便携式仪器锂电池管理系统的设计与研制
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摘要
锂电池组管理系统是保证地质勘查、辐射监测中便携式仪器安全、可靠运行的关键。为延长电池使用寿命,准确掌握电池工作状态,设计了一种基于Bq40z50-R1电源芯片的锂电池组管理系统。该系统具有充放电状态自动切换、过充保护、电池耗尽保护、最大充电电流限制、温度保护等功能,同时可进行电池均衡及剩余容量估算。经试验测试,系统容量估算最大相对误差为2.64%,其它保护特性满足要求。该系统可为便携式仪器电源管理设计提供参考。
The lithium battery management system is important to ensure the safety, reliability and efficiency of portable instrument applied in geological survey and radiation monitoring. To prolong the life cycle of batteries and master working state of batteries, the lithium battery management system is designed and developed based on the Bq40 z50-R1. The system has multiple protection characteristics,including automatic switching between charge and discharge states, overcharge protection, under-voltage protection, maximum charge current limitation, temperature protection, timeout and et al.The battery equalization method is designed to compensate the unbalance batteries, and the remaining capacity estimation function is increased to estimate the remaining working hours. The test experiment shows that the maximum relative error of capacity estimation is 2.64% and other protection characteristics are reasonable. The battery management system can be used as a reference for portable instrument power design.
The lithium battery management system is important to ensure the safety, reliability and efficiency of portable instrument applied in geological survey and radiation monitoring. To prolong the life cycle of batteries and master working state of batteries, the lithium battery management system is designed and developed based on the Bq40 z50-R1. The system has multiple protection characteristics,including automatic switching between charge and discharge states, overcharge protection, under-voltage protection, maximum charge current limitation, temperature protection, timeout and et al.The battery equalization method is designed to compensate the unbalance batteries, and the remaining capacity estimation function is increased to estimate the remaining working hours. The test experiment shows that the maximum relative error of capacity estimation is 2.64% and other protection characteristics are reasonable. The battery management system can be used as a reference for portable instrument power design.
引文
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[9]时玮,姜久春,李索宇,等.磷酸铁锂电池SOC估算方法研究[J].电子测量与仪器学报,2010,24(08):769-774.
[2]李文娟,张宏坤,贾海涛,等.锂离子电池正极材料Li Fe PO4的研究新进展[J].河北工业科技,2011,28(3):216-220.
[3]尤晓蕾,任纪伟,刘亚.24 V/20 A磷酸铁锂电池管理系统的硬件设计[J].物联网技术,2017,7(6):49-50.
[4]黎林.纯电动汽车用锂电池管理系统的研究[D].北京:北京交通大学,2009.
[5]乔思洁.锂电池管理系统的研究与设计[D].青岛:中国海洋大学,2009.
[6]毛龙,李宏建,胡志坤,等.基于SOC分时控制容量可变锂电池管理系统设计与实现[J].宇航计测技术,2016,36(3):19-26.
[7]李争,智若东,孙宏旺,等.基于开路电压预测的SOC估算方法[J].河北工业科技,2017,34(1):36-40.
[8]徐欣歌,杨松,李艳芳,等.一种基于预测开路电压的SOC估算方法[J].电子设计工程,2011,19(14):127-129.
[9]时玮,姜久春,李索宇,等.磷酸铁锂电池SOC估算方法研究[J].电子测量与仪器学报,2010,24(08):769-774.