Measuring isolation of high voltage battery in electric vehicles

U ovom diplomskom radu obrađena je teorija mjerenja izolacije visokonaponske baterije u električnim automobilima. Ukratko su opisani standardi koji propisuju udaljenosti i potrebne iznose izolacije za sustav do 1000 V. Opisan je referentni dizajn Texas Instrumentsa na kojemu se temelji metoda mjerenja izolacije koja je korištena u diplomskom radu. Provedene su simulacije kruga za mjerenje izolacije. Opisan je proces dizajniranja shema i odabira komponenata na PCBu. Dizajniran je topološki nacrt PCBa i opisane su specifičnosti na koje je trebalo paziti prilikom crtanja topološkog nacrta zbog prisutnosti visokog napona. Nakon lemljenja svih komponenata na PCB, odrađena su testiranja dizajna u rasponu od 400 V do 1000 V, u koracima po 100 V, za razne kombinacije izolacijskih otpora. Naposljetku, odrađena je usporedba rezultata simulacija i rezultata testiranja dizajna.The isolation measurement theory of the high voltage battery in electric vehicles has been described in this Master's Thesis. The standards that prescribe clearance and creepage distance needed for the system up to 1000 V have been described briefly. The reference design of Texas Instruments, which is a base of the Master's Thesis, has been described. The simulations of the isolation measurement circuit have been conducted. The process of the schematic design and component selection for the PCB has been described. The layout of the PCB has been designed and the specifics that had to be taken into consideration for high voltage design have been described. After soldering all the components on the PCB, the design testing has been conducted in the range from 400 V up to 1000 V, in the steps of 100 V, for different combinations of the isolation resistances. Finally, the comparison of the simulation results and the test results have been conducted