Battery technology has been crucial in developing new energy and transportation solutions, helping to create a cleaner, more affordable, and secure energy system. However, progress is slow because of a lack of detailed understanding of atomic level processes occurring at battery interfaces. To tackle this, the OPINCHARGE consortium—made up of 10 organizations from 7 countries—is working together to develop advanced techniques to study battery processes in greater detail than ever before. Our approach focuses on three main types of innovative analyses: chemical-based, isotope-based, and physics-based techniques. The key methods we improve include X-ray scattering, enhanced Raman spectroscopy, Scanning Transmission Electron Microscopy-Electron Energy Loss Spectroscopy & Energy Dispersive X-ray Spectroscopy, Focused Ion Beam-Secondary Ion Mass Spectroscopy, Neutron imaging, Online Electrochemical Mass Spectrometry, and Nuclear Magnetic Resonance spectroscopy. Additionally, the team uses Artificial Intelligence and Machine Learning to make data collection and analysis faster and more effective. We also emphasize open data sharing and collaboration to align with the Europe wide initiatives of the research community. The project will last for 36 months and is divided into seven work packages. Luxembourg Institute of Science and Technology leads the consortium while also ensuring that findings are widely shared to maximize the project's impact and benefit the broader scientific community.