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Assessment of vagal nerve integrity in autonomic neuropathy
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A Finite Element Model of 18650 Lithium-Ion Battery for Explosion Caused by Internal Short Circuit
No full textThe lithium-ion battery (LIB) is widely used in portable devices, power tools and electric vehicles, which becomes one of the most important moving power sources. However, inevitable internal short circuits may cause the pressure inside the battery rising, leading to fire or intensive explosion. In this paper, a finite element (FE) model is established to reasonably capture the major explosion behavior of 18650 battery, one of the most prevailing battery models in electric vehicles, caused by internal short circuit. An explosive load is applied to the 18650 battery FE model based on ABAQUS platform to simulate the internal short circuit. The FE model includes key components such as anode part, cathode part, multi-layered separator and the outside shell. Mechanical parameters are taken from previous studies [1] as well as current mechanical testing, with the consideration of temperature, strain rate and anisotropy effect. Result may provide future in-depth studies to study the lithium-ion battery explosion which are not available from the real-world experiment such to guide the optimal design for safe battery manufacturing
ANALISIS KINERJA BATERAI LITHIUM-ION 18650 PADA STAND-ALONE PHOTOVOLTAIC SYSTEM
Get PDFBaterai adalah komponen yang sangat penting pada sebuah sistem PV karena merupakan bagian yang menyimpan daya untuk digunakan ketika PV tidak lagi menghasilkan daya listrik.Dalam stand-alone photovoltaic (PV) systemuntuk suplai tenaga listrik yang berkelanjutan, dibutuhkan baterai yang dapat mengimbangi ketidakstabilan pancaran sinar matahari yang fluktuatif.Penelitian ini menggunakan metode penelitian kualitatif. Subjek penelitian ini ialah perbandingan kinerja baterai Lihitum-Ion 18650 dengan baterai Lead-Acid. Teknik analisis data yang digunakan yaitu analisis deskriptif dengan teknik pengumpulan data yaitu observasi lapangan.Hasil penelitian menujukan bahwa kinerja baterai Lithium-Ion 18650 ketika proses pengisian baterai Lithium-Ion 18650 terisi lebih cepat dan baterai Lead-Acid mengalami kenaikan suhu yang lebih tinggi dibandingkan dengan baterai Lead-Acid. Lalu, ketika proses pengosongan baterai Lithium-Ion 18650 bertahan lebih lama dan memiliki efisiensi yang lebih tinggi dibandingkan dengan baterai Lead-Acid. Selain itu, baterai Lithium-Ion 18650 mengalami kenaikan suhu yang lebih tinggi dibandingan baterai Lead-Acid ketika proses pengosongan
COOLING STRATEGY OF 18650 BATTERY USING MICROFLUIDIC CHANNEL AS HEAT SINK
No full textThis report is mainly focused the cooling strategy for 18650 battery using microfluidic channel. When being charged and discharged, the 18650 battery, which is frequently used in many electronic devices and electric vehicles, generates a lot of heat
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Radial vs. axial cooling for 18650 lithium ion battery cells
No full textElevated temperature is one of the biggest causes of degradation in lithium-ion batteries. In this study the effects of different cooling configurations were compared to the absence of a cooling solution for the common 18650 lithium-ion battery cells. The batteries were exercised through three hundred cycles of high current charge and discharge operations. There were three different test conditions for the 18650 batteries: no cooling, radially cooled, and axially cooled. The reduction in cell capacity was compared between each battery after testing and is the primary datapoint of interest. Temperature differentials were also recorded for each test. Internal battery construction greatly affects the effectiveness of axial cooling while radial cooling generally reduces battery cell temperature more consistently across the 18650 cells. Radially cooling due to the much larger surface area available for heat transfer maximizes temperature reduction under high stress situations and results in the lowest capacity loss. The effects of self-heating in lithium-ion batteries greatly reinforces the need for active thermal management in energy storage and electric vehicle applications to prolong cell life
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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