SUN Ning, WANG Shenghui, YU Tianjian, et al. SOH Prediction of nickel-cadmium battery based on the charging time under constant voltage rise. [J]. Electric drive for locomotives (5):103-108(2022)
DOI:
SUN Ning, WANG Shenghui, YU Tianjian, et al. SOH Prediction of nickel-cadmium battery based on the charging time under constant voltage rise. [J]. Electric drive for locomotives (5):103-108(2022) DOI: 10.13890/j.issn.1000-128X.2022.05.015.
SOH Prediction of nickel-cadmium battery based on the charging time under constant voltage rise
The state of health (SOH) of nickel-cadmium battery used on EMUs influences the operation safety of trains. Due to the complex working conditions of EMUs
the existing SOH monitoring methods are unable to realize good online monitoring. To study the change tendency of battery SOH and realize online prediction
this paper proposed an online SOH prediction method based on the charging time under constant voltage rise
with the assumption that there is no discharge when using charger to charge the battery. This method determined the optimal constant voltage rising range (i.e. the voltage difference between the start and end of charging) through a comprehensive correlation analysis of charging time under constant voltage rise and battery SOH based on moving voltage window
and then extracted the optimal charging time under constant voltage rise from the voltage range as the input for the long short-term memory (LSTM) model. The sparrow search algorithm (SSA) was used to optimize the LSTM parameters
establishing a battery SOH prediction model
and realizing the online prediction of battery SOH. The test results show that
compared with traditional LSTM and back propagation (BP) neural network
the battery SOH prediction model based on SSA-LSTM has higher prediction accuracy.
关键词
动车组镍镉蓄电池SOH预测等压升充电时间SSA-LSTM
Keywords
EMUsnickel-cadmium batterySOH predictioncharging time under constant voltage riseSSA-LSTM
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