SLUUAV7C December   2013  – November 2022 BQ40Z50 , BQ40Z50-R2

 

  1.   Abstract
  2.   Trademarks
  3. 1Features
    1. 1.1 Kit Contents
    2. 1.2 Ordering Information
    3. 1.3 Documentation
    4. 1.4 bq40z50 and bq296000 Circuit Module Performance Specification Summary
  4. 2bq40z50EVM Quick Start Guide
    1. 2.1 Items Needed for EVM Setup and Evaluation
    2. 2.2 Software Installation
    3. 2.3 EVM Connections
    4. 2.4 Update Firmware
  5. 3Battery Management Studio
    1. 3.1 Registers Screen
    2. 3.2 Setting Programmable bq40z50 Options
    3. 3.3 Calibration Screen
      1. 3.3.1 Voltage Calibration
      2. 3.3.2 Temperature Calibration
      3. 3.3.3 Current Calibration
    4. 3.4 Chemistry Screen
    5. 3.5 Firmware Screen
      1. 3.5.1 Programming the Flash Memory
      2. 3.5.2 Exporting the Flash Memory
    6. 3.6 Advanced Comm SMB Screen
  6. 4bq40z50EVM Circuit Module Schematic
    1. 4.1 Pre-Charge
    2. 4.2 LED Control
    3. 4.3 Emergency Shutdown
    4. 4.4 Testing Fuse-Blowing Circuit
    5. 4.5 PTC Thermistor
  7. 5Circuit Module Physical Layouts
    1. 5.1 Board Layout
    2. 5.2 Schematic
  8. 6Bill of Materials
  9. 7Related Documentation from Texas Instruments
  10. 8Revision History

3.3.3 Current Calibration

The Board Offset calibration option is not offered in Battery Management Studio, because it is not required when using the bq40z50EVM. The Board Offset calibration option is available in bqProduction.

  • Connect and measure a 2-A current source from 1N (–) and Pack– (+) to calibrate without using the FETs. (TI does not recommend calibration using the FETs.)
  • Enter –2000 in the Applied Current field and select the Calibrate Current box.
  • Press the Calibrate Gas Gauge button to calibrate.
  • Deselect the Calibrate Current box after current calibration has completed.
Note:

Current can also be calibrated using the FETs. Measure the current in the discharge path and enter this value in the Applied Current field.