串联锂离子电池组电压巡检电路
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摘要
锂离子动力电池在电动汽车、储能电站等领域应用广泛,其通常采用多单体串并联方式构建电池组对负载供电或储能。电池组中的单体电压是反映电池性能及电池保护的重要参数。论文设计了一种电池组单体电压巡回采集电路。该电路通过单片机、译码器和锁存器等器件控制光电耦合开关把电池单体分时加载到电压测量电路,完成整个电池组所有单体电压的巡检。为解决部分单体共模信号较大,运算放大器无法直接测量问题,设计电阻分压与直接测量两种电压检测模式,通过工作模式切换开关进行单体电压分段测量。实验结果表明,该采集系统性能稳定,可满足大功率串联电池组测量精度要求。
Lithium-ion power batteries are widely used in electric vehicles,energy storage power stations and other fields. numerous singel cell should be serially connecte to build battery packs to supply for load or store energy. The single cell voltage in battery pack is an important parameter reflecting battery performance and battery protection. In this paper,a circuit for collecting single cell voltage is designed.The circuit controls the photoelectric coupling switch to load the battery unit into the voltage measurement circuit by microcontroller,decoder and latch. The circuit completes the inspection of the whole battery unit voltage. In order to solve the problem that some single cell common-mode signals are too large to be measured directly by operational amplifiers,two voltage detection modes of resistance voltage dividing and direct measurement are designed. The sigle cell voltage is measured in different segments by switching switches of working modes. The experimental results show that the voltage monitor circuit has stable performance and can meet the measurement accuracy requirements of high-power series batteries.
Lithium-ion power batteries are widely used in electric vehicles,energy storage power stations and other fields. numerous singel cell should be serially connecte to build battery packs to supply for load or store energy. The single cell voltage in battery pack is an important parameter reflecting battery performance and battery protection. In this paper,a circuit for collecting single cell voltage is designed.The circuit controls the photoelectric coupling switch to load the battery unit into the voltage measurement circuit by microcontroller,decoder and latch. The circuit completes the inspection of the whole battery unit voltage. In order to solve the problem that some single cell common-mode signals are too large to be measured directly by operational amplifiers,two voltage detection modes of resistance voltage dividing and direct measurement are designed. The sigle cell voltage is measured in different segments by switching switches of working modes. The experimental results show that the voltage monitor circuit has stable performance and can meet the measurement accuracy requirements of high-power series batteries.
引文
[1]王慕之,赵思臣,王奔,等.PEMFC电池堆单体电池电压巡检系统开发与实验[J].电源技术,2016,40(1):84-86.
[2]马晓军,可荣硕,魏曙光,等.串联电池组的母线式电压采集系统优化设计[J].兵工学报,2014,35(5):577-582.
[3]倪红军,陈祥,朱建新,等.电池管理系统电压采样电路的设计与研究[J].现代电子技术,2017(10):166-168.
[4]邹浩,于仲安,赵凯贤,等.高精度锂离子电池组电压采集及荷电状态预测[J].科学技术与工程,2017(5):213-217.
[5]李宇佳,王艳,殷天明.一种电动汽车电池隔离采集电路的可靠性研究[J].电子设计工程,2018,26(3):103-106.
[6]高飞,杨凯,王康康,等.锂离子电池安全预警防护系统设计与验证[J].电子设计工程,2019,27(1):1-4.
[7]李玲,耿晓龙,管磊.高压锂电池组单体电压采集电路拓扑研究[J].电源技术,2014,38(8):1447-1449.
[8]于仲安,邹浩,何俊杰,等.高精度锂离子电池电压采集系统设计[J].电源技术,2018,42(7):977-980.
[9]郑林锋,姜久春,王占国,等.锂离子电池电压在线与离线检测设计[J].电源技术,2015,39(1):26-29.
[10]朱晓舟,陈民武,刘湘东,等.基于LabVIEW的PEMFC单电池电压巡检系统设计[J].储能科学与技术,2018(1):123-127.
[11]陈英杰,杨耕,祖海鹏,等.基于恒流实验的锂离子电池开路电压与内阻估计方法[J].电工技术学报,2018,33(17):3976-3988.
[12]刘新天,张晴,何耀,等.锂电池组电压采样线序检测模块的设计与应用[J].电源技术,2018,42(12):1828-1831.
[13]曾洁,徐升荣,刘宾坤,等.一种小功率甲醇燃料电池的电压巡回测量电路[J].电子设计工程,2017,25(14):68-72.
[14]王曦,伍联营,张伟涛,等.铅酸电池开路电压的测量及其与累积放电量的关系[J].储能科学与技术,2018,7(1):75-79.
[15]高锰,池丹丹,梁秀满,等.基于USB接口的质子交换膜燃料电池电压监测[J].电源技术,2017,41(6):869-870.
[16]贺健,赵建平,代作晓.一种锂电池电压检测的拟合方法[J].现代电子技术,2015,38(10):134-136.
[2]马晓军,可荣硕,魏曙光,等.串联电池组的母线式电压采集系统优化设计[J].兵工学报,2014,35(5):577-582.
[3]倪红军,陈祥,朱建新,等.电池管理系统电压采样电路的设计与研究[J].现代电子技术,2017(10):166-168.
[4]邹浩,于仲安,赵凯贤,等.高精度锂离子电池组电压采集及荷电状态预测[J].科学技术与工程,2017(5):213-217.
[5]李宇佳,王艳,殷天明.一种电动汽车电池隔离采集电路的可靠性研究[J].电子设计工程,2018,26(3):103-106.
[6]高飞,杨凯,王康康,等.锂离子电池安全预警防护系统设计与验证[J].电子设计工程,2019,27(1):1-4.
[7]李玲,耿晓龙,管磊.高压锂电池组单体电压采集电路拓扑研究[J].电源技术,2014,38(8):1447-1449.
[8]于仲安,邹浩,何俊杰,等.高精度锂离子电池电压采集系统设计[J].电源技术,2018,42(7):977-980.
[9]郑林锋,姜久春,王占国,等.锂离子电池电压在线与离线检测设计[J].电源技术,2015,39(1):26-29.
[10]朱晓舟,陈民武,刘湘东,等.基于LabVIEW的PEMFC单电池电压巡检系统设计[J].储能科学与技术,2018(1):123-127.
[11]陈英杰,杨耕,祖海鹏,等.基于恒流实验的锂离子电池开路电压与内阻估计方法[J].电工技术学报,2018,33(17):3976-3988.
[12]刘新天,张晴,何耀,等.锂电池组电压采样线序检测模块的设计与应用[J].电源技术,2018,42(12):1828-1831.
[13]曾洁,徐升荣,刘宾坤,等.一种小功率甲醇燃料电池的电压巡回测量电路[J].电子设计工程,2017,25(14):68-72.
[14]王曦,伍联营,张伟涛,等.铅酸电池开路电压的测量及其与累积放电量的关系[J].储能科学与技术,2018,7(1):75-79.
[15]高锰,池丹丹,梁秀满,等.基于USB接口的质子交换膜燃料电池电压监测[J].电源技术,2017,41(6):869-870.
[16]贺健,赵建平,代作晓.一种锂电池电压检测的拟合方法[J].现代电子技术,2015,38(10):134-136.