Preparation and characterization of anode foil for aluminum electrolytic capacitors by powder additive manufacturing

Zeng, Xian; Bian, Jiatong; Liang, Lin; Cao, Qian; Liu, Li; Chen, Xiangxiang; Wang, Youyuan; Xie, Xuanyu; Xie, Guoliang

doi:10.1016/j.powtec.2023.118602

Cited by 9 publications

(3 citation statements)

References 17 publications

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“…F1 score = 2 * Sensitivity * Precision Precision + sensitivity (6) where, TP = true positive, TN = true negative, FP = false positive, and FN = false negative. Table 5 shows the performance metrics in evaluating the aluminum electrolytic capacitors under varying temperatures.…”

Section: Results Analysis and Discussionmentioning

confidence: 99%

“…The capacitor's characteristics can deviate from their nominal values at low temperatures, leading to degraded performance and potential failure. It is imperative in aerospace, automotive, and telecommunications applications, where SMPSs are exposed to extreme temperature variations [5,6]. Despite the significance of low-temperature performance, more comprehensive experimental investigations need to focus specifically on aluminum electrolytic capacitors in SMPSs.…”

Section: Introductionmentioning

confidence: 99%

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ANN-Based Reliability Enhancement of SMPS Aluminum Electrolytic Capacitors in Cold Environments

Jeong,

Kareem,

Song

et al. 2023

Energies

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Due to their substantial energy density and economical pricing, switching-mode power supplies (SMPSs) often utilize electrolytic capacitors. However, their ability to function at low temperatures is essential for dependable operation in several sectors, including telecommunications, automotive, and aerospace. This study includes an experimental evaluation of how well standard SMPS electrolytic capacitors operate at low temperatures. This paper investigates the suitability of standard electrolytic capacitors used in switched-mode power supplies (SMPSs) for low-temperature applications. The experimental evaluation exposed the capacitors to temperatures ranging from −5 °C to −40 °C, assessing capacitance (Cp), impedance (Z), dissipation factor (DF), and equivalent series resistance (ESR) at each temperature. The capacitor’s time-domain electrical signals were analyzed using the Pearson correlation coefficient to extract discriminative features. These features were input into an artificial neural network (ANN) for training and testing. The results indicated a significant impact of low temperatures on capacitor performance. Capacitance decreased with lower temperatures, while the ESR and leakage current increased, affecting stability and efficiency. Impedance was a valuable diagnostic tool for identifying potential capacitor failure, showing a 98.44% accuracy drop at −5 °C and 88.75% at the peak temperature, indicating proximity to the manufacturer’s specified limit. The study suggests further research and development to improve the performance of electrolytic capacitors in SMPS systems under cold conditions, aiming to boost efficiency and reliability.

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Section: Results Analysis and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

ANN-Based Reliability Enhancement of SMPS Aluminum Electrolytic Capacitors in Cold Environments

Jeong,

Kareem,

Song

et al. 2023

Energies

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show abstract

“…Using additive manufacturing technology, anode foils were created for aluminum electrolytic capacitors. The impact of particle size and sintering temperature on the anode foil was studied [21], and the findings revealed that the sintering neck and particle size were crucial in determining the electrical characteristics of the produced powder foil. Pan et al [22] examined the process of creating anodic aluminum foil, which involves several steps such as hydration, formation, heat treatment, and phosphoric acid treatment.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Recrystallization Behavior of Heating Rate-Controlled Electrolytic Capacitor Aluminum Foil under Cold Forming and Annealing

Wang

Tai-bin

Che³

et al. 2023

Materials

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A novel annealing process of controlled heating rate is used to produce severe cold-formed aluminum plates, which are processed into aluminum foil and mainly used for high-voltage electrolytic capacitor anodes. The experiment in this study focused on various aspects such as microstructure, recrystallization behavior, grain size, and grain boundary characteristics. The results revealed a comprehensive influence of cold-rolled reduction rate, annealing temperature, and heating rate on recrystallization behavior and grain boundary characteristics during the annealing process. The heating rate applied plays a crucial role in controlling the recrystallization process and the subsequent grain growth, which ultimately determines whether or not the grains will become larger. In addition, as the annealing temperature rises, the recrystallized fraction increases and the grains size decreases; conversely, the recrystallized fraction decreases as the heating rate increases. When the annealing temperature remains constant, the recrystallization fraction increases with a greater deformation degree. Once complete recrystallization occurs, the grain will undergo secondary growth and may even subsequently become coarser. If the deformation degree and annealing temperature remain constant, the increased heating rate will result in a lower recrystallization fraction. This is due to the inhibition of recrystallization, and most of the aluminum sheet even remains in a deformed state before recrystallization. This kind of microstructure evolution, grain characteristic revelation, and recrystallization behavior regulation can provide effective help for enterprise engineers and technicians to guide the production of capacitor aluminum foil to a certain extent, so as to improve the quality of aluminum foil and increase the electric storage performance.

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Composition and performance of electrolyte for wide-temperature aluminum electrolytic capacitors

Zhang,

Niu,

Zhou

et al. 2024

J. Korean Ceram. Soc.

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Preparation and characterization of anode foil for aluminum electrolytic capacitors by powder additive manufacturing

Cited by 9 publications

References 17 publications

ANN-Based Reliability Enhancement of SMPS Aluminum Electrolytic Capacitors in Cold Environments

ANN-Based Reliability Enhancement of SMPS Aluminum Electrolytic Capacitors in Cold Environments

Microstructure and Recrystallization Behavior of Heating Rate-Controlled Electrolytic Capacitor Aluminum Foil under Cold Forming and Annealing

Composition and performance of electrolyte for wide-temperature aluminum electrolytic capacitors

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