Denna rapport behandlar ett examensarbete för högskoleingenjörsprogrammet inom innovationsteknik och design vid Karlstad universitet. Arbetet är genomfört av Rasmus Baudtler, handledare för projektet var Lennart Wihk och examinator professor Leo De Vin. Projektet är utfört på uppdrag av Zoundindustries, Stockholm. Utvecklare av moderna ljudprodukter. Uppdraget har fokuserats mot att hitta en alternativ lösning för laddning till den trådlösa hörluren Plattan ADV Wireless från varumärket Urbanears. Det huvudsakliga målet var att utveckla en lösning utifrån designmetodik baserad på användarstudier och ingenjörsteknik med syfte i att förenkla laddningsscenariot för användaren och öka tillgängligheten för laddning. Projektet har utförts enligt den industriella produktutvecklingsprocessen med fokus inom designprocessen. Arbetet startade i en omfattande förstudie innehållande en produktutvärdering, en teknikstudie samt användarstudier genom designmetodik. Detta ledde till i en projektinriktning mot induktiv laddning. Med kunskap inom användarens önskemål och teknikens krav sammanställdes en kravspecifikation med en uppdaterad problemformulering. Genom konceptsframtagningsmetoder togs ett flertal koncept fram utifrån kravspecifikationen. Koncepten behandlades sedan genom olika typer av matriser i ett konceptval som resulterade i ett slutgiltigt konceptval. Det slutgiltiga valet var en portabel laddningsplatta med inbyggt batteri. Konceptet ansågs förenkla laddningsscenariot och öka tillgängligheten för användaren. Utvecklingsarbetet fortgick genom fastställande av gränssnitt mellan laddare och hörlur, användarscenarion, modell- och prototypbygge. Det slutgiltiga konceptet presenterades i form av 3D-renderingar och uppvisning av prototyperna vid en utställning vid Karlstads universitet. Genom utvecklingsarbetet uppfylldes de krav som ställts på produkten och en möjlig implementering av tekniken i nuvarande produkt kunde bekräftas. Därför anses projektet stå till svar för den problemformulering som ställts upp i projektet. För vidare utveckling av konceptet anses följande områden behöva kompletteras eller undersökas: teknikstudie genom expertis, anpassningsarbete av kretskort, utvärdering av produktens anslutningar samt utvärdering av produktens batteri.

The development of electronic textiles has increased significantly during the last ten years. By integrating electronic components or using conductive thread you can create textiles with different technical functions. CEVT is a innovation company within the automotive industry who have gained interest in electronic textiles. The department of innovation want to explore the possibility to integrate electronic textiles into future cars. The mission they have assigned us is a sub-goal in a larger end goal in which we will investigate whether one can develope a textile that can charge a phone wirelessly. To do this, a textile transmitter coil must be produced to enable the induction charging, which is what wireless charging really means. The method that was chosen to produce the textile transmitter coil was embroidery and the conductive thread that was used was a silver plated polyamide thread (HC12) from Sheildex. The thread had a resistance of <100 Ω per meter and some difficulties arose early on, where the resistance of the embroidered coil was to high. To reduce the resistance multiple stitches were sewn together and the conductive thread was also used as a lower thread. The resistance of the final coil had an average of almost 15 Ω which was significantly higher than desired. Tests were made to measure the inductive capability of the embroidered coil. This was done by measuring the power transmission between an embroidered coil and a Samsung Galaxy s8 reciever coil. The results showed that a power transmission was enabled, which means that it works. Though the power transmission was a lot lower when compaired to a commercial transmitter coil that was tested at the same time. The project did not result in a fabric that could wirelessly charge a mobile phone. Nevertheless, the test results showed that it is possible, since a power transmission did occur between the textile coil and the coil from the Samsung. Further research and optimization of the textile coil would be required to realize the induction charging textile. Two interesting ways to go would be by using another embroidery technique called Fibre Tailored Placement (FTP) or by developing a new conductive embroidery thread, with a lower resistance. / The development of electronic textiles has increased significantly during the last ten years. By integrating electronic components or using conductive thread you can create textiles with different technical functions. CEVT is a innovation company within the automotive industry who have gained interest in electronic textiles. The department of innovation want to explore the possibility to integrate electronic textiles into future cars. The mission they have assigned us is a sub-goal in a larger end goal in which we will investigate whether one can develope a textile that can charge a phone wirelessly. To do this, a textile transmitter coil must be produced to enable the induction charging, which is what wireless charging really means.The method that was chosen to produce the textile transmitter coil was embroidery and the conductive thread that was used was a silver plated polyamide thread (HC12) from Sheildex. The thread had a resistance of <100 Ω per meter and some difficulties arose early on, where the resistance of the embroidered coil was to high. To reduce the resistance multiple stitches were sewn together and the conductive thread was also used as a lower thread. The resistance of the final coil had an average of almost 15 Ω which was significantly higher than desired.Tests were made to measure the inductive capability of the embroidered coil. This was done by measuring the power transmission between an embroidered coil and a Samsung Galaxy s8 reciever coil. The results showed that a power transmission was enabled, which means that it works. Though the power transmission was a lot lower when compaired to a commercial transmitter coil that was tested at the same time.The project did not result in a fabric that could wirelessly charge a mobile phone. Nevertheless, the test results showed that it is possible, since a power transmission did occur between the textile coil and the coil from the Samsung. Further research and optimization of the textile coil would be required to realize the induction charging textile. Two interesting ways to go would be by using another embroidery technique called Fibre Tailored Placement (FTP) or by developing a new conductive embroidery thread, with a lower resistance.