TIDUF44 January   2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Highlighted Products
      1. 2.2.1 BQ76907
      2. 2.2.2 BQ76905
      3. 2.2.3 BQ77207
      4. 2.2.4 MSPM0L1106
      5. 2.2.5 TCAN1042
      6. 2.2.6 TPSM365R6V5
      7. 2.2.7 TLV704
      8. 2.2.8 TMP61
  9. 3System Design Theory
    1. 3.1 Primary Protection Design
    2. 3.2 Secondary Protection
    3. 3.3 Other Circuit Design
  10. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Requirements
    2. 4.2 Software Requirements
    3. 4.3 Test Setup
    4. 4.4 Test Results
      1. 4.4.1 Cell Voltage Accuracy
      2. 4.4.2 Pack Current Accuracy
      3. 4.4.3 Protection
      4. 4.4.4 Cell Balancing
      5. 4.4.5 Working Modes Transition
      6. 4.4.6 Thermal Performance
  11. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
    2. 5.2 Tools and Software
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  12. 6About the Author

4.3 Test Setup

Follow this procedure for board bring-up and testing, also refer to Figure 4-1:

  • Connect Cell7–Cell1 from left to right in J8. If using less than 7 cells, short the corresponding pins according to the BQ76907 and BQ76905 data sheet.
  • Connect BAT+ to Cell7 and BAT– to Cell0
  • Using the MSPM0L1306 LaunchPad, connect to J2, J3 or only connect J2:I2C pin with EV2400 and connect to the personal computer (PC)
  • Choose whether to connect J5, J6, J7, or J8, according to the need
  • Connect load in PACK+ or PACK–

The test set up for the discharge and charge tests were done in the TI lab.

Figure 4-2 shows the charge process setup example. DC source 1 configurations: 22 V–3 A. DC source 2 configurations: 18 V–0.5 A. Electronic load configurations: 18-V CV mode (For 5s test).

GUID-20231010-SS0I-TKW3-SFZJ-GNBKRFBBFKFC-low.svgFigure 4-2 Charge Setup

Figure 4-3 shows the discharge process setup example. DC source 1 configurations: 18 V–10 A. Electronic load configurations: CC mode.

GUID-20231010-SS0I-T455-D2VM-57L0H4FN6TBP-low.svgFigure 4-3 Discharge Setup