Battery Management Systems (BMS) for Electrochemical Impedance Spectroscopy (EIS)

BMS-EIS-SW

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The NXP Battery Management Software (BMS) Electrochemical Impedance Spectroscopy (EIS) Software Enablement Package accelerates development and testing of this solution on customer batteries. It includes an intuitive graphical user interface (GUI) and BMU EIS firmware. Ideal for rapid prototyping and validation, it supports flexible excitation sources tailored to various battery configurations and system requirements.

Diagram

Battery Management Software for Electrochemical Impedance Spectroscopy (EIS)

Battery Management Software for Electrochemical Impedance Spectroscopy (EIS)
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Features

Middleware Level Features

  • Communications delay measurements (R2R), enables precise propagation delay measurements
  • EIS measurement flow with software compensation manages the measurement sequence and applies dynamic corrections
  • Advanced synchronization options - provide fine-grained timing control for coordinated measurements
  • Battery-junction-box (BJB) frequency calibration ensures accurate frequency settings for impedance measurements

BMS SDK Level Features

  • Discrete Fourier transform (DFT) coefficient calculation extracts said coefficients from user input parameters
  • Current or voltage compensation corrects signal deviations for consistent and reliable results
  • Complex impedance calculation computes the impedance values essential for battery diagnostics and modeling
  • Transmission of EIS coefficients to battery cell controller (BCC) or BJB devices to enable downstream processing and integration
  • Support for communication delay measurements on the BCC or BJB and gateway (GTW)

EIS GUI Features

  • Configurable number of BCC devices from 1 to 12
  • Excitation control for different excitation sources
  • Nyquist plots for impedance measurements and additional debug information

Supported Devices

  • BMX6X02: General-Purpose BMS Communication Gateway and EIS Synchronization Controller
  • BMA8420: Battery Junction Box Monitor IC with EIS Capability
  • BMA606X: Wireless Battery Management System Link
  • BMA7418: 18 Channel Li-Ion Battery Cell Controller IC ASIL D with EIS
  • TAA3033: TAA3033 Active Precharge Controller IC

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