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ADI AD7284八路锂电池监控系统解决方案

ADI公司的AD7284是完整的14位分辨率锂电池监控系统,包含了堆栈锂电池如用在混合动力汽车和备用电池通用监控所需要的全部功能.AD7284具有复接电池电压和辅助的ADC测量通路,支持4到8个电池的测量.器件提供最大可调整误差(TUE) ±3 mV,包括从输入到输出的所有内部误差.主要的ADC分辨率是14位,AD7284还包括综合二次测量路径,以验证主ADC上的数据.其它的诊断特性包括检测开路输入,通信和电源相关的故障.±16 mV 标准电池堆栈电压 (TUE) 精度,内部温度传感器,VDD工作范围为10 V至40 V,结温范围为−30C至+120C,符合汽车应用要求.主要用在锂电池监控,电动和混合动力汽车,固定动力应用.本文介绍了AD7284主要特性,功能框图和菊花链连接案例图,八电池组的主配置图,三个器件的菊花链配置图以及评估板EV-AD7284SSSDZ主要特性,功能框图,电路图和材料清单.

 

 The AD7284 contains all the functions required for the general- purpose monitoring of stacked Li-Ion batteries, as used in hybrid electric vehicles and battery backup applications. The AD7284 has multiplexed cell voltage and auxiliary, analog- to-digital converter (ADC) measurement channels supporting four to eight cells of battery management. The device provides a maximum total unadjusted error, TUE, (cell voltage accuracy) of ±3 mV that includes all the internal errors from input to output. The primary ADC resolution is 14 bits. The AD7284 also includes an integrated secondary measurement path that validates the data on the primary ADC. Other diagnostic features include the detection of open inputs, communication, and power supply re

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