原标题：TI bq76PL455A-Q116路锂电池平衡参考设计TIDA-00817

　　TI公司的bq76pl455A-Q1是用于高可靠汽车应用的16路锂电池监测和保护器件.集成的高速差分电容隔离通信接口允许16个bq76PL455A-Q1通过UART接口和主器件通信,监测和检测几种不同的故障状态包括过压,欠压,超温和通信故障.满足 AEC-Q100汽车规范,主要用在电动和混合动力汽车(EV, HEV,PHEV, Mild Hybrid),48V系统,能量存储(ESS)和UPS以及电动自行车和电动滑板车.本文介绍了bq76PL455A-Q1主要特性,框图,应用电路以及16路锂电池平衡参考设计TIDA-00817主要特性,框图,电路图,材料清单和PCB设计图.

　　The bq76PL455A-Q1 device is an integrated 16-cellbattery monitoring and protection device, designed forhigh-reliability automotive applications. The integratedhigh-speed, differential, capacitor-isolatedcommunications interface allows up to sixteenbq76PL455A-Q1 devices to communicate with a hostvia a single high-speed Universal AsynchronousReceiver/Transmitter (UART) interface.

　　The bq76PL455A-Q1 monitors and detects severaldifferent fault conditions, including:overvoltage,undervoltage,overtemperature,and communicationfaults. Six GPIO ports as well as eight analog AUXADC inputs are included for additional monitoring and programmable functionality.A secondary thermalshutdown is included for further protection.

　　bq76PL455A-Q1主要特性:

　　• Monitors and Balances 6-to-16 Cells per Device

　　• Highly Accurate Monitoring

　　– High Performance 14-bit Analog-to-DigitalConverter (ADC) With Internal Reference

　　– All Cells Converted in 2.4 ms (Nominal)

　　– Eight AUX Inputs for Temperature and OtherSensors with Input Voltage of 0 V to 5 V

　　– Internal Precision Reference

　　• Integrated Protector With Separate Vref forOvervoltage (OV) and Undervoltage (UV)

　　Comparators and Programmable VCELL Set Points

　　• Engineered for High System Robustness

　　– Up to 1-Mb/s Stackable Isolated Differential-UART

　　– Up to 16 ICs in Daisy-Chain With Twisted Pair

　　– Passes Bulk Current Injection (BCI) Test

　　– Designed for Robust Hot-Plug Performance

　　• Passive Balancing with External n-FETs andActive Balancing with EMB1428Q/EMB1499Q

　　• Can Help Customers Meet Functional SafetyStandard Requirements (For Example, ISO26262)

　　– Built-in Self-Tests to Validate Defined InternalFunctions

　　– Support for Open Wire Detection

　　• AEC-Q100 Qualified With the Following Results:

　　– Device Temperature Grade 2: –40°C to 105°CAmbient Operating Temperature Range

　　– Device HBM ESD Classification Level 2

　　– Device CDM ESD Classification Level C3

　　bq76PL455A-Q1应用:

　　• Electric and Hybrid Electric Vehicles (EV, HEV,PHEV, Mild Hybrid)

　　• 48-V Systems (Single-Chip Solution)

　　• Energy Storage (ESS) and UPS

　　• E-Bikes, E-Scooters

　　图. bq76PL455A-Q1主器件电路图

　　图. bq76PL455A-Q1另一器件电路图

　　16路锂电池平衡参考设计TIDA-00817

　　Reference Design describes a complete solution forhigh current balancing in battery stacks used for highvoltage applications like xEV vehicles and energystorage systems. The design implements active cellbalancing to compensate for both cell chargemismatch and cell capacity mismatch and obtain theoptimal efficiency of the pack for the lifetime of thesystem.

　　16路锂电池平衡参考设计TIDA-00817主要特性:

　　• Based on bq76PL455A-Q1 Monitor and Protector

　　– Highly Accurate Monitoring of 16 Li-ion Cells

　　– Integrated Redundant Protector

　　• Engineered for High System Robustness

　　– 1-Mb/s Stackable Isolated Differential-UART

　　– Support for Open Wire Detection

　　• 2- to 5-A Active Balance

　　– Fully Isolated Transfer to External 12-V Supplyand Battery

　　• Capable of Compensating for Charge and CapacityMismatch

　　• Up to 16 Stackable Modules

　　参考设计TIDA-00817主要应用:

　　• Electric and Hybrid Electric Vehicles (EV, HEV,PHEV, Mild Hybrid, Start/Stop)

　　• 48-V Systems

　　• Energy Storage (ESS)

　　• Uninterruptible Power Supplies (UPS)

　　图.16路锂电池平衡参考设计TIDA-00817外形图

　　16路锂电池平衡参考设计TIDA-00817材料清单: