NXP RD-HVBMSCTBUN HVBMS Battery Management Unit User Guide

NXP RD-HVBMSCTBUN HVBMS Battery Management Unit

Document information

Unit, BMU, Cell Monitoring Unit, CMU, Battery Junction Box, BJB
Abstract| This document aims to help getting started with the RD-HVBMSCTBUN HVBMS Reference Design bundle, hardware and software

Introduction

The RD-HVBMSCTBUN is a High-Voltage Battery Management System (HVBMS) Reference Design bundle. This bundle has been designed for evaluation and development purposes. The RD-HVBMSCTBUN is composed of a hardware kit and several software packages. This document details the first start-up steps to visualize the measurements performed by the system in a Graphical User Interface (GUI).

Kit content

The RD-HVBMSCTBUN bundle contains the following.

• Battery Management Unit kit
  • 1 RD-K344BMU board
  • 1 power supply (12 VDC, 5 A)
  • 1 multipurpose cable
  • 1 USB-TTL cable
  • 1 ETPL cable
• Cell Monitoring Unit kit
  • 1 RD33775ACNTEVB board
  • 4 supply cables
  • 1 ETPL cable
• Battery Junction Box kit
  • 1 RD772BJBTPLEVB board
  • 1 power cable
  • 3 high voltage measurement cables
  • 1 thermal sensor cable
  • 1 ETPL cable
• Battery Emulation kit
  • 1 BATT-14CEMULATOR board
  • 1 power supply (12 VDC, 5 A)
  • 1 adapter
  • 1 BATT-14EXTENDER board
  • 1 supply cable
• Links for the Software and Safety kits
  Note: An HVBMS Start-up kit is available to visualize cell voltage measurements at first start-up. The kit contains a GUI running on FreeMASTER (NXP Run-Time Debugging Tool) and a binary file that is preflashed on the BMU.

Getting to know the hardware

Battery management unit

The Battery Management Unit (BMU) is the control part of the Battery Management System (BMS). The BMU processes the data, makes decisions, and commands the system. The RD-K344BMU is the HVBMS Reference Design BMU. This BMU kit includes a power supply and three cables to interface with other parts of the HVBMS.

To learn more about the RD-K344BMU, visit the website associated with this reference design, or read its user manual.

Cell monitoring unit

The Cell Monitoring Unit (CMU) is the cell-sensing part of the BMS. The CMU precisely monitors cell voltages and environmental temperatures to ensure safe battery operation. The CMU also enables fast cell balancing. The RD33775ACNTEVB is the HVBMS Reference Design CMU for Electrical Transport Protocol Link (ETPL) based architectures. This CMU kit includes five cables to interface with other parts of the HVBMS.

To learn more about the RD33775ACNTEVB, visit the website associated with this reference design, or read its user manual.

Battery junction box

The Battery Junction Box (BJB) is the pack-level sensing part of the BMS. The BJB measures high voltages. This measurement allows monitoring connections of the contactors to the inverter and the charger. The BJB also precisely measures the system’s current, and monitors the battery to chassis isolation. The RD772BJBTPLEVB is the HVBMS Reference Design BJB for Electrical Transport Protocol Link (ETPL) based architectures. This BJB kit includes six cables to interface with other parts of the HVBMS.

To learn more about the RD772BJBTPLEVB, please visit the website associated with this reference design, or read its user manual.

Battery Emulation

The HVBMS Reference Design kit contains a battery emulation kit that is composed of a BATT-14CEMULATOR and a BATT-14EXTENDER board.
Note: Do not use the BATT-14CEMULATOR sliders at their maximum value as the total voltage will come close to the Battery Cell Controller’s overvoltage threshold.

First start-up

Hardware requirements

In addition to the kit contents, the following hardware is beneficial when working with this kit.

• A PC, to run the provided Graphical User Interface (GUI) and program the RD-K344BMU board
• A JTAG debugger, to program the RD-K344BMU board. The recommended debugger is a PE Micro Multilink FX.
• An external power supply, to use the BATT-14EXTENDER in voltage divider mode (optional)

Software requirements

In addition to the kit contents, the following software is beneficial when working with this kit.

• FreeMASTER 3.1, for measurement visualization using the HVBMS Start-up kit Note: FreeMASTER is a user-friendly real-time debug monitor and data visualization tool that enables runtime configuration and tuning of embedded software applications, with integrated drivers for S32 Design Studio.

Powering and connecting the system

To connect and power-up the system, please complete the following steps.

• Connections of the boards

  • Unpack all boards and cables from the kit
  • Connect the multipurpose cable to the RD-K344BMU (J1)
  • Connect the Cell Monitoring Unit
  • Connect the ETPL cable to the RD-K344BMU (J2) and the RD33775ACNTEVB (J37)
  • Connect the four supply cables to the RD33775ACNTEVB (J1, J34, J35 and J36) and the BATT-14EXTENDER (J2, J3, J4 and J5)
  • Connect the supply cable to the BATT-14EXTENDER (J1) and the BATT-14CEMULATOR (J1)
  • Connect the Battery Junction Box
  • Connect the ETPL cable between the RD-K344BMU (J5) and the RD772BJBTPLEVB (J9)
  • Connect the BJB supply cable between the RD-K344BMU (J1, 4-pin connector, pins 11 to 14) and the RD772BJBTPLEVB (J12)

• Powering the boards

  • Power the CMU and the battery emulation system, by powering the BATT-14CEMULATOR using the provided power supply and adapter (J6)
  • Power the Battery Management Unit, by connecting the provided power supply to the multipurpose cable end
    Note: After power-up, hold the Debug button (SW1) to place the board in Debug mode (the SBC watchdog is ignored). The power-on LED (D26) must be on, not blinking.

• Monitoring the system using the HVBMS Start-up kit

  • Open the HVBMS Start-up FreeMASTER project (HVBMS_StartUp_FreeMASTER.pmpx)
  • Connect the provided USB-TTL cable to the RD-K344BMU (J8), ensuring the black wire is on GND, yellow is on TX and orange is on RX.
  • Configure the USB connection on FreeMASTER
  • In the FreeMASTER menu, click Tools and then Connection Wizard…
  • In the Connection Wizard window:
  • click Next
  • Select Use direct connection to on-board USB port and click Next
  • Select the correct USB Serial Port and select 115200 as Baud-rate to probe and click Next
  • Select Yes, use the detected port settings and start using FreeMASTER tool and click Finish
  • Configure and launch the project on FreeMASTER
  • In the FreeMASTER menu, click Project and then Options…
  • In the MAP Files tab, verify the Default symbol file is .\HVBMS_StartUp_FreeMASTER.elf
  • Click OK
  • In the FreeMASTER menu, click Project and then Reload Symbol File
  • In the FreeMASTER menu, click Go! or click Connect in the interface

• Programming the system
  To install the development setup and start programming with the HVBMS Reference Design, please refer to the HVBMS Software Installation Guide.

References

Revision history

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