Smart City-Open Innovation Challenge - Catalan Solutions

3 – 5 Nov 2026 | Barcelona - Hospitalet del Llobregat, Spain

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Re-Lion Factory

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re-lion-factory.com/Le Rove, France

About

Re-Lion Factory is a French mission-driven industrial company developing second-life lithium-ion batteries for stationary energy storage. Based near Marseille, the company focuses on extending the life of battery cells from electric mobility applications such as e-bikes, scooters and, in the future, electric vehicles.

Our approach is based on cell-level diagnostics, safe dismantling processes and modular battery architectures designed to make second-life energy storage scalable, repairable and interoperable across different battery formats and vehicle brands. Instead of reusing entire battery packs, Re-Lion Factory develops technologies to individually qualify and reassemble cells into standardized storage systems for solar self-consumption, backup power and low-carbon local energy uses.

The company is currently scaling its first industrial site in Southern France, supported by the European Just Transition Fund and Région Sud. Beyond this first deployment, Re-Lion Factory aims to contribute to the emergence of a resilient European second-life battery ecosystem combining circular economy, local manufacturing, social inclusion and energy sovereignty.

Re-Lion Factory also develops partnerships with social inclusion organisations and vocational reintegration programs as part of its industrial model.

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Energy & Environment

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Re-Lion Factory