Data-driven study on memory effect elimination strategy for Nickel-Cadmium batteries in high-speed train sets
In alkaline nickel-cadmium batteries,when not subjected to full charge and discharge cycles over an extended duration,a phenomenon as "memory effect" emerges. This can result in a secondary discharge plateau which leads to diminished battery capacity,necessitating periodic rectifications. Traditional methods used to counteract this effect,particularly in the context of train battery maintenance,are labor-intensive,placing undue stress on maintenance protocols. To alleviate the burdens of energy storage maintenance,extensive research was initiated with a focus on devising optimized strategies for rectifying the memory effect in train batteries that employ nickel-cadmium cells. The article had utilized nickel-cadmium batteries sourced directly from third-level maintenance of trains. The parameters pertaining to the battery charging and discharging cycles were meticulously analyzed. Comprehensive charge-discharge experiments were undertaken,from which data that was intimately tied to battery capacity was garnered. Leveraging feature selection and dimensionality reduction techniques,a novel modeling approach was developed. It termed the cross-weighted coupling method,which amalgamated both linear and non-linear models,yielding an approximate model that mirrors the true dischargeable capacity of the battery. This method effectively eliminated the systemic errors inherent in experimental designs,which were often due to inconsistencies in nickel-cadmium batteries. Building upon this foundational work,by finely tuning critical factors that impact the battery's state,an orthogonal experimental methodology was conceptualized with its core aim being rapidly and safely mitigate the memory effect prevalent in train nickel-cadmium batteries. Rigorous validation coupled with exhaustive safety assessments affirmed the efficacy of this new approach. It not only revives the true capacity of the nickel-cadmium battery but also reduces the time expenditure by approximately 44.15％. Additionally,it curtails battery degradation stemming from overcharging. The implications of this refined strategy are far-reaching,offering the potential to significantly elevate the efficiency and safety standards of maintenance protocols for train nickel-cadmium batteries.
万方数据
维普
