SLUUCH4A October   2021  – October 2023 BQ27Z746

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Software Setup
    1. 1.1 System Requirements
    2. 1.2 Software Installation
  5. 2 Troubleshooting Unexpected Dialog Boxes
  6. 3 Hardware Setup
    1. 3.1 Hardware Requirements
    2. 3.2 Connecting the BQ27Z746 Circuit Module to a Battery Pack
    3. 3.3 EVM Jumpers Description
  7. 4 Using bqStudio
    1. 4.1 Starting the Program
    2. 4.2 Setting Programmable BQ27Z746 Options
  8. 5 Calibrating Gauge Measurements
    1. 5.1 Voltage Calibration
    2. 5.2 Current Calibration
  9. 6 Protections
    1. 6.1 Protector Calibration in bqStudio
    2. 6.2 Protector Threshold Process
  10. 7 Chemical ID
    1. 7.1 Chemical ID Selection Process Description
    2. 7.2 Hardware Requirements and Setup
    3. 7.3 Logging Data in bqStudio
    4. 7.4 GPCChem Tool
    5. 7.5 Programming a Chemical ID
    6. 7.6 Further Resources for Chemical ID Process
  11. 8 Learning Cycle and Golden Image
    1. 8.1 Learning Cycle Process Description
    2. 8.2 Data Memory Configuration
    3. 8.3 Learning Cycle Steps
    4. 8.4 Low Temperature Optimization
    5. 8.5 Creating the Golden Image File
    6. 8.6 Programming the Golden Image File
  12. 9 Gauge Communication
    1. 9.1 Advanced Communication in bqStudio
    2. 9.2 Standard Data Commands
    3. 9.3 Manufacturer Access Commands
    4. 9.4 Further Resources on Gauge Communication
  13. 10BQ27Z746-Based Circuit Module
    1. 10.1 Circuit Module Connections
    2. 10.2 Pin Descriptions
  14. 11Circuit Module Physical Layout, Bill of Materials, and Schematic
    1. 11.1 Board Layout
    2. 11.2 Schematic
    3. 11.3 Bill of Materials
    4. 11.4 BQ27Z746 Circuits Module Performance Specification Summary
  15.   Revision History

Abstract

The BQ27Z746EVM comes with the BQ27Z746 integrated gas gauge and protection IC with external high-side protection N-Channel FETs. This user's guide will walk you through the following tasks:

  • Connect the necessary components together to power up the EVM
  • Installation of the necessary Texas Instruments software tools
  • Setup of the EVM with additional hardware and software
  • Calibrate the BQ27Z746 voltage and current readings
  • Set gauge hardware protections
  • Perform the Chemical ID selection process
  • Optimize gauge reporting with a Learning Cycle
  • Create and upload a Golden Image
  • Use Advanced Communication with the gauge

These tasks will guide users of the BQ27Z746EVM through the process required to prepare for production with the BQ27Z746 by creating a "Golden Pack". A Golden Pack is a single gauge and battery that has had optimization and configuration processes performed on it during the development stage. The resulting values are extracted from the Golden Pack gauge into the “Golden File” or “Golden Image”. The Golden File is a flash image programmed into every gauge used in mass production as there should be minimal pack-to-pack variation during a well-controlled manufacturing process. The Impedance Track™ algorithm enables the gauge to continue to learn once a pack is deployed to account for manufacturing differences, field conditions, and battery degradation over its lifetime.