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Disassembly Planning and Assessment of Automation Potentialsfor Lithium-Ion Batteries from Electric Vehicles
University West, Department of Engineering Science, Division of Production Systems.
2020 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

For covering the objectives of this study extensive literature review viz. published papers, books and views of external experts are referred. It has been observed that the study pertaining disassembly of the battery pack with hybrid mechanism comprising robots and human operation is very limited and no economically viable system is developed. Therefore, an attempt was made to design and develop a suitable working platform with the collaborative support of robot and manual operation for disassembly of the battery pack. To improve the efficiency of the recycling process a properly designed disassembly sequence is necessary. To design the sequence an experiment was done on Magna 2009 battery pack composed of Lithium Iron Phosphate (LiFePO4). The battery pack is manufactured in Austria during the year 2009. This battery pack is mostly used in hybrid passenger vehicles. The disassembly of a the Magna 2009 battery pack was found to be complex due to different types of screws used for different joints. The design of the battery pack being compact it was difficult to access all parts for dismantling. Depending on the disassembly process an excel sheet was prepared to envisage all steps followed for this process. Accordingly, the 2D drawing of the station layout was prepared. In this process, the use of computervision for the battery disassembly, use of bar code for identification of types of the battery pack, robot controller,etc. was envisaged for better disassembly of the battery pack. With the help of AutoCAD, the design of the station layout was prepared. The designed layout envisages six working stations. The information related to each station like equipment used, operator used is furnished in the tabulated form separately for each activity. The details pertaining design of the workstation are given in chapter no.6. Recycling of spent or used batteries has to be environmentally safe and economically viable. Further, it is time consuming process and therefore has to be planned properly. The usual process adopted in the recycling of waste or used battery is -pyrometallurgical recovery, hydrometallurgical reclamation, physical separation, etc. The process details of different types of batteries are given in chapter no.3. There are many levels of fire safety systems that could be applied in the design of battery to prevent it from short circuits and other malfunctions like overheating and thermal runaway. Though many safety strategies could be included to monitor the cell conditions but its inclusion in large Li-ion batteries is not viable because those safety systems could increase the weight, volume and cost of the battery.

Place, publisher, year, edition, pages
2020. , p. 63
Keywords [en]
Disassembly sequence, Station Layout, Lithium Ion, Machine Vision
National Category
Robotics
Identifiers
URN: urn:nbn:se:hv:diva-16112Local ID: EXR900OAI: oai:DiVA.org:hv-16112DiVA, id: diva2:1509356
Subject / course
Robotics
Educational program
Master i robotik och automation
Supervisors
Examiners
Available from: 2020-12-14 Created: 2020-12-13 Last updated: 2020-12-14Bibliographically approved

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