Electrochemical Energy Storages of Mobile Work Machines
Leskinen, Juho (2015)
Leskinen, Juho
Tampereen ammattikorkeakoulu
2015
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2015112818300
https://urn.fi/URN:NBN:fi:amk-2015112818300
Tiivistelmä
This thesis was conducted to support research and development functions in mobile work machines, or sometimes called non-road mobile machinery, concerning especially electrochemical energy storages in hybrid-electric applications. The scope was in applications where an on-board charging system is present and the machine has the ability to drive fully electrically, thus fulfilling the characteristics expected from a hybrid-electric application.
The work discusses present energy storage technologies and how they are applied in mobile work machines. Electrochemistry, energy control, thermal management and components are examined. The goal of the work was to support future R&D activities and to give predictions of future developments. One of the fundamental parts of the work is the analysis on energy requirement of a work machine under varying load conditions.
The methods of research were literature study and model-based computer simulation. The literature research covered accessible publications on existing solutions in the field of components, systems and control methods applied in energy storages, and on the associated governing phenomena. The simulation covered a development of a principle model of an energy storage system, based on the results of the literature study, able to simulate, to some extent, the behavior of energy storages under different load conditions.
Based on the literature research and application examples, work machines with natural idling in their work cycle are the ideal candidates for hybridization. The nature of operation allows battery powered propulsion and work, but also a possibility to charge the battery with a diesel-generator set during idling.
Hybrid technology is rapidly being adopted in the field of mobile work machine manufacturing, allowing opportunities for increases in fuel saving and efficiency. One of the most promising enablers is lithium-ion based electrochemical energy storage.
The energy storage should be designed based on the respective cycle energy of the machine and on the capacity of the on-board charging system. Also the selection of the chemistry should be thoroughly investigated for applicability to the machine requirements. Safety, lifetime, environmental performance and cost are to be assessed in addition to electrical performance and capacity.
The work discusses present energy storage technologies and how they are applied in mobile work machines. Electrochemistry, energy control, thermal management and components are examined. The goal of the work was to support future R&D activities and to give predictions of future developments. One of the fundamental parts of the work is the analysis on energy requirement of a work machine under varying load conditions.
The methods of research were literature study and model-based computer simulation. The literature research covered accessible publications on existing solutions in the field of components, systems and control methods applied in energy storages, and on the associated governing phenomena. The simulation covered a development of a principle model of an energy storage system, based on the results of the literature study, able to simulate, to some extent, the behavior of energy storages under different load conditions.
Based on the literature research and application examples, work machines with natural idling in their work cycle are the ideal candidates for hybridization. The nature of operation allows battery powered propulsion and work, but also a possibility to charge the battery with a diesel-generator set during idling.
Hybrid technology is rapidly being adopted in the field of mobile work machine manufacturing, allowing opportunities for increases in fuel saving and efficiency. One of the most promising enablers is lithium-ion based electrochemical energy storage.
The energy storage should be designed based on the respective cycle energy of the machine and on the capacity of the on-board charging system. Also the selection of the chemistry should be thoroughly investigated for applicability to the machine requirements. Safety, lifetime, environmental performance and cost are to be assessed in addition to electrical performance and capacity.