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BQ79826Z-Q1

PRESENTACIÓN PRELIMINAR

Monitor y equilibrador de batería 26-S autom. con motor de espectroscopia, impedancia electroquím

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BQ79826Z-Q1

PRESENTACIÓN PRELIMINAR
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Detalles del producto

Rating Automotive Number of series cells (max) 26 Number of series cells (min) 9 Features AEC-Q100 Automotive Qual, ASIL-D, Cell balancing, Electrochemical Impedance Spectroscopy (EIS) Engine, High precision, I2C support, Integrated ADC, Integrated buck converter, Multi-cell support, Open-wire detection, Over-Voltage Protection, Overtemperature protection, Separate MCU requirement, Stackable (built-in interface), Temperature sensing, Under Voltage Protection, Undertemperature protection Vin (max) (V) 145 Communication interface Daisy chain, I2C controller, SPI Operating temperature range (°C) -40 to 125 Battery overvoltage protection (max) (V) 5.5 TI functional safety category Functional Safety-Compliant
Rating Automotive Number of series cells (max) 26 Number of series cells (min) 9 Features AEC-Q100 Automotive Qual, ASIL-D, Cell balancing, Electrochemical Impedance Spectroscopy (EIS) Engine, High precision, I2C support, Integrated ADC, Integrated buck converter, Multi-cell support, Open-wire detection, Over-Voltage Protection, Overtemperature protection, Separate MCU requirement, Stackable (built-in interface), Temperature sensing, Under Voltage Protection, Undertemperature protection Vin (max) (V) 145 Communication interface Daisy chain, I2C controller, SPI Operating temperature range (°C) -40 to 125 Battery overvoltage protection (max) (V) 5.5 TI functional safety category Functional Safety-Compliant
HTQFP (PZS) 100 196 mm² (14 mm × 14 mm)
  • 26 Channels
    • 26S – 0 to 5.5V range for cell, -2V to 2V range for busbar
    • 143V Abs Max Rating, 9V minimum
    • Busbar support on every channel, except first channel.
    • Stackable up to 128 devices
  • Voltage Accuracy
    • <1.7 mV accuracy, -40 to 125C, Cell: 0V to 5.5V
    • Dedicated ADC per channel. Synchronized redundant measurement.
  • Passive Cell Balancing with integrated FETs up to 300mA odd/even balancing with programmable PWM control
  • Smart EIS Engine
    • Integrated Electrochemical Impedance Spectroscopy measurement engine
    • Impedance Accuracy: 1% (with 1A excitation and 200uΩ impedance)
    • Measurement frequency: 0.01Hz to 3.5kHz
    • < 5us I/V synchronization from device to device
    • Support for global and local excitation
  • Sensor & GPIOs
    • 20 GPIO: Temp Sensor (NTC/PTC), voltage measurement, Interrupt
    • SPI / I2C Interface
    • Temperature Threshold (Active / Sleep)
    • Pressure Threshold / Peak Detector (Active / Sleep)
    • On-chip memory for one-time custom programming
  • Diagnostics & Protection
    • Monitoring
      • Low Power Monitoring Mode (<20uA power consumption)
      • Cell Over-voltage, Under-voltage (OVUV)
      • Cell Over-temperature, Under-temperature (OTUT)
      • 2x die temperature monitors
      • Supply (BAT)
      • Open Wire Detection
    • Reverse Wake Up based on selectable faults
    • Redundancy Paths
      • Cell Voltage
      • GPIO/NTC Voltage
      • Limp Home Mode
    • Diagnostics
      • Automatic diagnostics during cell balancing in active mode
    • Functional Safety Compliant
      • Developed under ISO26262
      • System and hardware capability up to ASIL-D
  • Upgraded Daisy Chain Interface
    • 2Mbps bus speed, Up to 4Mbps with dual SPI
    • <+/-5us device to device synchronization
    • Closed Loop BCI: 200mA, Open Loop BCI: 300mA
    • Isolation: Transformer or capacitor-only
    • FDTI Time: <100ms for 800V packs or 250 cells
    • Support for stack, ring, multidrop, and split-ring
    • Device-to-device automatic communications balancing
  • Power
    • Integrated DC-DC Converter
    • Shutdown: <10uA
    • Sleep Mode with monitoring: As low as 20uA
    • Active Mode: <5mA
  • Package
    • 100-pin QFP, 4mm pitch
    • PowerPad on bottom
  • 26 Channels
    • 26S – 0 to 5.5V range for cell, -2V to 2V range for busbar
    • 143V Abs Max Rating, 9V minimum
    • Busbar support on every channel, except first channel.
    • Stackable up to 128 devices
  • Voltage Accuracy
    • <1.7 mV accuracy, -40 to 125C, Cell: 0V to 5.5V
    • Dedicated ADC per channel. Synchronized redundant measurement.
  • Passive Cell Balancing with integrated FETs up to 300mA odd/even balancing with programmable PWM control
  • Smart EIS Engine
    • Integrated Electrochemical Impedance Spectroscopy measurement engine
    • Impedance Accuracy: 1% (with 1A excitation and 200uΩ impedance)
    • Measurement frequency: 0.01Hz to 3.5kHz
    • < 5us I/V synchronization from device to device
    • Support for global and local excitation
  • Sensor & GPIOs
    • 20 GPIO: Temp Sensor (NTC/PTC), voltage measurement, Interrupt
    • SPI / I2C Interface
    • Temperature Threshold (Active / Sleep)
    • Pressure Threshold / Peak Detector (Active / Sleep)
    • On-chip memory for one-time custom programming
  • Diagnostics & Protection
    • Monitoring
      • Low Power Monitoring Mode (<20uA power consumption)
      • Cell Over-voltage, Under-voltage (OVUV)
      • Cell Over-temperature, Under-temperature (OTUT)
      • 2x die temperature monitors
      • Supply (BAT)
      • Open Wire Detection
    • Reverse Wake Up based on selectable faults
    • Redundancy Paths
      • Cell Voltage
      • GPIO/NTC Voltage
      • Limp Home Mode
    • Diagnostics
      • Automatic diagnostics during cell balancing in active mode
    • Functional Safety Compliant
      • Developed under ISO26262
      • System and hardware capability up to ASIL-D
  • Upgraded Daisy Chain Interface
    • 2Mbps bus speed, Up to 4Mbps with dual SPI
    • <+/-5us device to device synchronization
    • Closed Loop BCI: 200mA, Open Loop BCI: 300mA
    • Isolation: Transformer or capacitor-only
    • FDTI Time: <100ms for 800V packs or 250 cells
    • Support for stack, ring, multidrop, and split-ring
    • Device-to-device automatic communications balancing
  • Power
    • Integrated DC-DC Converter
    • Shutdown: <10uA
    • Sleep Mode with monitoring: As low as 20uA
    • Active Mode: <5mA
  • Package
    • 100-pin QFP, 4mm pitch
    • PowerPad on bottom

The BQ79826Z-Q1 is a new high-cell count 26S stackable battery monitor that includes integrated electrochemical impedance spectroscopy (EIS) engine. The EIS engine provides a new way to detect impedance changes in the cell that allows for monitoring of aging, temperature, SoC, thermal runaway and many other cell parameters. In addition, the device incorporates an intelligent sensor controller to enable easier and more reliable sensor measurements.

The BQ79826Z-Q1 is a new high-cell count 26S stackable battery monitor that includes integrated electrochemical impedance spectroscopy (EIS) engine. The EIS engine provides a new way to detect impedance changes in the cell that allows for monitoring of aging, temperature, SoC, thermal runaway and many other cell parameters. In addition, the device incorporates an intelligent sensor controller to enable easier and more reliable sensor measurements.
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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos BQ79826Z-Q1 Automotive 26S/24S Battery Monitor with Smart EIS Engine datasheet PDF | HTML 29/09/2025
Informe Next-Generation Battery Monitoring With Electrochemical Impedance Spectroscopy (Rev. A) PDF | HTML 3/06/2026

Diseño y desarrollo

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Placa de evaluación

BQ79826Q1EVM-086 — Módulo de evaluación BQ79826Z-Q1

El módulo de evaluación (EVM) BQ79826Z-Q1, también denominado BMS086, describe las características generales, la teoría de funcionamiento, la configuración de hardware y el uso del dispositivo BQ79826Z-Q1 de TI. El dispositivo BQ79826ZQ1 es un monitor apilable de 26 celdas altamente integrado con (...)

Productos y hardware compatibles
Controlador o biblioteca

EIS-BQ798XX-Q1-DESIGN — BQ798XX-Q1 Electrochemical Impedance Spectroscopy Design resources

EIS design secure folder for BQ798XX-Q1
Productos y hardware compatibles
Diseño de referencia

TIDA-010978 — Diseño de referencia de unidad de gestión de baterías apilable de hasta 1500 V con EIS integrado

Este diseño de referencia es un paquete de baterías de ion de litio (Li-ion) y fosfato de hierro y litio (LiFePO4) (52s y 104s) con detección de temperatura en todas las celdas y alta exactitud en la tensión de las celdas. El diseño monitorea la tensión, la temperatura y la impedancia de cada (...)
Productos y hardware compatibles
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HTQFP (PZS) 100 Ultra Librarian
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