TIDUEY5 January   2021

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Test Setup
    3. 3.3 Test Results
  9. 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 Support Resources
    4. 4.4 Trademarks
  10. 5About the Author

3 Hardware, Software, Testing Requirements, and Test Results

The key performances of the TIDA-010208 were tested in a TI lab, the end equipment used and test processes and results are described in this section.

Table 3-1 describes the connections for TIDA-010208 board.

Table 3-1 Board Connections
Connector and Pin AssignmentsFunction or Schematic NetNotes
BAT-BAT-Cell stack negative; this provides a reference for the electronics and the high current path from the cells
BAT+BAT+Cell stack positive; this provides power for the high-side driver and the high current path from the cells
PACK+PACK+Charger positive or load positive
PACK-PACK-Charger negative or load negative
P1-1GNDSBW program connector ground
P1-2SBCLKSBW program connector SBCLK
P1-3SBIOSBW program connector SBIO
P1-43V3SBW program connector 3.3 V
P2-1SCLI2C communication SCL from bq76952, bq76942, bq769142, connect SCL_MCU or EV2400 SCL
P2-2SCL_MCUI2C communication SCL from MCU
P2-3SDAI2C communication SDA from bq76952, bq76942, bq769142, connect SDA_MCU or EV2400 SDA
P2-4SDA_MCUI2C communication SDA from MCU
P3Cn(n = 0 to 16) Cell monitor, balance, and electronics power connections. P3 is the connector with battery cells.
P4-1CAN-HHigh-level CAN BUS
P4-2CAN-LLow-level CAN BUS

Use the following board selections: (1) BQ76942 for 10s, (2) BQ769142 for 14s, and (3) BQ76952 for 16s applications. When used for a variety of applications, different components should be assembled on the board based on Table 3-2.

Table 3-2 Guidance on Testing 10s, 14s, 16s Applications
ComponentBQ76952BQ76942BQ769142
R34NCNC0
R35NCNC0
R46NCNC0
R47NC0NC
R48NC0NC
R49NC0NC
R50NC0NC
R620NC0
R630NC0
R64NC0NC
R650NC0
R66NC0NC
R67NC0NC
R680NC0
R690NC0
R700NC0
R71NCNC0
Other unconnected componentsQ11, D14, C12R81, R60

Another easy way to test 10s–16s applications is to always use the BQ76952 device as the monitor, but short some input channels. Table 3-3 gives the guidance on how to do this with the TIDA-010208 board.

Table 3-3 Using the BQ76952 for Different Cell Counts Applications
Cell Count15s14s13s10s
Cell15-Cell14ShortShortShortShort
Cell14-Cell13-ShortShortShort
Cell13-Cell12--ShortShort
Cell12-Cell11---Short
Cell11-Cell10---Short
Cell10-Cell9---Short

Regarding secondary protection, the BQ77216 EVM is used to test the performance.