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Styrsystem för solcellsladdade batterier
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Biomedical Engineering and Health Systems, Health Informatics and Logistics.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Biomedical Engineering and Health Systems, Health Informatics and Logistics.
2018 (Swedish)Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesisAlternative title
Control system for solar charged batteries (English)
Abstract [sv]

Användandet av solceller ökar kontinuerligt i Sverige och effekten som genererasav solcellerna förvaras oftast i bly-syra batterier. Dessa batterier har en dåligpåverkan på miljön eftersom det krävs mycket energi och miljöfarliga material såsom bly och svavelsyra för att tillverka dessa batterier. Östersjökompaniet AB ochmånga av dess kunder inser vikten av ett hållbart tänkande och var intresseradeav att veta om det var möjligt att maximera livslängden av dessa batterier. Underarbetets gång analyserades olika metoder för upp- och urladdning av batterier somkan påverka ett batteris livslängd och hur man kan bära sig åt för att optimera det.En laddningskontroller användes för att optimera laddningen av batteriet. För attberäkna laddningsnivån i batteriet användes metoden ”Extended voltmeter”. Enprototyp som kunde ladda batterierna på ett optimalt sätt, varna då batterietsladdningsnivå blev för låg samt en användarvänlig applikation för övervakning avbatteriet konstruerades. Ett batteris beräknade livslängd är ingen exakt vetenskap.Enligt studier kan livslängden av ett batteri fördubblas om det laddas upp ochladdas ur på ett optimalt sätt i jämförelse med då det laddas ur helt.

Abstract [en]

The use of solar cells is continuously increasing in Sweden and the powergenerated by the solar cells is usually stored in lead acid batteries. These batterieshave a bad impact on the environment as much energy and environmentallyhazardous materials like lead and sulfuric acid are required to manufacture thesebatteries. Östersjökompaniet AB and many of its customers realize the importanceof sustainable thinking and were interested in knowing if it was possible tomaximize the lifetime of these batteries. During the course of the work, differentmethods of battery charging and discharging were analyzed that could affect thebatteries lifetime and how to take care of them to optimize them. A chargecontroller was used to optimize the charge of the battery. To calculate theremaining state of charge in the battery, the Extended voltmeter method was used.A prototype that was able to charge the batteries optimally, warn when the batterycapacity became too low, and a user-friendly application for battery monitoring wasdesigned. The calculated lifetime of a battery is not an exact science. According tostudies the lifetime of a battery can be doubled if it is c

Place, publisher, year, edition, pages
2018. , p. 70
Series
TRITA-CBH-GRU ; 2018:52
Keywords [en]
Lead-Acid batteries, optimal battery charging, microcontroller, Extended voltmeter, solar cells
Keywords [sv]
Bly-syra batteri, optimal batteriladdning, mikrokontroller, Extended voltmeter, solceller
National Category
Embedded Systems
Identifiers
URN: urn:nbn:se:kth:diva-230114OAI: oai:DiVA.org:kth-230114DiVA, id: diva2:1216523
External cooperation
Östersjökompaniet AB
Subject / course
Embedded System Design
Educational program
Bachelor of Science in Engineering - Electrical Engineering
Supervisors
Examiners
Available from: 2018-06-13 Created: 2018-06-11 Last updated: 2018-06-13Bibliographically approved

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Styrsystem för solcellsladdade batterier(1424 kB)264 downloads
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Type fulltextMimetype application/pdf

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