摘要:对VRLA电池的荷电状态(state of charge,SOC)进行估算是蓄电池能量管理的前提。考虑蓄电池充放电电流、工作温度和充放电循环次数等因素影响估算电池SOC的准确度,对传统的能量法进行了修正;通过在电池电压恢复特性曲线基础上建立开路电压预测模型,提取电池E-SOC关系曲线,用于电动势法在线估算;分析两种估算SOC方法的特点,提出了改进的能量-电动势法SOC在线估算的改进方法,从而达到各取所长,优势互补的效果。实验结果表明改进的能量-电动势法SOC估算方法简单实用、准确度高。
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