Programmable BQ27Z855 Options
4.3
Configuring the Integrated Linear Battery Charger
5
Calibrating Gauge Measurements
5.1
Voltage Calibration
5.2
Current Calibration
6
Chemical ID
6.1
Chemical ID Selection Process
6.2
Hardware Requirements and Setup
6.3
Logging Data in bqStudio
6.4
GPCChem Tool
6.5
Programming a Chemical ID
6.6
Further Resources for Chemical ID Process
7
Learning Cycle and Golden Image
7.1
Learning Cycle Process Description
7.2
Data Memory Configuration
7.3
Learning Cycle Steps
7.4
Low Temperature Optimization
7.5
Creating the Golden Image File
7.6
Programming the Golden Image File
8
Gauge Communication
8.1
Advanced Communication in bqStudio
8.2
Standard Data Commands
8.3
Manufacturer Access Commands
8.4
Further Resources on Gauge Communication
9
BQ27Z855-Based Circuit Module
9.1
Circuit Module Connections
9.2
Pin Descriptions
10
Hardware Design Files
10.1
Schematic
10.2
Bill of Materials (BOM)
10.3
PCB Layouts
11
Additional Information
Trademarks
EVM User's Guide
BQ27Z855 Single Cell Battery Fuel Gauge Evaluation Module User's Guide