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Study of the Temperature and Aging Impact on an Enhanced Coulomb Counting Method for Estimating SOC of Lead-Acid Batteries. 温度和老化对改进的库仑计数法估算铅酸电池荷电状态影响的研究。

... IEEE Energy Conversion Congress and Exposition. IEEE Energy Conversion Congress and Exposition Pub Date : 2024-01-01 DOI: 10.1109/ecce55643.2024.10860785

Shokoufeh Valadkhani, Muhammad Abdelraziq, Zhansen Akhmetov, Samuel Klein, Zeljko Pantic

{"title":"Study of the Temperature and Aging Impact on an Enhanced Coulomb Counting Method for Estimating SOC of Lead-Acid Batteries.","authors":"Shokoufeh Valadkhani, Muhammad Abdelraziq, Zhansen Akhmetov, Samuel Klein, Zeljko Pantic","doi":"10.1109/ecce55643.2024.10860785","DOIUrl":"10.1109/ecce55643.2024.10860785","url":null,"abstract":"Lead-acid batteries are widely used in power wheelchairs due to their safe and reliable operation. To ensure optimal performance, longevity, and reliability, Battery Monitoring Systems (BMS) play a critical role in monitoring and controlling the charging and discharging of the batteries. State-Of-charge (SOC) estimation is the most crucial part of the BMS, as it enables the BMS to accurately track the battery's capacity and prevent overcharging or over-discharging of the batteries. As batteries age, factors like electrode degradation and electrolyte breakdown decrease capacity, leading to aged batteries being unable to provide as much charge as new ones even when fully charged. Temperature also plays a significant role in altering batteries' characteristics, affecting performance and capacity. Temperature variation can affect the rate of chemical reactions within the battery, cause it to age more rapidly, and affect its ability to hold a charge. This empirical study focuses on investigating the impact of temperature and aging on the Enhanced Coulomb Counting (ECC) method used to determine the SOC of sealed lead-acid batteries used in power wheelchairs. Considering temperature changes, the proposed method shows a very accurate SOC estimation for both aged and new batteries. In particular, the SOC estimation is significantly more precise for aged batteries, achieving about 32% improvement in accuracy.","PeriodicalId":520908,"journal":{"name":"... IEEE Energy Conversion Congress and Exposition. IEEE Energy Conversion Congress and Exposition","volume":"2024 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12188912/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144500361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Practical Implementation of a Two-Stage 350-W Universal Charger for Power Mobility Device Charging Applications. 一种用于电力移动设备充电的两级350w通用充电器的实际实现。

... IEEE Energy Conversion Congress and Exposition. IEEE Energy Conversion Congress and Exposition Pub Date : 2023-01-01 DOI: 10.1109/ecce53617.2023.10362824

Muhammad Abdelraziq, Ujjwal Pratik, Zhansen Akhmetov, Stephen Paul, Gabriel Chenevert, Zeljko Pantic

{"title":"A Practical Implementation of a Two-Stage 350-W Universal Charger for Power Mobility Device Charging Applications.","authors":"Muhammad Abdelraziq, Ujjwal Pratik, Zhansen Akhmetov, Stephen Paul, Gabriel Chenevert, Zeljko Pantic","doi":"10.1109/ecce53617.2023.10362824","DOIUrl":"10.1109/ecce53617.2023.10362824","url":null,"abstract":"A universal, two-stage (PFC+LLC) charger is developed for Power Mobility Device (PMD) charging applications (i.e., electric wheelchairs and scooters). A rectifier-boost PFC topology is used to interface with the AC grid, establishing a ≈386-VDC bus and maintaining around 96% efficiency for all loading conditions. A dual-loop controller for the LLC resonant converter with a wide operation region is designed to achieve CC-CV for different capacities of 24-V batteries. The LLC converter achieves a peak efficiency of 95.5%, making the two-stage charger 91.6% efficient. This paper presents a comprehensive design, implementation, and testing validation for major aspects of the charger. The charger is rigorously tested, passing all power factor (PF), total harmonic distortion (THD), and conducted EMI safety requirements set by IEC 61000-3-2 and CISPR 22 regulatory standards. The paper not only offers theoretical insights but also presents a comprehensive guide to the practical design and testing procedures of every facet of the charger.","PeriodicalId":520908,"journal":{"name":"... IEEE Energy Conversion Congress and Exposition. IEEE Energy Conversion Congress and Exposition","volume":"2023 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12188925/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144500360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0