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Journal ArticleDOI

Process and performance optimization by selective assembly of battery electrodes

01 Jan 2014-CIRP Annals (Elsevier)-Vol. 63, Iss: 1, pp 9-12
TL;DR: In this article, the authors present extended algorithms and their benefits and drawbacks of matching electrodes in order to improve the subsequent electrode packaging process, where the aim is to reach higher cell capacities and optimized performance values by “optimally balanced electrodes regarding the mass loading ratio, which is also related to the specific material capacity.
About: This article is published in CIRP Annals.The article was published on 2014-01-01. It has received 17 citations till now. The article focuses on the topics: Battery (electricity).
Citations
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Journal ArticleDOI
TL;DR: In this article, the carbon black structure in lithium-ion battery electrodes can precisely be governed by careful parameter variations in an upstream dry mixing process, and significant changes in important electrode properties like mechanical, structural and electrical characteristics are achieved and can be described as functions of the process parameters, such as mixing time and mixing intensity.

105 citations

Journal ArticleDOI
TL;DR: In this article, a continuous separator feeding-speed and a high-speed synchronous handling of discrete electrodes has been developed, enabling for a significant decrease of cycle-times and thus reducing manufacturing costs.

17 citations

Journal ArticleDOI
TL;DR: In this paper, a managerial economic model is developed to quickly compare cost of traditional and selective assembly in order to identify the lower cost option, including machining and materials cost, including scrapped parts, as well as gauging/sorting cost and work in process holding cost.

8 citations

Journal ArticleDOI
01 Jan 2018
TL;DR: In this paper, an automated system to accelerate the electrolyte distribution in lithium-ion batteries by press rolling was designed to reduce the wetting time of the battery assembly and formation.
Abstract: During the last years lithium-ion batteries have emerged as the power source of choice for the electric vehicle market. One important step of the lithium-ion battery process chain is electrolyte filling. The electrolyte filling process constitutes the interface between cell assembly and formation and is a quality critical and also time consuming process step. To avoid limitations in battery performance, a homogeneous electrolyte distribution is necessary. Therefore, especially large cells are stored for hours to reduce their wetting time. In order to reduce this wetting time, an automated system to accelerate the electrolyte distribution in lithium-ion batteries by press rolling was designed. For the technical design concept, the degree of kinematic coupling between roller and the drive system for cell transport was determined. Subsequently, an exemplary motion profile and resulting loads due to the rolling process were derived in order to design the drive system. To quantify the influence of press rolling on electrolyte distribution a transparent test cells had been developed for visualization. Finally, a procedure for evaluating the optical data of the macroscopic electrolyte distribution was deducted. 

4 citations


Cites background from "Process and performance optimizatio..."

  • ...These sections contain electrode production, cell assembly and electrochemical characterization [2][3][4]....

    [...]

References
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Journal ArticleDOI
TL;DR: This paper has always been one of my favorite children, combining as it does elements of the duality of linear programming and combinatorial tools from graph theory, and it may be of some interest to tell the story of its origin this article.
Abstract: This paper has always been one of my favorite “children,” combining as it does elements of the duality of linear programming and combinatorial tools from graph theory. It may be of some interest to tell the story of its origin.

11,096 citations

Book
01 May 1995
TL;DR: The second edition of Network and Discrete Location: Models, Algorithms, and Applications as discussed by the authors provides a taxonomy of location problems and models, as well as a full range of exercises to equip readers with an understanding of the basic facility location model types.
Abstract: Thoroughly updated and revised, Network and Discrete Location: Models, Algorithms, and Applications, Second Edition remains the go-to guide on facility location modeling. The book offers a unique introduction to methodological tools for solving location models and provides insight into when each approach is useful and what information can be obtained. The Second Edition focuses on real-world extensions of the basic models used in locating facilities, including production and distribution systems, location-inventory models, and defender-interdictor problems. A unique taxonomy of location problems and models is also presented. Featuring examples using the author’s own software—SITATION, MOD-DIST, and MENU-OKF—as well as Microsoft Office Excel, the book provides: • A theoretical and applied perspective on location models and algorithms• An intuitive presentation of the uses and limits of modeling techniques• An introduction to integrated location-inventory modeling and defender-interdictor models for the design of reliable facility location systems• A full range of exercises to equip readers with an understanding of the basic facility location model types Network and Discrete Location: Models, Algorithms, and Applications, Second Edition is an essential resource for practitioners in applied and discrete mathematics, operations research, industrial engineering, and quantitative geography. The book is also a useful textbook for upper-level undergraduate, graduate, and MBA courses.

1,534 citations

Journal ArticleDOI
TL;DR: In this paper, the authors analyzed the process chain for lithium-ion cells and proposed solutions for the automation of important process steps suitable for mass production, in particular the pre-conditioning of the electrodes and the cell stacking.

76 citations

Journal ArticleDOI
TL;DR: In this article, a complex assembly with three mating parts (as in a ball bearing: an inner race, ball and outer race) is considered for analysis, and a new method is proposed for partitioning the lots to form selective groups.
Abstract: Selective assembly is the method of obtaining high precision assemblies from relatively low precision components. The mating parts are manufactured with wide tolerances. The mating part population is then partitioned to form selective groups. The corresponding selective groups are then assembled interchangeably. The mating parts are manufactured in different processes and in different machines. The standard deviation of the mating parts will be different. The probability of the number of parts in the selective group cannot be the same. A large number of surplus parts is expected according to the difference in standard deviations of the mating parts. In this paper, a complex assembly with three mating parts (as in a ball bearing: an inner race, ball and outer race) is considered for analysis. A new method is proposed for partitioning the lots to form selective groups. By this method, the number of surplus parts is reduced to a large extent. The variation in clearance is minimized and the total number of gr...

53 citations