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BQ79826Z-Q1

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具有电化学阻抗谱引擎的汽车级 26 节串联电池监测器和平衡器

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BQ79826Z-Q1

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产品详情

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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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 BQ79826Z-Q1 Automotive 26 S Battery Monitor with Smart EIS Engine 数据表 (Rev. A) PDF | HTML 2026-9-8
技术文章 赋能电池智能化迈入新阶段 PDF | HTML PDF | HTML 2026-8-14
白皮书 利用电化学阻抗谱实现下一代电池监测 PDF | HTML PDF | HTML 2026-6-9

设计与开发

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评估板

BQ79826Q1EVM-086 — BQ79826Z-Q1 评估模块

BQ79826Z-Q1 评估模块 (EVM) 也称为 BMS086，介绍了 TI 的 BQ79826Z-Q1 器件的一般特性、工作原理、硬件设置以及使用方法。BQ79826Z-Q1 器件是一款高度集成且具备可堆叠特性的 26 节电池监测器，具有高达 300mA 的被动均衡电流能力、±1.25mV 的电池电压检测精度和集成的 OV/UV 电池保护器。此外，该器件配备 20 个具有额外温度感应功能的多功能 GPIO 引脚，支持 SPI/I2C 控制器总线，且满足 ASIL-D 功能安全要求。BQ79826Z-Q1 集成了电化学阻抗谱 (EIS) (...)

支持的产品和硬件
驱动程序或库

BQ79826-Q1-DESIGN — BQ79826Z-Q1 design resources

BQ79826Z-Q1 Document Repository
支持的产品和硬件
驱动程序或库

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

EIS design secure folder for BQ798XX-Q1
支持的产品和硬件
支持软件

BQ79826-Q1-SW — BQ79826-Q1 software

BQ79826-Q1 software
支持的产品和硬件
参考设计

TIDA-010978 — 具有集成 EIS 的高达 1500V 可堆叠电池管理单元参考设计

该参考设计是一种全面的电芯温度传感和高电芯电压精度锂离子 (Li-ion)、磷酸铁锂 (LiFePO4) 电池包（52 芯和 104 芯）。该设计可监测每个电芯的电压、电芯温度和阻抗，同时支持集成电化学阻抗谱分析 (EIS) 和稳健的菊花链通信。此参考设计支持高达 1500V 的可堆叠储能系统。得益于这些特性，该参考设计适用于高容量电池包应用。
支持的产品和硬件
封装 引脚 CAD 符号、封装和 3D 模型
HTQFP (PZS) 100 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

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