User's Guide
SLUU353 – June 2009
bq20z65EVM-001 SBS 1.1 Impedance Track™ Technology
Enabled Battery Management Solution Evaluation Module
This evaluation module (EVM) is a complete evaluation system for the bq20z65/bq29412 battery
management system. The EVM includes one bq20z65/bq29412 circuit module and a link to
Windows™-based PC software. The circuit module includes one bq20z65 integrated circuit (IC), one
bq29412 IC, and all other onboard components necessary to monitor and predict capacity, perform cell
balancing, monitor critical parameters, protect the cells from overcharge, over-discharge, short-circuit, and
overcurrent in 2-, 3- or 4-series cell Li-ion or Li-polymer battery packs. The circuit module connects directly
across the cells in a battery. With the EV2300 interface board and software, the user can read the
bq20z65 data registers, program the chipset for different pack configurations, log cycling data for further
evaluation, and evaluate the overall functionality of the bq20z65/bq29412 solution under different charge
and discharge conditions.
Contents
1 Features ....................................................................................................................... 2
2 bq20z65-Based Circuit Module ............................................................................................ 2
3 bq20z65 Circuit Module Schematic ....................................................................................... 3
4 Circuit Module Physical Layouts and Bill of Materials .................................................................. 3
5 EVM Hardware and Software Setup ...................................................................................... 8
6 Troubleshooting Unexpected Dialog Boxes .............................................................................. 8
7 Hardware Connection ....................................................................................................... 8
8 Operation ..................................................................................................................... 9
9 Calibration Screen.......................................................................................................... 12
10 Pro (Advanced) Screen .................................................................................................... 13
11 Related Documentation from Texas Instruments ...................................................................... 14
List of Figures
1 bq20z65EVM-001 Layout – Silk Screen .................................................................................. 4
2 Top Assembly ................................................................................................................ 4
3 Top Layer ..................................................................................................................... 4
4 Bottom Layer ................................................................................................................. 5
5 Bottom Assembly ............................................................................................................ 5
6 Schematic ..................................................................................................................... 7
7 bq20z65 Circuit Module Connection to Cells and System Load/Charger ............................................ 9
8 SBS Data Screen........................................................................................................... 10
9 Data Flash Screen, 1st Level Safety Class ............................................................................. 11
10 Calibration Screen.......................................................................................................... 13
11 Pro (Advanced) Screen .................................................................................................... 14
List of Tables
1 Ordering Information ........................................................................................................ 2
2 Components and Flash-Memory Settings for Different Precharge Modes ........................................... 3
3 Bill of Materials ............................................................................................................... 5
4 Performance Specification Summary ..................................................................................... 8
5 Circuit Module to EV2300 Connections ................................................................................... 9
SLUU353 – June 2009 bq20z65EVM-001 SBS 1.1 Impedance Track™ Technology 1
Enabled Battery Management Solution Evaluation Module
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