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BQ79826Z-Q1

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具有電化學阻抗頻譜引擎的車用 26-S 電池監控器和平衡器

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BQ79826Z-Q1

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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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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 BQ79826Z-Q1 Automotive 26S/24S Battery Monitor with Smart EIS Engine datasheet PDF | HTML 2025/9/29
白皮書 採用電化學阻抗光譜的新一代電池監控 PDF | HTML PDF | HTML 2026/6/9

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

BQ79826Q1EVM-086 — BQ79826Z-Q1 評估模組

BQ79826Z-Q1 評估模組 (EVM) 也稱為 BMS086，說明 TI BQ79826Z-Q1 裝置的一般功能、操作理論、硬體設定與使用。BQ79826ZQ1 裝置是高度整合的可堆疊 26 電池芯監測器，具備高達 300mA 的被動式平衡電流能力、±1.25mV 電池電壓感測準確度以及整合式 OV/UV 電池保護器。此裝置也擁有 20 個多用途 GPIO 針腳，以及額外溫度感測能力，SPI/I2C 控制器匯流排支援和 ASIL-D 功能安全能力。BQ79826Z-Q1 整合電化學阻抗光譜 (EIS) (...)

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驅動程式或資料庫

BQ79826-Q1-DESIGN — BQ79826Z-Q1 design resources

BQ79826Z-Q1 Document Repository
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驅動程式或資料庫

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

EIS design secure folder for BQ798XX-Q1
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支援軟體

BQ79826-Q1-SW — BQ79826-Q1 software

BQ79826-Q1 software
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參考設計

TIDA-010978 — 高達 1500V 可堆疊式電池管理單元參考設計，具整合式 EIS

本參考設計為一款具備全電池溫度感測與高電芯電壓精準度，適用於鋰離子 (Li-ion) 及磷酸鋰鐵 (LiFePO4) 電池組（52s 與 104s）的解決方案。該設計可監測每個電芯的電壓、溫度與阻抗，同時支援整合式電化學阻抗頻譜 (EIS) 及穩固的菊鍊通訊。此設計支援高達 1500V 的可堆疊式儲能系統。這些功能讓此參考設計適用於高容量電池組應用。
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
HTQFP (PZS) 100 Ultra Librarian
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