SLVSMB0 June   2026

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specifications
    4. 1.4 Device Information
  6. Hardware
    1. 2.1 Hardware Requirements
    2. 2.2 Connecting the BQ27Z855 Circuit Module to a Battery Pack
    3. 2.3 EVM Jumpers and Terminal Block Description
  7. Software
    1. 3.1 System Requirements
    2. 3.2 Software Installation
    3. 3.3 Updating Firmware
    4. 3.4 Troubleshooting Unexpected Dialog Boxes
  8. Using bqStudio
    1. 4.1 Starting the Program
    2. 4.2 Setting Programmable BQ27Z855 Options
    3. 4.3 Configuring the Integrated Linear Battery Charger
  9. Calibrating Gauge Measurements
    1. 5.1 Voltage Calibration
    2. 5.2 Current Calibration
  10. Chemical ID
    1. 6.1 Chemical ID Selection Process
    2. 6.2 Hardware Requirements and Setup
    3. 6.3 Logging Data in bqStudio
    4. 6.4 GPCChem Tool
    5. 6.5 Programming a Chemical ID
    6. 6.6 Further Resources for Chemical ID Process
  11. Learning Cycle and Golden Image
    1. 7.1 Learning Cycle Process Description
    2. 7.2 Data Memory Configuration
    3. 7.3 Learning Cycle Steps
    4. 7.4 Low Temperature Optimization
    5. 7.5 Creating the Golden Image File
    6. 7.6 Programming the Golden Image File
  12. Gauge Communication
    1. 8.1 Advanced Communication in bqStudio
    2. 8.2 Standard Data Commands
    3. 8.3 Manufacturer Access Commands
    4. 8.4 Further Resources on Gauge Communication
  13. BQ27Z855-Based Circuit Module
    1. 9.1 Circuit Module Connections
    2. 9.2 Pin Descriptions
  14. 10Hardware Design Files
    1. 10.1 Schematic
    2. 10.2 Bill of Materials (BOM)
    3. 10.3 PCB Layouts
  15. 11Additional Information
    1.     Trademarks

GPCChem Tool

Convert the .log file to a .csv file by renaming the file format. Create a blank .csv file and copy into the first, second, third, and fourth columns the time, voltage, current, and temperature, respectively. Ensure that your units for each of these are seconds, millivolts, milliamps, and Celsius. The first row can be names for each of the columns, which the tool will skip assuming there is only one row of names before the data begins. Figure 6-4 is an example of the required .csv file formatting as well as the first few rows of data.

BQ27Z855EVM Cell Formatting for .csv Figure 6-4 Cell Formatting for .csv
  1. Save this created file with the name “roomtemp_rel_dis_rel.csv”.
  2. Create a second file "config.txt" and write the following in it:
    1. ProcessingType = 2
    2. NumCellSeries = 1
    3. ElapsedTimeColumn = 0
    4. VoltageColumn = 1
    5. CurrentColumn = 2
    6. TemperatureColumn = 3
  3. Create a folder with any name. Put both the roomtemp_rel_dis_rel.csv and config.txt files in this folder, and convert the folder to a .zip file. Submit this .zip file to the GPC Tool through the web interface found on ti.com.

After processing, an e-mail with a report that indicates the results of the tool’s process is sent to the e-mail address you provided when logging into ti.com to use the GPC Tool. The report contains the selected ChemID and a list of additional ChemIDs that satisfy the “less than 3%” error criteria. For example, this can be useful to verify that a ChemID used previously is still suitable. If any formatting mistakes or other errors are present, they are reflected in the report.