时钟电池老化规律及寿命预测模型分析

Analysis of degradation law and lifetime prediction model for smart meter battery

时钟电池存储特性及存储寿命直接关系到智能电表的运行可靠性与稳定性。为了分析时钟电池的老化规律与剩余寿命,建立了时钟电池的老化及电压测试平台,获得了不同温度和存储时间下的时钟电池电压衰减数据,基于Li/SOCl2电池老化机理,建立了时钟电池剩余寿命模型。对时钟电池的存储寿命与自放电速率评估结果表明:随着温度升高与存储时间增加,电池电压以指数规律衰减。该结果对智能电表的失效机理分析及维护具有一定的指导意义。

The long-term storage characteristics and the storage lifetime of the smart meter battery(SMB)are closely related to its reliability and stability.In order to study the degradation law and storage lifetime of the smart meter batteries,in this paper,a test platform for investigating the degradation and remaining capacity of the smart meter battery is constructed,and conclusions on the batteries voltage degradation with various aging temperature and storage time are drawn.According to the aging mechanism of the Li/SOCl2 cells,the lifetime prediction model of the smart meter battery is built.Results of storage lifetime and self-discharge rate indicate that the residual voltage decays exponentially with the increase of the aging temperature and storage time.Conclusions are theoretically in favor of the analysis of the failure mechanismand maintenance of the smart meter battery.