GaN and SiC are ‘wide bandgap’ power semiconductors that deliver higher efficiency at faster switching speeds, with smaller system size and lower costs than legacy silicon chips. 03, 2022 (GLOBE NEWSWIRE) - Navitas Semiconductor (Nasdaq: NVTS), the only pure-play, next-generation power semiconductor company, and VREMT, industry-leading electric powertrain supplier to ZEEKR, Volvo, Polestar and Lotus, announced the opening of an advanced, joint R&D power semiconductor laboratory to accelerate EV power-system developments using Navitas’ GaNFast (gallium nitride, GaN) power ICs and GeneSiC (silicon carbide, SiC) power MOSFETs and diodes.

Furthermore, the tomographic images of LIBs demonstrate that the increased internal gaps within the electrodes result in the increase of internal resistance, and the mechanism for capacity loss of batteries in the cyclic is revealed.New lab accelerates development of advanced EV high-voltage applications using Navitas’ GaNFast™ and GeneSiC™ power semiconductors Cyclic charge/discharge of LIBs with different deformations show that with an increase in cycles, the capacity and state-of-health (SOH) of mechanically deformed LIBs decrease significantly due to the changes in the internal structure of batteries. Results show that with an increase in mechanical deformation, the internal resistances of LIBs increase, charging curves move to high voltage areas, and peak points of the incremental capacity (IC) curves decrease and move to high voltage areas. Secondly, X-ray computed tomography (XCT) technology is utilized to qualitatively analyze the internal structure variations of LIBs caused by minor mechanical deformation.

Firstly, incremental capacity analysis (ICA) is performed to quantify the charge/discharge performance and cycle aging behavior of LIBs under different deformations.

This study uses non-destructive testing methods to analyze the effects of minor mechanical deformation on the lifetime and performance of commercial 21700 lIBs. Vehicular lithium-ion batteries (LIBs) may suffer from minor damage or defects owing to external mechanical abuse, such as deformation and scratches, during cycling.

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