User's Guide
SLUU275 – October 2006
bq20z95EVM-001 SBS 1.1 Impedance Track™ Technology
Enabled Battery Management Solution Evaluation Module
This evaluation module (EVM) is a complete evaluation system for the bq20z95/bq29412 battery
management system. The EVM includes one bq20z95/bq29412 circuit module, an EV2300 PC interface
board for gas gauge interface, a PC USB cable, and Windows™-based PC software. The circuit module
includes one bq20z95 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 bq20z95 data registers, program the chipset
for different pack configurations, log cycling data for further evaluation, and evaluate the overall
functionality of the bq20z95/bq29412 solution under different charge and discharge conditions.
Contents
1
Features
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2
2
bq20z95-Based Circuit Module
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2
3
bq20z95 Circuit Module Schematic
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3
4
Circuit Module Physical Layouts and Bill of Materials
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4
5
EVM Hardware and Software Setup
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9
6
Troubleshooting Unexpected Dialog Boxes
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9
7
Hardware Connection
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9
8
Operation
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11
9
Calibration Screen
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13
10
Pro (Advanced) Screen
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15
11
Pack Assembly and The bq20z95
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16
12
Related Documentation from Texas Instruments
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17
Trademarks
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17
List of Figures
1
bq20z95EVM-001 Layout (Silk Screen)
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4
2
Top Assembly
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5
3
Top Layer
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5
4
Bottom Layer
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5
5
Bottom Assembly
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6
6
Schematic
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8
7
bq20z95 Circuit Module Connection to Cells and System Load/Charger
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10
8
SBS Data Screen
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11
9
Data Flash Screen, 1st Level Safety Class
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12
10
Calibration Screen
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14
11
Pro (Advanced) Screen
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15
12
Connection Sequence
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16
13
Fuel Gauging Command
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16
List of Tables
1
Ordering Information
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2
2
Components and Flash-Memory Settings for Different Precharge Modes
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4
3
Bill of Materials
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7
SLUU275 – October 2006
bq20z95EVM-001 SBS 1.1 Impedance Track™ Technology
1
Enabled Battery Management Solution Evaluation Module
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