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Battery minimum temperature model: Temperature minimum estimation in a lithium-ion BEV
Mid Sweden University, Faculty of Science, Technology and Media, Department of Computer and Electrical Engineering (2023-).
2023 (English)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
Abstract [sv]

Bilindustrin förflyttar sig mer och mer från bensinmotorn till det mer miljövänliga alternativet den batteridrivna motorn. För att denna övergång skall gå smidigt behöver man hålla en viss standard bensinmotorn har satt för tillgång och prestanda på marknaden. En av de större skillnaderna som finns mellan motorerna är livslängden och en av de viktigaste aspekterna man bör hålla koll på för att gå framåt inom teknologin är temperatur-hantering av batteriet. Målet med arbetet är att skapa en modell för minimumtemperaturen av en CATL 620 C batteri modul. Projektet är avgränsat till körning i kallt klimat. Verktygen som använts har varit MATLAB och dess funktioner för regression, filtrering och diagram som har använts för att analysera fram ett godtyckligt resultat av modellen. Resultaten har bearbetats och jämförts med den gamla modellen och ramverket som använts för att skapa modellen. I många fall är den bättre än den gamla modellen och den följer kurvaturen på den gamla väl i de flesta scenariona men det finns problemfall. Ett av de stora kvarvarande problemområdena är då de största influenstemperaturerna för modellen fluktuerar kraftigt. 

Abstract [en]

The vehicle industry is moving away from combustion engines towards the more environmentally affordable solution electrical engines. For this transition to go smoothly the Battery-electric vehicles needs to have a certain standard that was present in the earlier engine types when it comes to availability and performance. One of the bigger differences is the longevity of the vehicles. A big part of solving that problem in a lithium-ion battery is temperature management. The aim of the project is to create a minimum temperature model of a CATL 620 C battery module. The project is limited to acquired test data from cold climate driving. The tool to solve this was with the help of MATLAB and its functions for regression, filtering and plotting to help us analyse together a viable solution. The results were compared to the old model and the framework for building the model. The model is better than the old model in a lot of cases but there are still problem-areas, especially regarding areas where the influencing temperatures are heavily fluctuating. It seems to follow the dynamics of the framework most of the time otherwise but there are still question marks regarding driving in other type of environments than what has been provided from the test-scenarios

Place, publisher, year, edition, pages
2023. , p. 65
Keywords [en]
Battery-electric vehicle, lithium-ion, temperature model, regression, MATLAB
Keywords [sv]
Batteridriven elbil, Lithium ion batteri, temperatur-model, regression, MATLAB
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-49326OAI: oai:DiVA.org:miun-49326DiVA, id: diva2:1797970
Subject / course
Electrical Engineering ET2
Educational program
Automationsingenjör TAUMG 180 GR
Supervisors
Examiners
Available from: 2023-09-18 Created: 2023-09-18 Last updated: 2023-09-18Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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Output format
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