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Optimering av batterisystem hos ALPHA-drönaren
KTH, School of Electrical Engineering and Computer Science (EECS).
KTH, School of Electrical Engineering and Computer Science (EECS).
2023 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Optimization of the battery system in the ALPHA drone (English)
Abstract [en]

The purpose of this work was to construct an improved battery system for the ALPHA-drone. Severalareas of improvements were examined, among them were general improvements regarding capacityand weight, as well as implementing new functionality such as mid-flight error detection andmanagement of individual cells. Modularity was also a key focus, with the wish for a system thatwould allow for different loadouts depending on the current scenario. This has resulted in a batterysystem based on lithium-ion cells of the 18650 variant, consisting of smaller battery packs connectedin parallel, each including eight cells. One such prototype-pack has been designed, built and tested ina lab environment. This pack serves as a fully functional base-system upon which more packs can beadded in the future. It has a nominal voltage of 14\(\:\)V, can measure the current and temperatureof each cell, and based on these measurements, disconnect a cell if harmful currents or temperaturesare detected.

Abstract [sv]

Syftet med detta arbete var att konstruera ett förbättrat batterisystem för ALPHA-drönaren. Fleraförbättringsområden undersöktes, bland annat generella förbättringar gällande kapacitet och vikt,samt implementation av ny funktionalitet som felavkänning och hantering av enskilda celler underflygning. Modularitet var även ett centralt fokus, med önskan om ett system som skulle möjliggöraolika mätutrustning beroende på det aktuella scenariot. Detta har resulterat i ett batterisystembaserat på litiumjonceller av 18650-varianten, som består av mindre, parallellt anslutna batteripaket,som inkluderar åtta battericeller vardera. Ett sådant prototyp-paket har designats, konstruerats ochtestats i labbmiljö. Det konstruerade paketet kan fungera som ett självständigt system som till vilketytterligare batteripaket kan läggas till i framtiden. Det har en nominell spänning på 14\(\:\)V, kanmäta strömmen och temperaturen för varje cell samt koppla bort celler om de uppmättaströmmarna eller temperaturerna når skadliga nivåer.

Place, publisher, year, edition, pages
2023. , p. 449-458
Series
TRITA-EECS-EX ; 2023:174
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-341647OAI: oai:DiVA.org:kth-341647DiVA, id: diva2:1822790
Supervisors
Examiners
Projects
Kandidatexjobb i elektroteknik 2023, KTH, StockholmAvailable from: 2023-12-27 Created: 2023-12-27

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