TI BQ79631-Q1汽车16个电池接线盒电流检测解决方案
TI公司的BQ79631-Q1提供高精度测量分压电压的器件,从高压节点如电池接线盒(BJB)或电池断开装置(BDU)系统的Pack+(高压电池正端),保险丝,电荷(端口),链路(负载).主要电压测量能利用集成数字低通滤波器来进行.器件具有高精确集成电流检测ADC,能测量低边并联电阻的电流.器件能够用内部ADC测量隔离电阻,并能控制这种测量所需的任何开关方案.器件有8个GPIO/辅助输入,能用来热电偶测量,驱动继电器,测量电压和成为外设SPI器件的主SPI接口.隔离的双向菊花链端口支持基于电容或变压器的隔离.器件还支持UART通信.器件满足汽车应用的资质,满足AEC-Q100资质下列结果:工作温度grade 1:–40°C 到本 +125°C,HBM ESD分类level 2和CDM ESD分类level C4B.器件具有8个GPIO输入如IO, SPI, ADC和温度检测.主要用在全电动汽车,插电式混合动力车和混合动力汽车.本文介绍了BQ79631-Q1主要特性, 简化系统框图以及评估模块BQ79631 EVM主要特性和BMS系统图, 评估模块BQ79631 EVM电路图,材料清单和PCB设计图.
BQ79631-Q1 provides high-accuracy measurement capable of measuring divided down voltages from high voltage nodes such as Pack+ (HV Battery Positive terminal), Fuse, Charge (Port), Link (Load) in a battery junction box (BJB) or battery disconnect unit (BDU) system. Key voltage measurements can make use of the integrated digital low-pass filters.
The device has a highly accurate integrated current sense ADC capable of measuring current in low-side shunt resistor. The device is capable of measuring the insulation resistance with internal ADC and able to control any switching scheme needed for this
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