TIDUF32 December   2024 ADC128S102QML-SP , INA901-SP , LM117QML-SP , LM193QML-SP , LM4050QML-SP , LMP7704-SP , MSP430FR5969-SP , TMP9R00-SP , TPS7A4501-SP , TPS7H2211-SP , TPS7H5001-SP , TPS7H6003-SP

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 System Control and Processing
      2. 2.2.2 Battery Cell Monitoring
      3. 2.2.3 Temperature Sensing
      4. 2.2.4 Battery Stack Control
      5. 2.2.5 Battery Balancing
      6. 2.2.6 Power Tree and Power Sequencing
    3. 2.3 Highlighted Products
      1. 2.3.1  MSP430FR5969-SP
      2. 2.3.2  ADC128S102QML-SP
      3. 2.3.3  TLV1H103-SEP
      4. 2.3.4  TPS7H2211-SP
      5. 2.3.5  TPS7A4501-SP
      6. 2.3.6  INA901-SP
      7. 2.3.7  INA1H94-SP
      8. 2.3.8  LMP7704-SP
      9. 2.3.9  TMP9R00-SP
      10. 2.3.10 LM117QML-SP
      11. 2.3.11 LM4050QML-SP
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Software Requirements
    3. 3.3 Test Setup
    4. 3.4 Test Results
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
    2. 4.2 Tools and Software
    3. 4.3 Documentation Support
    4. 4.4 Support Resources
    5. 4.5 Trademarks
  11. 5About the Author

2.2.5 Battery Balancing

Battery cell balancing plays a role in the capacity and performance of each battery cell. This system (see Figure 2-5) involves a low-complexity passive balancing design. When the GPIO from the MCU is low there is no balancing occurring; therefore, no current is drawn from the battery cell. When the GPIO from the MCU is high, the transistor gets turned on and around 15mA is drawn from the battery cell.

TIDA-010931 Battery Balancing Figure 2-5 Battery Balancing