SLUUCJ6 November   2023

 

  1.   1
  2.   BQ76907 Evaluation Module
  3.   Trademarks
  4. 1Features
    1. 1.1 Kit Contents
    2. 1.2 Ordering Information
    3. 1.3 BQ76907 Circuit Module Performance Specification Summary
    4. 1.4 Required Equipment
  5. 2BQ76907 EVM Quick Start Guide
    1. 2.1 Before You Begin
    2. 2.2 Quick Start
  6. 3Battery Management Studio Software
    1. 3.1 System Requirements
    2. 3.2 Installing BQStudio
    3. 3.3 BQ76907 bqz File Installation
    4. 3.4 BQStudio Operation and Registers View
    5. 3.5 Commands
    6. 3.6 Data Memory
      1. 3.6.1 Entering, Saving, and Loading Configuration
    7. 3.7 Command Sequences
  7. 4BQ76907 Circuit Module Use
    1. 4.1 Cell Simulator
    2. 4.2 Evaluating with Load Current
    3. 4.3 Evaluating Charge and Discharge Currents
    4. 4.4 Evaluating with Simulated Current
    5. 4.5 Reducing the Cell Count
    6. 4.6 Connecting Cells
    7. 4.7 Connecting to a Host
    8. 4.8 Hardware Configuration
      1. 4.8.1 Configuration Jumpers
    9. 4.9 Configuration Register Programming
  8. 5BQ76907EVM Circuit Module Physical Construction
    1. 5.1 Board Layout
    2. 5.2 Bill of Materials
    3. 5.3 Schematic

2.2 Quick Start

The BQ76907 registers must be configured to enable most protections, select the monitored cells, and enable the protection FETs on the EVM. This quick start section does not describe current protection settings.

These steps describe quick connection of the BQ76907 EVM to demonstrate operation of the AFE portion of the EVM. For more detailed descriptions, refer to other sections of the user guide.

Refer to Figure 2-1 for the following steps.

  1. Download the BQSTUDIO software from the tool folder link www.ti.com/tool/BQSTUDIO or search from www.ti.com.
  2. Install the BQStudio software (see Section 3.2).
  3. Install the cell simulator shunts.
  4. Position shunts for the I2C to MCU connection.
  5. Attach the on-board communication adapter USB connector to the PC using USB cable.
  6. Connect a 0-V DC power supply capable of 250 mA minimum between the “BAT-” and "7P" terminals and adjust to approximately 21 V.
  7. Start the BQStudio software. The GUI will open with a register display if communication to the BQ76907 is made. Click on the Scan button to enable repeated update of the display. The power supply may be adjusted within range of the part to observe voltage changes in the GUI register display.
  8. Select the Data Memory button in the BQStudio window.
  9. Select the Settings button. Set the Enabled Protections A CUV bit.

  10. Select the Protections button. Set the Cell Undervoltage Protection Threshold to 2800.

  11. In the Commands panel click on the FET_ENABLE button.
  12. In the Registers view click on the Scan icon so that the registers update periodically. Observe that the CHG and DSG bits in the Battery Status register are on. Measure the PACK voltage on the board if desired.
  13. Adjust the supply voltage to approximately 17.5 V. In the registers view observe that the DSG bit goes off.
  14. Make other adjustments as desired for evaluation. See other sections of this user guide for details of operation.
  15. When complete with this quick start demonstration, exit the BQStudio software and turn off the power supply.

Refer to other sections of this user guide for additional details.

GUID-20220718-SS0I-HH0B-DK57-VMSB7R6THBV6-low.svgFigure 2-1 EVM Connection for Basic Operation