SLUUCW4 November   2023 BQ27Z558

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Hardware Setup
      1. 2.1.1 Hardware Requirements
      2. 2.1.2 Connecting the BQ27Z558 Circuit Module to a Battery Pack
      3. 2.1.3 EVM Jumpers Description
    2. 2.2 Chemical ID
      1. 2.2.1 Chemical ID Selection Process Description
      2. 2.2.2 Hardware Requirements and Setup
      3. 2.2.3 Logging Data in bqStudio
      4. 2.2.4 GPCChem Tool
      5. 2.2.5 Programming a Chemical ID
      6. 2.2.6 Further Resources for Chemical ID Process
    3. 2.3 Calibrating Gauge Measurements
      1. 2.3.1 Voltage Calibration
      2. 2.3.2 Current Calibration
    4. 2.4 Learning Cycle and Golden Image
      1. 2.4.1 Learning Cycle Process Description
      2. 2.4.2 Data Memory Configuration
      3. 2.4.3 Learning Cycle Steps
      4. 2.4.4 Low Temperature Optimization
      5. 2.4.5 Creating the Golden Image File
      6. 2.4.6 Programming the Golden Image File
    5. 2.5 BQ27Z558-Based Circuit Module
      1. 2.5.1 Circuit Module Connections
      2. 2.5.2 Pin Description
  8. 3Software
    1. 3.1 Software Setup
      1. 3.1.1 System Requirements
      2. 3.1.2 Software Installation
    2. 3.2 Troubleshooting Unexpected Dialog Boxes
    3. 3.3 Using bqStudio
      1. 3.3.1 Starting the Program
      2. 3.3.2 Setting Programmable BQ27Z558 Options
    4. 3.4 Gauge Communication
      1. 3.4.1 Advanced Communication in bqStudio
      2. 3.4.2 Standard Data Commands
      3. 3.4.3 Manufacturer Access Commands
      4. 3.4.4 Further Resources on Gauge Communication
  9. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
    3. 4.3 Bill of Material
  10. 5Additional Information
    1.     Trademarks

1.1 Introduction

This user's guide guides 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 BQ27Z558 voltage and current readings.
  • 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.
  • Bring up the EVM for a basic chemistry and accuracy cycle check.
  • Evaluate the functionality of the BQ27Z558 design under different charge and discharge conditions.

These tasks guide users of the BQ27Z558EVM through the process required to prepare for production with the BQ27Z558 by creating a Golden Pack. A Golden Pack is a single gauge and battery that has had optimization and configuration processes performed 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 is 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 the lifetime.