Determination of Power Train Losses of a Battery Electrical Vehicle with Variation of the Outside Temperature
Lakeit, Kim Malin (2019)
2019
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-201904165434
https://urn.fi/URN:NBN:fi:amk-201904165434
Tiivistelmä
The objective of this thesis was to describe the dependence of the losses in power train of an electric vehicle on the ambient temperature.
In the first part of this thesis, qualitative research was used to describe generally all parts of a powertrain in a BEV. Next, their temperature behaviour as known from literature was explained After that, by means of quantitative methods, a measurement process was created. This included the equation for calculating the energy demand, measurement setup and selection of temperature set points and driving cycles. Moreover, an evaluation concept to illustrate the results was developed.
The results of these measurements showed that the ambient temperature does not significantly influence components such as the e-machines. Other elements for example the transmissions are heavily depending on the component’s temperature. With the increase of the ambient temperature, the losses in the transmissions are reduced.
In the first part of this thesis, qualitative research was used to describe generally all parts of a powertrain in a BEV. Next, their temperature behaviour as known from literature was explained After that, by means of quantitative methods, a measurement process was created. This included the equation for calculating the energy demand, measurement setup and selection of temperature set points and driving cycles. Moreover, an evaluation concept to illustrate the results was developed.
The results of these measurements showed that the ambient temperature does not significantly influence components such as the e-machines. Other elements for example the transmissions are heavily depending on the component’s temperature. With the increase of the ambient temperature, the losses in the transmissions are reduced.