SLVUDW8 May   2026

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1 Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specifications
    4. 1.4 Device Information
  6. 2 Hardware Setup
    1. 2.1 Hardware Requirements
    2. 2.2 Connecting the BQ27Z846 Circuit Module to a Battery Pack
    3. 2.3 EVM Jumpers and Terminal Block Description
  7. 3 Software Setup
    1. 3.1 System Requirements
    2. 3.2 Software Installation
    3. 3.3 Updating Firmware
    4. 3.4 Troubleshooting Unexpected Dialog Boxes
    5. 3.5 Using bqStudio
      1. 3.5.1 Starting the Program
      2. 3.5.2 Setting Programmable BQ27Z846 Options
  8. 4 Calibrating Gauge Measurements
    1. 4.1 Voltage Calibration
    2. 4.2 Current Calibration
  9. 5 Chemical ID
    1. 5.1 Chemical ID Selection Process
    2. 5.2 Hardware Requirements and Setup
    3. 5.3 Logging Data in bqStudio
    4. 5.4 GPCCHEM Tool
    5. 5.5 Programming a Chemical ID
    6. 5.6 Further Resources for Chemical ID Process
  10. 6 Learning Cycle and Golden Image
    1. 6.1 Learning Cycle Process Description
    2. 6.2 Data Memory Configuration
    3. 6.3 Learning Cycle Steps
    4. 6.4 Low Temperature Optimization
    5. 6.5 Creating the Golden Image File
    6. 6.6 Programming the Golden Image File
  11. 7 Gauge Communication
    1. 7.1 Advanced Communication in bqStudio
    2. 7.2 Standard Data Commands
    3. 7.3 Manufacturer Access Commands
    4. 7.4 Further Resources on Gauge Communication
  12. 8 BQ27Z846-Based Circuit Module
    1. 8.1 Circuit Module Connections
    2. 8.2 Pin Descriptions
  13. 9 Hardware Design Files
    1. 9.1 Board Layout
    2. 9.2 Schematic
    3. 9.3 Bill of Materials
  14. 10Additional Information
    1.     Trademarks
  15. 11Revision History

4.2 Current Calibration

Set up the EVM, a voltage power supply (use a battery or a bench power supply), and a power supply capable of supplying a constant current with milliamp precision. Connect the constant-current supply to the BAT- and PACK- headers. The exact circuit layout is shown in Figure 4-2. The constant-current supply is shown as being attached to the test point of BAT- but can also be attached to the BAT- header, as well.

BQ27Z846 Current Calibration Hardware Setup Figure 4-2 Current Calibration Hardware Setup

As shown in Figure 4-3, from the Calibration window in bqStudio, enter the precise value of current being supplied, click to check the Calibrate Current box, and then press the Calibrate Gas Gauge button.

BQ27Z846 Current Calibration in bqStudio Figure 4-3 Current Calibration in bqStudio