Razvoj nosilnega modula baterijskega paketa za skuter

Pečar, Matic (author), Klemenc, Jernej (mentor)

Pri razvoju nosilnih modulov baterijskega paketa, morajo biti ti zasnovani v skladu s standardi in njihovimi testnimi protokoli, ki predpisujejo zdržljivost in odpornost nosilnih modulov. Eden izmed testnih protokolov zahteva izvedbo testa padca nosilnega modula z višine 1 m. Razvili smo nosilne module, v katere se lahko namesti 48 baterijskih celic LIFePO4 z vso pripadajočo elektroniko. S statično analizo smo preverili trdnost modulov, čemur je sledila nelinearna eksplicitna analiza testa padca (ang. drop test). Analizirali smo test padca pravokotno na dno, rob in vogal nosilnih modulov. Ugotovili smo, da zgolj z uporabo krivljene pločevine, ki ji povečujemo debelino, moduli ne prestanejo padcev na vogal, zato smo vogale obložili s tehnično gumo NBR70 debeline 5mm. Na gumi smo izvedli tlačni preskus, iz katerega smo pridobili materialne karakteristike gume, ki smo jih potem uporabili v numeričnem modelu. Kombinacija gume in krivljene pločevine se je izkazala za učinkovito rešitev.

• Language: Slovenian
• Keywords: skuter, baterijski paket, statična analiza, nelinearna eksplicitna analiza
• Work type: Master's thesis/paper
• Organization: FS - Faculty of Mechanical Engineering
• Year: 2017
• PID: 20.500.12556/RUL-94927
• Publication date in RUL: 11.09.2017

Secondary language

• Language: English
• Title: Research and development of supporting modul for scooter battery pack

Abstract

A battery pack enclosure has to be designed acording to standards and their test procedures which assure the Durability and robustness of the enclosure. One of the test procedures prescriebes execution of a drop test for battery enclosures from a height of 1 meter. We have developed a battery enclosure which can accomodate 48 LiFePO4 battery cells, with all related electonics. To check enclosure strength we used static analysis which was followed by nonlinear explicit analysis for drop test simulation. The drop test analysis was applied perpendicular on the bottom surface, on the edge and on the corner of enclosure. Using only bended sheet metal for the enclosure was not sufficient. That led to applying technical rubber NBR70 with thickness of 5mm on the corners of the enclosure. To obtain rubber properties for explicit analysis uniaxial pressure test was performed. A combination of steel sheetmetal and techinal rubber was effective.

• Keywords: scooter, battery pack, static analysis, nonlinear explict analysis