SLVSMB0 June   2026

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1 Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specifications
    4. 1.4 Device Information
  6. 2 Hardware
    1. 2.1 Hardware Requirements
    2. 2.2 Connecting the BQ27Z855 Circuit Module to a Battery Pack
    3. 2.3 EVM Jumpers and Terminal Block Description
  7. 3 Software
    1. 3.1 System Requirements
    2. 3.2 Software Installation
    3. 3.3 Updating Firmware
    4. 3.4 Troubleshooting Unexpected Dialog Boxes
  8. 4 Using bqStudio
    1. 4.1 Starting the Program
    2. 4.2 Setting Programmable BQ27Z855 Options
    3. 4.3 Configuring the Integrated Linear Battery Charger
  9. 5 Calibrating Gauge Measurements
    1. 5.1 Voltage Calibration
    2. 5.2 Current Calibration
  10. 6 Chemical ID
    1. 6.1 Chemical ID Selection Process
    2. 6.2 Hardware Requirements and Setup
    3. 6.3 Logging Data in bqStudio
    4. 6.4 GPCChem Tool
    5. 6.5 Programming a Chemical ID
    6. 6.6 Further Resources for Chemical ID Process
  11. 7 Learning Cycle and Golden Image
    1. 7.1 Learning Cycle Process Description
    2. 7.2 Data Memory Configuration
    3. 7.3 Learning Cycle Steps
    4. 7.4 Low Temperature Optimization
    5. 7.5 Creating the Golden Image File
    6. 7.6 Programming the Golden Image File
  12. 8 Gauge Communication
    1. 8.1 Advanced Communication in bqStudio
    2. 8.2 Standard Data Commands
    3. 8.3 Manufacturer Access Commands
    4. 8.4 Further Resources on Gauge Communication
  13. 9 BQ27Z855-Based Circuit Module
    1. 9.1 Circuit Module Connections
    2. 9.2 Pin Descriptions
  14. 10Hardware Design Files
    1. 10.1 Schematic
    2. 10.2 Bill of Materials (BOM)
    3. 10.3 PCB Layouts
  15. 11Additional Information
    1.     Trademarks

2.3 EVM Jumpers and Terminal Block Description

The following section describes the critical jumpers and their purpose on this board:

  1. J1 – Battery Input: This terminal block is the input for the positive and negative leads of your 1SXP battery pack.
  2. J2 – Charger/Load Connection: This terminal block is the input/output for the charger/load. Two of the connections are for PACK- and two of the connections are for PACK+.
  3. J3 – External Temperature Sensor Connection: This terminal block connects one lead of an external temperature sensor to the TS pin of the BQ27Z855 and the other lead to BAT- (GND). An external temperature sensor must be present for the gauge to report an accurate temperature if the gauge is configured for an external temperature measurement. Refer to the BQ27Z855 Technical Reference Manual for directions on how to configure the BQ27Z855 for an external temperature sensor.
  4. J4 - Interrupt Pin Output (INT): This terminal block connects to the INT pin of the BQ27Z855. Both connections on this terminal block connect to the INT pin.
  5. J5 – I2C Header Connection: This connector is used for I2C communication with the BQ27Z855 and is used to interface with the EV2400.