摘要
以智能传感器MM912J637为核心，设计了电动汽车电池监测终端，可完成电池电压、电流、温度的高精度同步采集。在此基础上，使用开路电压法、安时法、卡尔曼滤波法相结合的SOC评估算法，实时估计电池的剩余电量。所有的实时监测结果通过LIN网络传送。单体电池电压测量通道使用高共模电压差分放大器，代替了传统飞电容法隔离电路，简化了电路结构。系统中所选元件符合汽车工业标准，工作温度范围宽达-40-125℃，与工业EMC标准兼容，可适应恶劣的车载环境。
Taking the intellectual sensor MM912J637 as the core device, an EV battery monitor was designed, which could accurately measure the voltage, current and temperature of battery simultaneously. Based on data acquired, state of charge was precisely evaluated with the combination approach of open voltage, ampere-hour and Kalman filter. All the realtime date from the monitor would be transmitted through LIN network. A kind of high common-mode voltage difference amplifier was used to measure the voltage of battery cell, which made the hardware much more simple. All the key components can meet the automotive standard, and be in compliance with the industry EMC standard at a wide range of temperature between --40 ℃ and 125 ℃, which will make the monitor be suited to the extremely threatening environment.
出处
《电源技术》
CAS
CSCD
北大核心
2013年第4期569-571,共3页
Chinese Journal of Power Sources
基金
安徽省教育厅资助项目(KJ2011Z072)
