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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 Cell Voltage Measurement Channels
    • 26s – 0V to 5.5V range for cell, -2V to 2V range for busbar
    • 143V Absolute Maximum Rating, 12V minimum
    • Busbar support on every channel, except first channel
    • Stackable up to 128 devices per chain
  • Cell Voltage ADCs
    • < 1.7mV accuracy, -40 to 125C, Cell: 0V to 4.5V
    • Dedicated ADC per channel. Synchronized redundant measurement.
  • Current Sense ADC
    • Input range = ±275mV differential
    • 0.1% accuracy, 10mA (50uΩ RSHUNT)
  • 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
    • Precise device-to-device I/V synchronization
    • Support for pack and module excitation
  • Passive Cell Balancing with integrated FETs up to 300mA @ 85C odd/even balancing with programmable PWM control
  • GPIOs and Sensors
    • 20 GPIOs: Temp Sensor (NTC/PTC), ADC, voltage measurement, interrupt
    • SPI / I2C Hub Interface
    • Temperature Threshold for OTUT and cell balancing PCB temp
    • Pressure Threshold / Peak Detector (Active / Sleep)
  • Ultra-low Power Monitoring
    • Cell over-voltage, under-voltage (OVUV)
    • Cell over-temperature, under-temperature (OTUT)
    • Configurable monitoring period 0.5s to 64s
    • Reverse Wake Up based on selectable faults
  • Diagnostics & Protection
    • Redundant ADCs for cell voltage and temperature
    • Automatic diagnostics during cell balancing in active mode
    • Automatic open wire detection
    • On-chip memory for one-time customer programming
  • Upgraded Isolated Daisy Chain Interface
    • 2Mbps bus speed, Up to 4Mbps with dual SPI
    • Robust to BCI injections
    • Isolation: Transformer or capacitor only
    • FDTI Time: <100ms for 800V packs or 250 cells
    • Support for stack, ring, multidrop and split-ring
  • Low Power Consumption
    • Integrated DC-DC Converter
    • Shutdown: <10uA
    • Ultra-low power monitoring (Deep Sleep): <20uA
    • Active Mode: <5mA
  • Functional Safety-Compliant
    • Developed for functional safety applications
    • Documentation to aid ISO 26262 system design
    • Systematic capability and hardware integrity up to ASIL-D
  • AEC-Q100 Qualified Grade 1
  • Compatible with the BQ79881-Q1 pack monitor.
  • System-level hardware and software development platform with complex device drivers (CDD).
  • 100pin QFP, 0.4mm pitch, PowerPAD on bottom
  • 26 Cell Voltage Measurement Channels
    • 26s – 0V to 5.5V range for cell, -2V to 2V range for busbar
    • 143V Absolute Maximum Rating, 12V minimum
    • Busbar support on every channel, except first channel
    • Stackable up to 128 devices per chain
  • Cell Voltage ADCs
    • < 1.7mV accuracy, -40 to 125C, Cell: 0V to 4.5V
    • Dedicated ADC per channel. Synchronized redundant measurement.
  • Current Sense ADC
    • Input range = ±275mV differential
    • 0.1% accuracy, 10mA (50uΩ RSHUNT)
  • 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
    • Precise device-to-device I/V synchronization
    • Support for pack and module excitation
  • Passive Cell Balancing with integrated FETs up to 300mA @ 85C odd/even balancing with programmable PWM control
  • GPIOs and Sensors
    • 20 GPIOs: Temp Sensor (NTC/PTC), ADC, voltage measurement, interrupt
    • SPI / I2C Hub Interface
    • Temperature Threshold for OTUT and cell balancing PCB temp
    • Pressure Threshold / Peak Detector (Active / Sleep)
  • Ultra-low Power Monitoring
    • Cell over-voltage, under-voltage (OVUV)
    • Cell over-temperature, under-temperature (OTUT)
    • Configurable monitoring period 0.5s to 64s
    • Reverse Wake Up based on selectable faults
  • Diagnostics & Protection
    • Redundant ADCs for cell voltage and temperature
    • Automatic diagnostics during cell balancing in active mode
    • Automatic open wire detection
    • On-chip memory for one-time customer programming
  • Upgraded Isolated Daisy Chain Interface
    • 2Mbps bus speed, Up to 4Mbps with dual SPI
    • Robust to BCI injections
    • Isolation: Transformer or capacitor only
    • FDTI Time: <100ms for 800V packs or 250 cells
    • Support for stack, ring, multidrop and split-ring
  • Low Power Consumption
    • Integrated DC-DC Converter
    • Shutdown: <10uA
    • Ultra-low power monitoring (Deep Sleep): <20uA
    • Active Mode: <5mA
  • Functional Safety-Compliant
    • Developed for functional safety applications
    • Documentation to aid ISO 26262 system design
    • Systematic capability and hardware integrity up to ASIL-D
  • AEC-Q100 Qualified Grade 1
  • Compatible with the BQ79881-Q1 pack monitor.
  • System-level hardware and software development platform with complex device drivers (CDD).
  • 100pin QFP, 0.4mm pitch, PowerPAD on bottom
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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 26 S Battery Monitor with Smart EIS Engine datasheet (Rev. A) PDF | HTML 2026/9/8
技術文章 實現下一階段的電池智慧 PDF | HTML PDF | HTML 2026/8/14
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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