Lithium ion batteries are complicated distributed parameter systems that can be described preferably by partial differential equations and a field theory. To reduce the solution difficulty and the calculation amount, ...Lithium ion batteries are complicated distributed parameter systems that can be described preferably by partial differential equations and a field theory. To reduce the solution difficulty and the calculation amount, if a distributed parameter system is described by ordinary differential equations （ODE） during the analysis and the design of distributed parameter system, the reliability of the system description will be reduced, and the systemic errors will be introduced. Studies on working condition real-time monitoring can improve the security because the rechargeable LIBs are widely used in many electronic systems and electromechanical equipment. Single particle model （SPM） is the simplification of LIB under some approximations, and can estimate the working parameters of a LIB at the faster simulation speed. A LIB modelling algorithm based on PDEs and SPM is proposed to monitor the working condition of LIBs in real time. Although the lithium ion concentration is an unmeasurable distributed parameter in the anode of LIB, the working condition monitoring model can track the real time lithium ion concentration in the anode of LIB, and calculate the residual which is the difference between the ideal data and the measured data. A fault alarm can be triggered when the residual is beyond the preset threshold. A simulation example verifies that the effectiveness and the accuracy of the working condition real-time monitoring model of LIB based on PDEs and SPM.展开更多
温度是锂离子电池状态监测的关键监测量,在电池的寿命预测、热失控预警和热管理决策等方面有着十分重要的作用。为此,从锂离子电池的内部温度监测(internal temperature monitoring,ITM)方法、温敏电参数和基于电化学阻抗谱(electrochem...温度是锂离子电池状态监测的关键监测量,在电池的寿命预测、热失控预警和热管理决策等方面有着十分重要的作用。为此,从锂离子电池的内部温度监测(internal temperature monitoring,ITM)方法、温敏电参数和基于电化学阻抗谱(electrochemical impedance spectroscopy,EIS)的在线ITM方法3个方面对相关研究进行整理和分析。首先,介绍3种锂离子电池ITM方法,即温度传感器、电池热模型和EIS;然后,总结现有EIS温敏电参数的5种基本特性,并从7个维度对基于EIS的在线ITM方法进行分析。最后,综合现有研究,指出基于EIS的在线ITM方法面临的挑战和未来发展趋势。展开更多
文摘Lithium ion batteries are complicated distributed parameter systems that can be described preferably by partial differential equations and a field theory. To reduce the solution difficulty and the calculation amount, if a distributed parameter system is described by ordinary differential equations （ODE） during the analysis and the design of distributed parameter system, the reliability of the system description will be reduced, and the systemic errors will be introduced. Studies on working condition real-time monitoring can improve the security because the rechargeable LIBs are widely used in many electronic systems and electromechanical equipment. Single particle model （SPM） is the simplification of LIB under some approximations, and can estimate the working parameters of a LIB at the faster simulation speed. A LIB modelling algorithm based on PDEs and SPM is proposed to monitor the working condition of LIBs in real time. Although the lithium ion concentration is an unmeasurable distributed parameter in the anode of LIB, the working condition monitoring model can track the real time lithium ion concentration in the anode of LIB, and calculate the residual which is the difference between the ideal data and the measured data. A fault alarm can be triggered when the residual is beyond the preset threshold. A simulation example verifies that the effectiveness and the accuracy of the working condition real-time monitoring model of LIB based on PDEs and SPM.
文摘温度是锂离子电池状态监测的关键监测量,在电池的寿命预测、热失控预警和热管理决策等方面有着十分重要的作用。为此,从锂离子电池的内部温度监测(internal temperature monitoring,ITM)方法、温敏电参数和基于电化学阻抗谱(electrochemical impedance spectroscopy,EIS)的在线ITM方法3个方面对相关研究进行整理和分析。首先,介绍3种锂离子电池ITM方法,即温度传感器、电池热模型和EIS;然后,总结现有EIS温敏电参数的5种基本特性,并从7个维度对基于EIS的在线ITM方法进行分析。最后,综合现有研究,指出基于EIS的在线ITM方法面临的挑战和未来发展趋势。
