ARISE

Project summary

The global electric vehicle (EV) market currently depends on battery electric vehicles (BEVs) powered by lithium-ion (Li-ion) batteries with liquid electrolytes. However, despite advances—particularly in Nickel-rich cathode materials—Li-ion batteries are approaching their chemical performance limits and still face serious drawbacks, including flammability, safety risks, electrochemical instability, and limited ion selectivity.

To overcome these limitations, solid-state battery EV (SSBEV) technology offers a promising alternative. Yet, the integration of solid-state batteries (SSBs) into existing BEV platforms presents challenges due to their different operational requirements, including temperature ranges, charging behavior, and safety protocols. These differences demand a comprehensive system redesign.

ARISE aims to develop a fourth-generation (Gen-4) Li-ion solid-state battery system, incorporating a cell-to-chassis architecture with expandable modules adaptable to next-generation SSBEVs.

The project focuses on three key innovation paths:

1. New Chassis Design for city cars optimized for SSB integration and expansion.

2. Novel Thermal Management System tailored to SSB operating conditions.

3. Smart Battery Management System (BMS) for managing battery expansion, fast charging, and safety.

All developments will follow eco-design principles, evaluated through Life Cycle Assessment (LCA) and Techno-Economic Analysis (TEA). The technology will be validated through both physical demonstration and a full-scale virtual model, aligned with Horizon Europe’s Technology Readiness Levels (TRLs).

Our role

Within the ARISE project, GEM promotes an eco-design approach aimed at minimizing the environmental and economic impact of solid-state battery systems throughout their entire lifecycle—from raw material extraction to production, use, and end-of-life management.

Gemmate develops also reduced-order models (ROMs) to efficiently simulate the behaviour of solid-state battery systems under various operating conditions. These models aim to significantly lower computational costs while maintaining sufficient accuracy for system-level integration and control. In particular, the equivalent circuit model (ECM) couples electrical and thermal domains, capturing key non-linear effects driven by State of Charge (SoC) and temperature. The electrical behaviour is represented using a 2RC-branch equivalent circuit model, while the thermal response is simplified through lumped-parameter representations of heat generation and dissipation, ensuring scalability and applicability in real-time applications.