Data Management Plans: the Importance of Data Management in the BIG‐MAP Project**

Open access to research data is increasingly important for accelerating research. Grant authorities therefore request detailed plans how managed in the projects they finance. We have recently developed such a plan EU−H2020 BIG-MAP project—a cross-disciplinary project targeting disruptive battery-material discoveries. Essential reaching goal extensive sharing of across scales, disciplines and stakeholders, not limited European BATTERY 2030+ initiative but within entire battery community. The key challenges faced developing management large complex were generate an overview enormous amount that will be produced, build understanding flow agree on roadmap making all FAIR (findable, accessible, interoperable, reusable). This paper describes process we followed structured plan.